Which of these factors contributes to infants’ and children's increased risk for upper airway obstruction as compared with adults?

Acute spasmodic laryngitis (midnight croup)is a sudden-onset, viral-induced laryngeal inflammation that typically occurs at night in children aged 1–3 years. It presents with a barking, seal-like cough, inspiratory stridor, and respiratory distress. This condition is usually mild and self-limiting, often managed at home with supportive care.

Rationale for correct answer:

3. Cool misthelps reduce mucosal swellingand soothe inflamed airways, easing breathing and decreasing cough intensity. Exposure to cool, humid air, such as from a cool-mist vaporizer or stepping outside into the night air, can relieve laryngeal spasm and inflammation. This is the first-line, noninvasive management for mild croup episodes at home.

Rationale for incorrect answers:

1. Giving oral fluidsduring acute respiratory distress increases the risk of aspiration. Oral intake should be avoided until the child’s breathing improves and the airway is stable.

2. Warm, dry aircan worsen airway inflammationand dry out secretions, making symptoms worse. The goal is cool, moist air, not warm air.

4. Although warm mistwas once recommended, cool mist is now preferred because it is safer and equally effective. Warm mist can sometimes increase swelling in the inflamed airway and poses a burn risk.

Take home points

• Cool, humidified air is the best nonpharmacologic intervention for mild croup (spasmodic laryngitis).
• Avoid warm air and warm fluids during acute distress.
• Monitor for signs of worsening airway obstruction such as stridor at rest, retractions, cyanosis, and drooling, these require emergency medical evaluation.
• Calm reassurance and keeping the child in an upright position can also reduce airway spasms and distress.

Croup (laryngotracheobronchitis)is a viral infection (commonly caused by the parainfluenza virus) that leads to inflammation and narrowing of the larynx and trachea, resulting in upper airway obstruction.
It typically affects children between 6 months and 3 years old. Symptoms are often worse at night and may follow an upper respiratory infection.

Rationale for correct answer:

4. The hallmark signs, barking cough and difficulty breathing, are classic indicators of croup. The cough results from laryngeal swelling, and inspiratory stridor occurs due to narrowing of the upper airway. Treatment typically includes humidified air, corticosteroids (e.g., dexamethasone), and, in moderate to severe cases, nebulized epinephrine to reduce airway edema.

Rationale for incorrect answers:

1. Cystic fibrosisis a genetic disorder causing thick mucus secretions affecting the lungs and pancreas. It presents with chronic cough, recurrent infections, and malabsorption, not a barking cough or acute airway obstruction.

2. Asthma causes wheezing, shortness of breath, and chest tightness due to lower airway bronchoconstriction, not a barking cough or stridor.

3. Epiglottitispresents with drooling, dysphagia, high fever, tripod positioning, and absence of cough not a barking cough. It’s a medical emergency due to risk of complete airway obstruction.

Take home points

• Barking cough and stridor are hallmark signs of croup which is viral and usually mild to moderate.
• Drooling, no cough, and high fever are symptoms of epiglottitis a bacterial emergency.
• Wheezing and chest tightness are typical of asthma.
• Chronic productive cough and malabsorption are symptoms of cystic fibrosis.