1. Diagnosis
(1) Symptoms and signs.
(2) Investigations.
CD Sputum test: indicator of increased eosinophils.
Q) Respiratory function tests: decreased PEF and FEY,.
a> Airway responsiveness: Positive results for BPT and BDT.
® Arterial blood gas analysis test.
~ Radiological examination: chest X-ray is usually normal but may show hyperinflation in
severe or acute patients.
® Measurement of specific allergen.
2. Differential Diagnosis
(1) Upper airway obstruction by a tumor or foreign body.
(2) Chronic obstructive pulmonary disease (COPD).
(3) Wheezing and dyspnea caused by left heart failure.
3. Treatment
(1) Patient education.
(2) Avoidance of allergens.
(3) Drug therapies.