What is the concise short‑form management of status asthmaticus?

Management of Status Asthmaticus

Immediately administer high-dose nebulized albuterol (5 mg) or terbutaline (10 mg) via oxygen-driven nebulizer every 20 minutes for three doses, systemic corticosteroids (prednisolone 30-60 mg orally or IV hydrocortisone 200 mg), and supplemental oxygen to maintain SpO₂ >90% (>95% in pregnancy or cardiac disease). 1, 2

Immediate Assessment (First 5 Minutes)

• Measure peak expiratory flow (PEF) or FEV₁ before treatment—failure to obtain objective measurement is the most common preventable cause of asthma death 1, 2
• Severe exacerbation features: inability to speak full sentences in one breath, respiratory rate >25/min, heart rate >110/min, PEF <50% predicted 1, 2
• Life-threatening features requiring ICU consideration: PEF <33% predicted, silent chest, cyanosis, altered mental status, bradycardia or hypotension, normal/elevated PaCO₂ ≥42 mmHg in a breathless patient 1, 2

First-Line Treatment (First Hour)

• Bronchodilators: Albuterol 5 mg (or terbutaline 10 mg) nebulized every 20 minutes for three doses 1, 2
• Systemic corticosteroids: Prednisolone 30-60 mg orally OR IV hydrocortisone 200 mg immediately—do not delay while "trying bronchodilators first" 1, 2
• Oxygen: High-flow oxygen via face mask to maintain SpO₂ >90% 1, 2
• Add ipratropium bromide 0.5 mg to nebulizer for all moderate-to-severe exacerbations—reduces hospitalizations, especially in severe airflow obstruction 1, 2

Reassessment After 15-30 Minutes

• Good response (PEF >75% predicted): Continue nebulized β-agonist every 4-6 hours, maintain oral corticosteroids 1, 2
• Incomplete response (PEF 50-75% predicted): Continue intensive bronchodilator therapy every 4 hours, maintain systemic corticosteroids, consider hospital admission 1, 2
• Poor response (PEF <50% predicted): Increase nebulizer frequency to every 15-30 minutes, arrange immediate hospital admission 1, 2

Escalation for Refractory Cases

• IV magnesium sulfate 2 g over 20 minutes for severe exacerbations not responding after 1 hour of intensive treatment or life-threatening features 1, 2
• IV aminophylline 250 mg over 20 minutes for life-threatening features—never give bolus aminophylline to patients already on oral theophylline 1, 2
• Consider continuous albuterol nebulization for markedly severe cases 2

Hospital Admission Criteria

• Any life-threatening feature present 1, 2
• Severe attack features persisting after initial treatment 1, 2
• PEF <50% predicted after 1-2 hours of intensive treatment 1, 2
• Lower threshold for admission: afternoon/evening presentation, recent nocturnal symptoms, previous severe attacks requiring intubation, poor social circumstances 1, 2

ICU Transfer Criteria

• Deteriorating PEF despite therapy 1, 2
• Worsening or persistent hypoxia (PaO₂ <8 kPa) or hypercapnia (PaCO₂ >6 kPa) 1, 2
• Exhaustion, feeble respirations, confusion, drowsiness, or altered consciousness 1, 2
• Impending respiratory arrest 1, 2

Ongoing Monitoring

• Measure PEF 15-30 minutes after starting treatment and before/after each bronchodilator dose 1, 2
• Continuous pulse oximetry maintaining SaO₂ >92% 1, 2
• Continue high-dose steroids: prednisolone 30-60 mg daily or IV hydrocortisone 200 mg every 6 hours 1
• Obtain chest X-ray to exclude pneumothorax, consolidation, or pulmonary edema in non-responders 1, 2

Critical Pitfalls to Avoid

• Never administer sedatives—absolutely contraindicated and potentially fatal 1, 2
• Do not delay corticosteroids while "trying bronchodilators first"—both must be given immediately 2
• Do not give bolus aminophylline to patients on oral theophylline 1, 2
• Do not rely on subjective assessment—always measure PEF/FEV₁ objectively 1, 2
• Do not underestimate severity—patients, families, and clinicians frequently fail to recognize dangerous exacerbations 1, 2

Discharge Criteria

• PEF ≥70-75% of predicted or personal best 1, 2
• Minimal or absent symptoms 1, 2
• Stable for 30-60 minutes after last bronchodilator dose 1, 2
• Patient on discharge medications for 24 hours with verified inhaler technique 1, 2

Discharge Planning

• Continue oral corticosteroids for 5-10 days (no taper needed for courses <10 days) 1, 2
• Initiate or increase inhaled corticosteroids 1, 2
• Provide written self-management plan with PEF zones 1, 2
• Supply peak flow meter 1, 2
• Arrange primary care follow-up within 1 week and respiratory specialist follow-up within 4 weeks 1, 2