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Difficulty: EasyPediatric Respiratory Disorders

During a mid-December clinic visit, a physician evaluates a 5-month-old infant due to three days of nasal congestion and a worsening cough. The parents report the infant has been breathing more rapidly since this morning but continues to breastfeed well and produce normal wet diapers. The patient was born at 39 weeks gestation and has no significant past medical history. Vital signs show a temperature of 37.6°C (99.7°F), heart rate of 138/min, respiratory rate of 52/min, and oxygen saturation of 97% on room air. Examination shows copious clear nasal discharge, mild subcostal retractions, and diffuse bilateral wheezing with scattered coarse crackles. Which of the following is the most appropriate next step in management?

  1. Reassurance and nasal suctioningAnswer
  2. B
    Administration of nebulized albuterol
  3. C
    Prescription for oral dexamethasone
  4. D
    Prescription for oral amoxicillin
  5. E
    Chest radiography

Answer

Reassurance and nasal suctioning is the appropriate management for mild bronchiolitis.
The correct answer provides the standard of care for a classic presentation of mild acute viral bronchiolitis. This infant exhibits typical signs (winter onset, rhinorrhea followed by tachypnea, wheezing, and crackles) but maintains good oxygen saturation and is feeding well. For mild bronchiolitis, supportive care including nasal suctioning (to relieve upper airway obstruction common in obligate nose-breathers) and adequate hydration is the only recommended treatment. Neither imaging nor pharmacological intervention is indicated.

Step-by-Step Solution

1
Identify the clinical syndrome based on patient age, season, and physical exam findings.
A 5-month-old infant presenting in winter with a viral upper respiratory prodrome followed by lower respiratory signs (wheezing, crackles) is classic for acute viral bronchiolitis, most commonly caused by Respiratory Syncytial Virus (RSV).
Recognizing the classic presentation of bronchiolitis avoids unnecessary diagnostic workup.
2
Assess the severity of the patient's respiratory distress.
The infant is well-appearing, maintaining excellent oxygenation (97% on room air), and feeding adequately, which indicates mild disease despite the tachypnea and mild retractions.
Severity determines whether the patient needs outpatient supportive care or inpatient escalation (such as supplemental oxygen or fluid administration).
3
Select the appropriate evidence-based intervention for mild bronchiolitis.
Supportive care with nasal suctioning to maintain airway patency and ensuring adequate oral hydration is the only indicated intervention.
Pharmacological interventions like bronchodilators and corticosteroids have proven ineffective for viral bronchiolitis.

Key Concept

Diagnosis and management of mild acute viral bronchiolitis
Estimated Time:45s
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Topics

Pediatric Respiratory Disorders

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