Acute Bronchiolitis Management
A 7-month-old girl presents in January with 3 days of coryza and cough and now noisy breathing. She has taken about half her usual feeds. Temperature is 38.3 °C, respiratory rate 58 breaths/min with subcostal and intercostal retractions and nasal flaring, and oxygen saturation is 90% on room air, with widespread wheeze and fine inspiratory crackles. Chest radiograph shows hyperinflation with no focal consolidation. What is the most appropriate management?
- A.Admit directly to the paediatric intensive care unit
- B.Admit for supplemental oxygen and intravenous antibiotics
- C.Discharge on oral amoxicillin with review in 48 hours
- D.Admit for supplemental oxygen and hydration supportCorrect
Explanation
This is classic acute bronchiolitis, most often caused by respiratory syncytial virus, in which viral infection of the bronchiolar epithelium produces necrosis, oedema, and mucus plugging with resulting small airway obstruction, hyperinflation, wheeze, and crackles. Management is entirely supportive: supplemental oxygen to maintain saturation at or above 90 to 92%, nasal suction, and assisted hydration by nasogastric tube or intravenous fluids when feeding falls below about half to two thirds of normal, together with close observation for apnoea in the youngest infants. Admission criteria include hypoxaemia, significant respiratory distress, poor feeding or dehydration, apnoea, age under 2 to 3 months, prematurity, and underlying cardiopulmonary or immune disease, and this infant meets several of them. Antibiotics have no role because the illness is viral and secondary bacterial infection is uncommon; a radiograph showing hyperinflation without consolidation supports this, and radiographs are not routinely indicated at all. Discharging on amoxicillin ignores both the hypoxaemia and the viral aetiology. Intensive care admission is reserved for impending respiratory failure with exhaustion, recurrent apnoea, persistent hypoxaemia despite high-flow support, or rising carbon dioxide, none of which is present. Bronchodilators, systemic corticosteroids, and chest physiotherapy are not recommended routinely because they do not alter the course; high-flow nasal cannula therapy is used as an escalation for infants failing standard oxygen.
Why each option
- A.
- Intensive care is reserved for impending respiratory failure, recurrent apnoea, or hypoxaemia refractory to escalating support.
- B.
- Intravenous antibiotics are unnecessary in uncomplicated viral bronchiolitis without consolidation or evidence of bacterial infection.
- C.
- Discharge is unsafe with a saturation of 90%, marked retractions, and halved feeds, and amoxicillin treats nothing here.
- D.
- Correct. Bronchiolitis is managed supportively; this infant needs admission for oxygen and hydration because of hypoxaemia, distress, and reduced feeding.
Reference: AAP Clinical Practice Guideline: Diagnosis, Management and Prevention of Bronchiolitis, 2014 (reaffirmed); UpToDate 2025
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