What score do I need to pass the CEN exam?

To pass the CEN you must answer approximately 106 of the 150 scored items correctly — about 71% — under a criterion-referenced passing standard. The 25 unscored pretest questions do not count. Results are reported as pass/fail immediately at the end of the exam, and the exact standard can change when BCEN updates its role delineation study.

What are the eligibility requirements for the CEN exam?

You must hold a current, unrestricted RN license in the United States, a US territory, Canada, Australia, or an equivalent license. BCEN does not require a fixed amount of experience to sit for the exam but recommends at least two years of emergency nursing practice, since the exam reflects real emergency department competencies. There is no separate degree requirement beyond RN licensure.

How much does the CEN exam cost and can I retake it?

The exam fee is approximately $285 for Emergency Nurses Association (ENA) members and $380 for non-members, with reduced fees for active-duty military (about $195) and veterans (confirm current pricing at bcen.org). If you do not pass, you may reapply and retest after a waiting period, paying a new fee for each attempt. Running full content-weighted practice tests between attempts is the best way to close the gap on weak domains.

How long is the CEN certification valid and how do I renew it?

CEN certification is valid for four years. You can renew either by retaking the exam or through the CEN Renewal continuing-education pathway, which requires earning 100 continuing education points in approved emergency-nursing topics during your four-year cycle. Letting certification lapse can require recertifying from the start, so track CE and renew through bcen.org before your expiration date.

Is the CEN open-book, and what's provided on test day?

No, the CEN is closed-book — no notes, textbooks, or reference materials are allowed. It's a computer-based exam delivered through Pearson VUE at a test center or via live online proctoring, and everything you need is on screen. You store your phone and belongings in a locker but are given scratch material for working through scenarios, and a short tutorial precedes the timed exam. There are no scheduled breaks during the 3-hour session.

What's the best way to study for the CEN?

The best way to study for the CEN is full-length, content-weighted practice tests that mirror the BCEN blueprint, followed by targeted drilling of your weakest domains — important because the exam spans 11 weighted domains and has a first-attempt pass rate near 49%. Prioritize the highest-weighted areas — cardiovascular, respiratory, and neurological emergencies — and pair timed practice with focused review so you build both speed and recall before test day.

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?

Administer intravenous beta-blockers.

Perform synchronized cardioversion.

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?

Transesophageal echocardiogram (TEE)

Transthoracic echocardiogram (TTE)

A patient arrives in the emergency department with signs of cardiogenic shock. Which of the following hemodynamic parameters is typically observed in cardiogenic shock?

Low cardiac output, high systemic vascular resistance

Low cardiac output, low systemic vascular resistance

High cardiac output, high systemic vascular resistance

High cardiac output, low systemic vascular resistance

In the management of acute pulmonary edema secondary to heart failure, which of the following interventions is primarily aimed at reducing preload?

Administration of beta-blockers

Administration of high-flow oxygen

Non-invasive positive pressure ventilation (NIPPV)

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?

Order a 24-hour Holter monitor.

Initiate anticoagulation therapy.

Schedule for immediate electrical cardioversion.

In a patient with acute pericarditis, which of the following ECG findings is most characteristic?

ST-segment elevation in all leads

Deep Q waves in leads II, III, and aVF

ST-segment depression in leads V1-V4

Which of the following is the preferred treatment for a patient presenting with symptomatic bradycardia with a heart rate of 40 bpm and hypotension?

Immediate synchronized cardioversion

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?

Elevated B-type natriuretic peptide (BNP)

In a patient presenting with suspected Takotsubo cardiomyopathy, which of the following echocardiographic findings is most characteristic?

Apical ballooning of the left ventricle

Fixed obstruction of the left ventricular outflow tract

Dilatation of the right ventricle

Hypertrophy of the interventricular septum

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

Intravenous insulin and dextrose

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?

CT scan of the chest with contrast

In a patient with suspected tension pneumothorax, what is the most immediate course of action?

Perform needle decompression at the second intercostal space, midclavicular line

Administer high-flow oxygen and prepare for chest tube placement

Initiate broad-spectrum antibiotics

Provide nebulized bronchodilators

A patient with COPD presents with a sudden exacerbation of symptoms. What is the most effective initial treatment?

Systemic corticosteroids and bronchodilators

High-dose inhaled corticosteroids

A patient arrives with suspected epiglottitis. Which of the following signs is a priority for establishing the diagnosis?

Drooling and difficulty swallowing

In the management of acute asthma exacerbation, which of the following medications is considered first-line therapy?

Short-acting beta-agonists (SABAs)

For a patient with a flail chest, which of the following is the most appropriate management strategy?

Pain management and careful monitoring for respiratory distress

Immediate intubation and mechanical ventilation

In the case of a patient presenting with carbon monoxide poisoning, which of the following treatments is most effective?

High-flow oxygen through a non-rebreather mask

For a patient experiencing an acute pulmonary edema, which of the following interventions should be prioritized?

Upright positioning and oxygen therapy

What is the most specific sign of a tension pneumothorax on chest X-ray?

Mediastinal shift to the opposite side

Hyperexpansion of the affected hemithorax

Collapse of the ipsilateral lung

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 respiratory distress syndrome (ARDS)

For a patient with acute respiratory distress and a known history of sarcoidosis, which of the following is the most appropriate management strategy?

High-flow oxygen and corticosteroid therapy

Immediate administration of antitubercular therapy

Empirical antibiotics and nebulized bronchodilators

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?

Administration of IV rtPA if within the window period and no contraindications

Immediate administration of oral antihypertensive medication

Wait for spontaneous blood pressure reduction before any intervention

Immediate lowering of blood pressure using IV medication to a target of <120/80 mmHg

In a patient with suspected bacterial meningitis, which of the following findings in cerebrospinal fluid (CSF) analysis is most indicative of the condition?

Decreased glucose, increased protein, increased white blood cells with a predominance of neutrophils

Decreased glucose, increased protein, increased white blood cells with a predominance of lymphocytes

Increased glucose, decreased protein, increased white blood cells with a predominance of neutrophils

Increased glucose, increased protein, decreased white blood cells

Your FREE Certified Emergency Nurse (CEN) Practice Test 2026 – 390+ Q&A

Q: What is on the CEN exam?

The CEN Examination Content Outline covers 11 weighted domains: Cardiovascular (18 items), Respiratory (17), Neurological (17), Gastrointestinal (14), Genitourinary/Gynecology/Obstetrical (10), Mental Health (13), Medical (15), Musculoskeletal & Wound (11), Head/Eye/Ear/Nose/Throat (10), Environment/Toxicology/Communicable Diseases (13), and Professional Issues (12). Cardiovascular, respiratory, and neurological emergencies make up roughly a third of the exam.

Prepare with realistic, BCEN exam-style questions — take a full CEN practice test or drill one clinical domain.

Master questions to boost your scoreMaster questions to raise your exam readiness score

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CEN Practice Questions

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?
- Administer intravenous beta-blockers.
- Perform synchronized cardioversion.
- Start intravenous heparin.
- Give sublingual nitroglycerin.
Correct answer: Administer intravenous beta-blockers.
Correct answer: Administer intravenous beta-blockers. Explanation: The description is consistent with atrial fibrillation, characterized by an irregularly irregular rhythm and absence of P waves on ECG. The initial management focuses on rate control, typically with intravenous beta-blockers, to reduce the ventricular rate and alleviate symptoms.
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 echocardiogram (TTE)
- Transesophageal echocardiogram (TEE)
- 12-lead ECG
- Chest X-ray
Correct answer: Transesophageal echocardiogram (TEE)
Correct answer: Transesophageal echocardiogram (TEE). Explanation: TEE is more sensitive and specific than TTE for diagnosing aortic dissection, especially in the acute setting, because it provides a closer and clearer image of the ascending aorta and aortic arch, areas commonly affected by dissection.
A patient arrives in the emergency department with signs of cardiogenic shock. Which of the following hemodynamic parameters is typically observed in cardiogenic shock?
- Low cardiac output, low systemic vascular resistance
- High cardiac output, high systemic vascular resistance
- Low cardiac output, high systemic vascular resistance
- High cardiac output, low systemic vascular resistance
Correct answer: Low cardiac output, high systemic vascular resistance
Correct answer: Low cardiac output, high systemic vascular resistance. Explanation: Cardiogenic shock is characterized by inadequate tissue perfusion due to decreased cardiac output, despite normal or increased preload, and is often accompanied by increased systemic vascular resistance as the body attempts to compensate for the reduced cardiac output.
In a patient presenting with acute myocardial infarction (AMI), which of the following ECG changes most specifically indicates injury to the myocardium?
- T-wave inversion
- ST-segment elevation
- Presence of Q waves
- ST-segment depression
Correct answer: ST-segment elevation
Correct answer: ST-segment elevation. Explanation: ST-segment elevation is a specific indicator of myocardial injury and is considered a key diagnostic criterion for acute myocardial infarction (AMI), reflecting active and ongoing injury to the heart muscle.
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?
- Aspirin
- Morphine
- Nitroglycerin
- Dobutamine
Correct answer: Dobutamine
Correct answer: Dobutamine. Explanation: Dobutamine is a beta-adrenergic agonist that increases heart rate and myocardial contractility, thereby increasing myocardial oxygen demand. In the context of myocardial infarction, increasing oxygen demand on an already compromised heart can worsen the patient's condition.
In the management of acute pulmonary edema secondary to heart failure, which of the following interventions is primarily aimed at reducing preload?
- Administration of beta-blockers
- Administration of high-flow oxygen
- Nitroglycerin administration
- Non-invasive positive pressure ventilation (NIPPV)
Correct answer: Nitroglycerin administration
Correct answer: Nitroglycerin administration. Explanation: Nitroglycerin is a vasodilator that primarily reduces preload (the volume of blood returning to the heart) by dilating venous capacitance vessels. This decreases the work the heart has to do, thereby relieving symptoms of heart failure and pulmonary edema.
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?
- Initiate anticoagulation therapy.
- Order a 24-hour Holter monitor.
- Schedule for immediate electrical cardioversion.
- Perform carotid sinus massage.
Correct answer: Order a 24-hour Holter monitor.
Correct answer: Order a 24-hour Holter monitor. Explanation: In a patient with a history of atrial fibrillation presenting with syncope, a 24-hour Holter monitor is appropriate to assess for arrhythmic causes of syncope, such as periods of rapid atrial fibrillation or other arrhythmias.
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?
- Sodium nitroprusside
- Labetalol
- Nitroglycerin
- Furosemide
Correct answer: Labetalol
Correct answer: Labetalol. Explanation: Labetalol is a beta-blocker with alpha-blocking properties, making it effective for gently lowering blood pressure without causing a rapid decrease that could potentially reduce cerebral perfusion in the context of an acute ischemic stroke.
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?
- Decreased afterload
- Increased preload
- Left-to-right shunt
- Right-to-left shunt
Correct answer: Left-to-right shunt
Correct answer: Left-to-right shunt. Explanation: A ventricular septal defect post-myocardial infarction typically results in a left-to-right shunt due to the pressure gradient between the left and right ventricles. This increases the volume of blood the right side of the heart has to pump, leading to volume overload and signs of heart failure.
Which of the following conditions is associated with a high risk of developing cardiac tamponade following a myocardial infarction?
- Anterior wall MI
- Inferior wall MI
- Lateral wall MI
- Posterior wall MI
Correct answer: Anterior wall MI
Correct answer: Anterior wall MI. Explanation: Anterior wall myocardial infarction is associated with a higher risk of ventricular rupture leading to cardiac tamponade, due to the larger area of myocardium supplied by the left anterior descending artery, which is often involved in anterior wall MIs.
In a patient with acute pericarditis, which of the following ECG findings is most characteristic?
- ST-segment elevation in all leads
- Deep Q waves in leads II, III, and aVF
- ST-segment depression in leads V1-V4
- Prolonged PR interval
Correct answer: ST-segment elevation in all leads
Correct answer: ST-segment elevation in all leads. Explanation: ST-segment elevation in all leads is characteristic of acute pericarditis, reflecting diffuse inflammation of the pericardium. This finding differentiates pericarditis from localized ST elevation seen in myocardial infarction.
Which of the following is the preferred treatment for a patient presenting with symptomatic bradycardia with a heart rate of 40 bpm and hypotension?
- Administer atropine
- Immediate synchronized cardioversion
- Intravenous fluid bolus
- Transcutaneous pacing
Correct answer: Administer atropine
Correct answer: Administer atropine. Explanation: In symptomatic bradycardia, especially with hypotension, transcutaneous pacing is preferred to rapidly increase the heart rate and improve hemodynamic stability. Atropine is an initial measure but may not be effective in severe cases.
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?
- Elevated B-type natriuretic peptide (BNP)
- Elevated troponin I
- Electrical alternans on ECG
- Decreased serum lactate
Correct answer: Electrical alternans on ECG
Correct answer: Electrical alternans on ECG. Explanation: Electrical alternans, characterized by variations in the amplitude of QRS complexes on the ECG, is highly indicative of cardiac tamponade. This finding results from the swinging motion of the heart within a large pericardial effusion, which is a hallmark of tamponade physiology.
In a patient presenting with suspected Takotsubo cardiomyopathy, which of the following echocardiographic findings is most characteristic?
- Fixed obstruction of the left ventricular outflow tract
- Apical ballooning of the left ventricle
- Dilatation of the right ventricle
- Hypertrophy of the interventricular septum
Correct answer: Apical ballooning of the left ventricle
Correct answer: Apical ballooning of the left ventricle. Explanation: Takotsubo cardiomyopathy, also known as stress-induced cardiomyopathy, is characterized by transient apical ballooning of the left ventricle in the absence of obstructive coronary artery disease, typically triggered by emotional or physical stress.
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
- Intravenous calcium gluconate
- Intravenous insulin and dextrose
- Nebulized albuterol
Correct answer: Intravenous calcium gluconate
Correct answer: Intravenous calcium gluconate. Explanation: In the setting of severe hyperkalemia with ECG changes indicating potential cardiac toxicity, intravenous calcium gluconate is administered first to stabilize the myocardial cell membrane. This treatment does not lower potassium levels but protects the heart from the effects of hyperkalemia.
Which of the following is the most appropriate initial management for a patient with acute right ventricular infarction?
- Intravenous nitroglycerin
- Intravenous beta-blockers
- Aggressive fluid resuscitation
- Immediate reperfusion therapy
Correct answer: Aggressive fluid resuscitation
Correct answer: Aggressive fluid resuscitation. Explanation: Acute right ventricular infarction often results in hypotension due to decreased right ventricular output. Aggressive fluid resuscitation is critical to increase right ventricular preload and maintain adequate left ventricular filling and cardiac output.
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?
- Chest X-ray
- CT scan of the chest with contrast
- MRI of the chest
- D-dimer assay
Correct answer: CT scan of the chest with contrast
Correct answer: CT scan of the chest with contrast. Explanation: In patients with Marfan syndrome presenting with symptoms suggestive of aortic dissection, such as sudden severe chest pain radiating to the back, a CT scan of the chest with contrast is the most critical and rapid diagnostic tool to confirm the diagnosis of aortic dissection.
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?
- Ventricular septal rupture
- Right ventricular infarction
- Chronic heart failure
- Acute pericarditis
Correct answer: Ventricular septal rupture
Correct answer: Ventricular septal rupture. Explanation: Ventricular septal rupture is a catastrophic complication of large anterior wall myocardial infarctions, often occurring within the first week after the event. Early detection and management are crucial due to the high mortality associated with this complication.
Which of the following is the most effective therapeutic intervention to prevent stroke in patients with atrial fibrillation?
- Antiplatelet therapy
- Beta-blockers
- Anticoagulation therapy
- Calcium channel blockers
Correct answer: Anticoagulation therapy
Correct answer: Anticoagulation therapy. Explanation: Anticoagulation therapy is the most effective intervention to prevent thromboembolic stroke in patients with atrial fibrillation, as it targets the pathophysiological mechanism of stroke in these patients, which is the formation of clots in the left atrial appendage.
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 myocardial infarction
- Acute pericarditis
- Pulmonary embolism
- Dissecting aortic aneurysm
Correct answer: Acute pericarditis
Correct answer: Acute pericarditis. Explanation: The combination of chest pain, fever, a friction rub on auscultation, and diffuse ST elevation on ECG is characteristic of acute pericarditis, which involves inflammation of the pericardial sac.
In a patient with suspected tension pneumothorax, what is the most immediate course of action?
- Administer high-flow oxygen and prepare for chest tube placement
- Initiate broad-spectrum antibiotics
- Perform needle decompression at the second intercostal space, midclavicular line
- Provide nebulized bronchodilators
Correct answer: Perform needle decompression at the second intercostal space, midclavicular line
Correct answer: Perform needle decompression at the second intercostal space, midclavicular line. Explanation: For a patient with suspected tension pneumothorax, immediate needle decompression at the second intercostal space, midclavicular line, is necessary to relieve the pressure and prevent further deterioration of the patient's condition.
A patient with COPD presents with a sudden exacerbation of symptoms. What is the most effective initial treatment?
- Oral corticosteroids
- High-dose inhaled corticosteroids
- Systemic corticosteroids and bronchodilators
- Antibiotics
Correct answer: Systemic corticosteroids and bronchodilators
Correct answer: Systemic corticosteroids and bronchodilators. Explanation: The most effective initial treatment for a sudden exacerbation of COPD symptoms includes systemic corticosteroids to reduce inflammation and bronchodilators to open airways.
A patient arrives with suspected epiglottitis. Which of the following signs is a priority for establishing the diagnosis?
- Hoarseness and barking cough
- Drooling and difficulty swallowing
- Wheezing on auscultation
- Bilateral crackles
Correct answer: Drooling and difficulty swallowing
Correct answer: Drooling and difficulty swallowing. Explanation: Drooling and difficulty swallowing are priority signs of epiglottitis, indicating potential airway obstruction and the need for immediate intervention.
In the management of acute asthma exacerbation, which of the following medications is considered first-line therapy?
- Oral corticosteroids
- Intravenous antibiotics
- Short-acting beta-agonists (SABAs)
- Anticholinergics
Correct answer: Short-acting beta-agonists (SABAs)
Correct answer: Short-acting beta-agonists (SABAs). Explanation: Short-acting beta-agonists (SABAs) are considered first-line therapy for acute asthma exacerbation as they provide rapid relief of bronchospasm.
For a patient with a flail chest, which of the following is the most appropriate management strategy?
- Immediate intubation and mechanical ventilation
- Pain management and careful monitoring for respiratory distress
- Application of a chest binder
- Emergency thoracotomy
Correct answer: Pain management and careful monitoring for respiratory distress
Correct answer: Pain management and careful monitoring for respiratory distress. Explanation: For a patient with flail chest, pain management and careful monitoring for signs of respiratory distress are crucial to prevent further complications and ensure adequate ventilation.
In the case of a patient presenting with carbon monoxide poisoning, which of the following treatments is most effective?
- High-flow oxygen through a non-rebreather mask
- Hyperbaric oxygen therapy
- Intravenous fluids
- Oral activated charcoal
Correct answer: Hyperbaric oxygen therapy
Correct answer: Hyperbaric oxygen therapy. Explanation: Hyperbaric oxygen therapy is the most effective treatment for carbon monoxide poisoning as it helps to rapidly displace carbon monoxide from hemoglobin, restoring the oxygen-carrying capacity of the blood.
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?
- Tracheostomy infection
- Tracheal stenosis
- Tube occlusion
- Pneumothorax
Correct answer: Tube occlusion
Correct answer: Tube occlusion. Explanation: The primary concern is tube occlusion, which can lead to inadequate ventilation and respiratory distress. Immediate assessment and management are required to ensure the airway is clear.
For a patient experiencing an acute pulmonary edema, which of the following interventions should be prioritized?
- Upright positioning and oxygen therapy
- Immediate diuresis
- Broad-spectrum antibiotics
- High-dose corticosteroids
Correct answer: Upright positioning and oxygen therapy
Correct answer: Upright positioning and oxygen therapy. Explanation: Upright positioning and oxygen therapy are prioritized interventions for acute pulmonary edema to improve oxygenation and reduce the work of breathing.
In the evaluation of a patient with suspected foreign body aspiration, which of the following is the most diagnostic procedure?
- Chest X-ray
- CT scan of the chest
- Bronchoscopy
- Pulmonary function tests
Correct answer: Bronchoscopy
Correct answer: Bronchoscopy. Explanation: Bronchoscopy is the most diagnostic procedure for suspected foreign body aspiration as it allows for direct visualization and potential removal of the foreign body.
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?
- Asthma
- Pulmonary embolism
- Mesothelioma
- Chronic bronchitis
Correct answer: Mesothelioma
Correct answer: Mesothelioma. Explanation: Given the history of asbestos exposure and the symptoms along with pleural effusion on imaging, mesothelioma, a type of cancer associated with asbestos exposure, is the most likely diagnosis.
In a patient presenting with stridor, which of the following is the most urgent priority?
- Administering antipyretics
- Ensuring airway patency
- Administering antibiotics
- Prescribing corticosteroids
Correct answer: Ensuring airway patency
Correct answer: Ensuring airway patency. Explanation: Stridor is a sign of upper airway obstruction and ensuring airway patency is the most urgent priority to prevent life-threatening hypoxia.
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?
- High-dose vitamin C
- Systemic corticosteroids
- Nebulized hypertonic saline
- Antibiotic therapy
Correct answer: Systemic corticosteroids
Correct answer: Systemic corticosteroids. Explanation: Systemic corticosteroids have been shown to improve outcomes in patients with severe SARS-CoV-2 infection and respiratory failure by reducing inflammation in the lungs.
What is the most specific sign of a tension pneumothorax on chest X-ray?
- Mediastinal shift to the opposite side
- Presence of pleural effusion
- Hyperexpansion of the affected hemithorax
- Collapse of the ipsilateral lung
Correct answer: Mediastinal shift to the opposite side
Correct answer: Mediastinal shift to the opposite side. Explanation: The most specific sign of a tension pneumothorax on chest X-ray is a mediastinal shift to the opposite side, indicating significant pressure buildup that is displacing thoracic structures.
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?
- Long-term oxygen therapy
- High-dose corticosteroids
- Antifibrotic agents
- Immediate lung transplantation
Correct answer: High-dose corticosteroids
Correct answer: High-dose corticosteroids. Explanation: In the acute exacerbation of idiopathic pulmonary fibrosis, high-dose corticosteroids are considered the most appropriate initial treatment to reduce inflammation and fibrosis progression.
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?
- Atelectasis
- Pulmonary embolism
- Fat embolism syndrome
- Acute respiratory distress syndrome (ARDS)
Correct answer: Fat embolism syndrome
Correct answer: Fat embolism syndrome. Explanation: Fat embolism syndrome is characterized by the sudden onset of symptoms such as central chest pain, dyspnea, and a rapid drop in blood oxygen saturation, typically occurring within 72 hours after a surgical procedure or trauma. It results from fat globules entering the bloodstream and causing pulmonary and systemic symptoms.
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?
- Bronchial carcinoma
- Pneumonia
- Tuberculosis
- Pulmonary embolism
Correct answer: Pulmonary embolism
Correct answer: Pulmonary embolism. Explanation: The sudden onset of unilateral pleuritic chest pain, dyspnea, and hemoptysis in a patient with a history of smoking is most indicative of a pulmonary embolism, a condition where a clot blocks blood flow to the lungs.
In a patient suspected of having a pneumothorax, which ultrasound finding is most indicative of the condition?
- B-lines
- Consolidation
- Absence of lung sliding
- Pleural effusion
Correct answer: Absence of lung sliding
Correct answer: Absence of lung sliding. Explanation: The absence of lung sliding on ultrasound is most indicative of a pneumothorax, suggesting that the pleural layers are not moving together because air is present in the pleural space.
A patient presents with acute respiratory distress following a severe allergic reaction. Which of the following interventions is most critical?
- Oral antihistamines
- Intramuscular epinephrine
- Corticosteroids
- Nebulized bronchodilators
Correct answer: Intramuscular epinephrine
Correct answer: Intramuscular epinephrine. Explanation: In the case of acute respiratory distress following a severe allergic reaction, intramuscular epinephrine is the most critical intervention to rapidly reverse airway swelling and improve breathing.
For a patient with acute respiratory distress and a known history of sarcoidosis, which of the following is the most appropriate management strategy?
- Immediate administration of antitubercular therapy
- High-flow oxygen and corticosteroid therapy
- Empirical antibiotics and nebulized bronchodilators
- Therapeutic thoracentesis
Correct answer: High-flow oxygen and corticosteroid therapy
Correct answer: High-flow oxygen and corticosteroid therapy. Explanation: For a patient with acute respiratory distress and a history of sarcoidosis, high-flow oxygen to support breathing and corticosteroid therapy to reduce inflammation are the most appropriate management strategies.
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?
- Immediate administration of oral antihypertensive medication
- Administration of IV rtPA if within the window period and no contraindications
- Wait for spontaneous blood pressure reduction before any intervention
- Immediate lowering of blood pressure using IV medication to a target of <120/80 mmHg
Correct answer: Administration of IV rtPA if within the window period and no contraindications
Correct answer: Administration of IV rtPA if within the window period and no contraindications. Explanation: In the setting of an ischemic stroke with no evidence of hemorrhage on CT and presentation within the therapeutic window period for rtPA (usually within 4.5 hours from onset of symptoms), the administration of intravenous recombinant tissue plasminogen activator (rtPA) is indicated unless contraindicated. Aggressive blood pressure management is required if systolic blood pressure is >185 mmHg or diastolic blood pressure is >110 mmHg, but immediate excessive lowering to <120/80 mmHg is not recommended due to the risk of worsening cerebral ischemia.
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?
- Opioid overdose
- Traumatic brain injury
- Pontine hemorrhage
- Thalamic stroke
Correct answer: Pontine hemorrhage
Correct answer: Pontine hemorrhage. Explanation: The combination of a low Glasgow Coma Scale score (indicating severe brain impairment), pinpoint pupils (suggesting brainstem involvement), and decerebrate posturing (indicating severe brain damage, typically at the level of the brainstem or below) most strongly suggests a pontine hemorrhage. This area of the brain controls vital functions, and hemorrhage here can cause these specific symptoms.
In a patient with suspected bacterial meningitis, which of the following findings in cerebrospinal fluid (CSF) analysis is most indicative of the condition?
- Decreased glucose, increased protein, increased white blood cells with a predominance of lymphocytes
- Increased glucose, decreased protein, increased white blood cells with a predominance of neutrophils
- Decreased glucose, increased protein, increased white blood cells with a predominance of neutrophils
- Increased glucose, increased protein, decreased white blood cells
Correct answer: Decreased glucose, increased protein, increased white blood cells with a predominance of neutrophils
Correct answer: Decreased glucose, increased protein, increased white blood cells with a predominance of neutrophils. Explanation: Bacterial meningitis is typically characterized by a CSF profile of decreased glucose (due to consumption by bacteria), increased protein (due to the inflammatory response), and increased white blood cells with a predominance of neutrophils (indicative of an acute bacterial infection).
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?
- Lumbar puncture
- Immediate CT scan of the head
- MRI of the brain
- CT angiography of the head
Correct answer: Immediate CT scan of the head
Correct answer: Immediate CT scan of the head. Explanation: An immediate CT scan of the head is the most appropriate initial diagnostic test for a patient presenting with symptoms suggestive of a subarachnoid hemorrhage (SAH), such as a sudden, severe headache, photophobia, and neck stiffness, without focal neurological deficits. The CT scan can rapidly detect bleeding in the subarachnoid space. Lumbar puncture is a subsequent step if the CT scan is negative but suspicion for SAH remains high.
In the context of traumatic brain injury (TBI), which intracranial pressure (ICP) reading necessitates immediate intervention to prevent secondary brain injury?
- >10 mmHg
- >15 mmHg
- >20 mmHg
- >25 mmHg
Correct answer: >20 mmHg
Correct answer: >20 mmHg. Explanation: In the context of traumatic brain injury, an intracranial pressure (ICP) greater than 20 mmHg necessitates immediate intervention to prevent secondary brain injury. Prolonged elevated ICP can lead to decreased cerebral perfusion pressure and ischemia, worsening the neurological outcome. Management strategies may include medical and surgical options to reduce ICP.
Which of the following is the most common cause of spontaneous intracerebral hemorrhage (ICH)?
- Amyloid angiopathy
- Arteriovenous malformation (AVM)
- Hypertension
- Use of anticoagulant medication
Correct answer: Hypertension
Correct answer: Hypertension. Explanation: Hypertension is the most common cause of spontaneous intracerebral hemorrhage (ICH). Chronic hypertension leads to changes in the small blood vessels in the brain, making them more likely to rupture. While other factors, such as amyloid angiopathy, arteriovenous malformations, and the use of anticoagulant medication, can also cause ICH, hypertension remains the predominant cause.
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?
- Oral phenytoin
- IV lorazepam
- Oral carbamazepine
- IV phenobarbital
Correct answer: IV lorazepam
Correct answer: IV lorazepam. Explanation: IV lorazepam is considered the first-line treatment for status epilepticus, a life-threatening condition where a seizure lasts longer than 5 minutes or when seizures occur close together without recovery in between. Lorazepam acts quickly to stop seizures by enhancing the effects of GABA, a neurotransmitter that inhibits nerve transmission in the brain.
Which of the following is the most specific sign of meningitis in adults?
- Photophobia
- Nuchal rigidity
- Vomiting
- Brudzinski's sign
Correct answer: Nuchal rigidity
Correct answer: Nuchal rigidity. Explanation: Nuchal rigidity, or stiffness of the neck, is the most specific sign of meningitis in adults. It indicates irritation of the meninges, the protective coverings of the brain and spinal cord. While other symptoms like photophobia, vomiting, and Brudzinski's sign can be present in meningitis, nuchal rigidity is more specifically indicative of this condition.
In a patient with an acute ischemic stroke, which of the following findings would contraindicate the use of intravenous thrombolytic therapy?
- Blood glucose of 120 mg/dL
- A history of migraine
- Blood pressure of 180/110 mmHg on presentation
- Recent major surgery within the past 14 days
Correct answer: Recent major surgery within the past 14 days
Correct answer: Recent major surgery within the past 14 days. Explanation: Recent major surgery within the past 14 days is a contraindication to the use of intravenous thrombolytic therapy in a patient with an acute ischemic stroke due to the increased risk of bleeding. While elevated blood pressure must be managed before administration of thrombolytics, it is not an absolute contraindication if it can be controlled. A history of migraine and a blood glucose level of 120 mg/dL are not contraindications to thrombolytic therapy.
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?
- Paraplegia
- Left-sided hemiplegia
- Right-sided hemiplegia
- Quadriplegia
Correct answer: Right-sided hemiplegia
Correct answer: Right-sided hemiplegia. Explanation: In a stroke affecting the left middle cerebral artery, the patient would most likely exhibit right-sided hemiplegia. The brain's left hemisphere controls the right side of the body, and the middle cerebral artery supplies blood to areas of the brain that control motor function among other functions. Aphasia, or difficulty with language, is also consistent with left hemisphere involvement in those who are right-handed or have left hemisphere dominance for language.
For a patient suspected of having a basilar artery occlusion, which of the following symptoms would you most likely observe?
- Hemiparesis
- Isolated visual disturbances
- Quadriplegia and cranial nerve abnormalities
- Sensory loss in one limb
Correct answer: Quadriplegia and cranial nerve abnormalities
Correct answer: Quadriplegia and cranial nerve abnormalities. Explanation: Basilar artery occlusion can lead to brainstem stroke, resulting in quadriplegia (paralysis of all four limbs) due to the interruption of motor pathways in the brainstem, and cranial nerve abnormalities due to the basilar artery's supply to the brainstem where many cranial nerves originate. This condition is a neurological emergency requiring immediate intervention.
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?
- Left cerebral hemisphere
- Right cerebral hemisphere
- Left cerebellum
- Right cerebellum
Correct answer: Right cerebellum
Correct answer: Right cerebellum. Explanation: The presentation of acute vertigo, dysarthria (difficulty speaking), diplopia (double vision), and ataxia (lack of muscle coordination) on the right side strongly suggests a lesion in the right cerebellum. The cerebellum is responsible for coordination of voluntary movements, balance, and speech. Lesions in the cerebellum lead to symptoms on the same side of the body (ipsilateral).
In a patient with a suspected acute subdural hematoma, which of the following findings would you expect on a head CT scan?
- Biconvex hyperdense area
- Crescent-shaped hyperdense area
- Diffuse swelling with no clear lesion
- Midline shift without a hyperdense area
Correct answer: Crescent-shaped hyperdense area
Correct answer: Crescent-shaped hyperdense area. Explanation: An acute subdural hematoma typically appears on a head CT scan as a crescent-shaped hyperdense (bright) area. This appearance is due to blood collecting between the dura mater and the arachnoid mater of the brain. The crescent shape conforms to the brain's surface and does not cross suture lines.
Which of the following medications is most appropriate for the acute treatment of a headache in a patient with a known arteriovenous malformation (AVM)?
- Sumatriptan
- Acetaminophen
- Ergotamine
- Ibuprofen
Correct answer: Acetaminophen
Correct answer: Acetaminophen. Explanation: In patients with a known arteriovenous malformation (AVM), it is advisable to use non-vasoactive analgesics for headache management to avoid increasing the risk of bleeding or affecting the AVM. Acetaminophen is the safest option among the listed medications as it provides pain relief without the vasoactive effects associated with sumatriptan or ergotamine, and with less risk of gastrointestinal bleeding compared to ibuprofen.
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?
- Viral encephalitis
- Bacterial meningitis
- Neisseria meningitidis infection
- Herpes simplex virus (HSV) infection
Correct answer: Neisseria meningitidis infection
Correct answer: Neisseria meningitidis infection. Explanation: The presentation of acute confusion, fever, headache, and a petechial rash is highly suggestive of a Neisseria meningitidis infection, which can lead to meningococcal meningitis. This bacterial infection is characterized by the sudden onset of fever, headache, and neck stiffness, often accompanied by a distinctive petechial rash that does not blanch under pressure.
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?
- Hyperventilation to a PaCO2 of 25 mmHg
- Administration of mannitol
- Elevation of the head of the bed to 30 degrees
- Use of prophylactic hypothermia
Correct answer: Use of prophylactic hypothermia
Correct answer: Use of prophylactic hypothermia. Explanation: While hypothermia has been studied for its potential neuroprotective effects in traumatic brain injury (TBI), the use of prophylactic hypothermia is not currently recommended as a standard intervention for elevated intracranial pressure. Hyperventilation, mannitol administration, and elevating the head of the bed are established methods for reducing ICP. Prophylactic hypothermia's benefits and risks are still under investigation, and it is not universally accepted as a standard treatment for controlling ICP.
For a patient presenting with Bell's palsy, which of the following treatments is most effective if started within 72 hours of symptom onset?
- High-dose antiviral therapy
- High-dose corticosteroids
- Surgical decompression
- Physiotherapy
Correct answer: High-dose corticosteroids
Correct answer: High-dose corticosteroids. Explanation: For patients presenting with Bell's palsy, high-dose corticosteroids, if started within 72 hours of symptom onset, have been shown to improve outcomes. Corticosteroids can reduce inflammation and swelling of the facial nerve, potentially decreasing nerve damage and improving the chances of a full recovery. Antiviral therapy may be considered in certain cases, but corticosteroids are the primary treatment. Surgical decompression and physiotherapy are not first-line treatments.
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?
- Age 75 years
- Prior ischemic stroke six months ago
- Blood pressure of 170/95 mmHg
- Current use of direct oral anticoagulants (DOACs)
Correct answer: Current use of direct oral anticoagulants (DOACs)
Correct answer: Current use of direct oral anticoagulants (DOACs). Explanation: The current use of direct oral anticoagulants (DOACs) is a contraindication for the administration of intravenous recombinant tissue plasminogen activator (rtPA) due to the increased risk of bleeding. Age, prior stroke more than three months ago, and controlled blood pressure (even if initially elevated, it can be treated and reduced before rtPA administration) are not contraindications. However, anticoagulant use without a therapeutic INR level for those on warfarin or evidence of anticoagulation from DOACs requires careful consideration.
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?
- Miosis
- Mydriasis
- Anisocoria
- Consensual light reflex absence
Correct answer: Anisocoria
Correct answer: Anisocoria. Explanation: Anisocoria, or unequal pupil sizes, is a critical sign that may indicate increased intracranial pressure (ICP) following a head injury, particularly if associated with a decrease in consciousness or a focal neurological deficit. This condition can suggest herniation or pressure affecting the oculomotor nerve (cranial nerve III), leading to an abnormal pupil response. While mydriasis (dilated pupils), miosis (constricted pupils), and absence of the consensual light reflex may also be observed in various neurological conditions, anisocoria is more directly associated with changes in ICP.
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?
- Ovarian torsion
- Ectopic pregnancy
- Appendicitis
- Pelvic inflammatory disease
Correct answer: Ectopic pregnancy
Correct answer: Ectopic pregnancy. Explanation: The presentation of sudden-onset right lower quadrant pain in a female patient with a positive pregnancy test most strongly suggests an ectopic pregnancy. Ectopic pregnancies occur when a fertilized egg implants outside the uterine cavity, often in a fallopian tube, which can lead to life-threatening complications if not treated promptly.
Which of the following is the most appropriate first-line treatment for a patient diagnosed with testicular torsion?
- Immediate surgical exploration
- Antibiotics
- Application of a cold pack
- Manual detorsion
Correct answer: Immediate surgical exploration
Correct answer: Immediate surgical exploration. Explanation: Immediate surgical exploration is the most appropriate first-line treatment for testicular torsion. Time is critical to salvage the testis, and surgery is necessary to untwist the spermatic cord and secure the testis to prevent recurrence.
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?
- Complete blood count
- Transvaginal ultrasound
- Urinalysis
- Abdominal X-ray
Correct answer: Transvaginal ultrasound
Correct answer: Transvaginal ultrasound. Explanation: Transvaginal ultrasound is the most important initial diagnostic test for a patient presenting with the symptoms described. It helps in diagnosing conditions such as ectopic pregnancy, ovarian cysts, or other gynecological emergencies, which are likely given the patient's symptoms and history.
In pregnant patients, which of the following conditions is most likely to mimic the symptoms of acute appendicitis?
- Preeclampsia
- Gastroenteritis
- Round ligament pain
- Cholecystitis
Correct answer: Cholecystitis
Correct answer: Cholecystitis. Explanation: Cholecystitis, or inflammation of the gallbladder, can mimic the symptoms of acute appendicitis in pregnant patients due to the similar presentation of right upper quadrant or epigastric pain, nausea, and vomiting. The physiological changes during pregnancy can make the diagnosis challenging.
A patient presents with flank pain, hematuria, and nausea. The pain radiates to the groin. Which of the following is the most likely diagnosis?
- Pyelonephritis
- Renal cell carcinoma
- Urolithiasis (kidney stones)
- Acute cystitis
Correct answer: Urolithiasis (kidney stones)
Correct answer: Urolithiasis (kidney stones). Explanation: The classic presentation of flank pain that radiates to the groin, accompanied by hematuria and nausea, is indicative of urolithiasis, or kidney stones. This condition is caused by the formation of stones in the kidney, leading to obstruction and pain.
Which of the following is the primary concern in the management of a patient with a ruptured ectopic pregnancy?
- Hypertension
- Infection
- Hemorrhagic shock
- Urinary retention
Correct answer: Hemorrhagic shock
Correct answer: Hemorrhagic shock. Explanation: The primary concern in the management of a patient with a ruptured ectopic pregnancy is hemorrhagic shock. A ruptured ectopic pregnancy can lead to significant intra-abdominal bleeding, requiring immediate intervention to stabilize the patient and control the hemorrhage.
A patient presents with severe abdominal pain, rebound tenderness, and guarding. Which of the following diagnostic tests is most appropriate to evaluate for peritonitis?
- Abdominal ultrasound
- CT scan of the abdomen
- MRI of the abdomen
- X-ray of the abdomen
Correct answer: CT scan of the abdomen
Correct answer: CT scan of the abdomen. Explanation: A CT scan of the abdomen is the most appropriate diagnostic test to evaluate for peritonitis, as it can provide detailed images of the abdominal organs, helping to identify the presence of inflammation, perforation, or other causes of peritonitis.
In the management of ovarian torsion, which of the following is the most definitive treatment?
- NSAIDs for pain management
- Hormonal therapy
- Surgical detorsion
- Observation and bed rest
Correct answer: Surgical detorsion
Correct answer: Surgical detorsion. Explanation: Surgical detorsion is the most definitive treatment for ovarian torsion. It involves the surgical untwisting of the ovary to restore blood flow and prevent necrosis. This procedure is time-sensitive to preserve ovarian function.
Which of the following is a critical consideration in the emergency management of placental abruption?
- Immediate delivery of the fetus
- Administering antibiotics
- Fluid resuscitation
- Blood glucose monitoring
Correct answer: Immediate delivery of the fetus
Correct answer: Immediate delivery of the fetus. Explanation: Immediate delivery of the fetus is a critical consideration in the emergency management of placental abruption, especially in severe cases or when fetal distress is evident. Placental abruption can compromise fetal oxygenation, making expedited delivery essential to minimize maternal and fetal morbidity and mortality.
For a patient with acute urinary retention, which of the following is the initial management step?
- Oral antibiotics
- Bladder catheterization
- Intravenous fluids
- NSAIDs for pain relief
Correct answer: Bladder catheterization
Correct answer: Bladder catheterization. Explanation: Bladder catheterization is the initial management step for acute urinary retention. It provides immediate relief from the retention, helps to prevent bladder injury, and allows for the assessment of the volume of retained urine.
In a patient presenting with pelvic inflammatory disease 'PID', which of the following symptoms most strongly suggests the presence of a tubo-ovarian abscess?
- Lower abdominal pain
- Vaginal discharge
- Fever and chills
- Nausea and vomiting
Correct answer: Fever and chills
Correct answer: Fever and chills. Explanation: Fever and chills in a patient with pelvic inflammatory disease 'PID' most strongly suggest the presence of a tubo-ovarian abscess. While lower abdominal pain and vaginal discharge are common symptoms of PID, the presence of fever and chills indicates a more severe infection that may have led to the formation of an abscess.
Which of the following is the most appropriate first-line treatment for a pregnant patient with symptomatic cholelithiasis?
- Laparoscopic cholecystectomy
- Oral ursodeoxycholic acid
- High-dose antibiotics
- Intravenous fluids and pain management
Correct answer: Intravenous fluids and pain management
Correct answer: Intravenous fluids and pain management. Explanation: For a pregnant patient with symptomatic cholelithiasis, the most appropriate first-line treatment is conservative management with intravenous fluids and pain management. This approach aims to alleviate symptoms while minimizing risks to the fetus. Surgical intervention may be considered in non-responsive or complicated cases.
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?
- KUB (Kidney-Ureter-Bladder) X-ray
- MRI of the abdomen
- Non-contrast CT scan of the abdomen and pelvis
- Ultrasound of the abdomen
Correct answer: Non-contrast CT scan of the abdomen and pelvis
Correct answer: Non-contrast CT scan of the abdomen and pelvis. Explanation: A non-contrast CT scan of the abdomen and pelvis is the most appropriate imaging study to confirm the diagnosis of urolithiasis (kidney stones), as it can accurately detect the presence, size, and location of stones within the urinary tract.
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?
- Cervical motion tenderness
- Adnexal mass
- Unilateral tenderness and fullness in the adnexa
- Bulging anterior vaginal wall
Correct answer: Unilateral tenderness and fullness in the adnexa
Correct answer: Unilateral tenderness and fullness in the adnexa. Explanation: Unilateral tenderness and fullness in the adnexa on a pelvic exam is most indicative of a ruptured ovarian cyst. This finding suggests the presence of a cyst and associated inflammation or hemorrhage into the adnexal area, consistent with a rupture.
In the setting of acute pyelonephritis, which of the following laboratory findings is most indicative of a complicated infection requiring admission?
- Elevated white blood cell count
- Presence of nitrites in the urine
- Elevated serum creatinine
- Positive urine culture
Correct answer: Elevated serum creatinine
Correct answer: Elevated serum creatinine. Explanation: Elevated serum creatinine in the setting of acute pyelonephritis is most indicative of a complicated infection, suggesting renal impairment. This finding warrants hospital admission for intravenous antibiotics and further evaluation.
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?
- Uterine rupture
- Placenta previa
- Placental abruption
- Vasa previa
Correct answer: Placental abruption
Correct answer: Placental abruption. Explanation: The presentation of sudden onset severe abdominal pain, vaginal bleeding, uterine tenderness, and fetal distress in the form of recurrent late decelerations is most indicative of placental abruption. This condition involves the premature separation of the placenta from the uterine wall, which can compromise fetal oxygenation and requires immediate obstetric care.
Which of the following is the initial most appropriate management for a patient with a suspected ectopic pregnancy and hemodynamic instability?
- Intramuscular methotrexate
- Laparoscopic salpingostomy
- Immediate fluid resuscitation and blood transfusion
- Transvaginal ultrasound
Correct answer: Immediate fluid resuscitation and blood transfusion
Correct answer: Immediate fluid resuscitation and blood transfusion. Explanation: For a patient with suspected ectopic pregnancy and hemodynamic instability, immediate fluid resuscitation and blood transfusion are the most appropriate initial management steps to stabilize the patient before further diagnostic or surgical interventions.
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?
- Appendicitis
- Tubo-ovarian abscess
- Ectopic pregnancy
- Ovarian torsion
Correct answer: Tubo-ovarian abscess
Correct answer: Tubo-ovarian abscess. Explanation: The presence of fever, lower abdominal pain, and a tender, palpable mass on the right side of the pelvis most likely indicates a tubo-ovarian abscess. This condition is a complication of pelvic inflammatory disease and requires prompt antibiotic treatment and often surgical intervention.
Which of the following is the most significant risk factor for ectopic pregnancy?
- Previous cesarean section
- Use of intrauterine device 'IUD'
- History of sexually transmitted infections (STIs)
- Nulliparity
Correct answer: History of sexually transmitted infections (STIs)
Correct answer: History of sexually transmitted infections (STIs). Explanation: A history of sexually transmitted infections (STIs) is the most significant risk factor for ectopic pregnancy. STIs can lead to pelvic inflammatory disease, which can cause scarring and damage to the fallopian tubes, increasing the risk of an ectopic pregnancy.
In a patient with acute renal colic due to urolithiasis, which of the following medications is most effective for pain management?
- Acetaminophen
- Oral morphine
- Intravenous ketorolac
- Intramuscular diclofenac
Correct answer: Intravenous ketorolac
Correct answer: Intravenous ketorolac. Explanation: Intravenous ketorolac, a nonsteroidal anti-inflammatory drug 'NSAID', is most effective for managing the pain associated with acute renal colic due to its potent analgesic and anti-inflammatory properties. NSAIDs are preferred over opioids for the initial management of renal colic pain.
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?
- Cannabis
- Cocaine
- Alcohol
- Opioids
Correct answer: Cocaine
Correct answer: Cocaine. Explanation: The symptoms of acute agitation, dilated pupils, tachycardia, and hallucinations are indicative of stimulant intoxication, particularly cocaine or amphetamines. Cocaine causes sympathetic nervous system activation, resulting in the symptoms described.
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?
- Acute myocardial infarction
- Aortic dissection
- Pulmonary embolism
- Gastroesophageal reflux disease
Correct answer: Aortic dissection
Correct answer: Aortic dissection. Explanation: Patients with Marfan syndrome are at a higher risk for aortic dissection due to the connective tissue disorder affecting the aorta's structural integrity. Sudden-onset severe chest pain radiating to the back is a classic presentation of aortic dissection.
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?
- "Do you have a plan for suicide?"
- "How long have you felt depressed?"
- "Are you taking your medications as prescribed?"
- "Do you have a support system?"
Correct answer: "Do you have a plan for suicide?"
Correct answer: "Do you have a plan for suicide?". Explanation: Asking about a suicide plan is critical in assessing the risk of suicide in patients with depression. The specificity and lethality of the plan can indicate the immediacy of the risk for suicide.
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?
- Lorazepam
- Haloperidol
- Fluoxetine
- Lithium
Correct answer: Haloperidol
Correct answer: Haloperidol. Explanation: Haloperidol is a first-generation antipsychotic that is often used for rapid tranquilization in patients with severe agitation and aggression, particularly in the context of schizophrenia or acute psychotic episodes.
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 nervosa
- Bulimia nervosa
- Binge eating disorder
- Pica
Correct answer: Bulimia nervosa
Correct answer: Bulimia nervosa. Explanation: Bulimia nervosa, characterized by episodes of binge eating followed by compensatory behaviors such as vomiting, can lead to hypokalemia and metabolic alkalosis due to the loss of gastric contents.
A patient presents with symptoms of severe abdominal pain, vomiting, constipation, and psychiatric disturbances. Which of the following conditions should the emergency nurse suspect?
- Acute pancreatitis
- Irritable bowel syndrome
- Acute intermittent porphyria
- Appendicitis
Correct answer: Acute intermittent porphyria
Correct answer: Acute intermittent porphyria. Explanation: Acute intermittent porphyria is a metabolic disorder characterized by a deficiency in the heme synthesis pathway, leading to symptoms of severe abdominal pain, vomiting, constipation, and psychiatric disturbances.
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
- Sumatriptan
- Intravenous fluids
- Acetaminophen
Correct answer: Sumatriptan
Correct answer: Sumatriptan. Explanation: Sumatriptan is a selective serotonin receptor agonist that is effective in the acute treatment of migraines, which are characterized by unilateral, pulsating headaches that worsen with physical activity, nausea, and photophobia.
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?
- Provide reassurance and a quiet environment
- Initiate involuntary psychiatric hold
- Offer oral antipsychotic medication
- Schedule an immediate psychiatric evaluation
Correct answer: Initiate involuntary psychiatric hold
Correct answer: Initiate involuntary psychiatric hold. Explanation: In cases where a patient is experiencing acute psychosis and reports hearing voices that instruct harm to others, initiating an involuntary psychiatric hold is crucial for the safety of the patient and others, allowing for further evaluation and treatment under controlled conditions.
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?
- Immediate electrical cardioversion
- Administration of adenosine
- High-flow oxygen therapy
- Intravenous beta-blockers
Correct answer: Administration of adenosine
Correct answer: Administration of adenosine. Explanation: Adenosine is the drug of choice for the initial management of stable narrow complex tachycardias (such as SVT), as it can rapidly terminate the arrhythmia by slowing conduction through the AV node.
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 therapy
- Intravenous isotonic saline
- Blood transfusion
- Intravenous dextrose solution
Correct answer: Intravenous isotonic saline
Correct answer: Intravenous isotonic saline. Explanation: The symptoms suggest severe dehydration, for which the most appropriate initial treatment is intravenous isotonic saline to quickly restore circulatory volume and correct electrolyte imbalances.
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
- Migraine
- Meningitis
- Encephalitis
Correct answer: Meningitis
Correct answer: Meningitis. Explanation: The combination of high fever, headache, stiff neck, and photophobia is highly suggestive of meningitis, an inflammation of the protective membranes covering the brain and spinal cord, necessitating immediate medical intervention.
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?
- Sertraline
- Lithium
- Lorazepam
- Haloperidol
Correct answer: Lithium
Correct answer: Lithium. Explanation: Lithium is a mood stabilizer that is particularly effective in the treatment of mania in bipolar disorder, helping to control symptoms such as grandiosity, elevated mood, and hyperactivity.
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?
- Vitamin A
- Vitamin B1 (Thiamine)
- Vitamin C
- Vitamin D
Correct answer: Vitamin B1 (Thiamine)
Correct answer: Vitamin B1 (Thiamine). Explanation: The combination of confusion, ataxia, and ophthalmoplegia suggests Wernicke's encephalopathy, a condition caused by thiamine (Vitamin B1) deficiency, typically seen in alcohol use disorder.
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
- Immediate electrical cardioversion
- Oral beta-blockers
- Intravenous amiodarone
Correct answer: Immediate electrical cardioversion
Correct answer: Immediate electrical cardioversion. Explanation: In the case of hemodynamically unstable wide complex tachycardia, immediate electrical cardioversion is the treatment of choice to restore normal rhythm and prevent further cardiac complications.
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?
- Oral ACE inhibitors
- Intravenous diuretics
- Subcutaneous insulin
- Oral digoxin
Correct answer: Intravenous diuretics
Correct answer: Intravenous diuretics. Explanation: In a patient with heart failure presenting with acute exacerbation symptoms such as dyspnea, orthopnea, and edema, intravenous diuretics are the first-line treatment to reduce fluid overload and relieve symptoms.
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?
- Acute pancreatitis
- Bowel obstruction
- Perforated peptic ulcer
- Cholecystitis
Correct answer: Perforated peptic ulcer
Correct answer: Perforated peptic ulcer. Explanation: Air under the diaphragm on X-ray is indicative of free intraperitoneal air, most commonly due to a perforated peptic ulcer, leading to severe abdominal pain and the need for urgent surgical intervention.
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?
- Bronchitis
- Tuberculosis
- Pneumonia
- Lung cancer
Correct answer: Tuberculosis
Correct answer: Tuberculosis. Explanation: The combination of fever, night sweats, weight loss, and hemoptysis (bloody sputum) in a patient with a history of intravenous drug use strongly suggests tuberculosis, a highly infectious disease requiring immediate isolation and treatment.
An emergency nurse is assessing a patient with suspected carbon monoxide poisoning. Which of the following is the most appropriate diagnostic test?
- Arterial blood gas
- Complete blood count
- Carboxyhemoglobin level
- Chest X-ray
Correct answer: Carboxyhemoglobin level
Correct answer: Carboxyhemoglobin level. Explanation: The most appropriate diagnostic test for carbon monoxide poisoning is measuring the carboxyhemoglobin level, which will be elevated in cases of exposure. This test specifically identifies the presence of carbon monoxide bound to hemoglobin.
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?
- Lyme disease
- Rocky Mountain spotted fever
- Meningococcemia
- Ehrlichiosis
Correct answer: Rocky Mountain spotted fever
Correct answer: Rocky Mountain spotted fever. Explanation: Rocky Mountain spotted fever, caused by Rickettsia rickettsii, typically presents with a high fever, severe headache, and a characteristic petechial rash that starts on the extremities and spreads to the trunk, requiring prompt treatment with doxycycline.
A patient presents with acute onset of flank pain, hematuria, and nausea. The emergency nurse should suspect which of the following conditions?
- Pyelonephritis
- Renal calculus (kidney stone)
- Bladder infection
- Acute appendicitis
Correct answer: Renal calculus (kidney stone)
Correct answer: Renal calculus (kidney stone). Explanation: The presentation of acute onset flank pain, hematuria (blood in the urine), and nausea is highly suggestive of a renal calculus (kidney stone), causing pain as it passes through the urinary tract.
In the management of a patient with a suspected orbital blowout fracture, which of the following actions is most appropriate?
- Immediate pressure patching of both eyes
- Administration of systemic corticosteroids
- Encouraging the patient to blow their nose to clear blood clots
- Avoidance of nose blowing and sneezing
Correct answer: Avoidance of nose blowing and sneezing
Correct answer: Avoidance of nose blowing and sneezing. Explanation: Avoidance of nose blowing and sneezing is recommended to prevent further increase in orbital pressure, which can exacerbate the injury. Blowing the nose can force air into the orbit through the fractured bones, potentially worsening the injury and leading to complications such as orbital emphysema.
When evaluating a patient with a chemical eye injury, what is the initial step in management?
- Administering topical anesthetic drops
- Immediate irrigation with a neutralizing solution
- Assessment of visual acuity
- Copious irrigation with normal saline or water
Correct answer: Copious irrigation with normal saline or water
Correct answer: Copious irrigation with normal saline or water. Explanation: The initial step in managing a chemical eye injury is copious irrigation with normal saline or water to dilute and remove the chemical substance. This action helps to reduce the extent of the injury by flushing out the chemical agent, thereby decreasing the potential for serious harm to the eye.
Which of the following is the most appropriate management for a patient with a suspected compartment syndrome in the lower leg?
- Tight circumferential bandaging to reduce swelling
- Elevation of the limb above heart level
- Application of cold packs to the affected area
- Fasciotomy
Correct answer: Fasciotomy
Correct answer: Fasciotomy. Explanation: Fasciotomy is the definitive treatment for compartment syndrome, which is a condition where increased pressure within a muscle compartment compromises circulation and nerve function. This surgical procedure involves cutting the fascia to relieve pressure, restoring normal blood flow and preventing permanent damage to the muscles and nerves.
In patients with facial fractures, what is the primary reason for ensuring patency of the airway?
- Prevention of aspiration pneumonia
- Reduction of facial swelling
- Prevention of obstructive sleep apnea
- Mitigation of the risk of airway obstruction
Correct answer: Mitigation of the risk of airway obstruction
Correct answer: Mitigation of the risk of airway obstruction. Explanation: Ensuring patency of the airway is critical in patients with facial fractures to mitigate the risk of airway obstruction, which can occur due to swelling, bleeding, or the displacement of facial structures. Maintaining a clear airway is essential for preventing hypoxia and ensuring adequate ventilation.
What is the most appropriate management for a patient presenting with an open fracture of the tibia?
- Immediate application of a tight tourniquet above the injury
- Administration of intravenous antibiotics and tetanus prophylaxis
- Reduction of the fracture in the emergency department
- Application of heat to promote circulation
Correct answer: Administration of intravenous antibiotics and tetanus prophylaxis
Correct answer: Administration of intravenous antibiotics and tetanus prophylaxis. Explanation: The management of an open fracture includes the administration of intravenous antibiotics to prevent infection and tetanus prophylaxis if indicated. This approach addresses the high risk of infection associated with open fractures and is a critical aspect of the initial treatment.
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 appearance post-repair
- Development of a flexor tendon injury
- Infection leading to a "fight bite" scenario
- Loss of joint mobility
Correct answer: Infection leading to a "fight bite" scenario
Correct answer: Infection leading to a "fight bite" scenario. Explanation: Lacerations over a joint, especially in the context of a "fight bite," pose a significant risk for infection, including potentially serious infections like septic arthritis or osteomyelitis. The concern is that the laceration may have penetrated the joint capsule or tendon sheath, introducing bacteria deep into the wound.
What is the primary reason for immobilizing the spine in a patient with multiple trauma and suspected spinal injury?
- To alleviate pain
- To facilitate transportation
- To prevent secondary injury to the spinal cord
- To ensure early mobilization
Correct answer: To prevent secondary injury to the spinal cord
Correct answer: To prevent secondary injury to the spinal cord. Explanation: The primary reason for immobilizing the spine in the context of suspected spinal injury is to prevent secondary injury to the spinal cord, which can occur through movement of unstable spinal segments. This approach is fundamental in the pre-hospital and initial hospital management of trauma patients to protect the spinal cord from further damage.
When managing a wound with significant soft tissue damage, which factor is most crucial in preventing infection?
- Immediate closure of the wound
- Application of a topical antibiotic
- Adequate debridement of necrotic tissue
- Use of prophylactic systemic antibiotics
Correct answer: Adequate debridement of necrotic tissue
Correct answer: Adequate debridement of necrotic tissue. Explanation: Adequate debridement of necrotic tissue is crucial in managing wounds with significant soft tissue damage to prevent infection. Removing non-viable tissue reduces the bacterial load and creates a healthier environment for wound healing.
For a patient with a chemical burn to the hand, which treatment is essential to prevent contractures?
- Immediate grafting
- Application of ice
- Elevation and immobilization
- Physical therapy and range of motion exercises
Correct answer: Physical therapy and range of motion exercises
Correct answer: Physical therapy and range of motion exercises. Explanation: Physical therapy and range of motion exercises are essential for patients with chemical burns to the hand to prevent contractures. These interventions promote flexibility and strength in the affected area, facilitating better functional recovery.
What is the most effective initial management strategy for an anterior shoulder dislocation?
- Long-term sling immobilization
- Surgical intervention
- Closed reduction
- Administration of systemic corticosteroids
Correct answer: Closed reduction
Correct answer: Closed reduction. Explanation: Closed reduction is the most effective initial management strategy for an anterior shoulder dislocation. This procedure involves manipulating the shoulder to return the humeral head back into the glenoid fossa, relieving pain and restoring function more immediately than other options.
In the management of a patient with a globe laceration, which of the following is the most appropriate next step?
- Application of a firm pressure patch over the eye
- Immediate administration of oral antibiotics
- Urgent referral for ophthalmologic surgery
- Instillation of mydriatic eye drops to improve vision
Correct answer: Urgent referral for ophthalmologic surgery
Correct answer: Urgent referral for ophthalmologic surgery. Explanation: For a patient with a globe laceration, the most appropriate next step is an urgent referral for ophthalmologic surgery. Prompt surgical intervention is crucial to repair the laceration, prevent infection, and preserve as much vision as possible.
Which of the following diagnostic tools is most accurate for identifying a scaphoid fracture in the initial assessment following trauma?
- Plain radiography
- MRI
- CT scan
- Ultrasound
Correct answer: MRI
Correct answer: MRI. Explanation: MRI is the most accurate diagnostic tool for identifying a scaphoid fracture in the initial assessment following trauma. It can detect fractures that may not be visible on plain radiographs and provides detailed images of the bone and soft tissues, aiding in the diagnosis of occult fractures.
For a patient with a suspected mandibular fracture, which clinical feature most strongly suggests the presence of this injury?
- Periorbital ecchymosis
- Malocclusion
- Subconjunctival hemorrhage
- Trismus
Correct answer: Malocclusion
Correct answer: Malocclusion. Explanation: Malocclusion, or misalignment of the teeth, is a clinical feature that most strongly suggests the presence of a mandibular fracture. It indicates that the jawbone's integrity has been compromised, affecting the patient's bite and alignment of the teeth.
When treating a patient with a full-thickness burn, which intervention is most critical to prevent hypothermic shock?
- Early escharotomy
- Intravenous fluid resuscitation
- Application of silver sulfadiazine cream
- Maintenance of a warm environment
Correct answer: Maintenance of a warm environment
Correct answer: Maintenance of a warm environment. Explanation: For patients with full-thickness burns, maintaining a warm environment is most critical to prevent hypothermic shock. These patients are at a high risk of losing body heat through their injured skin, and a warm environment helps to preserve body temperature and prevent the complications associated with hypothermia.
Which of the following signs is most indicative of a basilar skull fracture?
- Hemotympanum
- Periorbital ecchymosis (Raccoon eyes)
- Linear fracture on CT
- Deviation of the nose
Correct answer: Periorbital ecchymosis (Raccoon eyes)
Correct answer: Periorbital ecchymosis (Raccoon eyes). Explanation: Periorbital ecchymosis, or "Raccoon eyes," is most indicative of a basilar skull fracture. This sign, along with other clinical features such as Battle's sign (mastoid ecchymosis), suggests the presence of a fracture at the base of the skull.
In the assessment of a patient with an ankle sprain, which grading system is used to classify the severity of ligament injury?
- Ottawa Ankle Rules
- West Point Ankle Grading System
- Lachman Test
- RICE protocol
Correct answer: West Point Ankle Grading System
Correct answer: West Point Ankle Grading System. Explanation: The West Point Ankle Grading System is used to classify the severity of ligament injury in patients with an ankle sprain. It categorizes sprains into three grades based on the extent of ligament damage and functional impairment, guiding treatment decisions.
What is the primary concern in the initial evaluation of a patient with a chemical burn to the eye?
- Determining the pH of the substance
- Assessing for corneal abrasions
- Immediate measurement of intraocular pressure
- Visual acuity assessment
Correct answer: Determining the pH of the substance
Correct answer: Determining the pH of the substance. Explanation: In the initial evaluation of a patient with a chemical burn to the eye, the primary concern is determining the pH of the substance. This information guides the urgency and method of irrigation, as the goal is to neutralize the chemical agent and minimize damage to the eye tissues.
Which intervention is most critical in the initial management of a patient with a suspected pelvic fracture and hemodynamic instability?
- Pelvic binder application
- Immediate laparotomy
- Administration of intravenous broad-spectrum antibiotics
- Skeletal traction
Correct answer: Pelvic binder application
Correct answer: Pelvic binder application. Explanation: In the initial management of a patient with a suspected pelvic fracture and hemodynamic instability, the application of a pelvic binder is most critical. This intervention helps to stabilize the pelvis, reduce hemorrhage, and improve the patient's hemodynamic status by limiting pelvic volume and controlling bleeding.
When assessing a patient with a suspected Le Fort fracture, which clinical sign is most indicative of a Le Fort III fracture?
- Malocclusion
- Mobility of the maxilla when the head is stabilized
- Epistaxis
- CSF rhinorrhea
Correct answer: Mobility of the maxilla when the head is stabilized
Correct answer: Mobility of the maxilla when the head is stabilized. Explanation: Mobility of the maxilla when the head is stabilized is most indicative of a Le Fort III fracture. This type of fracture involves the separation of the facial skeleton from the cranial base, resulting in significant mobility of the midface when the head is immobilized.
For a patient with a traumatic amputation of a finger, which action is most critical for the preservation of the amputated part?
- Immediate reattachment without cooling
- Wrapping the part in dry gauze and placing it in a dry container
- Cooling the part by direct immersion in ice water
- Wrapping the part in moist gauze, placing it in a waterproof bag, and cooling it indirectly with ice
Correct answer: Wrapping the part in moist gauze, placing it in a waterproof bag, and cooling it indirectly with ice
Correct answer: Wrapping the part in moist gauze, placing it in a waterproof bag, and cooling it indirectly with ice. Explanation: For the preservation of an amputated part, it is critical to wrap the part in moist gauze, place it in a waterproof bag, and cool it indirectly with ice. This method helps to preserve the tissue without causing further damage from freezing, increasing the chances of successful reattachment.
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
- Organophosphates
- Carbon monoxide
- Methanol
Correct answer: Organophosphates
Correct answer: Organophosphates. Explanation: Organophosphates, commonly found in pesticides, inhibit acetylcholinesterase, leading to an accumulation of acetylcholine in nerve synapses and neuromuscular junctions. This results in the muscarinic effects seen as sweating, salivation, and miosis.
Which of the following best describes the initial management of a patient with severe hypothermia and cardiac instability?
- Active external warming techniques
- Passive external warming techniques
- Intravenous administration of warm fluids
- Immediate cardiac pacing
Correct answer: Intravenous administration of warm fluids
Correct answer: Intravenous administration of warm fluids. Explanation: In severe hypothermia with cardiac instability, the priority is to rewarm the core temperature quickly to stabilize the patient's cardiac function. Intravenous administration of warm fluids is an effective method for core rewarming in these patients.
A patient presents with acute arsenic poisoning. Which of the following is the most appropriate initial treatment?
- N-acetylcysteine
- Dimercaprol
- Methylene blue
- Sodium bicarbonate
Correct answer: Dimercaprol
Correct answer: Dimercaprol. Explanation: Dimercaprol is a chelating agent that binds to arsenic, allowing it to be excreted from the body. It is the initial treatment of choice for acute arsenic poisoning.
In managing a patient with a black widow spider bite, which of the following is the most effective treatment?
- Corticosteroids
- Antivenom
- Antibiotics
- Analgesics
Correct answer: Antivenom
Correct answer: Antivenom. Explanation: Antivenom is the most effective treatment for a black widow spider bite as it neutralizes the venom, relieving the patient's pain and preventing further systemic effects.
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?
- Lyme disease
- Rocky Mountain spotted fever
- Ehrlichiosis
- Hantavirus pulmonary syndrome
Correct answer: Hantavirus pulmonary syndrome
Correct answer: Hantavirus pulmonary syndrome. Explanation: Hantavirus pulmonary syndrome is transmitted by inhalation of dust contaminated with rodent urine or droppings, often in settings such as old sheds. The symptoms include fever, headache, and a petechial rash, matching the patient's presentation.
Which of the following agents is most likely to cause a cherry red skin coloration in a poisoned patient?
- Cyanide
- Carbon monoxide
- Methemoglobinemia
- Organophosphate poisoning
Correct answer: Carbon monoxide
Correct answer: Carbon monoxide. Explanation: Carbon monoxide poisoning can lead to a cherry red skin coloration due to the formation of carboxyhemoglobin, which has a bright red color. This symptom is a classic but not always present sign of carbon monoxide poisoning.
In a patient with acute radiation sickness, which of the following symptoms would appear first?
- Hair loss
- Skin burns
- Vomiting and nausea
- Bone marrow suppression
Correct answer: Vomiting and nausea
Correct answer: Vomiting and nausea. Explanation: Vomiting and nausea are among the first symptoms to appear following acute radiation exposure, often within hours, as part of the acute radiation syndrome.
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?
- Lyme disease
- Rocky Mountain spotted fever
- Babesiosis
- Ehrlichiosis
Correct answer: Rocky Mountain spotted fever
Correct answer: Rocky Mountain spotted fever. Explanation: Rocky Mountain spotted fever is characterized by fever, headache, and a distinctive maculopapular rash that often starts on the wrists and ankles before spreading. It is transmitted by tick bites.
What is the primary treatment for a patient suffering from botulism?
- Antibiotics
- Botulinum antitoxin
- Corticosteroids
- Supportive care only
Correct answer: Botulinum antitoxin
Correct answer: Botulinum antitoxin. Explanation: The primary treatment for botulism is the administration of botulinum antitoxin, which neutralizes the toxin before it binds to nerve endings. This is crucial in preventing further neurological damage.
In the event of a chemical spill resulting in exposure to hydrofluoric acid, which of the following is the most appropriate first aid measure?
- Flush the area with water for at least 15 minutes
- Apply a tourniquet above the site of exposure
- Neutralize with a baking soda solution
- Immediate administration of calcium gluconate gel
Correct answer: Immediate administration of calcium gluconate gel
Correct answer: Immediate administration of calcium gluconate gel. Explanation: Calcium gluconate gel is the treatment of choice for hydrofluoric acid exposure. It helps to neutralize the acid and prevent the systemic absorption of fluoride ions, which can cause severe metabolic disturbances.
A patient presents with acute respiratory distress syndrome (ARDS) following inhalation of chlorine gas. Which of the following is the most appropriate management strategy?
- High-flow oxygen therapy
- Immediate intubation and mechanical ventilation
- Administration of bronchodilators
- Nebulized sodium bicarbonate
Correct answer: Immediate intubation and mechanical ventilation
Correct answer: Immediate intubation and mechanical ventilation. Explanation: In cases of severe chlorine gas exposure leading to ARDS, the most appropriate management is immediate intubation and mechanical ventilation to support the patient's respiratory function and prevent further lung damage.
What is the recommended treatment for a snakebite from a pit viper when envenomation is suspected?
- Ice application to the bite site
- Immobilization and elevation of the affected limb
- Administration of antivenom
- Tourniquet application above the bite site
Correct answer: Administration of antivenom
Correct answer: Administration of antivenom. Explanation: The administration of antivenom is the recommended treatment for a snakebite from a pit viper when envenomation is suspected. It neutralizes the venom, reducing systemic effects and tissue damage.
Which of the following is a hallmark sign of Ebola virus disease 'EVD'?
- Watery diarrhea
- Profuse sweating
- Hemorrhagic rash
- Vesicular skin lesions
Correct answer: Hemorrhagic rash
Correct answer: Hemorrhagic rash. Explanation: A hallmark sign of Ebola virus disease is a hemorrhagic rash, along with other symptoms such as fever, severe headache, and muscle pain. Ebola is known for its potential to cause severe hemorrhagic fevers.
A patient presents with severe metabolic acidosis and a history of ingesting a household cleaner. Which substance is most likely responsible?
- Sodium hypochlorite
- Ethylene glycol
- Isopropyl alcohol
- Hydrochloric acid
Correct answer: Ethylene glycol
Correct answer: Ethylene glycol. Explanation: Ethylene glycol, commonly found in antifreeze and certain household cleaners, can cause severe metabolic acidosis due to its metabolites. It is more likely than the other options to cause this clinical presentation.
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 colony-stimulating factor (G-CSF)
- Intravenous immunoglobulin
- Platelet transfusion
- Hemodialysis
Correct answer: Granulocyte colony-stimulating factor (G-CSF)
Correct answer: Granulocyte colony-stimulating factor (G-CSF). Explanation: G-CSF is essential for the management of severe acute radiation syndrome as it stimulates the production of neutrophils, helping to prevent infection due to radiation-induced bone marrow suppression.
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?
- Rhododendron
- Oleander
- Jimson weed (Datura)
- Lily of the valley
Correct answer: Jimson weed (Datura)
Correct answer: Jimson weed (Datura). Explanation: Jimson weed (Datura) contains anticholinergic compounds that can cause blurred vision, tachycardia, and urinary retention, matching the patient's symptoms.
For a patient experiencing severe lead poisoning, which of the following chelating agents is preferred?
- Dimercaprol
- Deferoxamine
- Penicillamine
- Calcium disodium edetate 'CaNa2EDTA'
Correct answer: Calcium disodium edetate 'CaNa2EDTA'
Correct answer: Calcium disodium edetate 'CaNa2EDTA'. Explanation: CaNa2EDTA is preferred for severe lead poisoning as it effectively chelates lead, allowing it to be excreted from the body. This agent is particularly used in cases where lead levels are critically high.
Which of the following is the most effective treatment strategy for a patient suffering from digoxin toxicity?
- Activated charcoal
- Hemodialysis
- Digoxin immune Fab
- Sodium bicarbonate
Correct answer: Digoxin immune Fab
Correct answer: Digoxin immune Fab. Explanation: Digoxin immune Fab is the most effective treatment for digoxin toxicity as it binds to the digoxin, neutralizing its effects. This is especially important in cases of life-threatening toxicity.
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
- Methane
- Helium
- Argon
Correct answer: Nitrogen dioxide
Correct answer: Nitrogen dioxide. Explanation: Nitrogen dioxide, a toxic gas found in industrial settings, can cause severe respiratory symptoms such as dyspnea, wheezing, and cough due to its irritant properties on the respiratory tract.
Which of the following findings is most indicative of severe carbon monoxide poisoning on laboratory testing?
- Elevated carboxyhemoglobin level
- Decreased serum bicarbonate
- Elevated white blood cell count
- Hypoxemia
Correct answer: Elevated carboxyhemoglobin level
Correct answer: Elevated carboxyhemoglobin level. Explanation: The most direct and indicative finding of severe carbon monoxide poisoning is an elevated carboxyhemoglobin level, reflecting the amount of carbon monoxide bound to hemoglobin in the blood.
In the context of emergency nursing, which of the following actions is considered a violation of professional boundaries?
- Providing care based on patient needs without personal bias
- Sharing limited personal information to build trust with a patient
- Establishing a friendship with a patient after their discharge
- Advocating for patient rights and autonomy in care decisions
Correct answer: Establishing a friendship with a patient after their discharge
Correct answer: Establishing a friendship with a patient after their discharge. Explanation: Establishing a friendship with a patient after their discharge can lead to a violation of professional boundaries. It may compromise the nurse's objectivity and the patient's perception of professional care. Professional relationships should remain within the confines of the clinical setting to maintain professional integrity and patient trust.
Which of the following best describes the principle of autonomy in emergency nursing practice?
- Making healthcare decisions for patients based on the nurse's judgment
- Respecting and supporting a patient's right to make their own healthcare decisions
- Prioritizing care based on the principle of the greatest good for the greatest number
- Providing care that ensures fairness and equality among all patients
Correct answer: 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. Explanation: The principle of autonomy emphasizes respecting and supporting a patient's right to make their own healthcare decisions. It involves acknowledging the patient's independence and ensuring they have the necessary information to make informed choices about their care.
When dealing with ethical dilemmas in the emergency department, which approach is most appropriate for ensuring ethical decision-making?
- Following the most senior nurse's decision without question
- Adhering strictly to hospital policies and procedures
- Consulting the healthcare team and considering professional ethical guidelines
- Making decisions based on personal moral beliefs and values
Correct answer: Consulting the healthcare team and considering professional ethical guidelines
Correct answer: Consulting the healthcare team and considering professional ethical guidelines. Explanation: In the face of ethical dilemmas, consulting with the healthcare team and considering professional ethical guidelines ensures a comprehensive and balanced approach to decision-making. This method allows for diverse perspectives and adherence to established ethical standards in healthcare.
In emergency nursing, what is the most appropriate action when a conflict arises between a patient's wishes and the family's requests?
- Always prioritize the family's requests over the patient's wishes
- Seek to find a compromise that minimizes legal risks to the hospital
- Prioritize the patient's wishes while considering ethical principles of autonomy
- Refer the decision to hospital administration without further discussion
Correct answer: Prioritize the patient's wishes while considering ethical principles of autonomy
Correct answer: Prioritize the patient's wishes while considering ethical principles of autonomy. Explanation: When conflicts arise between a patient's wishes and the family's requests, the most appropriate action is to prioritize the patient's wishes while considering the ethical principle of autonomy. This principle emphasizes respecting the patient's right to make their own healthcare decisions.
Which statement accurately describes the concept of beneficence in emergency nursing?
- Beneficence involves doing harm to ensure a quicker recovery for the patient.
- It pertains to the nurse's duty to distribute resources equally among patients.
- Beneficence is the obligation to act in the best interest of the patient.
- It means respecting the patient's right to refuse treatment.
Correct answer: Beneficence is the obligation to act in the best interest of the patient.
Correct answer: Beneficence is the obligation to act in the best interest of the patient. Explanation: Beneficence is a fundamental ethical principle in healthcare that involves the obligation to act in the best interest of the patient. It requires nurses and healthcare professionals to provide care that benefits the patient, aiming to maximize positive outcomes and minimize harm.
What is the most appropriate response when an emergency nurse witnesses a colleague providing substandard care?
- Ignore the situation to avoid workplace conflict.
- Report the incident to the nursing manager or supervisor immediately.
- Confront the colleague publicly to shame them into improving their care.
- Offer unsolicited advice on how to provide better care in the future.
Correct answer: Report the incident to the nursing manager or supervisor immediately.
Correct answer: Report the incident to the nursing manager or supervisor immediately. Explanation: When witnessing a colleague providing substandard care, the most appropriate response is to report the incident to a nursing manager or supervisor immediately. This action ensures that the issue is addressed promptly and professionally, maintaining the standard of care and patient safety.
Which of the following actions best demonstrates the principle of non-maleficence in emergency nursing?
- Refusing to provide care to a patient based on personal biases
- Performing a procedure without sufficient training
- Ensuring all interventions minimize harm and risk to the patient
- Allocating resources based on a patient's ability to pay
Correct answer: Ensuring all interventions minimize harm and risk to the patient
Correct answer: Ensuring all interventions minimize harm and risk to the patient. Explanation: The principle of non-maleficence involves avoiding harm to patients. By ensuring all interventions minimize harm and risk, an emergency nurse upholds this principle, focusing on patient safety and the quality of care provided.
How should an emergency nurse act when faced with a situation that conflicts with their personal beliefs but is in accordance with professional guidelines?
- Refuse to provide care that conflicts with personal beliefs
- Provide care, placing professional guidelines above personal beliefs
- Persuade the patient to refuse care that conflicts with the nurse's beliefs
- Transfer care responsibilities to another professional without explanation
Correct answer: Provide care, placing professional guidelines above personal beliefs
Correct answer: Provide care, placing professional guidelines above personal beliefs. Explanation: When faced with a conflict between personal beliefs and professional guidelines, an emergency nurse should provide care by placing professional guidelines and the patient's needs above their personal beliefs. This ensures the delivery of unbiased, ethical care in accordance with professional standards.
Which of the following is a key consideration in maintaining patient privacy and confidentiality in the emergency department?
- Sharing patient information with all staff members to ensure comprehensive care
- Discussing patient cases in public areas of the hospital to facilitate learning
- Limiting access to patient information to those directly involved in the patient's care
- Using social media to seek advice on challenging cases without disclosing names
Correct answer: Limiting access to patient information to those directly involved in the patient's care
Correct answer: Limiting access to patient information to those directly involved in the patient's care. Explanation: Maintaining patient privacy and confidentiality involves limiting access to patient information to those directly involved in the patient's care. This ensures that patient information is protected and shared only on a need-to-know basis, in line with legal and ethical guidelines.
In the context of disaster response, what is the primary ethical concern for emergency nurses?
- Ensuring personal safety before assisting victims
- Maximizing the use of available resources to benefit the greatest number of people
- Providing care based on patients' insurance coverage
- Prioritizing care for individuals with the highest social status
Correct answer: 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. Explanation: In disaster response, the primary ethical concern for emergency nurses is maximizing the use of available resources to benefit the greatest number of people. This approach, known as the principle of utility, guides decision-making in situations where resources are limited, aiming to achieve the greatest good for the greatest number.
What is the role of informed consent in emergency nursing care?
- It is unnecessary in emergencies as care must be provided immediately.
- It involves documenting verbal consent only for legal purposes.
- It requires providing patients with information about their care and obtaining their agreement.
- It allows nurses to make healthcare decisions for patients without their input.
Correct answer: It requires providing patients with information about their care and obtaining their agreement.
Correct answer: It requires providing patients with information about their care and obtaining their agreement. Explanation: Informed consent is a fundamental aspect of ethical care, requiring that patients are provided with clear, comprehensive information about their treatment options and the associated risks and benefits, allowing them to make informed decisions about their care.
Which of the following best reflects the principle of justice in the allocation of scarce resources in the emergency department?
- Allocating resources based on a first-come, first-served basis
- Distributing resources according to patients' social status
- Prioritizing resources based on the severity of the patient's condition
- Assigning resources based on the patient's ability to pay
Correct answer: Prioritizing resources based on the severity of the patient's condition
Correct answer: Prioritizing resources based on the severity of the patient's condition. Explanation: The principle of justice in healthcare emphasizes fairness and equality in the allocation of resources. Prioritizing resources based on the severity of the patient's condition ensures that those who are most in need receive care first, reflecting an equitable approach to healthcare delivery.
In emergency nursing, what is the best approach to handle receiving an order from a physician that seems unsafe or inappropriate for the patient?
- Follow the order without question to maintain the hierarchy
- Refuse to perform the order and not inform the physician
- Discuss the concerns with the physician to seek clarification or modification
- Implement the order then report the physician to the ethics committee
Correct answer: Discuss the concerns with the physician to seek clarification or modification
Correct answer: Discuss the concerns with the physician to seek clarification or modification. Explanation: Discussing concerns with the physician provides an opportunity to clarify the rationale behind the order and seek modification if necessary. This collaborative approach ensures patient safety and care quality while maintaining professional relationships.
What is the most appropriate course of action for an emergency nurse who identifies a systemic issue that affects patient safety?
- Ignore the issue assuming it is part of the system's inefficiencies
- Report the issue to the appropriate management or quality improvement team
- Discuss the issue with patients to gauge their perception
- Solve the issue individually without involving others
Correct answer: Report the issue to the appropriate management or quality improvement team
Correct answer: Report the issue to the appropriate management or quality improvement team. Explanation: Reporting systemic issues to the appropriate management or quality improvement team is crucial for addressing and resolving factors that affect patient safety. This action facilitates the implementation of systemic changes to improve care quality and safety.
How should an emergency nurse proceed when a patient lacks the capacity to give informed consent and no legal surrogate is available?
- Proceed with treatment based on what the nurse believes is best
- Wait until a legal surrogate is appointed before providing any treatment
- Provide necessary emergency treatment guided by the principle of implied consent
- Ask the patient's friends for their opinion on the treatment
Correct answer: Provide necessary emergency treatment guided by the principle of implied consent
Correct answer: Provide necessary emergency treatment guided by the principle of implied consent. Explanation: In situations where a patient lacks the capacity to give informed consent and no legal surrogate is available, the principle of implied consent allows healthcare providers to deliver necessary emergency treatment. This principle assumes that the patient would consent to treatment if they were able, especially in life-threatening situations.
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 ignore the cultural practice to avoid discrimination
- The nurse should prioritize conventional medical treatment over cultural practices
- The nurse should attempt to accommodate the cultural practice within the bounds of ethical and safe medical care
- The nurse should delegate care to another nurse who agrees with the cultural practice
Correct answer: The nurse should attempt to accommodate the cultural practice within the bounds of ethical and safe medical care
Correct answer: The nurse should attempt to accommodate the cultural practice within the bounds of ethical and safe medical care. Explanation: Accommodating a patient's cultural practices within the bounds of ethical and safe medical care respects the patient's cultural identity and beliefs while ensuring that care is not compromised. This approach promotes holistic and patient-centered care.
When an emergency nurse encounters a professional dilemma that is not addressed by existing policies or guidelines, what is the most appropriate initial action?
- Act based on personal experience and judgment
- Seek guidance from a senior nurse or mentor
- Postpone decision-making until a policy is developed
- Refer the dilemma to the hospital's ethics committee for review
Correct answer: Seek guidance from a senior nurse or mentor
Correct answer: Seek guidance from a senior nurse or mentor. Explanation: Seeking guidance from a senior nurse or mentor allows for the consideration of experienced perspectives in addressing professional dilemmas. This approach ensures informed decision-making in situations where policies or guidelines are not clear.
Which of the following actions demonstrates an emergency nurse's commitment to lifelong learning and professional development?
- Only attending mandatory training sessions required by the employer
- Focusing solely on gaining practical skills without theoretical knowledge
- Regularly participating in continuing education and professional development activities
- Avoiding new technologies or practices to maintain traditional care methods
Correct answer: Regularly participating in continuing education and professional development activities
Correct answer: Regularly participating in continuing education and professional development activities. Explanation: Regular participation in continuing education and professional development activities demonstrates an emergency nurse's commitment to lifelong learning. This commitment is crucial for staying current with advancements in healthcare and improving patient care.
What is the recommended approach for an emergency nurse who receives a complaint from a patient about the care provided?
- Dismiss the complaint as a misunderstanding on the patient's part
- Listen actively, acknowledge the patient's concerns, and follow up according to hospital policy
- Advise the patient to file a formal complaint with hospital administration
- Promise immediate corrective action without understanding the full context
Correct answer: Listen actively, acknowledge the patient's concerns, and follow up according to hospital policy
Correct answer: Listen actively, acknowledge the patient's concerns, and follow up according to hospital policy. Explanation: Actively listening to, acknowledging, and following up on patient complaints according to hospital policy ensures that patients feel heard and valued. This approach also facilitates the identification and resolution of issues related to patient care and satisfaction.
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?
- Asthma
- Pneumothorax
- Pulmonary embolism
- Acute bronchitis
Correct answer: Pulmonary embolism
Correct answer: Pulmonary embolism. Explanation: The patient's symptoms of severe dyspnea, sharp chest pain that worsens with inspiration, and a history of deep vein thrombosis strongly suggest a pulmonary embolism, which occurs when a blood clot travels to the lungs, blocking blood flow.
A patient presents with severe pelvic pain, adnexal mass on ultrasound, and elevated CA-125. Which of the following is the most likely diagnosis?
- Endometriosis
- Ovarian cancer
- Pelvic inflammatory disease
- Ectopic pregnancy
Correct answer: Ovarian cancer
Correct answer: Ovarian cancer. Explanation: The combination of severe pelvic pain, an adnexal mass on ultrasound, and elevated CA-125 levels is most suggestive of ovarian cancer. CA-125 is a tumor marker that can be elevated in ovarian cancer, although it is not specific and can be elevated in other conditions.
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?
- Oral acetazolamide
- Topical beta-blockers
- Oral prednisone
- Intravenous mannitol
Correct answer: Intravenous mannitol
Correct answer: Intravenous mannitol. Explanation: Intravenous mannitol is used urgently in cases of acute angle-closure glaucoma to rapidly lower intraocular pressure and prevent permanent vision loss.
A patient presents to the emergency department with jaundice, abdominal pain, and dark urine. Which of the following conditions is the most likely diagnosis?
- Hepatitis
- Pancreatic cancer
- Cholecystitis
- Hemolytic anemia
Correct answer: Hepatitis
Correct answer: Hepatitis. Explanation: The combination of jaundice, abdominal pain, and dark urine is highly indicative of hepatitis, an inflammation of the liver that can be caused by viruses, alcohol use, or other factors.
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?
- Dry skin and mucous membranes
- Dilated pupils
- Muscle weakness and fasciculations
- Hyperthermia
Correct answer: Muscle weakness and fasciculations
Correct answer: Muscle weakness and fasciculations. Explanation: Exposure to nerve agents typically presents with muscle weakness and fasciculations, along with other symptoms of cholinergic excess such as salivation, lacrimation, urination, defecation, gastrointestinal upset, and emesis (SLUDGE syndrome).
In evaluating a patient with a suspected mallet finger, which finding is most characteristic of this injury?
- Inability to actively extend the distal interphalangeal (DIP) joint
- Swelling at the base of the thumb
- Hyperextension of the proximal interphalangeal joint
- Pain along the ulnar side of the wrist
Correct answer: Inability to actively extend the distal interphalangeal (DIP) joint
Correct answer: Inability to actively extend the distal interphalangeal (DIP) joint. Explanation: The most characteristic finding of a mallet finger is the inability to actively extend the distal interphalangeal (DIP) joint. This injury occurs when there is damage to the extensor tendon at the DIP joint, often due to a direct blow to the tip of the finger, causing the finger to droop.
How should an emergency nurse manage personal information about a patient discovered through social media?
- Use the information to inform clinical decision-making
- Share the information with the healthcare team to improve patient care
- Keep the information confidential and not allow it to influence care
- Discuss the information with the patient to verify its accuracy
Correct answer: Keep the information confidential and not allow it to influence care
Correct answer: Keep the information confidential and not allow it to influence care. Explanation: Keeping personal information about a patient discovered through social media confidential and not allowing it to influence care respects the patient's privacy and maintains professional boundaries. Personal information obtained outside of the clinical setting should not impact the provision of care.
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 infused slowly over 10 minutes
- 1 mg given as a slow IV push over 2 minutes
- 6 mg given as a rapid IV push followed immediately by a saline flush
- 150 mg infused over 10 minutes
Correct answer: 6 mg given as a rapid IV push followed immediately by a saline flush
The correct approach is 6 mg of adenosine given as a rapid IV push followed immediately by a saline flush. Adenosine has an extremely short half-life of only seconds, so it must be pushed rapidly through a proximal IV and chased with saline to reach the AV node before it is metabolized; a slow infusion would be ineffective. If the first 6 mg dose fails to convert the supraventricular tachycardia, a 12 mg dose may follow. The 150 mg figure refers to amiodarone, not adenosine.
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?
- Begin chest compressions
- Administer a 1 to 2 gram magnesium sulfate bolus
- Immediately defibrillate at 200 joules
- Administer a second adenosine dose of 12 mg by rapid IV push
Correct answer: Administer a second adenosine dose of 12 mg by rapid IV push
The appropriate next step is a second adenosine dose of 12 mg given by rapid IV push, since the patient is still stable with a regular narrow-complex rhythm and the initial 6 mg dose failed. Stepwise escalation to 12 mg is standard before considering rate-controlling agents or cardioversion. Defibrillation and chest compressions are not indicated in a perfusing, conscious patient, and magnesium is reserved for torsades de pointes.
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?
- A fluid challenge of 2 liters of normal saline
- Unsynchronized defibrillation
- Oral metoprolol
- Synchronized cardioversion
Correct answer: Synchronized cardioversion
Synchronized cardioversion is the priority for an unstable patient with a regular narrow-complex tachycardia because it delivers the shock timed to the R wave, avoiding the vulnerable repolarization period that could trigger ventricular fibrillation. Unsynchronized defibrillation is reserved for pulseless VT, ventricular fibrillation, or polymorphic VT where synchronization is not possible. Oral agents act too slowly for an unstable patient, and a fluid challenge does not address the arrhythmia.
The emergency nurse is asked to explain the difference between synchronized cardioversion and defibrillation to a new graduate. Which statement is accurate?
- Synchronized cardioversion is used only for asystole
- Defibrillation is timed to the T wave to avoid the R wave
- Defibrillation is always delivered at a lower energy than cardioversion
- Synchronized cardioversion times the shock to the R wave, while defibrillation delivers an immediate unsynchronized shock
Correct answer: Synchronized cardioversion times the shock to the R wave, while defibrillation delivers an immediate unsynchronized shock
The accurate statement is that synchronized cardioversion times the shock to the R wave, while defibrillation delivers an immediate unsynchronized shock. Synchronizing to the R wave prevents the energy from landing on the T wave, where a shock could induce ventricular fibrillation. Defibrillation is used for pulseless rhythms such as ventricular fibrillation and pulseless ventricular tachycardia and is intentionally not synchronized because there is no organized R wave 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 6 mg rapid IV push
- Magnesium sulfate 1 to 2 grams IV
- Diltiazem 0.25 mg/kg IV
- Atropine 1 mg IV
Correct answer: Magnesium sulfate 1 to 2 grams IV
Magnesium sulfate 1 to 2 grams IV is the first-line pharmacologic therapy for torsades de pointes because it stabilizes the myocardium and helps suppress the early afterdepolarizations that drive this polymorphic rhythm, even when the serum magnesium is normal. Adenosine and diltiazem target supraventricular tachycardias and would not treat torsades. If the patient becomes pulseless or unstable, immediate defibrillation is required because the polymorphic morphology cannot be reliably synchronized.
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?
- A slow magnesium infusion over 30 minutes
- Unsynchronized defibrillation
- Carotid sinus massage
- Synchronized cardioversion at 50 joules
Correct answer: Unsynchronized defibrillation
Unsynchronized defibrillation is the immediate intervention for pulseless torsades de pointes because the irregular polymorphic QRS complexes prevent the defibrillator from reliably sensing an R wave for synchronization. Attempting synchronized cardioversion would cause the device to hesitate or fail to discharge. Magnesium can follow once a shock is delivered, and carotid massage has no role in a pulseless polymorphic rhythm.
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?
- Inferior STEMI involving the right coronary artery
- Anterior STEMI involving the left anterior descending territory
- Posterior STEMI
- Lateral wall non-ST-elevation MI
Correct answer: Anterior STEMI involving the left anterior descending territory
This pattern represents an anterior STEMI involving the left anterior descending coronary artery territory because leads V2, V3, and V4 reflect the anterior wall of the left ventricle. ST elevation in two or more contiguous precordial leads meeting threshold confirms acute injury to that region. Inferior infarcts show changes in II, III, and aVF, and a true non-ST-elevation MI by definition would not show diagnostic ST elevation.
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?
- A prolonged PR interval greater than 200 milliseconds
- New ST elevation of at least 1 mm in two contiguous limb leads, or at least 2 mm in leads V2 and V3 for a man this age
- ST elevation of 0.5 mm in one precordial lead
- Isolated T-wave inversion in a single lead
Correct answer: New ST elevation of at least 1 mm in two contiguous limb leads, or at least 2 mm in leads V2 and V3 for a man this age
STEMI criteria are met by new ST elevation of at least 1 mm in two contiguous limb leads, or at least 2 mm in leads V2 and V3 for a man of this age (the V2-V3 threshold is higher because mild elevation there is normal). The elevation must appear in anatomically contiguous leads to localize true injury. Isolated single-lead T-wave inversion, sub-threshold 0.5 mm elevation, and PR prolongation do not meet STEMI criteria.
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?
- Non-ST-elevation myocardial infarction (NSTEMI)
- ST-elevation myocardial infarction (STEMI)
- Acute pericarditis
- Stable angina
Correct answer: Non-ST-elevation myocardial infarction (NSTEMI)
This presentation is consistent with a non-ST-elevation myocardial infarction (NSTEMI), defined by myocardial injury with elevated troponin but without ST-segment elevation meeting STEMI criteria. A STEMI would show diagnostic ST elevation reflecting complete coronary occlusion, whereas an NSTEMI typically reflects partial or transient occlusion. Stable angina would not raise troponin, and pericarditis classically produces diffuse ST elevation rather than depression.
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?
- NSTEMI always produces ST elevation while STEMI does not
- NSTEMI requires immediate fibrinolytic therapy while STEMI does not
- STEMI typically reflects complete coronary occlusion, while NSTEMI usually reflects partial or transient occlusion
- STEMI never elevates troponin while NSTEMI does
Correct answer: STEMI typically reflects complete coronary occlusion, while NSTEMI usually reflects partial or transient occlusion
The correct statement is that STEMI typically reflects complete coronary occlusion, while NSTEMI usually reflects partial or transient occlusion. Both raise troponin because both involve myocardial necrosis, but only STEMI produces the diagnostic ST elevation that signals a fully occluded vessel requiring emergent reperfusion. Fibrinolytics are reserved for STEMI when timely catheter-based reperfusion is unavailable, not for NSTEMI.
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?
- Apply continuous cardiac monitoring, obtain IV access, give aspirin, and provide supplemental oxygen only if the saturation is below 90 percent
- Encourage the patient to ambulate to assess exertional tolerance
- Administer oxygen at 15 liters per minute regardless of saturation
- Withhold all medications until the cardiologist arrives
Correct answer: Apply continuous cardiac monitoring, obtain IV access, give aspirin, and provide supplemental oxygen only if the saturation is below 90 percent
The most appropriate early bundle is continuous cardiac monitoring, IV access, aspirin, and supplemental oxygen only when the saturation is below 90 percent. Routine high-flow oxygen in a normoxic patient is no longer recommended because it offers no benefit and may cause coronary vasoconstriction. Aspirin should be given early unless contraindicated, and ambulation increases myocardial oxygen demand and is contraindicated during active infarction.
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
- Nitroglycerin
- Labetalol
- Furosemide
Correct answer: Norepinephrine
Norepinephrine is the preferred first-line vasoactive agent in cardiogenic shock because it raises perfusion pressure with fewer arrhythmias than dopamine while supporting cardiac output. Nitroglycerin and labetalol both lower blood pressure and would worsen the existing hypotension. Furosemide treats volume overload but does not address the profound hypoperfusion that defines cardiogenic shock.
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?
- Intra-aortic balloon pump support
- Aggressive crystalloid bolus of 4 liters
- Administration of a beta-blocker
- Synchronized cardioversion
Correct answer: Intra-aortic balloon pump support
Intra-aortic balloon pump support is the anticipated mechanical adjunct in refractory cardiogenic shock because balloon inflation during diastole augments coronary perfusion and deflation just before systole reduces left ventricular afterload. A large crystalloid bolus risks worsening pulmonary edema in a failing pump, and beta-blockers further depress contractility. Cardioversion treats unstable tachyarrhythmias, not pump failure.
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 raised intracranial pressure
- Virchow's triad, indicating venous thrombosis
- Charcot's triad, indicating cholangitis
- Beck's triad, indicating cardiac tamponade
Correct answer: Beck's triad, indicating cardiac tamponade
This combination is Beck's triad, indicating cardiac tamponade: hypotension, jugular venous distention, and muffled heart sounds together signal that fluid in the pericardial sac is restricting ventricular filling. Cushing's triad describes hypertension, bradycardia, and irregular respirations from raised intracranial pressure. Virchow's and Charcot's triads describe thrombosis risk and cholangitis, respectively.
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?
- Needle thoracostomy at the second intercostal space
- Transcutaneous pacing
- Synchronized cardioversion
- Pericardiocentesis
Correct answer: Pericardiocentesis
Pericardiocentesis is the emergent intervention for cardiac tamponade because aspirating fluid from the pericardial sac immediately relieves the pressure restricting ventricular filling, often producing a rapid rise in blood pressure. Needle thoracostomy treats tension pneumothorax, not tamponade. Cardioversion and pacing address electrical disturbances and do not remove the mechanical compression caused by pericardial fluid.
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 dissection
- Acute pericarditis
- Atrial fibrillation
- Stable angina
Correct answer: Acute aortic dissection
These findings most strongly suggest acute aortic dissection: tearing pain radiating to the back combined with a significant blood pressure difference between the arms reflects disruption of flow through branches of the dissecting aorta. Pericarditis produces positional, pleuritic pain with a friction rub rather than inter-arm pressure differences. Stable angina and atrial fibrillation do not cause tearing back pain with 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?
- Coagulation, with a heparin infusion
- Serum glucose, with an insulin infusion
- Heart rate and the force of ventricular contraction, typically beginning with an IV beta-blocker
- Preload, by administering a large IV fluid bolus
Correct answer: Heart rate and the force of ventricular contraction, typically beginning with an IV beta-blocker
The first goal is controlling heart rate and the force of ventricular contraction, typically beginning with an IV beta-blocker, because reducing the shearing forces on the aortic wall limits propagation of the dissection. Beta-blockade is given before vasodilators to avoid reflex tachycardia that would increase wall stress. A fluid bolus and anticoagulation are inappropriate, and heparin in particular could worsen bleeding from the dissection.
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, because there is no end-organ involvement
- Orthostatic hypertension
- White-coat hypertension
- Hypertensive emergency, because of evidence of acute end-organ damage
Correct answer: Hypertensive emergency, because of evidence of acute end-organ damage
This is a hypertensive emergency because the severely elevated blood pressure is accompanied by evidence of acute end-organ damage, including the cardiac injury reflected by chest pain and troponin elevation along with neurologic and visual symptoms. Hypertensive urgency is severe hypertension without end-organ damage and is managed with gradual oral therapy. The presence of organ injury, not the absolute pressure number alone, defines an emergency.
The emergency nurse is teaching a colleague the distinction between hypertensive emergency and hypertensive urgency. Which statement correctly captures the difference?
- A hypertensive emergency includes acute end-organ damage, while hypertensive urgency is severe hypertension without end-organ damage
- Hypertensive emergency is managed with gradual oral medication over several days
- Hypertensive urgency requires immediate IV antihypertensives in an intensive care setting
- A hypertensive emergency is defined solely by a systolic pressure above 200 regardless of symptoms
Correct answer: A hypertensive emergency includes acute end-organ damage, while hypertensive urgency is severe hypertension without end-organ damage
The correct distinction is that a hypertensive emergency includes acute end-organ damage, while hypertensive urgency is severe hypertension without end-organ damage. The presence or absence of organ injury, not any single pressure threshold, separates the two. Emergencies require controlled IV therapy with close monitoring, whereas urgencies are managed with gradual oral therapy, making the reversed descriptions incorrect.
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?
- Unsynchronized defibrillation
- Rate control with an IV agent such as diltiazem
- Administration of adenosine 6 mg rapid IV push
- Immediate synchronized cardioversion
Correct answer: Rate control with an IV agent such as diltiazem
For a hemodynamically stable patient in atrial fibrillation with rapid ventricular response, rate control with an IV agent such as diltiazem is the anticipated approach because slowing AV nodal conduction reduces the ventricular rate and relieves symptoms. Immediate cardioversion is reserved for unstable patients with hypotension, ischemic chest pain, or altered mental status. Adenosine does not control the irregular, multi-focal atrial activity of atrial fibrillation.
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?
- Synchronized cardioversion
- A 24-hour Holter monitor
- Carotid sinus massage
- Continued IV rate control with metoprolol
Correct answer: Synchronized cardioversion
Synchronized cardioversion is the most appropriate intervention because the patient is now unstable, demonstrated by hypotension, ischemic chest pain, and a declining level of consciousness in the setting of a rapid tachyarrhythmia. Synchronizing the shock to the R wave avoids triggering ventricular fibrillation. Continued rate-control medication acts too slowly for instability, and a Holter monitor is an outpatient diagnostic tool inappropriate for an acutely unstable patient.
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?
- Administer a rapid 2-liter normal saline bolus
- Encourage the patient to lie on the left side
- Lay the patient flat and apply a nasal cannula at 2 liters per minute
- Place the patient upright and apply noninvasive positive-pressure ventilation
Correct answer: Place the patient upright and apply noninvasive positive-pressure ventilation
Placing the patient upright and applying noninvasive positive-pressure ventilation is the priority because the upright position reduces venous return and the positive pressure forces fluid out of the alveoli while decreasing the work of breathing. Lying flat worsens pulmonary congestion, and a large fluid bolus would increase the volume overload already flooding the lungs in acute cardiogenic pulmonary edema.
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 ST elevation confined to contiguous anterior leads
- Reciprocal ST depression in the inferior leads
- Diffuse ST elevation that does not follow a single coronary artery distribution, with PR-segment depression
- Deep pathologic Q waves in two contiguous leads
Correct answer: Diffuse ST elevation that does not follow a single coronary artery distribution, with PR-segment depression
Diffuse ST elevation that does not follow a single coronary artery distribution, accompanied by PR-segment depression, most distinguishes acute pericarditis from a STEMI. A STEMI produces ST elevation localized to the leads of one coronary territory, often with reciprocal depression, because injury is regional. The widespread, concave elevation of pericarditis reflects generalized epicardial inflammation rather than a focal occlusion.
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?
- Intravenous sodium thiosulfate as the definitive antidote for carbon monoxide
- High-flow 100 percent oxygen by a non-rebreather mask, started immediately and continued until carboxyhemoglobin falls and symptoms resolve
- Room-air observation alone, because carbon monoxide clears on its own within an hour
- Intravenous methylene blue to convert the abnormal hemoglobin back to its normal form
Correct answer: High-flow 100 percent oxygen by a non-rebreather mask, started immediately and continued until carboxyhemoglobin falls and symptoms resolve
The most important initial treatment is high-flow 100 percent oxygen delivered by a non-rebreather mask, given immediately and continued until carboxyhemoglobin levels drop and symptoms clear. Oxygen displaces carbon monoxide from hemoglobin: the carboxyhemoglobin half-life is roughly 240 to 300 minutes on room air but falls to about 60 to 90 minutes on 100 percent oxygen, and to roughly 20 to 30 minutes with hyperbaric oxygen. Hyperbaric oxygen is considered for severe cases such as loss of consciousness, neurologic deficits, cardiac ischemia, or pregnancy, but normobaric 100 percent oxygen is the immediate first-line step. Methylene blue treats methemoglobinemia and thiosulfate is used for cyanide, not carbon monoxide.
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?
- Flumazenil given once to reverse the cholinergic crisis
- Naloxone titrated until the pupils dilate, with no role for a second antidote
- Atropine titrated until secretions dry and ventilation improves, plus pralidoxime to reactivate acetylcholinesterase
- Physostigmine titrated until secretions increase, plus activated charcoal as the definitive therapy
Correct answer: Atropine titrated until secretions dry and ventilation improves, plus pralidoxime to reactivate acetylcholinesterase
The anticipated therapy is atropine titrated until secretions dry and oxygenation improves, combined with pralidoxime to reactivate the inhibited acetylcholinesterase. Organophosphate poisoning produces a cholinergic crisis (the SLUDGE picture plus bradycardia and bronchorrhea); atropine blocks the excess muscarinic effects, and the clinical endpoint is clearing of bronchial secretions rather than a target heart rate or pupil size. Pralidoxime addresses nicotinic effects such as fasciculations and weakness and must be given early before enzyme aging. Naloxone, flumazenil, and physostigmine do not treat organophosphate toxicity, and physostigmine would worsen a cholinergic crisis.
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?
- Apply only a surgical mask to the patient and place them in the general waiting area
- Defer any isolation until measles is confirmed by serology
- Use contact precautions with gown and gloves but no respiratory protection
- Place the patient in an airborne-infection isolation room and have staff wear a fit-tested N95 respirator on entry
Correct answer: Place the patient in an airborne-infection isolation room and have staff wear a fit-tested N95 respirator on entry
The correct action is to place the patient in an airborne-infection isolation room (negative pressure) and have staff wear a fit-tested N95 respirator on entry, because the presentation is classic for measles, which is transmitted by the airborne route. Airborne precautions and N95 use apply regardless of staff immunity status, and isolation must begin on suspicion rather than waiting for laboratory confirmation. A surgical mask in a shared waiting area, contact-only precautions, and delaying isolation until serology returns all risk spreading a highly contagious airborne disease.
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 N-acetylcysteine as the specific antidote that neutralizes salicylate
- Intravenous calcium gluconate to bind and inactivate the salicylate
- Intravenous sodium bicarbonate to alkalinize the serum and urine, which increases renal excretion of salicylate
- Withholding all bicarbonate to allow the urine to remain acidic and trap the drug
Correct answer: Intravenous sodium bicarbonate to alkalinize the serum and urine, which increases renal excretion of salicylate
The anticipated intervention is intravenous sodium bicarbonate to alkalinize the serum and urine, which markedly increases renal elimination of salicylate. Raising the urine pH toward 8 ionizes the weak-acid salicylate so it cannot be reabsorbed in the renal tubules, increasing clearance many-fold; alkalinization also limits movement of salicylate into the brain. The classic toxidrome is tinnitus with a mixed respiratory alkalosis and metabolic acidosis. N-acetylcysteine treats acetaminophen, calcium gluconate does not bind salicylate, and acidic urine would trap salicylate and worsen toxicity.
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 beta-agonist infusion as the sole therapy, avoiding calcium entirely
- Intravenous flumazenil and naloxone given together to reverse the cardiac depression
- Oral activated charcoal only, with no role for any cardiovascular medications
- Intravenous calcium and glucagon, followed by high-dose insulin with dextrose if hypotension remains refractory
Correct answer: Intravenous calcium and glucagon, followed by high-dose insulin with dextrose if hypotension remains refractory
The anticipated approach is intravenous calcium and glucagon, escalating to high-dose insulin with dextrose (high-dose insulin euglycemic therapy) when hypotension is refractory. Calcium increases extracellular calcium to overcome the channel blockade, glucagon raises cardiac contractility through a non-adrenergic pathway, and high-dose insulin improves myocardial performance and is a mainstay for refractory calcium channel blocker or beta-blocker toxicity; glucose and potassium must be monitored closely. Flumazenil and naloxone do not treat this toxicity, a beta-agonist alone is inadequate, and charcoal alone will not reverse established shock.
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?
- Apply an ice pack directly to the wound for at least 30 minutes to slow venom spread
- Apply a tight arterial tourniquet above the wound and leave it in place for transport
- Pour cold fresh water over the wound and pack the foot in ice
- Immerse the affected area in hot water (about 110 to 113 degrees Fahrenheit, tolerable to touch) to inactivate the heat-labile venom
Correct answer: Immerse the affected area in hot water (about 110 to 113 degrees Fahrenheit, tolerable to touch) to inactivate the heat-labile venom
The priority intervention is immersing the affected area in hot water at a temperature tolerable to touch (about 110 to 113 degrees Fahrenheit) to inactivate the heat-labile stingray venom and relieve the intense pain. The wound should also be irrigated and inspected for retained spine fragments, with tetanus prophylaxis and monitoring for infection. Cold or ice application does not neutralize this venom and can worsen tissue injury, and an arterial tourniquet is not indicated and risks limb ischemia.
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 arrived ambulatory and is talking
- ESI level 2, because this is a high-risk situation that should not wait
- ESI level 3, because the patient is currently stable and alert
- ESI level 1, because chest pain is always the most urgent presentation
Correct answer: ESI level 2, because this is a high-risk situation that should not wait
ESI level 2 is correct because the Emergency Severity Index assigns level 2 to high-risk situations, severe pain or distress, or new confusion/lethargy even when the patient is not currently dying. New-onset crushing chest pain with diaphoresis is a classic high-risk presentation that should not wait for an open bed. ESI level 1 is reserved for patients requiring immediate life-saving intervention, which this patient does not yet need.
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, ESI level 5, counting each test individually
- Three resources, ESI level 3, counting labs as one, CT as one, and the IV fluid bolus as one
- One resource, ESI level 5, because the patient is stable
- Two resources, ESI level 4, because IV fluids never count
Correct answer: Three resources, ESI level 3, counting labs as one, CT as one, and the IV fluid bolus as one
Three resources counted as labs (one), CT imaging (one), and the IV fluid bolus (one), yielding ESI level 3, is correct. The ESI counts resources by type, not by number of individual tests, so the CBC, metabolic panel, and urinalysis together count as a single lab resource. Because the patient needs two or more resources and is hemodynamically stable, ESI level 3 applies. A maintenance-only IV would not count, but a resuscitation or medication bolus does.
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 signed financial responsibility form and insurance verification
- A complete admission and inpatient bed assignment
- A transfer to the patient's in-network hospital of choice
- An appropriate medical screening examination to determine whether an emergency medical condition exists
Correct answer: An appropriate medical screening examination to determine whether an emergency medical condition exists
An appropriate medical screening examination to determine whether an emergency medical condition exists is correct. EMTALA requires that any individual who comes to a dedicated emergency department requesting examination or treatment receive a medical screening exam, performed in a non-disparate manner, before any inquiry about insurance or payment. Registration may occur, but it cannot delay the screening exam or be used to discourage care.
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?
- Obtaining her consent for transfer to a higher-level hospital
- Delivery of both the baby and the placenta
- A normal fetal heart rate documented one time on the monitor
- Administering pain medication and discharging her to her own obstetrician
Correct answer: Delivery of both the baby and the placenta
Delivery of both the baby and the placenta is correct. EMTALA defines a woman in active labor as having an emergency medical condition, and stabilization for that condition specifically means completing delivery of the infant and the placenta. A hospital with obstetric capability generally may not transfer a woman in active labor unless the benefits of transfer outweigh the risks; simply documenting a normal fetal heart rate does not stabilize active labor.
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?
- Document the findings only and take no further action unless the patient asks for help
- Report the suspected elder abuse or neglect to the appropriate protective agency as a mandated reporter
- Wait until the injuries are confirmed by a physician before filing any report
- Discharge the patient to the same caregiver with written safety instructions
Correct answer: Report the suspected elder abuse or neglect to the appropriate protective agency as a mandated reporter
Reporting the suspected elder abuse or neglect to the appropriate protective agency as a mandated reporter is correct. Nurses are mandatory reporters and are legally required to report reasonable suspicion of abuse or neglect of vulnerable adults; confirmation of abuse is not required to file, only a reasonable suspicion. Waiting for proof or discharging the patient back to the suspected abuser would violate the duty to protect and the mandatory reporting law.
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 nurse should cancel donation because registry enrollment can always be revoked by the next of kin
- The hospital should notify the organ procurement organization, which checks the registry and, as first-person authorization, honors the patient's prior decision
- Donation is impossible after death in the emergency department because organs are only recovered from brain-dead patients in the ICU
- The nurse should obtain donation consent directly from the family before anyone contacts the organ procurement organization
Correct answer: The hospital should notify the organ procurement organization, which checks the registry and, as first-person authorization, honors the patient's prior decision
Notifying the organ procurement organization, which checks the registry and honors the patient's prior decision as first-person authorization, is correct. Hospital staff do not approach families for consent themselves; they make a timely referral to the OPO, which determines suitability and verifies registry status. A documented registry enrollment is legally binding first-person authorization that family members cannot revoke. Donation after circulatory death also makes recovery possible outside the ICU.
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?
- Express written consent obtained from the transporting paramedic
- Substituted judgment requiring a court order before any intervention
- Implied consent under the emergency exception, presuming the patient would agree to life-saving care
- Therapeutic privilege allowing the team to withhold information indefinitely
Correct answer: Implied consent under the emergency exception, presuming the patient would agree to life-saving care
Implied consent under the emergency exception is correct. When a patient is incapacitated, no surrogate is available, and delay would threaten life or limb, the law presumes a reasonable person would consent to necessary emergency care. This presumption is overridden only by clear prior evidence of refusal, such as a valid DNR or advance directive. A paramedic cannot give consent for the patient, and a court order is not required to provide emergency treatment.
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?
- Ignore the documents because they are only valid in the patient's home
- Begin full resuscitation because all patients arriving in arrest must receive CPR
- Honor the POLST and advance directive and provide comfort-focused care without CPR
- Resuscitate until a hospital ethics committee reviews the documents
Correct answer: Honor the POLST and advance directive and provide comfort-focused care without CPR
Honoring the POLST and advance directive and providing comfort-focused care without CPR is correct. A valid POLST is a portable medical order that emergency providers and receiving facilities are required to recognize and follow across care settings. Overriding a valid directive and performing unwanted resuscitation violates the patient's autonomy and the legal force of the document. Ethics review is not needed to follow a clear, valid order.
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?
- Administering an intravenous push medication ordered for chest pain
- Obtaining a set of routine vital signs on a stable, already-triaged patient
- Providing discharge teaching on a new anticoagulant prescription
- Performing the initial triage acuity assignment for new arrivals
Correct answer: Obtaining a set of routine vital signs on a stable, already-triaged patient
Obtaining a set of routine vital signs on a stable, already-triaged patient is correct. Delegation requires matching the task to the delegate's training and scope, and routine vital signs on a stable patient are a standard task for unlicensed assistive personnel. Triage acuity assignment, IV medication administration, and patient teaching all require nursing assessment, clinical judgment, or licensure and cannot be delegated to unlicensed staff.
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?
- All three should be roomed in arrival order to be fair
- The patient with the wrist fracture, because orthopedic injuries are time-sensitive
- The patient requesting the prescription refill, to clear the waiting room quickly
- The patient with slurred speech and right-sided weakness suggesting acute stroke
Correct answer: The patient with slurred speech and right-sided weakness suggesting acute stroke
The patient with slurred speech and right-sided weakness suggesting acute stroke should be seen first. New focal neurologic deficits within a narrow time window represent a high-risk, time-critical emergency where rapid evaluation directly affects outcomes, making this the highest triage priority. A stable closed fracture and a prescription refill are lower-acuity and can safely wait; prioritization is driven by acuity and risk, not by arrival order or fairness.
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?
- Acute respiratory acidosis from hypoventilation, with no renal compensation yet
- Acute respiratory alkalosis from hyperventilation
- Primary metabolic acidosis with respiratory compensation
- Chronic respiratory acidosis with full renal compensation
Correct answer: Acute respiratory acidosis from hypoventilation, with no renal compensation yet
Acute respiratory acidosis from hypoventilation is correct. The pH below 7.35 marks acidemia, the PaCO2 above 45 mmHg identifies the respiratory cause as sedative-induced hypoventilation traps carbon dioxide, and the normal bicarbonate near 24 mEq/L confirms the kidneys have not had time to compensate. A chronic process would show an elevated bicarbonate, and a metabolic acidosis would be driven by a low bicarbonate rather than a high PaCO2.
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:
- Uncompensated metabolic acidosis
- Metabolic alkalosis with appropriate respiratory compensation
- Acute respiratory alkalosis
- Mixed respiratory and metabolic acidosis
Correct answer: Metabolic alkalosis with appropriate respiratory compensation
Metabolic alkalosis with respiratory compensation is correct. The high pH above 7.45 indicates alkalemia, the elevated bicarbonate above 26 mEq/L identifies a metabolic cause from loss of gastric acid through vomiting, and the slightly elevated PaCO2 reflects compensatory hypoventilation to retain carbon dioxide and blunt the alkalosis. A respiratory alkalosis would instead show a low PaCO2 as the primary driver.
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:
- A normal anion gap, because it proves the cause is respiratory
- An elevated PaO2, because oxygen drives the pH down
- A low bicarbonate, because lost base is the acid driving the low pH
- An elevated PaCO2, because retained carbon dioxide is the acid driving the low pH
Correct answer: An elevated PaCO2, because retained carbon dioxide is the acid driving the low pH
An elevated PaCO2 is the answer. In a respiratory acidosis the lungs fail to clear carbon dioxide, which behaves as an acid, so a rising PaCO2 is the primary driver of the low pH. A metabolic acidosis is instead defined by a low bicarbonate. The anion gap helps subclassify a metabolic acidosis but does not separate respiratory from metabolic causes.
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 will have a high bicarbonate and the opioid patient a low bicarbonate
- Both patients will show an identical high PaCO2
- Both patients will show a primary respiratory alkalosis
- The ketoacidosis patient has a low PaCO2 from compensatory hyperventilation while the opioid patient has a high PaCO2 from hypoventilation
Correct answer: The ketoacidosis patient has a low PaCO2 from compensatory hyperventilation while the opioid patient has a high PaCO2 from hypoventilation
The contrast is that ketoacidosis produces a metabolic acidosis with a compensatory low PaCO2 from Kussmaul hyperventilation, while an opioid overdose produces a respiratory acidosis with a high PaCO2 from hypoventilation. Both share a low pH, but the PaCO2 moves in opposite directions, which is the core of distinguishing a respiratory from a metabolic acidosis at the bedside.
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 oximeter is accurate and rules out significant carbon monoxide exposure
- A standard pulse oximeter cannot distinguish carboxyhemoglobin from oxyhemoglobin, so it falsely reads near normal
- Carbon monoxide lowers the oximeter reading well below the true saturation
- Carbon monoxide has no effect on hemoglobin binding
Correct answer: A standard pulse oximeter cannot distinguish carboxyhemoglobin from oxyhemoglobin, so it falsely reads near normal
A standard pulse oximeter cannot tell carboxyhemoglobin apart from oxyhemoglobin, so it reads falsely reassuring near 99 percent even when much of the hemoglobin is bound to carbon monoxide and cannot carry oxygen. Diagnosis requires a CO-oximeter or co-oximetry measurement of the carboxyhemoglobin level. The nurse should treat based on history and symptoms, not the misleading saturation.
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:
- Works only if given as a nebulized bronchodilator
- Shortens the carboxyhemoglobin half-life from roughly 5 hours on room air to about 60 to 90 minutes
- Lengthens the half-life of carboxyhemoglobin so the body adjusts slowly
- Has no effect on how quickly carbon monoxide is cleared
Correct answer: Shortens the carboxyhemoglobin half-life from roughly 5 hours on room air to about 60 to 90 minutes
High-flow 100 percent oxygen dramatically shortens the carboxyhemoglobin half-life, from roughly 5 hours on room air to about 60 to 90 minutes, by displacing carbon monoxide from hemoglobin. Hyperbaric oxygen shortens it further to around 20 to 25 minutes and is considered for severe cases. Oxygen is the primary antidote, so it is started immediately for any suspected exposure.
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:
- Inhaled albuterol and intravenous antibiotics
- A large normal saline fluid bolus and diuretics
- Immediate needle cricothyrotomy
- Nebulized racemic epinephrine and a dose of dexamethasone
Correct answer: Nebulized racemic epinephrine and a dose of dexamethasone
Nebulized racemic epinephrine with dexamethasone is the answer for croup with stridor at rest. Racemic epinephrine reduces subglottic airway edema for rapid relief, and corticosteroids reduce inflammation and the chance of rebound. Albuterol treats lower-airway bronchospasm, not the upper-airway edema of croup, and antibiotics are not indicated for this viral laryngotracheobronchitis.
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:
- Immediately use a tongue depressor to visualize the epiglottis
- Keep the child calm, avoid examining the throat, and prepare for emergent airway management
- Delay airway specialists until laboratory results return
- Lay the child flat and start aggressive suctioning of the oropharynx
Correct answer: Keep the child calm, avoid examining the throat, and prepare for emergent airway management
Keeping the child calm, avoiding throat examination, and preparing for emergent airway control is correct. In epiglottitis, agitation or instrumentation of the oropharynx can trigger complete laryngospasm and airway obstruction, so the child should stay upright in a position of comfort with a parent. Definitive care involves controlled airway management in the operating room, not bedside throat inspection or forcing the child supine.
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 to reduce airway swelling
- A beta-blocker infusion to slow the heart rate
- Nebulized magnesium sulfate as the standard of care
- Intravenous magnesium sulfate as a single infusion
Correct answer: Intravenous magnesium sulfate as a single infusion
Intravenous magnesium sulfate is the recognized adjunct for a severe asthma exacerbation not responding to first-line bronchodilators and steroids; it promotes smooth muscle relaxation and may reduce admissions. Current guidance favors the intravenous route over nebulized magnesium. Beta-blockers can worsen bronchospasm and are avoided, and furosemide treats fluid overload, not airway inflammation.
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:
- A normal variation requiring no intervention
- Mild, appropriate for discharge after a single treatment
- Moderate, requiring only an oral steroid taper
- Severe, warranting aggressive continuous bronchodilators and close monitoring for respiratory failure
Correct answer: Severe, warranting aggressive continuous bronchodilators and close monitoring for respiratory failure
A peak flow at 35 percent of personal best with single-word speech and accessory muscle use marks a severe exacerbation. Severity grading combines peak flow, speech, work of breathing, and oxygenation; severe cases need continuous bronchodilators, systemic steroids, and vigilant monitoring for impending respiratory failure. A mild exacerbation would show a peak flow above 70 percent with full sentences and minimal distress.
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?
- Ketamine
- Propofol alone for its bronchoconstrictive effect
- Succinylcholine as the sedative
- A nondepolarizing paralytic used as the only agent
Correct answer: Ketamine
Ketamine is favored in status asthmaticus because it provides sedation while also producing bronchodilation, which is helpful when intubating a severely obstructed asthmatic. Succinylcholine and nondepolarizing agents are paralytics, not sedatives, and provide no bronchodilation. Recognizing ketamine's airway benefit helps the nurse prepare the right medications for a difficult asthma intubation.
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:
- Decrease the expiratory time on the ventilator
- Administer a rapid intravenous fluid restriction
- Briefly disconnect the patient from the ventilator to allow full exhalation and relieve trapped air
- Increase the respiratory rate to push more breaths in
Correct answer: Briefly disconnect the patient from the ventilator to allow full exhalation and relieve trapped air
Briefly disconnecting the ventilator circuit allows trapped air to escape and relieves dynamic hyperinflation, or breath stacking, which can cause high pressures, barotrauma, and hypotension in the intubated asthmatic. Increasing the rate or shortening expiration worsens air trapping. The ventilator strategy uses a slower rate with a longer expiratory time and permissive hypercapnia.
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:
- 100 percent at all times to maximize oxygen delivery
- Exactly 94 percent with no acceptable range
- 88 to 92 percent, to avoid suppressing respiratory drive and worsening hypercapnia
- Below 80 percent to stimulate breathing
Correct answer: 88 to 92 percent, to avoid suppressing respiratory drive and worsening hypercapnia
A target of 88 to 92 percent is recommended in COPD because excessive oxygen can blunt the hypoxic respiratory drive and worsen ventilation-perfusion matching, raising carbon dioxide and risking narcosis. Driving the saturation to 100 percent is harmful in chronic carbon dioxide retainers. The nurse should titrate oxygen down toward the target while monitoring mental status and blood gases.
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:
- Prepare for endotracheal intubation because noninvasive ventilation has failed
- Administer a sedative to keep the mask in place
- Continue noninvasive ventilation indefinitely despite the declining mental status
- Remove all oxygen support to stimulate breathing
Correct answer: Prepare for endotracheal intubation because noninvasive ventilation has failed
Preparing for endotracheal intubation is correct because a declining level of consciousness, loss of airway protection, and a worsening respiratory acidosis are signs that noninvasive ventilation has failed. Sedating an obtunded patient to tolerate the mask is dangerous, and removing oxygen would worsen hypoxia. Timely escalation to invasive ventilation prevents respiratory arrest.
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:
- A simple uncomplicated pneumothorax
- Acute respiratory distress syndrome from noncardiogenic pulmonary edema
- Acute cardiogenic pulmonary edema from left heart failure
- An acute asthma exacerbation
Correct answer: Acute respiratory distress syndrome from noncardiogenic pulmonary edema
Acute respiratory distress syndrome is correct. Bilateral infiltrates with severe hypoxemia and a normal heart size, not explained by cardiac failure or volume overload, describe noncardiogenic pulmonary edema characteristic of ARDS, here triggered by aspiration during near-drowning. Cardiogenic edema would show cardiomegaly and signs of fluid overload, and a pneumothorax produces unilateral findings.
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:
- Severe ARDS, because the ratio is above 300
- Moderate ARDS, because the ratio falls between 100 and 200
- No ARDS, because oxygenation is normal
- Mild ARDS, because the ratio is above 300
Correct answer: Moderate ARDS, because the ratio falls between 100 and 200
Moderate ARDS is correct. Dividing the PaO2 of 90 by the FiO2 of 0.6 gives a ratio of 150, which by the Berlin definition falls in the moderate range above 100 and up to 200. Mild ARDS is a ratio above 200 up to 300, and severe is a ratio of 100 or less. The lower the ratio, the worse the oxygenation and the higher the mortality.
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?
- Low tidal volumes of about 6 milliliters per kilogram of predicted body weight
- The highest possible plateau pressures to recruit lung units
- High tidal volumes of about 12 milliliters per kilogram to fully expand the lungs
- Zero positive end-expiratory pressure to rest the alveoli
Correct answer: Low tidal volumes of about 6 milliliters per kilogram of predicted body weight
Low tidal volumes of roughly 6 milliliters per kilogram of predicted body weight are the cornerstone of lung-protective ventilation in ARDS, limiting overdistension and plateau pressures to reduce ventilator-induced injury. High tidal volumes and high plateau pressures worsen barotrauma. Positive end-expiratory pressure is used, not eliminated, to keep alveoli open and improve oxygenation.
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:
- A racemic epinephrine nebulizer and antibiotics
- Immediate chest tube placement
- Noninvasive positive pressure ventilation, intravenous nitroglycerin, and a loop diuretic
- Aggressive intravenous fluid boluses and bronchodilators
Correct answer: Noninvasive positive pressure ventilation, intravenous nitroglycerin, and a loop diuretic
Noninvasive positive pressure ventilation with intravenous nitroglycerin and a loop diuretic targets cardiogenic pulmonary edema: positive pressure improves oxygenation and reduces work of breathing, nitroglycerin reduces preload and afterload, and a diuretic removes excess fluid. Fluid boluses would worsen the congestion, and chest tubes or racemic epinephrine address unrelated problems.
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:
- Cardiac tamponade
- Massive hemothorax
- Simple rib fracture
- Tension pneumothorax
Correct answer: Massive hemothorax
Massive hemothorax is correct. Blood filling the pleural space produces dullness to percussion and decreased breath sounds, and the associated blood loss causes hypotension with flat, not distended, neck veins. A tension pneumothorax instead causes hyperresonance and distended neck veins, and cardiac tamponade produces muffled heart sounds. The percussion note and neck vein findings distinguish these life-threatening chest injuries.
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 and posterior in the pleural space, around the fifth intercostal space at the midaxillary line
- Directly through the sternum
- High and anterior at the second intercostal space midclavicular line
- Below the diaphragm in the upper abdomen
Correct answer: Low and posterior in the pleural space, around the fifth intercostal space at the midaxillary line
A chest tube for a hemothorax is placed low and posterior, typically around the fifth intercostal space at the midaxillary line, because blood settles in the dependent portion of the pleural space and drains best from there. An apical anterior position is used to evacuate air in a pneumothorax. The tube is always inserted over the top of the rib to avoid the neurovascular bundle.
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:
- A standard catheter is more likely to reach the pleural space because the chest wall is thinner there
- It is closer to the heart, allowing direct cardiac access
- It avoids the lungs entirely
- It is the only site that does not require sterile technique
Correct answer: A standard catheter is more likely to reach the pleural space because the chest wall is thinner there
The lateral fifth intercostal space anterior axillary line is favored because the chest wall is generally thinner there, so a standard-length catheter is more likely to actually penetrate the pleural space and decompress the tension, reducing the high failure rate seen at the thicker anterior second intercostal space. The choice is about reaching the pleural space reliably, not about cardiac access or skipping sterile technique.
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:
- A 12-lead electrocardiogram alone
- A peak expiratory flow measurement
- Computed tomography pulmonary angiography
- A plain chest x-ray alone
Correct answer: Computed tomography pulmonary angiography
Computed tomography pulmonary angiography is the definitive imaging study used to confirm most pulmonary emboli, directly visualizing clot in the pulmonary arteries. A chest x-ray is often normal or nonspecific, and the electrocardiogram supports but does not confirm the diagnosis. A ventilation-perfusion scan is an alternative when CT is contraindicated, such as in renal impairment or contrast allergy.
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 and anticoagulation should begin
- The patient must still receive thrombolytics
- A normal D-dimer is irrelevant to the workup
- Pulmonary embolism is effectively excluded, so CT angiography can be avoided
Correct answer: Pulmonary embolism is effectively excluded, so CT angiography can be avoided
In a patient with low pretest probability, a negative D-dimer effectively excludes pulmonary embolism and avoids the radiation and contrast of CT angiography, because the test has high sensitivity and a strong negative predictive value in low-risk patients. A negative D-dimer does not confirm PE and does not warrant treatment. In high pretest probability, imaging is pursued regardless of the D-dimer.
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:
- A prophylactic dose of subcutaneous heparin only
- Oral aspirin alone
- Observation without anticoagulation
- Systemic thrombolytic therapy to dissolve the clot
Correct answer: Systemic thrombolytic therapy to dissolve the clot
Systemic thrombolytic therapy is the definitive treatment for a massive, high-risk pulmonary embolism causing hemodynamic instability, because rapidly dissolving the clot relieves the right ventricular obstruction and shock. Catheter-directed therapy or embolectomy are alternatives. Prophylactic-dose heparin or aspirin alone is inadequate for a hemodynamically unstable PE, where reperfusion is the goal.
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:
- Perform a blind finger sweep first
- Encourage the patient to keep coughing forcefully
- Lay the patient supine and start chest compressions immediately
- Perform abdominal thrusts until the object is expelled or the patient becomes unresponsive
Correct answer: Perform abdominal thrusts until the object is expelled or the patient becomes unresponsive
Abdominal thrusts are the immediate intervention for a conscious adult with complete airway obstruction who cannot speak, cough, or breathe, using upward thrusts to expel the object. Encouraging coughing is appropriate only for a partial obstruction with effective air movement. Blind finger sweeps risk pushing the object deeper, and if the patient becomes unresponsive the nurse begins CPR, checking the mouth for the object before ventilations.
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
- Cushing's triad
- Charcot's triad
- Beck's triad
Correct answer: Cushing's triad
Cushing's triad is the combination of hypertension with a widening pulse pressure, bradycardia, and irregular respirations. It is a late and ominous sign of dangerously elevated intracranial pressure that signals impending brainstem herniation, so the emergency nurse must escalate care immediately. Beck's triad (hypotension, muffled heart tones, jugular venous distention) points to cardiac tamponade, Charcot's triad describes ascending cholangitis, and Virchow's triad describes risk factors for venous thrombosis.
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 risk of post-stroke depression
- The likelihood that the stroke is hemorrhagic rather than ischemic
- The severity of neurological deficit from the stroke
- The patient's eligibility for surgical clot retrieval based on imaging
Correct answer: The severity of neurological deficit from the stroke
The NIH Stroke Scale quantifies the severity of neurological deficit caused by a stroke. The 15-item scale scores domains such as level of consciousness, gaze, visual fields, facial palsy, motor strength, ataxia, sensation, language, dysarthria, and inattention, with higher totals indicating more severe deficits; it guides treatment decisions and tracks change over time. It does not determine whether bleeding is present (that requires imaging), does not by itself confirm thrombectomy candidacy, and does not measure mood disorders.
A higher total score on the National Institutes of Health Stroke Scale (NIHSS) generally indicates which of the following?
- A more severe stroke with greater neurological impairment
- A milder stroke with a better prognosis
- A transient ischemic attack rather than a stroke
- A completed stroke that no longer requires intervention
Correct answer: A more severe stroke with greater neurological impairment
A higher NIHSS total indicates a more severe stroke with greater neurological impairment. Scores range from 0 (no deficit) to 42, with larger numbers reflecting more extensive impairment and generally a worse prognosis; this is why the score helps stratify severity and informs decisions about thrombolysis and thrombectomy. A low score reflects milder deficits, and the scale does not distinguish a completed stroke or a transient ischemic attack from an evolving one.
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 Coma Scale
- Ranchos Los Amigos scale
- Cincinnati Prehospital Stroke Scale
- Hunt and Hess scale
Correct answer: Cincinnati Prehospital Stroke Scale
The Cincinnati Prehospital Stroke Scale assesses three components: facial droop, arm drift, and speech abnormalities. An abnormal finding in any one of the three suggests stroke and prompts rapid transport, making it a fast field screen. The Glasgow Coma Scale measures level of consciousness, the Hunt and Hess scale grades subarachnoid hemorrhage severity, and the Ranchos Los Amigos scale describes 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?
- Arm drift
- Speech
- Facial droop
- Visual fields
Correct answer: Arm drift
A drifting arm is an abnormal result in the arm-drift component of the Cincinnati Prehospital Stroke Scale. With eyes closed and arms extended palms up, a stroke patient may have one arm drift down or fall, indicating unilateral motor weakness. Facial droop tests for uneven smile, the speech component tests for slurred or incorrect speech, and visual fields are not part of this particular three-item prehospital scale.
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?
- A vasovagal episode
- Resolving cerebral edema
- Increasing intracranial pressure with early herniation
- An uncomplicated concussion
Correct answer: Increasing intracranial pressure with early herniation
Increasing intracranial pressure with early herniation is the best fit for a decreasing level of consciousness, a dilating sluggish pupil, hypertension with widening pulse pressure, and bradycardia. These are classic signs of increased intracranial pressure and the Cushing response, and the emergency nurse should anticipate measures such as head-of-bed elevation, normocarbia, and osmotic therapy. Resolving edema and an uncomplicated concussion would not produce a blown pupil and Cushing response, and a vasovagal episode causes hypotension and bradycardia, not hypertension.
Which set of findings would the emergency nurse most likely associate with increasing intracranial pressure in an adult?
- Headache, vomiting, decreasing level of consciousness, and a unilateral fixed pupil
- Hyperactivity, pinpoint pupils, and hypothermia
- Bilateral hand tremor and warm flushed skin
- Hypotension, tachycardia, and rapid shallow breathing
Correct answer: Headache, vomiting, decreasing level of consciousness, and a unilateral fixed pupil
Headache, vomiting, a decreasing level of consciousness, and a unilateral fixed and dilated pupil are hallmark signs of increasing intracranial pressure. As pressure rises, perfusion falls and the third cranial nerve becomes compressed, producing the pupillary change, while the Cushing response later brings hypertension and bradycardia. Hypotension with tachycardia suggests shock, while pinpoint pupils with hypothermia or tremor with flushed skin describe toxidromes or unrelated findings rather than rising intracranial pressure.
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?
- Tension headache; provide acetaminophen and reassurance
- Bacterial meningitis; initiate droplet precautions and prepare for early empiric antibiotics
- Viral gastroenteritis; begin oral rehydration
- Migraine; administer a triptan and discharge
Correct answer: Bacterial meningitis; initiate droplet precautions and prepare for early empiric antibiotics
Bacterial meningitis is the concern, and the emergency nurse should institute droplet precautions and expedite empiric antibiotics. Fever, severe headache, photophobia, nuchal rigidity, and a petechial or purpuric rash are classic bacterial meningitis signs and symptoms, and the rash raises concern for meningococcal disease; delays in antibiotics worsen outcomes, so treatment should not wait for lumbar puncture results. The other choices describe benign or unrelated conditions that do not explain the meningeal and infectious findings.
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 sign
- Battle's sign
- Homans' sign
- Brudzinski's sign
Correct answer: Brudzinski's sign
Brudzinski's sign is positive when passive flexion of the neck causes involuntary flexion of the hips and knees, reflecting meningeal irritation. It is one of the classic bedside signs of meningitis along with Kernig's sign, which is pain or resistance when the hip is flexed and the knee is then extended. Homans' sign relates to deep vein thrombosis, and Battle's sign is mastoid bruising suggesting basilar skull fracture.
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?
- 15
- 11
- 9
- 13
Correct answer: 13
This patient scores 13 on the Glasgow Coma Scale: eye opening to voice (3), confused verbal response (4), and localizing to pain (6), which sum to 13. Correct interpretation requires scoring each of the three components and adding them, with totals ranging from 3 to 15. The other totals would reflect different combinations and would not match the described responses.
When interpreting the Glasgow Coma Scale, a total score of 8 or less is generally understood to indicate which of the following?
- An isolated speech disorder
- Mild brain injury requiring only observation
- A severe impairment in consciousness, often prompting consideration of a definitive airway
- Normal neurological function
Correct answer: A severe impairment in consciousness, often prompting consideration of a definitive airway
A Glasgow Coma Scale total of 8 or less indicates severe impairment of consciousness and is the traditional threshold prompting consideration of a definitive airway, because such patients often cannot protect their airway. Interpretation places 13 to 15 in the mild range, 9 to 12 as moderate, and 8 or less as severe. A low score does not indicate normal function and is not specific to a speech disorder.
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 the exact vascular territory involved
- Measure the patient's blood glucose
- Distinguish hemorrhagic stroke from ischemic stroke
- Grade the patient's level of consciousness
Correct answer: Distinguish hemorrhagic stroke from ischemic stroke
The first non-contrast head CT is performed primarily to distinguish hemorrhagic stroke from ischemic stroke. Thrombolytics are appropriate only for ischemic stroke and are dangerous in hemorrhage, so excluding bleeding is essential before treatment; this is the key difference between ischemic vs hemorrhagic stroke management. CT does not reliably pinpoint the exact territory acutely, glucose is checked by point-of-care testing, and level of consciousness is graded clinically.
Which clinical pattern most strongly favors a hemorrhagic stroke over an ischemic stroke at initial presentation?
- Gradual painless onset of an isolated arm weakness on awakening
- A brief deficit that fully resolves within thirty minutes
- Painless transient monocular vision loss
- Sudden severe headache, vomiting, and rapidly decreasing level of consciousness
Correct answer: Sudden severe headache, vomiting, and rapidly decreasing level of consciousness
A sudden severe headache with vomiting and a rapidly decreasing level of consciousness most strongly favors a hemorrhagic stroke. Bleeding raises intracranial pressure quickly, producing prominent headache, nausea, and depressed consciousness, whereas ischemic strokes more often present with focal deficits and less dramatic headache. A fully resolving deficit suggests a transient ischemic attack, and transient monocular vision loss suggests amaurosis fugax, neither of which indicates hemorrhage.
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?
- Administer oral phenytoin
- Administer a second-line agent such as IV levetiracetam, fosphenytoin, or valproate
- Withhold all further medication and observe
- Repeat the same benzodiazepine indefinitely until the seizure stops
Correct answer: Administer a second-line agent such as IV levetiracetam, fosphenytoin, or valproate
When status epilepticus persists after an adequately dosed benzodiazepine, the next step is a second-line intravenous agent such as levetiracetam, fosphenytoin, or valproate. Benzodiazepines are first-line, but indefinite repetition risks respiratory depression without controlling refractory seizures, so the algorithm advances to a loading-dose anticonvulsant. Withholding medication allows ongoing neuronal injury, and oral phenytoin is inappropriate during active convulsions because absorption is unreliable and too slow.
For an adult in status epilepticus with intravenous access, which medication and dosing best reflects the recommended first-line therapy?
- Oral diazepam 10 mg
- IV lorazepam 0.1 mg/kg, up to a maximum of about 4 mg
- IV levetiracetam 60 mg/kg as the initial agent
- IV mannitol 1 g/kg
Correct answer: IV lorazepam 0.1 mg/kg, up to a maximum of about 4 mg
Intravenous lorazepam dosed at about 0.1 mg/kg, up to a maximum near 4 mg, is the recommended first-line therapy when IV access is available. Benzodiazepines such as lorazepam are first-line for status epilepticus management because they rapidly terminate seizure activity. Levetiracetam 60 mg/kg is a second-line loading agent rather than the first drug, oral diazepam is too slow for active convulsions, and mannitol treats elevated intracranial pressure, not seizures.
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?
- Blood pressure of 168/92 mmHg that responds to treatment
- Active internal bleeding or a history of recent intracranial hemorrhage
- Age of 70 years
- A blood glucose of 140 mg/dL
Correct answer: Active internal bleeding or a history of recent intracranial hemorrhage
Active internal bleeding or a recent intracranial hemorrhage is an absolute contraindication to thrombolysis because the drug would dramatically increase the risk of catastrophic bleeding. Reviewing tPA contraindications is part of the rapid stroke workup. A blood pressure that can be lowered to a safe range before treatment, advanced age alone, and a normal glucose are not absolute contraindications.
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
- 160/100 mmHg
- 220/120 mmHg
- 185/110 mmHg
Correct answer: 185/110 mmHg
A sustained blood pressure above approximately 185/110 mmHg is a contraindication to thrombolysis unless it can be safely reduced below that level first, because higher pressures raise the risk of symptomatic intracerebral hemorrhage. This blood pressure ceiling is one of the most frequently checked tPA contraindications in stroke care. The lower values listed do not exceed the threshold, and 220/120 mmHg far exceeds it but is not the defining cutoff for thrombolysis eligibility.
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?
- Reteplase two 10-unit boluses
- Tenecteplase 0.25 mg/kg (maximum 25 mg) as a single bolus
- Streptokinase 1.5 million units infused over one hour
- Urokinase 4,400 units/kg bolus
Correct answer: Tenecteplase 0.25 mg/kg (maximum 25 mg) as a single bolus
Tenecteplase 0.25 mg/kg, up to a maximum of 25 mg, given as a single intravenous bolus carries a Class 1 recommendation alongside alteplase for eligible patients within 4.5 hours under the current AHA/ASA stroke guideline, and its single-bolus administration leads many systems to prefer it for time-critical care. The guideline endorses either tenecteplase 0.25 mg/kg or alteplase 0.9 mg/kg rather than mandating one over the other. Streptokinase is not used for acute ischemic stroke because of bleeding risk, and reteplase and urokinase are not guideline-endorsed agents for this indication.
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 prolonged hyperventilation to a PaCO2 near 20 mmHg
- Brief, controlled mild hyperventilation only as a temporizing measure while definitive therapy is arranged
- Permissive hypercapnia with a PaCO2 of 60 mmHg
- Apneic oxygenation without ventilation
Correct answer: Brief, controlled mild hyperventilation only as a temporizing measure while definitive therapy is arranged
Brief, controlled mild hyperventilation used only as a temporizing measure for impending herniation is the appropriate target. Lowering PaCO2 causes cerebral vasoconstriction that transiently reduces intracranial pressure, but aggressive or prolonged hyperventilation to very low PaCO2 can cause ischemia from excessive vasoconstriction, so it is avoided. Permissive hypercapnia raises intracranial pressure, and apneic oxygenation does not control PaCO2.
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?
- Place the patient supine with the head of the bed flat for the rest of the visit
- Treat the hypoglycemia and reassess the neurological deficits
- Obtain consent for thrombectomy
- Administer the thrombolytic without delay
Correct answer: Treat the hypoglycemia and reassess the neurological deficits
Treating the hypoglycemia and reassessing the neurological deficits is the immediate priority. Severe hypoglycemia is a well-known stroke mimic that can fully reproduce focal deficits, so correcting glucose may resolve the findings and avoid unnecessary thrombolysis; checking and correcting glucose is a required step before stroke-specific treatment. Giving a thrombolytic or pursuing thrombectomy before excluding a mimic could harm the patient, and a permanently flat head position is not indicated.
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 temporal bone fracture
- The optic nerve from globe trauma
- The oculomotor (third cranial) nerve from uncal herniation
- The vagus nerve from carotid injury
Correct answer: The oculomotor (third cranial) nerve from uncal herniation
A unilateral fixed and dilated pupil after head injury most likely reflects compression of the oculomotor (third cranial) nerve from uncal herniation as rising intracranial pressure pushes the temporal lobe against the brainstem. This is an emergent sign of increased intracranial pressure that demands immediate intervention. Optic nerve injury affects vision rather than producing a blown pupil in this pattern, and the facial and vagus nerves do not control pupil size.
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?
- Murphy's point
- McBurney's point
- Cullen's point
- Rovsing's point
Correct answer: McBurney's point
McBurney's point is the classic site of maximal tenderness in acute appendicitis, located about one-third of the distance from the right anterior superior iliac spine to the umbilicus. Pain that begins as vague periumbilical discomfort and then localizes to McBurney's point reflects progression from visceral to parietal peritoneal irritation as the inflamed appendix contacts the abdominal wall. Murphy's point relates to the gallbladder, not the appendix.
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
- Positive Kehr's sign
- Positive Murphy's sign
- Positive Rovsing's sign
Correct answer: Positive Rovsing's sign
A positive Rovsing's sign is referred right-lower-quadrant pain elicited by palpating the left lower quadrant, and it supports a diagnosis of appendicitis by demonstrating localized peritoneal irritation around the appendix. Murphy's sign indicates gallbladder inflammation, and Kehr's sign is referred shoulder pain from diaphragmatic irritation, neither of which is produced by left-sided palpation in appendicitis.
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?
- Octreotide
- Pantoprazole bolus only
- Metoclopramide
- Ondansetron
Correct answer: Octreotide
Octreotide is the vasoactive agent of choice for acute esophageal variceal bleeding; given as a continuous infusion, it causes splanchnic vasoconstriction that lowers portal pressure and slows hemorrhage until definitive endoscopic band ligation can be performed. Metoclopramide and ondansetron treat nausea but do not control variceal bleeding, and a proton pump inhibitor alone does not address the variceal source.
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?
- Administration of oral lactulose
- Balloon tamponade with a Sengstaken-Blakemore tube
- Immediate transfusion of fresh frozen plasma alone
- Insertion of a nasogastric tube to low intermittent suction
Correct answer: Balloon tamponade with a Sengstaken-Blakemore tube
Balloon tamponade with a Sengstaken-Blakemore (or Minnesota) tube applies direct pressure to bleeding esophageal and gastric varices and is a life-saving temporizing measure when endoscopic band ligation or sclerotherapy is unavailable or has failed. Lactulose treats hepatic encephalopathy, not active bleeding, and plasma or NG suction alone will not tamponade a torrential variceal hemorrhage.
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?
- McBurney's sign, indicating appendiceal rupture
- Grey Turner's sign, indicating flank hemorrhage
- Murphy's sign, indicating gallbladder inflammation
- Cullen's sign, indicating retroperitoneal or intra-abdominal hemorrhage
Correct answer: Cullen's sign, indicating retroperitoneal or intra-abdominal hemorrhage
Cullen's sign is periumbilical ecchymosis caused by blood tracking to the subcutaneous tissue around the umbilicus, and in the setting of severe pancreatitis it signals retroperitoneal hemorrhage and a worse prognosis. Grey Turner's sign refers specifically to flank bruising; both findings take 24 to 48 hours to develop and are seen in fewer than one percent of pancreatitis cases.
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?
- Acute cholecystitis
- Portal hypertension
- Bowel ischemia
- Retroperitoneal hemorrhage
Correct answer: Retroperitoneal hemorrhage
Grey Turner's sign is flank ecchymosis produced when retroperitoneal blood from hemorrhagic pancreatitis dissects along fascial planes into the subcutaneous tissue of the flanks. It is an ominous finding correlating with severe necrotizing or hemorrhagic pancreatitis and increased mortality, and it is unrelated to gallbladder inflammation or portal hypertension.
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?
- Hemorrhoidal bleeding
- A Meckel's diverticulum in the distal ileum
- An upper GI bleed proximal to the ligament of Treitz
- A lower GI bleed in the sigmoid colon
Correct answer: An upper GI bleed proximal to the ligament of Treitz
An upper GI bleed, arising proximal to the ligament of Treitz, classically produces hematemesis and melena; the black tarry stool results from blood being digested during transit through the GI tract. Lower GI bleeds and hemorrhoids typically cause hematochezia (bright red blood per rectum) without hematemesis, which is why the combination here points to an upper source.
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?
- Coffee-ground emesis
- Melena with an elevated BUN-to-creatinine ratio
- Bright red blood per rectum (hematochezia) without hematemesis
- A history of NSAID use with epigastric pain
Correct answer: Bright red blood per rectum (hematochezia) without hematemesis
Bright red blood per rectum without hematemesis most strongly suggests a lower GI bleed distal to the ligament of Treitz, where blood exits before it can be digested into melena. Coffee-ground emesis, melena with an elevated BUN-to-creatinine ratio, and NSAID-related epigastric pain all point toward an upper GI source, since digested blood raises BUN and upper bleeds present with emesis findings.
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 appendicitis
- Positive McBurney's sign, supporting peritonitis
- Positive Kehr's sign, supporting splenic rupture
Correct answer: Positive Murphy's sign, supporting acute cholecystitis
A positive Murphy's sign is inspiratory arrest on palpation of the right upper quadrant, occurring because the inflamed gallbladder descends and contacts the examiner's hand, and it strongly supports acute cholecystitis. Rovsing's and McBurney's findings relate to appendicitis, and Kehr's sign reflects diaphragmatic irritation from splenic injury.
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:
- Serum lipase
- Serum amylase alone
- Total bilirubin
- Alkaline phosphatase
Correct answer: Serum lipase
Serum lipase is the most sensitive and specific laboratory marker for acute pancreatitis, remaining elevated longer than amylase and being less affected by other conditions. A lipase elevated to at least three times the upper limit of normal, with characteristic pain, supports the diagnosis; amylase alone is less specific, and bilirubin and alkaline phosphatase reflect biliary obstruction rather than confirming pancreatitis.
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
- Hypocalcemia
- Hyperkalemia
- Hypochloremia
Correct answer: Hypocalcemia
Hypocalcemia is a recognized complication of acute pancreatitis, occurring as calcium is consumed in areas of fat necrosis (saponification); it can cause tetany, Chvostek and Trousseau signs, and QT prolongation with dysrhythmias. The emergency nurse should monitor ionized calcium and ECG, as the other electrolyte shifts are not the characteristic life-threatening complication of pancreatitis.
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?
- Generalized peritonitis
- Early appendicitis
- Uncomplicated gastroenteritis
- Biliary colic
Correct answer: Generalized peritonitis
A rigid, board-like abdomen with rebound tenderness, involuntary guarding, and absent bowel sounds is the classic presentation of generalized peritonitis, reflecting widespread inflammation of the peritoneum often from a perforated viscus. Gastroenteritis and biliary colic do not cause board-like rigidity, and early appendicitis produces localized rather than diffuse peritoneal signs.
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:
- Acute appendicitis
- Esophageal varices
- Cholecystitis
- Acute diverticulitis
Correct answer: Acute diverticulitis
Acute diverticulitis classically presents with left lower quadrant pain, fever, and sometimes a palpable tender mass, because diverticula are most common in the sigmoid colon on the left side. Appendicitis produces right-sided pain, cholecystitis causes right upper quadrant pain, and esophageal varices present with bleeding rather than localized LLQ tenderness.
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?
- Administer a bulk-forming laxative
- Apply a heating pad to the abdomen
- Insert a nasogastric tube connected to suction
- Encourage oral intake of clear fluids
Correct answer: Insert a nasogastric tube connected to suction
Inserting a nasogastric tube to suction is the priority for bowel obstruction; it decompresses the GI tract proximal to the obstruction, relieves distention and vomiting, and reduces the risk of aspiration and perforation. Oral fluids and laxatives are contraindicated in obstruction, and a heating pad does not address the mechanical problem.
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:
- Improving hydration status
- Resolution of the obstruction
- Progression toward bowel ischemia or strangulation
- Normal peristalsis returning
Correct answer: Progression toward bowel ischemia or strangulation
High-pitched tinkling sounds occur early in a mechanical bowel obstruction as the bowel works against the blockage; their disappearance with worsening distention suggests the bowel is becoming ischemic or strangulated, a surgical emergency. This deterioration signals decreased viability rather than resolution or normal peristalsis, so the emergency nurse should escalate care immediately.
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
- Pyloric stenosis
- Cyclic vomiting syndrome
- Intussusception
Correct answer: Intussusception
Intussusception is the telescoping of one segment of bowel into another, classically seen in young children with paroxysmal colicky pain, currant-jelly (blood and mucus) stools, and a palpable sausage-shaped abdominal mass. Pyloric stenosis presents in younger infants with projectile non-bilious vomiting and an olive-shaped mass, and appendicitis does not produce currant-jelly stools.
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?
- Octreotide
- Lactulose
- Pantoprazole
- Vitamin K
Correct answer: Lactulose
Lactulose is the first-line treatment for hepatic encephalopathy; it acidifies the colon to trap ammonia as ammonium for excretion, lowering serum ammonia that causes confusion and asterixis. Vitamin K addresses coagulopathy, octreotide treats variceal bleeding, and a proton pump inhibitor protects the gastric mucosa, none of which directly reverse encephalopathy.
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?
- Spontaneous bacterial peritonitis
- Esophageal varices
- Acute cholecystitis
- Bowel intussusception
Correct answer: Spontaneous bacterial peritonitis
Spontaneous bacterial peritonitis is infection of ascitic fluid in cirrhotic patients and presents with fever, abdominal pain, and worsening encephalopathy; diagnostic paracentesis with ascitic fluid analysis (an absolute neutrophil count of 250 cells/mm3 or higher) confirms it. Varices cause bleeding rather than peritonitis, and the paracentesis is specifically aimed at identifying infected ascites.
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?
- Administer oral iron supplements
- Establish two large-bore IVs and begin fluid resuscitation
- Obtain a stool guaiac test
- Schedule an outpatient colonoscopy
Correct answer: Establish two large-bore IVs and begin fluid resuscitation
Establishing two large-bore IV catheters and initiating volume resuscitation is the immediate priority for a GI bleed patient showing signs of hemorrhagic shock (tachycardia, hypotension, pallor). Restoring circulating volume and preparing for blood products stabilizes the patient, whereas a guaiac test, oral iron, or outpatient scheduling do nothing to address acute hypovolemia.
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 anal fissure
- A bleeding peptic ulcer
- Diverticulitis of the sigmoid colon
- Internal hemorrhoids
Correct answer: A bleeding peptic ulcer
A bleeding peptic ulcer is the most likely source given chronic NSAID use, epigastric pain, and coffee-ground emesis; NSAIDs impair the protective gastric mucosal barrier and promote ulceration in the stomach and duodenum. Coffee-ground emesis reflects an upper GI source, whereas hemorrhoids, diverticulitis, and anal fissures cause lower GI bleeding without hematemesis.
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:
- A button battery
- A plastic bead
- Food bolus impaction
- A single coin
Correct answer: A button battery
A double-ring or halo sign on radiograph distinguishes a button (disk) battery from a coin, and a lodged button battery is a true emergency requiring urgent endoscopic removal because it can cause caustic mucosal injury and esophageal perforation within hours. A simple coin lacks the halo sign and is less time-critical, making rapid identification essential.
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:
- Resolution of symptoms after sips of water
- Mild intermittent heartburn
- A normal ability to swallow liquids
- Inability to manage secretions, indicating complete obstruction and aspiration risk
Correct answer: Inability to manage secretions, indicating complete obstruction and aspiration risk
An esophageal food bolus impaction that causes inability to handle oral secretions (drooling) indicates complete or near-complete obstruction and a high aspiration risk, warranting urgent endoscopic intervention. When the patient can still swallow liquids or the bolus passes with water, the situation is less emergent, so the airway and secretion management findings drive urgency.
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
- Bowel obstruction
- Ascites
- Hepatomegaly
Correct answer: Ascites
Ascites is the pathologic accumulation of fluid in the peritoneal cavity, demonstrated on exam by a fluid wave and shifting dullness, and in cirrhosis it results from portal hypertension and low albumin. Peritonitis is inflammation of the peritoneum, hepatomegaly is liver enlargement, and bowel obstruction causes gas-filled distention rather than a fluid wave.
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:
- Administer oral analgesics and discharge with follow-up
- Apply an abdominal binder and observe overnight
- Order a barium swallow study
- Prepare for fluid resuscitation and emergent surgical evaluation for intra-abdominal hemorrhage
Correct answer: Prepare for fluid resuscitation and emergent surgical evaluation for intra-abdominal hemorrhage
Increasing distention, rigidity, and hypotension after blunt abdominal trauma suggest intra-abdominal hemorrhage or hollow viscus injury, so the priority is volume resuscitation and emergent surgical evaluation. Delaying with oral analgesics, a binder, or a barium study risks exsanguination, since a deteriorating trauma abdomen is a surgical emergency.
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, often through contaminated food or water
- Respiratory droplets
- Bloodborne exposure such as needlestick
- Sexual contact only
Correct answer: Fecal-oral, often through contaminated food or water
Hepatitis A is transmitted primarily by the fecal-oral route, frequently through contaminated food or water, which is why outbreaks are linked to food handlers and shellfish. This contrasts with hepatitis B and C, which are bloodborne and can be sexually transmitted, so the emergency nurse emphasizes hand hygiene and food safety for hepatitis A prevention.
A patient with acute pancreatitis is at risk for which serious pulmonary complication that the emergency nurse should monitor for with continuous pulse oximetry?
- Pulmonary fibrosis
- Acute respiratory distress syndrome (ARDS)
- Spontaneous pneumothorax
- Asthma exacerbation
Correct answer: Acute respiratory distress syndrome (ARDS)
Acute respiratory distress syndrome is a recognized systemic complication of severe acute pancreatitis, driven by the inflammatory cascade and capillary leak that injure the alveolar-capillary membrane. The emergency nurse monitors oxygenation closely because worsening hypoxemia signals this life-threatening complication, which is far more characteristic of pancreatitis than spontaneous pneumothorax or fibrosis.
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:
- Cholelithiasis
- Mechanical bowel obstruction
- Acute appendicitis
- Hepatitis
Correct answer: Mechanical bowel obstruction
Multiple dilated loops of bowel with air-fluid levels on an upright or lateral radiograph, combined with obstipation (no passage of stool or flatus) and crampy pain, is the classic picture of a mechanical bowel obstruction. Appendicitis, hepatitis, and gallstones do not produce this characteristic ladder of air-fluid levels.
A patient is suspected of having appendicitis. To minimize the risk of perforation, the emergency nurse should AVOID which intervention before surgical evaluation?
- Administering ordered antibiotics
- Establishing IV access
- Maintaining NPO status
- Applying heat to the abdomen
Correct answer: Applying heat to the abdomen
Applying heat to the abdomen should be avoided in suspected appendicitis because heat increases circulation and inflammation and may hasten rupture of the appendix. Keeping the patient NPO, establishing IV access, and giving ordered antibiotics are appropriate, so the emergency nurse withholds heat to reduce perforation risk.
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:
- Peptic ulcer disease
- Acute appendicitis
- Bowel obstruction
- Cyclic vomiting syndrome
Correct answer: Cyclic vomiting syndrome
Cyclic vomiting syndrome is characterized by recurrent, self-limited episodes of intense vomiting with symptom-free intervals and no identifiable structural cause, often beginning in childhood. Emergency care focuses on rehydration, antiemetics, and dehydration monitoring, distinguishing it from appendicitis or obstruction, which have progressive findings rather than a return to baseline.
A patient with esophageal varices is being treated. The emergency nurse understands that the underlying cause of variceal formation is:
- Chronic NSAID use
- Helicobacter pylori infection
- Bacterial peritonitis
- Portal hypertension from cirrhosis
Correct answer: Portal hypertension from cirrhosis
Esophageal varices form because portal hypertension, usually from cirrhosis, forces blood through collateral vessels in the lower esophagus, causing them to dilate and become fragile. Treatment targets the bleeding (octreotide, band ligation) and the portal pressure, whereas H. pylori and NSAIDs cause peptic ulcers rather than varices.
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:
- Scheduled colonoscopy in two weeks
- Bowel rest with clear liquids
- Outpatient antibiotic therapy
- Emergent surgical repair
Correct answer: Emergent surgical repair
Free air under the diaphragm (pneumoperitoneum) indicates a perforated hollow viscus, and the definitive treatment is emergent surgical repair to close the defect and control peritoneal contamination. Outpatient antibiotics, oral intake, or a delayed colonoscopy are inappropriate and dangerous, so the emergency nurse prepares the patient for the operating room.
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
- Acute diverticulitis
- Acute hepatitis
- Acute pancreatitis
Correct answer: Acute cholecystitis
Acute cholecystitis is inflammation of the gallbladder presenting with right upper quadrant pain (often after fatty meals), fever, leukocytosis, and ultrasound findings of a thickened gallbladder wall and pericholecystic fluid. Hepatitis presents with jaundice and elevated transaminases, pancreatitis with epigastric pain radiating to the back, and diverticulitis with left lower quadrant pain.
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?
- The gallbladder
- The appendix
- The spleen with diaphragmatic irritation from intraperitoneal blood
- The pancreas
Correct answer: The spleen with diaphragmatic irritation from intraperitoneal blood
Kehr's sign is referred left shoulder pain caused by free intraperitoneal blood irritating the diaphragm, and after left upper quadrant blunt trauma it most often signals splenic injury and hemorrhage. The phrenic nerve refers diaphragmatic irritation to the shoulder, so the emergency nurse treats this finding as a red flag for intra-abdominal bleeding requiring urgent evaluation.
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 obtaining ultrasound because it may dislodge the placenta
- Placental abruption; avoid placing the patient in a left lateral position
- Placental abruption; avoid administering any intravenous fluids until blood type is known
- Placenta previa; avoid performing a digital or speculum vaginal exam until placental location is confirmed by ultrasound
Correct answer: Placenta previa; avoid performing a digital or speculum vaginal exam until placental location is confirmed by ultrasound
Placenta previa is the likely cause, and the emergency nurse should avoid a digital or speculum vaginal exam until ultrasound locates the placenta, because probing a placenta covering the cervical os can provoke catastrophic hemorrhage. Painless bright-red bleeding with a soft, nontender, relaxed uterus is the classic previa picture. Placental abruption is the tempting distractor, but abruption typically causes painful bleeding (often dark red) with a firm, tender, or board-like uterus and uterine irritability; IV access, fluids, left lateral positioning, and ultrasound are all appropriate and are not contraindicated.
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?
- A 4 to 6 gram IV loading dose over 20 to 30 minutes, followed by a maintenance infusion of 1 to 2 grams per hour
- A 2 gram IV loading dose over 5 minutes, followed by a maintenance infusion of 6 grams per hour
- A 1 gram IV push over 2 minutes, followed by a maintenance infusion of 4 grams per hour
- A single 10 gram intramuscular dose with no maintenance infusion
Correct answer: A 4 to 6 gram IV loading dose over 20 to 30 minutes, followed by a maintenance infusion of 1 to 2 grams per hour
A 4 to 6 gram IV loading dose over 20 to 30 minutes followed by a 1 to 2 gram per hour maintenance infusion is the standard magnesium sulfate regimen for seizure prophylaxis in preeclampsia with severe features. Magnesium is given to prevent eclamptic seizures, not to lower blood pressure, which is treated separately with agents such as labetalol or hydralazine. The other regimens use incorrect loading amounts, unsafe rapid pushes, or excessive maintenance rates that would risk magnesium toxicity.
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?
- Administer an additional 2 gram magnesium sulfate bolus
- Administer calcium gluconate intravenously
- Administer naloxone intravenously
- Administer intravenous potassium chloride
Correct answer: Administer calcium gluconate intravenously
Calcium gluconate is the antidote for magnesium sulfate toxicity and should be given intravenously after the infusion is stopped. Loss of deep tendon reflexes is an early warning sign, and progression to respiratory depression signals dangerous serum levels that calcium can reverse by competing with magnesium at the neuromuscular junction. Giving more magnesium would worsen toxicity, potassium does not address magnesium excess, and naloxone reverses opioids rather than magnesium-induced respiratory depression.
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 gestational hypertension; withhold magnesium sulfate until the seizure resolves
- The diagnosis is now eclampsia; protect the airway, position the patient on her side, and ensure magnesium sulfate is being administered
- The diagnosis is still preeclampsia; restrain the patient's limbs to stop the convulsion
- The diagnosis is now eclampsia; administer a rapid intravenous antihypertensive as the single most urgent action during the active seizure
Correct answer: The diagnosis is now eclampsia; protect the airway, position the patient on her side, and ensure magnesium sulfate is being administered
The onset of a new generalized seizure in a patient with preeclampsia defines eclampsia, and the immediate priority is airway protection with side-lying positioning while ensuring magnesium sulfate, the drug of choice for eclamptic seizures, is running. Preeclampsia becomes eclampsia precisely when seizure activity occurs. Physical restraint can cause injury and does not stop a seizure, and although severe-range blood pressure must be treated, airway management and magnesium take precedence over giving an antihypertensive during the active convulsion.
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?
- Immediate surgical shunt placement before any needle aspiration is attempted
- Corporal aspiration with or without irrigation, followed by intracavernosal injection of phenylephrine
- Application of ice packs and oral pseudoephedrine only
- Intravenous heparin infusion to dissolve the obstructing clot
Correct answer: Corporal aspiration with or without irrigation, followed by intracavernosal injection of phenylephrine
Corporal aspiration, with or without saline irrigation, followed by intracavernosal phenylephrine is the first-line treatment for ischemic priapism and should be started as rapidly as possible after diagnosis. Ischemic priapism is a compartment-syndrome-like emergency, and prolonged ischemia beyond roughly four to six hours risks permanent erectile dysfunction. Surgical shunting is reserved for failure of aspiration and phenylephrine; ice and oral decongestants are inadequate; and heparin does not treat the stasis of low-flow priapism and would increase bleeding risk.
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?
- The salvage rate is unaffected by time, so imaging can be completed in full before any consultation
- Testicular salvage approaches 90 to 100 percent when detorsion occurs within about 6 hours of pain onset but falls sharply after 12 hours, so surgical exploration should not be delayed
- Antibiotics will reverse the ischemia, making immediate surgery unnecessary
- Torsion resolves spontaneously within 24 hours, so observation with serial exams is the standard initial approach
Correct answer: Testicular salvage approaches 90 to 100 percent when detorsion occurs within about 6 hours of pain onset but falls sharply after 12 hours, so surgical exploration should not be delayed
Testicular salvage approaches 90 to 100 percent when detorsion is performed within about 6 hours of pain onset, then drops sharply after 12 hours and below roughly 10 percent after 24 hours, so torsion is time-critical and urology must be involved emergently without delaying for an exhaustive workup. The twisted spermatic cord cuts off blood flow, producing progressive ischemic injury. Torsion does not reliably self-resolve, time strongly affects salvage, and antibiotics treat infection such as epididymitis rather than restoring perfusion.
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?
- Several hours later, once laboratory results return
- Only after the patient is fully sedated and quiet
- During and immediately after sedation and physical restraint, when sudden deterioration and arrest are most likely
- Only if the patient remains combative after medication
Correct answer: During and immediately after sedation and physical restraint, when sudden deterioration and arrest are most likely
The highest-risk window is during and immediately after sedation and physical restraint, when sudden cardiopulmonary deterioration and arrest most often occur in hyperactive delirium; the great majority of deaths happen where physical restraint was used. The nurse must keep continuous cardiac, oxygen saturation, and temperature monitoring on at this exact point rather than relaxing observation once the patient appears calm.
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?
- Transient hypertension
- Pupillary dilation
- Mild dehydration
- Severe metabolic acidosis and hyperthermia from sustained extreme exertion
Correct answer: Severe metabolic acidosis and hyperthermia from sustained extreme exertion
Severe metabolic acidosis and hyperthermia from sustained extreme muscular exertion are central drivers of sudden death in hyperactive delirium and demand aggressive active cooling, fluids, and sedation to stop the exertion. Mild dehydration, transient hypertension, and dilated pupils are findings but are not the immediately lethal physiology the nurse is racing to reverse.
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 medication limits movement
- Chemical restraint, because medication is used to control behavior rather than to treat a diagnosed condition
- Seclusion, because the patient is sedated
- Neither, because medications are never restraints
Correct answer: Chemical restraint, because medication is used to control behavior rather than to treat a diagnosed condition
This is chemical restraint, because a medication given to control behavior rather than to treat a standard diagnosed condition meets the regulatory definition of chemical restraint and triggers restraint monitoring and documentation requirements. Physical restraint refers to a device that limits movement, and seclusion is involuntary confinement to a room, neither of which describes a behavior-controlling medication.
An emergency nurse reviews restraint policy with a new colleague. Which statement correctly contrasts chemical restraint and physical restraint regarding monitoring obligations?
- Physical restraint can be applied indefinitely without reassessment
- Chemical restraint requires no documentation once given
- Both chemical and physical restraint require ongoing assessment of the patient's safety, circulation, and response
- Only physical restraint requires close monitoring; chemical restraint does not
Correct answer: Both chemical and physical restraint require ongoing assessment of the patient's safety, circulation, and response
Both chemical and physical restraint require ongoing assessment of the patient's safety, circulation, airway, and response, because each is a restrictive intervention with its own risks. The idea that chemical restraint needs no monitoring or documentation, or that physical restraint can be left in place without reassessment, is unsafe and violates restraint standards.
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?
- Lead-pipe rigidity with hyporeflexia
- Lower-extremity clonus with hyperreflexia
- Absent deep tendon reflexes
- Flaccid paralysis
Correct answer: Lower-extremity clonus with hyperreflexia
Lower-extremity clonus with hyperreflexia is the hallmark of serotonin syndrome and is the single most useful neuromuscular finding separating it from neuroleptic malignant syndrome. Neuroleptic malignant syndrome instead produces uniform lead-pipe rigidity with hyporeflexia; flaccid paralysis and absent reflexes fit neither syndrome.
An emergency nurse compares serotonin syndrome and neuroleptic malignant syndrome to anticipate care. Which pairing of typical causative medication classes is correct?
- Both syndromes are caused only by benzodiazepines
- Serotonin syndrome from dopamine blockers; neuroleptic malignant syndrome from serotonergic agents
- Both syndromes are caused only by opioids
- Serotonin syndrome from serotonergic agents; neuroleptic malignant syndrome from dopamine-blocking antipsychotics
Correct answer: Serotonin syndrome from serotonergic agents; neuroleptic malignant syndrome from dopamine-blocking antipsychotics
Serotonin syndrome is caused by serotonergic agents such as SSRIs, SNRIs, and certain combinations, while neuroleptic malignant syndrome is caused by dopamine-blocking antipsychotics or abrupt withdrawal of dopaminergic drugs. Reversing those associations is incorrect, and neither syndrome is produced by opioids or benzodiazepines alone.
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?
- Gradual onset over days after a dopamine-blocking agent
- Onset within minutes of a single dose
- Symptoms that resolve within one hour without treatment
- Onset only after stopping all medications
Correct answer: Gradual onset over days after a dopamine-blocking agent
Gradual onset over days after starting a dopamine-blocking agent is typical of neuroleptic malignant syndrome, in contrast to serotonin syndrome, which usually develops within hours of a serotonergic dose change. Rapid onset within minutes, onset only after stopping medications, and spontaneous resolution within an hour do not fit neuroleptic malignant syndrome.
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?
- Reluctance to discuss feelings with family
- Vague wish that life were over, with no plan
- A specific plan, stated intent, and access to a lethal method
- A history of feeling sad last year
Correct answer: A specific plan, stated intent, and access to a lethal method
A specific plan combined with stated intent and access to a lethal method represents the highest acute suicide risk and requires immediate one-to-one observation and removal of means. A vague passive wish without a plan, a remote history of sadness, or general reluctance to talk are concerning but do not carry the same imminent danger.
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?
- Avoid the topic so the patient is not given ideas
- Asking directly and nonjudgmentally about suicide does not increase risk and is essential to assessment
- Only the physician may ever mention suicide
- Suicide should only be discussed if the patient brings it up first
Correct answer: Asking directly and nonjudgmentally about suicide does not increase risk and is essential to assessment
Asking directly and nonjudgmentally about suicidal thoughts does not increase risk and is an essential part of assessment, allowing the team to gauge ideation, plan, intent, and access to means. Avoiding the subject, restricting the question to physicians, or waiting for the patient to raise it can miss life-threatening risk.
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 flumazenil
- Intravenous sodium bicarbonate
- Oral activated charcoal alone
- Intravenous calcium gluconate
Correct answer: Intravenous sodium bicarbonate
Intravenous sodium bicarbonate is the priority for tricyclic antidepressant cardiotoxicity once the QRS widens beyond about 100 milliseconds, because serum alkalinization and added sodium counter the sodium-channel blockade and prevent ventricular dysrhythmias. Activated charcoal does not treat established cardiotoxicity, flumazenil is for benzodiazepines and is dangerous here, and calcium is not the antidote for tricyclic toxicity.
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?
- Naloxone, because acetaminophen is an opioid
- Deferoxamine, because acetaminophen binds iron
- No treatment, because the level is too early to interpret
- N-acetylcysteine, because it is nearly fully hepatoprotective when started within about eight hours
Correct answer: N-acetylcysteine, because it is nearly fully hepatoprotective when started within about eight hours
N-acetylcysteine is the antidote, and starting it within roughly eight hours of an acute acetaminophen ingestion provides nearly complete protection against hepatotoxicity, so timely administration once the level crosses the treatment line is critical. Naloxone treats opioids, deferoxamine treats iron, and a four-hour level plotting above the line is the standard point to begin treatment, not 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?
- Acute alcohol intoxication
- Simple viral gastroenteritis with no medication concern
- Lithium toxicity
- Therapeutic lithium effect
Correct answer: Lithium toxicity
Lithium toxicity is the best explanation, because dehydration reduces lithium clearance and produces coarse tremor, ataxia, slurred speech, gastrointestinal symptoms, and neurologic changes. These features are not normal therapeutic effects, and attributing them to alcohol or simple gastroenteritis would dangerously overlook a narrow-therapeutic-index drug requiring level checks and possible dialysis.
A patient presents in a manic episode of bipolar disorder. Which cluster of findings should the emergency nurse expect?
- Decreased need for sleep, rapid pressured speech, grandiosity, and impulsive risk-taking
- Isolated visual hallucinations with normal mood
- Flat affect with no spontaneous movement
- Excessive sleeping, slowed speech, and social withdrawal
Correct answer: Decreased need for sleep, rapid pressured speech, grandiosity, and impulsive risk-taking
A manic episode is marked by a decreased need for sleep, rapid pressured speech, grandiosity, and impulsive high-risk behavior, often with elevated or irritable mood. Excessive sleeping and slowed speech suggest depression, immobility with flat affect suggests catatonia or negative symptoms, and isolated hallucinations with normal mood point elsewhere.
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?
- Beta-blocker toxicity
- Salicylate (aspirin) toxicity
- Iron toxicity
- Benzodiazepine toxicity
Correct answer: Salicylate (aspirin) toxicity
Salicylate toxicity classically produces tinnitus, hyperventilation with a primary respiratory alkalosis combined with a metabolic acidosis, nausea, and diaphoresis. Beta-blocker overdose causes bradycardia and hypotension, iron causes gastrointestinal hemorrhage, and benzodiazepines cause sedation, none of which match this acid-base picture.
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?
- Crowd the patient with several staff to show control
- Use a calm voice, maintain a safe distance, listen, and offer realistic choices
- Argue with the patient's delusional statements to correct them
- Threaten restraints immediately to gain cooperation
Correct answer: Use a calm voice, maintain a safe distance, listen, and offer realistic choices
Effective verbal de-escalation uses a calm voice, a safe distance and non-threatening posture, active listening, and offering realistic choices to give the patient a sense of control. Crowding, immediate threats of restraint, and arguing with delusions all tend to escalate agitation and increase the risk of violence.
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?
- Flumazenil administration
- Forced ambulation to keep the patient awake
- Immediate aggressive sedation to keep the patient asleep
- Close airway and respiratory monitoring with supportive care, because deep sedation can alternate abruptly with agitation
Correct answer: Close airway and respiratory monitoring with supportive care, because deep sedation can alternate abruptly with agitation
GHB intoxication demands close airway and respiratory monitoring with supportive care, because patients characteristically swing between deep central nervous system depression with apnea and sudden combative arousal. Additional sedation worsens respiratory depression, flumazenil does not reverse GHB, and forcing ambulation does not address the airway risk.
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?
- Activated charcoal forced orally in the unresponsive patient
- Glucagon, as the specific opioid antidote
- Flumazenil, given as a single large dose
- Naloxone, titrated to restore adequate breathing, with monitoring for re-sedation as it wears off
Correct answer: Naloxone, titrated to restore adequate breathing, with monitoring for re-sedation as it wears off
Naloxone is the opioid antidote and should be titrated to restore adequate ventilation rather than full arousal, with continued monitoring because its duration is often shorter than the opioid, allowing re-sedation. Flumazenil is for benzodiazepines, charcoal is unsafe in an unprotected airway, and glucagon treats beta-blocker toxicity, not opioids.
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 predicts the exact time of the last drink
- It objectively quantifies withdrawal severity to guide and monitor symptom-triggered treatment
- It diagnoses the cause of intoxication
- It replaces the need for any nursing assessment
Correct answer: It objectively quantifies withdrawal severity to guide and monitor symptom-triggered treatment
The CIWA-Ar scale objectively quantifies alcohol withdrawal severity so that benzodiazepine dosing can be triggered by symptoms and the response tracked over time. It supplements rather than replaces nursing judgment, does not pinpoint the last drink, and does not diagnose the cause of intoxication.
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 cures the overdose permanently
- Flumazenil is always given immediately for any benzodiazepine overdose
- Flumazenil can precipitate seizures and withdrawal, especially in chronic users or mixed overdoses, so it is used cautiously
- Flumazenil is the same as naloxone
Correct answer: Flumazenil can precipitate seizures and withdrawal, especially in chronic users or mixed overdoses, so it is used cautiously
Flumazenil can precipitate seizures and acute withdrawal, particularly in chronically benzodiazepine-dependent patients or mixed overdoses where seizure risk is high, so supportive airway care is usually preferred over routine reversal. It is not interchangeable with naloxone and does not permanently cure an overdose; many isolated benzodiazepine overdoses are managed with observation alone.
A patient is brought in agitated and hallucinating after ingesting a plant containing an anticholinergic substance. The emergency nurse expects which classic toxidrome?
- Hot and flushed skin, dry mucous membranes, dilated pupils, urinary retention, and delirium
- Pinpoint pupils and respiratory depression
- Bradycardia with cold clammy skin
- Profuse sweating, drooling, miosis, and diarrhea
Correct answer: Hot and flushed skin, dry mucous membranes, dilated pupils, urinary retention, and delirium
The anticholinergic toxidrome presents as hot, flushed, dry skin, dilated pupils, urinary retention, tachycardia, and agitated delirium, captured by the saying 'mad as a hatter, dry as a bone, red as a beet.' Sweating, drooling, and miosis describe a cholinergic toxidrome, and pinpoint pupils with respiratory depression describe opioids.
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?
- Atropine
- Flumazenil
- Deferoxamine
- Naloxone
Correct answer: Atropine
Atropine is the antidote for organophosphate (cholinergic) toxicity, drying secretions and reversing the muscarinic effects that threaten the airway, and is given alongside pralidoxime. Naloxone treats opioids, deferoxamine treats iron, and flumazenil treats benzodiazepines, none of which address the life-threatening cholinergic crisis here.
An emergency nurse caring for a patient in four-point restraints reviews the required monitoring. Which practice reflects safe restraint care?
- Leave restraints in place until discharge regardless of behavior
- Check the patient only once per shift
- Tighten restraints whenever the patient moves
- Perform frequent assessment of circulation, airway, skin, and the continued need for restraint, with timely reassessment
Correct answer: Perform frequent assessment of circulation, airway, skin, and the continued need for restraint, with timely reassessment
Safe restraint care requires frequent assessment of circulation, airway, skin integrity, hydration, and the ongoing need for restraint, with timely reassessment so restraints are removed as soon as it is safe. Checking only once a shift, leaving restraints in place indefinitely, or tightening them with any movement are unsafe and can cause neurovascular injury or 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
- Positive symptoms
- Cognitive deficits only
- Normal stress response
Correct answer: Positive symptoms
Hallucinations and delusions are positive symptoms of schizophrenia, representing experiences added to normal function, and command hallucinations to self-harm require immediate safety measures. Negative symptoms involve loss of function such as flat affect and avolition, and these acute perceptual disturbances are not merely cognitive deficits or a normal stress response.
An emergency nurse must differentiate delirium from dementia in a confused older adult. Which feature most strongly points to delirium rather than dementia?
- Stable cognition with no change in alertness
- Acute onset of fluctuating attention and consciousness, often with an identifiable medical cause
- Slowly progressive word-finding difficulty without inattention
- Gradual memory decline over years
Correct answer: Acute onset of fluctuating attention and consciousness, often with an identifiable medical cause
Acute onset of fluctuating attention and level of consciousness, often tied to an underlying medical cause such as infection, hypoxia, or medication, characterizes delirium and signals a reversible emergency. Dementia instead develops gradually over months to years with relatively stable alertness, so a slow decline or stable cognition argues against delirium.
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?
- Deferoxamine
- Naloxone
- Octreotide
- Sodium bicarbonate
Correct answer: Octreotide
Octreotide is anticipated for sulfonylurea overdose because it suppresses the insulin release that causes prolonged, recurrent hypoglycemia even after dextrose is given. Naloxone, deferoxamine, and sodium bicarbonate target opioids, iron, and sodium-channel blockade respectively and do not address sulfonylurea-driven hyperinsulinemia.
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?
- Forcing oral fluids regardless of mental status
- Withholding all care until a toxicology screen returns
- Supportive care with airway, breathing, circulation, and continuous monitoring while identifying the agent
- Immediate gastric lavage for all ingestions
Correct answer: Supportive care with airway, breathing, circulation, and continuous monitoring while identifying the agent
Supportive care addressing airway, breathing, circulation, and continuous monitoring while the agent is identified is the universal priority in poisoning, because most patients are managed supportively rather than with a specific antidote. Routine lavage for all ingestions, delaying care until labs return, and forcing oral fluids in a patient with altered mentation are unsafe.
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?
- Episodic clonus and hyperreflexia
- Flushed dry skin and dilated pupils
- Elevated mood with high energy and grandiosity
- Persistent low mood, anhedonia, worthlessness, sleep and appetite changes, and hopelessness
Correct answer: Persistent low mood, anhedonia, worthlessness, sleep and appetite changes, and hopelessness
A major depressive episode features persistent low mood, anhedonia, feelings of worthlessness, sleep and appetite disturbance, and hopelessness, and hopelessness in particular warrants careful suicide risk screening. Elevated mood and grandiosity describe mania, while clonus or dry flushed skin and dilated pupils describe toxidromes, not depression.
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 achieve faster, more effective calming while allowing lower doses of each and reducing some side effects
- To guarantee the patient sleeps for 24 hours
- Because antipsychotics alone never work
- To eliminate the need for any monitoring
Correct answer: To achieve faster, more effective calming while allowing lower doses of each and reducing some side effects
Combining an antipsychotic with a benzodiazepine can produce faster, more effective calming while permitting lower doses of each and reducing certain adverse effects. The goal is safe, adequate sedation rather than prolonged unconsciousness, antipsychotics are often effective on their own, and combination therapy still requires 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?
- Restrain the patient preemptively
- Reassure the family it is normal teenage behavior and discharge
- Initiate close observation and a structured suicide risk assessment, ensuring the environment is free of lethal means
- Wait for the patient to spontaneously report suicidal thoughts
Correct answer: Initiate close observation and a structured suicide risk assessment, ensuring the environment is free of lethal means
Giving away possessions, goodbye messages, and withdrawal are warning signs that warrant immediate close observation and a structured suicide risk assessment, along with removing lethal means from the environment. Dismissing these signs as normal, waiting passively for disclosure, or preemptively restraining a cooperative patient are all inappropriate and potentially dangerous.
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 mg intravenous push over 2 minutes
- 0.5 mg subcutaneously into the upper arm
- 0.3 to 0.5 mg intramuscularly into the mid-outer thigh
- 1 mg intramuscularly into the deltoid
Correct answer: 0.3 to 0.5 mg intramuscularly into the mid-outer thigh
The correct action is 0.3 to 0.5 mg of epinephrine 1 mg/mL given intramuscularly into the anterolateral thigh (vastus lateralis). The 2023 anaphylaxis practice parameter and ENA teaching make IM injection into the thigh first-line because it produces rapid, reliable absorption; the adult dose is 0.3 to 0.5 mg, repeatable every 5 to 10 minutes. IV push at full IM strength risks dangerous arrhythmias and is reserved for refractory shock as a dilute infusion, and subcutaneous absorption is too slow.
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?
- Both are diabetic ketoacidosis at different severities
- The first is hyperosmolar hyperglycemic state and the second is diabetic ketoacidosis
- Both are hyperosmolar hyperglycemic state at different severities
- The first is diabetic ketoacidosis and the second is hyperosmolar hyperglycemic state
Correct answer: The first is diabetic ketoacidosis and the second is hyperosmolar hyperglycemic state
The first patient has diabetic ketoacidosis (DKA) and the second has hyperosmolar hyperglycemic state (HHS). DKA is defined by acidosis (pH under 7.3, bicarbonate under 18) with significant ketosis, while HHS is marked by very high glucose (600 mg/dL or greater), high osmolality (effective osmolality over 300 mOsm/kg or total over 320 mOsm/kg per 2024 ADA criteria) and a pH of 7.3 or higher with minimal ketones. The presence of acidosis and ketones is what separates DKA from HHS.
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:
- Begin potassium replacement and recheck the level
- Start a dextrose 5 percent infusion
- Administer 1 ampule of sodium bicarbonate
- Give a bolus of regular insulin 0.1 unit/kg
Correct answer: Begin potassium replacement and recheck the level
The correct step is to replace potassium first because the level is already low (3.2 mmol/L) and insulin drives potassium into cells, which can precipitate life-threatening hypokalemia and arrhythmia. The 2024 ADA hyperglycemic crisis consensus says to hold insulin and replace potassium when the level is below 3.5 mmol/L. Insulin, bicarbonate, and adding dextrose are not the priority when potassium is dangerously low.
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?
- Maintenance fluids only until insulin lowers the glucose
- Isotonic crystalloid at roughly 500 to 1000 mL per hour for the first few hours
- Hypotonic 0.45 percent saline bolus of 2 liters
- Dextrose 5 percent in water at 100 mL per hour
Correct answer: Isotonic crystalloid at roughly 500 to 1000 mL per hour for the first few hours
The appropriate order is an isotonic crystalloid (such as 0.9 percent saline or a balanced solution) at about 500 to 1000 mL per hour for the first 2 to 4 hours. DKA patients are profoundly volume depleted, and current consensus calls for isotonic fluid replacement before tailoring tonicity to corrected sodium. Hypotonic fluid as the initial bolus, low-rate dextrose, or maintenance-only fluids would underresuscitate the patient.
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?
- Heart rate under 60 and blood pressure normal
- Potassium returns to above 5.5 mmol/L
- Glucose under 80 mg/dL regardless of pH
- Venous pH 7.3 or higher (or bicarbonate 18 or higher) with resolution of ketosis
Correct answer: Venous pH 7.3 or higher (or bicarbonate 18 or higher) with resolution of ketosis
DKA is resolved when the venous pH is 7.3 or higher (or bicarbonate is 18 mmol/L or higher) and ketosis has cleared (beta-hydroxybutyrate under 0.6 mmol/L). The acidosis and ketones, not the glucose alone, define the crisis, so insulin is continued until ketosis and acidosis resolve even after glucose falls. A glucose under 80, a high potassium, or normalized vital signs do not by themselves mark resolution.
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?
- Oral or rectal cation-exchange resin
- IV insulin with dextrose
- Nebulized albuterol
- IV calcium gluconate to stabilize the myocardium
Correct answer: IV calcium gluconate to stabilize the myocardium
The first drug is IV calcium gluconate (or calcium chloride), which stabilizes the cardiac membrane and protects against lethal arrhythmia within minutes; it does not lower potassium but buys time. Insulin with dextrose and albuterol shift potassium into cells over 15 to 60 minutes, and resins or dialysis remove it more slowly. With ECG changes present, cardiac protection comes first.
As serum potassium rises, the emergency nurse expects the ECG to change in a characteristic sequence. Which progression reflects worsening hyperkalemia?
- Peaked T waves, then a widened QRS, then a sine wave pattern
- Shortened PR, then delta wave, then narrow complex tachycardia
- Prolonged QT, then U waves, then torsades de pointes
- ST elevation, then Q waves, then T inversion
Correct answer: Peaked T waves, then a widened QRS, then a sine wave pattern
Worsening hyperkalemia classically produces peaked (tented) T waves first, then PR prolongation and QRS widening, and finally a sine-wave pattern preceding asystole or ventricular fibrillation. Recognizing this progression lets the nurse escalate treatment urgently. Prolonged QT with U waves and torsades is the picture of hypokalemia, not hyperkalemia.
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?
- Flattened T waves with prominent U waves
- Shortened QT interval
- Tall peaked T waves
- Wide sine-wave complexes
Correct answer: Flattened T waves with prominent U waves
Hypokalemia produces flattened or inverted T waves with prominent U waves, ST depression, and a prolonged QT, predisposing to ventricular dysrhythmias. Replacing potassium (and checking magnesium) is the priority. Peaked T waves, a short QT, and sine-wave complexes are features of hyperkalemia rather than hypokalemia.
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?
- Phosphate
- Calcium
- Chloride
- Magnesium
Correct answer: Magnesium
Hypomagnesemia commonly underlies refractory hypokalemia because low magnesium increases renal potassium wasting, so potassium will not stay corrected until magnesium is repleted. This is frequent in malnutrition and chronic alcohol use. Calcium, phosphate, and chloride deficits do not produce this self-perpetuating potassium 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?
- Rapid IV calcium gluconate
- Immediate hemodialysis for everyone
- Aggressive isotonic saline rehydration
- Restriction of all IV fluids
Correct answer: Aggressive isotonic saline rehydration
The cornerstone is aggressive isotonic (0.9 percent) saline rehydration, which restores volume and promotes urinary calcium excretion; bisphosphonates and calcitonin are added for sustained lowering. Giving calcium would worsen the problem, fluid restriction deepens the dehydration that drives the calcium higher, and dialysis is reserved for renal failure or extreme refractory cases.
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?
- Hypocalcemia
- Hypomagnesemia alone
- Hypernatremia
- Hyperkalemia
Correct answer: Hypocalcemia
Citrate in banked blood binds calcium and causes hypocalcemia, producing perioral tingling, muscle twitching, a positive Chvostek or Trousseau sign, and QT prolongation during massive transfusion. The nurse anticipates IV calcium replacement. Stored blood can raise potassium, but the citrate-driven picture of tingling, tetany, and a long QT points specifically to low calcium.
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:
- Hypertensive crisis
- Cerebral edema with seizures
- Peripheral edema
- Hyperkalemic arrest
Correct answer: Cerebral edema with seizures
Acute hyponatremia causes water to shift into brain cells, and the greatest immediate danger is cerebral edema producing seizures, altered mental status, and herniation. Symptomatic acute cases may need hypertonic 3 percent saline. Peripheral edema, hyperkalemia, and hypertension are not the life-threatening consequence of a rapidly falling sodium.
A patient with chronic hyponatremia is being corrected. The emergency nurse knows that raising the serum sodium too rapidly risks which serious complication?
- Osmotic demyelination syndrome
- Acute tubular necrosis
- Rhabdomyolysis
- Cerebral edema
Correct answer: Osmotic demyelination syndrome
Correcting chronic hyponatremia too quickly causes osmotic demyelination syndrome (central pontine myelinolysis), with delayed dysarthria, paralysis, and altered consciousness. Sodium is therefore raised in a controlled fashion, generally no more than about 8 to 10 mmol/L in 24 hours (and as little as 8 mmol/L in high-risk patients). Cerebral edema is the risk of the low sodium itself, 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?
- High-dose IV vasopressin
- Oral fludrocortisone
- IV hydrocortisone 100 mg
- IV insulin and dextrose
Correct answer: IV hydrocortisone 100 mg
The priority is IV hydrocortisone 100 mg given immediately, alongside aggressive isotonic saline and dextrose for hypoglycemia. Adrenal crisis is glucocorticoid and mineralocorticoid deficiency, so the missing steroid must be replaced without waiting for confirmatory tests; hydrocortisone also provides mineralocorticoid effect at stress doses. Insulin would worsen hypoglycemia, vasopressor alone will not reverse the deficiency, and oral fludrocortisone is too slow for a crisis.
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:
- Directly destroy thyroid tissue
- Lower the serum calcium
- Replace deficient thyroid hormone
- Control heart rate and adrenergic symptoms
Correct answer: Control heart rate and adrenergic symptoms
In thyroid storm a beta-blocker such as propranolol is given to control the dangerous tachycardia, hypertension, and adrenergic hyperactivity; thionamides block hormone synthesis and iodine blocks release, but symptom control of the heart rate is the immediate beta-blocker role. It does not destroy thyroid tissue, replace hormone, or affect calcium.
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?
- IV thyroid hormone replacement plus IV hydrocortisone
- IV beta-blocker for the bradycardia
- High-dose IV diuretics for the edema
- Rapid external rewarming with warm blankets only
Correct answer: IV thyroid hormone replacement plus IV hydrocortisone
Myxedema coma is treated with IV thyroid hormone (levothyroxine, often with liothyronine) plus IV hydrocortisone to cover possible coexisting adrenal insufficiency, along with supportive care for hypothermia and hypoventilation. Giving a beta-blocker would worsen the bradycardia and hypotension, aggressive diuresis is harmful, and warming alone does not treat the underlying hormone deficiency.
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 treatment and observe for spontaneous recovery
- Give IV regular insulin to stabilize the level
- Insert a nasogastric tube and instill glucose gel
- Give 15 to 20 grams of a fast-acting oral carbohydrate and recheck in 15 minutes
Correct answer: Give 15 to 20 grams of a fast-acting oral carbohydrate and recheck in 15 minutes
For a conscious patient who can protect the airway and swallow, the correct action is 15 to 20 grams of fast-acting oral carbohydrate, then a glucose recheck in about 15 minutes (the rule of 15). If the patient could not swallow or had no IV access, IM glucagon or IV dextrose would be used. Insulin would deepen the hypoglycemia, and withholding treatment risks seizure and coma.
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?
- Broad anticoagulation as the first step
- Prompt analgesia, IV hydration, and supplemental oxygen as needed
- Withholding opioids to avoid dependence
- Immediate exchange transfusion for all such patients
Correct answer: Prompt analgesia, IV hydration, and supplemental oxygen as needed
A vaso-occlusive sickle cell crisis is managed with prompt and adequate analgesia (often opioids), IV hydration, and oxygen when saturations are low, treating any precipitant. Pain control should not be delayed out of fear of dependence. Exchange transfusion is reserved for severe complications such as acute chest syndrome or stroke, and routine anticoagulation is not first-line for uncomplicated pain crisis.
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:
- Immune thrombocytopenic purpura
- Disseminated intravascular coagulation
- Hemophilia A
- Thrombotic thrombocytopenic purpura
Correct answer: Disseminated intravascular coagulation
The combination of bleeding, prolonged clotting times, low platelets, low fibrinogen, and elevated D-dimer is classic disseminated intravascular coagulation (DIC), in which simultaneous clotting and fibrinolysis consume clotting factors. Treatment targets the underlying cause (here sepsis) with supportive blood products. Immune thrombocytopenia and hemophilia do not produce this consumptive coagulopathy, and TTP centers on microangiopathic hemolysis with a normal 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 acetaminophen
- Stop the transfusion immediately and keep the IV line open with saline
- Administer the next unit to dilute the reaction
- Continue the transfusion and add a diuretic
Correct answer: Stop the transfusion immediately and keep the IV line open with saline
The first action is to stop the transfusion immediately and maintain IV access with normal saline through new tubing, because fever, flank pain, hemoglobinuria, and hypotension signal an acute hemolytic (often ABO-incompatible) reaction that can cause renal failure and shock. The nurse then notifies the provider and blood bank and supports blood pressure and urine output. Slowing or continuing the transfusion would worsen the hemolysis.
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?
- Platelet transfusion
- Administration of vitamin K
- Desmopressin as the only therapy for all bleeds
- Replacement of factor VIII
Correct answer: Replacement of factor VIII
Hemophilia A is a deficiency of clotting factor VIII, so the priority for an acute hemarthrosis is prompt factor VIII replacement. Platelets are normal in hemophilia, and vitamin K corrects warfarin-related or hepatic deficiencies rather than a congenital factor deficiency. Desmopressin may help mild hemophilia A but is not adequate alone for a significant joint bleed.
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:
- Administering acetaminophen and discharging home
- Drawing cultures and giving broad-spectrum antibiotics without delay
- Placing the patient in a crowded hallway bed
- Waiting for culture results before any antibiotics
Correct answer: Drawing cultures and giving broad-spectrum antibiotics without delay
Febrile neutropenia is an oncologic emergency; the priority is to obtain cultures and start broad-spectrum antibiotics within about an hour, because the immunocompromised patient can deteriorate rapidly with overwhelming infection. Antibiotics are not delayed for results. The patient also needs protective isolation, not a crowded shared space, and should not be discharged.
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?
- Glucose 110 mg/dL and pH 7.40
- Temperature 38.5 degrees Celsius and heart rate 96 beats per minute
- Blood pressure 138/84 mmHg and oxygen saturation 97 percent
- Sodium 140 mmol/L and potassium 4.2 mmol/L
Correct answer: Temperature 38.5 degrees Celsius and heart rate 96 beats per minute
SIRS is defined by two or more of: 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 (or over 10 percent bands). A temperature of 38.5 with a heart rate of 96 meets two criteria. Normal blood pressure, oxygen saturation, glucose, pH, and routine electrolytes are not SIRS 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:
- Give another 6 liters of crystalloid before any vasopressor
- Begin a dopamine infusion as the preferred first vasopressor
- Start a vasopressor such as norepinephrine to maintain a mean arterial pressure of at least 65 mmHg
- Withhold antibiotics until the source is confirmed
Correct answer: Start a vasopressor such as norepinephrine to maintain a mean arterial pressure of at least 65 mmHg
When hypotension persists despite adequate fluid resuscitation, the next priority is a vasopressor, with norepinephrine as the first-line agent to maintain a mean arterial pressure of at least 65 mmHg. Endlessly bolusing fluid risks volume overload, antibiotics should already be running, and dopamine is no longer the preferred initial vasopressor because of arrhythmia risk.
An emergency nurse is initiating the sepsis hour-1 bundle for a patient with suspected septic shock. Which set of actions reflects that bundle?
- Restrict fluids and start vasopressors immediately in every patient
- Measure lactate, draw blood cultures before antibiotics, give broad-spectrum antibiotics, start 30 mL/kg crystalloid for hypotension or lactate at least 4, and add vasopressors for ongoing hypotension
- Give antibiotics only after cultures and imaging both return
- Obtain a CT scan, consult surgery, give a single antibiotic dose, and admit to a floor bed
Correct answer: Measure lactate, draw blood cultures before antibiotics, give broad-spectrum antibiotics, start 30 mL/kg crystalloid for hypotension or lactate at least 4, and add vasopressors for ongoing hypotension
The Surviving Sepsis Campaign hour-1 bundle includes measuring lactate, drawing blood cultures before antibiotics, administering broad-spectrum antibiotics, beginning rapid 30 mL/kg crystalloid for hypotension or lactate of 4 mmol/L or more, and applying vasopressors if the patient stays hypotensive to keep the mean arterial pressure at least 65. Delaying antibiotics for imaging or culture results, or withholding fluids, conflicts with the bundle.
A patient with abdominal pain is being screened for sepsis using qSOFA at the bedside. Which three findings make up the qSOFA score?
- Respiratory rate at least 22, altered mentation, and systolic blood pressure 100 mmHg or less
- Fever, leukocytosis, and tachycardia
- Heart rate, oxygen saturation, and temperature
- Lactate, blood cultures, and urine output
Correct answer: Respiratory rate at least 22, altered mentation, and systolic blood pressure 100 mmHg or less
The quick SOFA (qSOFA) score uses three bedside findings: respiratory rate of 22 or more, altered mental status, and systolic blood pressure of 100 mmHg or lower, with two or more suggesting higher risk of poor outcome from sepsis. Fever, white count, and tachycardia are SIRS-type findings, while lactate and cultures are part of management bundles rather than the qSOFA score.
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?
- Distributive shock
- Neurogenic shock
- Hypovolemic shock
- Cardiogenic shock
Correct answer: Hypovolemic shock
Cool clammy skin, tachycardia, a narrowed pulse pressure, and hypotension after hemorrhage describe hypovolemic shock from intravascular volume loss, in which the body vasoconstricts to compensate. Treatment is hemorrhage control and volume (blood) replacement. Distributive and neurogenic shock typically cause warm vasodilated skin, and cardiogenic shock arises from pump failure rather than blood loss.
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?
- Vasopressors and possibly atropine for the bradycardia
- Beta-blockers to slow the heart
- Aggressive diuresis
- Immediate epinephrine for anaphylaxis
Correct answer: Vasopressors and possibly atropine for the bradycardia
Neurogenic shock results from loss of sympathetic tone, producing hypotension with bradycardia and warm vasodilated skin; treatment adds vasopressors to restore vascular tone and atropine for symptomatic bradycardia along with cautious fluids. Beta-blockers and diuretics would worsen the hypotension and bradycardia, and epinephrine for anaphylaxis does not apply to a spinal cord cause.
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?
- Neither, because distributive shock always presents cold
- The patient with cold, mottled skin and a thready pulse
- The patient with warm, flushed skin and low vascular resistance
- Both present identically in early shock
Correct answer: The patient with warm, flushed skin and low vascular resistance
Distributive shock, such as early septic shock, classically presents warm and flushed with bounding pulses and low systemic vascular resistance because of widespread vasodilation. The cold, mottled, thready-pulse picture reflects hypovolemic or cardiogenic shock with compensatory vasoconstriction. Recognizing the warm phase helps the nurse identify distributive shock before decompensation.
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?
- Benzodiazepines
- Opioids
- Beta-blockers as monotherapy
- Antipsychotics as monotherapy
Correct answer: Benzodiazepines
Alcohol withdrawal is treated first-line with benzodiazepines, which calm central nervous system hyperexcitability, prevent seizures, and reduce the risk of delirium tremens. Symptom-triggered dosing is common. Beta-blockers may mask autonomic signs but do not prevent seizures, antipsychotics lower the seizure threshold, and opioids are not indicated for withdrawal management.
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?
- Flumazenil
- Physostigmine
- Naloxone
- Activated charcoal
Correct answer: Naloxone
Naloxone is the opioid antagonist used to reverse the respiratory depression, miosis, and sedation of opioid toxicity; it is titrated to restore adequate breathing while watching for re-sedation and withdrawal. Flumazenil reverses benzodiazepines, activated charcoal is a gut decontaminant not used for airway-compromised obtunded patients, and physostigmine targets anticholinergic toxicity.
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?
- Naloxone
- Beta-blockers as the first agent
- An opioid analgesic
- Benzodiazepines
Correct answer: Benzodiazepines
Benzodiazepines are first-line for sympathomimetic (stimulant such as cocaine or methamphetamine) toxicity because they calm agitation, lower heart rate and blood pressure, reduce temperature, and protect against seizures. Selective beta-blockers alone are avoided because of concern for unopposed alpha stimulation. Naloxone treats opioid, not stimulant, toxicity, and opioids would not address the agitation.
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:
- Osmotic demyelination
- Hypoglycemia
- Wernicke encephalopathy
- Refeeding hyperkalemia
Correct answer: Wernicke encephalopathy
Thiamine is given before or with IV glucose in malnourished or chronic alcohol-using patients to prevent precipitating Wernicke encephalopathy, because a glucose load consumes already-depleted thiamine stores. The classic triad is confusion, ataxia, and ophthalmoplegia. The sequence is not aimed at potassium shifts, hypoglycemia, or sodium correction.
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?
- Immediate vasopressor infusion before any fluids
- Diuretic therapy to improve urine output
- Rapid isotonic crystalloid resuscitation
- Free water restriction
Correct answer: Rapid isotonic crystalloid resuscitation
The priority is rapid isotonic crystalloid resuscitation (such as 0.9 percent saline or a balanced solution) to restore intravascular volume and perfusion in a patient with fluid-loss hypovolemia. Vasopressors are added only if hypotension persists after adequate fluids, and diuretics or water restriction would worsen the volume depletion that is causing 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?
- Give a large bolus of insulin to clear the gap faster
- Switch to hypotonic free water only
- Stop the insulin infusion entirely
- Add dextrose to the IV fluids while continuing the insulin infusion
Correct answer: Add dextrose to the IV fluids while continuing the insulin infusion
When glucose reaches about 200 to 250 mg/dL in DKA but ketosis is still present, dextrose is added to the fluids so the insulin infusion can continue safely to clear ketones without causing hypoglycemia. Stopping insulin prematurely lets the acidosis persist, hypotonic free water alone does not address the ketosis, and a large insulin bolus risks hypoglycemia and hypokalemia.
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
- 19 percent
- 46 percent
- 28 percent
Correct answer: 28 percent
The estimate is 28 percent. By the adult rule of nines, an entire arm (front and back surfaces combined) equals 9 percent, the anterior trunk equals 18 percent, and the genitalia (perineum) equals 1 percent, so 9 plus 18 plus 1 equals 28 percent. Counting only the anterior trunk and genitalia while omitting the involved arm would underestimate the burn at 19 percent.
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?
- 28 percent
- 37 percent
- 10 percent
- 19 percent
Correct answer: 19 percent
The estimate is 19 percent. In the adult rule of nines each entire leg equals 18 percent, so the anterior surface of one leg is 9 percent; both anterior legs total 18 percent, and the perineum (genitalia) adds 1 percent, giving 19 percent. Counting an entire leg as 18 percent here would overestimate because only the front surface is 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?
- 9,600 mL
- 4,800 mL
- 6,000 mL
- 2,400 mL
Correct answer: 4,800 mL
The correct volume is 4,800 mL in the first 8 hours. The Parkland formula gives 4 mL times 80 kg times 30 percent, which equals 9,600 mL over 24 hours; half of that total is delivered in the first 8 hours from the time of the burn, equaling 4,800 mL. The 9,600 mL figure is the full 24-hour total, not the 8-hour portion, and timing is measured from injury, not arrival.
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?
- Pain out of proportion, worsened by passive stretch
- Pulselessness of the dorsalis pedis
- Paralysis of the foot
- Pallor of the foot
Correct answer: Pain out of proportion, worsened by passive stretch
Pain out of proportion to injury, intensified by passive stretching of the muscles in the affected compartment, is the earliest and most reliable sign of acute compartment syndrome. Among the 6 P's (pain, paresthesia, pallor, pulselessness, paralysis, poikilothermia), pulselessness, pallor, and paralysis are late and unreliable findings that often appear only after irreversible damage, so waiting for them delays limb-saving 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?
- Continued observation, since the delta pressure is within normal limits
- Application of ice and a compressive wrap to the compartment
- Elevation of the limb above heart level to lower the pressure
- Emergent fasciotomy, since the delta pressure is 30 mmHg or less
Correct answer: Emergent fasciotomy, since the delta pressure is 30 mmHg or less
Emergent fasciotomy is anticipated because the delta pressure is 30 mmHg or less. Delta pressure equals diastolic blood pressure minus compartment pressure (70 minus 45 equals 25 mmHg), and a value of 30 mmHg or below indicates inadequate tissue perfusion requiring surgical decompression. Elevating the limb to heart level (not above) is appropriate, but raising it higher lowers arterial inflow and worsens ischemia, and ice or compression further reduces perfusion.
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?
- Immediate hemodialysis regardless of potassium level
- Administration of a loop diuretic to force diuresis
- Aggressive isotonic crystalloid infusion titrated to maintain high urine output
- Restriction of intravenous fluids to avoid volume overload
Correct answer: Aggressive isotonic crystalloid infusion titrated to maintain high urine output
Aggressive isotonic crystalloid (such as normal saline or lactated Ringer's) titrated to maintain a urine output of roughly 200 mL per hour or more is the priority to prevent myoglobin-induced acute kidney injury in rhabdomyolysis. Early, large-volume fluid resuscitation flushes nephrotoxic myoglobin through the tubules. Loop diuretics and fluid restriction reduce the protective urine flow, and dialysis is reserved for refractory hyperkalemia, severe acidosis, or established renal failure, not routine initial therapy.
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?
- Oral sodium polystyrene sulfonate
- Nebulized albuterol
- Intravenous calcium gluconate
- Intravenous insulin with dextrose
Correct answer: Intravenous calcium gluconate
Intravenous calcium gluconate is given first when rhabdomyolysis causes hyperkalemia with ECG changes such as peaked T waves and QRS widening. Calcium stabilizes the cardiac cell membrane and protects against lethal arrhythmias within minutes, although it does not lower the potassium level. Insulin with dextrose and albuterol shift potassium intracellularly but act more slowly, and a binding resin removes potassium over hours.
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?
- Transverse fracture
- Comminuted fracture
- Oblique fracture
- Greenstick fracture
Correct answer: Comminuted fracture
A comminuted fracture is one in which the bone is shattered into three or more fragments, typically from high-energy trauma. A greenstick fracture is an incomplete break seen mainly in children, a transverse fracture runs straight across the bone shaft, and an oblique fracture runs at an angle, none of which involve 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?
- Spiral fracture
- Greenstick fracture
- Comminuted fracture
- Pathologic fracture
Correct answer: Greenstick fracture
A greenstick fracture is an incomplete fracture in which one side of the bone breaks while the opposite cortex bends but remains intact, occurring almost exclusively in children because of their more pliable bones. A spiral fracture results from a twisting force, a pathologic fracture occurs through diseased bone, and a comminuted fracture produces multiple fragments.
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?
- Manually reducing the bone back beneath the skin to restore alignment
- Applying a tight tourniquet proximal to the fracture for transport
- Covering the wound with a sterile moist dressing and administering antibiotics and tetanus prophylaxis
- Vigorously scrubbing the exposed bone with antiseptic at the bedside
Correct answer: Covering the wound with a sterile moist dressing and administering antibiotics and tetanus prophylaxis
Covering the open fracture with a sterile moist dressing and giving prompt antibiotics plus tetanus prophylaxis is the priority because open fractures carry a high infection and osteomyelitis risk. Scrubbing the bone at the bedside causes further contamination and tissue injury, manually reducing exposed bone draws contaminants into the wound, and a tourniquet is reserved for uncontrolled life-threatening hemorrhage, not routine open-fracture care.
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?
- Placing the patient in high Fowler's position
- Applying a pelvic binder centered over the greater trochanters
- Performing manual spring testing of the pelvis to confirm instability
- Log-rolling the patient repeatedly to inspect the flanks
Correct answer: Applying a pelvic binder centered over the greater trochanters
Applying a pelvic binder centered over the greater trochanters is anticipated to stabilize an unstable pelvic fracture, reduce pelvic volume, and tamponade venous bleeding. Repeated log-rolling and manual spring (compression-distraction) testing can disrupt forming clots and worsen hemorrhage, and a high Fowler's position offers no hemodynamic benefit for pelvic bleeding.
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?
- Range of motion of the contralateral shoulder
- Axillary nerve sensation over the lateral deltoid and distal pulses
- Capillary refill of the toes
- Grip strength of both hands compared
Correct answer: Axillary nerve sensation over the lateral deltoid and distal pulses
Assessing axillary nerve function (sensation over the lateral deltoid) and distal circulation before and after reduction is most critical because the axillary nerve and surrounding vessels are at high risk of injury with anterior shoulder dislocation and during the reduction maneuver. Documenting neurovascular status both before and after detects any new deficit caused by the dislocation or the procedure.
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 until surgery
- Placed directly on ice so it is fully submerged in ice water
- Wrapped in saline-moistened gauze, sealed in a bag, and placed on ice without direct contact
- Wrapped in dry gauze and kept at room temperature
Correct answer: Wrapped in saline-moistened gauze, sealed in a bag, and placed on ice without direct contact
The amputated part should be wrapped in saline-moistened sterile gauze, placed in a sealed plastic bag, and then set on ice so it stays cool without freezing or direct ice contact. Direct contact with ice or ice water causes frostbite and tissue damage that compromises replantation, keeping the part at room temperature accelerates ischemia, and antiseptic soaks injure the tissue.
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?
- Placement of a nasogastric tube to decompress the stomach
- Application of a circumferential compression dressing
- Administration of a bronchodilator
- Escharotomy of the chest wall
Correct answer: Escharotomy of the chest wall
Escharotomy of the chest wall is anticipated because circumferential full-thickness burns form a rigid, inelastic eschar that restricts chest expansion and impairs ventilation as edema increases. Incising the eschar releases the constriction and restores chest wall compliance. A compression dressing would worsen the restriction, and bronchodilators or gastric decompression do not relieve the external mechanical limitation.
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?
- The wound is a clean surgical-type incision
- The wound is contaminated and presented more than 6 hours from injury would be the only concern
- The laceration is on the volar rather than dorsal surface
- The wound is contaminated with soil and may need delayed closure plus tetanus assessment
Correct answer: The wound is contaminated with soil and may need delayed closure plus tetanus assessment
Contamination with soil markedly increases infection risk and may warrant irrigation, delayed (rather than immediate) primary closure, and assessment of tetanus immunization status. Soil and organic debris introduce bacteria, including Clostridium tetani, so the wound is not treated like a clean incision; the anatomic surface (volar versus dorsal) is far less important than the contamination itself.
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?
- Acute coronary syndrome
- Acute pericarditis
- Pulmonary embolism
- Costochondritis
Correct answer: Costochondritis
Costochondritis is the best explanation because the hallmark is chest wall pain that is reproducible with palpation over the costochondral or costosternal junctions and worsens with movement or deep inspiration, in the setting of a normal ECG and troponin. Pericarditis, pulmonary embolism, and acute coronary syndrome are not reliably reproduced by chest wall palpation and would be expected to show ECG, troponin, or oxygenation abnormalities.
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?
- Osteomyelitis
- A simple cellulitis that needs no imaging
- Gouty arthritis
- Plantar fasciitis
Correct answer: Osteomyelitis
Osteomyelitis is most consistent with these findings because a deep puncture wound in a patient with diabetes that progresses to chronic drainage, local warmth, tenderness, and fever signals bone infection, which warrants imaging, inflammatory markers, and prolonged antibiotics. Plantar fasciitis and gout are noninfectious, and labeling this a simple cellulitis needing no imaging would miss the underlying bone involvement seeded by the puncture.
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?
- Sciatica from a mild disc bulge
- Sacroiliac joint dysfunction
- Mechanical lumbar strain
- Cauda equina syndrome
Correct answer: Cauda equina syndrome
Cauda equina syndrome is the surgical emergency here because saddle anesthesia, new urinary retention or incontinence, and decreased rectal tone are red-flag signs of compression of the lumbosacral nerve roots, requiring emergent MRI and decompression to prevent permanent deficits. A simple lumbar strain, ordinary sciatica, and sacroiliac dysfunction do not produce bowel or bladder dysfunction with saddle anesthesia.
While documenting a soft-tissue injury, the emergency nurse needs to distinguish a sprain from a strain. Which description correctly defines a sprain?
- An inflammation of a bursa near a joint
- A complete break in the continuity of a bone
- An overstretching or tearing of a ligament at a joint
- An overstretching or tearing of a muscle or tendon
Correct answer: An overstretching or tearing of a ligament at a joint
A sprain is correctly defined as the overstretching or tearing of a ligament, the tissue that connects bone to bone at a joint, commonly from a twisting or wrenching force. A break in bone continuity is a fracture, stretching or tearing of a muscle or tendon defines a strain, and inflammation of a bursa is bursitis.
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?
- Pseudomonas aeruginosa
- Group A Streptococcus only
- Clostridioides difficile
- Bordetella pertussis
Correct answer: Pseudomonas aeruginosa
Pseudomonas aeruginosa is the specific concern because plantar puncture wounds through rubber footwear are classically associated with Pseudomonas inoculation and a heightened risk of pseudomonal osteomyelitis or osteochondritis, so antibiotic choice should provide antipseudomonal coverage. C. difficile is an antibiotic-associated colitis organism, pertussis is respiratory, and limiting concern to Group A Streptococcus alone ignores the well-known sneaker-puncture pseudomonal risk.
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
- Stage 1 pressure injury
- Stage 3 pressure injury
- Stage 2 pressure injury
Correct answer: Stage 3 pressure injury
This is a Stage 3 pressure injury because there is full-thickness skin loss with visible adipose (fat) tissue while no muscle, tendon, ligament, or bone is exposed. A Stage 1 injury is intact skin with nonblanchable redness, a Stage 2 injury is partial-thickness loss with an exposed dermis or intact blister, and a Stage 4 injury exposes muscle, tendon, or bone.
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?
- Sciatic nerve
- Axillary nerve
- Obturator nerve
- Femoral nerve
Correct answer: Sciatic nerve
The sciatic nerve is most at risk because it runs directly posterior to the hip joint, so a posterior hip dislocation, which classically presents with the limb flexed, adducted, and internally rotated, can stretch or compress it, producing foot drop and lateral leg sensory loss. The femoral and obturator nerves lie anteriorly and medially, and the axillary nerve is a shoulder structure unrelated to the hip.
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?
- Apply the splint as tightly as possible to prevent any swelling
- Immobilize the joints both above and below the fracture site
- Reduce and realign the bone fully before any splint is applied
- Immobilize the fracture site only, leaving both adjacent joints free to move
Correct answer: Immobilize the joints both above and below the fracture site
The correct principle is to immobilize the joints both above and below the fracture site, which prevents movement of the bone fragments and reduces pain, further soft-tissue injury, and neurovascular compromise. Splinting only the fracture site allows the adjacent joints to move the fragments, an overly tight splint can cause compartment compromise as swelling develops, and field reduction is not required before splinting.
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?
- Closed tightly with sutures right away because human bites rarely become infected
- Treated as high infection risk, irrigated and usually left open, with prophylactic antibiotics
- Managed with antibiotics only if redness appears after 48 hours
- Discharged with a simple adhesive bandage and no antibiotics
Correct answer: Treated as high infection risk, irrigated and usually left open, with prophylactic antibiotics
A human bite to the hand should be anticipated as a high infection risk and is irrigated, debrided, and usually left open rather than sutured tightly, with prophylactic antibiotics covering organisms such as Eikenella. Human bites, especially over the knuckles, are more prone to serious infection than many other wounds, so immediate tight closure, a simple bandage alone, or withholding antibiotics until redness appears would be unsafe.
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?
- Retinal detachment of the inferior quadrant
- Central retinal artery occlusion
- Acute angle-closure glaucoma
- Optic neuritis
Correct answer: Central retinal artery occlusion
Central retinal artery occlusion classically produces sudden, painless, monocular vision loss occurring over seconds, often described as a curtain or shade coming down, and is frequently embolic in origin, which fits this patient's atrial fibrillation. Acute angle-closure glaucoma is painful with a red eye, headache, nausea, and halos rather than painless loss. Optic neuritis causes pain with eye movement and a slower, often subacute decline. The embolic history and painless, instantaneous monocular loss point to a retinal vascular occlusion treated as an ocular stroke.
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 warm compresses to the affected globe
- Eye patching of both eyes with strict bed rest for 24 hours
- Topical pilocarpine drops to constrict the pupil
- Intermittent digital ocular massage and acetazolamide to lower intraocular pressure
Correct answer: Intermittent digital ocular massage and acetazolamide to lower intraocular pressure
Intermittent digital ocular massage and intravenous or oral acetazolamide are common temporizing measures aimed at dislodging an embolus and lowering intraocular pressure to improve retinal perfusion while definitive care (including possible intravenous thrombolysis at a stroke center) is arranged. Pilocarpine treats angle-closure glaucoma, not arterial occlusion. Warm compresses and bilateral patching have no role and only delay reperfusion. Because CRAO is treated as a stroke of the eye, rapid activation rather than passive rest is the priority.
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?
- Sudden occlusion of the central retinal vein
- Rupture of bridging vessels in the subhyaloid space
- Obstruction of aqueous humor outflow at the iridocorneal angle
- Detachment of the neurosensory retina from the choroid
Correct answer: Obstruction of aqueous humor outflow at the iridocorneal angle
Obstruction of aqueous humor outflow at the iridocorneal angle is the mechanism of acute angle-closure glaucoma: the peripheral iris blocks the trabecular meshwork, aqueous cannot drain, and intraocular pressure rises rapidly, producing pain, a mid-dilated fixed pupil, corneal edema, halos, nausea, and vomiting. A central retinal vein occlusion causes painless visual changes, not an acutely hard, painful eye. Retinal detachment is painless with flashes and floaters. The classic nighttime onset reflects physiologic pupil dilation in dim light worsening the angle blockage.
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?
- Lifelong topical beta-blocker drops
- Scleral buckle placement
- Laser peripheral iridotomy
- Intravitreal anti-VEGF injection
Correct answer: Laser peripheral iridotomy
Laser peripheral iridotomy is the definitive treatment for acute angle-closure glaucoma because it creates a small opening in the iris that restores aqueous flow and relieves the pupillary block; it is also performed prophylactically on the fellow eye, which is anatomically predisposed. Topical beta-blockers and other drops only temporarily lower pressure and do not correct the anatomic block. A scleral buckle treats retinal detachment, and anti-VEGF therapy treats neovascular and macular disease, neither of which addresses angle closure.
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?
- Laryngotracheobronchitis (croup)
- Retropharyngeal hematoma
- Acute viral pharyngitis
- Peritonsillar abscess
Correct answer: Peritonsillar abscess
Peritonsillar abscess is the classic cause of a muffled hot-potato voice, trismus, drooling, and contralateral uvular deviation from a unilateral collection of pus beside the tonsil pushing the uvula away from the affected side. Viral pharyngitis is bilateral and does not cause trismus or uvular shift. Croup is a pediatric subglottic illness with a barky cough and stridor. The unilateral peritonsillar bulge with uvular deviation distinguishes this abscess from simple pharyngitis and is typically managed with needle aspiration or incision and drainage plus antibiotics.
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?
- Suction and airway management equipment
- A warming blanket and forced-air warmer
- Continuous bladder irrigation supplies
- A 12-lead ECG machine
Correct answer: Suction and airway management equipment
Suction and airway management equipment must be immediately available because aspiration of purulent material near the airway risks aspiration, and rare but possible carotid injury or worsening edema can compromise the airway. Suction also keeps the field clear so the provider can identify the abscess pocket. A warming blanket, ECG machine, and bladder irrigation supplies do not address the immediate procedural and airway risks of a peritonsillar drainage. Protecting the airway and managing secretions are the nurse's foremost concerns during oropharyngeal drainage.
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?
- Septic embolization to the lungs
- Acute compartment syndrome of the neck musculature
- Rapidly progressive airway obstruction
- Aspiration pneumonitis from gastric contents
Correct answer: Rapidly progressive airway obstruction
Rapidly progressive airway obstruction is the greatest threat in Ludwig's angina, a diffuse cellulitis of the bilateral submandibular, sublingual, and submental spaces; posterior and superior displacement of the tongue and floor-of-mouth swelling can occlude the airway, and asphyxiation is the leading cause of death. While the infection can spread and cause sepsis, the immediate killer is loss of the airway. The brawny bilateral neck swelling with tongue elevation should trigger early, controlled airway planning.
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?
- Awake fiberoptic intubation with surgical airway backup
- Deferral of any airway intervention until CT imaging is completed
- Rapid sequence induction with a standard direct laryngoscopy attempt
- Insertion of a supraglottic (laryngeal mask) airway as the definitive airway
Correct answer: Awake fiberoptic intubation with surgical airway backup
Awake fiberoptic intubation with immediate surgical airway backup (cricothyrotomy or tracheostomy) is preferred in Ludwig's angina because distorted anatomy, trismus, and edema make direct laryngoscopy difficult and giving paralytics risks a can't-intubate, can't-ventilate emergency. A supraglottic airway does not bypass the supraglottic swelling and is not definitive here. Delaying the airway for imaging in a deteriorating patient is dangerous; the airway is secured first, often awake, with a surgeon at the bedside.
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?
- Have the patient lean forward and apply firm continuous pressure to the soft anterior nostrils for at least 10 to 15 minutes
- Lay the patient flat and tilt the head back to slow the bleeding
- Apply silver nitrate cautery to both sides of the septum simultaneously
- Immediately pack both nares with petrolatum gauze
Correct answer: Have the patient lean forward and apply firm continuous pressure to the soft anterior nostrils for at least 10 to 15 minutes
Having the patient lean forward and pinch the soft cartilaginous part of the nose with firm continuous pressure for at least 10 to 15 minutes is the first-line maneuver for anterior epistaxis, compressing the Kiesselbach plexus and allowing clot formation. Leaning forward prevents blood from draining posteriorly and being swallowed or aspirated, so tilting the head back is incorrect. Packing and cautery are escalations used only after direct pressure and a topical vasoconstrictor fail. Bilateral simultaneous septal cautery risks septal perforation and is avoided.
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?
- Intranasal normal saline mist
- Nebulized albuterol
- Topical timolol drops
- Oxymetazoline applied to the nasal mucosa
Correct answer: Oxymetazoline applied to the nasal mucosa
Oxymetazoline, an alpha-adrenergic agonist, is applied topically to constrict nasal mucosal vessels and stops bleeding in a large proportion of emergency department epistaxis cases, making it the standard next step after direct pressure. Albuterol is a bronchodilator with no hemostatic effect. Timolol is a glaucoma drop, not a nasal vasoconstrictor. Saline mist provides no vasoconstriction. Topical vasoconstriction, often combined with continued pressure, frequently controls anterior bleeding before cautery or packing is needed.
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?
- Application of ice directly to the packing for the duration of treatment
- Routine outpatient discharge within one hour of placement
- Close monitoring for airway compromise and hypoxia, often with admission and cardiorespiratory monitoring
- Immediate removal of the pack if the patient reports any discomfort
Correct answer: Close monitoring for airway compromise and hypoxia, often with admission and cardiorespiratory monitoring
Close monitoring for airway compromise and hypoxia, frequently with admission and continuous cardiorespiratory monitoring, is required because posterior packs can dislodge, obstruct the airway, and have been associated with hypoxia and a vasovagal or so-called nasopulmonary reflex. Posterior bleeds are more dangerous than anterior bleeds and warrant ENT involvement and observation. Routine rapid discharge is unsafe, and the pack should not be removed simply because of expected discomfort, since premature removal can cause rebleeding.
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?
- Allergic rhinitis
- A retained nasal foreign body
- Bilateral acute bacterial sinusitis
- A cerebrospinal fluid leak
Correct answer: A retained nasal foreign body
A retained nasal foreign body should be suspected with any unilateral, foul-smelling, purulent nasal discharge in a young child, a classic teaching point because objects placed in one nostril cause localized irritation and infection. Sinusitis and allergic rhinitis are typically bilateral and not foul-smelling and unilateral. A CSF leak produces clear, watery drainage, not purulent malodorous discharge. Recognizing this pattern prompts removal, and button batteries or paired magnets require urgent removal because of tissue necrosis risk.
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?
- Observation for spontaneous passage over 24 to 48 hours
- Urgent removal because of the risk of liquefactive necrosis and septal perforation
- Discharge with outpatient ENT follow-up in one week
- Irrigation of the nostril with copious water before any attempt at removal
Correct answer: Urgent removal because of the risk of liquefactive necrosis and septal perforation
Urgent removal is required for a nasal button battery because an electrical current and alkaline leakage cause rapid liquefactive necrosis that can perforate the septum and damage surrounding tissue within hours. Delaying for outpatient follow-up or awaiting spontaneous passage allows progressive injury. Flushing the nose with water before removal can accelerate the caustic reaction and is avoided. The emergency nurse should treat a nasal or aural button battery as a time-sensitive emergency.
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?
- Immunocompetent children, caused by respiratory syncytial virus
- Healthy adults, caused by Candida albicans
- Older adults with diabetes, caused by Pseudomonas aeruginosa
- Young athletes, caused by Staphylococcus epidermidis
Correct answer: Older adults with diabetes, caused by Pseudomonas aeruginosa
Necrotizing otitis externa occurs most often in older adults with poorly controlled diabetes or other immunocompromise and is most commonly caused by Pseudomonas aeruginosa, which spreads from the ear canal to the skull base and can cause cranial nerve palsies and osteomyelitis. It is not a benign swimmer's-ear staphylococcal infection. Identifying severe ear pain out of proportion, granulation tissue in the canal, and a diabetic host prompts urgent imaging, intravenous antibiotics, and ENT consultation.
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?
- Immediate cautery of the ear cartilage
- Prompt drainage of the auricular hematoma followed by a compressive dressing
- Application of a warm compress and outpatient follow-up only
- Antibiotic ointment with no drainage
Correct answer: Prompt drainage of the auricular hematoma followed by a compressive dressing
Prompt drainage of the auricular hematoma followed by a compressive bolster dressing is needed to prevent cauliflower ear, the deformity that develops when blood separates the perichondrium from the cartilage and the cartilage loses its blood supply, leading to fibrosis and new cartilage formation. A warm compress alone or antibiotic ointment without drainage allows the hematoma to persist and deform the ear. Cautery of cartilage is not indicated. Re-accumulation is common, so close follow-up and a secure dressing matter.
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 canal
- The middle ear ossicles
- The frontal lobe of the cerebral cortex
- The inner ear (vestibular apparatus)
Correct answer: The inner ear (vestibular apparatus)
The inner ear vestibular apparatus, the semicircular canals and otolith organs, is the structure responsible for peripheral vertigo, which classically produces severe positional spinning, nausea, and vomiting. The middle ear ossicles and external canal transmit sound and do not generate balance signals. Cortical structures relate to central, not peripheral, causes. Distinguishing peripheral vertigo from a central cause such as a cerebellar stroke is a key triage decision, since a central pattern with focal neurologic signs demands stroke evaluation.
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?
- Development of acute angle-closure glaucoma
- Permanent loss of the sense of smell
- Rupture of the tympanic membrane causing immediate deafness
- Intracranial spread of infection, such as meningitis or a brain abscess
Correct answer: Intracranial spread of infection, such as meningitis or a brain abscess
Intracranial spread of infection, including meningitis, epidural or brain abscess, and venous sinus thrombosis, is the chief concern with mastoiditis because the mastoid air cells lie adjacent to the cranial cavity. Postauricular swelling with a protruding auricle signals that otitis media has extended into bone, requiring intravenous antibiotics, imaging, and ENT consultation. Mastoiditis does not cause anosmia or angle-closure glaucoma, and while hearing can be affected, the emergent worry is intracranial extension rather than an isolated tympanic rupture.
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?
- Complete cessation of the drainage when the patient lies supine
- A halo or ring sign when the fluid is placed on filter paper and a positive glucose result
- A foul odor and green color to the fluid
- Bright red blood that clots quickly on the upper lip
Correct answer: A halo or ring sign when the fluid is placed on filter paper and a positive glucose result
A halo or ring sign, in which blood-tinged fluid spreads into a clear outer ring on filter paper, along with a positive glucose test (with beta-2 transferrin assay as the definitive confirmation), supports cerebrospinal fluid rhinorrhea, because CSF contains glucose and separates from blood on absorbent paper. Foul green discharge suggests infection or foreign body, not CSF. CSF leakage often increases when leaning forward and does not simply stop when supine. Recognizing a CSF leak matters because it signals a skull base injury with infection risk and warrants avoiding nasal instrumentation.

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By Career EmployerUpdated Jun 7, 2026

CEN Question of the DayNew daily

1 of 390+ free questions — a new one every day

Which of the following is the most significant risk factor for ectopic pregnancy?

Pick an answer to see the explanation

Click Start Test above to launch a full-length CEN practice test weighted exactly like the real exam, or drill a single clinical domain — cardiovascular, respiratory, neurological, and the rest of the 11 areas BCEN tests. Every question includes a clear rationale so you learn the reasoning, not just the answer.

The CEN exam — the Certified Emergency Nurse credential — is administered by the Board of Certification for Emergency Nursing (BCEN) and is the national certification for emergency nurses.^[2] These free CEN practice questions and test prep mirror the current Examination Content Outline so you practice the way the real exam is built.^[1] Pair them with our free study guide, flashcards for full coverage.

CEN at a Glance

CEN Exam at a glance
Detail	CEN Exam
Questions	175 total (150 scored + 25 unscored pretest)
Question type	Multiple choice (single best answer)
Time limit	3 hours (180 minutes seat time)
Result	Pass/Fail — approximately 106 of 150 scored items required
Administered by	BCEN, via Pearson VUE (computer-based at test centers or online with live remote proctoring)
Eligibility	Current, unrestricted RN license (US, US territory, Canada, Australia, or equivalent); 2 years of emergency nursing experience recommended but not required
Cost	≈ $285 ENA member /$ 380 non-member; ≈ $195 active-duty military (verify at bcen.org)
Validity / renewal	4 years — renew by retesting or by completing continuing education (CEN Renewal / 100 CE points)

What Is on the CEN Exam?

The CEN exam covers 11 weighted clinical domains defined in the official BCEN Examination Content Outline (150 scored items), led by cardiovascular, respiratory, and neurological emergencies.^[1]

Our full practice test mirrors these weights so you train in the same proportions BCEN tests:

CEN weighting by clinical domain

Cardiovascular Emergencies12% · ≈4 Qs

Respiratory Emergencies11% · ≈3 Qs

Neurological Emergencies11% · ≈3 Qs

Medical Emergencies10% · ≈3 Qs

Gastrointestinal Emergencies9% · ≈3 Qs

Mental Health Emergencies9% · ≈3 Qs

Environment, Toxicology & Communicable Diseases9% · ≈3 Qs

Professional Issues8% · ≈2 Qs

Musculoskeletal & Wound Emergencies7% · ≈2 Qs

Genitourinary, Gynecology & Obstetrical Emergencies7% · ≈2 Qs

Head, Eye, Ear, Nose & Throat Emergencies7% · ≈2 Qs

Practice Questions by Domain

Use Start Test for a full weighted CEN simulation, or open the hub and pick a single domain to drill your weak area. After each full exam, your results show a per-domain breakdown so you know exactly where to focus — most candidates need the most reps on cardiovascular, respiratory, and neurological emergencies.

What Are the Requirements to Take the CEN?

To take the CEN exam you must hold a current, unrestricted Registered Nurse (RN) license in the United States, a US territory, Canada, Australia, or an equivalent RN license.^[3] International candidates with foreign credentials must complete a credential evaluation, and there is no degree requirement beyond RN licensure.

BCEN does not impose a strict experience requirement to sit for the exam, but strongly recommends a minimum of two years of emergency nursing practice before testing because the exam reflects real-world emergency department competencies.

How Do You Register for the CEN Exam?

You register for the CEN through your BCEN account at bcen.org — create a profile, confirm eligibility, complete the application, and submit payment of approximately $285 for ENA members or $380 for non-members (reduced fees apply for active-duty military and veterans).^[4]

Once BCEN approves your application you receive an eligibility email and a 90-day testing window in which to schedule and sit the exam through Pearson VUE — at a test center or online with live remote proctoring. Results are provided immediately at the end of the exam.

What Is the Passing Score for the CEN?

The passing score for the CEN is approximately 106 of the 150 scored items correct — about 71% — set by a criterion-referenced standard from BCEN’s role delineation study.^[1]

The exam contains 175 items, of which 150 are scored and 25 are unscored pretest questions mixed throughout that do not affect your result. The result is reported as pass/fail and is available immediately after you finish.

There is no penalty for guessing, so answer every question.

How Hard Is the CEN? (Pass Rate)

BCEN’s published exam statistics put the CEN first-attempt pass rate at roughly 49% in recent years, making it one of the more challenging emergency nursing certifications.^[5]The relatively low pass rate reflects the exam’s broad clinical scope — 11 domains covering virtually every body system plus professional practice — and the requirement to answer about 71% of scored items correctly. Candidates who pass typically have hands-on emergency department experience and prepare with full-length, content-weighted practice tests.

~49%

First-attempt pass rate

one of the tougher RN certs

~106/150

Scored items to pass

about 71% correct

Weighted domains

every body system + practice

The takeaway: drill until you’re consistently scoring above target on full-length practice — especially cardiovascular, respiratory, and neurological emergencies — before you book your exam date.

What Should You Expect on CEN Exam Day?

On CEN exam day you arrive at your Pearson VUE test center at least 15 minutes early to check in with a valid, unexpired government-issued photo ID whose name matches your BCEN application, then get 3 hours to answer 175 multiple-choice questions.^[3]

You’ll store phones and personal items in a locker; no notes are allowed, but you’re given scratch material for working through scenarios. A short tutorial precedes the exam, and there are no scheduled breaks.

If you test via online proctoring, expect a similar check-in and ID scan. Your pass/fail result posts immediately at the end of the computer-based exam. Having simulated the full timing with practice tests makes that clock feel routine.

How to Use This CEN Practice Test

Recreate exam conditions. Take the full test timed, with no notes.
Diagnose, then drill. Use a full CEN simulation to find weak domains, then drill them.
Prioritize the big three. Cardiovascular, respiratory, and neurological are the biggest score-movers.
Learn the why. Read every rationale — understanding beats memorizing.
Answer everything. There’s no guessing penalty, so never leave a question blank.

Why Get CEN Certified?

The CEN is the most widely recognized emergency nursing certification, often required (or strongly preferred) by employers and tied to higher pay and advancement.^[2] These free CEN practice tests are the most efficient way to get there.

Conclusion

Passing the CEN comes down to broad, rapid command of emergency nursing across all 11 domains. Use this free CEN practice test with our study guide, flashcards to find your weak domains, drill them to mastery, and walk in confident on test day.

CEN Practice Test FAQ

The CEN exam has 175 questions total — 150 scored plus 25 unscored pretest items — and you have 3 hours (180 minutes of seat time) to complete it. All questions are multiple choice with a single best answer, delivered as a computer-based test through Pearson VUE at a test center or online with live remote proctoring.

References

1.BCEN. “Certified Emergency Nurse (CEN) Examination Content Outline (Effective July 2026).” bcen.org. ↑
2.BCEN. “CEN Certification for Emergency Nurses.” bcen.org. ↑
3.BCEN. “The CEN Certification Process.” bcen.org. ↑
4.BCEN. “The Cost of a CEN Certification.” bcen.org. ↑
5.BCEN. “Certification Exam Statistics.” bcen.org. ↑

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