- Diagnosis is mainly clinical based on history and examination
- Supportive evidence is provided by
- Spirometry - FEV₁ is reduced than normal and there is > 15% increase in FEV1 following administration of broncho dilator
Reversibility Test
2- Peak Flow Meter at Home
- Patients are advised to record peak flow reading after arising in the morning and before retiring in the evening
- PEF (Peak Expiratory Flow) if reduced more than 20% in the morning is considered diagnostic of bronchial asthma
Peak Flow Meter
Other useful test
- Allergic status - skin prick test
- IgE measurement
- Blood CBC - may show increase Eosinophil count,
- Radiological examination - normal or hyperinflation of lung fields
Chest X-Ray
