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Difficulty: HardPediatric Respiratory Disorders

While playing unsupervised in a playroom, a 22-month-old toddler experiences a sudden onset of choking and spasmodic coughing. His caregiver reports that the intense coughing resolved after several minutes, but the child has since been breathing rapidly. He has been previously healthy with no recent fever or nasal congestion. Current vital signs include a temperature of 36.9°C (98.4°F), blood pressure of 96/58 mm Hg, pulse of 128/min, and a respiratory rate of 42/min. Pulse oximetry indicates 95% on room air. Physical examination demonstrates an alert child with mild subcostal retractions. Lung auscultation is notable for decreased air entry and a persistent, localized monophonic wheeze over the right hemithorax. A chest radiograph demonstrates hyperinflation of the right lung field with leftward mediastinal deviation that is accentuated on expiration. Which of the following is the most appropriate next step in management?

  1. Rigid bronchoscopyAnswer
  2. B
    Flexible bronchoscopy
  3. C
    Right-sided needle thoracostomy
  4. D
    Administration of nebulized albuterol and oral dexamethasone
  5. E
    Intravenous ceftriaxone therapy

Answer

Rigid bronchoscopy is the most appropriate next step in management for this patient with suspected foreign body aspiration.
The patient's sudden onset of choking and coughing, combined with focal monophonic wheezing, decreased breath sounds on the right, and unilateral hyperinflation on radiography, is highly suspicious for foreign body aspiration. The aspirated object often lodges in the right mainstem bronchus due to its wider angle and more vertical orientation compared to the left. A partial obstruction creates a 'ball-valve' effect: during inspiration, the airway dilates and allows air past the object, but during expiration, the airway constricts, trapping air distally. This causes the affected lung to become hyperinflated (radiolucent) and pushes the mediastinum toward the contralateral side. The standard of care for suspected foreign body aspiration in children is rigid bronchoscopy, as it allows for direct visualization of the airway, maintenance of ventilation, and safe extraction of the object using specialized grasping forceps.

Step-by-Step Solution

1
Analyze the patient's presentation and clinical history.
The toddler had a sudden onset of choking and coughing without prior signs of infection, which is the classic history for foreign body aspiration.
Identifying the sudden, unprovoked nature of the symptoms differentiates this from infectious causes like bronchiolitis or croup.
2
Interpret the physical examination and imaging findings.
Focal right-sided wheezing and diminished breath sounds correlate with right lung hyperinflation and leftward mediastinal shift on expiration.
These findings indicate a partial obstruction in the right mainstem bronchus acting as a one-way ball-valve, allowing air in during inspiration but trapping it during expiration.
3
Determine the definitive diagnostic and therapeutic intervention.
Rigid bronchoscopy must be performed to visualize and safely remove the aspirated object.
In pediatric patients, rigid bronchoscopy is the standard of care as it provides excellent visualization, secures the airway, and allows the use of instruments for extraction.

Key Concept

The clinical presentation of foreign body aspiration often includes sudden-onset coughing and choking followed by unilateral wheezing. Diagnosis and treatment in pediatric patients require rigid bronchoscopy.
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Topics

Pediatric Respiratory Disorders

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