IA MED Certified Flight Registered Nurse (CFRN) Practice Test

Rapid relief of airway edema is essential when a child with croup shows signs of airway swelling. Nebulized epinephrine delivers a rise in mucosal vasoconstriction, which sharply reduces subglottic edema and opens the airway within minutes. This quick onset is why it’s the best first-line intervention for swelling that threatens breathing. The effect is temporary, so it’s paired with corticosteroids (like dexamethasone) to sustain improvement and close observation to monitor for rebound symptoms as the epinephrine wears off.

Nebulized albuterol targets bronchodilation, which helps more with wheeze from asthma or bronchospasm—not the edema-driven obstruction seen in croup. Intravenous dexamethasone addresses inflammation, but its onset is slower, so it won’t provide the immediate relief needed in this acute swelling scenario. Nebulized albuterol-ipratropium offers similar bronchodilatory help but isn’t a primary choice for croup edema either.