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Difficulty: HardPediatric Respiratory Disorders

In early February, the parents of an 18-month-old girl bring her to the emergency department because she has been breathing rapidly and feeding poorly for the past 24 hours. The parents note that her symptoms began four days ago with a runny nose, mild nasal congestion, and a "tight" cough. She has a past medical history of atopic dermatitis managed with emollients. Her immunizations are up to date. Her temperature is 37.9°C (100.2°F), pulse is 158/min, respirations are 58/min, and oxygen saturation is 89% on room air. Physical examination reveals an irritable but consolable toddler with prominent nasal flaring and subcostal retractions. Lung auscultation demonstrates a prolonged expiratory phase, diffuse polyphonic wheezing, and bilateral coarse crackles. A chest radiograph displays bilateral hyperinflation, flattened hemidiaphragms, and a focal, wedge-shaped area of increased opacity in the right middle lobe. Which of the following is the most appropriate next step in management?

  1. A
    Nebulized albuterol and oral dexamethasone
  2. B
    Intravenous ceftriaxone
  3. Supplemental oxygen and nasal suctioningAnswer
  4. D
    Oral azithromycin
  5. E
    Inhaled fluticasone

Answer

Supplemental oxygen and nasal suctioning
This patient's clinical presentation—an infant in the winter months with a viral prodrome followed by respiratory distress, diffuse polyphonic wheezing, and crackles—is highly characteristic of acute bronchiolitis, most commonly caused by Respiratory Syncytial Virus (RSV). The primary indications for intervention are hypoxia (oxygen saturation <90%) and severe increased work of breathing (retractions, nasal flaring). The standard of care for bronchiolitis is purely supportive, prioritizing supplemental oxygen to correct hypoxia and nasal suctioning to clear thick upper airway secretions. The focal, wedge-shaped opacity seen on the chest radiograph is a classic presentation of atelectasis due to mucus plugging, which is extremely common in severe bronchiolitis and does not independently indicate a superimposed bacterial infection.

Step-by-Step Solution

1
Analyze the patient's clinical presentation and demographics.
The patient is an 18-month-old with a viral prodrome followed by acute respiratory distress, wheezing, and crackles during the winter season.
Identifying the classic age group and symptom progression is essential for distinguishing bronchiolitis from asthma or typical bacterial pneumonia.
2
Evaluate the objective findings, including vital signs and chest radiograph.
The patient has hypoxia (SpO2 89%), severe tachypnea, and increased work of breathing. The chest radiograph shows hyperinflation and atelectasis.
Recognizing that focal opacities in this context represent mucus plugging (atelectasis) rather than lobar consolidation prevents inappropriate antibiotic administration.
3
Determine the most appropriate management based on the diagnosis and severity.
Given the diagnosis of severe bronchiolitis with hypoxia, supportive care with supplemental oxygen and airway clearance is the indicated treatment.
Evidence-based guidelines for bronchiolitis strongly recommend against bronchodilators, corticosteroids, and antibiotics, focusing entirely on supportive care.

Key Concept

The management of acute bronchiolitis relies on supportive care, specifically supplemental oxygen for hypoxia and nasal suctioning, while avoiding bronchodilators, corticosteroids, and unnecessary antibiotics even when atelectasis is present on imaging.
Estimated Time:1m 30s
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Topics

Pediatric Respiratory Disorders

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