Asthma Diagnosis and Management
Diagnostic Evaluation
- The American Academy of Allergy, Asthma, and Immunology recommends performing spirometry to confirm diagnosis by demonstrating variable airflow obstruction, with FEV1/FVC ratio assessment and bronchodilator reversibility testing 2
- Assess peak expiratory flow (PEF) measurements to establish baseline and monitor variability in patients with asthma 1, 3
- Evaluate for common diagnostic challenges including cough variant asthma, vocal cord dysfunction, and comorbidities like GERD and obstructive sleep apnea in patients with asthma 2
- Document frequency of symptoms, nighttime awakenings, activity limitations, and rescue medication use to classify severity in patients with asthma 1, 4
Classification of Asthma
- Categorize asthma as intermittent or persistent (mild, moderate, or severe) based on symptom frequency, nighttime awakenings, and lung function, as recommended by the National Asthma Education and Prevention Program 4
- Assess both current impairment (symptoms, lung function, activity limitations) and future risk (exacerbations, medication side effects, lung function decline) in patients with asthma 2, 4
Treatment Approach
- The American College of Allergy, Asthma, and Immunology recommends assessing asthma severity to determine initial treatment level in newly diagnosed patients 1, 5
- Use validated questionnaires like Asthma Control Test (ACT) or Asthma Control Questionnaire (ACQ) to standardize assessment of asthma control 1, 4
- For persistent asthma, daily inhaled corticosteroids (ICS) are recommended as the foundation of therapy, with step-up options including addition of long-acting beta-agonist (LABA) or medium-dose ICS 1, 5
Monitoring and Follow-up
- Assess asthma control at regular intervals (every 2-6 weeks initially, then every 1-6 months) and monitor lung function with spirometry or peak flow measurements in patients with asthma 1, 2, 4
- Step up treatment if control is not achieved; step down if control is maintained for at least 3 months, as recommended by the National Asthma Education and Prevention Program 1, 4
Acute Exacerbation Management
- Assess severity using objective measures (PEF, oxygen saturation) and clinical signs, and administer high-dose inhaled beta-agonists and systemic corticosteroids as needed in patients with acute asthma exacerbations 3, 6
- Consider hospital admission for severe exacerbations, especially with poor response to initial treatment 3, 6