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Zorluk: OrtaPediatric Infectious Diseases

A 22-year-old girl is evaluated in the emergency department at 11:00 PM for a worsening cough and noisy breathing. Two days ago, she developed a mild fever, nasal congestion, and clear rhinorrhea. This evening, her cough became harsh and sounds similar to a barking seal. Her temperature is 38.1∘C38.1^\circ\text{C} (100.6∘F100.6^\circ\text{F}), heart rate is 130/min130/\text{min}, respiratory rate is 40/min40/\text{min}, and oxygen saturation is 96%96\% on room air. The patient is sitting in her mother's lap and appears anxious. There is noticeable inspiratory stridor even when the child is resting quietly. Chest auscultation reveals transmitted upper airway sounds but no lower airway wheezing or crackles. Which of the following is the most appropriate next step in management?

  1. Nebulized epinephrine and oral dexamethasoneCevap
  2. B
    Nebulized albuterol and oral dexamethasone
  3. C
    Oral amoxicillin and home humidification
  4. D
    Intravenous ceftriaxone and direct laryngoscopy
  5. E
    Subcutaneous terbutaline and intravenous magnesium sulfate

Cevap

The most appropriate next step is to administer nebulized epinephrine and oral dexamethasone.
The correct answer includes nebulized epinephrine and oral dexamethasone. This patient's presentation of a barking cough and inspiratory stridor is classic for croup (laryngotracheobronchitis), most commonly caused by the parainfluenza virus. The severity of croup is determined by the presence of stridor. Stridor that occurs only when the child is agitated (mild croup) can be treated with corticosteroids alone (dexamethasone). However, stridor at rest indicates moderate-to-severe subglottic narrowing. These patients require immediate nebulized racemic epinephrine, which acts on alpha-adrenergic receptors to cause mucosal vasoconstriction and rapidly decrease airway edema. Oral dexamethasone is also given to provide a sustained anti-inflammatory effect and prevent rebound airway swelling once the epinephrine wears off.

Adım Adım Çözüm

1
Analyze the clinical presentation and physical exam findings.
The patient has a viral prodrome followed by a barking cough and inspiratory stridor, which is the classic presentation of laryngotracheobronchitis (croup).
Identifying the correct clinical syndrome dictates the treatment pathway and helps avoid inappropriate therapies.
2
Assess the severity of the illness based on respiratory signs.
The presence of inspiratory stridor while the patient is resting quietly indicates moderate-to-severe croup.
Mild croup (stridor only with agitation) can be treated with corticosteroids alone, but moderate-to-severe croup requires immediate airway intervention.
3
Select the appropriate evidence-based pharmacological intervention.
Nebulized epinephrine must be administered for rapid mucosal vasoconstriction, along with oral dexamethasone to decrease inflammation.
This combination rapidly relieves the potentially life-threatening subglottic airway obstruction while preventing rebound swelling.

Anahtar Kavram

Management of moderate-to-severe croup (laryngotracheobronchitis)
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Konular

Pediatric Infectious Diseases

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