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Certified Emergency Nurse MCQ 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.

Read the first 7 Certified Emergency Nurse MCQ flashcards as text

  1. A patient presents with 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 (RCA) occlusion.

  2. Which finding on a 12-lead ECG most urgently requires immediate defibrillation?

    Answer: Ventricular fibrillation

    Ventricular fibrillation produces no effective cardiac output and requires immediate unsynchronized defibrillation.

  3. A child presents with inspiratory stridor, a barking cough, and low-grade fever. What is the priority intervention?

    Answer: Administer dexamethasone and allow the child to remain with caregiver

    Croup is managed with corticosteroids (dexamethasone) and keeping the child calm; separating the child from the caregiver increases agitation and worsens stridor.

  4. Which lab value is most indicative of rhabdomyolysis requiring aggressive IV fluid resuscitation?

    Answer: Elevated creatine kinase (CK)

    Markedly elevated CK indicates extensive muscle breakdown characteristic of rhabdomyolysis, and IV fluids protect the kidneys from myoglobin-induced injury.

  5. A patient in anaphylaxis has received epinephrine 1:1,000 IM but symptoms persist. What is the next priority action?

    Answer: Repeat epinephrine 1:1,000 IM in 5–15 minutes

    A second dose of epinephrine IM can be given 5–15 minutes after the first if the patient does not improve, as epinephrine is the first-line treatment for anaphylaxis.

  6. Which assessment finding in a burn patient indicates the need for immediate endotracheal intubation?

    Answer: Singed nasal hairs with hoarse voice and stridor

    Singed nasal hairs, hoarseness, and stridor signal impending upper airway obstruction from inhalation injury requiring immediate intubation before edema worsens.

  7. When calculating the Parkland formula for burn resuscitation, what fluid is used in the first 24 hours?

    Answer: Lactated Ringer's solution

    The Parkland formula calls for 4 mL/kg/% TBSA burned of Lactated Ringer's solution over 24 hours.