Bronchiolitis in Child
Viruses infect the terminal bronchiolar epithelial cells causing edema, excessive mucus, and obstructed small airways. Signs and symptoms begin with rhinorrhea, cough, and fever and can progress to respiratory distress. Physical exam findings often include accessory muscle use, nasal flaring, chest retractions, wheezing, prolonged expiratory phase, and coarse or fine crackles.
Risk factors for severe disease include prematurity, age <12 weeks, and underlying chronic illness such as chronic pulmonary disease or congenital heart disease. Severity of typical illness peaks at 3-5 days of symptoms, with cough typically resolving by days 8-15. Complications include dehydration, apnea, respiratory failure, and secondary bacterial infections.
J21.9 – Acute bronchiolitis, unspecified
4120002 – Bronchiolitis
Differential Diagnosis & Pitfalls
Drug Reaction Data