Croup causes inflammation and edema below the vocal cords, especially in the subglottic airway. Because young children have a narrower airway diameter, even mild swelling can significantly increase airway resistance. The hallmark sounds come from the location of obstruction: Finding Meaning Barky cough Turbulent airflow through inflamed larynx/trachea Inspiratory stridor Upper-airway narrowing Hoarseness Laryngeal involvement Retractions Increased work of breathing Agitation or fatigue Possible worsening hypoxia or impending failure Symptoms often worsen at night and may follow mild viral prodrome symptoms such as rhinorrhea, low-grade fever, and cough. For Canadian NP practice / CNPLE-aligned preparation (Canada), items rarely announce the topic in the first sentence. Anchor to objective data, trajectory, and the safest next step for the role named in the stem before distractors compete. On the exam, writers often pair stable-sounding options with unstable data—notice the mismatch before you commit. If the stem names a license or role, reread that line; scope errors are classic trap answers even when the clinical topic is familiar. Run a 60-second scan: breathing work and oxygenation, perfusion and end organs, neuro baseline, likely...