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Difficulty: MediumPediatric Infectious Diseases

A 17-month-old boy is brought to the urgent care clinic by his parents in January due to a newly developed cough. The parents report that he had a runny nose and a mild fever for the past two days, but last night his cough became harsh and sounded like a barking seal. His voice has also become progressively hoarse. His medical history is unremarkable, and his immunizations are up to date. His temperature is 38.1°C (100.6°F), heart rate is 128/min, respiratory rate is 28/min, and oxygen saturation is 98% on room air. On physical examination, the child is well-appearing, alert, and comfortable while sitting in his mother's lap. When the physician begins the examination, the child starts crying, and a high-pitched inspiratory sound becomes clearly audible. There is no drooling, nasal flaring, or intercostal retractions. Auscultation of the lungs reveals clear breath sounds bilaterally without any expiratory wheezing. Which of the following is the most appropriate next step in the management of this patient?

  1. Administer a single dose of oral dexamethasoneAnswer
  2. B
    Administer nebulized albuterol
  3. C
    Prescribe a short course of oral amoxicillin
  4. D
    Admit to the hospital and administer intravenous ceftriaxone
  5. E
    Administer the live-attenuated influenza vaccine and provide supportive care instructions

Answer

Administer a single dose of oral dexamethasone
The clinical presentation of a barking cough, hoarseness, and inspiratory stridor in a toddler is highly characteristic of croup (laryngotracheobronchitis), most commonly caused by the parainfluenza virus. The severity of croup is determined by the presence of stridor at rest and chest wall retractions. This patient has stridor only when agitated (crying) and is comfortable at rest without retractions, classifying his illness as mild croup. The standard of care for croup of any severity (mild, moderate, or severe) is the administration of a single dose of corticosteroids, typically oral dexamethasone. Corticosteroids reduce subglottic edema, provide significant symptomatic relief, and definitively decrease the rate of return visits to the emergency department.

Step-by-Step Solution

1
Identify the clinical syndrome based on the patient's symptoms and physical examination.
The combination of a barking cough, hoarseness, and high-pitched inspiratory sound (stridor) strongly indicates laryngotracheobronchitis, commonly known as croup.
Recognizing the classic clinical triad of croup differentiates it from lower respiratory tract infections (like bronchiolitis) and other upper airway emergencies (like epiglottitis).
2
Assess the severity of the illness using clinical markers.
The patient has stridor ONLY when agitated (crying) and is comfortable at rest without retractions. This classifies the presentation as mild croup.
Severity dictates management. Mild croup requires different interventions than moderate or severe croup (which would involve resting stridor and respiratory distress).
3
Determine the most appropriate evidence-based pharmacological intervention for the established severity.
A single dose of corticosteroids (such as oral dexamethasone) is indicated for croup of all severity levels, including mild cases.
Corticosteroids are the standard of care to decrease subglottic edema, improve symptoms, and reduce the likelihood of hospitalization.

Key Concept

Diagnosis and management of pediatric croup (laryngotracheobronchitis)
Estimated Time:1m 15s
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Topics

Pediatric Infectious Diseases

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