- A 55-year-old patient presents with chest pain, dyspnea, and palpitations. The ECG shows irregularly irregular rhythm without discernible P waves. Which of the following is the most appropriate initial management?
- Immediate electrical cardioversion
- Intravenous beta-blocker titration
- Continuous heparin anticoagulation
- Undiluted adenosine administration
Correct answer: Intravenous beta-blocker titration
An irregularly irregular ventricular response with no organized atrial activity is atrial fibrillation, and the first move in a stable patient is rate control by intravenous beta-blocker titration. Immediate electrical cardioversion is held for hemodynamic collapse, which is absent here, and it carries embolic risk in an unanticoagulated patient. Continuous heparin anticoagulation lowers later stroke risk but does nothing to the ventricular rate now. Undiluted adenosine administration blocks the atrioventricular node for only seconds and neither converts nor controls fibrillation.
- A patient with a known history of heart failure and recurrent chest pain is suspected of having aortic dissection. Which of the following diagnostic tests is most appropriate to confirm the diagnosis?
- Transthoracic echocardiography (TTE)
- Continuous electrocardiography (ECG)
- Transesophageal echocardiogram (TEE)
- Portable anteroposterior radiography
Correct answer: Transesophageal echocardiogram (TEE)
A transesophageal echocardiogram (TEE) sits directly behind the ascending aorta and arch, so it images the intimal flap with high sensitivity at the bedside in an unstable patient. Transthoracic echocardiography (TTE) is blocked by sternum and lung and misses descending-aorta involvement entirely. Continuous electrocardiography (ECG) records only nonspecific ischemic change and can never establish a dissection. Portable anteroposterior radiography may hint at a widened mediastinum but cannot confirm or exclude the tear.
- A patient arrives in the emergency department with signs of cardiogenic shock. Which of the following hemodynamic parameters is typically observed in cardiogenic shock?
- Depressed cardiac index, widespread arteriolar dilation
- Augmented stroke volume, heightened vascular resistance
- Augmented stroke volume, widespread arteriolar dilation
- Depressed cardiac index, heightened vascular resistance
Correct answer: Depressed cardiac index, heightened vascular resistance
Cardiogenic shock is pump failure, so the pattern is a depressed cardiac index with heightened vascular resistance as reflex vasoconstriction defends pressure. Depressed cardiac index with widespread arteriolar dilation describes late septic decompensation, not pump failure. Augmented stroke volume with heightened vascular resistance is a hyperdynamic hypertensive state and cannot coexist with hypoperfusion. Augmented stroke volume with widespread arteriolar dilation is early distributive shock, the opposite of the cardiogenic profile.
- In a patient presenting with acute myocardial infarction (AMI), which of the following ECG changes most specifically indicates injury to the myocardium?
- ST-segment elevation
- QRS-complex notching
- ST-segment depression
- Deep T-wave inversion
Correct answer: ST-segment elevation
ST-segment elevation marks the zone of acute injury, current of injury flowing across partial-thickness ischemic myocardium, and is the criterion that defines a reperfusion candidate. QRS-complex notching reflects established scar or conduction delay rather than active injury. ST-segment depression indicates subendocardial ischemia, a lesser degree of insult. Deep T-wave inversion also signals ischemia or evolving change and never by itself establishes injury.
- A patient presents to the emergency department with severe chest pain and is diagnosed with a myocardial infarction. Which of the following medications is contraindicated in this patient due to the risk of increasing myocardial oxygen demand?
- Metoprolol
- Dobutamine
- Furosemide
- Amiodarone
Correct answer: Dobutamine
Dobutamine is a beta-1 agonist that raises heart rate and contractility, so it drives myocardial oxygen demand upward in a heart already starved of supply. Metoprolol does the opposite, blunting rate and contractility to lower demand. Furosemide unloads volume and reduces wall stress rather than raising demand. Amiodarone slows conduction and has no inotropic drive of consequence.
- In the management of acute pulmonary edema secondary to heart failure, which of the following interventions is primarily aimed at reducing preload?
- Concentrated supplemental oxygenation
- Sustained bronchodilator nebulization
- Titrated nitroglycerin administration
- Mechanical ventilatory pressurization
Correct answer: Titrated nitroglycerin administration
Titrated nitroglycerin administration dilates venous capacitance vessels first, so venous return and therefore preload fall before any arterial effect appears. Concentrated supplemental oxygenation corrects hypoxemia while leaving filling pressures untouched. Sustained bronchodilator nebulization relieves bronchospasm and does nothing to venous return. Mechanical ventilatory pressurization improves gas exchange and unloads respiratory muscles, acting on work of breathing rather than on preload.
- A 68-year-old patient with a history of chronic atrial fibrillation is being evaluated for syncope. Which of the following is the most appropriate next step in management?
- Upright tilt-table testing protocol
- Immediate oral anticoagulant dosing
- Prolonged carotid sinus compression
- Ambulatory Holter monitor placement
Correct answer: Ambulatory Holter monitor placement
Ambulatory Holter monitor placement records the rhythm during ordinary activity, so it can capture the pause or the rapid ventricular response that produced the collapse. Upright tilt-table testing protocol interrogates vasovagal reflexes and would miss an arrhythmic cause in a chronically fibrillating atrium. Immediate oral anticoagulant dosing lowers embolic stroke risk but explains nothing about the episode. Prolonged carotid sinus compression risks asystole in this age group and cannot document the culprit rhythm.
- In the context of hypertensive emergencies, which of the following drugs is most appropriate for the rapid reduction of blood pressure in a patient with acute ischemic stroke?
- Intravenous labetalol
- Nitroprusside therapy
- Sublingual nifedipine
- Topical nitroglycerin
Correct answer: Intravenous labetalol
Intravenous labetalol gives combined alpha and beta blockade with a predictable, gradual fall in pressure and no cerebral vasodilation, so perfusion of the ischemic penumbra is preserved. Nitroprusside therapy dilates cerebral vessels, raises intracranial pressure and accumulates cyanide on prolonged infusion. Sublingual nifedipine produces an uncontrolled precipitous drop that extends the infarct. Topical nitroglycerin is erratically absorbed and likewise dilates cerebral vessels.
- A patient with a ventricular septal defect post-myocardial infarction is exhibiting signs of heart failure. Which of the following is the most likely cause of these symptoms?
- Sudden pericardial tamponade physiology
- Abruptly established rightward shunting
- Increasing transseptal venous admixture
- Delayed papillary muscle disintegration
Correct answer: Abruptly established rightward shunting
Abruptly established rightward shunting is what a post-infarction septal rupture creates: the higher left-sided pressure drives blood into the right side, so pulmonary flow and right-sided volume load rise and failure appears. Sudden pericardial tamponade physiology follows free-wall rupture instead and presents as obstructive collapse without the murmur and pulmonary congestion described. Increasing transseptal venous admixture would require right-sided pressures to exceed left-sided ones, which does not happen in this setting. Delayed papillary muscle disintegration produces mitral regurgitation, a separate mechanical complication that leaves the septum intact.
- Which of the following conditions is associated with a high risk of developing cardiac tamponade following a myocardial infarction?
- Inferolateral wall MI
- Posteroseptal wall MI
- Extensive anterior MI
- Lateral transmural MI
Correct answer: Extensive anterior MI
Extensive anterior MI carries the greatest rupture and tamponade risk because the left anterior descending artery supplies a large territory that thins and tears through the free wall. Inferolateral wall MI covers a smaller, better collateralized territory. Posteroseptal wall MI more often yields conduction block than free-wall failure. Lateral transmural MI is rare in isolation and seldom reaches the necrotic mass needed for rupture.
- In a patient with acute pericarditis, which of the following ECG findings is most characteristic?
- Focal QRS-complex fragmentation
- Localized ST-segment depression
- Gradual PR-interval lengthening
- Widespread ST-segment elevation
Correct answer: Widespread ST-segment elevation
Widespread ST-segment elevation spanning leads that belong to different coronary territories is the signature of pericardial inflammation rather than of one occluded vessel. Focal QRS-complex fragmentation marks old scar and conduction delay. Localized ST-segment depression confined to contiguous leads points to subendocardial ischemia. Gradual PR-interval lengthening describes atrioventricular nodal block, not irritation of the pericardium.
- Which of the following is the preferred treatment for a patient presenting with symptomatic bradycardia with a heart rate of 40 bpm and hypotension?
- Intravenous atropine administration
- Transcutaneous pacemaker attachment
- Synchronized cardioversion delivery
- Sustained crystalloid resuscitation
Correct answer: Intravenous atropine administration
Intravenous atropine administration is the first drug given for symptomatic bradycardia, blocking vagal tone at the sinus and atrioventricular nodes so the rate and pressure rise. Transcutaneous pacemaker attachment is the fallback once atropine has failed or when high-degree block is present, so it is not the opening treatment. Synchronized cardioversion delivery treats tachyarrhythmias and would do nothing for a rate of forty. Sustained crystalloid resuscitation targets hypovolemia, which is not the mechanism of this hypotension.
- Which of the following laboratory findings is most indicative of cardiac tamponade in a patient presenting with hypotension, jugular venous distension, and muffled heart sounds?
- Rising BNP concentration
- ECG electrical alternans
- Decreasing serum lactate
- Reciprocal ST depression
Correct answer: ECG electrical alternans
Tamponade is recognized at the monitor by ECG electrical alternans, the beat-to-beat swing in QRS amplitude produced by the heart swinging inside a large effusion. Rising BNP concentration reflects ventricular wall stretch in decompensated failure and does not track pericardial compression. Decreasing serum lactate would signal improving perfusion, the opposite of obstructive shock. Reciprocal ST depression belongs to territorial infarction rather than to circumferential compression of the heart.
- In a patient presenting with suspected Takotsubo cardiomyopathy, which of the following echocardiographic findings is most characteristic?
- Systolic outflow tract obstruction
- Prominent right atrial enlargement
- Apical left ventricular ballooning
- Progressive septal wall thickening
Correct answer: Apical left ventricular ballooning
Apical left ventricular ballooning with a hypercontractile base is the stress-cardiomyopathy pattern, and it recovers over weeks once the catecholamine surge subsides. Systolic outflow tract obstruction belongs to hypertrophic disease, where the septum rather than the apex misbehaves. Prominent right atrial enlargement indicates right-sided volume or pressure overload and has no bearing on apical motion. Progressive septal wall thickening is again hypertrophic remodeling and is the structural opposite of apical akinesis.
- A patient with end-stage renal disease on hemodialysis presents with severe hyperkalemia and characteristic ECG changes. Which of the following treatments should be administered first?
- Oral sodium polystyrene sulfonate
- Combined insulin dextrose loading
- Repeat nebulized albuterol dosing
- Prompt calcium gluconate infusion
Correct answer: Prompt calcium gluconate infusion
Prompt calcium gluconate infusion comes first because it antagonizes the membrane effect of potassium and restores the resting potential within a minute or two, which is what the ECG changes demand. Oral sodium polystyrene sulfonate works in the gut over hours and gives the myocardium no protection at all. Combined insulin dextrose loading shifts potassium intracellularly but needs fifteen to thirty minutes. Repeat nebulized albuterol dosing is a slower and less reliable shifting adjunct that cannot stabilize a threatened membrane.
- Which of the following is the most appropriate initial management for a patient with acute right ventricular infarction?
- Aggressive intravascular expansion
- Intravenous nitroglycerin infusion
- Repeated furosemide administration
- Immediate labetalol administration
Correct answer: Aggressive intravascular expansion
Aggressive intravascular expansion is the opening move because a stunned right ventricle is preload-dependent and needs filling to push blood through the lungs to the left side. Intravenous nitroglycerin infusion strips that preload away and precipitates abrupt hypotension. Repeated furosemide administration does the same harm by diuresing a patient who needs volume. Immediate labetalol administration removes the chronotropic compensation on which this ventricle depends.
- For a patient presenting with Marfan syndrome and sudden onset of severe chest pain radiating to the back, which of the following diagnostic procedures is most critical to determine the cause of the symptoms?
- Gadolinium-enhanced MRI scanning
- Contrast-enhanced CT angiography
- Confirmatory D-dimer measurement
- Anteroposterior chest radiograph
Correct answer: Contrast-enhanced CT angiography
Contrast-enhanced CT angiography is obtained within minutes and shows the intimal flap, its proximal extent and branch-vessel involvement, which is what decides surgery in a Marfan patient with tearing pain. Gadolinium-enhanced MRI scanning gives comparable pictures but takes far too long for an unstable aorta. Confirmatory D-dimer measurement are neither sensitive nor specific enough to rule a dissection in or out, and they localize nothing. Anteroposterior chest radiograph can look unremarkable even when a dissection is established.
- In the management of a patient with a large anterior wall myocardial infarction, which of the following complications is most important to monitor for within the first 24 hours?
- Late fibrotic chamber remodeling
- Slow immune pericardial reaction
- Acute ventricular septal rupture
- Sudden right ventricular failure
Correct answer: Acute ventricular septal rupture
Acute ventricular septal rupture is the catastrophe that converts a large anterior infarct into biventricular failure with a new harsh murmur and a thrill, so it is the complication actively watched for. Late fibrotic chamber remodeling unfolds over months and changes nothing at the bedside now. Slow immune pericardial reaction is the Dressler pattern and appears weeks after the event. Sudden right ventricular failure follows inferior territory occlusion rather than an anterior one.
- Which of the following is the most effective therapeutic intervention to prevent stroke in patients with atrial fibrillation?
- Dual antiplatelet inhibition
- Titrated beta-blocker dosing
- Prolonged calcium antagonism
- Chronic oral anticoagulation
Correct answer: Chronic oral anticoagulation
Chronic oral anticoagulation is what cuts thromboembolic stroke in atrial fibrillation, because it attacks the actual mechanism, thrombus forming in a fibrillating left atrial appendage. Dual antiplatelet inhibition is measurably inferior against that mechanism while adding bleeding. Titrated beta-blocker dosing governs the ventricular rate and leaves clot formation untouched. Prolonged calcium antagonism likewise controls rate alone and does nothing about appendage thrombus.
- A patient presents with chest pain, fever, and a friction rub on auscultation. ECG shows diffuse ST elevation. Which of the following is the most likely diagnosis?
- Acute pericarditis
- Massive infarction
- Pulmonary embolism
- Esophageal rupture
Correct answer: Acute pericarditis
Acute pericarditis accounts for the whole cluster: pleuritic pain, fever, a rub, and elevation that crosses coronary territories instead of respecting one. Massive infarction gives territorial elevation with reciprocal depression and produces no rub. Pulmonary embolism causes pleuritic pain and dyspnea but neither a rub nor widespread elevation. Esophageal rupture brings severe pain and fever after forceful vomiting, with mediastinal air rather than an inflamed pericardial sac.
- In a patient with suspected tension pneumothorax, what is the most immediate course of action?
- Surgical thoracostomy, fifth intercostal space
- Needle decompression, second intercostal space
- Pericardial drainage, blind subcostal puncture
- Oxygen supplementation, nasal cannula delivery
Correct answer: Needle decompression, second intercostal space
Needle decompression, second intercostal space in the midclavicular line, vents the trapped air in seconds and is the only step fast enough to reverse obstructive shock at the bedside. Surgical thoracostomy, fifth intercostal space, is the definitive repair but consumes minutes this patient does not have. Pericardial drainage, blind subcostal puncture, empties the wrong cavity altogether. Oxygen supplementation, nasal cannula delivery, cannot move air out of a pleural space that is under pressure.
- A patient with COPD presents with a sudden exacerbation of symptoms. What is the most effective initial treatment?
- Inhaled corticosteroids and anticholinergics
- Parenteral antimicrobials and antihistamines
- Systemic corticosteroids and bronchodilators
- Unrestricted oxygenation and benzodiazepines
Correct answer: Systemic corticosteroids and bronchodilators
Systemic corticosteroids and bronchodilators are started together because one reopens the airway within minutes while the other shortens the whole exacerbation. Inhaled corticosteroids and anticholinergics act too slowly and too weakly to rescue an acute attack. Parenteral antimicrobials and antihistamines treat neither bronchospasm nor airway edema, and drying secretions makes clearance worse. Unrestricted oxygenation and benzodiazepines threaten hypercapnic respiratory depression in a carbon dioxide retainer.
- A patient arrives with suspected epiglottitis. Which of the following signs is a priority for establishing the diagnosis?
- Hoarseness and paroxysmal coughing
- Wheezing and recurrent obstruction
- Crackles and blood-streaked sputum
- Drooling and difficulty swallowing
Correct answer: Drooling and difficulty swallowing
Drooling and difficulty swallowing mean secretions can no longer pass a swollen supraglottis, so they mark the patient whose airway is about to close. Hoarseness and paroxysmal coughing describe croup, a subglottic illness with a very different course. Wheezing and recurrent obstruction localize the problem to the lower airways. Crackles and blood-streaked sputum suggest parenchymal infection rather than supraglottic swelling.
- In the management of acute asthma exacerbation, which of the following medications is considered first-line therapy?
- Short-acting beta-agonists (SABA)
- Slow-acting corticosteroids (ICS)
- Nebulized anticholinergics (SAMA)
- Antileukotriene inhibitors (LTRA)
Correct answer: Short-acting beta-agonists (SABA)
Short-acting beta-agonists (SABA) relax bronchial smooth muscle within minutes, which is exactly what an acute attack needs first. Slow-acting corticosteroids (ICS) work over days on background inflammation and rescue nobody in the department. Nebulized anticholinergics (SAMA) add a little when combined with a beta-agonist but are weak on their own. Antileukotriene inhibitors (LTRA) are preventers with no meaningful rescue bronchodilation.
- For a patient with a flail chest, which of the following is the most appropriate management strategy?
- Intubation and prompt positive ventilation
- Analgesia and close respiratory monitoring
- Strapping and rigid external stabilization
- Thoracotomy and emergent surgical fixation
Correct answer: Analgesia and close respiratory monitoring
Analgesia and close respiratory monitoring let the patient take deep enough breaths to avoid the atelectasis and hypoventilation that actually kill in flail chest. Intubation and prompt positive ventilation are held in reserve for failure and carry their own complications when used routinely. Strapping and rigid external stabilization restrict wall movement and worsen ventilation. Thoracotomy and emergent surgical fixation apply to selected cases much later, not to initial care.
- In the case of a patient presenting with carbon monoxide poisoning, which of the following treatments is most effective?
- Nonrebreather oxygen mask
- Crystalloid fluid boluses
- Hyperbaric oxygen therapy
- Activated charcoal slurry
Correct answer: Hyperbaric oxygen therapy
Hyperbaric oxygen therapy dissociates carboxyhemoglobin fastest and reduces delayed neurologic sequelae, which is why it is preferred for severe exposure when a chamber is reachable. A nonrebreather oxygen mask helps but clears the gas several times more slowly. Crystalloid fluid boluses support pressure while doing nothing to the bound pigment. Activated charcoal slurry binds ingested toxins and is useless against an inhaled gas.
- What is the primary concern in managing a patient with a tracheostomy tube who presents with respiratory distress and inability to pass a suction catheter through the tube?
- Stomal cellulitis
- Tracheal stenosis
- Alveolar collapse
- Cannula occlusion
Correct answer: Cannula occlusion
Cannula occlusion is the immediate worry, because a catheter that will not pass means the lumen is plugged by inspissated secretions or clot and ventilation stops until it is cleared. Stomal cellulitis produces redness and discharge, not a blocked lumen. Tracheal stenosis develops over weeks and would not present abruptly. Alveolar collapse is a downstream consequence of obstruction rather than the reason a catheter jams.
- For a patient experiencing an acute pulmonary edema, which of the following interventions should be prioritized?
- Upright posture and oxygen therapy
- Immediate diuresis and salt limits
- Empiric antibiotics and fever care
- Daily corticosteroids and bed rest
Correct answer: Upright posture and oxygen therapy
Upright posture and oxygen therapy come first because sitting the patient up drops venous return and frees the diaphragm while oxygen corrects the hypoxemia driving the distress. Immediate diuresis and salt limits matter later but act over hours and cannot precede simple positioning. Empiric antibiotics and fever care treat an infection that is not present here. Daily corticosteroids and bed rest have no role in cardiogenic congestion, and immobility makes it worse.
- In the evaluation of a patient with suspected foreign body aspiration, which of the following is the most diagnostic procedure?
- Decubitus radiography
- Flexible bronchoscopy
- Volumetric tomography
- Sequential spirometry
Correct answer: Flexible bronchoscopy
Flexible bronchoscopy shows the airway directly and allows the object to be retrieved in the same sitting, so it both establishes and treats the problem. Decubitus radiography can suggest air trapping but misses radiolucent objects completely. Volumetric tomography reconstructs the airway yet still cannot confirm or remove a lucent foreign body. Sequential spirometry documents flow limitation without ever localizing the obstruction.
- A patient presents with a history of asbestos exposure and a recent onset of dyspnea, chest pain, and a pleural effusion on imaging. Which of the following is the most likely diagnosis?
- Progressive asbestosis
- Pleural adenocarcinoma
- Malignant mesothelioma
- Parapneumonic effusion
Correct answer: Malignant mesothelioma
Malignant mesothelioma is the asbestos-linked pleural tumor that surfaces decades after exposure with dyspnea, chest wall pain and a unilateral effusion. Progressive asbestosis is interstitial fibrosis and produces restriction with basal crackles rather than a pleural collection. Pleural adenocarcinoma can seed the pleura and mimic the picture but carries no specific link to asbestos. Parapneumonic effusion accompanies pneumonia with fever and purulent sputum, neither of which is described.
- In a patient presenting with stridor, which of the following is the most urgent priority?
- Administering antipyretic syrup
- Beginning empirical antibiotics
- Increasing oral corticosteroids
- Ensuring unobstructed breathing
Correct answer: Ensuring unobstructed breathing
Ensuring unobstructed breathing outranks everything else because stridor announces a narrowing upper airway that can close completely within minutes. Administering antipyretic syrup treats a symptom and leaves the narrowing exactly as it was. Beginning empirical antibiotics may be warranted afterwards but does nothing for the lumen now. Increasing oral corticosteroids acts far too slowly to protect an airway that is already critical.
- For a patient with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and respiratory failure, which therapeutic intervention has been shown to improve outcomes?
- Systemic corticosteroids
- Empirical antimicrobials
- Intravenous antioxidants
- Nebulized bronchodilator
Correct answer: Systemic corticosteroids
Systemic corticosteroids are the intervention with a demonstrated mortality benefit in severe viral pneumonitis with respiratory failure, because they blunt the inflammatory lung injury itself. Empirical antimicrobials treat bacterial co-infection when it exists and alter nothing in the viral process. Intravenous antioxidants have not improved outcomes in controlled trials. Nebulized bronchodilator relieve bronchospasm, which is not the mechanism of this hypoxemia.
- What is the most specific sign of a tension pneumothorax on chest X-ray?
- Ipsilateral thoracic overexpansion
- Contralateral mediastinal shifting
- Unilateral parenchymal atelectasis
- Circumferential pleural thickening
Correct answer: Contralateral mediastinal shifting
Contralateral mediastinal shifting is the specific sign, because only air trapped under pressure pushes the heart and trachea away from the affected hemithorax. Ipsilateral thoracic overexpansion appears in a simple pneumothorax as well and therefore separates nothing. Unilateral parenchymal atelectasis accompanies any sizeable pneumothorax and is likewise nonspecific. Circumferential pleural thickening reflects chronic pleural disease and has no bearing on an acute tension physiology.
- In the management of a patient with an acute exacerbation of idiopathic pulmonary fibrosis, which of the following is considered the most appropriate initial treatment?
- Antifibrotic prescription
- Uninterrupted oxygenation
- High-dose corticosteroids
- Emergency transplantation
Correct answer: High-dose corticosteroids
High-dose corticosteroids are the accepted opening treatment in an acute exacerbation, directed at the inflammatory flare superimposed on established fibrosis. Antifibrotic prescription slows long-term decline over months and does nothing for an abrupt deterioration. Uninterrupted oxygenation supports gas exchange while leaving the flare untreated. Emergency transplantation is not a rescue maneuver and requires assessment that takes months to complete.
- Which of the following conditions is characterized by a sudden onset of central chest pain, dyspnea, and a rapid drop in blood oxygen saturation, typically occurring within 72 hours after a surgical procedure?
- Acute alveolar injury
- New basal atelectasis
- Acute venous embolism
- Fat embolism syndrome
Correct answer: Fat embolism syndrome
Fat embolism syndrome fits the stated window: marrow fat reaches the pulmonary circulation one to three days after operation or trauma and produces abrupt hypoxemia with central chest pain. Acute alveolar injury evolves over a similar period but follows sepsis or aspiration and shows diffuse bilateral infiltrates. New basal atelectasis is common after surgery yet causes gradual desaturation, not a sudden collapse. Acute venous embolism from a leg thrombus characteristically declares itself later in the postoperative course.
- A patient with a history of smoking presents with sudden onset of unilateral pleuritic chest pain, dyspnea, and hemoptysis. What is the most likely diagnosis?
- Pulmonary embolism
- Cavitary pneumonia
- Squamous carcinoma
- Small pneumothorax
Correct answer: Pulmonary embolism
Pulmonary embolism accounts for abrupt unilateral pleuritic pain with dyspnea and hemoptysis, the combination produced when an infarcting segment reaches the pleural surface. Cavitary pneumonia builds over days with fever and purulent sputum instead of striking suddenly. Squamous carcinoma does cause hemoptysis in a smoker, but insidiously and without sudden pleuritic pain. Small pneumothorax gives pleuritic pain and dyspnea yet produces no hemoptysis.
- In a patient suspected of having a pneumothorax, which ultrasound finding is most indicative of the condition?
- Dense basal B-lines
- Absent lung sliding
- Focal lobar opacity
- Trace fluid pooling
Correct answer: Absent lung sliding
Absent lung sliding is the indicative finding, because air in the pleural space keeps the visceral and parietal layers from moving against each other. Dense basal B-lines arise only when the two pleural layers are apposed, so their presence argues against a pneumothorax. Focal lobar opacity indicates consolidated lung, the opposite of an air-filled space. Trace fluid pooling describes an effusion, a different collection altogether.
- A patient presents with acute respiratory distress following a severe allergic reaction. Which of the following interventions is most critical?
- Parenteral corticosteroid
- Injectable antihistamines
- Intramuscular epinephrine
- Nebulized bronchodilators
Correct answer: Intramuscular epinephrine
Intramuscular epinephrine is the single intervention that reverses laryngeal edema, bronchospasm and vasodilation within minutes, so it precedes everything else in anaphylaxis. Parenteral corticosteroid acts over hours and at best limits a late-phase relapse. Injectable antihistamines relieve urticaria and itch while doing nothing for airway swelling or shock. Nebulized bronchodilators treat lower airway spasm alone and leave upper airway obstruction and hypotension untouched.
- For a patient with acute respiratory distress and a known history of sarcoidosis, which of the following is the most appropriate management strategy?
- Antitubercular drugs and airborne isolation
- Empirical antibiotics and aerosol albuterol
- Repeated thoracentesis and pleural drainage
- High-flow oxygen and corticosteroid therapy
Correct answer: High-flow oxygen and corticosteroid therapy
High-flow oxygen and corticosteroid therapy is the pairing that supports gas exchange while suppressing the granulomatous inflammation driving a sarcoid flare. Antitubercular drugs and airborne isolation treat the granulomatous mimic this patient does not have. Empirical antibiotics and aerosol albuterol address bacterial infection and bronchospasm, neither of which is the mechanism here. Repeated thoracentesis and pleural drainage presume an effusion, which is not a feature of acute sarcoid deterioration.
- A 55-year-old patient presents with sudden onset of left-sided weakness and dysarthria. A CT scan shows no hemorrhage. The patient's blood pressure is 190/110 mmHg. What is the most appropriate next step in management?
- Alteplase infusion after contraindication screening
- Nifedipine capsules after neurological reassessment
- Passive observation after spontaneous normalization
- Nitroprusside titration after continuous monitoring
Correct answer: Alteplase infusion after contraindication screening
Alteplase infusion after contraindication screening is the next step: imaging has excluded bleeding, and once the checklist is clear and the patient remains inside the treatment window, thrombolysis proceeds with pressure first brought under 185/110 mmHg. Nifedipine capsules after neurological reassessment lower pressure unpredictably by an oral route and squander the window. Passive observation after spontaneous normalization forfeits the only interval in which reperfusion changes the outcome. Nitroprusside titration after continuous monitoring drives pressure far below the safe floor and starves the ischemic penumbra.
- A patient presents with a Glasgow Coma Scale (GCS) score of 8, pinpoint pupils, and decerebrate posturing. Which of the following is the most likely diagnosis?
- Cerebellar infarct
- Opioid obtundation
- Pontine hemorrhage
- Midbrain contusion
Correct answer: Pontine hemorrhage
Pontine hemorrhage produces all three findings at once: destruction of the descending sympathetic fibers leaves pinpoint pupils, while loss of the reticular and red nucleus pathways gives decerebrate posturing and a depressed conscious level. Opioid obtundation also constricts the pupils, but limb tone is flaccid and posturing is absent. Midbrain contusion leaves midposition fixed pupils and more often a decorticate limb pattern. Cerebellar infarct begins with ataxia and vomiting, and its pupils stay reactive until late compression of the fourth ventricle occurs.
- In a patient with suspected bacterial meningitis, which of the following findings in cerebrospinal fluid (CSF) analysis is most indicative of the condition?
- Preserved glucose, marginal protein, monocyte predominance
- Lowered glucose, abundant protein, lymphocyte predominance
- Elevated glucose, reduced protein, eosinophil predominance
- Depressed glucose, raised protein, neutrophil predominance
Correct answer: Depressed glucose, raised protein, neutrophil predominance
Depressed glucose, raised protein, neutrophil predominance is the pyogenic profile: dividing bacteria consume glucose, inflammatory exudate raises the protein, and the acute cellular response is neutrophilic. Preserved glucose with only marginal protein and monocyte predominance describes aseptic viral meningitis, where the organism does not metabolize sugar. Lowered glucose with abundant protein and lymphocyte predominance is the tuberculous or fungal picture, whose course runs over weeks rather than hours. Elevated glucose with reduced protein and eosinophil predominance reflects systemic hyperglycemia or parasitic invasion and excludes a pyogenic cause.
- A 60-year-old patient presents with sudden, severe headache described as "the worst headache of my life," photophobia, and neck stiffness. No focal neurological deficits are noted. Which of the following is the most appropriate diagnostic test to perform initially?
- Prompt CT scan of the head
- Urgent LP tap of the spine
- Full MRI film of the brain
- Late CTA study of the neck
Correct answer: Prompt CT scan of the head
A prompt CT scan of the head comes first in suspected subarachnoid bleeding, because unenhanced imaging of the head detects subarachnoid blood with very high sensitivity in the opening hours. An urgent LP tap of the spine belongs to the patient whose scan is negative while suspicion persists, so a tap of the spine follows imaging rather than replacing it. A full MRI film of the brain is slower, far less available, and insensitive to hyperacute blood inside the brain. A late CTA study of the neck maps the feeding vessels only once the diagnosis has already been made.
- In the context of traumatic brain injury (TBI), which intracranial pressure (ICP) reading necessitates immediate intervention to prevent secondary brain injury?
- >10 mmHg, routine fluctuation
- >20 mmHg, sustained elevation
- >15 mmHg, borderline pressure
- >25 mmHg, hypertensive crisis
Correct answer: >20 mmHg, sustained elevation
Treatment is triggered at >20 mmHg, sustained elevation at which cerebral perfusion falls and ischemic secondary injury begins. A reading of >10 mmHg is a routine fluctuation recorded in almost any ventilated head-injured patient. A reading of >15 mmHg is a borderline pressure that earns closer observation but not therapy. Waiting for >25 mmHg, a frankly hypertensive crisis inside the cranial vault, postpones treatment until herniation risk is already established.
- Which of the following is the most common cause of spontaneous intracerebral hemorrhage (ICH)?
- Coagulopathy
- Angiomatosis
- Hypertension
- Vasculitides
Correct answer: Hypertension
Hypertension accounts for the largest share of spontaneous intracerebral bleeding: chronic pressure loading produces lipohyalinosis and Charcot-Bouchard aneurysms of the deep perforating arteries, which rupture into the basal ganglia, thalamus, pons and cerebellum. Coagulopathy, whether drug-induced or hepatic, enlarges a bleed that has already started but causes only a minority of first events. Angiomatosis and the other vascular malformations dominate in young patients and are uncommon overall. Vasculitides are rare and usually infarct the vessel territory before any bleeding occurs.
- A patient with a known history of epilepsy presents to the emergency department in status epilepticus. Which of the following medications is considered first-line treatment for this condition?
- PO valproate
- IV phenytoin
- PO primidone
- IV lorazepam
Correct answer: IV lorazepam
IV lorazepam is the first-line agent in status epilepticus: it reaches the brain within a minute and its long receptor occupancy keeps the seizure from recurring. IV phenytoin is a second-line agent loaded only after a benzodiazepine has failed, and it takes far too long to infuse to abort the seizure. PO valproate and PO primidone are oral maintenance drugs that a convulsing patient can neither swallow nor absorb in time.
- Which of the following is the most specific sign of meningitis in adults?
- Nuchal rigidity
- Brudzinski sign
- Irritable state
- Positive Kernig
Correct answer: Nuchal rigidity
Nuchal rigidity is the finding this item treats as the specific bedside marker of adult meningitis: resistance to passive neck flexion reflects direct meningeal inflammation rather than a general encephalopathy. The Brudzinski sign is elicited in a small minority of proven cases, so a negative one is worthless and a positive one adds little. A positive Kernig response behaves the same way and is absent in most patients who nonetheless have meningitis. An irritable state accompanies sepsis, hypoxia and intoxication alike and points nowhere in particular.
- In a patient with an acute ischemic stroke, which of the following findings would contraindicate the use of intravenous thrombolytic therapy?
- Migraine aura within the past 14 days
- Major surgery within the past 14 days
- Treated fever within the past 14 days
- High pressure within the past 14 days
Correct answer: Major surgery within the past 14 days
Major surgery within the past 14 days bars intravenous thrombolysis, because a fresh operative bed cannot be compressed and lysing the fibrin there produces uncontrolled bleeding. A migraine aura within the past 14 days marks a stroke mimic, not a bleeding risk, and does not bar treatment. A treated fever within the past 14 days matters only when endocarditis is suspected, which this presentation does not raise. High pressure within the past 14 days is irrelevant, since it is the reading at the moment of dosing that governs, and that reading can be lowered before the infusion.
- A patient presents with acute onset of right-sided weakness and aphasia. Imaging reveals an ischemic stroke in the territory of the left middle cerebral artery. Which of the following motor deficits would you most likely observe?
- Right-sided monoplegia
- Right-sided hemichorea
- Right-sided hemiplegia
- Right-sided hemiataxia
Correct answer: Right-sided hemiplegia
Right-sided hemiplegia follows a left middle cerebral artery infarct: the descending corticospinal fibers of the left hemisphere decussate in the medulla and drive the opposite half of the body, and the same territory holds the language cortex that explains the aphasia. Right-sided monoplegia would mean a single small cortical branch was lost while most of the motor strip survived. Right-sided hemiataxia is a cerebellar or thalamic sign that this anterior circulation territory does not generate. Right-sided hemichorea arises from a subthalamic or striatal lesion rather than a large-vessel cortical infarct.
- For a patient suspected of having a basilar artery occlusion, which of the following symptoms would you most likely observe?
- Hemiparesis and unilateral arm numbness
- Monoparesis and pure sensory impairment
- Hemianopia and acute visual disturbance
- Quadriplegia and cranial nerve deficits
Correct answer: Quadriplegia and cranial nerve deficits
Quadriplegia and cranial nerve deficits define the basilar syndrome: the artery supplies both corticospinal tracts as they run through the pons and the nuclei of the third through twelfth cranial nerves, so every limb weakens at once alongside crossed brainstem signs. Hemiparesis and unilateral arm numbness describe one hemispheric territory rather than the brainstem. Monoparesis and pure sensory impairment fit a small lacunar lesion in the internal capsule. Hemianopia and acute visual disturbance can arise from a posterior cerebral branch, but visual loss on its own does not establish basilar occlusion.
- A 45-year-old patient presents with acute vertigo, dysarthria, diplopia, and right-sided ataxia. Which of the following is the most likely location of the lesion?
- Right cerebellar hemisphere
- Right frontoparietal cortex
- Right centromedian thalamus
- Right anterolateral medulla
Correct answer: Right cerebellar hemisphere
Right cerebellar hemisphere is the site, because cerebellar output projects ipsilaterally, so ataxia felt on the right localizes to the right side, and vertigo with dysarthria and diplopia places the lesion in the posterior fossa. Right frontoparietal cortex would give weakness on the opposite side and no true rotatory vertigo. Right centromedian thalamus disturbs sensation and arousal instead of coordination. Right anterolateral medulla is the medial medullary territory, whose hallmark is crossed hemiparesis with tongue deviation rather than ipsilateral limb ataxia.
- In a patient with a suspected acute subdural hematoma, which of the following findings would you expect on a head CT scan?
- Fusiform-shaped hyperdense zone
- Crescent-shaped hyperdense band
- Biconvex-shaped hyperdense lens
- Globular-shaped hyperdense mass
Correct answer: Crescent-shaped hyperdense band
A crescent-shaped hyperdense band is the acute subdural picture: fresh clot spreads through the potential space between dura and arachnoid, follows the convexity of the brain and crosses suture lines freely. A biconvex-shaped hyperdense lens is the epidural pattern, held in a lentiform contour by the sutures it cannot cross. A fusiform-shaped hyperdense zone describes a dilated vessel wall, not a surface collection. A globular-shaped hyperdense mass sits inside brain tissue and marks an intraparenchymal bleed.
- Which of the following medications is most appropriate for the acute treatment of a headache in a patient with a known arteriovenous malformation (AVM)?
- Inhaled ergotamine
- Buccal sumatriptan
- Oral acetaminophen
- Chewable ibuprofen
Correct answer: Oral acetaminophen
Oral acetaminophen eases the headache without altering vascular tone or platelet function, which is what a patient carrying an arteriovenous malformation needs. Buccal sumatriptan constricts cerebral vessels and is withheld when a malformation may bleed. Inhaled ergotamine is a stronger and far longer-acting vasoconstrictor and draws the same objection. Chewable ibuprofen blocks platelet aggregation and raises the bleeding risk from an already fragile nidus.
- A patient presents to the emergency department with acute confusion, fever, headache, and a petechial rash. Which of the following is the most likely diagnosis?
- Rickettsia rickettsii bacteremia
- Staphylococcus aureus septicemia
- Streptococcus pneumoniae purpura
- Neisseria meningitidis infection
Correct answer: Neisseria meningitidis infection
Neisseria meningitidis infection accounts for fever, headache, rapidly deepening confusion and a non-blanching petechial rash, because the organism seeds the bloodstream and injures small vessels alongside the meningeal inflammation. Rickettsia rickettsii bacteremia also brings fever with petechiae, but its eruption starts on the wrists and ankles after several days of illness rather than within hours. Streptococcus pneumoniae purpura appears almost only in the asplenic patient and usually follows an obvious chest or ear source. Staphylococcus aureus septicemia scatters petechiae through endocarditis, yet its course is subacute and confusion arrives late.
- In the management of a patient with an elevated intracranial pressure (ICP) due to a traumatic brain injury, which of the following interventions is NOT appropriate?
- Prophylactic hypothermia
- Ventriculostomy drainage
- Decompressive craniotomy
- Anticonvulsant phenytoin
Correct answer: Prophylactic hypothermia
Prophylactic hypothermia is the measure that is not endorsed: cooling begun before the pressure rises has failed to improve outcome in randomized trials and adds coagulopathy, arrhythmia and infection. Ventriculostomy drainage removes cerebrospinal fluid and measures the pressure through the same catheter, so it is standard care. Decompressive craniotomy is held back for pressure that resists medical therapy but remains an accepted option. Anticonvulsant phenytoin is given during the first week to suppress early post-traumatic seizures, which themselves drive the pressure higher.
- For a patient presenting with Bell's palsy, which of the following treatments is most effective if started within 72 hours of symptom onset?
- Orally-absorbed antiviral
- High-dose corticosteroids
- Short-term electrotherapy
- Twice-daily physiotherapy
Correct answer: High-dose corticosteroids
High-dose corticosteroids begun inside the first three days give the largest gain in complete recovery from Bell's palsy, because they cut the inflammatory swelling that strangles the facial nerve inside its bony canal. An orally-absorbed antiviral adds little by itself and is at most an adjunct in the severest cases. Short-term electrotherapy has never been shown to change the rate of recovery. Twice-daily physiotherapy preserves muscle bulk and comfort but does nothing to speed nerve regeneration.
- A patient presents with sudden onset of aphasia and right-sided weakness. The patient's CT scan shows no hemorrhage, and the onset of symptoms was 90 minutes ago. Which of the following factors would contraindicate the administration of IV rtPA?
- Chronic use of single agent antiplatelets
- Steady use of standard asthma medications
- Current use of direct oral anticoagulants
- Regular use of migraine relief injections
Correct answer: Current use of direct oral anticoagulants
Current use of direct oral anticoagulants bars thrombolysis, because the drug effect cannot be measured or excluded quickly by routine coagulation testing and the intracranial bleeding risk becomes unacceptable. Chronic use of single agent antiplatelets raises that risk only marginally and is not a bar. Steady use of standard asthma medications has no bearing on coagulation whatsoever. Regular use of migraine relief injections flags a possible mimic to consider, yet it never blocks treatment once the imaging is clear.
- In a patient presenting with signs of increased intracranial pressure (ICP) following a head injury, which of the following ocular signs would most likely be observed?
- Early papilledema
- Partial mydriasis
- Bilateral hyphema
- Sudden anisocoria
Correct answer: Sudden anisocoria
Sudden anisocoria is the ocular sign of rising intracranial pressure after head trauma: the expanding mass drives the uncus against the third cranial nerve, so one pupil dilates while its fellow stays small. Early papilledema needs a day or more of sustained pressure before the disc swells, so it is absent in the opening hours. Partial mydriasis of both pupils reflects a drug or hypoxic effect rather than a localizing lesion. Bilateral hyphema follows direct injury to the globe and says nothing about pressure inside the skull.
- A 28-year-old female presents with sudden-onset right lower quadrant pain, nausea, and a positive pregnancy test. Which of the following is the most likely diagnosis?
- Ectopic gestation
- Luteal hemorrhage
- Acute salpingitis
- Ruptured appendix
Correct answer: Ectopic gestation
Ectopic gestation explains abrupt right lower quadrant pain alongside a positive pregnancy test, because a tubal implantation distends and then tears the tube while the uterine cavity stays empty. Luteal hemorrhage into a corpus luteum cyst gives similar pain, but the pregnancy remains intrauterine and the bleeding settles on its own. Acute salpingitis produces bilateral pain, discharge and fever rather than one sudden unilateral event. Ruptured appendix causes migrating pain with peritonism and bears no relation to the positive test.
- Which of the following is the most appropriate first-line treatment for a patient diagnosed with testicular torsion?
- Ultrasound manual detorsion
- Urgent surgical exploration
- Parenteral antibiotic cover
- Sustained scrotal elevation
Correct answer: Urgent surgical exploration
Urgent surgical exploration is the first-line treatment for testicular torsion: the cord has to be untwisted and both gonads fixed inside roughly six hours if the testis is to survive. Ultrasound manual detorsion can buy time at the bedside but leaves the cord free to twist again and never fixes the testis. Parenteral antibiotic cover belongs to epididymo-orchitis, an entirely different diagnosis. Sustained scrotal elevation eases inflammatory pain and does nothing for a strangulated blood supply.
- A patient presents with acute onset of severe lower abdominal pain, vaginal bleeding, and a history of missed menstrual periods. What is the most important diagnostic test to perform initially?
- Leukocyte determination
- Transabdominal sonogram
- Transvaginal ultrasound
- Cystoscopic examination
Correct answer: Transvaginal ultrasound
Transvaginal ultrasound comes first here, because it resolves an intrauterine sac, free fluid or an adnexal mass at the earliest gestational age and so separates a viable intrauterine pregnancy from an ectopic one. Transabdominal sonogram reaches the same structures only weeks later and misses small early sacs. Leukocyte determination rises in many conditions at once and cannot localize the problem. Cystoscopic examination inspects the bladder, which neither the bleeding nor the missed periods implicate.
- In pregnant patients, which of the following conditions is most likely to mimic the symptoms of acute appendicitis?
- Enterocolitis
- Gastroparesis
- Perihepatitis
- Cholecystitis
Correct answer: Cholecystitis
Cholecystitis imitates appendicitis most often in pregnancy, because the gravid uterus lifts the appendix toward the right upper quadrant where gallbladder pain already sits, and both produce nausea, fever and focal tenderness with a raised white count. Enterocolitis gives diffuse cramping with diarrhea instead of localized rebound. Gastroparesis of pregnancy causes fullness and vomiting with no peritoneal signs. Perihepatitis does hurt in the right upper quadrant, but it is tethered to pelvic infection and a friction rub.
- A patient presents with flank pain, hematuria, and nausea. The pain radiates to the groin. Which of the following is the most likely diagnosis?
- Urolithiasis
- Pyonephrosis
- Epididymitis
- Appendicitis
Correct answer: Urolithiasis
Urolithiasis explains colicky flank pain radiating to the groin with hematuria and vomiting, because a stone lodged at the ureteropelvic or ureterovesical junction distends the collecting system in waves. Pyonephrosis is an obstructed and infected kidney, which would add high fever and rigors this patient does not have. Epididymitis hurts in the scrotum and never begins in the flank. Appendicitis migrates to the right iliac fossa and does not put blood in the urine.
- Which of the following is the primary concern in the management of a patient with a ruptured ectopic pregnancy?
- Peritoneal sepsis
- Hemorrhagic shock
- Urinary retention
- Vasovagal syncope
Correct answer: Hemorrhagic shock
Hemorrhagic shock is the first concern in a ruptured ectopic pregnancy, because eroded tubal vessels bleed freely into the peritoneal cavity and a young patient compensates until the collapse is abrupt. Peritoneal sepsis takes days to develop and follows contamination by bowel content, which a tubal rupture does not spill. Urinary retention is a late and minor consequence of pelvic pain. Vasovagal syncope accompanies severe pain but reverses on lying flat and does not threaten life.
- A patient presents with severe abdominal pain, rebound tenderness, and guarding. Which of the following diagnostic tests is most appropriate to evaluate for peritonitis?
- Quick US study of the abdomen
- Early MRI film of the abdomen
- Urgent CT scan of the abdomen
- Flat AXR plate of the abdomen
Correct answer: Urgent CT scan of the abdomen
An urgent CT scan of the abdomen is the best test for peritonitis, because one pass shows free air, free fluid, abscess and often the perforated viscus itself. A quick US study of the abdomen is defeated by bowel gas and by the guarding that makes probe pressure intolerable. An early MRI film of the abdomen matches the detail but takes far too long in an acute abdomen. A flat AXR plate of the abdomen reveals free air only when the volume is large and identifies no source.
- In the management of ovarian torsion, which of the following is the most definitive treatment?
- Antibiotic therapy
- Depot progestogens
- Ovarian aspiration
- Surgical detorsion
Correct answer: Surgical detorsion
Surgical detorsion is the definitive step: laparoscopic untwisting of the pedicle restores flow to an ovary that is usually salvageable, and fixation can follow in the same sitting. Ovarian aspiration decompresses a cyst yet leaves the twisted pedicle and the ischemia exactly as they were. Antibiotic therapy belongs to tubo-ovarian infection, a different diagnosis with a different mechanism. Depot progestogens can suppress future functional cysts but do nothing for a gonad that is already strangled.
- Which of the following is a critical consideration in the emergency management of placental abruption?
- Immediate delivery of the fetus
- Extended tocolysis of the labor
- Digital palpation of the cervix
- Repeat scanning of the placenta
Correct answer: Immediate delivery of the fetus
Immediate delivery of the fetus is the critical consideration once abruption is significant, because a separated placenta cannot be reattached and every further minute costs fetal oxygenation and maternal blood. Extended tocolysis of the labor is actively harmful, since prolonging the pregnancy prolongs the bleeding behind the placenta. Digital palpation of the cervix is withheld until previa has been excluded, as it can provoke torrential hemorrhage. Repeat scanning of the placenta wastes time, because ultrasound misses many abruptions and a negative study never excludes one.
- For a patient with acute urinary retention, which of the following is the initial management step?
- Percutaneous aspiration
- Bladder catheterization
- Intravenous antibiotics
- Anticholinergic tablets
Correct answer: Bladder catheterization
Bladder catheterization is the opening move in acute retention, because a urethral catheter drains the distended bladder within minutes, relieves the pain and stops back-pressure injury to the kidneys. Percutaneous aspiration through a suprapubic route is held in reserve for the patient in whom the urethral passage fails or is barred. Intravenous antibiotics treat an infection that may not exist and leave the obstruction untouched. Anticholinergic tablets make retention worse by relaxing the detrusor still further.
- In a patient presenting with pelvic inflammatory disease 'PID', which of the following symptoms most strongly suggests the presence of a tubo-ovarian abscess?
- Dysuria and pain
- Ache and malaise
- Fever and chills
- Nausea and colic
Correct answer: Fever and chills
Fever and chills point to a tubo-ovarian abscess, because a walled-off collection drives a systemic septic response that uncomplicated salpingitis does not produce. Dysuria and pain accompany almost every pelvic infection and say nothing about abscess formation. Nausea and colic follow peritoneal irritation from any source, including simple inflammation. Ache and malaise are too unfocused to separate a collection from ordinary pelvic infection.
- Which of the following is the most appropriate first-line treatment for a pregnant patient with symptomatic cholelithiasis?
- Laparoscopic excision and workup
- Systemic antibiotics and bedrest
- Oral dissolution and observation
- Intravenous fluids and analgesia
Correct answer: Intravenous fluids and analgesia
Intravenous fluids and analgesia is the first-line answer for symptomatic gallstones in pregnancy, because conservative care settles most attacks and spares the fetus exposure to anesthesia and pneumoperitoneum. Laparoscopic excision and workup is reserved for recurrent or complicated disease and is timed for the second trimester when it cannot be avoided. Systemic antibiotics and bedrest treat established cholecystitis with infection, which uncomplicated biliary colic is not. Oral dissolution and observation takes many months to act and has no place in an acute attack.
- A patient presents with severe, colicky right flank pain radiating to the groin, accompanied by microscopic hematuria. Which of the following imaging studies is most appropriate to confirm the diagnosis?
- Noncontrast CT of the abdomen and pelvis
- Radiologic KUB of the kidney and ureters
- Transabdominal US of the flank and groin
- Diffusion MRI of the bladder and urethra
Correct answer: Noncontrast CT of the abdomen and pelvis
A noncontrast CT of the abdomen and pelvis confirms a ureteric stone, because calculi of every composition are dense on unenhanced imaging and the study also shows the level of obstruction and any alternative cause. A transabdominal US of the flank and groin detects hydronephrosis but misses most mid-ureteric calculi. A radiologic KUB of the kidney and ureters records only radio-opaque stones and is defeated by overlying bowel gas. A diffusion MRI of the bladder and urethra resolves soft tissue poorly suited to calcium detection and takes far too long.
- Which of the following findings on a pelvic exam is most indicative of a ruptured ovarian cyst in a patient presenting with acute onset lower abdominal pain?
- Malodorous cervical discharge and bleeding
- Unilateral adnexal tenderness and fullness
- Palpable uterine enlargement and asymmetry
- Anterior vaginal distension and induration
Correct answer: Unilateral adnexal tenderness and fullness
Unilateral adnexal tenderness and fullness is what a ruptured ovarian cyst leaves on examination, because blood and cyst fluid track into one adnexa and make that side tender and boggy while the other side examines cleanly. Malodorous cervical discharge and bleeding indicate ascending infection of the upper tract, not a ruptured cyst. Palpable uterine enlargement and asymmetry describe fibroids or a gravid uterus, neither of which begins with sudden one-sided pain. Anterior vaginal distension and induration arise from the urethra or bladder, well away from the ovary.
- In the setting of acute pyelonephritis, which of the following laboratory findings is most indicative of a complicated infection requiring admission?
- Detected urinary nitrites
- Increased leukocyte count
- Elevated serum creatinine
- Reduced plasma osmolality
Correct answer: Elevated serum creatinine
Elevated serum creatinine marks a complicated pyelonephritis, because impaired excretory function signals obstruction, sepsis or pre-existing renal disease, and each of those demands admission for intravenous therapy and imaging. Detected urinary nitrites merely confirm a gram-negative organism and are present in uncomplicated cases too. Increased leukocyte count accompanies almost every acute infection and does not grade severity. Reduced plasma osmolality reflects dilution or drinking habits and has no bearing on the kidney infection.
- A pregnant patient at 32 weeks gestation presents with sudden onset of severe abdominal pain, vaginal bleeding, and uterine tenderness. The fetal heart rate tracing shows recurrent late decelerations. What is the most likely diagnosis?
- Unnoticed placenta previa
- Silent myometrial rupture
- Ascending renal infection
- Acute placental abruption
Correct answer: Acute placental abruption
Acute placental abruption accounts for every element here: premature separation of the placenta produces painful bleeding, a tender woody uterus and recurrent late decelerations from a failing exchange surface. Unnoticed placenta previa bleeds painlessly and leaves the uterus soft and non-tender. Silent myometrial rupture is possible but almost always follows a previous scar and typically shows loss of contractions with the presenting part receding. Ascending renal infection gives flank pain and rigors without vaginal bleeding or uterine tenderness.
- Which of the following is the initial most appropriate management for a patient with a suspected ectopic pregnancy and hemodynamic instability?
- Rapid fluid resuscitation and blood transfusion
- Single methotrexate injection and serial titers
- Elective tubal salpingostomy and light sedation
- Early transvaginal imaging and ward observation
Correct answer: Rapid fluid resuscitation and blood transfusion
Rapid fluid resuscitation and blood transfusion comes first when a suspected ectopic pregnancy is bleeding and the patient is unstable, because circulating volume has to be restored while the theater team is called. Single methotrexate injection and serial titers is medical management for a small, unruptured, stable ectopic and would be lethal here. Elective tubal salpingostomy and light sedation presumes a stable patient on a planned list. Early transvaginal imaging and ward observation postpones resuscitation in someone who is already collapsing.
- A patient presents with fever, lower abdominal pain, and a tender, palpable mass on the right side of the pelvis. Which of the following is the most likely diagnosis?
- Perforated appendix
- Tuboovarian abscess
- Cystic endometrioma
- Infarcted leiomyoma
Correct answer: Tuboovarian abscess
Tuboovarian abscess explains fever together with a tender, palpable adnexal mass, because ascending pelvic infection walls off pus between the tube and the ovary on one side. Perforated appendix can also raise a right-sided inflammatory mass, but the pain migrates from the umbilicus and the mass lies lateral and low rather than in the adnexa. Cystic endometrioma is tender and cyclical and does not bring fever. Infarcted leiomyoma gives pain and a low-grade temperature, yet the mass is uterine, firm and central.
- Which of the following is the most significant risk factor for ectopic pregnancy?
- Repeated elective cesarean delivery
- Current intrauterine device removal
- Past sexually transmitted infection
- Confirmed nulliparity beyond thirty
Correct answer: Past sexually transmitted infection
Past sexually transmitted infection is the leading risk factor for ectopic implantation, because chlamydial or gonococcal salpingitis scars the tubal lining and destroys the ciliary transport that carries the embryo to the uterus. Repeated elective cesarean delivery scars the uterus rather than the tube and predisposes to a scar pregnancy instead. Current intrauterine device removal leaves no lasting tubal damage once the device is out. Confirmed nulliparity beyond thirty reflects subfertility that may share a cause with tubal disease but is not itself a mechanism.
- In a patient with acute renal colic due to urolithiasis, which of the following medications is most effective for pain management?
- Intramuscular codeine
- Enteral acetaminophen
- Subcutaneous morphine
- Intravenous ketorolac
Correct answer: Intravenous ketorolac
Intravenous ketorolac is the most effective drug in renal colic, because a parenteral anti-inflammatory cuts the prostaglandin-driven ureteric spasm and renal pelvic pressure that generate the pain rather than merely dulling its perception. Subcutaneous morphine eases pain without lowering intraluminal pressure and adds nausea, sedation and dependence risk. Intramuscular codeine is a weak opioid with erratic absorption and the same drawbacks. Enteral acetaminophen is too weak for colic of this severity and is poorly absorbed in a vomiting patient.
- A patient presents with acute agitation, dilated pupils, tachycardia, and hallucinations after attending a music festival. Which substance is most likely responsible for these symptoms?
- Cocaine
- Ethanol
- Opiates
- Solvent
Correct answer: Cocaine
Cocaine produces exactly this sympathomimetic picture: agitation, mydriasis, tachycardia and hallucinations follow blockade of monoamine reuptake and a flood of central catecholamines. Ethanol sedates, dilates no pupils and causes hallucinations only in withdrawal, which does not fit a patient who has just been at a festival. Opiates give pinpoint pupils, bradycardia and respiratory depression, the mirror image of this presentation. Solvent inhalation causes brief euphoria and ataxia that fade within minutes rather than sustained tachycardia with dilated pupils.
- A 25-year-old patient is brought to the emergency department with severe, sudden-onset chest pain radiating to the back. The patient has a history of Marfan syndrome. Which of the following is the most likely diagnosis?
- Coronary ischemia
- Aortic dissection
- Pulmonary embolus
- Esophageal reflux
Correct answer: Aortic dissection
Aortic dissection is the diagnosis, because Marfan syndrome weakens the aortic media and tearing pain that strikes at maximum intensity and radiates through to the back is its classic presentation in a young patient. Coronary ischemia is vanishingly rare at twenty-five without other risk factors and gives crushing pain that does not bore through to the back. Pulmonary embolus causes pleuritic pain with breathlessness and hypoxia rather than an interscapular tearing sensation. Esophageal reflux burns behind the sternum, builds gradually and eases with antacids.
- An emergency nurse is assessing a patient who reports a feeling of hopelessness and has been diagnosed with major depressive disorder. Which of the following questions is MOST important to assess suicide risk?
- "Have you attempted suicide a month prior?"
- "Do you have neighbors to prevent suicide?"
- "How long have you resisted suicide urges?"
- "Have you devised a detailed suicide plan?"
Correct answer: "Have you devised a detailed suicide plan?"
The question that grades imminent risk is "Have you devised a detailed suicide plan?", because a formulated plan with a chosen method and access to it is what converts ideation into immediate danger and sets the level of observation. Asking whether the patient attempted suicide a month prior records past history, which raises long-term risk but does not measure danger tonight. Asking whether neighbors are available to prevent suicide surveys support rather than lethality. Asking how long the patient has resisted suicide urges captures duration, which does not grade the immediacy of the threat.
- A patient with schizophrenia is experiencing severe agitation and aggression in the emergency department. Which of the following medications is most appropriate for rapid tranquilization?
- Haloperidol, potent butyrophenone neuroleptic
- Lorazepam, injectable benzodiazepine sedative
- Fluoxetine, daily serotonergic antidepressant
- Lithium, preventive antimanic pharmacotherapy
Correct answer: Haloperidol, potent butyrophenone neuroleptic
Haloperidol, potent butyrophenone neuroleptic, is the agent for rapid tranquilization in psychotic agitation because dopamine blockade controls the aggression as well as the arousal. Lorazepam, injectable benzodiazepine sedative, blunts arousal but leaves the psychosis untreated and can disinhibit an aggressive patient. Fluoxetine, daily serotonergic antidepressant, needs weeks of dosing and has no acute effect. Lithium, preventive antimanic pharmacotherapy, is a bipolar maintenance salt and is useless for an emergency behavioral crisis.
- In the emergency department, a patient presents with symptoms of severe dehydration and history of an eating disorder. Laboratory tests reveal hypokalemia and metabolic alkalosis. Which eating disorder is most consistent with these findings?
- Anorexia, restricting food intake routinely
- Bulimia nervosa, purging gastric secretions
- Binge eating disorder, lacking compensation
- Pica, craving nonnutritive foreign material
Correct answer: Bulimia nervosa, purging gastric secretions
Bulimia nervosa, purging gastric secretions, fits hypokalemia with metabolic alkalosis because repeated vomiting strips hydrogen and potassium out of the body. Anorexia, restricting food intake routinely, causes wasting and bradycardia and tends toward acidosis, not alkalosis. Binge eating disorder, lacking compensation, involves no purge and therefore no acid or potassium loss. Pica, craving nonnutritive foreign material, risks obstruction and lead exposure rather than this electrolyte pattern.
- A patient presents with symptoms of severe abdominal pain, vomiting, constipation, and psychiatric disturbances. Which of the following conditions should the emergency nurse suspect?
- Biliary pancreatitis, abrupt trypsin enzyme activation
- Irritable bowel syndrome, altered visceral nociception
- Acute intermittent porphyria, defective heme synthesis
- Appendicitis, obstructed lumen with bacterial invasion
Correct answer: Acute intermittent porphyria, defective heme synthesis
Acute intermittent porphyria, defective heme synthesis, is the condition that unites severe abdominal pain, vomiting, constipation and psychiatric disturbance, because the accumulated porphyrin precursors are neurotoxic. Biliary pancreatitis, abrupt trypsin enzyme activation, gives epigastric pain boring to the back with no neuropsychiatric feature. Irritable bowel syndrome, altered visceral nociception, produces cramping and altered stools without vomiting or psychosis. Appendicitis, obstructed lumen with bacterial invasion, localizes to the right lower quadrant and does not disturb mental state.
- A 40-year-old patient presents with unilateral, pulsating headache with nausea and photophobia. The patient reports that the headache worsens with physical activity. Which of the following is the most appropriate initial management?
- Oxygen therapy, sustained high-flow nonrebreather
- Intravenous fluids, balanced crystalloid infusion
- Acetaminophen, weak central analgesic antipyretic
- Sumatriptan, selective serotonin receptor agonist
Correct answer: Sumatriptan, selective serotonin receptor agonist
Sumatriptan, selective serotonin receptor agonist, is the initial management of this migraine because it constricts dilated cranial vessels and shuts down neurogenic inflammation. Oxygen therapy, sustained high-flow nonrebreather, aborts cluster headache and does nothing for migraine. Intravenous fluids, balanced crystalloid infusion, correct dehydration but leave the headache untouched. Acetaminophen, weak central analgesic antipyretic, rarely relieves an attack severe enough to worsen with physical activity.
- An emergency nurse is assessing a patient who reports hearing voices telling him to harm others. The patient is diagnosed with acute psychosis. Which of the following is the MOST appropriate next step?
- Involuntary psychiatric hold certification
- Quiet supportive environmental reassurance
- Oral neuroleptic medication administration
- Outpatient psychiatry referral appointment
Correct answer: Involuntary psychiatric hold certification
Involuntary psychiatric hold certification is the next step, because a patient acting under command hallucinations to harm others cannot be permitted to leave and must be detained for assessment and treatment. Quiet supportive environmental reassurance lowers stimulation but creates no legal authority to keep a dangerous patient present. Oral neuroleptic medication administration treats symptoms yet depends on a cooperation this patient has not given. Outpatient psychiatry referral appointment postpones care and leaves a homicidal patient unsupervised in the community.
- A patient presents with rapid onset of palpitations, chest discomfort, and shortness of breath. The ECG shows a narrow complex tachycardia with a heart rate of 180 bpm. Which of the following is the most appropriate initial management?
- Cardioversion, synchronized biphasic external shock
- Adenosine, transient atrioventricular node blockade
- Metoprolol, protracted beta adrenoceptor antagonism
- Oxygen, humidified nonrebreather reservoir delivery
Correct answer: Adenosine, transient atrioventricular node blockade
Adenosine, transient atrioventricular node blockade, is the initial management of a stable narrow complex tachycardia because it interrupts the reentrant circuit and usually restores sinus rhythm within seconds. Cardioversion, synchronized biphasic external shock, is held back for the patient who is hypotensive or obtunded, which this one is not. Metoprolol, protracted beta adrenoceptor antagonism, acts far too slowly and can drop an already borderline pressure. Oxygen, humidified nonrebreather reservoir delivery, treats hypoxia, which is not what is driving the arrhythmia.
- In the emergency department, a patient presents with dry mucous membranes, sunken eyes, and decreased skin turgor. The nurse notes a rapid pulse and low blood pressure. Which of the following is the most appropriate initial treatment?
- Oral rehydration fluid, repeatedly swallowed
- Blood transfusion, packed erythrocyte volume
- Intravenous isotonic saline, prompt infusion
- Dextrose solution, hypotonic water expansion
Correct answer: Intravenous isotonic saline, prompt infusion
Intravenous isotonic saline, prompt infusion, is the initial treatment because dry mucous membranes with tachycardia and hypotension mean the circulating space is already depleted and needs refilling now. Oral rehydration fluid, repeatedly swallowed, is far too slow once perfusion has failed and splanchnic absorption is poor. Blood transfusion, packed erythrocyte volume, replaces red cells this patient has not lost. Dextrose solution, hypotonic water expansion, distributes into the cells and fails to hold the vascular compartment.
- A patient presents to the emergency department with a high fever, headache, stiff neck, and photophobia. Which of the following is the most likely diagnosis?
- Viral gastroenteritis, febrile enteric inflammation
- Migraine, unilateral neurovascular headache pattern
- Encephalitis, cerebral parenchymal cortical lesions
- Meningitis, inflamed leptomeningeal membrane layers
Correct answer: Meningitis, inflamed leptomeningeal membrane layers
Meningitis, inflamed leptomeningeal membrane layers, is the likely diagnosis because high fever, headache, nuchal rigidity and photophobia together point to meningeal irritation demanding urgent cultures and antibiotics. Viral gastroenteritis, febrile enteric inflammation, causes vomiting and cramping without a stiff neck. Migraine, unilateral neurovascular headache pattern, brings photophobia but neither fever nor nuchal rigidity. Encephalitis, cerebral parenchymal cortical lesions, presents with altered consciousness, seizures and focal deficits rather than isolated meningeal signs.
- A patient with a known history of bipolar disorder presents in the manic phase with grandiose delusions and a markedly elevated mood. Which of the following medications is most appropriate to manage mania in this patient?
- Lithium carbonate, antimanic affective stabilizer
- Sertraline, selective serotonin reuptake blockade
- Diazepam, oral benzodiazepine anxiolytic sedative
- Haloperidol, chronic dopamine receptor antagonism
Correct answer: Lithium carbonate, antimanic affective stabilizer
Lithium carbonate, antimanic affective stabilizer, is the medication that manages mania in bipolar disorder because it suppresses the elevated affect, grandiosity and hyperactivity at their source. Sertraline, selective serotonin reuptake blockade, is an antidepressant that can precipitate or prolong a manic swing. Diazepam, oral benzodiazepine anxiolytic sedative, quiets agitation while leaving the manic process running. Haloperidol, chronic dopamine receptor antagonism, controls psychotic features as an adjunct but never stabilizes the underlying illness.
- A patient presents to the emergency department with symptoms of confusion, ataxia, and ophthalmoplegia. The nurse suspects a deficiency in which of the following vitamins?
- Cobalamin, water-soluble erythrocytic cofactor
- Thiamine, water-soluble transketolase cofactor
- Pyridoxine, water-soluble transferase cofactor
- Niacin, water-soluble dehydrogenation cofactor
Correct answer: Thiamine, water-soluble transketolase cofactor
Thiamine, water-soluble transketolase cofactor, is the deficient nutrient, because confusion with ataxia and ophthalmoplegia is the triad of Wernicke encephalopathy seen in alcohol use disorder. Cobalamin, water-soluble erythrocytic cofactor, is lacking in megaloblastic anemia with posterior column loss, a slower and different picture. Pyridoxine, water-soluble transferase cofactor, runs low in isoniazid therapy and causes neuropathy and seizures. Niacin, water-soluble dehydrogenation cofactor, is deficient in pellagra, which brings dermatitis and diarrhea alongside dementia.
- In the emergency department, a patient presents with sudden onset of palpitations, chest pain, and a sensation of fainting. The patient's ECG reveals a wide complex tachycardia. What is the most appropriate first-line treatment?
- Intravenous adenosine, transient conduction arrest
- Daily metoprolol, gradual adrenoceptor suppression
- Synchronized cardioversion, rapid electrical shock
- Amiodarone infusion, slow antiarrhythmic titration
Correct answer: Synchronized cardioversion, rapid electrical shock
Synchronized cardioversion, rapid electrical shock, is the first-line treatment, because a wide complex tachycardia with chest pain and near syncope is handled electrically rather than pharmacologically. Intravenous adenosine, transient conduction arrest, acts at the atrioventricular node and will not terminate a ventricular rhythm. Daily metoprolol, gradual adrenoceptor suppression, is far too slow and drops the pressure further. Amiodarone infusion, slow antiarrhythmic titration, takes many minutes and is kept for the patient who stays stable.
- A patient with a known history of heart failure is brought to the emergency department with worsening dyspnea, orthopnea, and bilateral pedal edema. Which of the following medications should be administered first?
- Enteral enalapril, steady afterload vasodilatation
- Nebulized albuterol, bronchodilator symptom relief
- Oral digoxin, cardiotonic glycoside digitalization
- Intravenous furosemide, preload reduction diuresis
Correct answer: Intravenous furosemide, preload reduction diuresis
Intravenous furosemide, preload reduction diuresis, is given first in acute decompensated heart failure because it unloads the congested circulation and relieves dyspnea, orthopnea and pedal edema within minutes. Enteral enalapril, steady afterload vasodilatation, is a maintenance agent whose onset is far too slow for acute pulmonary congestion. Nebulized albuterol, bronchodilator symptom relief, treats airway narrowing the patient does not have and adds tachycardia to a failing heart. Oral digoxin, cardiotonic glycoside digitalization, controls rate over days and removes none of the fluid.
- A patient presents with severe abdominal pain, distention, and vomiting. X-ray shows air under the diaphragm. Which of the following is the most likely diagnosis?
- Perforated peptic ulcer, free pneumoperitoneum
- Alcoholic pancreatitis, severe epigastric pain
- Bowel obstruction, distended proximal segments
- Cholecystitis, right upper quadrant tenderness
Correct answer: Perforated peptic ulcer, free pneumoperitoneum
Perforated peptic ulcer, free pneumoperitoneum, is the diagnosis, because air under the diaphragm means a hollow viscus has ruptured and the patient needs urgent surgery. Alcoholic pancreatitis, severe epigastric pain, raises lipase but never releases free intraperitoneal air. Bowel obstruction, distended proximal segments, shows air-fluid levels held inside the gut lumen rather than outside it. Cholecystitis, right upper quadrant tenderness, thickens the gallbladder wall without perforating into the peritoneum.
- A patient with a history of intravenous drug use presents with fever, night sweats, weight loss, and a cough producing bloody sputum. Which of the following should be most highly suspected?
- Bacterial pneumonia, lobar alveolar consolidation
- Reactivation tuberculosis, apical lobe cavitation
- Tricuspid endocarditis, multiple pulmonary emboli
- Bronchogenic carcinoma, endobronchial mass lesion
Correct answer: Reactivation tuberculosis, apical lobe cavitation
Reactivation tuberculosis, apical lobe cavitation, is the suspicion to act on, because fever with night sweats, weight loss and bloody sputum in an injection drug user demands airborne isolation and sputum testing. Bacterial pneumonia, lobar alveolar consolidation, declares itself over days with rigors rather than weeks of wasting. Tricuspid endocarditis, multiple pulmonary emboli, causes fever and pleuritic pain in the same population but not chronic weight loss with cavitary sputum. Bronchogenic carcinoma, endobronchial mass lesion, can bleed but does not explain drenching night sweats in a young user.
- An emergency nurse is assessing a patient with suspected carbon monoxide poisoning. Which of the following is the most appropriate diagnostic test?
- Arterial gases, dissolved oxygen quantification
- Pulse oximetry, deceptively elevated saturation
- Carboxyhemoglobin level, direct oximetric assay
- Chest radiograph, diffuse pulmonary infiltrates
Correct answer: Carboxyhemoglobin level, direct oximetric assay
Carboxyhemoglobin level, direct oximetric assay, is the diagnostic test, because only a co-oximeter reports the fraction of hemoglobin actually bound by carbon monoxide. Arterial gases, dissolved oxygen quantification, measure the gas carried in plasma and stay reassuring while hemoglobin is poisoned. Pulse oximetry, deceptively elevated saturation, cannot separate carboxyhemoglobin from oxyhemoglobin and misreads the patient as well. Chest radiograph, diffuse pulmonary infiltrates, appears only in severe exposure and never confirms the exposure itself.
- A patient presents with high fever, severe headache, and a petechial rash that started on the ankles and wrists and is spreading to the trunk. Which of the following diseases should be suspected?
- Borreliosis, Borrelia burgdorferi erythema migrans fever
- Meningococcemia, abrupt Neisseria purpuric lesions fever
- Ehrlichiosis, Ehrlichia chaffeensis sparse macules fever
- Rocky Mountain spotted fever, rickettsial perivasculitis
Correct answer: Rocky Mountain spotted fever, rickettsial perivasculitis
Rocky Mountain spotted fever, rickettsial perivasculitis, is the disease to suspect, because a petechial eruption that begins on the wrists and ankles and travels centrally with high fever and severe headache is the classic centripetal pattern, and doxycycline should not wait for serology. Borreliosis, Borrelia burgdorferi erythema migrans fever, produces one spreading annular lesion with little systemic upset and no petechiae. Meningococcemia, abrupt Neisseria purpuric lesions fever, begins centrally and collapses the patient within hours rather than marching inward from the limbs. Ehrlichiosis, Ehrlichia chaffeensis sparse macules fever, gives cytopenias with scant or absent rash, not a wrist and ankle petechial eruption.
- A patient presents with acute onset of flank pain, hematuria, and nausea. The emergency nurse should suspect which of the following conditions?
- Renal calculus, obstructive ureteral concretion
- Pyelonephritis, febrile upper urinary infection
- Bacterial cystitis, frequent mucosal irritation
- Appendicitis, migratory somatic peritoneal pain
Correct answer: Renal calculus, obstructive ureteral concretion
Renal calculus, obstructive ureteral concretion, is the condition to suspect, because sudden colicky flank pain with hematuria and nausea is the signature of a stone lodged in the ureter. Pyelonephritis, febrile upper urinary infection, brings rigors and costovertebral tenderness with a steady ache rather than waves of colic. Bacterial cystitis, frequent mucosal irritation, causes suprapubic burning and urgency without flank radiation. Appendicitis, migratory somatic peritoneal pain, settles in the right lower quadrant and seldom produces blood in the urine.
- In the management of a patient with a suspected orbital blowout fracture, which of the following actions is most appropriate?
- Application of firm bilateral pressure patches
- Avoidance of forceful nasal expiration efforts
- Delivery of systemic intravenous steroid doses
- Encouragement of vigorous sinus clot expulsion
Correct answer: Avoidance of forceful nasal expiration efforts
Avoidance of forceful nasal expiration efforts is the action to take, because blowing the nose or sneezing drives air through the fractured orbital floor and produces orbital emphysema with rising pressure behind the eye. Application of firm bilateral pressure patches raises intraorbital pressure and blinds the team to any change in vision. Delivery of systemic intravenous steroid doses has no established place in the first hours of a blowout fracture. Encouragement of vigorous sinus clot expulsion is exactly the maneuver that forces air into the orbit and worsens the injury.
- When evaluating a patient with a chemical eye injury, what is the initial step in management?
- Instillation with cold topical anesthetic drops
- Neutralization with a buffered chemical washout
- Irrigation with copious isotonic saline volumes
- Documentation with a baseline visual assessment
Correct answer: Irrigation with copious isotonic saline volumes
Irrigation with copious isotonic saline volumes is the initial step, because diluting and washing the agent out of the conjunctival sac limits how deep the burn goes and every minute of delay costs tissue. Instillation with cold topical anesthetic drops can make flushing tolerable but delays it when done first. Neutralization with a buffered chemical washout is contraindicated, since the acid-base reaction generates heat and deepens the injury. Documentation with a baseline visual assessment belongs in the record but must never precede flushing the eye.
- Which of the following is the most appropriate management for a patient with a suspected compartment syndrome in the lower leg?
- Tight bandage, circumferential external compression
- Extremity elevation, passive gravitational drainage
- Cold compresses, cutaneous surface vasoconstriction
- Emergency fasciotomy, prompt surgical decompression
Correct answer: Emergency fasciotomy, prompt surgical decompression
Emergency fasciotomy, prompt surgical decompression, is the management, because only opening the fascia releases the pressure that is strangling muscle and nerve inside a closed space. Tight bandage, circumferential external compression, raises that pressure further and hastens muscle death. Extremity elevation, passive gravitational drainage, lowers arterial inflow pressure and reduces perfusion of the threatened muscle. Cold compresses, cutaneous surface vasoconstriction, cut blood supply to tissue that is already ischemic.
- In patients with facial fractures, what is the primary reason for ensuring patency of the airway?
- Mitigation of acute airway obstruction
- Prevention of aspirated airway content
- Reduction of swollen airway structures
- Correction of obstructive airway apnea
Correct answer: Mitigation of acute airway obstruction
Mitigation of acute airway obstruction is the primary reason, because bleeding, edema and displaced facial bone can close the upper airway within minutes after a facial fracture. Prevention of aspirated airway content is a real benefit but follows from a secured airway rather than being the reason to secure it. Reduction of swollen airway structures describes a treatment goal, not the rationale for maintaining patency. Correction of obstructive airway apnea belongs to chronic sleep-disordered breathing and has no bearing on acute trauma.
- What is the most appropriate management for a patient presenting with an open fracture of the tibia?
- Tight proximal tourniquet with prolonged compression
- Intravenous antibiotics with tetanus toxoid coverage
- Emergency department realignment with immediate cast
- Direct heat application with circulatory stimulation
Correct answer: Intravenous antibiotics with tetanus toxoid coverage
Intravenous antibiotics with tetanus toxoid coverage is the management of an open tibial fracture, because the bone is exposed to environmental contamination and infection is the complication that costs the limb. Tight proximal tourniquet with prolonged compression is reserved for uncontrolled arterial bleeding and causes ischemic damage when applied routinely. Emergency department realignment with immediate cast risks further soft tissue and neurovascular harm and hides the wound from inspection. Direct heat application with circulatory stimulation has no role and encourages bacterial growth in a contaminated wound.
- A patient presents with a laceration over the metacarpophalangeal joint of the hand. What is the most significant concern in this type of injury?
- Cosmetic concern, unsightly scar disfigurement
- Flexor tendon transection, persistent weakness
- Bacterial inoculation, deep purulent arthritis
- Permanent stiffness, restricted joint mobility
Correct answer: Bacterial inoculation, deep purulent arthritis
Bacterial inoculation, deep purulent arthritis, is the most significant concern, because a laceration over the knuckle is a clenched-fist bite until proved otherwise and oral flora are driven into the joint space. Cosmetic concern, unsightly scar disfigurement, is trivial beside an infection that can destroy the hand. Flexor tendon transection, persistent weakness, would show as loss of active bending, which this presentation does not describe, and the tendons at risk here are on the extensor surface. Permanent stiffness, restricted joint mobility, is a late consequence of untreated sepsis rather than the immediate danger.
- What is the primary reason for immobilizing the spine in a patient with multiple trauma and suspected spinal injury?
- Alleviation of intense positional pain
- Facilitation of safe patient transport
- Promotion of early assisted ambulation
- Prevention of secondary cord contusion
Correct answer: Prevention of secondary cord contusion
Prevention of secondary cord contusion is the primary reason for immobilizing the spine, because an unstable segment that shifts can bruise neural tissue that survived the original impact. Alleviation of intense positional pain is a welcome side effect but is not why immobilization is applied. Facilitation of safe patient transport is a practical convenience that does not explain the neurological priority. Promotion of early assisted ambulation is the opposite of what immobilization sets out to achieve.
- When managing a wound with significant soft tissue damage, which factor is most crucial in preventing infection?
- Thorough debridement of nonviable fragments
- Immediate definitive closure of lacerations
- Topical application of antibiotic dressings
- Preventive delivery of systemic antibiotics
Correct answer: Thorough debridement of nonviable fragments
Thorough debridement of nonviable fragments is the crucial factor, because dead material feeds bacteria and no drug reaches an avascular bed. Immediate definitive closure of lacerations seals that contamination inside and converts a dirty wound into an abscess. Topical application of antibiotic dressings treats the surface while the deep necrotic bed keeps seeding infection. Preventive delivery of systemic antibiotics supplements surgery but cannot substitute for cutting the dead material away.
- For a patient with a chemical burn to the hand, which treatment is essential to prevent contractures?
- Immediate coverage with autologous grafts
- Physiotherapy with early motion exercises
- Surface treatment with chilled compresses
- Sustained elevation with rigid immobility
Correct answer: Physiotherapy with early motion exercises
Physiotherapy with early motion exercises is essential to prevent contracture, because a healing burn across the hand shortens unless every joint is carried through its full arc each day. Immediate coverage with autologous grafts closes the defect but by itself does nothing to preserve joint excursion. Surface treatment with chilled compresses belongs to the first minutes of cooling and has no bearing on later function. Sustained elevation with rigid immobility controls swelling while guaranteeing the very stiffness the question asks about.
- What is the most effective initial management strategy for an anterior shoulder dislocation?
- Prolonged brace immobilization, delayed mobilization
- Scheduled operative repair, prosthetic stabilization
- Immediate closed reduction, nonoperative realignment
- Systemic corticosteroid injection, analgesic therapy
Correct answer: Immediate closed reduction, nonoperative realignment
Immediate closed reduction, nonoperative realignment, is the most effective initial strategy for an anterior shoulder dislocation, because seating the humeral head back in the glenoid relieves pain at once and protects the axillary nerve from traction. Prolonged brace immobilization, delayed mobilization, leaves the joint dislocated and invites permanent damage. Scheduled operative repair, prosthetic stabilization, is reserved for irreducible or recurrent cases and does nothing today. Systemic corticosteroid injection, analgesic therapy, addresses neither the displacement nor its consequences.
- In the management of a patient with a globe laceration, which of the following is the most appropriate next step?
- Occlusive pressure patch for orbital compression
- Oral antibiotic therapy for infection prevention
- Topical mydriatic drops for pupillary dilatation
- Urgent operative referral for ophthalmic closure
Correct answer: Urgent operative referral for ophthalmic closure
Urgent operative referral for ophthalmic closure is the next step for a lacerated globe, because the eye has to be explored and repaired in theater before contents extrude or endophthalmitis sets in. Occlusive pressure patch for orbital compression is dangerous and can express intraocular contents through the wound. Oral antibiotic therapy for infection prevention is an adjunct that never substitutes for surgical closure. Topical mydriatic drops for pupillary dilatation add nothing and risk further contamination of an open eye.
- Which of the following diagnostic tools is most accurate for identifying a scaphoid fracture in the initial assessment following trauma?
- MRI, earliest marrow edema detection
- CT, finer trabecular bone resolution
- US, dynamic tendon sheath assessment
- PA radiograph, initial cortical view
Correct answer: MRI, earliest marrow edema detection
MRI, earliest marrow edema detection, is the most accurate tool for a suspected scaphoid fracture, because it shows the bruise inside the bone on the day of injury when every other study is still blank. CT, finer trabecular bone resolution, maps a known fracture line beautifully yet misses the occult injury that has no cortical break. US, dynamic tendon sheath assessment, images soft tissue and cannot exclude a break in the carpus. PA radiograph, initial cortical view, is the usual first film but reads as clear in a large share of true fractures.
- For a patient with a suspected mandibular fracture, which clinical feature most strongly suggests the presence of this injury?
- Trismus, intractable masseteric restriction
- Malocclusion, uneven dental interdigitation
- Infraorbital numbness, midfacial anesthesia
- Subconjunctival hemorrhage, scleral redness
Correct answer: Malocclusion, uneven dental interdigitation
Malocclusion, uneven dental interdigitation, most strongly suggests a mandibular fracture, because the patient notices immediately that the teeth no longer meet as they did and that finding tracks the displaced jaw segment. Trismus, intractable masseteric restriction, follows many facial injuries and dental infections and is not specific to a break. Infraorbital numbness, midfacial anesthesia, points to the orbital floor and maxilla rather than the mandible. Subconjunctival hemorrhage, scleral redness, indicates orbital or globe trauma and says nothing about the jaw.
- When treating a patient with a full-thickness burn, which intervention is most critical to prevent hypothermic shock?
- Performance of early truncal escharotomy
- Infusion of measured crystalloid volumes
- Preservation of high ambient temperature
- Application of silver sulfadiazine cream
Correct answer: Preservation of high ambient temperature
Preservation of high ambient temperature is the intervention that prevents hypothermic shock, because a full-thickness burn has lost the skin barrier and radiates heat continuously into a cool room. Performance of early truncal escharotomy relieves a constricting eschar but exposes more surface and speeds heat loss. Infusion of measured crystalloid volumes restores circulating volume yet chills the patient further unless the fluid itself is warmed. Application of silver sulfadiazine cream limits bacterial colonization and has no thermal benefit.
- Which of the following signs is most indicative of a basilar skull fracture?
- Hemotympanum, clotted blood behind tympanum
- Linear vault fracture, radiographic outline
- Nasal deviation, displaced septal cartilage
- Periorbital ecchymosis, paired raccoon eyes
Correct answer: Periorbital ecchymosis, paired raccoon eyes
Periorbital ecchymosis, paired raccoon eyes, is the sign most indicative of a basilar skull fracture, appearing as bruising confined to both eyelids in a patient with no direct blow to the orbits. Hemotympanum, clotted blood behind tympanum, accompanies petrous injury and is suggestive, but it also follows simple temporal trauma and is far less specific than the symmetrical periorbital pattern. Linear vault fracture, radiographic outline, describes the convexity of the skull rather than its base. Nasal deviation, displaced septal cartilage, marks an isolated nasal injury only.
- In the assessment of a patient with an ankle sprain, which grading system is used to classify the severity of ligament injury?
- West Point ankle functional grading criteria
- Ottawa Ankle imaging exclusion grading rules
- Kleiger External rotation ankle grading test
- Lachman Anterior drawer ankle grading method
Correct answer: West Point ankle functional grading criteria
West Point ankle functional grading criteria is the system used to classify ligament injury severity in a sprain, sorting it into three grades by tenderness, swelling and the ability to bear weight. Ottawa Ankle imaging exclusion grading rules decide who needs a radiograph and assign no severity at all. Kleiger External rotation ankle grading test screens for syndesmotic disruption rather than grading a lateral ligament. Lachman Anterior drawer ankle grading method belongs to knee examination and grades nothing in the ankle.
- What is the primary concern in the initial evaluation of a patient with a chemical burn to the eye?
- Assessing the corneal epithelial abrasions
- Determining the contaminating substance pH
- Measuring the resting intraocular pressure
- Recording the presenting visual impairment
Correct answer: Determining the contaminating substance pH
Determining the contaminating substance pH is the primary concern of the initial evaluation, because alkali burn deeply by liquefactive necrosis while acids coagulate and self-limit, and the reading is what tells the team when flushing may finally stop. Assessing the corneal epithelial abrasions comes after the surface has been washed and the reading has normalized. Measuring the resting intraocular pressure is unsafe and unhelpful on a freshly injured cornea. Recording the presenting visual impairment is necessary documentation but steers none of the emergency treatment.
- Which intervention is most critical in the initial management of a patient with a suspected pelvic fracture and hemodynamic instability?
- Emergency laparotomy, immediate pelvic exploration
- Broad-spectrum antibiotics, pelvic sepsis coverage
- Pelvic binder, circumferential volume minimization
- Skeletal traction, longitudinal pelvic realignment
Correct answer: Pelvic binder, circumferential volume minimization
Pelvic binder, circumferential volume minimization, is the most critical initial intervention, because closing the ring shrinks the space the hematoma can fill, tamponades the venous plexus and slows the bleeding that is killing the patient. Emergency laparotomy, immediate pelvic exploration, releases the retroperitoneal tamponade and makes the bleeding worse as a first move. Broad-spectrum antibiotics, pelvic sepsis coverage, treat a complication that has not yet arisen. Skeletal traction, longitudinal pelvic realignment, is for femoral shaft injuries and does nothing for ring instability.
- When assessing a patient with a suspected Le Fort fracture, which clinical sign is most indicative of a Le Fort III fracture?
- Malocclusion of the posterior tooth arch
- Epistaxis of the anterior septal vessels
- Otorrhea of the clear cerebrospinal leak
- Mobility of the entire maxillary midface
Correct answer: Mobility of the entire maxillary midface
Mobility of the entire maxillary midface is the sign most indicative of a Le Fort III fracture, because the facial skeleton has separated from the cranial base and shifts as one block when the forehead is held still. Malocclusion of the posterior tooth arch appears at every Le Fort level and in mandibular fracture, so it cannot identify which level is involved. Epistaxis of the anterior septal vessels follows almost any midface blow. Otorrhea of the clear cerebrospinal leak marks a basilar skull fracture rather than the level of the facial separation.
- For a patient with a traumatic amputation of a finger, which action is most critical for the preservation of the amputated part?
- Moist gauze wrap, waterproof bag, indirect cooling
- Dry gauze wrap, unsealed container, steady warming
- Gauze wrap, direct iced immersion, prompt freezing
- Gauze wrap, warm pocket transport, rushed handling
Correct answer: Moist gauze wrap, waterproof bag, indirect cooling
Moist gauze wrap, waterproof bag, indirect cooling is the critical action, because moisture keeps the severed digit from drying out, the sealed bag holds it clear of the melt water, and cold applied through that bag slows metabolism without ice damage. Dry gauze wrap, unsealed container, steady warming desiccates the segment and lets it reach a temperature at which it autolyses. Gauze wrap, direct iced immersion, prompt freezing produces crystal injury that macerates tissue so it can no longer be joined. Gauze wrap, warm pocket transport, rushed handling supplies no cooling whatever and leaves nothing worth reattaching.
- A patient presents with symptoms of sweating, salivation, and miosis after exposure to an unknown substance. Which of the following is the most likely causative agent?
- Cyanide, cellular oxidative phosphorylation failure
- Organophosphates, acute cholinesterase enzyme block
- Carbon monoxide, hemoglobin saturation displacement
- Methanol, formaldehyde formate progressive acidosis
Correct answer: Organophosphates, acute cholinesterase enzyme block
Organophosphates, acute cholinesterase enzyme block, is the likely agent, because stopping that enzyme floods muscarinic receptors with acetylcholine and produces sweating, salivation and pinpoint pupils together. Cyanide, cellular oxidative phosphorylation failure, causes sudden collapse with flushed skin and wide pupils rather than a cholinergic flood. Carbon monoxide, hemoglobin saturation displacement, gives headache and confusion with no glandular secretion. Methanol, formaldehyde formate progressive acidosis, blurs vision and drives an anion gap picture, and it dilates rather than constricts the pupil.
- Which of the following best describes the initial management of a patient with severe hypothermia and cardiac instability?
- Application of active superficial rewarmers
- Arrangement of passive insulative coverings
- Administration of warmed intravenous fluids
- Delivery of immediate transvenous pacemaker
Correct answer: Administration of warmed intravenous fluids
Administration of warmed intravenous fluids is the initial management of severe hypothermia with cardiac instability, because raising the core temperature is what restores myocardial function, and it can run alongside every other resuscitation measure. Application of active superficial rewarmers heats the shell first and can return cold acidotic blood to the heart. Arrangement of passive insulative coverings merely conserves heat a cold patient can no longer generate. Delivery of immediate transvenous pacemaker wires irritates a cold myocardium and can trigger ventricular fibrillation.
- A patient presents with acute arsenic poisoning. Which of the following is the most appropriate initial treatment?
- Dimercaprol
- Pralidoxime
- Deferiprone
- Bicarbonate
Correct answer: Dimercaprol
Dimercaprol is the chelating agent started first in acute arsenic poisoning; its two thiol groups bind trivalent arsenic and the complex is cleared in urine, and it can be given intramuscularly while the gut is still being decontaminated. Pralidoxime reactivates acetylcholinesterase after organophosphate exposure and has no binding affinity for a heavy metal. Deferiprone is an oral iron chelator whose donor atoms are oxygen based, so it leaves arsenic untouched. Bicarbonate alkalinizes serum in sodium channel blockade and salicylate poisoning but removes no arsenic from tissue.
- In managing a patient with a black widow spider bite, which of the following is the most effective treatment?
- Ketorolac
- Antivenom
- Cefazolin
- Cortisone
Correct answer: Antivenom
Antivenom is the most effective treatment for a black widow bite because it neutralizes alpha latrotoxin and reverses the rigidity, hypertension and autonomic storm that other measures only blunt. Ketorolac supplies analgesia but leaves circulating toxin active, so severe envenomation keeps progressing. Cefazolin treats bacterial infection, and latrodectism is a pure toxin syndrome with no bacterial component to cover. Cortisone has no action against a presynaptic neurotoxin and does not shorten the illness.
- A patient presents with acute onset of fever, headache, and a petechial rash after cleaning an old storage shed. What is the most likely diagnosis?
- Early histoplasmosis exposure
- Serious leptospirosis illness
- Hantavirus pulmonary syndrome
- Inhalational anthrax prodrome
Correct answer: Hantavirus pulmonary syndrome
Hantavirus pulmonary syndrome is the diagnosis to work from: sweeping out a long closed shed aerosolizes dried rodent excreta, and the illness opens with fever, headache and myalgia before capillary leak floods the lungs. Early histoplasmosis exposure follows disturbed bird or bat guano and produces a granulomatous pneumonitis with hilar nodes, not this abrupt febrile picture. Serious leptospirosis illness needs mucosal or broken skin contact with rodent urine in standing water rather than inhaled dust, and it runs with conjunctival suffusion and renal failure. Inhalational anthrax prodrome arises from spores in animal hides and widens the mediastinum on imaging, a finding absent here.
- Which of the following agents is most likely to cause a cherry red skin coloration in a poisoned patient?
- Inhaled cyanide
- Benzocaine gels
- Malathion vapor
- Carbon monoxide
Correct answer: Carbon monoxide
Carbon monoxide is the agent classically tied to cherry red skin, because carboxyhemoglobin is a bright red pigment that shows through skin and mucous membranes. Inhaled cyanide poisons cytochrome oxidase and presents with abrupt collapse, profound lactic acidosis and a normal oxygen saturation; its patients are typically pale or ashen, and the flush attributed to it is inconstant. Benzocaine gels generate methemoglobin, which turns blood chocolate brown and the skin slate gray. Malathion vapor causes muscarinic secretions, miosis and bradycardia, with cyanosis rather than a red discoloration.
- In a patient with acute radiation sickness, which of the following symptoms would appear first?
- Vomiting and nausea
- Itching and dryness
- Blistering and pain
- Oozing and alopecia
Correct answer: Vomiting and nausea
Vomiting and nausea open the prodromal phase of acute radiation syndrome, often within minutes to a few hours of a large whole body dose, and the shorter that latency the higher the estimated exposure. Itching and dryness belong to the cutaneous syndrome and surface days after irradiation. Blistering and pain mark moist desquamation, a still later cutaneous stage. Oozing and alopecia develop over weeks, once basal skin cells and hair follicles stop dividing.
- A patient presents with fever, headache, and confusion after a tick bite. The presence of a maculopapular rash starting on the wrists and ankles suggests which of the following diseases?
- Early Lyme borreliosis fever
- Rocky Mountain spotted fever
- Acute onset ehrlichial fever
- Severe babesial anemic fever
Correct answer: Rocky Mountain spotted fever
Rocky Mountain spotted fever fits this picture: a maculopapular eruption that begins on the wrists and ankles and spreads centrally, with fever, headache and confusion produced by small vessel rickettsial vasculitis. Early Lyme borreliosis fever produces a single expanding erythema migrans lesion at the bite site, not an acral maculopapular eruption. Acute onset ehrlichial fever gives a similar systemic picture but is usually rash free, and when a rash does appear it spares the wrists and palms. Severe babesial anemic fever runs with hemolysis, jaundice and dark urine, and characteristically produces no rash.
- What is the primary treatment for a patient suffering from botulism?
- Penicillin infusion
- Neostigmine therapy
- Botulinum antitoxin
- Dexamethasone pulse
Correct answer: Botulinum antitoxin
Botulinum antitoxin is the primary treatment because it binds circulating toxin before it reaches presynaptic nerve terminals, so it limits how far the descending paralysis spreads, even though it cannot reverse blockade already established. Penicillin infusion does not neutralize a preformed toxin and is reserved for the wound source in wound botulism. Neostigmine therapy cannot restore transmission once the toxin has cleaved the vesicle release proteins inside the terminal. Dexamethasone pulse has no effect on a toxin mediated blockade and does not alter the clinical course.
- In the event of a chemical spill resulting in exposure to hydrofluoric acid, which of the following is the most appropriate first aid measure?
- Repeated cold water immersion
- Snug proximal tourniquet band
- Mild sodium bicarbonate rinse
- Topical calcium gluconate gel
Correct answer: Topical calcium gluconate gel
Topical calcium gluconate gel is the first aid measure that matters after hydrofluoric acid contact, because free fluoride ion strips calcium and magnesium out of tissue and the gel supplies calcium at the burn to stop that sequestration, the deep pain and the hypocalcemia it drives. Repeated cold water immersion washes off surface acid but leaves fluoride already in the dermis free to chelate calcium, and it postpones the one treatment that helps. Snug proximal tourniquet band adds ischemia to a chemical injury without limiting fluoride that has already penetrated. Mild sodium bicarbonate rinse is an exothermic neutralization that burns tissue further and does nothing about fluoride ion.
- A patient presents with acute respiratory distress syndrome (ARDS) following inhalation of chlorine gas. Which of the following is the most appropriate management strategy?
- Immediate intubation and mechanical ventilation
- Humidified oxygen and scheduled bronchodilators
- Nebulized bicarbonate and prophylactic steroids
- Aerosolized epinephrine and supportive measures
Correct answer: Immediate intubation and mechanical ventilation
Immediate intubation and mechanical ventilation is the management strategy once chlorine inhalation has produced acute respiratory distress syndrome, because the alveolar flooding and shunt of that syndrome need a secured airway and positive end expiratory pressure rather than any drug. Humidified oxygen and scheduled bronchodilators cannot recruit flooded alveoli, so the shunt and the hypoxemia persist. Nebulized bicarbonate and prophylactic steroids have no proven effect on chlorine lung injury and delay definitive airway control. Aerosolized epinephrine and supportive measures address upper airway edema, not the diffuse alveolar damage described here.
- What is the recommended treatment for a snakebite from a pit viper when envenomation is suspected?
- Direct cryotherapy application
- Intravenous antivenom infusion
- Sustained joint immobilization
- Immediate tourniquet placement
Correct answer: Intravenous antivenom infusion
Intravenous antivenom infusion is the treatment once pit viper envenomation is suspected, since only the Fab fragments bind and clear circulating venom and so halt progressive swelling, coagulopathy and tissue necrosis. Direct cryotherapy application adds cold injury to tissue that is already ischemic and neutralizes no venom. Sustained joint immobilization is sensible field first aid, yet it only slows lymphatic spread and leaves the systemic venom load untouched. Immediate tourniquet placement concentrates venom distally, raises compartment pressure and risks limb loss.
- Which of the following is a hallmark sign of Ebola virus disease 'EVD'?
- Copious diarrhea
- Ocular injection
- Hemorrhagic rash
- Pustular lesions
Correct answer: Hemorrhagic rash
Hemorrhagic rash is the hallmark sign attached to Ebola virus disease: a diffuse maculopapular eruption that turns petechial and confluent as capillary integrity fails, appearing with mucosal and puncture site bleeding. Copious diarrhea drives most of the volume loss in this illness but is nonspecific and shared with cholera and many enteric infections, so it marks no particular pathogen. Ocular injection is a soft finding seen in many febrile tropical illnesses. Pustular lesions belong to the orthopoxviruses such as smallpox and mpox and form no part of filovirus disease.
- A patient presents with severe metabolic acidosis and a history of ingesting a household cleaner. Which substance is most likely responsible?
- Isopropanol gel
- Bleach solution
- Phosphoric acid
- Ethylene glycol
Correct answer: Ethylene glycol
Ethylene glycol is the ingestion that best explains severe metabolic acidosis: it is oxidized to glycolic and oxalic acids, which open a wide anion gap alongside an osmolal gap and deposit calcium oxalate in the kidney. Isopropanol gel produces deep intoxication with ketosis and no acidosis, because acetone is its end product and acetone is not an acid. Bleach solution irritates mucosa and its hypochlorite is neutralized in gastric contents, so a systemic acidosis is not expected. Phosphoric acid injures tissue on contact, and household descaler concentrations are far too dilute to acidify serum.
- In the management of a patient with severe acute radiation syndrome, which of the following treatments is essential to prevent infection due to bone marrow suppression?
- Granulocyte growth factor support (G-CSF)
- Intravenous pooled immune globulin (IVIG)
- Recurrent packed cell transfusions (PRBC)
- Extended renal replacement therapy (CRRT)
Correct answer: Granulocyte growth factor support (G-CSF)
Granulocyte growth factor support (G-CSF) is what prevents infection after a marrow ablating radiation dose, because it drives the surviving myeloid progenitors toward mature neutrophils and shortens the neutropenic window during which bacteria translocate. Intravenous pooled immune globulin (IVIG) replaces antibody, and antibody is not the deficit when radiation wipes out the myeloid line. Recurrent packed cell transfusions (PRBC) correct anemia and deliver no leukocytes capable of fighting infection. Extended renal replacement therapy (CRRT) clears solute and has no effect on marrow recovery.
- A patient presents with blurred vision, tachycardia, and urinary retention following the ingestion of a plant. Which of the following plants is most likely responsible?
- Japanese yew (Taxus)
- Jimson weed (Datura)
- Poppy head (Papaver)
- Castor pod (Ricinus)
Correct answer: Jimson weed (Datura)
Jimson weed (Datura) explains this presentation, because its tropane alkaloids block muscarinic receptors and produce cycloplegic blurring, sinus tachycardia and a distended bladder that will not empty. Japanese yew (Taxus) delivers taxine alkaloids that block cardiac sodium and calcium channels, so it presents with bradycardia and wide complex arrest. Poppy head (Papaver) yields opiates, which constrict the pupil and slow the pulse instead of dilating and speeding them. Castor pod (Ricinus) contains ricin, which halts protein synthesis and causes hemorrhagic gastroenteritis.
- For a patient experiencing severe lead poisoning, which of the following chelating agents is preferred?
- Dimercaprol treatment (BAL)
- Succimer preparation (DMSA)
- Calcium edetate (CaNa2EDTA)
- Deferoxamine infusion (DFO)
Correct answer: Calcium edetate (CaNa2EDTA)
Calcium edetate (CaNa2EDTA) is the chelator preferred in severe lead poisoning, because it trades its calcium for lead in extracellular fluid and moves large quantities of the metal into urine without stripping essential metals. Dimercaprol treatment (BAL) is an adjunct in lead encephalopathy, yet given alone it clears far less lead and is a painful oil based injection. Succimer preparation (DMSA) is the oral agent for mild and moderate elevations, so it is unsuitable when vomiting or encephalopathy is present. Deferoxamine infusion (DFO) is specific for iron and binds lead too weakly to help.
- Which of the following is the most effective treatment strategy for a patient suffering from digoxin toxicity?
- Activated charcoal slurry
- Urgent hemodialysis cycle
- Intravenous calcium salts
- Antidigoxin Fab fragments
Correct answer: Antidigoxin Fab fragments
Antidigoxin Fab fragments are the most effective treatment for this toxicity, because each fragment binds a molecule of the drug, strips it off the sodium potassium pump and carries the complex out in urine, so hyperkalemia and dysrhythmias settle within about an hour. Activated charcoal slurry only interrupts enterohepatic recycling and reaches none of the drug already bound in tissue. Urgent hemodialysis cycle cannot remove an agent with a very large volume of distribution and heavy tissue binding. Intravenous calcium salts are avoided here, since extra calcium in a poisoned myocardium risks refractory contracture.
- A patient presents with severe dyspnea, wheezing, and cough after inhalation of a gas at an industrial site. Which gas is most likely responsible for these symptoms?
- Nitrogen dioxide
- Propane cylinder
- Acetylene vapors
- Compressed argon
Correct answer: Nitrogen dioxide
Nitrogen dioxide best explains dyspnea, wheezing and cough after an industrial exposure, because it is poorly soluble, reaches the terminal bronchioles before it hydrolyzes and injures the small airways and alveoli directly. Propane cylinder contents are a simple asphyxiant that displaces oxygen and cause collapse without airway irritation. Acetylene vapors likewise act by displacing oxygen and carry no irritant effect on bronchial mucosa. Compressed argon is chemically inert, so it can suffocate a worker in a confined space but cannot inflame an airway.
- Which of the following findings is most indicative of severe carbon monoxide poisoning on laboratory testing?
- Depressed serum bicarbonate concentration
- Elevated blood carboxyhemoglobin fraction
- Markedly increased peripheral neutrophils
- Consistently reduced arterial oxygenation
Correct answer: Elevated blood carboxyhemoglobin fraction
Elevated blood carboxyhemoglobin fraction is the laboratory result that establishes severe carbon monoxide poisoning, because it measures the bound pigment directly and grades the exposure rather than inferring it. Depressed serum bicarbonate concentration reflects the lactic acidosis of any tissue hypoxia and points to no particular toxin. Markedly increased peripheral neutrophils accompany stress and countless acute illnesses, so that count carries no diagnostic weight here. Consistently reduced arterial oxygenation does not occur, since dissolved oxygen and the calculated saturation stay unchanged while hemoglobin is occupied.
- In the context of emergency nursing, which of the following actions is considered a violation of professional boundaries?
- Disclosing a bereavement with a patient after their assessment
- Repeating a demonstration with a patient after their procedure
- Establishing a friendship with a patient after their discharge
- Documenting a grievance with a patient after their examination
Correct answer: Establishing a friendship with a patient after their discharge
Establishing a friendship with a patient after their discharge is the boundary violation, because it converts a relationship built on unequal knowledge and power into a personal one, and the duty to stay objective does not lapse when the chart closes. Disclosing a bereavement with a patient after their assessment is brief, purposeful self disclosure that serves the patient and keeps the relationship therapeutic. Repeating a demonstration with a patient after their procedure is ordinary teaching that reinforces safe technique. Documenting a grievance with a patient after their examination records a concern through the correct channel and protects both parties.
- Which of the following best describes the principle of autonomy in emergency nursing practice?
- Determining and overriding a patient's right to make their own treatment decisions
- Measuring and subordinating a patient's right to make their own resource decisions
- Transcribing and confirming a patient's right to make their own referral decisions
- Respecting and supporting a patient's right to make their own healthcare decisions
Correct answer: Respecting and supporting a patient's right to make their own healthcare decisions
Respecting and supporting a patient's right to make their own healthcare decisions is what autonomy means: the nurse supplies the information and then honors the choice a capable patient reaches. Determining and overriding a patient's right to make their own treatment decisions describes paternalism, the principle autonomy was framed to displace. Measuring and subordinating a patient's right to make their own resource decisions describes utility, where the individual yields to aggregate benefit. Transcribing and confirming a patient's right to make their own referral decisions is clerical work on a form and captures none of the underlying principle.
- When dealing with ethical dilemmas in the emergency department, which approach is most appropriate for ensuring ethical decision-making?
- Consulting the healthcare team and considering professional ethical guidelines
- Contacting the hospital administrator and accepting unwritten ethical routines
- Telephoning the experienced clinician and copying personal ethical preferences
- Petitioning the appointed committee and postponing immediate ethical decisions
Correct answer: Consulting the healthcare team and considering professional ethical guidelines
Consulting the healthcare team and considering professional ethical guidelines is the approach that holds up, because a dilemma is worked out by pooling the perspectives of everyone who shares the case and testing them against a published standard rather than one person's view. Contacting the hospital administrator and accepting unwritten ethical routines substitutes local habit for a reasoned standard and leaves the clinical facts unexamined. Telephoning the experienced clinician and copying personal ethical preferences hands the question to one individual's values, which is precisely what a formal framework exists to prevent. Petitioning the appointed committee and postponing immediate ethical decisions abandons the patient while a review is scheduled, and emergency dilemmas seldom allow that delay.
- In emergency nursing, what is the most appropriate action when a conflict arises between a patient's wishes and the family's requests?
- Disregard the patient's wishes while accepting insistent objections of relatives
- Prioritize the patient's wishes while considering ethical principles of autonomy
- Compromise the patient's wishes while reducing potential penalties of litigation
- Relinquish the patient's wishes while awaiting formal instructions of executives
Correct answer: Prioritize the patient's wishes while considering ethical principles of autonomy
Prioritize the patient's wishes while considering ethical principles of autonomy is the action to take, because a capable patient's own decision governs their care and the family's role is to inform that decision rather than replace it. Disregard the patient's wishes while accepting insistent objections of relatives hands the outcome to whoever argues loudest and strips a competent adult of standing. Compromise the patient's wishes while reducing potential penalties of litigation makes institutional risk the deciding factor, which is not an ethical basis for care. Relinquish the patient's wishes while awaiting formal instructions of executives stalls urgent care and moves the choice to people with no clinical standing in it.
- Which statement accurately describes the concept of beneficence in emergency nursing?
- Beneficence is the tendency to rule in the best interest of the hospital.
- Beneficence is the right to refuse in the best interest of the unwilling.
- Beneficence is the obligation to act in the best interest of the patient.
- Beneficence is the allowance to harm in the best interest of the outcome.
Correct answer: Beneficence is the obligation to act in the best interest of the patient.
Beneficence is the obligation to act in the best interest of the patient. The principle is patient centered: it directs the nurse toward whichever option produces net good for the person in front of them. Beneficence is the tendency to rule in the best interest of the hospital describes institutional self protection, which is a management posture and not an ethical principle. Beneficence is the right to refuse in the best interest of the unwilling states autonomy, a separate principle that belongs to the patient rather than to the nurse. Beneficence is the allowance to harm in the best interest of the outcome inverts non maleficence and would license deliberate injury.
- What is the most appropriate response when an emergency nurse witnesses a colleague providing substandard care?
- Report the oversight to the offending nurse or colleague immediately.
- Report the omission to the attending doctor or relatives immediately.
- Report the criticism to the gathering team or bystanders immediately.
- Report the incident to the nursing manager or supervisor immediately.
Correct answer: Report the incident to the nursing manager or supervisor immediately.
Report the incident to the nursing manager or supervisor immediately. That line holds the authority to investigate, to protect the patient and to correct the practice, which is why the professional code routes concerns about a colleague there. Report the oversight to the offending nurse or colleague immediately keeps the concern in an informal peer conversation with no record and no power to compel change. Report the omission to the attending doctor or relatives immediately sends a nursing practice problem to people outside the accountability chain and discloses a colleague's conduct to a family. Report the criticism to the gathering team or bystanders immediately converts a practice issue into public humiliation and still reaches nobody who can act.
- Which of the following actions best demonstrates the principle of non-maleficence in emergency nursing?
- Ensuring all interventions minimize harm and risk to the patient
- Limiting all treatments citing costs and access to the uninsured
- Declining all requests showing bias and contempt to the homeless
- Continuing all therapies promising cure and comfort to the dying
Correct answer: Ensuring all interventions minimize harm and risk to the patient
Ensuring all interventions minimize harm and risk to the patient is non maleficence in practice: each planned act is weighed for the injury it could cause before anyone carries it out. Limiting all treatments citing costs and access to the uninsured is a failure of justice, since rationing by ability to pay is a distributive wrong rather than a restraint on injury. Declining all requests showing bias and contempt to the homeless abandons a patient and inflicts injury rather than avoiding it. Continuing all therapies promising cure and comfort to the dying prolongs suffering with burdensome treatment, which is exactly the injury this principle forbids.
- How should an emergency nurse act when faced with a situation that conflicts with their personal beliefs but is in accordance with professional guidelines?
- Decline requested care, ranking personal beliefs above professional guidelines
- Provide indicated care, placing professional guidelines above personal beliefs
- Transfer assigned care, quoting personal beliefs above professional guidelines
- Withhold ordered care, invoking professional guidelines above personal beliefs
Correct answer: Provide indicated care, placing professional guidelines above personal beliefs
Provide indicated care, placing professional guidelines above personal beliefs is the expected conduct, because a nursing license rests on a public standard and a patient in an emergency department cannot go elsewhere to find another clinician. Decline requested care, ranking personal beliefs above professional guidelines abandons the patient and substitutes private conviction for the standard the role is built on. Transfer assigned care, quoting personal beliefs above professional guidelines can be arranged in advance for a narrow set of procedures, yet doing it at the bedside without warning leaves the patient uncovered. Withhold ordered care, invoking professional guidelines above personal beliefs misuses a guideline as grounds for inaction, which no guideline actually supports.
- Which of the following is a key consideration in maintaining patient privacy and confidentiality in the emergency department?
- Broadcasting patient bulletins to those barely involved in the patient's care
- Discussing patient histories to those remotely involved in the patient's care
- Limiting patient information to those directly involved in the patient's care
- Circulating patient records to those minimally involved in the patient's care
Correct answer: Limiting patient information to those directly involved in the patient's care
Limiting patient information to those directly involved in the patient's care is the governing consideration, because access runs on a need to know basis and every additional reader widens the exposure without adding anything to the treatment. Broadcasting patient bulletins to those barely involved in the patient's care pushes identifiable detail to staff who have no role in it. Discussing patient histories to those remotely involved in the patient's care repeats the same fault in conversation, including in corridors and elevators where strangers overhear. Circulating patient records to those minimally involved in the patient's care distributes an entire chart far beyond the treating team.
- In the context of disaster response, what is the primary ethical concern for emergency nurses?
- Securing the removal of trained responders to precede the earliest rush of victims
- Assessing the payment of insured patients to favor the wealthiest band of arrivals
- Ordering the lineup of waiting casualties to mirror the highest ranks of officials
- Maximizing the use of available resources to benefit the greatest number of people
Correct answer: Maximizing the use of available resources to benefit the greatest number of people
Maximizing the use of available resources to benefit the greatest number of people is the governing concern in a disaster, because one patient at a time care gives way to a population standard the moment demand overwhelms supply. Securing the removal of trained responders to precede the earliest rush of victims confuses scene safety with abandoning the response, since responders are protected in order to keep working. Assessing the payment of insured patients to favor the wealthiest band of arrivals imports a financial test that no disaster plan recognizes. Ordering the lineup of waiting casualties to mirror the highest ranks of officials substitutes social standing for clinical need, which is the opposite of triage.
- What is the role of informed consent in emergency nursing care?
- It requires providing patients with information about their care and obtaining their agreement.
- It authorizes hurrying patients with reassurances about their care and presuming their consent.
- It tolerates delaying patients with formalities about their care and skipping their permission.
- It restricts briefing patients with leaflets about their care and ignoring their authorization.
Correct answer: It requires providing patients with information about their care and obtaining their agreement.
It requires providing patients with information about their care and obtaining their agreement. Informed consent is a two part duty: disclose the nature, risks, benefits and alternatives, then secure a voluntary decision from someone who has capacity. It authorizes hurrying patients with reassurances about their care and presuming their consent describes what the doctrine exists to prevent, since reassurance is not disclosure and silence is not a decision. It tolerates delaying patients with formalities about their care and skipping their permission treats the process as an obstacle to work around rather than a duty owed. It restricts briefing patients with leaflets about their care and ignoring their authorization mistakes handing over paper for a conversation the patient can question.
- Which of the following best reflects the principle of justice in the allocation of scarce resources in the emergency department?
- Releasing resources based on the sequence of the patient's registration
- Prioritizing resources based on the severity of the patient's condition
- Dispensing resources based on the reputation of the patient's household
- Withholding resources based on the allowance of the patient's insurance
Correct answer: Prioritizing resources based on the severity of the patient's condition
Prioritizing resources based on the severity of the patient's condition reflects justice, because a fair distribution turns on clinical need rather than on features of the person that have nothing to do with the illness. Releasing resources based on the sequence of the patient's registration rewards whoever arrived first and leaves the sickest waiting. Dispensing resources based on the reputation of the patient's household allocates by social standing, which justice rules out explicitly. Withholding resources based on the allowance of the patient's insurance makes ability to pay the deciding factor, and an emergency department owes care whatever the cover.
- In emergency nursing, what is the best approach to handle receiving an order from a physician that seems unsafe or inappropriate for the patient?
- Challenge the prescription with the physician to demand withdrawal or apology
- Refuse the medications with the physician to withhold rationale or discussion
- Discuss the concerns with the physician to seek clarification or modification
- Complete the instruction with the physician to protect hierarchy or seniority
Correct answer: Discuss the concerns with the physician to seek clarification or modification
Discuss the concerns with the physician to seek clarification or modification is the approach that works, because the nurse carries an independent duty to question an order that looks unsafe, and the quickest route to a safe order is the prescriber's own reasoning or a revision of it. Challenge the prescription with the physician to demand withdrawal or apology converts a clinical question into a confrontation, which makes cooperation less likely without making the patient safer. Refuse the medications with the physician to withhold rationale or discussion may stop one dose but leaves the prescriber unaware of the problem, so the same order returns. Complete the instruction with the physician to protect hierarchy or seniority carries out an order the nurse believes is dangerous and is the plainest breach of that duty.
- What is the most appropriate course of action for an emergency nurse who identifies a systemic issue that affects patient safety?
- Report the issue to the assembled clinicians or immediate handover team
- Report the issue to the concerned relatives or voluntary advocates team
- Report the issue to the statutory regulator or external inspection team
- Report the issue to the assigned management or quality improvement team
Correct answer: Report the issue to the assigned management or quality improvement team
Report the issue to the assigned management or quality improvement team is the course of action, because a systemic fault needs the people who own the process, the data and the authority to change it, and that route creates the record that drives review. Report the issue to the assembled clinicians or immediate handover team warns one shift and leaves the underlying process untouched. Report the issue to the concerned relatives or voluntary advocates team discloses an internal safety problem to people with no part in fixing it. Report the issue to the statutory regulator or external inspection team skips the internal channel that has to be tried first and delays any local correction.
- How should an emergency nurse proceed when a patient lacks the capacity to give informed consent and no legal surrogate is available?
- Provide urgent emergency treatment guided by the principle of implied consent
- Postpone routine emergency treatment guided by the absence of written consent
- Deliver chosen emergency treatment guided by the preference of silent consent
- Arrange partial emergency treatment guided by the opinion of friendly consent
Correct answer: Provide urgent emergency treatment guided by the principle of implied consent
Provide urgent emergency treatment guided by the principle of implied consent is how to proceed, because the law presumes a reasonable person would accept care that saves life or limb, and that presumption holds until a surrogate is found or capacity returns. Postpone routine emergency treatment guided by the absence of written consent waits for a signature nobody can lawfully supply and lets a treatable emergency progress. Deliver chosen emergency treatment guided by the preference of silent consent substitutes the nurse's taste for the objective standard of what a reasonable person would want. Arrange partial emergency treatment guided by the opinion of friendly consent leans on people with no legal authority to decide, since friends are not surrogates.
- What ethical consideration should guide an emergency nurse's decision-making when faced with a cultural practice that conflicts with conventional medical treatment?
- The nurse should decline to acknowledge the cultural practice within the scope of ethical and rapid medical care
- The nurse should attempt to accommodate the cultural practice within the bounds of ethical and safe medical care
- The nurse should expect to subordinate the cultural practice within the limits of ethical and usual medical care
- The nurse should arrange to delegate the cultural practice within the reach of ethical and obliging medical care
Correct answer: The nurse should attempt to accommodate the cultural practice within the bounds of ethical and safe medical care
The nurse should attempt to accommodate the cultural practice within the bounds of ethical and safe medical care is the consideration that governs, because respecting a patient's cultural identity and keeping that patient safe only come into conflict when the practice itself becomes dangerous. The nurse should decline to acknowledge the cultural practice within the scope of ethical and rapid medical care dismisses a legitimate part of who the patient is and damages the therapeutic relationship. The nurse should expect to subordinate the cultural practice within the limits of ethical and usual medical care assumes conventional treatment automatically outranks belief, which is not how the two are weighed. The nurse should arrange to delegate the cultural practice within the reach of ethical and obliging medical care hands the problem to whoever happens to agree and leaves the nurse's own obligation unmet.
- When an emergency nurse encounters a professional dilemma that is not addressed by existing policies or guidelines, what is the most appropriate initial action?
- Demand orders from a passing nurse or clerk
- Adopt decisions from a nearby nurse or aide
- Seek guidance from a senior nurse or mentor
- Await approval from a trainee nurse or peer
Correct answer: Seek guidance from a senior nurse or mentor
Seek guidance from a senior nurse or mentor is the initial action, because an experienced colleague can bring judgment to bear where no written rule reaches, and that conversation is quick enough to keep the patient moving. Demand orders from a passing nurse or clerk pulls in somebody with no knowledge of the case and no standing to direct practice. Adopt decisions from a nearby nurse or aide copies a precedent without any test of whether it was sound in the first place. Await approval from a trainee nurse or peer asks for authority from a person with less experience than the nurse facing the dilemma.
- Which of the following actions demonstrates an emergency nurse's commitment to lifelong learning and professional development?
- Reluctantly enrolling in obligatory refreshers and professional development conferences
- Exclusively rehearsing in mechanical techniques and professional development checklists
- Stubbornly persisting in traditional procedures and professional development objections
- Regularly participating in continuing education and professional development activities
Correct answer: Regularly participating in continuing education and professional development activities
Regularly participating in continuing education and professional development activities is the action that demonstrates commitment, because the obligation is ongoing rather than event driven and it keeps practice aligned with evidence that shifts every year. Reluctantly enrolling in obligatory refreshers and professional development conferences meets an employer's minimum, which is compliance rather than commitment. Exclusively rehearsing in mechanical techniques and professional development checklists builds hand skills while leaving the reasoning behind them unexamined. Stubbornly persisting in traditional procedures and professional development objections is a refusal of learning rather than evidence of it.
- What is the recommended approach for an emergency nurse who receives a complaint from a patient about the care provided?
- Listen actively, acknowledge the patient's concerns, and follow up according to hospital policy
- Respond defensively, denying the patient's grievance, and press hard contrary to stated routine
- Answer brusquely, shunting the patient's complaint, and hand off directly to external reviewers
- Reply quickly, predicting the patient's objection, and push ahead blindly to unverified repairs
Correct answer: Listen actively, acknowledge the patient's concerns, and follow up according to hospital policy
Listen actively, acknowledge the patient's concerns, and follow up according to hospital policy is the recommended approach, because being heard settles most complaints at the bedside and the policy route records the concern so the underlying problem gets examined. Respond defensively, denying the patient's grievance, and press hard contrary to stated routine refuses the person any hearing and usually enlarges what began as a small matter. Answer brusquely, shunting the patient's complaint, and hand off directly to external reviewers pushes the patient outside the department before anybody has asked what happened. Reply quickly, predicting the patient's objection, and push ahead blindly to unverified repairs promises a remedy for a problem nobody has yet defined.
- A 54-year-old patient presents with acute onset of severe dyspnea, sharp chest pain worsening with inspiration, and a recent history of lower leg deep vein thrombosis. Which of the following is the most likely diagnosis?
- Acute pericarditis
- Pulmonary embolism
- Atypical pneumonia
- Esophageal rupture
Correct answer: Pulmonary embolism
Pulmonary embolism fits this picture: a recent deep vein thrombosis supplies the source, and abrupt dyspnea with pleuritic chest pain is what follows when clot lodges in the pulmonary arteries. Acute pericarditis also gives pleuritic pain, but that pain eases on sitting forward and has no link to venous thrombosis. Atypical pneumonia builds over days with fever, cough and sputum rather than striking suddenly in a patient carrying a clot. Esophageal rupture follows forceful vomiting or instrumentation and shows subcutaneous emphysema and mediastinal air, neither of which is described.
- A patient presents with severe pelvic pain, adnexal mass on ultrasound, and elevated CA-125. Which of the following is the most likely diagnosis?
- Pelvic abscess
- Deep endometriosis
- Ovarian cancer
- Ruptured gestation
Correct answer: Ovarian cancer
Ovarian cancer is what these three findings point to together: a persistent adnexal mass with a raised CA-125 in a woman with pelvic pain is the classic presentation, and the marker rises in most epithelial ovarian tumors. Deep endometriosis also raises the marker and can form an adnexal endometrioma, but its pain is cyclical and tied to menstruation instead of steadily progressive. Pelvic abscess from tubal infection lifts the marker as well, though it arrives with fever, purulent discharge and marked cervical motion tenderness. Ruptured gestation would give a positive pregnancy test, hemodynamic instability and free fluid rather than a solid mass with marker elevation.
- In the emergency department, a patient is diagnosed with acute angle-closure glaucoma. Which of the following medications should be administered urgently to lower intraocular pressure?
- Repeated dorzolamide
- Topical metipranolol
- Scheduled prednisone
- Intravenous mannitol
Correct answer: Intravenous mannitol
Intravenous mannitol is the drug to give urgently, because an osmotic load in the bloodstream pulls water out of the vitreous within minutes and drops the pressure faster than anything placed on the surface of the eye. Repeated dorzolamide is a topical carbonic anhydrase inhibitor whose effect is modest and takes hours, so it cannot rescue an eye facing optic nerve infarction. Topical metipranolol reduces aqueous production and is a useful adjunct, yet the ischemic ciliary body in a high pressure attack responds poorly and the fall is small and slow. Scheduled prednisone calms the inflammation that follows the attack but does nothing to the pressure itself.
- A patient presents to the emergency department with jaundice, abdominal pain, and dark urine. Which of the following conditions is the most likely diagnosis?
- Cholecystitis, a gallbladder obstruction
- Hepatitis, a hepatocellular inflammation
- Pancreatitis, a retroperitoneal disorder
- Hemolysis, a microvascular fragmentation
Correct answer: Hepatitis, a hepatocellular inflammation
Jaundice with abdominal pain and dark urine points to hepatitis, a hepatocellular inflammation that raises conjugated bilirubin and spills it into the urine. Cholecystitis produces right upper quadrant pain and fever, but obstruction of the cystic duct alone does not yield this jaundice pattern. Pancreatitis is a retroperitoneal disorder marked by epigastric pain radiating to the back with lipase elevation, not by early dark urine. Hemolysis raises unconjugated bilirubin through microvascular fragmentation of red cells and gives pallor without hepatic tenderness.
- An emergency nurse is assessing a patient with suspected exposure to a nerve agent. Which of the following symptoms would be MOST indicative of this exposure?
- Pupillary dilation and tachycardia
- Cutaneous dryness and hyperthermia
- Muscle weakness and fasciculations
- Urinary retention and hypertension
Correct answer: Muscle weakness and fasciculations
Nerve agents inhibit acetylcholinesterase, so the nicotinic signs of muscle weakness and fasciculations are what point to this exposure, alongside the muscarinic picture of salivation, lacrimation, urination, defecation and emesis. Pupillary dilation is wrong because these agents drive pinpoint miosis, and tachycardia is wrong because bradycardia predominates. Cutaneous dryness and hyperthermia describe the anticholinergic toxidrome, the mirror image of the drenching sweat and copious secretions seen here. Urinary retention and hypertension likewise belong to anticholinergic poisoning; cholinergic excess causes incontinence and a falling heart rate instead.
- In evaluating a patient with a suspected mallet finger, which finding is most characteristic of this injury?
- Rigid flexion deformity at the PIP joint
- Ulnar collateral laxity at the MCP joint
- Marked basal tenderness at the CMC joint
- Absent active extension at the DIP joint
Correct answer: Absent active extension at the DIP joint
Mallet finger is an avulsion or rupture of the terminal extensor tendon, so its characteristic sign is absent active extension at the DIP joint, with the fingertip drooping in flexion while passive extension stays full. A rigid flexion deformity at the PIP joint describes a boutonniere lesion or an established contracture, not a mallet injury. Ulnar collateral laxity at the MCP joint is the thumb gamekeeper injury, and marked basal tenderness at the CMC joint reflects a Bennett fracture or thumb-base arthritis; neither disturbs the terminal extensor tendon at the fingertip.
- How should an emergency nurse manage personal information about a patient discovered through social media?
- Hold the information confidential and keep the care plan unaffected
- Weigh the information clinically and let the treatment plans change
- Broadcast the information onward and brief the entire clinical team
- Introduce the information openly and let the patient verify details
Correct answer: Hold the information confidential and keep the care plan unaffected
Material a nurse stumbles across on social media sits outside the therapeutic relationship, so the nurse should hold the information confidential and keep the care plan unaffected by it. To weigh the information clinically and let the treatment plans change would import unverified, non-consented material into decisions the patient never agreed to. To broadcast the information onward and brief the entire clinical team spreads a privacy breach rather than containing it. To introduce the information openly and let the patient verify details still discloses that the search happened and damages trust; the professional response is simply not to act on it.
- A stable 34-year-old presents with a regular narrow-complex tachycardia at a rate of 188 beats per minute. Vagal maneuvers have failed. The emergency nurse anticipates an order for adenosine. What is the correct initial adenosine dose and method of administration?
- 12 mg by slow IV drip, then postponed 20 mL saline flush
- 6 mg by rapid IV push, then immediate 20 mL saline flush
- 1 mg by gentle IV bolus, then partial 20 mL saline flush
- 150 mg by long IV infusion, then late 20 mL saline flush
Correct answer: 6 mg by rapid IV push, then immediate 20 mL saline flush
Adenosine is given as 6 mg by rapid IV push with an immediate 20 mL saline flush, because its half-life is only a few seconds and the drug must reach the AV node before it is metabolized. A slow drip with a postponed flush lets the dose dissipate in the tubing and the vein, and a gentle bolus chased by only a partial flush fails for the same reason. The 150 mg figure and a long infusion describe amiodarone rather than adenosine, and a late flush wastes the dose; 1 mg is the atropine dose. A second 12 mg dose may follow only if the first attempt fails to convert.
- A patient in stable, regular supraventricular tachycardia receives 6 mg of adenosine without conversion. The rhythm persists and the patient remains alert with adequate perfusion. What is the most appropriate next step the emergency nurse anticipates?
- A prompt series of forceful CPR by two gloved hands
- A slow infusion of magnesium sulfate by low IV drip
- A repeat dose of twelve milligrams by rapid IV push
- A hard shock of 200 joules by an unsynchronized AED
Correct answer: A repeat dose of twelve milligrams by rapid IV push
The rhythm is still regular, narrow and perfusing, so the anticipated step is a repeat dose of twelve milligrams by rapid IV push, the standard escalation after an unsuccessful six milligram attempt. A prompt series of forceful CPR by two gloved hands is wrong because the patient has a pulse and adequate perfusion. A slow infusion of magnesium sulfate by low IV drip treats torsades de pointes, not a regular narrow-complex tachycardia. A hard shock of 200 joules by an unsynchronized AED is both unnecessary in a conscious patient and dangerous, since an unsynchronized discharge can land on the T wave.
- A patient with supraventricular tachycardia becomes acutely unstable, developing hypotension, chest pain, and altered mental status while the monitor shows a regular narrow-complex rhythm at 210 beats per minute. Which intervention should the emergency nurse prepare for first?
- Prompt unsynchronized initial defibrillation
- Prompt high-volume crystalloid resuscitation
- Prompt intravenous metoprolol administration
- Prompt synchronized electrical cardioversion
Correct answer: Prompt synchronized electrical cardioversion
An unstable patient with a regular narrow-complex tachycardia needs prompt synchronized electrical cardioversion, because timing the discharge to the R wave keeps it off the vulnerable repolarization period. Prompt unsynchronized initial defibrillation belongs to pulseless ventricular tachycardia, ventricular fibrillation or polymorphic rhythms that cannot be synchronized, and here it would risk provoking fibrillation. Prompt high-volume crystalloid resuscitation does nothing to slow the rate and burdens a ventricle with almost no filling time. Prompt intravenous metoprolol administration acts far too slowly and would deepen the hypotension already present.
- The emergency nurse is asked to explain the difference between synchronized cardioversion and defibrillation to a new graduate. Which statement is accurate?
- Synchronized cardioversion times its shock to the R wave, while defibrillation delivers unsynchronized energy
- Synchronized cardioversion locks its shock to the T wave, while defibrillation releases preconfigured voltage
- Synchronized cardioversion pegs its shock to the P wave, while defibrillation applies nonsynchronized current
- Synchronized cardioversion targets its shock to the S wave, while defibrillation produces precalibrated power
Correct answer: Synchronized cardioversion times its shock to the R wave, while defibrillation delivers unsynchronized energy
The accurate statement is that synchronized cardioversion times its shock to the R wave, while defibrillation delivers unsynchronized energy. Sensing the R wave keeps the discharge away from the T wave, where energy can provoke ventricular fibrillation, so an option that locks its shock to the T wave and merely releases preconfigured voltage has the timing exactly backwards. Nothing is ever timed to the P wave, so the claim that cardioversion pegs its shock there while defibrillation applies nonsynchronized current fails on its first half. The option that targets its shock to the S wave and has defibrillation produce precalibrated power fails the same way: defibrillators are deliberately not synchronized because a pulseless rhythm offers no reliable marker to track.
- A patient on a QT-prolonging medication develops a polymorphic ventricular tachycardia with a twisting QRS axis and a palpable pulse. The emergency nurse recognizes torsades de pointes. Which medication is the first-line pharmacologic treatment?
- Adenosine, six to twelve milligrams by IV
- Magnesium sulfate, one to two grams by IV
- Epinephrine, two to nine micrograms by IV
- Bicarbonate, fifty milliequivalents by IV
Correct answer: Magnesium sulfate, one to two grams by IV
Torsades de pointes is treated first with magnesium sulfate, one to two grams by IV, which stabilizes the myocardium and suppresses the early afterdepolarizations that drive the twisting rhythm even when the serum level is unremarkable. Adenosine, six to twelve milligrams by IV, converts regular narrow-complex supraventricular tachycardia and does nothing for a polymorphic ventricular rhythm. Epinephrine, two to nine micrograms by IV, raises catecholamine tone and can aggravate a QT-related arrhythmia rather than settle it. Bicarbonate, fifty milliequivalents by IV, narrows the QRS in sodium-channel-blocker poisoning but neither shortens the QT interval nor stops torsades.
- A patient in torsades de pointes loses consciousness and becomes pulseless. The monitor continues to show a chaotic, twisting polymorphic ventricular rhythm. What is the most appropriate immediate intervention?
- Urgent synchronized cardioversion attempt
- Urgent measured magnesium supplementation
- Urgent unsynchronized defibrillator shock
- Urgent sustained baroreceptor stimulation
Correct answer: Urgent unsynchronized defibrillator shock
A pulseless polymorphic rhythm calls for an urgent unsynchronized defibrillator shock, because the constantly changing QRS gives the machine no reliable marker to sense. An urgent synchronized cardioversion attempt leaves the device hunting for that marker and either delays the discharge or withholds it altogether. Urgent measured magnesium supplementation has its place only after a shock has been delivered and does nothing for a patient with no pulse. Urgent sustained baroreceptor stimulation, the carotid sinus maneuver, has no role once the pulse is lost and wastes seconds that belong to compressions.
- A patient presents with crushing substernal chest pressure radiating to the left arm, diaphoresis, and nausea. The 12-lead ECG shows ST-segment elevation of 3 mm in leads V2, V3, and V4. The emergency nurse interprets this as which type of infarction?
- Septal STEMI in the RCA collateral territory
- Posterior STEMI in the LCX primary territory
- Lateral NSTEMI in the PDA marginal territory
- Anterior STEMI in the LAD coronary territory
Correct answer: Anterior STEMI in the LAD coronary territory
Leads V2, V3 and V4 face the anterior wall of the left ventricle, so 3 mm of elevation across them is an anterior STEMI in the LAD coronary territory. A septal STEMI in the RCA collateral territory is wrong twice over: the septum is read in V1 and V2, and it is fed by septal branches of the left anterior descending rather than the right coronary. A posterior STEMI in the LCX primary territory shows tall R waves with depression in V1 to V3 instead of elevation. A lateral NSTEMI in the PDA marginal territory is excluded because diagnostic elevation is present, which by definition rules out a non-elevation infarct, and the lateral wall is read in I, aVL, V5 and V6.
- While reviewing a 12-lead ECG on a 55-year-old man with chest pain, the emergency nurse must determine whether STEMI criteria are met. Which finding satisfies the diagnostic ECG criteria for STEMI?
- New ST elevation of at least one millimeter in two contiguous limb leads, or 2 mm in leads V2 and V3 for males
- New PR deviation of at least one millimeter in two adjacent limb leads, or 200 ms in leads V1 and V6 for males
- New ST depression of at least one millimeter in two distant limb leads, or 0.5 mm in leads V4 and V5 for males
- New ST-T inversion of at least one millimeter in two close limb leads, or four mm in leads V5 and V6 for males
Correct answer: New ST elevation of at least one millimeter in two contiguous limb leads, or 2 mm in leads V2 and V3 for males
The criteria are met by new ST elevation of at least one millimeter in two contiguous limb leads, or 2 mm in leads V2 and V3 for males, the V2-V3 threshold being higher because mild elevation there is a normal finding. New PR deviation of at least one millimeter in two adjacent limb leads with 200 ms in leads V1 and V6 describes conduction delay and pericardial change, not infarction. New ST depression of at least one millimeter in two distant limb leads with 0.5 mm in leads V4 and V5 fails twice: the leads are not anatomically neighboring and 0.5 mm sits under threshold. New ST-T inversion of at least one millimeter in two close limb leads with four mm in leads V5 and V6 is a repolarization change, and inversion by itself cannot satisfy an elevation rule.
- A patient with ongoing chest pain has a troponin elevation but the 12-lead ECG shows ST-segment depression and T-wave inversions without ST elevation. The emergency nurse understands this presentation is consistent with which diagnosis?
- Transmural occlusive infarction (STEMI)
- Subendocardial ischemic injury (NSTEMI)
- Pericardial inflammatory reaction (ECG)
- Demand-related predictable angina (CAD)
Correct answer: Subendocardial ischemic injury (NSTEMI)
A rising troponin with depression and T-wave inversion but no elevation is subendocardial ischemic injury, an NSTEMI. Transmural occlusive infarction, a STEMI, would show diagnostic elevation across one coronary territory, which this tracing does not have. Pericardial inflammatory reaction produces widespread concave elevation with PR depression on the ECG, the opposite of the depression described here. Demand-related predictable angina, the ordinary CAD picture, eases with rest and releases no troponin at all.
- A patient arrives with chest pain and a positive troponin but no ST elevation on the ECG. The emergency nurse explains the difference between STEMI and NSTEMI to a student. Which statement is correct?
- STEMI typically eliminates abnormal troponin release, while NSTEMI usually produces prolonged troponin release
- STEMI typically forbids routine fibrinolytic therapy, while NSTEMI usually demands prompt fibrinolytic therapy
- STEMI typically reflects complete arterial occlusion, while NSTEMI usually reflects partial arterial occlusion
- STEMI typically masks diagnostic segment elevation, while NSTEMI usually displays consistent segment elevation
Correct answer: STEMI typically reflects complete arterial occlusion, while NSTEMI usually reflects partial arterial occlusion
The correct statement is that STEMI typically reflects complete arterial occlusion, while NSTEMI usually reflects partial arterial occlusion; both kill myocardium and raise troponin, but only a fully occluded vessel produces the diagnostic ST elevation. Saying that STEMI typically eliminates abnormal troponin release while NSTEMI usually produces prolonged troponin release is false, since a STEMI raises troponin at least as much. Saying that STEMI typically forbids routine fibrinolytic therapy while NSTEMI usually demands prompt fibrinolytic therapy reverses practice: fibrinolytics belong to STEMI when catheter reperfusion is out of reach, and are not given in NSTEMI. Saying that STEMI typically masks diagnostic segment elevation while NSTEMI usually displays consistent segment elevation inverts the defining tracing.
- A patient with a new STEMI is being prepared for the catheterization lab. While reperfusion is arranged, which set of early nursing interventions for acute coronary syndrome is most appropriate?
- Routine corridor walking, IM injection, tablet ibuprofen, and oxygen started for saturations below 100 percent
- Hourly bedside weighing, PO hydration, delayed medication, and oxygen set for saturations below eighty percent
- Repeat troponin sampling, IO cannulation, sublingual nitrate, and oxygen kept for saturations below 96 percent
- Continuous cardiac monitoring, IV cannula, chewable aspirin, and oxygen begun for saturations below 90 percent
Correct answer: Continuous cardiac monitoring, IV cannula, chewable aspirin, and oxygen begun for saturations below 90 percent
The early bundle is continuous cardiac monitoring, IV cannula, chewable aspirin, and oxygen begun for saturations below 90 percent, since routine oxygen in a normoxic patient gives no benefit and can constrict coronary vessels. Routine corridor walking with IM injection, tablet ibuprofen and oxygen started for saturations below 100 percent fails on every element: exertion raises myocardial demand, ibuprofen is contraindicated in infarction, and that trigger means oxygen for everyone. Hourly bedside weighing with PO hydration, delayed medication and oxygen set for saturations below eighty percent withholds aspirin and tolerates dangerous hypoxemia. Repeat troponin sampling with IO cannulation, sublingual nitrate and oxygen kept for saturations below 96 percent substitutes serial laboratory work for treatment and still gives oxygen far too freely.
- A patient with an acute anterior myocardial infarction develops cool, mottled extremities, a systolic blood pressure of 78 mmHg, weak pulses, and pulmonary crackles. The emergency nurse recognizes cardiogenic shock. Which medication is most appropriate as a first-line vasoactive agent?
- Norepinephrine, a strong alpha stimulant
- Nitroglycerin, a venous vasodilator drug
- Labetalol, a mixed adrenergic antagonist
- Furosemide, a potent tubular natriuretic
Correct answer: Norepinephrine, a strong alpha stimulant
Cardiogenic shock is supported first with norepinephrine, a strong alpha stimulant, which lifts perfusion pressure with fewer arrhythmias than dopamine while preserving what output remains. Nitroglycerin, a venous vasodilator drug, drops preload and would deepen a systolic pressure already at 78 mmHg. Labetalol, a mixed adrenergic antagonist, blocks the very receptors sustaining contractility and heart rate. Furosemide, a potent tubular natriuretic, relieves congestion but strips volume from a patient who is already hypoperfused and does nothing for the failing pump.
- A hypotensive patient in cardiogenic shock following a large myocardial infarction has persistent hypoperfusion despite vasopressor support. The emergency nurse anticipates which adjunctive measure aimed at improving coronary perfusion and reducing left ventricular afterload?
- Unmonitored crystalloid resuscitation
- Intra-aortic balloon counterpulsation
- Immediate beta-blocker administration
- Transcutaneous myocardial stimulation
Correct answer: Intra-aortic balloon counterpulsation
Intra-aortic balloon counterpulsation is the anticipated mechanical adjunct, because inflation during diastole augments coronary filling while deflation just before systole unloads the left ventricle. Unmonitored crystalloid resuscitation floods a failing pump and drives pulmonary edema. Immediate beta-blocker administration depresses contractility further in a patient who is already underperfusing. Transcutaneous myocardial stimulation paces an electrical fault the patient does not have; the deficit here is mechanical pump failure rather than a rhythm disturbance.
- A trauma patient develops hypotension, jugular venous distention, and muffled heart sounds after blunt chest injury. The emergency nurse identifies this combination of findings as which classic triad?
- Cushing's triad, indicating rapid brain swelling
- Virchow's triad, indicating deep vein thrombosis
- Beck's triad, indicating acute cardiac tamponade
- Charcot's triad, indicating biliary tract sepsis
Correct answer: Beck's triad, indicating acute cardiac tamponade
Hypotension, jugular venous distention and muffled heart sounds together are Beck's triad, indicating acute cardiac tamponade, in which pericardial blood restricts ventricular filling. Cushing's triad, indicating rapid brain swelling, is hypertension with bradycardia and irregular respirations, the opposite pressure pattern. Virchow's triad, indicating deep vein thrombosis, names stasis, endothelial injury and hypercoagulability, which are risk factors rather than bedside findings. Charcot's triad, indicating biliary tract sepsis, is fever, jaundice and right upper quadrant pain.
- A patient with confirmed cardiac tamponade and a falling blood pressure requires emergent intervention. Which procedure should the emergency nurse prepare for to relieve the obstruction to cardiac filling?
- Intercostal decompressive thoracostomy
- Transcutaneous ventricular stimulation
- Bedside transthoracic echocardiography
- Urgent percutaneous pericardiocentesis
Correct answer: Urgent percutaneous pericardiocentesis
Urgent percutaneous pericardiocentesis relieves the tamponade directly, because aspirating even a small volume from the pericardial sac restores ventricular filling and usually lifts the blood pressure at once. Intercostal decompressive thoracostomy treats a tension pneumothorax and does nothing about fluid inside the pericardium. Transcutaneous ventricular stimulation drives a rate the heart cannot use while filling stays mechanically obstructed. Bedside transthoracic echocardiography confirms the effusion but is a diagnostic study, not the maneuver that removes the compression.
- A patient describes sudden, severe, tearing chest pain that radiates to the back between the shoulder blades. The emergency nurse notes a blood pressure of 188/104 mmHg in the right arm and 142/86 mmHg in the left arm. Which condition do these findings most strongly suggest?
- Acute aortic intimal dissection
- Mild viral pericardial soreness
- Rapid atrial fibrillation onset
- Persistent stable effort angina
Correct answer: Acute aortic intimal dissection
Tearing pain radiating between the shoulder blades with a wide difference between arm pressures points to acute aortic intimal dissection, in which the torn intima disrupts flow into one subclavian branch. Mild viral pericardial soreness is positional and pleuritic with a friction rub and produces no inter-arm gradient. Rapid atrial fibrillation onset gives palpitations with an irregular pulse rather than tearing interscapular pain. Persistent stable effort angina comes on with exertion and settles with rest, and it does not create unequal arm pressures.
- A patient with a suspected aortic dissection has a heart rate of 110 and a blood pressure of 190/110 mmHg. The emergency nurse anticipates the first goal of pharmacologic therapy will be to control which parameter to limit propagation of the dissection?
- Clotting rate and platelet count, with an IV heparin load
- Pulse rate and contractile force, with an IV beta blocker
- Glucose rate and cellular uptake, with an IV insulin drip
- Filling rate and preload volumes, with an IV saline bolus
Correct answer: Pulse rate and contractile force, with an IV beta blocker
The first pharmacologic target is pulse rate and contractile force, with an IV beta blocker, because cutting the shearing force on the aortic wall is what stops the tear extending; blockade comes before any vasodilator so that reflex tachycardia does not raise wall stress. Clotting rate and platelet count, with an IV heparin load, is actively harmful, since anticoagulation worsens bleeding from a torn aorta. Glucose rate and cellular uptake, with an IV insulin drip, addresses a metabolic problem this patient does not have. Filling rate and preload volumes, with an IV saline bolus, raises ejection force and would drive the tear further along the vessel.
- A patient arrives with a blood pressure of 220/124 mmHg accompanied by a severe headache, blurred vision, and a new troponin elevation with chest pain. The emergency nurse classifies this as which condition?
- Hypertensive urgency, an emergency classified by numeric pressure alone
- Hypertensive orthostatic swings, an emergency produced by posture shift
- Hypertensive emergency, an acute syndrome evidenced by end-organ damage
- Hypertensive white-coat readings, an emergency caused by clinic anxiety
Correct answer: Hypertensive emergency, an acute syndrome evidenced by end-organ damage
Severely raised pressure together with headache, blurred vision, chest pain and a rising troponin is a hypertensive emergency, an acute syndrome evidenced by end-organ damage; it is the organ injury, not the number, that defines it. Hypertensive urgency, an emergency classified by numeric pressure alone, is the wrong label because this patient plainly has organ injury, which is exactly what urgency excludes. Hypertensive orthostatic swings, an emergency produced by posture shift, describes pressure that varies with position, which is not what is happening here. Hypertensive white-coat readings, an emergency caused by clinic anxiety, describes transient elevation with no symptoms and no organ injury.
- The emergency nurse is teaching a colleague the distinction between hypertensive emergency and hypertensive urgency. Which statement correctly captures the difference?
- A hypertensive emergency encourages gradual oral therapy, while hypertensive urgency prohibits gradual oral therapy
- A hypertensive emergency avoids constant drip titration, while hypertensive urgency demands constant drip titration
- A hypertensive emergency observes fixed systolic limits, while hypertensive urgency observes fixed diastolic limits
- A hypertensive emergency includes acute end-organ damage, while hypertensive urgency lacks similar end-organ damage
Correct answer: A hypertensive emergency includes acute end-organ damage, while hypertensive urgency lacks similar end-organ damage
The distinction is that a hypertensive emergency includes acute end-organ damage, while hypertensive urgency lacks similar end-organ damage. Saying a hypertensive emergency encourages gradual oral therapy while hypertensive urgency prohibits gradual oral therapy reverses treatment: emergencies need titrated intravenous drugs and urgencies are brought down orally over days. Saying a hypertensive emergency avoids constant drip titration while hypertensive urgency demands constant drip titration reverses the monitoring in the same way. Saying a hypertensive emergency observes fixed systolic limits while hypertensive urgency observes fixed diastolic limits is wrong because no single pressure threshold separates them.
- A patient with atrial fibrillation and a rapid ventricular response of 168 beats per minute is alert, with a blood pressure of 128/78 mmHg and no chest pain. The emergency nurse anticipates which initial management approach?
- Rate reduction with IV blockers like diltiazem
- Rhythm reset with DC shocks like cardioversion
- Nodal blockade with IV syringes like adenosine
- Arrest care with AED jolts like defibrillation
Correct answer: Rate reduction with IV blockers like diltiazem
The patient is alert, normotensive and free of chest pain, so the anticipated approach is rate reduction with IV blockers like diltiazem, which slow conduction through the AV node and settle the ventricular response. Rhythm reset with DC shocks like cardioversion is held back for patients who are hemodynamically unstable. Nodal blockade with IV syringes like adenosine cannot control the chaotic multifocal atrial activity of fibrillation and at best unmasks it for a few seconds. Arrest care with AED jolts like defibrillation belongs to pulseless rhythms and would be dangerous in a perfusing patient.
- A patient in atrial fibrillation with a rapid ventricular response of 175 beats per minute develops hypotension at 76/40 mmHg, chest pain, and decreasing responsiveness. What is the most appropriate intervention the emergency nurse prepares for?
- Continued intravenous metoprolol infusions
- Quick synchronized electrical cardioversion
- Deferred ambulatory telemetry documentation
- Alternating baroreflex carotid manipulation
Correct answer: Quick synchronized electrical cardioversion
Hypotension, ischemic chest pain and a falling level of consciousness make this patient unstable, so rapid synchronized electrical cardioversion is what the nurse prepares. Continued intravenous metoprolol infusions acts far too slowly and would push the pressure lower still. Deferred ambulatory telemetry documentation is an outpatient diagnostic step with no place in an unstable presentation. Alternating baroreflex carotid manipulation is a vagal maneuver aimed at regular supraventricular rhythms and does nothing for fibrillation.
- A patient with acute decompensated heart failure presents with severe dyspnea, frothy pink sputum, and oxygen saturation of 84 percent on room air. Which intervention should the emergency nurse implement first to reduce the work of breathing and improve oxygenation?
- Lay the patient horizontally and start unmonitored cannula support
- Roll the patient leftward and start unlimited crystalloid infusion
- Sit the patient upright and start noninvasive pressure ventilation
- Walk the patient forwards and start supervised breathing exercises
Correct answer: Sit the patient upright and start noninvasive pressure ventilation
For flash pulmonary edema the first move is to sit the patient upright and start noninvasive pressure ventilation: the upright position cuts venous return while positive airway pressure drives fluid out of the alveoli and unloads the respiratory muscles. Lay the patient horizontally and start unmonitored cannula support worsens congestion and supplies far too little oxygen at a saturation of 84 percent. Roll the patient leftward and start unlimited crystalloid infusion adds volume to lungs that are already flooded. Walk the patient forwards and start supervised breathing exercises raises oxygen demand in someone who cannot meet it.
- A patient presents with substernal pressure that improves when sitting forward and worsens when lying flat, along with a scratchy three-component sound on auscultation. The 12-lead ECG shows diffuse, concave ST elevation across multiple lead groups with PR-segment depression. Which finding most distinguishes this condition from an acute STEMI?
- Localized elevation across contiguous leads, with ST depression
- Territorial elevation across coupled leads, with QRS depression
- Downsloping elevation across separate leads, with TP depression
- Widespread elevation across unrelated leads, with PR depression
Correct answer: Widespread elevation across unrelated leads, with PR depression
What separates this presentation from an infarct is widespread elevation across unrelated leads, with PR depression, because inflammation of the whole epicardium ignores the boundaries of any single coronary artery. Localized elevation across contiguous leads, with ST depression, is precisely the infarct pattern being excluded. Territorial elevation across coupled leads, with QRS depression, again confines the change to one vascular territory and so points the other way. Downsloping elevation across separate leads, with TP depression, misnames the morphology: pericarditis gives concave elevation, and the baseline shift that accompanies it sits in the PR segment.
- A patient is pulled from a house fire and arrives drowsy with a headache, nausea, and a measured carboxyhemoglobin level of 28 percent. The emergency nurse understands that the single most important initial treatment for this exposure is which of the following?
- High-flow oxygen at 100 percent by non-rebreather mask, until carboxyhemoglobin and symptoms clear
- Sodium thiosulfate at 25 percent by prolonged infusion, until carboxyhemoglobin and symptoms clear
- Ambient air at twenty-one percent by quiet observation, until carboxyhemoglobin and symptoms clear
- Methylene blue at 1 percent by repeated administration, until carboxyhemoglobin and symptoms clear
Correct answer: High-flow oxygen at 100 percent by non-rebreather mask, until carboxyhemoglobin and symptoms clear
Carbon monoxide is driven off hemoglobin by oxygen, so the single most important first step is high-flow oxygen at 100 percent by non-rebreather mask, until carboxyhemoglobin and symptoms clear; the half-life falls from several hours on room air to roughly an hour on 100 percent oxygen, and hyperbaric therapy is reserved for severe cases. Sodium thiosulfate at 25 percent by prolonged infusion is the cyanide antidote and leaves carboxyhemoglobin untouched. Ambient air at twenty-one percent by quiet observation abandons the only effective therapy and lets the half-life stay long. Methylene blue at 1 percent by repeated administration treats methemoglobinemia, a different abnormal pigment, and has no effect here.
- A farm worker is brought in after spraying pesticide, with copious oral secretions, tearing, miosis, muscle fasciculations, bradycardia, and wheezing. After decontamination and airway support, which antidotal therapy and treatment endpoint should the emergency nurse anticipate?
- Naloxone titrated until secretions increase and pupils enlarge, plus glucagon to reverse bronchoconstriction
- Atropine titrated until secretions dry and breathing eases, plus pralidoxime to restore acetylcholinesterase
- Flumazenil titrated until secretions vanish and sedation clears, plus diazepam to suppress neurotransmission
- Physostigmine titrated until secretions stream and twitching starts, plus charcoal to absorb organophosphate
Correct answer: Atropine titrated until secretions dry and breathing eases, plus pralidoxime to restore acetylcholinesterase
Pesticide exposure of this kind is a cholinergic crisis, so the anticipated regimen is atropine titrated until secretions dry and breathing eases, plus pralidoxime to restore acetylcholinesterase; the endpoint is clearing of bronchial secretions rather than a target pupil size or heart rate, and the oxime must be given before the enzyme ages. Naloxone titrated until secretions increase and pupils enlarge, plus glucagon to reverse bronchoconstriction, treats opioid poisoning and leaves the cholinergic excess running. Flumazenil titrated until secretions vanish and sedation clears, plus diazepam to suppress neurotransmission, reverses benzodiazepines and can provoke seizures. Physostigmine titrated until secretions stream and twitching starts, plus charcoal to absorb organophosphate, would deepen the crisis, because that drug is itself a cholinesterase inhibitor.
- A patient arrives at triage with fever, cough, coryza, conjunctivitis, and a blotchy maculopapular rash spreading from the face, and is unvaccinated after recent international travel. To protect staff and other patients, the emergency nurse should take which immediate action?
- Settle the patient into unrestricted waiting and fit staff with PPE coverings
- Settle the patient into contact precautions and fit staff with PPE protectors
- Settle the patient into airborne isolation and fit staff with N95 respirators
- Settle the patient into postponed screening and fit staff with PPE protection
Correct answer: Settle the patient into airborne isolation and fit staff with N95 respirators
Fever, cough, coryza, conjunctivitis and a descending blotchy rash in an unvaccinated traveler are measles, which travels by the airborne route, so the immediate action is to settle the patient into airborne isolation and fit staff with N95 respirators. Settle the patient into unrestricted waiting and fit staff with PPE coverings leaves a highly contagious aerosol in a shared room. Settle the patient into contact precautions and fit staff with PPE protectors supplies gown and glove cover that does nothing against airborne particles. Settle the patient into postponed screening and fit staff with PPE protection delays isolation until laboratory confirmation, by which time the exposure has already happened.
- A teenager who swallowed a large number of aspirin tablets presents with tinnitus, hyperventilation, vomiting, and an arterial blood gas showing a mixed respiratory alkalosis and metabolic acidosis. Beyond supportive care, which intervention should the emergency nurse anticipate as central to enhancing elimination?
- Intravenous acetylcysteine drip to sequester the toxin, which raises renal excretion of salicylate
- Intravenous calcium gluconate to inactivate the poison, which raises renal excretion of salicylate
- Intravenous ascorbate infusion to acidify the filtrate, which raises renal excretion of salicylate
- Intravenous sodium bicarbonate to alkalinize the urine, which raises renal excretion of salicylate
Correct answer: Intravenous sodium bicarbonate to alkalinize the urine, which raises renal excretion of salicylate
Salicylate is a weak acid, so the central measure beyond supportive care is intravenous sodium bicarbonate to alkalinize the urine, which raises renal excretion of salicylate. Lifting the urine pH toward eight keeps the drug ionized so the tubules cannot reabsorb it, and lifting the serum pH also holds salicylate out of the brain. Intravenous acetylcysteine drip to sequester the toxin belongs to acetaminophen poisoning and binds no salicylate at all. Intravenous calcium gluconate to inactivate the poison treats calcium channel blocker and hydrofluoric acid exposure, and leaves salicylate handling untouched. Intravenous ascorbate infusion to acidify the filtrate is the exact reverse of the correct move, since an acid urine leaves salicylate un-ionized and free to return across the tubule.
- A patient who intentionally ingested an extended-release calcium channel blocker presents with profound bradycardia and hypotension that does not respond to intravenous fluids and atropine. Which combination of therapies should the emergency nurse anticipate next?
- Intravenous calcium plus glucagon, then high-dose insulin and dextrose if hypotension persists
- Intravenous calcium plus dobutamine, then inhaled albuterol and oxygen if hypotension persists
- Intravenous calcium plus physostigmine, then naloxone and slow boluses if hypotension persists
- Intravenous calcium plus bicarbonate, then charcoal and gastric lavage if hypotension persists
Correct answer: Intravenous calcium plus glucagon, then high-dose insulin and dextrose if hypotension persists
The anticipated sequence is intravenous calcium plus glucagon, then high-dose insulin and dextrose if hypotension persists. Calcium raises the extracellular gradient to drive the blocked channels, glucagon lifts contractility through a pathway the blockade does not touch, and high-dose insulin with dextrose supports myocardial performance once pressure stays refractory. Intravenous calcium plus dobutamine, then inhaled albuterol and oxygen, treats bronchospasm the patient does not have and a beta-agonist alone is a poor match for channel blockade. Intravenous calcium plus physostigmine, then naloxone and slow boluses, reverses cholinergic and opioid poisoning, neither of which is present, and physostigmine can worsen bradycardia. Intravenous calcium plus bicarbonate, then charcoal and gastric lavage, addresses decontamination hours after absorption and offers nothing for the shock already established.
- A patient is stung on the foot by a stingray while wading at the beach and reports severe, escalating pain at the puncture site. After controlling bleeding and assessing the wound, which intervention should the emergency nurse prioritize for pain control specific to this envenomation?
- Bathe the punctured foot in steadily iced water, which immobilizes the swift-onset venom
- Bathe the punctured foot in tolerably hot water, which inactivates the heat-labile venom
- Bathe the punctured foot in briskly cooled water, which disperses the acid-soluble venom
- Bathe the punctured foot in freshly chilled water, which arrests the protein-based venom
Correct answer: Bathe the punctured foot in tolerably hot water, which inactivates the heat-labile venom
For pain control specific to a stingray sting the priority is to bathe the punctured foot in tolerably hot water, which inactivates the heat-labile venom. The bath runs at a temperature that is comfortable to touch, roughly 110 to 113 degrees Fahrenheit, and it both denatures the venom protein and relieves the intense pain; the wound is then irrigated and inspected for retained spine fragments, with tetanus cover and watch for infection. Bathe the punctured foot in steadily iced water, which immobilizes the swift-onset venom, mistakes the mechanism, because cold neither denatures the venom nor eases this pain. Bathe the punctured foot in briskly cooled water, which disperses the acid-soluble venom, misstates the chemistry and leaves the toxin active. Bathe the punctured foot in freshly chilled water, which arrests the protein-based venom, names the right class of toxin but the wrong temperature, and chilling preserves rather than destroys it.
- A walk-in patient reports crushing chest pain that started 20 minutes ago, is diaphoretic, and appears anxious but is currently breathing, has a pulse, and is alert. The patient is not in immediate danger of dying at this moment. Using the Emergency Severity Index, which triage level should the emergency nurse assign?
- ESI level 4, because the patient reached the waiting counter
- ESI level 1, because the patient requires a rescue procedure
- ESI level 2, because the patient carries a dangerous profile
- ESI level 3, because the patient presents a composed picture
Correct answer: ESI level 2, because the patient carries a dangerous profile
The assignment is ESI level 2, because the patient carries a dangerous profile. The Emergency Severity Index puts a high-risk situation, severe pain or distress, or new confusion at level 2 even when the patient is not dying at that moment, and new crushing chest pain with diaphoresis is the textbook high-risk presentation that should not wait for a bed. ESI level 4, because the patient reached the waiting counter, treats mode of arrival as if it graded acuity, which it does not. ESI level 1, because the patient requires a rescue procedure, is reserved for someone needing an immediate life-saving intervention, and this patient is breathing, perfusing and alert. ESI level 3, because the patient presents a composed picture, reads calm appearance as low risk and would place a possible infarct behind other waiting patients.
- At decision point D of the Emergency Severity Index, a stable, low-risk adult with abdominal pain will need a CBC, a metabolic panel, a urinalysis, a CT scan of the abdomen, and an intravenous fluid bolus. Counting resources by the ESI rules, how many resources does this patient require, and what triage level results?
- Five resources, so ESI level 5, with the tests counted alone
- Four resources, so ESI level 2, with the items counted twice
- Two resources, so ESI level 4, with the fluids counted apart
- Three resources, so ESI level 3, with the panel counted once
Correct answer: Three resources, so ESI level 3, with the panel counted once
The correct count is three resources, so ESI level 3, with the panel counted once. The Emergency Severity Index counts resources by type rather than by test, so the complete blood count, the metabolic panel and the urinalysis together are a single lab resource, the abdominal imaging is a second, and the intravenous fluid bolus is a third; two or more resources in a stable patient at decision point D gives level 3. Five resources, so ESI level 5, with the tests counted alone, counts each specimen separately, which is exactly the error the type rule exists to prevent, and level 5 means no resource at all. Four resources, so ESI level 2, with the items counted twice, double counts orders and then attaches a level that is assigned for high risk rather than for resource load. Two resources, so ESI level 4, with the fluids counted apart, drops the fluid bolus from the tally, but a therapeutic bolus is a counted resource while a simple saline lock is not.
- A 24-year-old presents to the emergency department waiting room and asks to be seen for severe abdominal pain. Under the Emergency Medical Treatment and Labor Act (EMTALA), what must the hospital provide first, before asking about insurance or ability to pay?
- A medical screening exam that identifies an emergency condition
- A medical billing packet that verifies an emergency coinsurance
- A medical boarding order that designates an emergency admission
- A medical forwarding sheet that schedules an emergency transfer
Correct answer: A medical screening exam that identifies an emergency condition
What the hospital owes first is a medical screening exam that identifies an emergency condition. The statute requires that anyone who comes to a dedicated emergency department asking for examination or treatment receives a screening examination applied in the same way to everyone with the same complaint, and it must come before any question about coverage. A medical billing packet that verifies an emergency coinsurance is precisely the payment inquiry the statute forbids as a precondition; registration may proceed but it cannot delay the exam. A medical boarding order that designates an emergency admission puts a disposition ahead of the assessment that would justify it, and admission is owed only if the screening finds a condition needing it. A medical forwarding sheet that schedules an emergency transfer moves a patient who has not yet been screened or stabilized, which is the classic dumping violation.
- A woman who is 39 weeks pregnant arrives in active labor at an emergency department that has obstetric capability. Under EMTALA, what constitutes stabilization for this patient?
- Signature of both the release and the escort
- Delivery of both the infant and the placenta
- Notation of both the heartbeat and the strip
- Analgesia of both the cramps and the anxiety
Correct answer: Delivery of both the infant and the placenta
Stabilization for a woman in active labor means delivery of both the infant and the placenta. The statute treats active labor as an emergency medical condition in itself, and the condition is not stabilized until the birth is complete, so a hospital with obstetric capability generally may not move her unless the benefit of transfer outweighs the risk. Signature of both the release and the escort supplies paperwork rather than treatment, and paperwork cannot stabilize a labor. Notation of both the heartbeat and the strip records a single reassuring measurement, which documents the condition without resolving it. Analgesia of both the cramps and the anxiety eases symptoms while the underlying emergency condition continues unchanged.
- During triage, an emergency nurse notes that a 78-year-old brought in by a caregiver has multiple bruises in different stages of healing, untreated pressure injuries, and signs of dehydration, and the caregiver answers all questions and refuses to leave the bedside. What is the emergency nurse's required action?
- Notify the unlicensed caregiver quietly, since a suspicion rarely survives scrutiny
- Notify the internal patient record, since a suspicion merely warrants documentation
- Notify the regional protective agency, since a suspicion already obliges disclosure
- Notify the hospital registrar last, since a suspicion legally requires confirmation
Correct answer: Notify the regional protective agency, since a suspicion already obliges disclosure
The required action is to notify the regional protective agency, since a suspicion already obliges disclosure. Nurses are mandated reporters for vulnerable adults, and the threshold is reasonable suspicion rather than proof, which is met by bruises of differing ages, untreated pressure injuries, dehydration and a companion who will not let the patient answer. Notify the unlicensed caregiver quietly, since a suspicion rarely survives scrutiny, warns the person the concern is about and can put the patient in greater danger. Notify the internal patient record, since a suspicion merely warrants documentation, mistakes charting for reporting and leaves the statutory duty unmet. Notify the hospital registrar last, since a suspicion legally requires confirmation, inverts the standard by demanding a certainty the reporter is never asked to supply.
- A patient with a non-survivable brain injury dies in the emergency department, and the family asks whether the patient can donate organs. The emergency nurse knows the patient is listed in the state donor registry. Which action is most consistent with organ donation law and best practice?
- The team should consult the closest relatives, which supersedes the registry decision
- The team should reverse the earlier enrollment, which nullifies the registry decision
- The team should postpone the retrieval procedure, which defeats the registry decision
- The team should call the procurement organization, which honors the registry decision
Correct answer: The team should call the procurement organization, which honors the registry decision
The action consistent with donation law is that the team should call the procurement organization, which honors the registry decision. Hospital staff make a timely referral rather than raising donation with the family themselves, and the procurement organization verifies the registry, judges suitability and treats a documented enrollment as first-person authorization that stands on its own. The team should consult the closest relatives, which supersedes the registry decision, reverses the legal order, because relatives are not empowered to revoke a registered decision. The team should reverse the earlier enrollment, which nullifies the registry decision, discards a legally binding declaration the patient made while competent. The team should postpone the retrieval procedure, which defeats the registry decision, wastes the narrow window in which donation after circulatory death remains possible, and donation is not confined to brain-dead patients in an intensive care unit.
- An unconscious patient arrives by ambulance with a life-threatening injury and no family or advance directive available. The emergency nurse and team begin resuscitation. Which legal principle authorizes treatment in this situation?
- Implied consent, which presumes an agreement to lifesaving care
- Express consent, which presupposes a signing from the paramedic
- Substituted consent, which expects a ruling from the magistrate
- Withheld consent, which permits omitting facts from the records
Correct answer: Implied consent, which presumes an agreement to lifesaving care
Treatment here rests on implied consent, which presumes an agreement to lifesaving care. When a patient cannot decide, no surrogate is at hand, and delay would cost life or limb, the law presumes a reasonable person would accept the necessary emergency treatment, and that presumption yields only to clear prior evidence of refusal such as a valid advance directive. Express consent, which presupposes a signing from the paramedic, fails because a transporting crew member holds no authority to decide for the patient. Substituted consent, which expects a ruling from the magistrate, describes a surrogate or court process that cannot be assembled in the minutes available. Withheld consent, which permits omitting facts from the records, misstates therapeutic privilege, a narrow allowance about disclosure that never supplies authority to treat.
- Family arrives with a valid POLST form and an advance directive indicating a patient with end-stage illness wants comfort care and no cardiopulmonary resuscitation. The patient then has a cardiac arrest in the emergency department. What should the emergency nurse do?
- Cancel the POLST orders and begin resuscitative care
- Override the POLST orders and launch aggressive care
- Respect the POLST orders and deliver palliative care
- Skip the POLST orders and seek committee-guided care
Correct answer: Respect the POLST orders and deliver palliative care
The right action is to respect the POLST orders and deliver palliative care: a POLST is a portable medical order that follows the patient between settings, so the team gives comfort measures and no chest compressions. To cancel the POLST orders and begin resuscitative care is wrong, because the form does not lapse at the hospital door. To override the POLST orders and launch aggressive care is wrong, because no blanket rule compels CPR once a valid order declines it. To skip the POLST orders and seek committee-guided care is wrong, because a clear and valid order takes effect with no ethics review.
- An emergency department is overwhelmed, and the charge nurse must decide what to delegate. According to scope-of-practice and delegation principles, which task is most appropriate to assign to unlicensed assistive personnel?
- Pushing the ordered cardiac drugs for a stable patient
- Teaching the discharge drug plans for a stable patient
- Setting the initial triage levels for a stable patient
- Obtaining the routine vital signs for a stable patient
Correct answer: Obtaining the routine vital signs for a stable patient
Obtaining the routine vital signs for a stable patient fits unlicensed assistive personnel, because it is a standardized measurement with a predictable result and no nursing judgment attached to it. Pushing the ordered cardiac drugs for a stable patient is medication administration reserved for a licensed nurse. Teaching the discharge drug plans for a stable patient demands evaluation of understanding and cannot be handed to an aide. Setting the initial triage levels for a stable patient is an acuity decision that rests on nursing assessment.
- Three patients arrive nearly simultaneously: a patient with a closed wrist fracture and stable vitals, a patient with new-onset slurred speech and right-sided weakness that began 45 minutes ago, and a patient requesting a prescription refill. Applying triage prioritization, whom should the emergency nurse see first?
- The patient with sudden hemiparesis and severe dysarthria
- The patient with localized tenderness and palpable pulses
- The patient with outpatient refills and reassuring vitals
- The patient with earliest arrival and unresolved soreness
Correct answer: The patient with sudden hemiparesis and severe dysarthria
The patient with sudden hemiparesis and severe dysarthria goes first: an abrupt focal deficit inside the thrombolytic window is the highest-risk presentation in the group, and every minute of delay costs salvageable brain. The patient with localized tenderness and palpable pulses has an isolated limb injury with intact perfusion and can wait. The patient with outpatient refills and reassuring vitals has no acute process under way. The patient with earliest arrival and unresolved soreness shows that order of registration never outranks acuity.
- An emergency nurse is interpreting an arterial blood gas drawn from a patient who took an intentional overdose of a sedative and is now unarousable. The results are a pH of 7.22, a PaCO2 of 68 mmHg, and a bicarbonate of 25 mEq/L. Which interpretation best fits this picture?
- Rapid respiratory alkalosis with early compensation
- Acute respiratory acidosis with absent compensation
- Primary metabolic acidosis with active compensation
- Chronic respiratory acidosis with full compensation
Correct answer: Acute respiratory acidosis with absent compensation
The gas shows acute respiratory acidosis with absent compensation: a pH of 7.22 is acidemic, a PaCO2 of 68 mmHg names the lungs as the source, and a bicarbonate of 25 mEq/L is untouched because the kidneys need days to respond. Rapid respiratory alkalosis with early compensation would require a low PaCO2 and a high pH. Primary metabolic acidosis with active compensation would show a low bicarbonate driving the pH down. Chronic respiratory acidosis with full compensation would already have pushed the bicarbonate well above the reference band.
- A patient with severe vomiting from a small bowel obstruction has an arterial blood gas with a pH of 7.52, a PaCO2 of 46 mmHg, and a bicarbonate of 36 mEq/L. The emergency nurse identifies this primary acid-base disturbance as:
- Progressive acidosis with unchecked bicarbonate exhaustion
- Transient alkalemia with severe unopposed hyperventilation
- Metabolic alkalosis with expected respiratory compensation
- Concurrent acidemia with layered ventilatory contributions
Correct answer: Metabolic alkalosis with expected respiratory compensation
The gas shows metabolic alkalosis with expected respiratory compensation: a pH of 7.52 is alkalemic, a bicarbonate of 36 mEq/L is the primary abnormality created by loss of gastric acid, and a PaCO2 of 46 mmHg is the mild hypoventilation the lungs add to blunt it. Progressive acidosis with unchecked bicarbonate exhaustion is wrong because the pH is high and the bicarbonate is raised. Transient alkalemia with severe unopposed hyperventilation is wrong because a primary respiratory alkalosis would show a low PaCO2. Concurrent acidemia with layered ventilatory contributions is wrong because no acidemia exists in these numbers.
- When teaching how to distinguish a respiratory acidosis from a metabolic acidosis on an arterial blood gas, the emergency nurse explains that once the pH confirms acidemia, the single value that tells you the disturbance is respiratory rather than metabolic is:
- The reassuring anion gap on this panel
- The improved PaO2 figure on this panel
- The reduced HCO3 measure on this panel
- The elevated PaCO2 count on this panel
Correct answer: The elevated PaCO2 count on this panel
The elevated PaCO2 count on this panel is what marks the acidosis as respiratory, because carbon dioxide the lungs fail to clear behaves as an acid and drives the pH down. The reassuring anion gap on this panel only subclassifies a metabolic acidosis and says nothing about ventilation. The improved PaO2 figure on this panel reports oxygenation, which does not set the pH. The reduced HCO3 measure on this panel is the signature of a metabolic acidosis, not a respiratory one.
- A patient with diabetic ketoacidosis and a patient with an opioid overdose both arrive in distress. The emergency nurse anticipates that, on the arterial blood gas, the ketoacidosis patient and the opioid patient will differ most clearly because:
- The ketoacidosis patient sheds the PaCO2 and the opioid patient gathers the PaCO2
- The ketoacidosis patient raises the HCO3 and the opioid patient exhausts the HCO3
- The ketoacidosis patient retains the PaCO2 and the opioid patient holds the PaCO2
- The ketoacidosis patient washes the PaCO2 and the opioid patient clears the PaCO2
Correct answer: The ketoacidosis patient sheds the PaCO2 and the opioid patient gathers the PaCO2
The ketoacidosis patient sheds the PaCO2 and the opioid patient gathers the PaCO2: Kussmaul breathing blows off carbon dioxide to offset a metabolic acidosis, while sedation of the respiratory center traps it. Saying the ketoacidosis patient raises the HCO3 and the opioid patient exhausts the HCO3 reverses the bicarbonate picture, since ketoacids consume bicarbonate. Saying the ketoacidosis patient retains the PaCO2 and the opioid patient holds the PaCO2 makes both hypercapnic, which a compensating metabolic acidosis never is. Saying the ketoacidosis patient washes the PaCO2 and the opioid patient clears the PaCO2 makes both hypocapnic, which sedative hypoventilation cannot produce.
- A firefighter is brought in after a house fire with a headache, confusion, and cherry-red skin. The pulse oximeter reads 99 percent, yet the emergency nurse remains concerned about carbon monoxide poisoning. The nurse understands the pulse oximetry reading is misleading because:
- The saturation reads right because the oximeter collects carboxyhemoglobin
- The saturation reads high because the oximeter miscounts carboxyhemoglobin
- The saturation reads lowered because the oximeter senses carboxyhemoglobin
- The saturation reads constant because the oximeter skips carboxyhemoglobin
Correct answer: The saturation reads high because the oximeter miscounts carboxyhemoglobin
The saturation reads high because the oximeter miscounts carboxyhemoglobin: a two-wavelength probe scores carboxyhemoglobin as though it were oxyhemoglobin, so a firefighter carrying a heavy carbon monoxide burden still displays 99 percent. It is untrue that the saturation reads right because the oximeter collects carboxyhemoglobin, since the probe never measures that species at all. It is untrue that the saturation reads lowered because the oximeter senses carboxyhemoglobin, since the number is falsely raised rather than pulled down. It is untrue that the saturation reads constant because the oximeter skips carboxyhemoglobin, since carbon monoxide binds hemoglobin avidly and blocks oxygen carriage. Co-oximetry measures the true level.
- A patient with confirmed carbon monoxide poisoning is placed on high-flow oxygen. The emergency nurse explains that breathing 100 percent oxygen instead of room air helps because it:
- Lengthens the decontamination interval to eighteen hours
- Confines the monoxide elimination to untreated baselines
- Lowers the carboxyhemoglobin half-life to ninety minutes
- Duplicates the hyperbaric acceleration to twenty minutes
Correct answer: Lowers the carboxyhemoglobin half-life to ninety minutes
High-flow oxygen lowers the carboxyhemoglobin half-life to ninety minutes, down from roughly five hours on room air, because oxygen displaces carbon monoxide from the hemoglobin binding site. The claim that it lengthens the decontamination interval to eighteen hours is backwards, since oxygen speeds clearance rather than slowing it. The claim that it confines the monoxide elimination to untreated baselines is wrong, since breathing air and breathing pure oxygen give very different rates. The claim that it duplicates the hyperbaric acceleration to twenty minutes overstates it, because only a chamber reaches that range, which is why severe cases are considered for hyperbaric therapy.
- A 3-year-old presents with a barking cough, inspiratory stridor at rest, and mild retractions after several days of a cold. The emergency nurse anticipates that first-line treatment for this presentation of croup will include:
- Nebulized continuous albuterol and a dose of azithromycin
- Nebulized concentrated saline and a dose of acetazolamide
- Nebulized topical lidocaine and a dose of succinylcholine
- Nebulized racemic epinephrine and a dose of dexamethasone
Correct answer: Nebulized racemic epinephrine and a dose of dexamethasone
Nebulized racemic epinephrine and a dose of dexamethasone is the first-line pair for croup with stridor at rest: racemic epinephrine shrinks subglottic edema within minutes, and dexamethasone holds the inflammation down and limits rebound. Nebulized continuous albuterol and a dose of azithromycin treats lower-airway bronchospasm and a bacterial infection, neither of which is present in viral croup. Nebulized concentrated saline and a dose of acetazolamide treats volume overload, which is not the problem here. Nebulized topical lidocaine and a dose of succinylcholine prepares for an intubation that mild retractions do not warrant.
- A previously healthy 6-year-old arrives drooling, sitting in a tripod position, with a muffled voice, high fever, and refusal to lie flat. The emergency nurse recognizes epiglottitis and understands the most important early nursing priority is to:
- Keep the child calm, spare the throat, and ready the airway
- Hold the child tight, probe the throat, and view the airway
- Leave the child idle, skip the throat, and defer the airway
- Lay the child down, suction the throat, and open the airway
Correct answer: Keep the child calm, spare the throat, and ready the airway
Keep the child calm, spare the throat, and ready the airway is the priority in epiglottitis, because agitation or instrumentation can trigger complete obstruction, and definitive control belongs in the operating room with the child upright on a parent's lap. Hold the child tight, probe the throat, and view the airway describes exactly the bedside inspection that can close a swollen epiglottis. Leave the child idle, skip the throat, and defer the airway wastes the narrow window before obstruction. Lay the child down, suction the throat, and open the airway forces a supine position and oropharyngeal stimulation that both make obstruction more likely.
- A patient with a severe acute asthma exacerbation has received continuous albuterol, ipratropium, and intravenous corticosteroids but remains in severe distress with a falling peak flow. The emergency nurse anticipates the next adjunct most consistent with current asthma exacerbation treatment guidance is:
- Intravenous furosemide treatment as a single bolus
- Intravenous magnesium sulfate as a single infusion
- Intravenous esmolol blockade as a single injection
- Intravenous aminophylline therapy as a single dose
Correct answer: Intravenous magnesium sulfate as a single infusion
Intravenous magnesium sulfate as a single infusion is the recognized adjunct once continuous beta-agonists, ipratropium and systemic steroids have failed to turn a severe exacerbation around, since it relaxes bronchial smooth muscle and can reduce admissions. Intravenous furosemide treatment as a single bolus targets fluid overload, not airway inflammation. Intravenous esmolol blockade as a single injection would worsen bronchospasm and is avoided in asthma. Intravenous aminophylline therapy as a single dose is an older agent with a narrow therapeutic window and no added benefit over current care.
- An adult patient with an acute asthma exacerbation has a peak expiratory flow that is 35 percent of personal best, speaks only in single words, and uses accessory muscles. Based on severity assessment, the emergency nurse classifies this exacerbation as:
- Negligible, needing modest reassurance and steady observation
- Mild, needing occasional inhalations and outpatient discharge
- Severe, needing continuous nebulizers and vigilant monitoring
- Moderate, needing scheduled steroids and routine reassessment
Correct answer: Severe, needing continuous nebulizers and vigilant monitoring
Severe, needing continuous nebulizers and vigilant monitoring is the right grading: a peak flow at 35 percent of personal best, single-word speech and accessory muscle use all place this exacerbation in the severe band, where continuous bronchodilators, systemic steroids and watchfulness for respiratory failure are standard. Negligible, needing modest reassurance and steady observation ignores objective evidence of dangerous obstruction. Mild, needing occasional inhalations and outpatient discharge would fit a peak flow above 70 percent with full sentences. Moderate, needing scheduled steroids and routine reassessment underestimates a patient who cannot complete a phrase.
- A patient in status asthmaticus has worsening hypercapnia and exhaustion despite maximal medical therapy, and intubation is imminent. When choosing an induction agent, the emergency nurse anticipates the physician may favor which medication for its bronchodilating properties?
- Propofol
- Fentanyl
- Diazepam
- Ketamine
Correct answer: Ketamine
Ketamine is favored for induction in status asthmaticus because it sedates while also relaxing bronchial smooth muscle, so it supports oxygenation through a difficult intubation. Propofol tends to drop the blood pressure of an already hyperinflated, preload-dependent patient and offers no bronchodilation. Fentanyl blunts airway reflexes but does nothing to open constricted airways and can cause chest wall rigidity. Diazepam sedates slowly and unpredictably and has no effect on bronchial tone.
- After intubation of a patient with status asthmaticus, the ventilator alarms for high peak pressures and the patient becomes hypotensive. The emergency nurse's priority action while the team troubleshoots breath stacking is to:
- Disconnect the ventilator circuit and release the trapped air
- Shorten the ventilator exhalation and raise the delivery rate
- Restrict the ventilator patient and reduce the infused volume
- Advance the ventilator settings and force the stacked breaths
Correct answer: Disconnect the ventilator circuit and release the trapped air
Disconnect the ventilator circuit and release the trapped air is the priority: dynamic hyperinflation, or breath stacking, raises intrathoracic pressure until venous return falls, and a brief disconnection with gentle chest compression lets the trapped volume escape and restores the blood pressure. Shorten the ventilator exhalation and raise the delivery rate leaves even less time to empty the lungs. Restrict the ventilator patient and reduce the infused volume treats a preload problem the wrong way. Advance the ventilator settings and force the stacked breaths adds volume to lungs that are already overfilled.
- A patient with a COPD exacerbation arrives on a nonrebreather mask titrated to a saturation of 100 percent. The emergency nurse recognizes the most appropriate oxygen saturation target in this patient is:
- 94 to 98 percent, the target for unaffected adults
- 88 to 92 percent, the target for chronic retainers
- 78 to 82 percent, the target for respiratory drive
- 96 to 100 percent, the target for maximal delivery
Correct answer: 88 to 92 percent, the target for chronic retainers
88 to 92 percent, the target for chronic retainers is correct, because generous oxygen in COPD blunts hypoxic drive and worsens ventilation-perfusion matching, pushing carbon dioxide toward narcosis. 94 to 98 percent, the target for unaffected adults applies to patients without chronic hypercapnia. 78 to 82 percent, the target for respiratory drive deliberately starves tissue of oxygen and is unsafe. 96 to 100 percent, the target for maximal delivery is exactly what has to be titrated down in a retainer.
- A patient with a COPD exacerbation has tried noninvasive ventilation but is now obtunded, unable to protect the airway, and has a rising PaCO2 with a falling pH. The emergency nurse recognizes the appropriate next step is:
- Refasten the noninvasive mask and sedate the resistant airway
- Continue the noninvasive mask and watch the obstructed airway
- Replace the noninvasive mask and secure the definitive airway
- Detach the noninvasive mask and abandon the oxygenated airway
Correct answer: Replace the noninvasive mask and secure the definitive airway
Replace the noninvasive mask and secure the definitive airway is the next step, because obtundation, loss of airway protection and a rising PaCO2 with a falling pH mean noninvasive support has failed and intubation cannot wait. Refasten the noninvasive mask and sedate the resistant airway sedates a patient who already cannot protect the airway. Continue the noninvasive mask and watch the obstructed airway lets a correctable respiratory acidosis run on to arrest. Detach the noninvasive mask and abandon the oxygenated airway strips support from a hypoxic patient and helps nothing.
- A patient develops sudden severe dyspnea, hypoxemia, and diffuse bilateral crackles two days after a near-drowning event. The chest x-ray shows bilateral infiltrates, and the heart size is normal with no signs of fluid overload. The emergency nurse recognizes this clinical picture as most consistent with:
- Uncomplicated unilateral pneumothorax from blunt alveolar rupture
- Cardiogenic venous congestion from reduced ventricular compliance
- Bronchospastic airway blockage from persistent airborne allergens
- Respiratory distress syndrome from noncardiogenic pulmonary edema
Correct answer: Respiratory distress syndrome from noncardiogenic pulmonary edema
Respiratory distress syndrome from noncardiogenic pulmonary edema fits best: bilateral infiltrates with refractory hypoxemia, an unenlarged heart and no volume overload two days after aspiration is the classic picture. Uncomplicated unilateral pneumothorax from blunt alveolar rupture would give one-sided findings, not diffuse bilateral crackles. Cardiogenic venous congestion from reduced ventricular compliance would show cardiomegaly and signs of fluid overload. Bronchospastic airway blockage from persistent airborne allergens would produce wheeze and air trapping rather than bilateral infiltrates.
- An intubated patient with acute respiratory distress syndrome has a PaO2 of 90 mmHg on a fraction of inspired oxygen of 0.6. Using the Berlin definition, the emergency nurse calculates the PaO2 to FiO2 ratio as 150 and classifies the severity as:
- Moderate ARDS, since the ratio lands between 100 and 200
- Severe ARDS, since the ratio plummets between 50 and 100
- Mild ARDS, since the ratio stretches between 200 and 300
- Absent ARDS, since the ratio settles between 300 and 500
Correct answer: Moderate ARDS, since the ratio lands between 100 and 200
Moderate ARDS, since the ratio lands between 100 and 200 is correct: dividing a PaO2 of 90 by an FiO2 of 0.6 gives 150, which sits in the moderate band of the Berlin definition. Severe ARDS, since the ratio plummets between 50 and 100 would need a value of 100 or less. Mild ARDS, since the ratio stretches between 200 and 300 describes a better-oxygenated lung than this one. Absent ARDS, since the ratio settles between 300 and 500 is the band in which the syndrome is not diagnosed at all.
- The emergency nurse is caring for a ventilated patient with acute respiratory distress syndrome and reviews lung-protective ventilation goals. Which strategy best reflects current evidence to reduce ventilator-induced lung injury?
- High plateau pressures of about 40 centimeters per inflation
- Restricted tidal volumes of about 6 milliliters per kilogram
- Large delivered breaths of about 12 milliliters per kilogram
- Flat expiratory pressure of about zero centimeters per cycle
Correct answer: Restricted tidal volumes of about 6 milliliters per kilogram
Restricted tidal volumes of about 6 milliliters per kilogram of predicted body weight are the cornerstone of lung-protective ventilation, because limiting distension limits the stretch injury that drives ventilator-induced lung damage. High plateau pressures of about 40 centimeters per inflation are exactly what the strategy caps, not what it seeks. Large delivered breaths of about 12 milliliters per kilogram overdistend injured alveoli and raise mortality. Flat expiratory pressure of about zero centimeters per cycle lets alveoli collapse with every breath, so positive end-expiratory pressure is applied rather than removed.
- A patient with acute decompensated heart failure arrives with pink frothy sputum, severe dyspnea, diffuse crackles, and an oxygen saturation of 84 percent. The emergency nurse anticipates an initial intervention plan for this cardiogenic pulmonary edema that centers on:
- Racemic epinephrine nebulizers, intravenous ceftriaxone, and inhaled corticoids
- Emergent thoracostomy placement, intravenous anesthesia, and pleural evacuation
- Noninvasive pressure ventilation, intravenous nitroglycerin, and loop diuretics
- Aggressive crystalloid infusion, intravenous albuterol, and further ipratropium
Correct answer: Noninvasive pressure ventilation, intravenous nitroglycerin, and loop diuretics
Noninvasive pressure ventilation, intravenous nitroglycerin, and loop diuretics is the initial plan for flash cardiogenic edema: positive pressure recruits flooded alveoli and cuts the work of breathing, nitroglycerin unloads preload and afterload, and a diuretic removes the excess volume. Racemic epinephrine nebulizers, intravenous ceftriaxone, and inhaled corticoids treat upper-airway edema and infection, neither of which is present. Emergent thoracostomy placement, intravenous anesthesia, and pleural evacuation treat an air or blood collection that this patient does not have. Aggressive crystalloid infusion, intravenous albuterol, and further ipratropium would pour more fluid into already flooded lungs.
- A trauma patient struck in the chest has decreased breath sounds and dullness to percussion on the left, flat neck veins, and worsening hypotension. The emergency nurse recognizes these findings as most consistent with:
- Compressive cardiac tamponade
- Nondisplaced costal fractures
- Complete tension pneumothorax
- Massive unilateral hemothorax
Correct answer: Massive unilateral hemothorax
Massive unilateral hemothorax explains the whole picture: blood filling one pleural cavity gives dullness to percussion with reduced breath sounds, and the volume lost into the chest leaves the neck veins flat while the pressure falls. Compressive cardiac tamponade would raise the neck veins and muffle the heart tones. Nondisplaced costal fractures cause pain and splinting, not shock with a dull hemithorax. Complete tension pneumothorax gives hyperresonance and distended neck veins, the opposite of the percussion and venous findings here.
- An emergency nurse is preparing to assist with chest tube insertion for a hemothorax. The nurse understands the chest tube for draining blood is typically positioned:
- Low posterior placement at the fifth midaxillary interspace
- Deep central placement at the fourth parasternal interspace
- High anterior placement at the second clavicular interspace
- Far inferior placement at the eleventh subcostal interspace
Correct answer: Low posterior placement at the fifth midaxillary interspace
Low posterior placement at the fifth midaxillary interspace is where a drain for blood belongs, because blood pools in the dependent part of the pleural cavity and the tube is directed backward to reach it. Deep central placement at the fourth parasternal interspace aims at the mediastinum and its great vessels. High anterior placement at the second clavicular interspace is the apical route used to evacuate air, not blood. Far inferior placement at the eleventh subcostal interspace risks the diaphragm, liver or spleen.
- A trauma patient with a suspected tension pneumothorax requires needle decompression. The emergency nurse understands that, under the most recent adult trauma guidance, an additional reason the lateral fifth intercostal space anterior axillary line site is favored over the traditional anterior site is that:
- The chest wall is closer and the catheter punctures the heart
- The chest wall is thinner and the catheter reaches the pleura
- The chest wall is thicker and the catheter bypasses the lungs
- The chest wall is spotless and the catheter avoids the scrubs
Correct answer: The chest wall is thinner and the catheter reaches the pleura
The chest wall is thinner and the catheter reaches the pleura is the reason the lateral site is preferred: a standard-length needle often fails to cross the thicker tissue at the anterior second interspace, so the tension is never relieved. The chest wall is closer and the catheter punctures the heart describes a complication to avoid, not an advantage. The chest wall is thicker and the catheter bypasses the lungs is doubly wrong, since the wall is thinner there and the lung is not skirted. The chest wall is spotless and the catheter avoids the scrubs is wrong because aseptic technique is used at every decompression site.
- A patient with sudden pleuritic chest pain and dyspnea has risk factors including recent orthopedic surgery and oral contraceptive use. As part of the pulmonary embolism nursing assessment, the nurse knows the diagnostic study used to definitively confirm most pulmonary emboli is:
- Pulmonary expiratory airflow measurements
- Pulmonary arterial wedge catheterizations
- Computed tomography pulmonary angiography
- Unenhanced pulmonary chest roentgenograms
Correct answer: Computed tomography pulmonary angiography
Computed tomography pulmonary angiography is the study that confirms most pulmonary emboli, because contrast fills the pulmonary arteries and the clot appears as a filling defect. Pulmonary expiratory airflow measurements grade obstructive airway disease and say nothing about clot. Pulmonary arterial wedge catheterizations are an invasive hemodynamic measure, not a diagnostic image for embolism. Unenhanced pulmonary chest roentgenograms are usually clear or nonspecific in embolism and serve mainly to exclude other causes of the pain.
- A hemodynamically stable patient with low pretest probability for pulmonary embolism has a negative D-dimer. The emergency nurse interprets this result as meaning that:
- Pulmonary embolism is confirmed, so the CT study is terminated
- Pulmonary embolism is anticipated, so the CT study is deferred
- Pulmonary embolism is unaffected, so the CT study is mandatory
- Pulmonary embolism is excluded, so the CT study is unnecessary
Correct answer: Pulmonary embolism is excluded, so the CT study is unnecessary
Pulmonary embolism is excluded, so the CT study is unnecessary is the right reading: in a low pretest probability patient the D-dimer has a very high negative predictive value, so a negative result rules the diagnosis out and spares the contrast and radiation. Pulmonary embolism is confirmed, so the CT study is terminated inverts the test, since a D-dimer can never establish the diagnosis. Pulmonary embolism is anticipated, so the CT study is deferred would commit a low-risk patient to treatment on no evidence. Pulmonary embolism is unaffected, so the CT study is mandatory ignores a result that carries real diagnostic weight in this risk band.
- A patient with a confirmed high-risk pulmonary embolism becomes hypotensive with signs of obstructive shock. The emergency nurse anticipates that definitive therapy for this massive PE, in the absence of contraindications, will most likely be:
- Systemic thrombolytic therapy to dissolve the clots
- Minimal subcutaneous therapy to block the extension
- Oral antiplatelet therapy to suppress the platelets
- Watchful supportive therapy to await the resolution
Correct answer: Systemic thrombolytic therapy to dissolve the clots
Systemic thrombolytic therapy to dissolve the clots is the definitive treatment once a high-risk embolism produces hypotension, because lysing the clot relieves right ventricular outflow obstruction and reverses the shock; catheter-directed lysis or embolectomy are the alternatives. Minimal subcutaneous therapy to block the extension is a prophylactic dose and cannot restore perfusion. Oral antiplatelet therapy to suppress the platelets has no role in venous thromboembolism. Watchful supportive therapy to await the resolution leaves an unstable patient with an untreated obstruction.
- A choking adult at the triage desk suddenly cannot speak, clutches the throat, and turns dusky while making no sound. The emergency nurse recognizes complete foreign body airway obstruction and the immediate intervention is to:
- Deliver blind searches until the obstruction dislodges
- Deliver abdominal thrusts until the obstruction clears
- Deliver repeated prompts until the obstruction loosens
- Deliver flat compressions until the obstruction shifts
Correct answer: Deliver abdominal thrusts until the obstruction clears
Deliver abdominal thrusts until the obstruction clears is the immediate action for a conscious adult with a complete blockage who cannot speak or move air; thrusts continue until the object comes out or the patient goes unresponsive, at which point CPR begins. Deliver blind searches until the obstruction dislodges risks driving the object deeper, so the mouth is inspected only when something is visible. Deliver repeated prompts until the obstruction loosens suits a partial blockage with effective coughing, not a silent one. Deliver flat compressions until the obstruction shifts describes what follows loss of consciousness, not the first move in a standing patient.
- A patient with a severe traumatic brain injury develops a blood pressure of 198/72 mmHg, a heart rate of 44 beats per minute, and an irregular breathing pattern that alternates deep breaths with periods of apnea. The emergency nurse recognizes that this combination of findings is best described as which of the following?
- Virchow's triad grouping
- Whipple's triad grouping
- Cushing's triad grouping
- Charcot's triad grouping
Correct answer: Cushing's triad grouping
The Cushing's triad grouping is a rising blood pressure with a widening pulse pressure, a falling heart rate and an irregular breathing pattern, and it is a late warning of brainstem compression from raised intracranial pressure. The Virchow's triad grouping names the three conditions that favor venous thrombosis. The Whipple's triad grouping is the set of findings used to confirm true hypoglycemia. The Charcot's triad grouping describes the fever, jaundice and right upper quadrant pain of ascending cholangitis.
- The emergency nurse is preparing to administer the National Institutes of Health Stroke Scale (NIHSS) to a patient with a suspected acute ischemic stroke. What does this tool primarily quantify?
- The likelihood of persistent depression after the stroke
- The emergence of hemorrhagic conversion after the stroke
- The candidacy of endovascular retrieval after the stroke
- The severity of neurological impairment after the stroke
Correct answer: The severity of neurological impairment after the stroke
The scale quantifies the severity of neurological impairment after the stroke, scoring level of consciousness, gaze, visual fields, facial palsy, limb strength, ataxia, sensation, language, dysarthria and inattention so that one number captures how much brain function is lost. It does not gauge the likelihood of persistent depression after the stroke, a mood outcome assessed much later. It does not detect the emergence of hemorrhagic conversion after the stroke, which needs repeat imaging. It does not settle the candidacy of endovascular retrieval after the stroke, which turns on vessel imaging and time windows.
- A higher total score on the National Institutes of Health Stroke Scale (NIHSS) generally indicates which of the following?
- A severe stroke with widespread neurological deficits
- A limited stroke with favorable neurological recovery
- A short stroke with temporary neurological complaints
- A completed stroke with settled neurological features
Correct answer: A severe stroke with widespread neurological deficits
A higher total means a severe stroke with widespread neurological deficits, since the scale adds points for every abnormal finding and runs from zero at the bottom to forty-two at the top. A limited stroke with favorable neurological recovery would generate a low total, not a high one. A short stroke with temporary neurological complaints describes a transient attack, which this scale cannot identify. A completed stroke with settled neurological features is not something a single number establishes, and a high score never means treatment is finished.
- A bystander activates emergency services after using a public stroke-screening tool that checks facial droop, arm drift, and abnormal speech. The emergency nurse identifies this prehospital tool as which of the following?
- Glasgow scale for repeated monitoring
- Cincinnati scale for roadside testing
- Hunt scale for preoperative screening
- Ranchos scale for outpatient planning
Correct answer: Cincinnati scale for roadside testing
The Cincinnati scale for roadside testing is the three-item field tool: facial droop, arm drift and abnormal speech, with any single abnormal item prompting rapid transport. The Glasgow scale for repeated monitoring grades eye, verbal and motor responses and measures depth of coma, not stroke signs. The Hunt scale for preoperative screening grades the severity of subarachnoid hemorrhage. The Ranchos scale for outpatient planning describes stages of cognitive recovery after brain injury.
- While administering the Cincinnati Prehospital Stroke Scale, the emergency nurse asks the patient to close the eyes and hold both arms straight out with palms up for ten seconds. One arm drifts downward. This finding represents an abnormal result in which component of the scale?
- Uneven smile line
- Muddy word choice
- Single limb droop
- Slow gaze control
Correct answer: Single limb droop
Single limb droop is the abnormal result being described, because holding both arms out with the eyes closed tests for unilateral motor weakness and one arm sinking downward is the positive finding. Uneven smile line belongs to the facial component, checked by asking the patient to grin or show the teeth. Muddy word choice belongs to the speech component, tested by having the patient repeat a set phrase. Slow gaze control is not part of this three-item field screen at all.
- A patient with a closed head injury becomes increasingly difficult to arouse. The emergency nurse notes a dilating, sluggishly reactive right pupil; rising systolic blood pressure with a widening pulse pressure; and slowing heart rate. These findings are most consistent with which of the following?
- Transient perfusion pressure with vasovagal syncope
- Diminished ventricular pressure with resolved edema
- Unchanged hemispheric pressure with mild concussion
- Runaway intracranial pressure with early herniation
Correct answer: Runaway intracranial pressure with early herniation
Runaway intracranial pressure with early herniation explains the whole cluster: a dilating sluggish pupil marks compression of the third cranial nerve, while a rising systolic reading with a widening pulse pressure and a slowing heart rate is the Cushing response. Transient perfusion pressure with vasovagal syncope produces hypotension with bradycardia, not hypertension. Diminished ventricular pressure with resolved edema would lift the level of arousal rather than depress it. Unchanged hemispheric pressure with mild concussion never produces a blown pupil.
- Which set of findings would the emergency nurse most likely associate with increasing intracranial pressure in an adult?
- Headache, vomiting, drowsiness, and a fixed unilateral pupil
- Agitation, hypothermia, sweating, and a tight pinpoint stare
- Trembling, flushing, restlessness, and a wide bounding pulse
- Hypotension, tachycardia, pallor, and a rapid gasping breath
Correct answer: Headache, vomiting, drowsiness, and a fixed unilateral pupil
Headache, vomiting, drowsiness, and a fixed unilateral pupil is the classic cluster of rising intracranial pressure: as pressure climbs, cerebral perfusion falls and the third cranial nerve is squeezed against the tentorium, so the pupil on that side dilates and stops reacting. Agitation, hypothermia, sweating, and a tight pinpoint stare fits an opioid or cholinergic exposure. Trembling, flushing, restlessness, and a wide bounding pulse suggests a sympathomimetic or thyroid state. Hypotension, tachycardia, pallor, and a rapid gasping breath points to shock, which drops the blood pressure instead of raising it.
- A 19-year-old college student presents with fever, severe headache, photophobia, nuchal rigidity, and a new petechial rash. The emergency nurse should suspect which condition and anticipate which priority action?
- Muscular cephalgia; provide simple analgesia and offer routine reassurance
- Bacterial meningitis; start droplet isolation and give empiric antibiotics
- Viral gastroenteritis; supply oral rehydration and monitor stool frequency
- Classic migraine; administer triptan therapy and schedule prompt discharge
Correct answer: Bacterial meningitis; start droplet isolation and give empiric antibiotics
Bacterial meningitis; start droplet isolation and give empiric antibiotics is the right pairing, because fever with headache, photophobia, neck stiffness and a petechial rash suggests meningococcal disease; antibiotics must not wait for the lumbar puncture, and droplet isolation protects staff and other patients. Muscular cephalgia; provide simple analgesia and offer routine reassurance treats an infectious emergency as a benign headache. Viral gastroenteritis; supply oral rehydration and monitor stool frequency explains neither the rash nor the meningeal signs. Classic migraine; administer triptan therapy and schedule prompt discharge would send home a patient with a life-threatening infection.
- The emergency nurse is assessing for meningeal irritation in a patient with suspected bacterial meningitis. The nurse flexes the patient's neck and notes involuntary flexion of the hips and knees. This positive finding is known as which sign?
- Kernig's provocative test
- Battle's descriptive test
- Brudzinski's bedside test
- Homans' confirmatory test
Correct answer: Brudzinski's bedside test
Brudzinski's bedside test is positive when passive flexion of the neck makes the hips and knees draw up involuntarily, which reflects meningeal irritation. Kernig's provocative test is the companion finding, in which extending the knee with the hip already flexed provokes pain and resistance. Battle's descriptive test refers to bruising over the mastoid that suggests a basilar skull fracture. Homans' confirmatory test relates to calf discomfort on dorsiflexion and belongs to deep vein thrombosis, not to meningitis.
- A patient opens the eyes to voice, is confused when spoken to, and localizes to a painful stimulus. Using the Glasgow Coma Scale, what is this patient's total score?
- Seven points recorded
- Nine points assembled
- Eleven points counted
- Thirteen points added
Correct answer: Thirteen points added
Thirteen points added is the keyed total here, reached by summing the eye, verbal and motor components; totals run from three at the lowest to fifteen in a fully alert person, and thirteen sits in the mild band. Seven points recorded would place the patient in the severe band, well below the level of someone who speaks and localizes. Nine points assembled and Eleven points counted both describe combinations with less eye opening or a poorer verbal reply than this patient shows.
- When interpreting the Glasgow Coma Scale, a total score of 8 or less is generally understood to indicate which of the following?
- Deep suppression of consciousness needing definitive intubation
- Localized impairment of consciousness needing verbal assessment
- Trivial blunting of consciousness needing scheduled observation
- Intact preservation of consciousness needing minimal monitoring
Correct answer: Deep suppression of consciousness needing definitive intubation
Deep suppression of consciousness needing definitive intubation is what a total of eight or less signals, because patients at that depth usually cannot protect the airway and aspiration risk is high. Localized impairment of consciousness needing verbal assessment misreads a whole-brain score as a language problem. Trivial blunting of consciousness needing scheduled observation belongs to the mild band of thirteen to fifteen. Intact preservation of consciousness needing minimal monitoring would describe a full score of fifteen.
- A patient arrives with acute focal neurological deficits, and a non-contrast head CT is obtained as the first imaging study. The primary reason the emergency nurse anticipates this CT before any thrombolytic decision is to do which of the following?
- Confirm arterial territory from collateral channels
- Separate hemorrhagic injury from ischemic occlusion
- Establish peripheral glucose from capillary samples
- Determine consciousness grades from motor responses
Correct answer: Separate hemorrhagic injury from ischemic occlusion
Separate hemorrhagic injury from ischemic occlusion is the whole purpose of the first unenhanced scan, because a clot-dissolving drug is safe only once bleeding has been ruled out. Confirm arterial territory from collateral channels is not reliably possible on an early plain scan, which often looks unremarkable in the first hours. Establish peripheral glucose from capillary samples is done at the bedside with a meter, not by imaging. Determine consciousness grades from motor responses is a clinical assessment that needs no scan at all.
- Which clinical pattern most strongly favors a hemorrhagic stroke over an ischemic stroke at initial presentation?
- Gradual painless numbness, tingling, and slowly improving coordination
- Fleeting monocular blindness, vertigo, and promptly resolving weakness
- Localized limb weakness, dysphagia, and gradually worsening dysarthria
- Sudden intense headache, vomiting, and rapidly declining consciousness
Correct answer: Sudden intense headache, vomiting, and rapidly declining consciousness
Sudden intense headache, vomiting, and rapidly declining consciousness most strongly favors a hemorrhagic stroke, because bleeding raises intracranial pressure within minutes. Gradual painless numbness, tingling, and slowly improving coordination fits a migraine aura rather than any stroke. Fleeting monocular blindness, vertigo, and promptly resolving weakness describes amaurosis fugax with a transient ischemic attack, which by definition leaves no bleed behind. Localized limb weakness, dysphagia, and gradually worsening dysarthria is the focal picture of an ischemic infarct, in which early depressed consciousness is uncommon.
- A patient is in generalized convulsive status epilepticus with established intravenous access. After ensuring airway support and giving an appropriately dosed benzodiazepine, the seizure continues. According to current status epilepticus management, what is the most appropriate next pharmacologic step?
- Levetiracetam, fosphenytoin, or valproate as an IV load
- Propofol, pentobarbital, or etomidate as an IV infusion
- Midazolam, clonazepam, or diazepam as an IM reinjection
- Phenytoin, carbamazepine, or clobazam as an NG solution
Correct answer: Levetiracetam, fosphenytoin, or valproate as an IV load
When convulsions persist after an adequately dosed benzodiazepine, the algorithm advances to a second-line anticonvulsant, so levetiracetam, fosphenytoin, or valproate as an IV load is the next step. Propofol, pentobarbital, or etomidate as an IV infusion belongs to the later refractory stage and is premature before any second-line drug has been tried. Midazolam, clonazepam, or diazepam as an IM reinjection merely repeats the class that has already failed and stacks respiratory depression. Phenytoin, carbamazepine, or clobazam as an NG solution cannot work during active seizing, since enteral absorption is slow and unreliable.
- For an adult in status epilepticus with intravenous access, which medication and dosing best reflects the recommended first-line therapy?
- IV levetiracetam 60 mg/kg, a rapid load capped near 4500 mg
- IV lorazepam 0.1 mg/kg, a prompt injection capped near 4 mg
- PO diazepam 0.3 mg/kg, a swallowed tablet capped near 10 mg
- IM midazolam 0.2 mg/kg, a deltoid syringe capped near 10 mg
Correct answer: IV lorazepam 0.1 mg/kg, a prompt injection capped near 4 mg
IV lorazepam 0.1 mg/kg, a prompt injection capped near 4 mg, is the recommended opening therapy, because benzodiazepines terminate seizure activity fastest once a vein is available. IV levetiracetam 60 mg/kg as a rapid load capped near 4500 mg is a second-line agent, not the opening drug. PO diazepam 0.3 mg/kg as a swallowed tablet capped near 10 mg is absorbed far too slowly to stop active convulsions. IM midazolam 0.2 mg/kg by deltoid syringe capped near 10 mg is reserved for patients who have no vein, which is not the case here.
- A patient with an acute ischemic stroke is being evaluated for intravenous thrombolysis. Which of the following findings is an absolute contraindication to giving a thrombolytic?
- Fully corrected systolic pressure or a witnessed onset seizure
- Purely chronological advanced age or a mildly elevated glucose
- Active internal blood loss or a recent intracranial hemorrhage
- Rapid neurologic symptom recovery or a prior remote infarction
Correct answer: Active internal blood loss or a recent intracranial hemorrhage
Active internal blood loss or a recent intracranial hemorrhage is the absolute bar, since a thrombolytic would turn either into catastrophic bleeding. A fully corrected systolic pressure and a witnessed onset seizure are managed rather than disqualifying, so neither blocks the drug once the reading is lowered and a mimic is excluded. Purely chronological advanced age sets no ceiling for lysis, and a mildly elevated glucose matters only at the extremes. Rapid neurologic symptom recovery is a relative caution to weigh, and a prior remote infarction outside the recent window still permits treatment.
- Before a thrombolytic can be given for acute ischemic stroke, the emergency nurse confirms that blood pressure is below the treatment threshold. Sustained blood pressure above which approximate level is considered a contraindication unless it can be safely lowered first?
- 140/90 mmHg, the conventional diagnostic benchmark
- 160/100 mmHg, the moderate-range medication cutoff
- 220/120 mmHg, the hypertensive crisis presentation
- 185/110 mmHg, the thrombolysis eligibility maximum
Correct answer: 185/110 mmHg, the thrombolysis eligibility maximum
185/110 mmHg is the thrombolysis eligibility maximum; a sustained reading above it must be brought down first, because higher pressures multiply the risk of symptomatic intracerebral bleeding. 140/90 mmHg is only the conventional diagnostic benchmark for hypertension and sits far below any lytic limit. 160/100 mmHg is a moderate-range medication cutoff used in chronic care, not a bar to lysis. 220/120 mmHg belongs to the hypertensive crisis presentation and lies well past the cutoff rather than defining it.
- A patient with an acute ischemic stroke caused by a large vessel occlusion presents within the 4.5-hour window and is eligible for intravenous thrombolysis. Under the current AHA/ASA stroke guideline, which thrombolytic agent and dose is given as a single intravenous bolus and is now endorsed as a reasonable alternative to alteplase, often preferred for its simpler administration?
- Tenecteplase 0.25 mg/kg, one-time delivery, capped at 25 mg
- Alteplase 0.9 mg/kg, sixty-minute infusion, capped at 90 mg
- Reteplase 10 units, duplicate injection, capped at 20 units
- Streptokinase 1.5 million, timed drip, capped at 60 minutes
Correct answer: Tenecteplase 0.25 mg/kg, one-time delivery, capped at 25 mg
Tenecteplase 0.25 mg/kg as a one-time delivery, capped at 25 mg, is the agent endorsed beside alteplase and preferred by many systems because the whole dose goes in as one push. Alteplase 0.9 mg/kg runs as a sixty-minute infusion capped at 90 mg, so it is not the single-push option the question asks for. Reteplase 10 units given as a duplicate injection capped at 20 units is a cardiac lytic with no stroke indication. Streptokinase 1.5 million units as a timed drip capped at 60 minutes is avoided in stroke because of its bleeding risk.
- A patient with a severe traumatic brain injury and signs of impending herniation is intubated and ventilated. To acutely lower intracranial pressure, the emergency nurse anticipates which respiratory target?
- Aggressive sustained hypocapnia as a fixed ventilator goal
- Brief mild hyperventilation as a short-term rescue measure
- Permissive deliberate hypercapnia as a safer pulmonary aim
- Apneic oxygenation alone as a total ventilation substitute
Correct answer: Brief mild hyperventilation as a short-term rescue measure
Brief mild hyperventilation as a short-term rescue measure is what the nurse anticipates: dropping carbon dioxide constricts cerebral vessels and buys minutes while osmotherapy or the operating room is readied. Aggressive sustained hypocapnia as a fixed ventilator goal is harmful, because that same vasoconstriction becomes ischemia once it is held for hours. Permissive deliberate hypercapnia as a safer pulmonary aim raises cerebral blood volume and worsens the very pressure it is meant to spare. Apneic oxygenation alone as a total ventilation substitute holds saturation up but clears no carbon dioxide, so it lowers nothing.
- A patient with a suspected stroke has a last-known-well time of 90 minutes ago, a fingerstick glucose of 38 mg/dL, and acute right-sided weakness with slurred speech. What is the emergency nurse's most appropriate immediate priority?
- Push the thrombolytic instantly and skip the glucose correction
- Correct the systolic hypertension and repeat the severity scale
- Treat the hypoglycemia now and reassess the neurologic deficits
- Flatten the stretcher permanently and withhold the oral liquids
Correct answer: Treat the hypoglycemia now and reassess the neurologic deficits
Treat the hypoglycemia now and reassess the neurologic deficits: a fingerstick of 38 mg/dL is a classic stroke mimic, and correcting it may clear the weakness and speech findings outright. Push the thrombolytic instantly and skip the glucose correction is dangerous, because lysing a mimic buys bleeding risk for no benefit. Correct the systolic hypertension and repeat the severity scale chases a number that is not the threat here. Flatten the stretcher permanently and withhold the oral liquids neither raises the sugar nor changes the deficits.
- A patient is found to have a fixed and dilated left pupil after a head injury, while the right pupil remains reactive. The emergency nurse recognizes that a unilateral fixed dilated pupil in this setting most likely results from compression of which structure?
- The facial nerve from a transverse temporal fracture
- The optic nerve from a severe retrobulbar hemorrhage
- The abducens nerve from a diffuse pressure elevation
- The oculomotor nerve from a lateral uncal herniation
Correct answer: The oculomotor nerve from a lateral uncal herniation
A blown pupil on one side after head injury points to the oculomotor nerve from a lateral uncal herniation, as the swollen temporal lobe crosses the tentorium and pins the third cranial nerve against it. The facial nerve from a transverse temporal fracture weakens the face and leaves pupil size untouched. The optic nerve from a severe retrobulbar hemorrhage blunts the direct light response yet spares the consensual one, so the pupil is not truly fixed. The abducens nerve from a diffuse pressure elevation gives a lateral gaze palsy with equal reactive pupils.
- A 22-year-old presents with periumbilical pain that has migrated over several hours to a fixed point in the right lower quadrant, roughly one-third of the way along a line drawn from the anterior superior iliac spine toward the umbilicus. Tenderness is maximal at that point. What is this anatomic landmark called?
- McBurney's point, the classic appendiceal landmark
- Murphy's point, the distended gallbladder landmark
- Cullen's point, the bruised periumbilical landmark
- Rovsing's point, the remote contralateral landmark
Correct answer: McBurney's point, the classic appendiceal landmark
McBurney's point, the classic appendiceal landmark, sits about one-third of the way from the right anterior superior iliac spine to the umbilicus, and maximal tenderness there marks the shift from visceral to parietal irritation. Murphy's point, the distended gallbladder landmark, lies under the right costal margin rather than in the lower quadrant. Cullen's point, the bruised periumbilical landmark, is not a tenderness site at all; the eponym names a discoloration seen in hemorrhage. Rovsing's point, the remote contralateral landmark, misnames a maneuver, since Rovsing's is a referred-pain sign and not a named spot.
- The emergency nurse is caring for a patient with suspected appendicitis. While palpating the left lower quadrant, the patient reports increased pain in the RIGHT lower quadrant. The emergency nurse documents this as which finding?
- Positive Cullen's sign, darkening umbilical ecchymosis
- Positive Rovsing's sign, referred contralateral aching
- Positive Kehr's sign, radiating diaphragmatic referral
- Positive Murphy's sign, arresting inspiratory guarding
Correct answer: Positive Rovsing's sign, referred contralateral aching
Pain felt on the right while the left side is pressed is a positive Rovsing's sign, referred contralateral aching that betrays peritoneal irritation around the appendix. Positive Cullen's sign, darkening umbilical ecchymosis, is a discoloration that emerges days into a bleed and cannot be elicited by palpation. Positive Kehr's sign, radiating diaphragmatic referral, follows blood or air under the diaphragm, not left-sided pressing. Positive Murphy's sign, arresting inspiratory guarding, appears when the right upper quadrant is pressed on inspiration.
- A patient with known cirrhosis arrives vomiting large volumes of bright red blood and is hypotensive. The emergency nurse anticipates a continuous infusion of which medication to reduce splanchnic blood flow while the patient awaits urgent endoscopy for esophageal varices?
- Pantoprazole, a proton-pump inhibitor
- Metoclopramide, a dopamine antagonist
- Octreotide, a somatostatin derivative
- Ondansetron, a nausea-focused blocker
Correct answer: Octreotide, a somatostatin derivative
Octreotide, a somatostatin derivative, is the infusion anticipated here, because it constricts the splanchnic bed, drops portal pressure, and slows the bleed until band ligation can be done. Pantoprazole, a proton-pump inhibitor, suppresses acid and does nothing to the portal circulation that drives a variceal bleed. Metoclopramide, a dopamine antagonist, speeds gastric emptying yet leaves the varices bleeding. Ondansetron, a nausea-focused blocker, quiets the vomiting reflex without touching the source of the blood loss.
- A cirrhotic patient with massive esophageal variceal hemorrhage continues to bleed despite octreotide and is too unstable for endoscopy, which is not immediately available. Which intervention provides temporary hemostasis as a bridge to definitive therapy?
- Gastric decompression with a wall-suction catheter
- Plasma repletion with a pressure-driven transfuser
- Ammonia clearance with a lactulose-rich irrigation
- Balloon tamponade with a Sengstaken-Blakemore tube
Correct answer: Balloon tamponade with a Sengstaken-Blakemore tube
Balloon tamponade with a Sengstaken-Blakemore tube presses directly on the torn esophageal and gastric varices and holds the patient until band ligation or a shunt can be arranged. Gastric decompression with a wall-suction catheter empties the stomach but puts no pressure on the bleeding vessels. Plasma repletion with a pressure-driven transfuser replaces what is lost without stopping the loss. Ammonia clearance with a lactulose-rich irrigation treats encephalopathy, an entirely different complication of cirrhosis.
- A patient with severe epigastric pain radiating to the back is found to have bluish discoloration around the umbilicus. The emergency nurse recognizes this periumbilical ecchymosis as which sign, and it suggests what underlying process?
- Cullen's sign, marking retroperitoneal or intra-abdominal hemorrhage
- Turner's sign, marking costovertebral or lateral-flank discoloration
- Kehr's sign, marking subdiaphragmatic or intraperitoneal stimulation
- Chvostek's sign, marking facial-muscle or neuromuscular excitability
Correct answer: Cullen's sign, marking retroperitoneal or intra-abdominal hemorrhage
Bruising around the umbilicus is Cullen's sign, marking retroperitoneal or intra-abdominal hemorrhage: blood from a hemorrhagic pancreatitis tracks along fascial planes into the subcutaneous tissue there, and it carries a poor prognosis. Turner's sign, marking costovertebral or lateral-flank discoloration, is the same bleeding in a different place and so is the wrong name for a periumbilical bruise. Kehr's sign, marking subdiaphragmatic or intraperitoneal stimulation, is referred shoulder pain and not a bruise at all. Chvostek's sign, marking facial-muscle or neuromuscular excitability, is a twitch elicited by tapping and reflects low calcium.
- During assessment of a patient with severe acute pancreatitis, the emergency nurse notes bluish-purple discoloration of both flanks. This Grey Turner's sign most directly indicates which complication?
- Emphysematous cholecystitis, a biliary complication
- Retroperitoneal hemorrhage, a vascular complication
- Prehepatic hypertension, a circulatory complication
- Mesenteric infarction, a microvascular complication
Correct answer: Retroperitoneal hemorrhage, a vascular complication
Flank bruising in severe pancreatitis indicates retroperitoneal hemorrhage, a vascular complication: blood from the necrotic gland dissects along fascial planes into the subcutaneous tissue of both flanks, and it correlates with high mortality. Emphysematous cholecystitis, a biliary complication, gives right upper quadrant pain and gas in the gallbladder wall, never flank color change. Prehepatic hypertension, a circulatory complication, produces ascites and varices instead of bruising. Mesenteric infarction, a microvascular complication, presents with pain out of proportion to the exam and leaves the flanks unmarked.
- A patient presents with hematemesis described as bright red blood and melena (black, tarry stools). The emergency nurse understands these findings together are most consistent with which source of bleeding?
- An engorged GI bleed distal to the anorectal line
- An ileal GI bleed deep to the Meckel diverticulum
- An upper GI bleed proximal to the Treitz ligament
- An eroded GI bleed lateral to the Drummond artery
Correct answer: An upper GI bleed proximal to the Treitz ligament
Hematemesis together with melena means an upper GI bleed proximal to the Treitz ligament, since blood that sits in the gut long enough to be digested turns the stool black and tarry while fresh blood in the vomit places the source above that landmark. An engorged GI bleed distal to the anorectal line is hemorrhoidal and never produces vomited blood. An ileal GI bleed deep to the Meckel diverticulum gives painless red rectal blood in a child, not hematemesis. An eroded GI bleed lateral to the Drummond artery is a colonic source and cannot explain the vomited blood.
- The emergency nurse is differentiating an upper from a lower GI bleed. Which finding most strongly favors a LOWER GI source rather than an upper one?
- Dark coffee-ground emesis, unaccompanied by dysphagia
- Blackened digested stool, unaccompanied by discomfort
- Epigastric ulcer pain, unaccompanied by regurgitation
- Bright red hematochezia, unaccompanied by hematemesis
Correct answer: Bright red hematochezia, unaccompanied by hematemesis
Bright red hematochezia, unaccompanied by hematemesis, points to a source below the ligament of Treitz, because blood leaving that low exits before acid and transit can digest it into black stool. Dark coffee-ground emesis, unaccompanied by dysphagia, is vomited blood already altered by acid and therefore an upper source. Blackened digested stool, unaccompanied by discomfort, is melena, which likewise means the blood traveled the whole gut from above. Epigastric ulcer pain, unaccompanied by regurgitation, describes the classic upper lesion itself rather than a lower one.
- A patient with right upper quadrant pain, fever, and nausea has the examiner's hand placed below the right costal margin and is asked to inhale deeply. The patient abruptly stops inspiration due to pain. The emergency nurse documents which positive sign, supporting what diagnosis?
- Positive Murphy's sign, supporting acute cholecystitis
- Positive Rovsing's sign, supporting early appendicitis
- Positive McBurney's sign, supporting frank peritonitis
- Positive Kehr's sign, supporting subphrenic irritation
Correct answer: Positive Murphy's sign, supporting acute cholecystitis
Inspiratory arrest on deep palpation under the right costal margin is a positive Murphy's sign, supporting acute cholecystitis, because the inflamed gallbladder descends onto the examiner's hand and the breath stops. A positive Rovsing's sign, supporting early appendicitis, is right-sided pain provoked by pressing the LEFT lower quadrant, which was not done here. A positive McBurney's sign, supporting late peritonitis, names point tenderness in the right lower quadrant rather than beneath the ribs. A positive Kehr's sign, supporting subphrenic irritation, is referred shoulder pain and bears no relation to arrested breathing.
- A 40-year-old with severe epigastric pain radiating to the back, nausea, and vomiting has a lipase level three times the upper limit of normal. The emergency nurse recognizes that the single most useful laboratory test for confirming acute pancreatitis is:
- Pancreatic amylase, more diagnostic than lipase
- Serum lipase, more informative than radiography
- Indirect bilirubin, more consistent than lipase
- Alkaline phosphatase, more reliable than lipase
Correct answer: Serum lipase, more informative than radiography
Serum lipase, more informative than radiography, is the single most useful confirmatory study: it rises early, stays up longer than the other pancreatic enzymes, and a threefold elevation with characteristic pain settles the diagnosis. Pancreatic amylase, more diagnostic than lipase, inverts the truth, since amylase is the less specific marker and falls back to baseline sooner. Indirect bilirubin, more consistent than lipase, fails because bilirubin reports biliary obstruction or hemolysis and can be unremarkable here. Alkaline phosphatase, more reliable than lipase, fails for the same reason; that enzyme tracks cholestasis, not pancreatic injury.
- A patient with chronic alcohol use presents with severe pancreatitis. Which laboratory derangement is an emergency priority because it can precipitate tetany and cardiac dysrhythmias?
- Hypernatremia, driven by free-water depletion
- Hyperkalemia, driven by intracellular release
- Hypocalcemia, driven by tissue saponification
- Hypochloremia, driven by nasogastric drainage
Correct answer: Hypocalcemia, driven by tissue saponification
Hypocalcemia, driven by tissue saponification, is the emergency derangement here: calcium is consumed in areas of peripancreatic fat necrosis, and the fall produces Chvostek and Trousseau signs, tetany, QT prolongation, and dysrhythmias. Hypernatremia, driven by free-water depletion, is not the characteristic pancreatic disturbance and does not cause tetany. Hyperkalemia, driven by intracellular release, threatens the heart but is not the shift pancreatitis classically produces. Hypochloremia, driven by nasogastric drainage, is a consequence of treatment and carries no tetany risk.
- A patient with sudden, severe, diffuse abdominal pain has a rigid, board-like abdomen with rebound tenderness and absent bowel sounds. The emergency nurse recognizes these as hallmark signs of which condition?
- Nonperforated appendicitis, a limited process
- Uncomplicated gastroenteritis, a mild process
- Obstructive cholelithiasis, a colicky process
- Generalized peritonitis, a widespread process
Correct answer: Generalized peritonitis, a widespread process
A rigid, board-like abdomen with rebound tenderness and silent bowel sounds is generalized peritonitis, a widespread process in which a perforated viscus spills its contents across the whole peritoneal surface. Nonperforated appendicitis, a limited process, gives point tenderness in one quadrant rather than diffuse rigidity. Uncomplicated gastroenteritis, a mild process, produces cramps with hyperactive rather than silent sounds. Obstructive cholelithiasis, a colicky process, waxes and wanes under the right ribs and leaves the abdomen soft.
- A patient with a history of diverticulosis presents with left lower quadrant pain, low-grade fever, and a tender LLQ mass. The emergency nurse recognizes this presentation as most consistent with:
- Diverticulitis, a colonic inflammation
- Appendicitis, a localized inflammation
- Cholecystitis, a purulent inflammation
- Esophagitis, a submucosal inflammation
Correct answer: Diverticulitis, a colonic inflammation
Left lower quadrant pain with low-grade fever and a tender mass in someone known to have diverticulosis is diverticulitis, a colonic inflammation, because an existing pouch has become obstructed and infected. Appendicitis, a localized inflammation, sits in the right lower quadrant and does not arise from a diverticular pouch. Cholecystitis, a purulent inflammation, produces right upper quadrant pain radiating to the shoulder rather than a left-sided mass. Esophagitis, a submucosal inflammation, causes retrosternal burning and cannot produce a palpable abdominal mass at all.
- A patient with a small bowel obstruction is vomiting and has marked abdominal distention. Beyond pain control, which nursing intervention is the immediate priority for decompression?
- Give a bulk laxative to speed bowel transit
- Pass a nasogastric tube to low wall suction
- Lay a warm compress to soothe tender muscle
- Offer a clear liquid to shift stalled fluid
Correct answer: Pass a nasogastric tube to low wall suction
Decompression of a small bowel obstruction means to pass a nasogastric tube to low wall suction, which removes the swallowed air and retained secretions above the blockage, relieves the distention, and lowers the risk of vomiting and aspiration while the cause is worked up. Give a bulk laxative to speed bowel transit adds volume above a mechanical block and can drive perforation. Lay a warm compress to soothe tender muscle treats the surface and leaves the distended loops exactly as they were. Offer a clear liquid to shift stalled fluid adds to what already cannot pass and worsens the vomiting.
- A patient reports high-pitched, tinkling bowel sounds early in their presentation that have now become absent, along with worsening distention. The emergency nurse interprets the progression to absent bowel sounds as a sign of:
- A shift toward restored hydration and perfusion
- A shift toward relieved obstruction and passage
- A shift toward mural ischemia and strangulation
- A shift toward regular peristalsis and recovery
Correct answer: A shift toward mural ischemia and strangulation
High-pitched tinkling sounds that fall silent while distention worsens signal a shift toward mural ischemia and strangulation, because the gut has stopped fighting the blockage and the wall itself is losing its blood supply. A shift toward restored hydration and perfusion misreads a late and dangerous silence as improvement. A shift toward relieved obstruction and passage would be accompanied by flatus, softening distention and returning comfort, none of which is present. A shift toward regular peristalsis and recovery mistakes absent sounds for normal ones, when normal bowel sounds are audible rather than silent.
- A 3-year-old presents with intermittent severe crying with legs drawn up, vomiting, and a stool that looks like red jelly. A sausage-shaped mass is palpable in the right abdomen. The emergency nurse suspects:
- Appendicitis, an obstructive appendix
- Malrotation, an obstructed attachment
- Enterocolitis, an infected epithelium
- Intussusception, a telescoped segment
Correct answer: Intussusception, a telescoped segment
Colicky screaming with legs drawn up, vomiting, currant jelly stool and a sausage-shaped mass in a toddler is intussusception, a telescoped segment, where one length of bowel has drawn itself into the next and dragged its blood supply with it. Appendicitis, an obstructive appendix, is uncommon at this age and gives steady rather than episodic pain with no palpable sausage. Malrotation, an obstructed attachment, presents with bilious vomiting and a sudden catastrophic course rather than intermittent spells with well periods. Enterocolitis, an infected epithelium, causes watery or bloody diarrhea without a defined mass.
- A patient with end-stage liver disease and cirrhosis presents confused, with asterixis (a flapping tremor) and a musty breath odor. The emergency nurse anticipates administration of which medication to reduce ammonia and treat hepatic encephalopathy?
- Lactulose, which acidifies the luminal contents
- Octreotide, which narrows the mesenteric vessel
- Pantoprazole, which slows the gastric secretion
- Phytonadione, which renews the hepatic proteins
Correct answer: Lactulose, which acidifies the luminal contents
The medication anticipated for hepatic encephalopathy is lactulose, which acidifies the luminal contents so that absorbable ammonia is converted to the trapped ammonium ion and carried out in stool, lowering the level that is confusing the patient. Octreotide, which narrows the mesenteric vessel, is used to lower portal pressure in variceal bleeding and does nothing for encephalopathy. Pantoprazole, which slows the gastric secretion, protects mucosa and has no effect on nitrogen handling. Phytonadione, which renews the hepatic proteins, corrects the coagulopathy of liver failure but leaves the encephalopathy untouched.
- A patient with cirrhosis has massive ascites and new fever, diffuse abdominal tenderness, and worsening encephalopathy. The emergency nurse anticipates a diagnostic paracentesis primarily to evaluate for which complication?
- Esophageal varices, an outpouched collateral
- Spontaneous peritonitis, an infected exudate
- Acute cholecystitis, a distended gallbladder
- Bowel intussusception, an obstructed segment
Correct answer: Spontaneous peritonitis, an infected exudate
Fever, diffuse tenderness and deepening confusion in a patient with long-standing ascites point to spontaneous peritonitis, an infected exudate, and the paracentesis is done chiefly to sample that fluid for cell count and culture so treatment can start. Esophageal varices, an outpouched collateral, is diagnosed by endoscopy and would present with bleeding rather than fever. Acute cholecystitis, a distended gallbladder, gives focal right upper quadrant pain and is not sampled by tapping the abdomen. Bowel intussusception, an obstructed segment, is a pediatric obstruction and does not explain fever with ascitic tenderness.
- A patient with hematemesis has a heart rate of 124, blood pressure of 86/54, and is pale and diaphoretic. After establishing airway and breathing, what is the emergency nurse's immediate priority?
- Offer two iron-bearing capsules and begin daily replacement
- Obtain two guaiac-coated specimens and begin stool analysis
- Insert two wide-bore cannulas and begin rapid resuscitation
- Arrange two same-day referrals and begin elective endoscopy
Correct answer: Insert two wide-bore cannulas and begin rapid resuscitation
A patient vomiting blood who is tachycardic, hypotensive, pale and diaphoretic is in hemorrhagic shock, so once airway and breathing are secure the priority is to insert two wide-bore cannulas and begin rapid resuscitation, because short wide catheters deliver volume far faster than any long narrow line and blood products can follow through them. Offer two iron-bearing capsules and begin daily replacement treats chronic anemia over weeks while the patient is losing volume by the minute. Obtain two guaiac-coated specimens and begin stool analysis confirms bleeding that is already visible in the emesis. Arrange two same-day referrals and begin elective endoscopy defers definitive care that this patient needs before the circulation is restored.
- A patient with chronic NSAID use presents with epigastric pain and coffee-ground emesis. The emergency nurse recognizes the most likely source of bleeding as:
- An open anal fissure in the sphincter
- An inflamed pouch in the sigmoid wall
- An engorged rectal vein in the margin
- An eroded peptic ulcer in the stomach
Correct answer: An eroded peptic ulcer in the stomach
Epigastric pain with coffee-ground emesis in someone taking anti-inflammatory drugs long term points to an eroded peptic ulcer in the stomach, since those drugs strip the prostaglandin defense of the mucosa and the dark grounds are blood already altered by acid. An open anal fissure in the sphincter and an engorged rectal vein in the margin both sit far below the ligament of Treitz and produce bright blood passed rectally, not vomited. An inflamed pouch in the sigmoid wall bleeds into the colon and cannot present as emesis. Only an upper source explains blood that has been in contact with gastric acid.
- A child swallowed a coin-shaped object that, on x-ray, shows a double-ring (halo) appearance. The emergency nurse recognizes this finding requires urgent endoscopic removal because it most likely represents:
- The button battery
- The polymer marble
- The stalled morsel
- The flattened coin
Correct answer: The button battery
A double ring or halo on the radiograph is the signature of the button battery, whose stepped edge casts two concentric shadows, and it demands urgent endoscopic removal because current flowing across the mucosa can burn through the esophagus within a couple of hours. The polymer marble is radiolucent and would not appear on the film at all. The stalled morsel of food is likewise invisible on a plain radiograph and is managed less urgently unless secretions cannot be handled. The flattened coin casts a single uniform disc with a smooth edge, which is precisely the appearance the halo distinguishes it from.
- An adult presents with sudden inability to swallow and drooling after eating steak, reporting the sensation of food stuck in the chest. The emergency nurse recognizes this esophageal food bolus impaction is most concerning when accompanied by:
- Eased passage after several sips, meaning a cleared lumen
- Retained saliva at the mouth, meaning a complete blockage
- Mild burning behind the sternum, meaning a settled reflux
- Free handling of thin liquids, meaning an unblocked lumen
Correct answer: Retained saliva at the mouth, meaning a complete blockage
The finding that raises this from urgent to emergent is retained saliva at the mouth, meaning a complete blockage, because a patient who cannot even swallow spit has an esophagus that is fully occluded and is at immediate risk of aspirating what pools above it. Eased passage after several sips, meaning a cleared lumen, describes a bolus that has already moved on. Mild burning behind the sternum, meaning a settled reflux, is a common background symptom and carries no airway threat. Free handling of thin liquids, meaning an unblocked lumen, shows the obstruction is partial, which allows time for a planned rather than immediate intervention.
- A patient with cirrhosis has a markedly distended abdomen with a fluid wave and shifting dullness. The emergency nurse identifies this accumulation of fluid in the peritoneal cavity as:
- Peritonitis, a serosal infection
- Obstruction, an intestinal block
- Ascites, an abdominal collection
- Hepatomegaly, an enlarged viscus
Correct answer: Ascites, an abdominal collection
Free fluid held in the peritoneal cavity of a patient with cirrhosis is ascites, an abdominal collection, and the fluid wave with shifting dullness is the bedside sign of a mobile fluid layer rather than a solid mass. Peritonitis, a serosal infection, produces rigidity, guarding and fever rather than a mobile wave. Obstruction, an intestinal block, distends the abdomen with gas and gives tympany on percussion, not shifting dullness. Hepatomegaly, an enlarged viscus, is a firm palpable edge below the ribs and does not move with position.
- A patient with severe abdominal trauma from a steering wheel injury develops increasing abdominal distention, rigidity, and hypotension. The emergency nurse's highest priority is to:
- Start regular analgesia and plan for an early discharge
- Start binder pressure and watch for an overnight change
- Start barium contrast and send for an unhurried reading
- Start volume replacement and call for an urgent surgeon
Correct answer: Start volume replacement and call for an urgent surgeon
Growing distention with rigidity and falling pressure after a steering wheel impact is intra-abdominal hemorrhage, so the highest priority is to start volume replacement and call for an urgent surgeon, because only an operation stops the bleeding and resuscitation buys the time to reach it. Start regular analgesia and plan for an early discharge sends home a patient who is actively bleeding. Start binder pressure and watch for an overnight change delays the one intervention that can help while the abdomen fills. Start barium contrast and send for an unhurried reading is contraindicated with suspected perforation and wastes the interval in which the patient is salvageable.
- A patient is diagnosed with hepatitis A after eating at a restaurant linked to an outbreak. The emergency nurse teaches that hepatitis A is most commonly transmitted by which route?
- Fecal-oral, primarily through contaminated food and water
- Airborne-droplet, primarily through common air and speech
- Blood-exposure, primarily through shared needles and gear
- Sexual-contact, primarily through intimate skin and fluid
Correct answer: Fecal-oral, primarily through contaminated food and water
Hepatitis A spreads fecal-oral, primarily through contaminated food and water, when the virus shed in stool reaches another person by an unwashed hand or an infected food handler, which is why restaurant clusters occur. Airborne-droplet, primarily through common air and speech, describes measles or tuberculosis and no enteric virus of this kind. Blood-exposure, primarily through shared needles and gear, is the route for hepatitis B and C, which persist in blood rather than stool. Sexual-contact, primarily through intimate skin and fluid, can occasionally transmit hepatitis A through oral-anal exposure, but that remains a fecal-oral pathway and is not the usual mode.
- A patient with acute pancreatitis is at risk for which serious pulmonary complication that the emergency nurse should monitor for with continuous pulse oximetry?
- Chronic obstructive airways disease (COPD)
- Acute respiratory distress syndrome (ARDS)
- Primary spontaneous pleural collapse (PSP)
- Severe pulmonary artery hypertension (PAH)
Correct answer: Acute respiratory distress syndrome (ARDS)
The pulmonary complication to watch for in acute pancreatitis is acute respiratory distress syndrome (ARDS), because circulating enzymes and inflammatory mediators injure the alveolar capillary membrane and flood the alveoli, which is why continuous oximetry is used to catch the falling saturation early. Chronic obstructive airways disease (COPD) is a long-standing condition that pancreatitis neither causes nor unmasks in this way. Primary spontaneous pleural collapse (PSP) arises from a ruptured bleb in a tall young smoker and is unrelated to pancreatic inflammation. Severe pulmonary artery hypertension (PAH) develops over months to years and is not an acute complication of a single episode.
- A patient presents with crampy abdominal pain, no flatus or stool passage for two days, and an x-ray showing dilated loops of bowel with air-fluid levels. The emergency nurse recognizes this as the classic radiographic picture of:
- Biliary cholelithiasis, a lodged pebble
- Acute appendicitis, an inflamed segment
- Mechanical obstruction, a blocked lumen
- Viral hepatitis, an inflamed hepatocyte
Correct answer: Mechanical obstruction, a blocked lumen
Crampy pain, no flatus or stool for two days and dilated loops with air-fluid levels on the film is the classic picture of mechanical obstruction, a blocked lumen, where gas and fluid separate into layers above a physical block. Biliary cholelithiasis, a lodged pebble, gives colic after fatty meals and is seen on ultrasound rather than as dilated loops. Acute appendicitis, an inflamed segment, migrates to the right lower quadrant with guarding and does not produce this radiographic pattern. Viral hepatitis, an inflamed hepatocyte, presents with jaundice and elevated transaminases, with no obstructive picture on the abdominal film.
- A patient is suspected of having appendicitis. To minimize the risk of perforation, the emergency nurse should AVOID which intervention before surgical evaluation?
- Starting a saline infusion to the forearm
- Giving a prescribed dosage to the patient
- Sending a routine sample to the chemistry
- Applying a heated compress to the abdomen
Correct answer: Applying a heated compress to the abdomen
The intervention to avoid is applying a heated compress to the abdomen, because heat dilates local vessels and accelerates the inflammatory process in an already distended appendix, raising the chance that it perforates before the surgeon sees it. Starting a saline infusion to the forearm is standard preparation for an operation and supports the circulation. Giving a prescribed dosage to the patient covers ordered antibiotics, which reduce rather than raise perforation risk. Sending a routine sample to the chemistry supplies the baseline studies the surgical team needs and does nothing to the appendix itself.
- A child presents with recurrent, stereotyped episodes of severe vomiting lasting hours to days, with complete return to baseline health between episodes and no structural cause found. The emergency nurse recognizes this pattern as:
- Cyclic vomiting from an uncertain trigger
- Appendiceal vomiting from an inflamed tip
- Obstructive vomiting from an occluded gut
- Ulcerative vomiting from an eroded mucosa
Correct answer: Cyclic vomiting from an uncertain trigger
Stereotyped bouts of severe vomiting that last hours to days with complete wellness in between and no structural cause is cyclic vomiting from an uncertain trigger, the pattern recognized as cyclic vomiting syndrome, and the well interval between attacks is what defines it. Ulcerative vomiting from an eroded mucosa would give persistent epigastric pain and often altered blood in the emesis rather than clean recovery. Appendiceal vomiting from an inflamed tip follows pain that migrates and does not remit spontaneously. Obstructive vomiting from an occluded gut is a single progressive episode with distention and absent stool, and a structural cause would have been found.
- A patient with esophageal varices is being treated. The emergency nurse understands that the underlying cause of variceal formation is:
- Chronic irritation from repeated ulceration
- Portal hypertension from advanced cirrhosis
- Bacterial colonization from gastric species
- Peritoneal infection from unsterile ascites
Correct answer: Portal hypertension from advanced cirrhosis
Varices form because of portal hypertension from advanced cirrhosis: scarring raises resistance through the liver, so blood is forced back into collateral channels and the thin submucosal veins of the lower esophagus swell under a pressure they were never built for. Chronic irritation from repeated ulceration erodes mucosa and causes ulcers rather than dilated veins. Bacterial colonization from gastric species drives peptic ulcer disease, a different lesion with a different mechanism. Peritoneal infection from unsterile ascites is a complication that shares the same underlying cirrhosis but does not itself create the collateral circulation.
- A patient with suspected bowel perforation has free air under the diaphragm on an upright chest x-ray. After resuscitation, the emergency nurse recognizes the definitive management is:
- Elective endoscopic survey, a later inspection
- Supportive bowel rest, a conservative approach
- Emergent surgical repair, an operative closure
- Empirical antibiotic therapy, a systemic trial
Correct answer: Emergent surgical repair, an operative closure
Free air beneath the diaphragm confirms that the gut has opened into the peritoneum, so after resuscitation the definitive management is emergent surgical repair, an operative closure, because only an operation shuts the hole and washes out the contamination already spilled. Elective endoscopic survey, a later inspection, insufflates a perforated bowel and delays the repair. Supportive bowel rest, a conservative approach, treats an inflammatory process that has not perforated and cannot close a hole. Empirical antibiotic therapy, a systemic trial, is a necessary adjunct that covers the spillage, but it is given alongside the operation rather than instead of it.
- A patient presents with right upper quadrant pain after a fatty meal, fever, and a white blood cell count of 15,000. Ultrasound shows gallbladder wall thickening and pericholecystic fluid. The emergency nurse recognizes this as:
- Acute cholecystitis
- Severe pancreatitis
- Alcoholic hepatitis
- Mild diverticulitis
Correct answer: Acute cholecystitis
Acute cholecystitis explains the whole picture: right upper quadrant pain after a fatty meal, fever, leukocytosis, and an ultrasound showing a thickened gallbladder wall with pericholecystic fluid. Severe pancreatitis would give epigastric pain boring into the back with a raised lipase, not a thickened gallbladder. Alcoholic hepatitis produces jaundice and transaminase elevation without pericholecystic fluid. Mild diverticulitis causes left lower quadrant pain and tenderness, so it cannot account for these right upper quadrant findings.
- A patient with blunt abdominal trauma to the left upper quadrant reports left shoulder pain that worsens when lying flat. The emergency nurse recognizes this referred pain (Kehr's sign) most likely indicates injury to which organ?
- Hepatic injury, with thick bile inflaming the gallbladder
- Splenic injury, with fresh blood irritating the diaphragm
- Gastric injury, with acid contents eroding the peritoneum
- Pancreatic injury, with active enzyme burning the omentum
Correct answer: Splenic injury, with fresh blood irritating the diaphragm
Kehr's sign is left shoulder pain generated when fresh blood irritating the diaphragm stimulates the phrenic nerve, so after blunt left upper quadrant trauma the source is splenic injury with intraperitoneal bleeding. Hepatic injury lies on the right side and refers to the right shoulder, and thick bile inflaming the gallbladder causes biliary colic rather than shoulder pain. Gastric injury with acid contents eroding the peritoneum gives diffuse rigidity and generalized tenderness, not an isolated referred shoulder ache. Pancreatic injury with active enzyme burning the omentum is retroperitoneal and refers to the back.
- A woman at 34 weeks gestation arrives with painless, bright-red vaginal bleeding. Her abdomen is soft and nontender, the uterus is relaxed between palpations, and fetal heart tones are reassuring. Which condition does this presentation most strongly suggest, and what should the emergency nurse avoid doing?
- Placenta previa; avoid prolonged oxytocin infusion before vaginal blood loss stabilizes
- Placental abruption; avoid routine tocolytic therapy before vaginal muscle tone returns
- Placenta previa; avoid digital vaginal exams before ultrasound shows placental position
- Placental abruption; avoid further intravenous fluids before vaginal blood type arrives
Correct answer: Placenta previa; avoid digital vaginal exams before ultrasound shows placental position
The picture is placenta previa, and the nurse must avoid digital vaginal exams before ultrasound shows placental position, because probing a placenta lying over the cervical os can trigger catastrophic hemorrhage. Painless bright-red bleeding with a soft, relaxed, nontender uterus is the classic previa picture, so placental abruption is the wrong condition: abruption gives painful darker bleeding with a firm, irritable uterus. Prolonged oxytocin infusion has no place in this presentation at all, so withholding it until vaginal blood loss stabilizes is not the point. Routine tocolytic therapy is likewise not what is withheld while vaginal muscle tone returns. Further intravenous fluids should be running, not avoided, while the vaginal blood type arrives.
- A patient at 37 weeks gestation presents with a blood pressure of 168/112 mmHg, severe headache, and brisk reflexes, and is diagnosed with preeclampsia with severe features. The provider orders magnesium sulfate. Which regimen reflects the standard dosing the emergency nurse should anticipate?
- Push one to two grams IV over eight to fifteen minutes, then repeat five to six grams hourly
- Bolus nine to ten grams IV over three to seven minutes, then taper two to three grams hourly
- Drip six to ten grams IV over fifty to ninety minutes, then adjust two to three grams hourly
- Load four to six grams IV over twenty to thirty minutes, then infuse one to two grams hourly
Correct answer: Load four to six grams IV over twenty to thirty minutes, then infuse one to two grams hourly
The standard seizure-prophylaxis regimen is to load four to six grams IV over twenty to thirty minutes and then infuse one to two grams hourly. Magnesium is given to prevent eclamptic seizures, not to lower pressure, which is managed separately with labetalol or hydralazine. To push one to two grams over eight to fifteen minutes and then repeat five to six grams hourly under-loads the patient and then runs a maintenance rate high enough to cause toxicity. To bolus nine to ten grams over three to seven minutes and then taper two to three grams hourly delivers a dangerously rapid load. To drip six to ten grams over fifty to ninety minutes and then adjust two to three grams hourly loads far too slowly and too heavily.
- A postpartum patient receiving an intravenous magnesium sulfate infusion for preeclampsia becomes lethargic with slurred speech. The emergency nurse finds absent patellar reflexes and a respiratory rate of 9 breaths per minute. After stopping the infusion, which intervention should the nurse anticipate as the priority?
- Intravenous calcium gluconate
- Intravenous magnesium sulfate
- Intravenous naloxone infusion
- Intravenous potassium acetate
Correct answer: Intravenous calcium gluconate
Intravenous calcium gluconate is the antidote for magnesium toxicity and is the priority once the infusion has been stopped, because calcium competes with magnesium at the neuromuscular junction and reverses the areflexia and hypoventilation. More intravenous magnesium sulfate would deepen the very toxicity that the lost reflexes and a rate of nine already signal. Intravenous naloxone infusion reverses opioids and does nothing for magnesium-induced respiratory depression. Intravenous potassium acetate corrects a potassium deficit and has no effect on an excess of magnesium.
- A pregnant patient previously diagnosed with preeclampsia with severe features now has a witnessed generalized tonic-clonic seizure in the emergency department. Which statement best describes how this event changes her diagnosis, and what is the immediate nursing priority?
- The diagnosis is now hypertension; deepen the sedation, limit her fluids, and titrate magnesium
- The diagnosis is now eclampsia; guard the airway, position her sideways, and continue magnesium
- The diagnosis is mild preeclampsia; watch the seizure, elevate her head, and postpone magnesium
- The diagnosis is now eclampsia; reduce the pressure, restrain her limbs, and withhold magnesium
Correct answer: The diagnosis is now eclampsia; guard the airway, position her sideways, and continue magnesium
A new generalized convulsion in preeclampsia means the diagnosis is now eclampsia, and the immediate priority is to guard the airway, position her sideways, and continue magnesium, which is the drug of choice for eclamptic seizures. Calling this mild preeclampsia ignores the convulsion, and nobody should simply watch the seizure, elevate her head, and postpone magnesium. Restraint injures rather than helps, so a plan to reduce the pressure, restrain her limbs, and withhold magnesium is wrong on both counts; severe-range pressure is treated, but after the airway is secure. Nor is this now hypertension, so there is no reason to deepen the sedation, limit her fluids, and titrate magnesium against a pressure target.
- A man presents with a painful, rigid erection lasting more than four hours that began without sexual stimulation and is unrelieved. Aspiration confirms ischemic (low-flow) priapism. According to current AUA/SMSNA guidance, which first-line intervention should the emergency nurse anticipate?
- Corporal aspiration with cryotherapy, followed by incremental oral pseudoephedrine preparations
- Corporal aspiration with heparin, followed by prophylactic parenteral anticoagulation protocols
- Corporal aspiration with irrigation, followed by direct intracavernosal phenylephrine injection
- Corporal aspiration with drainage, followed by repeated surgical corporoglanular reconstruction
Correct answer: Corporal aspiration with irrigation, followed by direct intracavernosal phenylephrine injection
First-line care for ischemic priapism is corporal aspiration with irrigation, followed by direct intracavernosal phenylephrine injection, repeated until detumescence. Low-flow priapism behaves like a compartment syndrome, so ischemia beyond roughly four to six hours threatens permanent erectile dysfunction. Cryotherapy, followed by incremental oral pseudoephedrine preparations, is far too weak for a rigid ischemic corpus and simply wastes time. Heparin, followed by prophylactic parenteral anticoagulation protocols, does not move stagnant blood out of the corpora and adds bleeding risk. Drainage, followed by repeated surgical corporoglanular reconstruction, inverts the sequence, because shunting is reserved for failure of aspiration and phenylephrine.
- An adolescent reports sudden, severe left scrotal pain that woke him about five hours ago, with nausea and a high-riding, transversely lying testis. The emergency nurse recognizes suspected testicular torsion. Why does this presentation demand emergent urologic involvement rather than routine workup?
- Salvage nears 90 to 100 percent inside 6 hours and holds after 12 hours, so radiology proceeds ahead
- Salvage nears 90 to 100 percent inside 6 hours and rises after 12 hours, so antibiotics reverse harm
- Salvage nears 90 to 100 percent inside 6 hours and climbs after 12 hours, so observers delay surgery
- Salvage nears 90 to 100 percent inside 6 hours and fails after 12 hours, so surgeons explore quickly
Correct answer: Salvage nears 90 to 100 percent inside 6 hours and fails after 12 hours, so surgeons explore quickly
Salvage nears 90 to 100 percent inside 6 hours of pain onset and then fails after 12 hours, which is exactly why surgeons explore quickly instead of completing a leisurely workup. The twisted cord strangles its own blood supply, so each further hour costs viable tissue. Salvage never holds at that level once the window passes, so letting radiology proceed ahead of urology wastes the salvageable interval. Nothing rises later either: antibiotics reverse infection such as epididymitis, not ischemia, and cannot undo the harm of a twisted cord. Salvage never climbs with time, so observers who delay surgery hoping for spontaneous detorsion lose the testis.
- An emergency nurse is caring for a severely agitated patient with hyperactive delirium (formerly called excited delirium) who is restrained and has just received an intramuscular sedative. Evidence shows the most lethal period for these patients occurs at a specific point in care. When should the nurse intensify physiologic monitoring?
- During active sedation and shortly after physical restraint, when sudden collapse peaks
- During silent recovery and hours after laboratory results, when gradual hypoxemia peaks
- During settled sleep and later after complete stillness, when shallow respiration peaks
- During renewed agitation and soon after failed medication, when repeated struggle peaks
Correct answer: During active sedation and shortly after physical restraint, when sudden collapse peaks
The danger window is during active sedation and shortly after physical restraint, when sudden collapse peaks, so continuous cardiac, oxygen saturation and temperature monitoring belongs at that exact moment. Waiting for silent recovery and the hours after laboratory results lets gradual hypoxemia peaks pass unwitnessed, long past the lethal period. Watching through settled sleep and later after complete stillness, when shallow respiration peaks, misses the arrests that happen while the patient is still being subdued. Reserving attention for renewed agitation and soon after failed medication, when repeated struggle peaks, ignores the patients who arrest quietly rather than fighting.
- A patient with hyperactive delirium is profoundly hyperthermic at 41 degrees Celsius, severely acidotic, and combative. Beyond chemical sedation, which physiologic problem most urgently drives the emergency nurse's interventions because it directly contributes to sudden death in this syndrome?
- Slight systolic hypertension and tachycardia from brief physical struggles
- Severe metabolic acidosis and hyperthermia from sustained extreme exertion
- Striking pupillary dilation and diaphoresis from excess adrenergic outflow
- Moderate volume depletion and hypovolemia from prolonged fluid restriction
Correct answer: Severe metabolic acidosis and hyperthermia from sustained extreme exertion
Severe metabolic acidosis and hyperthermia from sustained extreme exertion are the physiologic drivers of sudden death in this syndrome, so active cooling, fluids, and enough sedation to stop the exertion take priority. Slight systolic hypertension and tachycardia from brief physical struggles are expected findings that do not by themselves kill. Striking pupillary dilation and diaphoresis from excess adrenergic outflow are signs of the catecholamine surge, not the derangement that stops the heart. Moderate volume depletion and hypovolemia from prolonged fluid restriction matter, but they are corrected alongside the acidosis rather than ahead of it.
- An emergency nurse must distinguish chemical restraint from physical restraint when documenting an intervention. A patient receives intramuscular haloperidol specifically to control violent behavior rather than to treat a diagnosed psychiatric condition. How is this intervention best classified?
- Physical restraint, because the chemical restricts movements rather than a diagnosed condition
- Seclusion restraint, because the chemical enforces isolation rather than a diagnosed condition
- Chemical restraint, because the medication targets agitation rather than a diagnosed condition
- Behavioral restraint, because the chemical prevents violence rather than a diagnosed condition
Correct answer: Chemical restraint, because the medication targets agitation rather than a diagnosed condition
This is chemical restraint, because the medication targets agitation rather than a diagnosed condition, which is precisely the regulatory definition and which triggers restraint monitoring and documentation. Physical restraint names a device, so calling it physical restraint because the chemical restricts movements misreads the category. Seclusion restraint would mean involuntary confinement alone in a room, and a chemical that enforces isolation is not what happened here. Behavioral restraint is merely the umbrella heading, so saying the chemical prevents violence rather than a diagnosed condition states the purpose without naming the specific category the record demands.
- An emergency nurse reviews restraint policy with a new colleague. Which statement correctly contrasts chemical restraint and physical restraint regarding monitoring obligations?
- Chemical and physical restraint need complete records of the patient's diagnosis, dosages, and duration
- Chemical and physical restraint need scheduled scores of the patient's sedation, alertness, and comfort
- Chemical and physical restraint need different standards of the patient's drugs, devices, and paperwork
- Chemical and physical restraint need repeated checks of the patient's safety, circulation, and response
Correct answer: Chemical and physical restraint need repeated checks of the patient's safety, circulation, and response
Each is a restrictive intervention with its own hazards, so chemical and physical restraint need repeated checks of the patient's safety, circulation, and response for as long as the intervention lasts. Saying they need complete records of the patient's diagnosis, dosages, and duration confuses documentation with monitoring; the record is required but never substitutes for the bedside assessment. Scheduled scores of the patient's sedation, alertness, and comfort track depth of sedation alone and miss the neurovascular compromise that develops under a device. Claiming they need different standards of the patient's drugs, devices, and paperwork is the common misconception that a drug somehow escapes restraint monitoring, when in fact both carry the same obligation.
- A patient on a serotonergic antidepressant who recently added a second serotonergic drug presents with agitation, diaphoresis, tremor, and clonus that is more pronounced in the lower extremities. The emergency nurse recognizes which neuromuscular finding as most characteristic of serotonin syndrome rather than neuroleptic malignant syndrome?
- Brisk clonus in the lower limbs with hyperreflexia
- Absent clonus in the lower limbs with hyporeflexia
- Depressed clonus in the lower limbs with areflexia
- Irregular clonus in the lower limbs with paralysis
Correct answer: Brisk clonus in the lower limbs with hyperreflexia
Brisk clonus in the lower limbs with hyperreflexia is the hallmark of serotonin syndrome and the single most useful neuromuscular sign separating it from neuroleptic malignant syndrome. Neuroleptic malignant syndrome instead shows absent clonus in the lower limbs with hyporeflexia against a background of uniform lead-pipe rigidity. Depressed clonus in the lower limbs with areflexia points away from any hyperexcitable state and suggests a neuropathy or magnesium excess. Irregular clonus in the lower limbs with paralysis fits neither toxidrome and would raise concern for a structural or peripheral nerve lesion.
- An emergency nurse compares serotonin syndrome and neuroleptic malignant syndrome to anticipate care. Which pairing of typical causative medication classes is correct?
- Serotonin syndrome from antipsychotic tablets; neuroleptic malignant syndrome from antidepressant combinations
- Serotonin syndrome from serotonergic antidepressants; neuroleptic malignant syndrome from dopamine antagonists
- Serotonin syndrome from benzodiazepine sedatives; neuroleptic malignant syndrome from benzodiazepine hypnotics
- Serotonin syndrome from anticholinergic prescriptions; neuroleptic malignant syndrome from lithium supplements
Correct answer: Serotonin syndrome from serotonergic antidepressants; neuroleptic malignant syndrome from dopamine antagonists
Serotonin syndrome comes from serotonergic antidepressants such as SSRIs, SNRIs and their combinations, while neuroleptic malignant syndrome comes from dopamine antagonists or the abrupt loss of dopaminergic drugs. Reversing the pairing, so that antipsychotic tablets are blamed for the hyperreflexic picture and antidepressant combinations for the rigid one, is the classic error. Benzodiazepine sedatives and hypnotics cause sedation rather than either hypermetabolic state, and are in fact part of the treatment. Anticholinergic prescriptions give a dry, flushed delirium and lithium supplements give tremor and ataxia, so that pairing fits neither syndrome.
- A patient develops fever, rigidity, and altered mental status over the course of roughly a week after starting an antipsychotic, with markedly elevated creatine kinase. The emergency nurse identifies which feature of the time course as most consistent with neuroleptic malignant syndrome rather than serotonin syndrome?
- Explosive onset over minutes after a single capsule
- Transient onset over hours after a partial exposure
- Gradual onset over days after a dopamine antagonist
- Late onset over weeks after a stopped antipsychotic
Correct answer: Gradual onset over days after a dopamine antagonist
Gradual onset over days after a dopamine antagonist is the time course of neuroleptic malignant syndrome, which builds over one to three days and may take a week to declare itself with fever, rigidity and a high creatine kinase. Serotonin syndrome instead appears within hours of a serotonergic dose change, so an explosive onset over minutes after a single capsule points away from this diagnosis. A transient onset over hours after a partial exposure that settles by itself fits neither hypermetabolic syndrome, since both persist and worsen untreated. Late onset over weeks after a stopped antipsychotic describes dopaminergic withdrawal, not the patient who has just begun the drug.
- An emergency nurse performs a suicide risk assessment and recognizes that certain factors most strongly increase near-term risk. Which finding indicates the highest acute risk and warrants immediate one-to-one observation?
- A vague wish, unclear intent, and access to a rejected method
- A quiet manner, guarded speech, and access to a family member
- A distant episode, sad mood, and access to a former counselor
- A specific plan, stated intent, and access to a lethal method
Correct answer: A specific plan, stated intent, and access to a lethal method
A specific plan, stated intent, and access to a lethal method together mark the highest acute risk and call for one-to-one observation and removal of means. A vague wish, unclear intent, and access to a rejected method describe passive ideation, which is concerning but far less imminent. A quiet manner, guarded speech, and access to a family member describe reluctance to talk rather than a readiness to act. A distant episode, sad mood, and access to a former counselor place the danger in the past instead of in the next few hours.
- During a suicide risk assessment a patient discloses recent suicidal thoughts. A colleague worries that asking directly about suicide may plant the idea. Which response by the emergency nurse reflects current evidence?
- Asking directly about suicide leaves risk unchanged and remains central to assessment
- Asking directly about suicide raises risk markedly and appears damaging to assessment
- Asking directly about suicide suits risk professionals and adds nothing to assessment
- Asking directly about suicide awaits risk disclosure and invites delays to assessment
Correct answer: Asking directly about suicide leaves risk unchanged and remains central to assessment
Asking directly about suicide leaves risk unchanged and remains central to assessment; the evidence is consistent that screening does not plant the idea, and the question is what uncovers ideation, plan, intent and access to means. The belief that it raises risk markedly and appears damaging to assessment is exactly the myth this evidence overturns. Claiming the task suits risk professionals and adds nothing to assessment wrongly narrows a core nursing responsibility to a specialist. And an interview that awaits risk disclosure and invites delays to assessment lets a life-threatening plan go undetected while the team waits for the patient to speak first.
- A patient is brought to the emergency department after an intentional tricyclic antidepressant overdose. The cardiac monitor shows a QRS duration of 130 milliseconds and the patient is becoming hypotensive. Which therapy should the emergency nurse anticipate as the priority intervention?
- Intravenous potassium chloride
- Intravenous sodium bicarbonate
- Intravenous flumazenil boluses
- Nasogastric activated charcoal
Correct answer: Intravenous sodium bicarbonate
Intravenous sodium bicarbonate is the priority once the QRS widens past about 100 milliseconds in tricyclic overdose, because alkalinization plus the added sodium load overcomes the sodium-channel blockade and prevents ventricular dysrhythmias and worsening hypotension. Intravenous potassium chloride does nothing for sodium-channel blockade and can further destabilize conduction. Intravenous flumazenil boluses treat benzodiazepines and are hazardous here, since they can precipitate seizures in a mixed ingestion. Nasogastric activated charcoal may bind residual drug when the airway is protected, but it cannot reverse cardiotoxicity that is already present on the monitor.
- A patient who intentionally ingested a large amount of acetaminophen four hours ago has a serum acetaminophen level that plots above the treatment line on the Rumack-Matthew nomogram. Which intervention should the emergency nurse anticipate and why is timing critical?
- Deferoxamine, because it fully chelates the iron deposits when started inside eight hours
- Naloxone, because it fully reverses the opioid depression when started inside eight hours
- Acetylcysteine, because it fully protects the liver cells when started inside eight hours
- Observation, because it fully interprets the early levels when started inside eight hours
Correct answer: Acetylcysteine, because it fully protects the liver cells when started inside eight hours
Acetylcysteine is the antidote, and because it fully protects the liver cells when started inside eight hours of an acute ingestion, a level above the treatment line at four hours is treated at once. Deferoxamine, because it fully chelates the iron deposits, belongs to iron poisoning and does nothing for acetaminophen. Naloxone, because it fully reverses the opioid depression, treats opioid overdose, and acetaminophen is not an opioid. Observation, because it fully interprets the early levels, misreads the nomogram: a four-hour level above the treatment line is the standard trigger to begin therapy, never a reason to wait.
- A patient on long-term lithium for bipolar disorder presents with coarse tremor, ataxia, slurred speech, vomiting, and confusion after a recent dehydrating illness. The emergency nurse recognizes this presentation as most consistent with which problem?
- Response from scheduled dosages, with lithium unchanged
- Gastroenteritis from viral spread, with lithium neutral
- Intoxication from alcohol excess, with lithium innocent
- Toxicity from poor clearance, with lithium accumulation
Correct answer: Toxicity from poor clearance, with lithium accumulation
This is toxicity from poor clearance, with lithium accumulation, because a dehydrating illness cuts renal excretion of a drug with a narrow therapeutic index, and the coarse tremor, ataxia, slurred speech, vomiting and confusion are the classic picture. A response from scheduled dosages, with lithium unchanged, could not produce ataxia and confusion, which are never therapeutic effects. Gastroenteritis from viral spread, with lithium neutral, accounts for the vomiting alone and would miss a level that may require dialysis. Intoxication from alcohol excess, with lithium innocent, is an anchoring error that overlooks the drug this patient actually takes.
- A patient presents in a manic episode of bipolar disorder. Which cluster of findings should the emergency nurse expect?
- Reduced sleep, pressured speech, grandiosity, and impulsive risks
- Excessive sleep, slowed speech, withdrawal, and pervasive sadness
- Fragmented sleep, absent speech, immobility, and flattened affect
- Preserved sleep, clear speech, hallucinations, and unchanged mood
Correct answer: Reduced sleep, pressured speech, grandiosity, and impulsive risks
A manic episode presents with reduced sleep, pressured speech, grandiosity, and impulsive risks, usually alongside an elevated or irritable mood and inflated confidence. Excessive sleep, slowed speech, withdrawal, and pervasive sadness describe a depressive episode instead. Fragmented sleep, absent speech, immobility, and flattened affect suggest catatonia or the negative symptoms of a psychotic illness. Preserved sleep, clear speech, hallucinations, and unchanged mood point to a primary psychotic or drug-induced process rather than to mania.
- A patient who intentionally overdosed on aspirin presents with tinnitus, hyperventilation, nausea, and diaphoresis, and an arterial blood gas shows a mixed respiratory alkalosis and metabolic acidosis. The emergency nurse recognizes this toxidrome as consistent with which agent?
- Massive atenolol toxicity
- Acute salicylate toxicity
- Advanced ferrous toxicity
- Delayed diazepam toxicity
Correct answer: Acute salicylate toxicity
Acute salicylate toxicity is the match, since tinnitus, hyperventilation, nausea and diaphoresis with a primary respiratory alkalosis layered on a metabolic acidosis is the classic aspirin pattern. Massive atenolol toxicity, a beta blocker, gives bradycardia, hypotension and hypoglycemia rather than tinnitus and an alkalosis. Advanced ferrous toxicity gives vomiting, gastrointestinal bleeding and a pure anion-gap acidosis with no tinnitus. Delayed diazepam toxicity gives sedation with hypoventilation and a respiratory acidosis, the opposite of the acid-base pattern described here.
- An emergency nurse uses verbal de-escalation as the first-line approach for an agitated but not yet violent patient. Which technique reflects best practice?
- Use a loud voice, close a short distance, debate, and deny unlikely choices
- Use a sharp voice, mass a large crowd, lecture, and repeat familiar choices
- Use a calm voice, keep a safe distance, listen, and offer realistic choices
- Use a stern voice, name a strict rule, threaten, and limit possible choices
Correct answer: Use a calm voice, keep a safe distance, listen, and offer realistic choices
Best practice is to use a calm voice, keep a safe distance, listen, and offer realistic choices, which hands a measure of control back to the patient. To use a loud voice, close a short distance, debate, and deny unlikely choices invades personal space, and arguing with a fixed belief only hardens it. To use a sharp voice, mass a large crowd, lecture, and repeat familiar choices reads as a show of force and commonly precipitates the violence it was meant to prevent. To use a stern voice, name a strict rule, threaten, and limit possible choices turns restraint into a threat rather than a last resort, raising agitation instead of lowering it.
- A patient brought in after taking GHB (gamma-hydroxybutyrate) at a party is deeply sedated with periods of apnea but then becomes suddenly awake and agitated, cycling between the two states. Which aspect of care does the emergency nurse prioritize?
- Additional airway and respiratory monitoring with antidote care, because flumazenil helps with agitation
- Intensive airway and respiratory monitoring with ambulatory care, because walking competes with sedation
- Aggressive airway and respiratory monitoring with sedative care, because agitation succumbs to restraint
- Close airway and respiratory monitoring with supportive care, because sedation alternates with agitation
Correct answer: Close airway and respiratory monitoring with supportive care, because sedation alternates with agitation
GHB intoxication calls for close airway and respiratory monitoring with supportive care, because sedation alternates with agitation and the patient swings from apnea to combative arousal within minutes. Additional airway and respiratory monitoring with antidote care rests on a false premise, because flumazenil helps with agitation only from benzodiazepines and does nothing at the GHB receptor. Intensive airway and respiratory monitoring with ambulatory care fails, because walking competes with sedation without protecting anything, and an apneic patient cannot be walked. Aggressive airway and respiratory monitoring with sedative care is unsafe, because the belief that agitation succumbs to restraint and more drug ignores the respiratory depression already present.
- A patient found unresponsive with pinpoint pupils and a respiratory rate of six breaths per minute is suspected of an opioid overdose after an intentional ingestion. After supporting ventilation, which medication should the emergency nurse anticipate, and what is the key nursing consideration?
- Naloxone, titrated to restore breathing, with vigilance for resedation as it wears off
- Flumazenil, delivered to reverse sedation, with vigilance for seizures as it wears off
- Glucagon, prescribed to support perfusion, with vigilance for vomiting as it wears off
- Charcoal, introduced to absorb residues, with vigilance for aspiration as it wears off
Correct answer: Naloxone, titrated to restore breathing, with vigilance for resedation as it wears off
Naloxone, titrated to restore breathing, with vigilance for resedation as it wears off, is the anticipated therapy: the endpoint is ventilation rather than full arousal, and naloxone's duration is often shorter than the opioid's. Flumazenil, delivered to reverse sedation, with vigilance for seizures as it wears off, treats benzodiazepines and would not explain or correct pinpoint pupils from an opioid. Glucagon, prescribed to support perfusion, with vigilance for vomiting as it wears off, is the beta-blocker antidote and has no opioid activity. Charcoal, introduced to absorb residues, with vigilance for aspiration as it wears off, is unsafe in an unprotected airway and does nothing for drug already absorbed.
- A patient with chronic alcohol use is being assessed for withdrawal severity using the CIWA-Ar scale so symptom-triggered benzodiazepine dosing can be guided. What is the primary value of using this validated scale in the emergency department?
- It precisely pinpoints withdrawal severity to reveal symptom-triggered history
- It objectively grades withdrawal severity to guide symptom-triggered treatment
- It routinely labels withdrawal severity to explain symptom-triggered confusion
- It entirely covers withdrawal severity to replace symptom-triggered assessment
Correct answer: It objectively grades withdrawal severity to guide symptom-triggered treatment
The value of the validated scale is that it objectively grades withdrawal severity to guide symptom-triggered treatment, so benzodiazepine doses follow measured symptoms and the response is tracked over time. The claim that it precisely pinpoints withdrawal severity to reveal symptom-triggered history fails, because no score can date the last drink. The claim that it routinely labels withdrawal severity to explain symptom-triggered confusion fails too, since the tool measures severity and never identifies a cause such as infection or head injury. The claim that it entirely covers withdrawal severity to replace symptom-triggered assessment is plainly false: the scale supplements nursing judgment rather than substituting for it.
- A patient who intentionally overdosed on a benzodiazepine is sedated but maintaining a patent airway and adequate oxygenation. A new nurse asks why flumazenil is not routinely given. Which explanation by the emergency nurse is correct?
- Flumazenil reverses sedation and tolerance in regular users, so it is given permanently
- Flumazenil neutralizes overdose and toxicity in untreated users, so it is given quickly
- Flumazenil provokes seizures and withdrawal in chronic users, so it is given cautiously
- Flumazenil duplicates naloxone and naltrexone in narcotic users, so it is given swiftly
Correct answer: Flumazenil provokes seizures and withdrawal in chronic users, so it is given cautiously
Flumazenil provokes seizures and withdrawal in chronic users, so it is given cautiously if at all, and a patient who is sedated with a patent airway and good oxygenation is watched rather than reversed. The claim that flumazenil reverses sedation and tolerance in regular users, so it is given permanently, is untrue, since the drug is short-acting and cures nothing. The claim that flumazenil neutralizes overdose and toxicity in untreated users, so it is given quickly, inverts the guidance, which warns against routine reversal, above all with a co-ingested tricyclic. The claim that flumazenil duplicates naloxone and naltrexone in narcotic users, so it is given swiftly, confuses two receptor systems, because flumazenil acts at the benzodiazepine site and has no opioid activity.
- A patient is brought in agitated and hallucinating after ingesting a plant containing an anticholinergic substance. The emergency nurse expects which classic toxidrome?
- Cold pale skin, damp membranes, pinpoint pupils, urinary frequency, and lethargy
- Damp gray skin, wet membranes, constricted pupils, urinary urgency, and diarrhea
- Cool moist skin, pink membranes, midsize pupils, urinary output, and bradycardia
- Hot flushed skin, dry membranes, dilated pupils, urinary retention, and delirium
Correct answer: Hot flushed skin, dry membranes, dilated pupils, urinary retention, and delirium
The anticholinergic toxidrome is hot flushed skin, dry membranes, dilated pupils, urinary retention, and delirium, captured by the saying mad as a hatter, dry as a bone, red as a beet. Cold pale skin, damp membranes, pinpoint pupils, urinary frequency, and lethargy describe opioid intoxication instead. Damp gray skin, wet membranes, constricted pupils, urinary urgency, and diarrhea are the cholinergic picture and the exact opposite of this presentation. Cool moist skin, pink membranes, midsize pupils, urinary output, and bradycardia fit a beta-blocker or calcium-channel blocker overdose rather than a plant alkaloid.
- A patient exposed to an organophosphate pesticide in a suicide attempt presents with excessive salivation, lacrimation, urination, diarrhea, vomiting, bronchorrhea, and miosis. Which antidote should the emergency nurse anticipate alongside aggressive airway management?
- Repeated atropine boluses
- Timed naloxone injections
- Cautious flumazenil drips
- Urgent deferoxamine doses
Correct answer: Repeated atropine boluses
Repeated atropine boluses are the antidote for organophosphate poisoning, titrated upward until the bronchorrhea and salivation dry, and given alongside pralidoxime and aggressive airway support. Timed naloxone injections reverse opioids, which cause miosis but never the wet secretions, diarrhea and lacrimation seen here. Cautious flumazenil drips reverse benzodiazepines and would do nothing for a cholinergic crisis. Urgent deferoxamine doses chelate iron and have no effect on inhibited acetylcholinesterase.
- An emergency nurse caring for a patient in four-point restraints reviews the required monitoring. Which practice reflects safe restraint care?
- Record circulation, airway, skin, and restraint need nightly, with scattered reassessment
- Assess circulation, airway, skin, and restraint need frequently, with prompt reassessment
- Document circulation, airway, skin, and restraint need twice, with discharge reassessment
- Tighten circulation, airway, skin, and restraint need steadily, with tighter reassessment
Correct answer: Assess circulation, airway, skin, and restraint need frequently, with prompt reassessment
Safe restraint care is to assess circulation, airway, skin, and restraint need frequently, with prompt reassessment, so the device comes off the moment it is no longer justified. To record circulation, airway, skin, and restraint need nightly, with scattered reassessment leaves hours in which a limb can lose perfusion unseen. To document circulation, airway, skin, and restraint need twice, with discharge reassessment treats the restraint as permanent and ignores the duty to renew the order. To tighten circulation, airway, skin, and restraint need steadily, with tighter reassessment causes neurovascular injury and, at worst, asphyxial death.
- A patient with schizophrenia in the emergency department reports hearing voices commanding self-harm and sees figures that are not present. The emergency nurse identifies these as which category of schizophrenia symptoms?
- Negative symptoms of diminished drive
- Cognitive symptoms of impaired memory
- Positive symptoms of added experience
- Reactive symptoms of transient stress
Correct answer: Positive symptoms of added experience
Hallucinations and delusions are positive symptoms of added experience, phenomena layered on top of ordinary function, and command hallucinations to self-harm demand immediate safety measures. Negative symptoms of diminished drive are losses of function such as flat affect, avolition and poverty of speech. Cognitive symptoms of impaired memory concern attention and working memory rather than perception. Reactive symptoms of transient stress would not include hearing commanding voices and seeing figures that nobody else can see.
- An emergency nurse must differentiate delirium from dementia in a confused older adult. Which feature most strongly points to delirium rather than dementia?
- Gradual onset of declining memory and orientation, usually with a hereditary pattern
- Stable onset of unchanging alertness and cognition, usually with a routine screening
- Insidious onset of worsening language and vocabulary, usually with a preserved focus
- Acute onset of fluctuating attention and consciousness, usually with a medical cause
Correct answer: Acute onset of fluctuating attention and consciousness, usually with a medical cause
Acute onset of fluctuating attention and consciousness, usually with a medical cause such as infection, hypoxia or a new drug, is what marks delirium and makes it a reversible emergency. Gradual onset of declining memory and orientation, usually with a hereditary pattern, describes dementia developing over months to years. Stable onset of unchanging alertness and cognition, usually with a routine screening, argues against delirium altogether, since fluctuation is its defining feature. Insidious onset of worsening language and vocabulary, usually with a preserved focus, fits a progressive aphasia in which attention stays intact.
- A patient who intentionally overdosed on a sulfonylurea oral diabetes medication is found with a blood glucose of 38 milligrams per deciliter and altered mental status. After giving dextrose, which additional therapy should the emergency nurse anticipate for refractory or recurrent hypoglycemia from this agent?
- Octreotide infusion
- Glucagon injections
- Bicarbonate boluses
- Naloxone titrations
Correct answer: Octreotide infusion
An octreotide infusion is anticipated after sulfonylurea overdose, because it suppresses the pancreatic insulin release that drives repeated hypoglycemia even once dextrose has been given. Glucagon injections raise glucose only briefly, depend on glycogen stores that are already exhausted, and themselves stimulate insulin secretion, so the rebound returns. Bicarbonate boluses treat sodium-channel blockade and severe acidosis, not hyperinsulinemia. Naloxone titrations reverse opioids and have no bearing on serum glucose.
- A patient brought in for a suspected intentional overdose is calm and cooperative but the toxin and amount are unknown. Beyond antidotes, which nursing priority applies to virtually every poisoned patient in the emergency department?
- Invasive care with airway, breathing, circulation, and scheduled suction while decontaminating the stomach
- Supportive care with airway, breathing, circulation, and continuous monitoring while identifying the agent
- Postponed care with airway, breathing, circulation, and delayed intervention while awaiting the toxicology
- Hydrating care with airway, breathing, circulation, and enforced swallowing while neutralizing the poisons
Correct answer: Supportive care with airway, breathing, circulation, and continuous monitoring while identifying the agent
Supportive care with airway, breathing, circulation, and continuous monitoring while identifying the agent is the universal priority, because most poisoned patients are managed supportively and only a minority have a specific antidote. Invasive care with airway, breathing, circulation, and scheduled suction while decontaminating the stomach is not routine, since lavage is reserved for rare, very recent, life-threatening ingestions. Postponed care with airway, breathing, circulation, and delayed intervention while awaiting the toxicology result squanders the window in which deterioration is caught. Hydrating care with airway, breathing, circulation, and enforced swallowing while neutralizing the poisons risks aspiration and has no evidence behind it.
- A patient presents with a major depressive episode. Which combination of findings is most characteristic and should heighten the emergency nurse's concern for suicide risk screening?
- Elevated high mood, grandiosity, restlessness, reckless sprees, and fearlessness
- Reddened dry skin, mydriasis, tachycardia, urinary retention, and disorientation
- Persistent low mood, anhedonia, worthlessness, appetite change, and hopelessness
- Episodic limb clonus, hyperreflexia, diaphoresis, muscle rigidity, and agitation
Correct answer: Persistent low mood, anhedonia, worthlessness, appetite change, and hopelessness
A major depressive episode is marked by persistent low mood, anhedonia, worthlessness, appetite change, and hopelessness, and hopelessness above all is what drives the nurse to screen for suicide risk. Elevated high mood, grandiosity, restlessness, reckless sprees, and fearlessness describe a manic episode rather than depression. Reddened dry skin, mydriasis, tachycardia, urinary retention, and disorientation form an anticholinergic toxidrome. Episodic limb clonus, hyperreflexia, diaphoresis, muscle rigidity, and agitation point to serotonin syndrome, not to a mood disorder.
- A patient with severe agitation requires intramuscular antipsychotic sedation, and the emergency nurse anticipates pairing it with a benzodiazepine. What is the primary rationale for combining these agents in acute agitation?
- To force longer sleeping while permitting bigger doses and heavier effects
- To offset failing sedation while permitting solo doses and gentler effects
- To remove bedside watching while permitting routine doses and safe effects
- To reach quicker calming while permitting smaller doses and milder effects
Correct answer: To reach quicker calming while permitting smaller doses and milder effects
An antipsychotic is paired with a benzodiazepine to reach quicker calming while permitting smaller doses and milder effects from each drug. It is not done to force longer sleeping while permitting bigger doses and heavier effects, since the goal is a calm, rousable patient rather than prolonged unconsciousness. Nor is it to offset failing sedation while permitting solo doses and gentler effects, because antipsychotics frequently work well by themselves. And it is certainly not to remove bedside watching while permitting routine doses and safe effects, because the combination still demands close cardiac and respiratory monitoring.
- An adolescent is brought to the emergency department after a friend reported the teen gave away prized possessions, posted goodbye messages, and has been increasingly withdrawn. Which action should the emergency nurse take first?
- Begin close observation and a structured suicide screen before removing the means
- Begin quick reassurance and a calm parental update before arranging the discharge
- Begin tight restraint and a strong sedative injection before assessing the danger
- Begin silent waiting and a passive overnight vigil before inviting the disclosure
Correct answer: Begin close observation and a structured suicide screen before removing the means
Giving away prized possessions, posting goodbye messages and deepening withdrawal are recognized warning signs, so the first action is to begin close observation and a structured suicide screen before removing the means from the environment. To begin quick reassurance and a calm parental update before arranging the discharge dismisses those signs as ordinary adolescence and sends a high-risk teen home. To begin tight restraint and a strong sedative injection before assessing the danger is coercive and unjustified in a cooperative patient. To begin silent waiting and a passive overnight vigil before inviting the disclosure leaves the assessment to chance and delays the removal of lethal means.
- An adult arrives with hives, wheezing, lip swelling, and a blood pressure of 82/50 mmHg minutes after eating shrimp. The emergency nurse should anticipate giving epinephrine 1 mg/mL concentration by which route and approximate dose for first-line treatment of anaphylaxis?
- 0.1 to 0.2 mg intravenously into the forearm veins
- 0.3 to 0.5 mg intramuscularly into the outer thigh
- 0.05 to 0.1 mg subcutaneously into the lateral arm
- 0.8 to 1.0 mg intramuscularly into the mid deltoid
Correct answer: 0.3 to 0.5 mg intramuscularly into the outer thigh
First-line treatment of anaphylaxis is 0.3 to 0.5 mg of epinephrine given intramuscularly into the outer thigh, the anterolateral vastus lateralis, repeatable every 5 to 10 minutes, because that site gives the fastest and most reliable absorption. Pushing it intravenously into the forearm veins at full 1 mg/mL strength risks dangerous dysrhythmias; the IV route is reserved for refractory shock as a dilute, titrated infusion. Giving 0.05 to 0.1 mg subcutaneously into the lateral arm underdoses an adult and absorbs far too slowly for a patient who is already hypotensive. And 0.8 to 1.0 mg intramuscularly into the mid deltoid overdoses an adult and uses a site with slower uptake than the thigh.
- A patient with new-onset polyuria and confusion has a glucose of 720 mg/dL, pH 7.10, bicarbonate 12 mmol/L, and large serum ketones. A second patient has a glucose of 940 mg/dL, pH 7.34, bicarbonate 20 mmol/L, calculated effective osmolality of 335 mOsm/kg, and minimal ketones. How are these two hyperglycemic crises best distinguished?
- The first is hyperglycemic nonketotic stupor and the second is ketoacidotic emergency
- The first is advanced ketoacidosis and the second is early hyperglycemic ketoacidosis
- The first is diabetic ketoacidosis and the second is hyperglycemic hyperosmolar state
- The first is prolonged hyperosmolar collapse and the second is hyperglycemic collapse
Correct answer: The first is diabetic ketoacidosis and the second is hyperglycemic hyperosmolar state
The first is diabetic ketoacidosis and the second is hyperglycemic hyperosmolar state. Acidosis with a pH under 7.3, a bicarbonate under 18 and large ketones defines ketoacidosis, while a glucose of 600 or more with an effective osmolality over 300 and a pH of 7.3 or higher with minimal ketones defines the hyperosmolar picture. Calling the first a hyperglycemic nonketotic stupor and the second a ketoacidotic emergency simply reverses the two patients. Calling the first advanced ketoacidosis and the second early hyperglycemic ketoacidosis ignores the near-normal pH and trivial ketones in the second patient. Calling the first a prolonged hyperosmolar collapse and the second a hyperglycemic collapse ignores the acidosis and ketosis that define the first.
- A patient in diabetic ketoacidosis has a glucose of 540 mg/dL, pH 7.08, and potassium of 3.2 mmol/L. The emergency nurse should recognize that the most appropriate next step before starting an insulin infusion is to:
- Ignore the potassium reading and start the insulin
- Buffer the potassium shift and add the bicarbonate
- Dilute the potassium results and hang the dextrose
- Replace the potassium deficit and repeat the level
Correct answer: Replace the potassium deficit and repeat the level
The next step is to replace the potassium deficit and repeat the level, because insulin drives potassium into cells and beginning it at 3.2 mmol/L can precipitate life-threatening hypokalemia and arrhythmia; consensus guidance holds insulin until the potassium is above 3.5 mmol/L. To ignore the potassium reading and start the insulin is exactly the error that threshold exists to prevent. To buffer the potassium shift and add the bicarbonate is not indicated at this pH and would drive the serum potassium lower still. To dilute the potassium results and hang the dextrose belongs later, once the glucose falls toward 200 to 250 mg/dL.
- An emergency nurse is managing an adult with new diabetic ketoacidosis and no history of heart or kidney failure. Which initial fluid order best reflects current resuscitation practice?
- Infuse hypotonic saline at a sizable two-liter bolus
- Infuse isotonic crystalloid at a steady hourly liter
- Infuse dextrose solution at a hundred-mL hourly rate
- Infuse buffered bicarbonate at a preset upfront dose
Correct answer: Infuse isotonic crystalloid at a steady hourly liter
The order that matches practice is to infuse isotonic crystalloid at a steady hourly liter, roughly 500 to 1000 mL of 0.9 percent saline or a balanced solution each hour for the first few hours, because these patients are profoundly volume depleted. To infuse hypotonic saline at a sizable two-liter bolus drops osmolality too quickly and courts cerebral edema. To infuse dextrose solution at a hundred-mL hourly rate delivers almost no volume and pushes the glucose up. To infuse buffered bicarbonate at a preset upfront dose treats neither the deficit nor the ketosis and is not indicated at this level of acidosis.
- A patient with type 1 diabetes is treated for ketoacidosis. The emergency nurse knows the DKA is considered resolved when which set of values is achieved?
- Glucose under 80 with a venous pH around 7.1 and ketones detectable
- Potassium above 5.5 with a venous pH near 7.2 and ketones increased
- Venous pH above 7.3 with a bicarbonate above 18 and ketones cleared
- Pulse under 60 with a venous pH around 7.0 and ketones undiminished
Correct answer: Venous pH above 7.3 with a bicarbonate above 18 and ketones cleared
Ketoacidosis is resolved at a venous pH above 7.3 with a bicarbonate above 18 and ketones cleared, meaning beta-hydroxybutyrate under 0.6 mmol/L. The acidosis and the ketones define the crisis, not the sugar, so insulin continues after the glucose falls. Glucose under 80 with a venous pH around 7.1 and ketones detectable is active ketoacidosis with iatrogenic hypoglycemia. Potassium above 5.5 with a venous pH near 7.2 and ketones increased describes a deteriorating patient. A pulse under 60 with a venous pH around 7.0 and ketones undiminished shows the acidosis is untouched.
- A dialysis patient who missed treatment has a potassium of 7.1 mmol/L with peaked T waves and a widening QRS on the monitor. The emergency nurse should anticipate giving which medication first?
- IV insulin given to reverse the hyperkalemia
- IV bicarbonate given to counter the acidosis
- IV furosemide given to boost the elimination
- IV calcium given to stabilize the myocardium
Correct answer: IV calcium given to stabilize the myocardium
With the QRS already widening, the first drug is IV calcium given to stabilize the myocardium; it raises the threshold of the cardiac membrane within minutes and guards against a lethal rhythm even though it removes no potassium. IV insulin given to reverse the hyperkalemia shifts potassium intracellularly but takes 15 to 60 minutes, too slow to be first. IV bicarbonate given to counter the acidosis shifts very little in a dialysis patient who is not acidemic. IV furosemide given to boost the elimination of potassium cannot work in a patient with no renal function.
- As serum potassium rises, the emergency nurse expects the ECG to change in a characteristic sequence. Which progression reflects worsening hyperkalemia?
- Tented T wave, then a broad QRS, then a sine waveform
- Short PR, then a delta wave, then a swift steady beat
- Prolonged QT, then a tall U wave, then a torsades run
- Elevated ST, then a deeper Q wave, then a flattened T
Correct answer: Tented T wave, then a broad QRS, then a sine waveform
Rising potassium produces a tented T wave, then a broad QRS, then a sine waveform immediately before asystole or ventricular fibrillation, and recognizing that order tells the nurse when to escalate. A short PR, then a delta wave, then a swift steady beat is pre-excitation and has nothing to do with potassium. A prolonged QT, then a tall U wave, then a torsades run is the hypokalemic sequence. An elevated ST, then a deeper Q wave, then a flattened T follows the evolution of an infarct.
- An older adult on a thiazide diuretic presents weak with a potassium of 2.6 mmol/L. Which ECG finding is most consistent with this electrolyte disturbance?
- Tall tented T waves with a compressed downslope
- Flattened T waves with a prominent U deflection
- Wide sine-shaped waves with a small P component
- Rounded elevated waves with a deep Q depression
Correct answer: Flattened T waves with a prominent U deflection
A potassium of 2.6 gives flattened T waves with a prominent U deflection, alongside ST depression and a lengthened QT that predisposes to ventricular dysrhythmia; replacing potassium and checking magnesium is the priority. Tall tented T waves with a compressed downslope are the earliest hyperkalemic change, the opposite disturbance. Wide sine-shaped waves with a small P component mark near-terminal hyperkalemia. Rounded elevated waves with a deep Q depression describe infarction, not an electrolyte problem.
- A patient with chronic alcohol use has refractory hypokalemia that will not correct despite repeated potassium replacement. The emergency nurse should suspect a deficiency of which electrolyte is preventing correction?
- Body phosphorus
- Ionized calcium
- Total magnesium
- Plasma chloride
Correct answer: Total magnesium
Refractory hypokalemia in chronic alcohol use is usually driven by a low total magnesium, because magnesium depletion increases renal potassium wasting and the potassium will not stay up until magnesium is repleted. Body phosphorus falls during refeeding but does not hold the potassium down. Ionized calcium disturbances alter cardiac conduction and neuromuscular irritability rather than potassium handling. Plasma chloride moves with acid-base shifts and does not perpetuate the loss.
- A patient with small-cell lung cancer presents confused with a calcium of 14.2 mg/dL. After the emergency nurse establishes IV access, which intervention is the cornerstone of initial management of severe hypercalcemia?
- Repeated IV calcium gluconate as the mainstay
- Prompt IV pamidronate therapy as the mainstay
- Urgent IV furosemide diuresis as the mainstay
- Aggressive IV isotonic saline as the mainstay
Correct answer: Aggressive IV isotonic saline as the mainstay
Severe hypercalcemia is treated with aggressive IV isotonic saline as the mainstay, which refills the intravascular space and drives urinary calcium excretion; calcitonin and a bisphosphonate are added for sustained control. Repeated IV calcium gluconate as the mainstay would drive the level of 14.2 higher still. Prompt IV pamidronate therapy as the mainstay takes two to four days to lower calcium and cannot carry the acute phase alone. Urgent IV furosemide diuresis as the mainstay, given before the volume is restored, deepens the dehydration that is raising the calcium.
- During a massive blood transfusion, a patient develops perioral tingling, muscle twitching, and a prolonged QT interval. The emergency nurse should suspect which electrolyte abnormality from the citrate in stored blood?
- Depressed ionized calcium
- Depleted plasma magnesium
- Increased donor potassium
- Lowered plasma phosphorus
Correct answer: Depressed ionized calcium
Citrate in banked blood chelates calcium, so perioral tingling, twitching and a lengthened QT during massive transfusion point to depressed ionized calcium, and IV calcium replacement is anticipated. Depleted plasma magnesium is also chelated by citrate but does not by itself produce this tetany-plus-QT picture. Increased donor potassium does occur with older units, yet it announces itself with peaked T waves rather than neuromuscular irritability. Lowered plasma phosphorus is not a recognized citrate effect at all.
- A long-distance runner collapses with a serum sodium of 121 mmol/L after drinking large volumes of plain water. The emergency nurse should recognize the greatest immediate risk from this acute hyponatremia is:
- Pulmonary edema with unrelenting hypoxemia
- Cerebral edema with unheralded convulsions
- Peripheral edema with dependent discomfort
- Hyperkalemic arrest with terminal asystole
Correct answer: Cerebral edema with unheralded convulsions
When sodium falls quickly, water moves into brain cells, so the greatest immediate danger is cerebral edema with unheralded convulsions, and a symptomatic runner may need hypertonic 3 percent saline. Pulmonary edema with unrelenting hypoxemia is described in exercise-associated hyponatremia but is neither the usual nor the leading cause of death. Peripheral edema with dependent discomfort carries no threat to life. Hyperkalemic arrest with terminal asystole belongs to potassium disorders, and this sodium of 121 does not raise potassium.
- A patient with chronic hyponatremia is being corrected. The emergency nurse knows that raising the serum sodium too rapidly risks which serious complication?
- Irreversible tubular necrosis
- Prolonged cerebral herniation
- Osmotic demyelination lesions
- Widespread muscular breakdown
Correct answer: Osmotic demyelination lesions
Correcting a chronic sodium too quickly causes osmotic demyelination lesions in the pons, with delayed dysarthria, paralysis and falling consciousness, which is why the rise is capped near 8 mmol/L in 24 hours. Irreversible tubular necrosis follows ischemia or nephrotoxins and is unrelated to the rate of sodium correction. Prolonged cerebral herniation is the danger of leaving the sodium low, not of raising it. Widespread muscular breakdown is a consequence of the low sodium and of any seizures, not of overly rapid correction.
- A patient with known Addison disease presents after several days of vomiting with hypotension unresponsive to fluids, hyponatremia, and hyperkalemia. The emergency nurse should anticipate administering which drug as the priority treatment for adrenal (addisonian) crisis?
- IV norepinephrine at a pressor infusion
- IV levothyroxine at a replacement trial
- IV insulin at a potassium-shift regimen
- IV hydrocortisone at a stress-dose drip
Correct answer: IV hydrocortisone at a stress-dose drip
Adrenal crisis is glucocorticoid and mineralocorticoid failure, so IV hydrocortisone at a stress-dose drip is given at once, without waiting for confirmatory testing, alongside isotonic saline and dextrose. IV norepinephrine at a pressor infusion cannot lift a pressure that stays refractory until the missing steroid is replaced. IV levothyroxine at a replacement trial addresses the wrong endocrine axis entirely. IV insulin at a potassium-shift regimen would deepen the hypoglycemia that accompanies the crisis and is not needed for a potassium that corrects with steroid and saline.
- A patient presents with fever, agitation, atrial fibrillation with a rate of 165, and a temperature of 41 degrees Celsius after stopping antithyroid medication. The emergency nurse should recognize this thyroid storm and anticipate that a beta-blocker is given primarily to:
- Suppress the rapid pulse and adrenergic outflow
- Prevent the fresh hormone synthesis and release
- Reduce the elevated serum calcium and phosphate
- Destroy the active thyroid tissue and follicles
Correct answer: Suppress the rapid pulse and adrenergic outflow
In thyroid storm a beta-blocker such as propranolol is given to suppress the rapid pulse and adrenergic outflow, which is what threatens the patient at a rate of 165. It does not prevent the fresh hormone synthesis and release; thionamides block synthesis and iodine blocks release. It does not reduce the elevated serum calcium and phosphate, which are not the problem here. It does not destroy the active thyroid tissue and follicles, which is the role of radioiodine or thyroidectomy later.
- An elderly patient is brought in hypothermic, bradycardic, hypotensive, and obtunded with non-pitting edema and a history of untreated hypothyroidism. The emergency nurse should recognize myxedema coma and anticipate which priority treatment?
- Sustained IV propranolol plus IV phenylephrine
- Prompt IV levothyroxine plus IV hydrocortisone
- Immediate IV furosemide plus IV spironolactone
- Empiric IV hydrocortisone plus IV azithromycin
Correct answer: Prompt IV levothyroxine plus IV hydrocortisone
Myxedema coma calls for prompt IV levothyroxine plus IV hydrocortisone, the steroid covering the adrenal insufficiency that frequently coexists, with supportive warming and ventilation. Sustained IV propranolol plus IV phenylephrine would drive an already bradycardic, hypotensive patient further down. Immediate IV furosemide plus IV spironolactone strips volume from a patient whose non-pitting edema is mucopolysaccharide, not fluid overload. Empiric IV hydrocortisone plus IV azithromycin covers a possible infection but leaves the hormone deficit that is causing the coma untreated.
- A patient on insulin is found diaphoretic, tremulous, and confused with a point-of-care glucose of 38 mg/dL but is able to follow commands and swallow. The emergency nurse should:
- Withhold the source of sugar and recheck in 30 minutes
- Administer a dose of insulin and recheck in 45 minutes
- Offer fifteen grams of sugar and recheck in 15 minutes
- Inject a syringe of glucagon and recheck in 60 minutes
Correct answer: Offer fifteen grams of sugar and recheck in 15 minutes
This patient follows commands and can swallow, so the rule of 15 applies: offer fifteen grams of sugar (15 to 20 grams of any fast-acting carbohydrate) and recheck in 15 minutes, repeating until the glucose climbs. Withhold the source of sugar and recheck in 30 minutes leaves a glucose of 38 untreated and invites seizure and coma. Administer a dose of insulin and recheck in 45 minutes would push the glucose lower still. Inject a syringe of glucagon and recheck in 60 minutes is the fallback for the patient who cannot swallow or has no IV access, and it acts more slowly than oral carbohydrate here.
- A 22-year-old with known sickle cell disease presents with severe diffuse bone pain, a normal temperature, and oxygen saturation of 96 percent. The emergency nurse should recognize this vaso-occlusive crisis and prioritize which interventions?
- Empiric anticoagulation, IV heparin, and restricted oxygen
- Withheld analgesics, IV diuretics, and intermittent oxygen
- Routine transfusions, IV chelation, and pressurized oxygen
- Immediate analgesia, IV hydration, and supplemental oxygen
Correct answer: Immediate analgesia, IV hydration, and supplemental oxygen
An uncomplicated vaso-occlusive crisis is managed with immediate analgesia, IV hydration, and supplemental oxygen when the saturation falls, along with treatment of any precipitant. Empiric anticoagulation, IV heparin, and restricted oxygen is not indicated for a pain crisis and adds bleeding risk. Withheld analgesics, IV diuretics, and intermittent oxygen delays pain relief out of a misplaced fear of dependence and dehydrates a patient who needs volume. Routine transfusions, IV chelation, and pressurized oxygen belong to acute chest syndrome or stroke, not to every painful episode.
- A septic patient develops oozing from IV sites, prolonged PT and PTT, a low platelet count, a low fibrinogen, and elevated D-dimer. The emergency nurse should recognize this hematologic emergency as:
- Florid disseminated intravascular coagulation
- Recurrent autoimmune thrombocytopenic purpura
- Fulminant thrombotic thrombocytopenic purpura
- Acquired heparin-induced platelet destruction
Correct answer: Florid disseminated intravascular coagulation
Oozing with prolonged clotting times, a low platelet count, a low fibrinogen and a high D-dimer is florid disseminated intravascular coagulation, in which clotting and fibrinolysis run at once and consume factors; treatment targets the sepsis with supportive products. Recurrent autoimmune thrombocytopenic purpura drops platelets alone and leaves fibrinogen and clotting times normal. Fulminant thrombotic thrombocytopenic purpura causes microangiopathic hemolysis with a preserved fibrinogen. Acquired heparin-induced platelet destruction produces thrombosis, not a consumptive bleed, and does not lower fibrinogen.
- A patient receiving a unit of packed red blood cells develops fever, flank pain, dark urine, and hypotension 10 minutes into the transfusion. The emergency nurse should first:
- Slow the transfusion and give an antipyretic now
- Stop the transfusion and start a saline infusion
- Restart the transfusion and add a diuretic bolus
- Continue the transfusion and give a plasma bolus
Correct answer: Stop the transfusion and start a saline infusion
Fever, flank pain, dark urine and hypotension ten minutes into a unit signal acute hemolysis, so the nurse must stop the transfusion and start a saline infusion through fresh tubing, then notify the provider and blood bank. Slow the transfusion and give an antipyretic now misreads this as a febrile non-hemolytic reaction and keeps incompatible cells flowing. Restart the transfusion and add a diuretic bolus repeats the very exposure that is destroying red cells. Continue the transfusion and give a plasma bolus does the same while treating only the blood pressure.
- A hemophilia A patient presents with a tense, painful, swollen knee after minor trauma. The emergency nurse should anticipate which priority treatment to control the bleeding?
- DDAVP given as the standalone hemostatic step
- FFP given as the designated volume substitute
- Factor VIII given as the specific replacement
- PCC given as the emergency reversal treatment
Correct answer: Factor VIII given as the specific replacement
Hemophilia A is a deficiency of clotting factor VIII, so a tense hemarthrosis needs factor VIII given as the specific replacement, and early. DDAVP given as the standalone hemostatic step raises endogenous levels only in mild disease and will not cover a large joint bleed. FFP given as the designated volume substitute carries too little factor per unit to reach a hemostatic level. PCC given as the emergency reversal treatment supplies factors II, VII, IX and X, none of which is the missing one here.
- A patient presents with fever, hypotension, and a temperature of 38.9 degrees Celsius one week after starting chemotherapy, with an absolute neutrophil count of 300 cells per microliter. The emergency nurse should recognize febrile neutropenia and prioritize:
- Acetaminophen and discharge within the first hour
- Voriconazole and filgrastim within the first hour
- Ultrasound and consultation within the first hour
- Cultures and antimicrobials within the first hour
Correct answer: Cultures and antimicrobials within the first hour
Febrile neutropenia is an oncologic emergency, and the priority is cultures and antimicrobials within the first hour, because a neutrophil count of 300 leaves no reserve against an overwhelming bacterial source. Acetaminophen and discharge within the first hour sends home a patient who can decompensate in hours. Voriconazole and filgrastim within the first hour treats fungal disease and marrow recovery before covering the likely bacteria. Ultrasound and consultation within the first hour delays antibacterial cover for imaging that will not change the immediate action.
- While screening a patient with a suspected infection, the emergency nurse uses the systemic inflammatory response syndrome (SIRS) criteria. Which set of findings represents two SIRS criteria?
- Temperature of 38.5 and tachycardia of 96
- Respirations of 18 and leukocytes of 9000
- Pressures of 138/84 and oxygenation of 97
- Bicarbonate of 24 and thrombocytes of 250
Correct answer: Temperature of 38.5 and tachycardia of 96
The criteria are temperature over 38 or under 36 degrees Celsius, heart rate over 90, respiratory rate over 20 or PaCO2 under 32, and white count over 12,000 or under 4,000, so a temperature of 38.5 and tachycardia of 96 satisfies two of them. Respirations of 18 and leukocytes of 9000 sit inside the reference band and count for nothing. Pressures of 138/84 and oxygenation of 97 are not screening variables in this tool. Bicarbonate of 24 and thrombocytes of 250 are unremarkable and are likewise not criteria.
- A patient with a urinary tract infection has a blood pressure of 84/48 mmHg and a lactate of 4.5 mmol/L that persists after 30 mL/kg of crystalloid. The emergency nurse should anticipate the next priority in septic shock management is to:
- Repeat another saline bolus and target a mean pressure of 45
- Start a norepinephrine drip and target a mean pressure of 65
- Deliver a dopamine infusion and target a mean pressure of 55
- Delay the broad antibiotics and target a mean pressure of 75
Correct answer: Start a norepinephrine drip and target a mean pressure of 65
Once hypotension persists after adequate volume, the next move is to start a norepinephrine drip and target a mean pressure of 65, which is the first-line vasopressor and the accepted perfusion goal. To repeat another saline bolus and target a mean pressure of 45 badly undertreats the perfusion goal and risks pulmonary edema after 30 mL/kg has already run. To deliver a dopamine infusion and target a mean pressure of 55 chooses an agent displaced for its arrhythmia risk and a goal below the accepted floor. To delay the broad antibiotics and target a mean pressure of 75 withholds the one intervention that alters mortality; antibiotics should already be infusing.
- An emergency nurse is initiating the sepsis hour-1 bundle for a patient with suspected septic shock. Which set of actions reflects that bundle?
- Radiography, consultation before antibiotics, a single dose, and admission for floor observation
- Restriction, epinephrine before antibiotics, a skipped culture, and transfer for early operation
- Lactate, cultures before antibiotics, a rapid crystalloid, and pressors for stubborn hypotension
- Cultures, ultrasound before antibiotics, a slowed crystalloid, and steroids for late hypotension
Correct answer: Lactate, cultures before antibiotics, a rapid crystalloid, and pressors for stubborn hypotension
The hour-1 bundle is lactate, cultures before antibiotics, a rapid crystalloid at 30 mL/kg for hypotension or a lactate of 4 or more, and pressors for stubborn hypotension to hold the mean pressure at 65. Radiography, consultation before antibiotics, a single dose, and admission for floor observation delays antimicrobial cover for imaging and underdoses the patient. Restriction, epinephrine before antibiotics, a skipped culture, and transfer for early operation withholds fluid, reaches for the wrong pressor and loses the culture window. Cultures, ultrasound before antibiotics, a slowed crystalloid, and steroids for late hypotension slows the very resuscitation the bundle demands, and steroids are not a bundle element.
- A patient with abdominal pain is being screened for sepsis using qSOFA at the bedside. Which three findings make up the qSOFA score?
- Temperature over 38, dramatic leukocytosis, and pulses under 90
- Procalcitonin over 4, collected cultures, and diuresis under 30
- Sodium over 145, elevated bilirubin, and thrombocytes under 100
- Respirations over 22, altered mentation, and systolic under 100
Correct answer: Respirations over 22, altered mentation, and systolic under 100
The bedside score is respirations over 22, altered mentation, and systolic under 100 mmHg, with two of the three marking a higher risk of a poor septic outcome. Temperature over 38, dramatic leukocytosis, and pulses under 90 are inflammatory-response findings, not this score. Procalcitonin over 4, collected cultures, and diuresis under 30 belong to biomarker testing and to the resuscitation bundle. Sodium over 145, elevated bilirubin, and thrombocytes under 100 draw on the full organ-failure score, which needs laboratory data the bedside version deliberately avoids.
- A trauma patient has cool clammy skin, a heart rate of 130, a narrow pulse pressure, and a blood pressure of 88/70 mmHg after blood loss. The emergency nurse should recognize this as which type of shock?
- Acute hypovolemic shock
- Overt obstructive shock
- Spinal neurogenic shock
- Grave cardiogenic shock
Correct answer: Acute hypovolemic shock
Cool clammy skin, a rate of 130, a narrowed pulse pressure and hypotension after hemorrhage describe acute hypovolemic shock, in which compensatory vasoconstriction narrows the pulse pressure; treatment is hemorrhage control and blood. Overt obstructive shock from tamponade or tension pneumothorax would give distended neck veins and often unequal breath sounds rather than pure volume loss. Spinal neurogenic shock produces warm, dry skin with bradycardia, the opposite skin picture. Grave cardiogenic shock arises from pump failure with signs of congestion, not from bleeding.
- A patient with a high cervical spinal cord injury is hypotensive with a heart rate of 52 and warm, dry, flushed skin below the level of injury. The emergency nurse should recognize neurogenic shock and anticipate which treatment in addition to fluids?
- Beta-blockers and digoxin for the rapid rhythm
- Vasopressors and atropine for the slowed pulse
- Furosemide and nitrates for the raised preload
- Epinephrine and steroids for the allergy surge
Correct answer: Vasopressors and atropine for the slowed pulse
Loss of sympathetic outflow below a high cervical lesion calls for vasopressors and atropine for the slowed pulse, restoring vascular tone and treating the symptomatic bradycardia alongside cautious fluid. Beta-blockers and digoxin for the rapid rhythm would deepen a rate that is already 52. Furosemide and nitrates for the raised preload strip volume and vasodilate a patient who is already vasodilated. Epinephrine and steroids for the allergy surge treat anaphylaxis, which the warm, dry, flushed skin of a cord injury only superficially resembles.
- An emergency nurse compares two patients in shock. One has warm, flushed extremities with a bounding pulse and low vascular resistance, and the other has cold, mottled extremities with a thready pulse. Which patient most likely has distributive (for example septic) shock?
- The patient with cooled, marbled skin and tight arterioles
- The patient with pallid, sweaty skin and steady arterioles
- The patient with reddened, hot skin and dilated arterioles
- The patient with dusky, waxen skin and narrowed arterioles
Correct answer: The patient with reddened, hot skin and dilated arterioles
Distributive shock, of which early sepsis is the example, presents as the patient with reddened, hot skin and dilated arterioles, because widespread vasodilation drops systemic resistance and gives a bounding pulse. The patient with cooled, marbled skin and tight arterioles shows the compensatory vasoconstriction of hypovolemic or cardiogenic shock. The patient with pallid, sweaty skin and steady arterioles is the same compensated picture. The patient with dusky, waxen skin and narrowed arterioles is a late, decompensated low-output state rather than the vasodilated one.
- A patient who chronically uses alcohol stopped drinking two days ago and now has tremor, tachycardia, diaphoresis, hypertension, and a brief generalized seizure. The emergency nurse should recognize alcohol withdrawal and anticipate which class of medication as first-line treatment?
- Narcotic preparations
- Antipsychotic therapy
- Adrenergic inhibitors
- Benzodiazepine agents
Correct answer: Benzodiazepine agents
Benzodiazepine agents are first-line, because they restore inhibitory tone in a hyperexcitable central nervous system, stop the seizures and prevent progression to delirium tremens, usually on symptom-triggered dosing. Narcotic preparations do nothing for the underlying receptor problem and add respiratory depression. Antipsychotic therapy lowers the seizure threshold and impairs heat dissipation. Adrenergic inhibitors mask the tremor and tachycardia while leaving the seizure risk untouched, which makes deterioration harder to detect.
- A patient brought in by emergency services has pinpoint pupils, a respiratory rate of 6, and decreased responsiveness after suspected opioid use. The emergency nurse should anticipate giving which medication to reverse the respiratory depression?
- Titrated intravenous naloxone
- Repeated empirical flumazenil
- Immediate bolus physostigmine
- Additional activated charcoal
Correct answer: Titrated intravenous naloxone
Titrated intravenous naloxone reverses the miosis, sedation and respiratory depression of opioid toxicity, and it is titrated to adequate breathing rather than full arousal, with watch kept for re-sedation and withdrawal. Repeated empirical flumazenil antagonizes benzodiazepines and can precipitate seizures. Immediate bolus physostigmine is the antidote for anticholinergic delirium, which would give dilated pupils and dry skin instead. Additional activated charcoal is a gut decontaminant and is unsafe in an obtunded patient with an unprotected airway.
- A young adult presents agitated, hyperthermic, diaphoretic, hypertensive, and tachycardic with dilated pupils after using a stimulant. The emergency nurse should recognize sympathomimetic toxicity and anticipate which initial pharmacologic intervention for the agitation and autonomic surge?
- Intravenous opioid analgesics
- Repeated benzodiazepine doses
- Isolated beta-blocker therapy
- Immediate intranasal naloxone
Correct answer: Repeated benzodiazepine doses
Repeated benzodiazepine doses are the initial pharmacologic treatment for stimulant toxicity, calming the agitation while lowering heart rate, blood pressure and temperature and protecting against seizures. Intravenous opioid analgesics sedate without addressing the autonomic surge and add respiratory depression to a hyperthermic patient. Isolated beta-blocker therapy raises the concern of unopposed alpha stimulation and worsening hypertension. Immediate intranasal naloxone reverses opioids, and the dilated pupils and hyperthermia here point away from an opioid cause.
- A malnourished patient with chronic alcohol use is admitted, and the emergency nurse plans to give thiamine before IV dextrose. The primary reason for this sequence is to prevent:
- Extensive demyelination
- Refractory hypoglycemia
- Wernicke encephalopathy
- Persistent hyperkalemia
Correct answer: Wernicke encephalopathy
Thiamine precedes or accompanies glucose in the malnourished patient to prevent Wernicke encephalopathy, since a glucose load consumes the last of a depleted thiamine store and can precipitate the confusion, ataxia and ophthalmoplegia triad. Extensive demyelination follows overly rapid sodium correction, not a glucose load. Refractory hypoglycemia is prevented by giving the dextrose, not by the order in which it is given. Persistent hyperkalemia is not a consequence of dextrose administration; refeeding drives potassium and phosphate down instead.
- A patient with severe gastroenteritis has had vomiting and diarrhea for three days and now has tachycardia, dry mucous membranes, oliguria, and orthostatic hypotension. The emergency nurse should recognize hypovolemia and prioritize which intervention?
- Upfront vasopressor titration
- Aggressive furosemide therapy
- Strict free-water restriction
- Prompt isotonic resuscitation
Correct answer: Prompt isotonic resuscitation
Three days of vomiting and diarrhea with dry membranes, oliguria and orthostatic change call for prompt isotonic resuscitation with normal saline or a balanced crystalloid to refill the intravascular space. Upfront vasopressor titration squeezes an empty circulation and is added only if hypotension persists after fluid. Aggressive furosemide therapy removes more of the volume the patient has already lost. Strict free-water restriction deepens the very deficit that is producing the oliguria.
- A patient with diabetic ketoacidosis is started on an insulin infusion and the glucose falls to 240 mg/dL while the anion gap remains elevated. The emergency nurse should anticipate which adjustment to fluids?
- Add dextrose to the fluids and keep the insulin drip
- Add water to the fluids and curtail the insulin drip
- Add saline to the fluids and double the insulin drip
- Add sodium to the fluids and cancel the insulin drip
Correct answer: Add dextrose to the fluids and keep the insulin drip
With glucose near 240 but the anion gap still open, the nurse should add dextrose to the fluids and keep the insulin drip, so insulin can go on clearing ketones without producing hypoglycemia. Add water to the fluids and curtail the insulin drip slows ketone clearance and gives a hypotonic load the patient does not need. Add saline to the fluids and double the insulin drip risks hypoglycemia and a fall in potassium without closing the gap faster. Add sodium to the fluids and cancel the insulin drip stops ketone clearance and lets the acidosis persist.
- An adult arrives after a house fire with circumferential burns to the entire front and back of the right arm, the entire anterior trunk, and the genitalia. Using the rule of nines, what is the estimated total body surface area burned?
- 37 percent, doubling the injured limb
- 28 percent, combining the three zones
- 46 percent, counting the entire torso
- 19 percent, omitting the injured limb
Correct answer: 28 percent, combining the three zones
The estimate is 28 percent, combining the three zones: a whole arm front and back is 9, the anterior trunk is 18, and the perineum is 1. The figure 37 percent, doubling the injured limb, counts a second arm that was never burned. The figure 46 percent, counting the entire torso, adds the posterior trunk, which is not involved. The figure 19 percent, omitting the injured limb, leaves out the arm entirely and so undercounts by 9.
- Using the adult rule of nines, the emergency nurse estimates burn size for a patient with partial-thickness burns covering the anterior surface of both lower extremities and the perineum. What total body surface area should the nurse document?
- 10 percent, halving the front figure
- 28 percent, adopting the trunk value
- 19 percent, adding the groin portion
- 37 percent, counting the entire legs
Correct answer: 19 percent, adding the groin portion
The documented estimate is 19 percent, adding the groin portion to the two anterior legs: each whole leg is 18, so each front surface is 9, giving 18, and the perineum adds 1. The figure 10 percent, halving the front figure, counts only one anterior leg plus the perineum. The figure 28 percent, adopting the trunk value, imports a chest and arm calculation that does not apply here. The figure 37 percent, counting the entire legs, uses both whole legs when only the front surfaces are burned.
- An 80 kg adult has deep partial- and full-thickness burns estimated at 30 percent total body surface area. Using the Parkland formula of 4 mL of lactated Ringer's per kilogram per percent burn, how much fluid should the emergency nurse plan to infuse during the FIRST 8 hours from the time of injury?
- 9600 mL, the complete daily quantity
- 7200 mL, the larger partial estimate
- 2400 mL, the smallest portion listed
- 4800 mL, the earliest half delivered
Correct answer: 4800 mL, the earliest half delivered
Four times 80 kg times 30 percent gives 9600 mL over 24 hours, and half of it goes in during the first eight hours from the moment of injury, so the answer is 4800 mL, the earliest half delivered. The figure 9600 mL, the complete daily quantity, is the whole 24-hour volume rather than the eight-hour share. The figure 7200 mL, the larger partial estimate, is three quarters of the total and matches no step of the formula. The figure 2400 mL, the smallest portion listed, is a quarter of the total and would leave the patient badly underresuscitated.
- A patient with a tibial shaft fracture in a cast reports deep, unrelenting calf pain that is markedly worse when the toes are passively stretched, and pain is not relieved by opioids. Which finding, in the context of the classic 6 P's, is the EARLIEST and most reliable sign the emergency nurse should act on for acute compartment syndrome?
- Severe ache, worsened by passive muscle stretch
- Absent pulses, blunted by proximal artery spasm
- Foot paralysis, marked by delayed motor failure
- Waxy pallor, driven by reduced capillary refill
Correct answer: Severe ache, worsened by passive muscle stretch
The earliest and most reliable finding is severe ache, worsened by passive muscle stretch, out of all proportion to the injury and unrelieved by opioids, and it appears while the limb is still salvageable. Absent pulses, blunted by proximal artery spasm, arrive late because arterial inflow persists until compartment pressure is very high. Foot paralysis, marked by delayed motor failure, follows nerve death and signals damage already done. Waxy pallor, driven by reduced capillary refill, is equally late and unreliable, so waiting for any of these three delays fasciotomy.
- During a forearm compartment pressure measurement, the emergency nurse notes a compartment pressure of 45 mmHg while the patient's diastolic blood pressure is 70 mmHg. Based on the delta (difference) pressure, what does the emergency nurse anticipate?
- Repeated measures, since the delta pressure surpasses 40 mmHg
- Urgent fasciotomy, since the delta pressure undercuts 30 mmHg
- Simple elevation, since the delta pressure approaches 50 mmHg
- Cold compression, since the delta pressure overshoots 60 mmHg
Correct answer: Urgent fasciotomy, since the delta pressure undercuts 30 mmHg
Delta pressure is the diastolic minus the compartment pressure, here 70 minus 45, so the nurse anticipates urgent fasciotomy, since the delta pressure undercuts 30 mmHg and tissue perfusion is inadequate. Repeated measures, since the delta pressure surpasses 40 mmHg, misreads a value of 25 as safe and wastes the salvage window. Simple elevation, since the delta pressure approaches 50 mmHg, is wrong twice over: the value is far lower, and raising the limb above the heart reduces arterial inflow. Cold compression, since the delta pressure overshoots 60 mmHg, further cuts perfusion to an already ischemic compartment.
- A patient pulled from a collapsed building after several hours of entrapment has dark tea-colored urine, diffuse muscle pain, and a creatine kinase of 28,000 units per liter. After securing the airway and circulation, which intervention is the priority to prevent acute kidney injury from rhabdomyolysis?
- Prompt hemodialysis to preserve the urine flow
- Sustained furosemide to squeeze the urine flow
- Aggressive crystalloid to boost the urine flow
- Cautious restriction to protect the urine flow
Correct answer: Aggressive crystalloid to boost the urine flow
After airway and circulation, the priority is aggressive crystalloid to boost the urine flow, running normal saline or lactated Ringer's titrated to roughly 200 mL of urine an hour so that myoglobin is flushed through the tubules. Prompt hemodialysis to preserve the urine flow is held back for refractory hyperkalemia, severe acidosis or established failure, not used as initial therapy. Sustained furosemide to squeeze the urine flow empties the vascular space and concentrates the pigment. Cautious restriction to protect the urine flow removes the one thing that prevents the injury.
- A patient with crush injury and rhabdomyolysis (creatine kinase greater than 25,000 units per liter) develops peaked T waves and a widening QRS on the monitor. Which medication should the emergency nurse anticipate administering FIRST?
- Swallowed polystyrene powder, which absorbs incrementally
- Nebulized albuterol aerosol, which shifts intracellularly
- Intravenous insulin infusion, which drives redistribution
- Intravenous calcium gluconate, which stabilizes membranes
Correct answer: Intravenous calcium gluconate, which stabilizes membranes
Peaked T waves with a widening QRS in crush-related hyperkalemia call first for intravenous calcium gluconate, which stabilizes membranes and guards the heart within minutes even though it removes no potassium. Swallowed polystyrene powder, which absorbs incrementally, works over hours and is far too slow to be first. Nebulized albuterol aerosol, which shifts intracellularly, needs 15 to 30 minutes to act. Intravenous insulin infusion, which drives redistribution, is also a shifting agent rather than a cardiac protectant and takes similar time.
- The emergency nurse is describing a long-bone injury in which the bone is broken into three or more fragments. Which fracture type is being documented?
- Comminuted bone fracture
- Transverse bone fracture
- Compressed bone fracture
- Greenstick bone fracture
Correct answer: Comminuted bone fracture
A comminuted bone fracture is one in which the shaft is shattered into three or more fragments, typically after high-energy trauma. A transverse bone fracture breaks straight across the shaft in a single line, leaving two pieces. A compressed bone fracture is a crushing collapse of cancellous bone, seen in vertebrae rather than a fragmented long-bone shaft. A greenstick bone fracture is an incomplete break in pliable pediatric bone, with one cortex bent rather than multiple fragments.
- A young child falls onto an outstretched hand, and imaging shows the forearm bone bent and cracked on one side but still intact on the opposite cortex. Which fracture type should the emergency nurse expect to see documented?
- Transverse fracture
- Epiphyseal fracture
- Greenstick fracture
- Comminuted fracture
Correct answer: Greenstick fracture
A greenstick fracture is an incomplete break in which one cortex fails while the opposite cortex bends and stays intact, a pattern seen almost exclusively in children whose bones are still pliable. A transverse fracture crosses the shaft completely, leaving no intact cortex on either side. An epiphyseal fracture disrupts the growth plate at the bone end rather than the bending midshaft cortex described here. A comminuted fracture leaves the bone in several separate fragments, which is not what an intact opposite cortex describes.
- A patient sustains an open femur fracture with bone visible through a 5 cm wound after a motorcycle crash. After controlling hemorrhage and assessing neurovascular status, which intervention is the emergency nurse's priority for the open fracture itself?
- Scrubbing the wound with a stiff abrasive pad and withholding antibiotics pending surgical debridement
- Sealing the wound with a dry impervious membrane and restricting antibiotics for documented cellulitis
- Reducing the exposed fragment back inside the wound and arranging antibiotics after hospital discharge
- Covering the wound with a sterile moist dressing and administering antibiotics and tetanus prophylaxis
Correct answer: Covering the wound with a sterile moist dressing and administering antibiotics and tetanus prophylaxis
Covering the wound with a sterile moist dressing and administering antibiotics and tetanus prophylaxis is the priority for the open fracture itself, because the bone is contaminated from the moment of injury and early antimicrobial cover plus a moist barrier is what lowers the deep infection and osteomyelitis rate. Scrubbing the wound with a stiff abrasive pad and withholding antibiotics pending surgical debridement drives debris deeper, destroys viable tissue, and delays the one measure that works. Sealing the wound with a dry impervious membrane and restricting antibiotics for documented cellulitis traps contamination against bone and treats infection only once it is established. Reducing the exposed fragment back inside the wound and arranging antibiotics after hospital discharge drags surface organisms into the medullary canal and leaves the patient unprotected.
- A patient with a suspected unstable pelvic fracture from a high-speed collision is hypotensive and tachycardic. Before definitive imaging, which intervention should the emergency nurse anticipate to limit ongoing hemorrhage?
- Wrapping a pelvic binder snugly around the trochanteric level
- Springing the pelvic brim manually to detect bony instability
- Turning the patient repeatedly to assess pelvic flank bruises
- Applying a pneumatic antishock garment across the pelvic ring
Correct answer: Wrapping a pelvic binder snugly around the trochanteric level
Wrapping a pelvic binder snugly around the trochanteric level is what limits ongoing bleeding: it closes the pelvic ring, reduces the internal volume the hematoma can fill, and tamponades the venous plexus while imaging is arranged. Springing the pelvic brim manually to detect bony instability tears the fragile clot that has already formed and can restart arterial bleeding. Turning the patient repeatedly to assess pelvic flank bruises shifts unstable fragments for information that will not change the immediate resuscitation. Applying a pneumatic antishock garment across the pelvic ring uses an abandoned device that raises afterload and splints the diaphragm without closing the ring.
- A patient presents with an anterior shoulder dislocation after a fall. Before and after any reduction attempt, which assessment is most critical for the emergency nurse to document?
- Radial nerve sensation over the dorsal webspace and wrist extension
- Axillary nerve sensation over the lateral deltoid and distal pulses
- Median nerve sensation over the thenar eminence and thumb abduction
- Ulnar nerve sensation over the hypothenar surface and finger spread
Correct answer: Axillary nerve sensation over the lateral deltoid and distal pulses
Axillary nerve sensation over the lateral deltoid and distal pulses is the assessment to document before and after any reduction attempt, because the axillary nerve wraps the surgical neck of the humerus and is the structure most often injured by the displaced head or by the reduction maneuver itself. Radial nerve sensation over the dorsal webspace and wrist extension screens a nerve threatened by humeral shaft injury, not by a glenohumeral dislocation. Median nerve sensation over the thenar eminence and thumb abduction reflects a wrist-level lesion well distal to the joint at risk. Ulnar nerve sensation over the hypothenar surface and finger spread reflects an elbow-level lesion and is likewise not the nerve draped over this dislocation.
- A construction worker arrives with a complete traumatic amputation of the thumb. Coworkers brought the severed part. To maximize the chance of successful replantation, how should the emergency nurse instruct that the amputated thumb be preserved?
- Soaked in povidone-iodine solution, placed in a paper cup, and set on soft foam
- Rinsed in sterile fluid, swaddled in a face-towel, and left on the warm counter
- Wrapped in saline-moistened gauze, sealed in a plastic bag, and laid on the ice
- Embedded in ice-cold slush, dipped in a slurry, and floated on the frigid water
Correct answer: Wrapped in saline-moistened gauze, sealed in a plastic bag, and laid on the ice
Wrapped in saline-moistened gauze, sealed in a plastic bag, and laid on the ice is the preservation method that maximizes replantation success, because the sealed bag keeps the part cool while the gauze and the bag together stop the tissue from touching ice directly. Soaked in povidone-iodine solution, placed in a paper cup, and set on soft foam fails twice over: antiseptic is cytotoxic to tissue that must be reperfused, and foam supplies no cooling at all. Rinsed in sterile fluid, swaddled in a face-towel, and left on the warm counter insulates the thumb at room temperature and speeds warm ischemia. Embedded in ice-cold slush, dipped in a slurry, and floated on the frigid water freezes the tissue directly, producing crystal injury and frostbite that make replantation impossible.
- A patient with extensive full-thickness circumferential burns to the chest develops rising peak airway pressures and difficulty ventilating despite a secure airway. Which intervention should the emergency nurse anticipate?
- Fastening a padded compression dressing across the chest wall
- Advancing a large-gauge needle catheter across the chest wall
- Raising the inspiratory pressures across the stiff chest wall
- Incising the constricting eschar across the burned chest wall
Correct answer: Incising the constricting eschar across the burned chest wall
Incising the constricting eschar across the burned chest wall, an escharotomy, is the anticipated intervention: a full-thickness circumferential burn forms a rigid inelastic shell that cannot expand as edema accumulates, and releasing it restores chest wall compliance at once. Fastening a padded compression dressing across the chest wall adds to the very restriction that is defeating ventilation. Advancing a large-gauge needle catheter across the chest wall decompresses a pneumothorax, which is not the mechanism here, and drives a needle through burned tissue into the pleural space. Raising the inspiratory pressures across the stiff chest wall forces gas past an external mechanical constraint and invites barotrauma without relieving it.
- A patient sustains a deep laceration to the volar forearm with brisk bleeding from a wound that occurred 90 minutes ago while gardening. After applying direct pressure and controlling the bleeding, which factor most strongly raises this wound's infection risk and guides the emergency nurse's plan?
- Soil contamination of the wound, which drives delayed closure and tetanus assessment
- Brisk hemorrhage of the wound, which drives immediate closure and pressure dressings
- Volar location of the wound, which drives deep closure and neurovascular examination
- Ninety-minute delay of the wound, which drives primary closure and antibiotic choice
Correct answer: Soil contamination of the wound, which drives delayed closure and tetanus assessment
Soil contamination of the wound, which drives delayed closure and tetanus assessment, is the factor that most raises infection risk here, because garden soil carries Clostridium tetani together with a heavy mixed bacterial load that primary closure would seal into the tissue. Brisk hemorrhage of the wound, which drives immediate closure and pressure dressings, describes a bleeding problem that has already been controlled and that, if anything, washes bacteria outward rather than inward. Volar location of the wound, which drives deep closure and neurovascular examination, matters for tendon and nerve injury but does not change the bacterial inoculum. Ninety-minute delay of the wound, which drives primary closure and antibiotic choice, sits well inside the interval during which primary closure is still acceptable, so elapsed time is not the driver.
- A 24-year-old presents with sharp anterior chest pain that worsens with deep breathing and is reproduced when the emergency nurse presses on the costosternal junctions. The ECG and troponin are normal. Which condition best explains these findings?
- Atypical pericarditis
- Acute costochondritis
- Subsegmental embolism
- Anterior pneumothorax
Correct answer: Acute costochondritis
Acute costochondritis best explains the picture: sharp anterior chest wall pain that is reproduced by palpation over the costosternal junctions and worsened by deep inspiration, with a normal ECG and troponin, is the defining pattern. Atypical pericarditis gives pain that shifts with posture and is usually accompanied by a friction rub and diffuse ST elevation, neither of which is present. A subsegmental embolism causes pleuritic pain but is never reproduced by pressing on the chest wall and would be expected to disturb oxygenation or heart rate. An anterior pneumothorax also gives pleuritic pain, yet it produces decreased breath sounds and hyperresonance rather than point tenderness over the joints.
- A patient with poorly controlled diabetes stepped on a nail two weeks ago and now has a chronically draining, tender area on the plantar foot with surrounding warmth and a low-grade fever. The emergency nurse recognizes these findings as most consistent with which musculoskeletal complication?
- Aseptic osteonecrosis
- Plantar tenosynovitis
- Chronic osteomyelitis
- Suppurative arthritis
Correct answer: Chronic osteomyelitis
Chronic osteomyelitis is most consistent with these findings: a deep puncture in a patient with poorly controlled diabetes that is still draining two weeks later, with local warmth, tenderness, and a low-grade fever, signals bone infection and calls for imaging, inflammatory markers, and prolonged antibiotics. Aseptic osteonecrosis is a noninfectious loss of bone blood supply and produces neither drainage nor fever. Plantar tenosynovitis inflames a flexor sheath and gives pain along the tendon line without a persistently draining tract down to bone. Suppurative arthritis is confined to a joint space and shows a hot swollen joint with severe pain on any motion rather than a chronically draining puncture site.
- A patient reports several days of low back pain that now includes numbness around the buttocks and inner thighs, new urinary retention, and decreased rectal tone. Which condition should the emergency nurse treat as a surgical emergency requiring immediate imaging?
- Chronic lumbar strain
- Mild sciatic neuritis
- Sacroiliac joint pain
- Cauda equina syndrome
Correct answer: Cauda equina syndrome
Cauda equina syndrome is the surgical emergency here, because saddle numbness over the buttocks and inner thighs, new urinary retention, and decreased rectal tone together mean the lumbosacral nerve roots are compressed, and emergent MRI with surgical decompression is what prevents permanent bladder and lower limb deficits. Chronic lumbar strain is a mechanical, self-limiting problem that never produces sphincter or saddle sensory loss. Mild sciatic neuritis gives unilateral radiating leg pain along a single root rather than bilateral perineal numbness with retention. Sacroiliac joint pain is reproduced by provocative pelvic maneuvers and carries no neurologic deficit whatsoever.
- While documenting a soft-tissue injury, the emergency nurse needs to distinguish a sprain from a strain. Which description correctly defines a sprain?
- An overstretching or tearing of a ligament at a joint
- An overextension or snapping of the muscle at a joint
- An inflammation or scarring of a cartilage at a joint
- An interruption or splintering of a cortex at a joint
Correct answer: An overstretching or tearing of a ligament at a joint
An overstretching or tearing of a ligament at a joint is the correct definition of a sprain, because ligaments are the bands that tie bone to bone and they fail when the joint is twisted or wrenched beyond its normal arc. An overextension or snapping of the muscle at a joint defines a strain instead, since a strain involves muscle or tendon rather than ligament. An inflammation or scarring of a cartilage at a joint describes chondral disease, a degenerative or inflammatory process and not an acute stretch injury. An interruption or splintering of a cortex at a joint describes a fracture, which is a break in bone continuity rather than a soft-tissue injury.
- A child stepped on a nail that pierced through a rubber-soled sneaker into the plantar foot. Beyond routine wound care and tetanus assessment, coverage for which organism is the specific concern the emergency nurse should anticipate with this mechanism?
- Streptococcus pyogenes
- Pseudomonas aeruginosa
- Staphylococcus capitis
- Mycobacterium chelonae
Correct answer: Pseudomonas aeruginosa
Pseudomonas aeruginosa is the organism to cover, because a nail driven through the moist foam lining of a rubber-soled sneaker inoculates Pseudomonas into the plantar tissue, and this mechanism carries a well-described risk of pseudomonal osteochondritis and osteomyelitis, so the antibiotic chosen has to have antipseudomonal activity. Streptococcus pyogenes causes cellulitis and lymphangitis but is not the footwear-specific pathogen and is already covered by ordinary skin regimens. Staphylococcus capitis is a coagulase-negative skin commensal that seldom seeds a deep puncture and would not change the regimen. Mycobacterium chelonae is a rapidly growing atypical mycobacterium linked to contaminated water and surgical inoculation rather than to sneaker punctures.
- An emergency nurse assessing a sacral wound finds full-thickness skin loss with visible subcutaneous fat but no exposed muscle, tendon, or bone, and no slough obscuring the depth. Using current pressure injury staging, how should this wound be staged?
- Stage 4 pressure injury, with fascial planes in view
- Stage 1 pressure injury, with local erythema in view
- Stage 3 pressure injury, with adipose tissue in view
- Stage 2 pressure injury, with shallow dermis in view
Correct answer: Stage 3 pressure injury, with adipose tissue in view
Stage 3 pressure injury, with adipose tissue in view is the correct staging: there is full-thickness skin loss and the subcutaneous fat is visible, while muscle, tendon, ligament, and bone stay covered and no slough hides the true depth. Stage 1 pressure injury, with local erythema in view describes intact skin carrying nonblanchable redness and no open area at all. Stage 2 pressure injury, with shallow dermis in view describes partial-thickness loss exposing a pink moist dermis or an intact serum-filled blister, and no fat is seen. Stage 4 pressure injury, with fascial planes in view requires exposed muscle, tendon, ligament, cartilage, or bone, which this sacral wound does not show.
- A patient who was an unrestrained front-seat passenger in a head-on collision presents with the hip flexed, adducted, and internally rotated and severe hip pain. The emergency nurse suspects a posterior hip dislocation and prioritizes assessment of which nerve that is most at risk?
- Femoral nerve
- Gluteal nerve
- Cluneal nerve
- Sciatic nerve
Correct answer: Sciatic nerve
The sciatic nerve is the structure most at risk, because it runs immediately posterior to the hip joint, so a femoral head driven backward out of the acetabulum stretches or compresses it and produces foot drop with sensory loss over the lateral leg and dorsal foot. The femoral nerve lies anterior to the joint and is threatened by an anterior dislocation, not by this posterior mechanism. The gluteal nerve supplies the abductors and is injured by direct buttock trauma or by a surgical approach rather than by posterior displacement of the head. The cluneal nerve is a purely cutaneous branch over the buttock skin and carries no motor consequence of this kind.
- When applying a rigid splint to a patient with a midshaft forearm fracture, which principle should the emergency nurse follow to immobilize the injury correctly?
- Immobilize the joints above and below the fracture site
- Immobilize the joints below and reset the full fracture
- Immobilize the joints and tie the fracture very tightly
- Immobilize the fracture shaft and free the joints above
Correct answer: Immobilize the joints above and below the fracture site
Immobilize the joints above and below the fracture site is the principle to follow, because a rigid splint controls a midshaft forearm fracture only when the joint on each side is captured; leaving either one free lets the fragments hinge, worsening pain, soft-tissue damage, and neurovascular injury. Immobilize the joints below and reset the full fracture is wrong because bedside reduction is not needed before splinting and manipulating the fragments first risks further harm. Immobilize the joints and tie the fracture very tightly is wrong because a splint applied at maximum tension compresses tissue as swelling develops and can precipitate compartment syndrome. Immobilize the fracture shaft and free the joints above leaves an adjacent joint able to move the fragments, which is exactly what splinting exists to prevent.
- A patient bitten on the hand by another person during an altercation has a wound over the knuckle. Compared with many other wounds, how should the emergency nurse anticipate this human bite being managed?
- Repaired as a shallow wound, stitched and wrapped very tightly, with topical antibiotics
- Treated as a high infection risk, irrigated and left open, with prophylactic antibiotics
- Watched as a minor puncture, rinsed and draped too loosely, with symptomatic antibiotics
- Bandaged as a trivial abrasion, cleaned and pulled fully shut, with deferred antibiotics
Correct answer: Treated as a high infection risk, irrigated and left open, with prophylactic antibiotics
Treated as a high infection risk, irrigated and left open, with prophylactic antibiotics is how a clenched-fist human bite over the knuckle is managed, because the tooth drives oral flora such as Eikenella corrodens through the extensor tendon and into the joint capsule, and closing that space seals the inoculum inside. Repaired as a shallow wound, stitched and wrapped very tightly, with topical antibiotics buries contaminated tissue, and a topical agent never reaches the joint. Watched as a minor puncture, rinsed and draped too loosely, with symptomatic antibiotics waits for an infection that is already established by the time redness appears. Bandaged as a trivial abrasion, cleaned and pulled fully shut, with deferred antibiotics both closes the tract and withholds the cover that prevents septic arthritis of the knuckle.
- A 58-year-old man arrives reporting sudden, painless loss of vision in his right eye that started about 40 minutes ago, like a curtain dropping. He has atrial fibrillation. The emergency nurse should recognize that this presentation is most consistent with which condition?
- Arteritic optic nerve neuropathy
- Partial nasal retinal detachment
- Central retinal artery occlusion
- Acute vitreous cavity hemorrhage
Correct answer: Central retinal artery occlusion
Central retinal artery occlusion fits this presentation: painless monocular loss that arrives within seconds and is described as a curtain or shade coming down, in a man whose atrial fibrillation supplies the embolic source, is the classic picture and is handled as a stroke of the eye. Arteritic optic nerve neuropathy also causes abrupt painless loss, but it belongs to giant cell arteritis and comes with jaw claudication, scalp tenderness, and a markedly raised inflammatory marker. Partial nasal retinal detachment produces a curtain preceded by flashes and a shower of floaters and advances over hours, not seconds. Acute vitreous cavity hemorrhage clouds vision with floaters and a dulled red reflex rather than the abrupt complete loss described here.
- The emergency nurse is caring for a patient with a confirmed central retinal artery occlusion that began less than two hours ago. Which intervention is the emergency nurse most likely to anticipate as a temporizing measure while ophthalmology and stroke services are activated?
- Continuous warmed ocular compresses and pilocarpine to constrict pupillary sphincter
- Bilateral tight ocular patches and dexamethasone to counteract retinal deterioration
- Immediate intravitreal ocular injection and bevacizumab to halt neovascular membrane
- Intermittent digital ocular massage and acetazolamide to reduce intraocular pressure
Correct answer: Intermittent digital ocular massage and acetazolamide to reduce intraocular pressure
Intermittent digital ocular massage and acetazolamide to reduce intraocular pressure is the temporizing pair to anticipate, because dropping the pressure behind the globe widens the gradient across the occluded artery and can shift the embolus distally while stroke and ophthalmology services organize definitive care. Continuous warmed ocular compresses and pilocarpine to constrict pupillary sphincter treats angle closure, a different disease entirely, and squeezing the pupil does nothing to an arterial embolus. Bilateral tight ocular patches and dexamethasone to counteract retinal deterioration immobilizes a patient whose retina is infarcting by the minute, and steroids do not reopen an artery. Immediate intravitreal ocular injection and bevacizumab to halt neovascular membrane treats neovascular macular disease that develops over months rather than this acute occlusion.
- A 64-year-old woman presents at night with severe right eye pain, blurred vision, halos around lights, nausea, and vomiting. On exam her right pupil is mid-dilated and fixed, and the cornea appears hazy. The emergency nurse recognizes that the elevated intraocular pressure in this condition is caused by which mechanism?
- Obstruction of the aqueous humor outflow at the iridocorneal angle
- Thrombosis of the central retinal venules at the prelaminar region
- Separation of the entire sensory retina at the choroidal interface
- Hemorrhage of the fragile ciliary vessels at the subhyaloid cavity
Correct answer: Obstruction of the aqueous humor outflow at the iridocorneal angle
Obstruction of the aqueous humor outflow at the iridocorneal angle is the mechanism of acute angle-closure glaucoma: the peripheral iris is pressed against the trabecular meshwork, aqueous cannot drain, and pressure climbs within hours, producing pain, a mid-dilated fixed pupil, corneal haze, halos, nausea, and vomiting. Thrombosis of the central retinal venules at the prelaminar region is a venous occlusion, which blurs vision painlessly and leaves a soft eye rather than a rock-hard one. Separation of the entire sensory retina at the choroidal interface is painless and announces itself with flashes and floaters. Hemorrhage of the fragile ciliary vessels at the subhyaloid cavity clouds the media without raising intraocular pressure at all.
- A patient with acute angle-closure glaucoma is being treated in the emergency department. After pressure-lowering medications are started, the emergency nurse understands that the only definitive treatment to prevent recurrence in the affected and the unaffected eye is which of the following?
- Daily topical beta-blocker
- Laser peripheral iridotomy
- Repeat parenteral mannitol
- Trabecular meshwork device
Correct answer: Laser peripheral iridotomy
Laser peripheral iridotomy is the definitive treatment, because it opens a small channel through the iris that lets aqueous pass straight from the posterior to the anterior chamber, relieving pupillary block for good, and it is performed on the fellow eye as well since that eye shares the same narrow anatomy. Daily topical beta-blocker drops only reduce aqueous production and never correct the anatomic block. Repeat parenteral mannitol pulls fluid osmotically out of the vitreous as a short emergency measure and cannot be sustained. Trabecular meshwork device is an open-angle implant that drains through the very meshwork a closed iris is covering, so it does nothing for pupillary block.
- A 35-year-old presents with a three-day history of worsening sore throat, now with muffled hot-potato voice, drooling, trismus, and the uvula deviated to the left. The emergency nurse recognizes these findings as most consistent with which diagnosis?
- Deep parapharyngeal abscess
- Mild follicular tonsillitis
- Acute peritonsillar abscess
- Viral exudative pharyngitis
Correct answer: Acute peritonsillar abscess
Acute peritonsillar abscess is the diagnosis: pus collecting between the tonsillar capsule and the superior constrictor pushes the tonsil medially and shifts the uvula to the opposite side, and it produces exactly this combination of hot-potato voice, trismus, and drooling after several days of worsening sore throat. Deep parapharyngeal abscess also causes trismus but bulges the lateral pharyngeal wall with neck swelling and torticollis instead of deviating the uvula. Mild follicular tonsillitis is bilateral, shows exudate on both tonsils, and causes neither trismus nor uvular shift. Viral exudative pharyngitis gives diffuse mucosal inflammation and odynophagia without a unilateral bulge or a muffled voice.
- A patient with a peritonsillar abscess is scheduled for bedside needle aspiration. While preparing the patient, the emergency nurse should prioritize having which equipment immediately available?
- Bladder and drainage catheter equipment
- Coronary and rhythm telemetry equipment
- Warmth and forced-air blanket equipment
- Suction and airway management equipment
Correct answer: Suction and airway management equipment
Suction and airway management equipment is what has to be at the bedside, because puncturing an abscess beside the airway can release a bolus of pus into the pharynx, and trismus, edema, and bleeding can turn a routine drainage into an emergency airway. Bladder and drainage catheter equipment belongs to a urinary procedure and contributes nothing here. Coronary and rhythm telemetry equipment tracks a cardiac problem this patient does not have and would not help if the pharynx flooded. Warmth and forced-air blanket equipment addresses hypothermia, which is not a hazard of a brief seated aspiration.
- A 50-year-old with poor dentition presents with bilateral submandibular swelling, a brawny indurated neck, an elevated and protruding tongue, drooling, and a muffled voice. The emergency nurse recognizes that the single greatest threat to this patient's life is which of the following?
- Rapidly progressing airway obstruction
- Rapidly descending mediastinal abscess
- Rapidly expanding submental hemorrhage
- Rapidly worsening aspiration pneumonia
Correct answer: Rapidly progressing airway obstruction
Rapidly progressing airway obstruction is the single greatest threat, because Ludwig angina is a spreading cellulitis of the bilateral submandibular, sublingual, and submental spaces that lifts the floor of the mouth and drives the tongue upward and backward until the pharynx closes off; asphyxia is the leading cause of death. Rapidly descending mediastinal abscess is a real late complication but evolves over days and is not what kills in the first hours. Rapidly expanding submental hemorrhage is not a feature of this infection, which produces brawny induration rather than bleeding. Rapidly worsening aspiration pneumonia can follow a lost airway, so it is a consequence of the airway problem rather than the primary threat.
- The emergency team is preparing to secure the airway of a patient with Ludwig's angina who has marked floor-of-mouth swelling and trismus. The emergency nurse should anticipate that the safest airway approach in this scenario is most likely which of the following?
- Rapid induction laryngoscopy with routine airway blades
- Awake fiberoptic intubation with surgical airway backup
- Delayed neck tomography with unprotected airway control
- Initial supraglottic rescue with final airway placement
Correct answer: Awake fiberoptic intubation with surgical airway backup
Awake fiberoptic intubation with surgical airway backup is the safest approach, because trismus and floor-of-mouth swelling distort the anatomy so badly that a paralytic can leave a patient who can be neither intubated nor ventilated, while an awake technique preserves spontaneous breathing and a surgeon stands scrubbed at the neck. Rapid induction laryngoscopy with routine airway blades discards that safety net at exactly the moment the laryngeal view is likely to be impossible. Delayed neck tomography with unprotected airway control sends a deteriorating patient out of the resuscitation room with nothing holding the airway open. Initial supraglottic rescue with final airway placement fails because a supraglottic device seats above the very swelling causing the obstruction and can never be the definitive airway here.
- A patient presents with an anterior nosebleed that has not stopped after ten minutes. After the emergency nurse confirms the patient is hemodynamically stable, which initial first-line measure should be performed?
- Rest the patient tipping backward and swallow the draining blood for ten to fifteen minutes
- Pack the patient standing upright and place the petrolatum gauze for ten to fifteen minutes
- Seat the patient leaning forward and compress the soft cartilage for ten to fifteen minutes
- Rub the patient sitting sideways and cauterize the septal mucosa for ten to fifteen minutes
Correct answer: Seat the patient leaning forward and compress the soft cartilage for ten to fifteen minutes
Seat the patient leaning forward and compress the soft cartilage for ten to fifteen minutes is the first-line measure: firm uninterrupted pressure on the soft cartilaginous part of the nose squeezes the Kiesselbach plexus against the septum and lets a clot form, while leaning forward keeps blood out of the pharynx. Rest the patient tipping backward and swallow the draining blood for ten to fifteen minutes sends blood down the throat, hiding the true loss and inviting aspiration and vomiting. Pack the patient standing upright and place the petrolatum gauze for ten to fifteen minutes jumps to packing before simple pressure and a topical vasoconstrictor have been tried. Rub the patient sitting sideways and cauterize the septal mucosa for ten to fifteen minutes burns an unprepared, actively bleeding field, and blind cautery of the septum risks perforation.
- An anterior nosebleed continues despite several minutes of direct pressure. The emergency nurse anticipates the next pharmacologic step is application of a topical vasoconstrictor. Which agent is commonly used for this purpose?
- Timolol applied to the corneal epithelium
- Albuterol applied to the bronchial tissue
- Bacitracin applied to the bare turbinates
- Oxymetazoline applied to the nasal mucosa
Correct answer: Oxymetazoline applied to the nasal mucosa
Oxymetazoline applied to the nasal mucosa is the agent commonly used, because it is an alpha-adrenergic agonist that constricts mucosal vessels directly and, together with continued pressure, controls a large share of anterior bleeds before cautery or packing becomes necessary. Timolol applied to the corneal epithelium is a beta-blocker glaucoma drop with no nasal or hemostatic role at all. Albuterol applied to the bronchial tissue is a beta-agonist bronchodilator that relaxes smooth muscle instead of constricting vessels. Bacitracin applied to the bare turbinates is an antibiotic ointment that lubricates and protects the surface but exerts no vasoconstriction whatever.
- A patient with a heavy posterior nosebleed has had a posterior nasal pack placed for ongoing bleeding. The emergency nurse understands that, compared with an anterior pack, a posterior pack requires which additional precaution?
- Close observation for airway compromise and hypoxia, with admission and cardiorespiratory monitoring
- Continuous refrigeration for external packing and nostrils, with icepacks and unrelieved compression
- Routine rescreening for immediate discharge and transfer, with telephone and outpatient instructions
- Instant withdrawal for transient discomfort and tenderness, with reinsertion and watching afterwards
Correct answer: Close observation for airway compromise and hypoxia, with admission and cardiorespiratory monitoring
Close observation for airway compromise and hypoxia, with admission and cardiorespiratory monitoring is the precaution a posterior pack adds, because the pack can slip backward into the pharynx, obstruct the airway, and provoke the hypoxia and bradycardia described as the nasopulmonary reflex; posterior bleeds are also heavier, so inpatient observation and ENT involvement are standard. Continuous refrigeration for external packing and nostrils, with icepacks and unrelieved compression does nothing for a bleed arising behind the turbinates and injures the skin. Routine rescreening for immediate discharge and transfer, with telephone and outpatient instructions sends home the very patient who needs watching. Instant withdrawal for transient discomfort and tenderness, with reinsertion and watching afterwards would pull a pack that is uncomfortable by design and restart torrential bleeding.
- A 6-year-old child is brought in after sticking a small bead into the nose, now with a unilateral foul-smelling, purulent nasal discharge. The emergency nurse recognizes that a unilateral malodorous discharge in a young child most strongly suggests which condition?
- A chronic nasal allergic drip
- A retained nasal foreign body
- A bacterial nasal sinus flare
- A traumatic nasal spinal leak
Correct answer: A retained nasal foreign body
A retained nasal foreign body is what a unilateral, foul-smelling, purulent discharge in a young child means until proved otherwise, because an object lodged in one nostril irritates the mucosa and breeds anaerobes on that side alone. A chronic nasal allergic drip is bilateral, watery, and itchy rather than one-sided and purulent. A bacterial nasal sinus flare in a child this age also affects both sides and follows a viral illness rather than an insertion. A traumatic nasal spinal leak produces clear, watery, odorless fluid, not thick malodorous pus.
- An adult presents with a button battery lodged in the nasal cavity. The emergency nurse understands that, compared with an inert bead, a button battery requires which approach?
- Expectant delay to permit spontaneous passage and unassisted expulsion
- Outpatient referral to schedule elective retrieval and deferred review
- Urgent removal to prevent liquefactive necrosis and septal perforation
- Repeated irrigation to flush residual alkaline and dilute electrolytes
Correct answer: Urgent removal to prevent liquefactive necrosis and septal perforation
Urgent removal to prevent liquefactive necrosis and septal perforation is what a nasal button battery demands, because current flowing across moist mucosa generates hydroxide at the negative pole and liquefies tissue within hours, so the septum can be destroyed the same day. Expectant delay to permit spontaneous passage and unassisted expulsion treats the battery like the inert bead it is not and lets the injury run unchecked. Outpatient referral to schedule elective retrieval and deferred review builds in exactly the delay that causes the damage. Repeated irrigation to flush residual alkaline and dilute electrolytes is actively harmful, since added moisture completes the circuit and accelerates the caustic reaction.
- A patient with severe necrotizing (malignant) otitis externa is being evaluated. The emergency nurse recognizes that this aggressive infection occurs most commonly in which patient population and is most often caused by which organism?
- Active swimmers with eczema, caused by Staphylococcus aureus
- Healthy children with itchiness, caused by Aspergillus niger
- Frail smokers with otorrhea, caused by Klebsiella pneumoniae
- Older adults with diabetes, caused by Pseudomonas aeruginosa
Correct answer: Older adults with diabetes, caused by Pseudomonas aeruginosa
Older adults with diabetes, caused by Pseudomonas aeruginosa is the correct pairing: necrotizing otitis externa is a skull-base osteomyelitis that starts in the ear canal of an elderly, poorly controlled diabetic or otherwise immunocompromised host, and Pseudomonas is the organism in the great majority of cases. Active swimmers with eczema, caused by Staphylococcus aureus describes ordinary swimmer's ear, a self-limiting canal infection with no bone involvement. Healthy children with itchiness, caused by Aspergillus niger describes otomycosis, which itches and shows visible fungal debris but never invades the skull base. Frail smokers with otorrhea, caused by Klebsiella pneumoniae names a host who sounds plausible but an organism that is not the classic cause and would not drive empiric antipseudomonal therapy.
- A 22-year-old is brought in after blunt trauma to the side of the head and now has a tense, fluctuant swelling of the outer ear after the cartilage was injured. The emergency nurse anticipates which intervention to prevent a permanent cosmetic deformity?
- Prompt drainage of the auricular hematoma followed by a compressive dressing
- Unrelenting massage of the fluctuant auricle followed by a soothing compress
- Antibiotic ointment of the painful swelling followed by a protective bandage
- Repeated aspiration of the throbbing collection followed by a loosened gauze
Correct answer: Prompt drainage of the auricular hematoma followed by a compressive dressing
Prompt drainage of the auricular hematoma followed by a compressive dressing is what prevents cauliflower ear, because blood trapped between the perichondrium and the cartilage strips the cartilage of its only blood supply; evacuating it and then holding the layers together with a bolster stops the fibrosis and new cartilage that deform the ear. Unrelenting massage of the fluctuant auricle followed by a soothing compress leaves the clot where it is and adds fresh trauma to injured cartilage. Antibiotic ointment of the painful swelling followed by a protective bandage treats a surface that is not infected and never decompresses the collection. Repeated aspiration of the throbbing collection followed by a loosened gauze removes the blood but, with no firm compression, lets it reaccumulate within hours.
- A patient presents with sudden, severe vertigo, nausea, and vomiting that is worsened by head movement. The emergency nurse understands that the structure most directly responsible for this type of peripheral vertigo is located in which area?
- The external auditory cartilaginous duct
- The inner labyrinth vestibular apparatus
- The middle conductive ossicular assembly
- The frontal cortical cerebral hemisphere
Correct answer: The inner labyrinth vestibular apparatus
The inner labyrinth vestibular apparatus is the structure directly responsible, because the semicircular canals and otolith organs sense head position and acceleration, and disease there produces the intense positional spinning, nausea, and vomiting of peripheral vertigo. The external auditory cartilaginous duct merely channels sound waves inward and generates no balance signal at all. The middle conductive ossicular assembly transmits vibration to the oval window and likewise carries no positional information. The frontal cortical cerebral hemisphere belongs to central processing, and a central cause such as cerebellar stroke is what must be excluded whenever focal neurologic signs accompany the vertigo.
- An adult presents with acute mastoiditis as a complication of untreated otitis media, with postauricular redness, swelling, tenderness, and an ear that appears pushed forward. The emergency nurse recognizes that the chief concern with mastoiditis is which of the following?
- Irreversible loss of olfaction, such as anosmia or a flavor disturbance
- Unexpected upsurge of pressure, such as glaucoma or a vision impairment
- Intracranial spread of infection, such as meningitis or a brain abscess
- Mechanical rupture of eardrum, such as perforation or a sensory deficit
Correct answer: Intracranial spread of infection, such as meningitis or a brain abscess
Intracranial spread of infection, such as meningitis or a brain abscess is the chief concern, because the mastoid air cells lie directly against the posterior and middle cranial fossae, so coalescent mastoiditis can breach bone into the meninges, the epidural space, or a venous sinus. Postauricular swelling with a protruding auricle means the infection has already entered bone and demands intravenous antibiotics, imaging, and urgent specialist review. Irreversible loss of olfaction, such as anosmia or a flavor disturbance belongs to cribriform plate injury and has no anatomic route from the mastoid. Unexpected upsurge of pressure, such as glaucoma or a vision impairment is an ocular problem unrelated to middle ear disease. Mechanical rupture of eardrum, such as perforation or a sensory deficit can happen, but hearing change is the minor worry beside intracranial extension.
- A patient sustained facial trauma and now has clear fluid dripping from the nose. The emergency nurse suspects a CSF leak from a basilar skull or cribriform plate injury. Which bedside finding would best support cerebrospinal fluid rhinorrhea rather than simple nasal drainage?
- A green tint on gauze wrapping with a foul offensive smell
- A total stoppage on lying supine with a wholly dry nostril
- A bright stain on linen padding with a swift clotted crust
- A halo ring on filter paper with a positive glucose result
Correct answer: A halo ring on filter paper with a positive glucose result
A halo ring on filter paper with a positive glucose result is the bedside finding that supports cerebrospinal fluid rhinorrhea, because CSF migrates outward faster than blood on absorbent paper and leaves a clear outer ring around a central bloody spot, and CSF carries glucose while ordinary nasal mucus does not; beta-2 transferrin remains the definitive confirmation. A green tint on gauze wrapping with a foul offensive smell points to infection or a retained foreign body rather than to spinal fluid. A total stoppage on lying supine with a wholly dry nostril is backwards, since a leak typically increases when the head is lowered or the patient leans forward. A bright stain on linen padding with a swift clotted crust describes ordinary epistaxis, and cerebrospinal fluid does not clot.
