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Certified Emergency Nurse Flashcards

7 cards from real CEN practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. A patient presents with chest pain radiating to the left arm, diaphoresis, and nausea. The 12-lead ECG shows ST elevation in leads II, III, and aVF. Which coronary artery is most likely occluded?

    Answer: Right coronary artery

    ST elevation in leads II, III, and aVF indicates an inferior STEMI, most commonly caused by right coronary artery occlusion.

  2. A 3-year-old is brought in after ingesting an unknown substance. The child has pinpoint pupils, bradycardia, excessive secretions, and bronchospasm. Which antidote is most appropriate?

    Answer: Atropine

    The SLUDGE/DUMBELS toxidrome indicates organophosphate or cholinergic poisoning, treated with atropine to block muscarinic effects.

  3. A patient with a known history of COPD is in respiratory distress. SpO2 is 84%. Which oxygen delivery target is most appropriate for this patient?

    Answer: SpO2 88-92% via controlled oxygen delivery

    COPD patients may rely on hypoxic drive; targeting SpO2 88-92% prevents CO2 retention while maintaining adequate oxygenation.

  4. During a rapid sequence intubation, succinylcholine is contraindicated in which of the following patients?

    Answer: Patient with a crush injury 72 hours prior

    Succinylcholine is contraindicated in crush injuries (>24-48 hours), burns, and denervation injuries due to risk of life-threatening hyperkalemia from upregulated acetylcholine receptors.

  5. A patient presents with sudden severe headache described as 'the worst headache of my life,' neck stiffness, and photophobia. The CT scan is negative. What is the next priority intervention?

    Answer: Perform lumbar puncture to assess for xanthochromia

    A thunderclap headache with a negative CT warrants lumbar puncture to detect xanthochromia, indicating subarachnoid hemorrhage.

  6. A patient is brought in post-lightning strike and is pulseless. Which finding is unique to lightning injury compared to other cardiac arrest etiologies?

    Answer: Asystole is the most common arrest rhythm

    Unlike most cardiac arrests, lightning strike most commonly causes asystole due to massive depolarization of cardiac cells.

  7. A patient with suspected cardiac tamponade has Beck's triad. Which finding is NOT part of Beck's triad?

    Answer: Tracheal deviation

    Beck's triad consists of hypotension, muffled heart sounds, and JVD; tracheal deviation is associated with tension pneumothorax.