Status Asthmaticus Management

Patient Assessment and Monitoring

The American College of Physicians recommends evaluating the severity of status asthmaticus based on objective parameters such as respiratory rate, heart rate, oxygen saturation, and measurement of peak expiratory flow (PEF) or FEV1 1
The assessment of hypoxemia should be done using pulse oximetry, considering it significant when saturation is below 90-92% 1
Signs of life-threatening conditions include silent lung, cyanosis, exhaustion, inability to complete sentences, PEF <33% of predicted value, bradycardia, hypotension, confusion, or altered level of consciousness 1

Studies suggest that in status asthmaticus, there is a higher presence of neutrophils in the airways, unlike mild asthma where eosinophils predominate 2
In patients who die from status asthmaticus, especially when death occurs within the first hours of the attack, the predominant inflammatory cell is the neutrophil 3

The administration of oxygen should maintain a saturation >90% (>95% in pregnant women and patients with heart disease) 1
Beta-2 agonists are the first line of treatment: salbutamol 2.5-5.0 mg up to three times every 20 minutes in the first hour by nebulizer, or 2-10 inhalations every 20-30 minutes in the first hour with inhaler and spacer 1
Ipratropium bromide should be added to beta-2 agonists in severe exacerbations: 0.25-0.5 mg every 20 minutes for three doses, then every 4-6 hours as needed 1
Systemic corticosteroids are essential: prednisolone 30-60 mg daily for 5-7 days in adults, or methylprednisolone intravenously 1-2 mg/kg 1

The European Respiratory Society recommends that discharge criteria include clinical stability, improvement in oxygen saturation and lung function (FEV1 or PEF), normal respiratory rate, and absence of thoracic wall retractions 1
It is essential to establish a written action plan for asthma before discharge to prevent future exacerbations 4