A 3-year-old boy is brought with barking cough and noisy breathing of 2 days' duration. He has a history of running nose and some fever for the preceding 3-4 days. Examination reveals respiratory rate of 40 per min, subcostal retractions and stridor. The most important step in the management is:
Nebulized adrenaline
This clinical picture (barking cough, stridor at rest, subcostal retractions) is classic croup (laryngotracheobronchitis) with moderate-severe severity. The most important immediate step is nebulized (racemic) adrenaline, which rapidly reduces airway mucosal edema, along with systemic corticosteroids; salbutamol has no role since bronchospasm is not the pathology.