Childhood Asthma Emergencies in the Field

By Jointra Editorial Team, Certified EMT

The Scale of Pediatric Asthma

Asthma affects approximately 6 million children in the United States. It is the leading cause of school absenteeism and a significant driver of pediatric emergency department visits. Most asthma deaths are preventable with appropriate and timely treatment.

Pathophysiology

During an asthma exacerbation, three processes occur simultaneously:

1. Bronchoconstriction — smooth muscle surrounding the airways contracts, narrowing the lumen 2. Mucosal edema — the airway lining swells 3. Mucus plugging — thick secretions obstruct smaller airways

The result is increased resistance to airflow, air trapping, hyperinflation, and increased work of breathing. If untreated, the child fatigues, ventilation fails, and respiratory arrest follows.

Assessing Severity

Mild:

• Child can speak in full sentences
• Mild wheeze on auscultation
• SpO2 >95%
• No retractions
• Responds to initial bronchodilator

Moderate:

• Speaks in phrases, not full sentences
• Diffuse wheeze
• SpO2 92–95%
• Subcostal or intercostal retractions
• Accessory muscle use

Severe:

• Single words or unable to speak
• Loud wheeze or (ominously) silent chest
• SpO2 <92%
• Marked retractions, nasal flaring, tripod positioning
• Diaphoresis, cyanosis

The silent chest is a pre-arrest finding. No wheeze = no air movement = critical emergency.

Treatment

Bronchodilator: Albuterol via nebulizer (2.5–5mg) or MDI with spacer. Can be given continuously in severe exacerbations. This is the cornerstone of treatment.

Ipratropium (Atrovent): Combined with albuterol in moderate-severe exacerbations for additive bronchodilation.

Oxygen: Titrate to maintain SpO2 >94%. High-flow if severe.

Epinephrine IM: For life-threatening exacerbation or patient failing standard treatment. 0.01mg/kg (max 0.5mg) IM.

Magnesium sulfate IV: Used in the ED for severe exacerbations refractory to bronchodilators. May be in some ALS protocols.

Corticosteroids: Dexamethasone or prednisolone. Reduce inflammation and prevent relapse. Should be given early if available.

CPAP: Can reduce work of breathing in select cases. Use with caution — air trapping risk.

Intubation: Last resort. Asthmatics are difficult to ventilate; intubation carries high risk of complications including pneumothorax. Do everything possible to avoid it.

Transport Considerations

Do not delay transport for treatment in severe exacerbations. Treat aggressively en route. Notify the receiving hospital early so a team is ready.

Keep the child in a position of comfort — usually sitting upright. A calm environment reduces oxygen demand.