AACN CCRN Adult Certification Examination Practice Test
The AACN CCRN Adult Certification Examination centers on critical care nursing for acutely and critically ill adults. Practice-bank scenarios involve recognizing instability and prioritizing interventions across cardiovascular, respiratory, neurologic, metabolic, and gastrointestinal problems, including medication effects, acid-base changes, and complications of surgery or intensive treatment.
Exam overview
About the AACN CCRN Adult Certification Examination Exam
Adult critical care decisions require interpreting trends rather than isolated readings. Nurses connect vital signs, mental status, arterial blood gases, glucose, electrolytes, and treatment response to identify deterioration and escalate care. Relevant clinical work includes prioritizing airway and breathing support, managing hemodynamic instability, preventing complications of mechanical ventilation, and responding to neurologic emergencies. Scenarios also test medication safety, such as evaluating when to withhold a drug, treating opioid-related respiratory depression, and recognizing insulin-associated hypoglycemia. Fluid balance and electrolyte shifts matter in conditions such as high-output ileostomy and severe hyponatremia. Effective judgment links assessment findings to immediate stabilization, ongoing monitoring, and evaluation of whether an intervention is working.
Sample Practice Questions
Review a selection from this exam's published US Practice Tests practice bank.
A patient with acute coronary syndrome is prescribed sublingual nitroglycerin for chest discomfort. Which finding should prompt the nurse to withhold the dose and urgently clarify the plan?
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Correct answer: ACombining nitrates with phosphodiesterase-5 inhibitors such as sildenafil can cause profound hypotension. The nurse should withhold nitroglycerin and promptly notify the appropriate clinician; exact avoidance intervals depend on the specific drug and clinical guidance.
A patient receiving opioid analgesia after surgery is difficult to arouse, has shallow respirations, and has an oxygen saturation of 88%. Which action is the priority?
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Correct answer: ADepressed consciousness, shallow breathing, and hypoxemia suggest opioid-related respiratory depression. Immediate airway and ventilatory support, urgent escalation, and assessment for reversal therapy as prescribed take priority over routine measures.
A patient with a new ileostomy has high-volume watery output and reports dizziness when standing. Which complication is the greatest immediate concern?
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Correct answer: AHigh ileostomy output can cause substantial water and electrolyte losses. Orthostatic dizziness may signal intravascular volume depletion, so assess hemodynamics, intake and output, renal function, and electrolytes.
A patient with acute respiratory failure is on high-flow oxygen. The arterial blood gas shows pH 7.28, PaCO₂ 60 mm Hg, and HCO₃⁻ 27 mEq/L. Which acid-base disturbance is most consistent with these results?
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Correct answer: AThe low pH indicates acidemia, and the elevated PaCO₂ identifies a primary respiratory cause. The near-normal bicarbonate suggests little renal compensation, consistent with an acute respiratory acidosis.
A patient with severe hyponatremia has a generalized seizure. Which immediate nursing response is most appropriate?
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Correct answer: ADuring a seizure, protect the patient from injury and support airway and breathing; summon help and prepare for prescribed emergency treatment. Do not restrain the patient or place objects in the mouth. Severe symptomatic hyponatremia requires urgent clinician-directed management.
A patient receiving a continuous IV insulin infusion for hyperglycemia becomes sweaty and confused. A bedside glucose is 48 mg/dL. What is the immediate priority?
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Correct answer: AA glucose of 48 mg/dL with symptoms is clinically significant hypoglycemia. The insulin should be paused and hypoglycemia treated promptly according to the applicable protocol, with repeat glucose monitoring.
A mechanically ventilated patient with severe ARDS is receiving lung-protective ventilation. Which intervention is most likely to reduce ventilator-induced lung injury?
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Correct answer: BLower tidal volumes based on predicted body weight reduce volutrauma and are a foundational component of lung-protective ventilation in ARDS. Ventilation targets should be individualized, with attention to plateau pressure and adequate PEEP.
How to use this practice test
The free US Practice Tests practice set draws up to 20 random questions from its 50-question bank for each session. Answer scenarios involving adult critical care assessment and interventions, then use the results shown after the session to identify which clinical decisions need further review.
Preparation tips
- Practice interpreting arterial blood gases by relating pH, PaCO₂, and bicarbonate to respiratory or metabolic acid-base changes.
- For cardiovascular scenarios, connect symptoms and hemodynamic findings to medication precautions and urgent escalation.
- Review immediate responses to hypoglycemia, seizures, opioid-related respiratory depression, and sudden neurologic decline.
- Compare trends in glucose, fluid losses, oxygenation, and mental status to judge whether treatment is effective or deterioration is occurring.