Shuhan Wu, Master

CONTACT

Lead Sponsor

Zhujiang Hospital

Age

14 - 65 years

Sex

ALL

Healthy Volunteers

No

•Clinically diagnosed Asthmatic patients aged from14 to 65 years；
•Had a had a normal chest radiographic result；
•Had a baseline spirometry with the forced expiratory volume in one second (FEV1) of not less than 60% predicted；
•Without acute upper respiratory tract infection for the past 2 weeks

•Smokers；
•Had a poor cooperation to the test or limited understandings;
•Had a past confirmed history of respiratory disease other than bronchial asthma (COPD, bronchiectasis, pulmonary thromboembolism, etc.) or other severe systemic disease（myocardial infarction, malignant tumor, etc.）;
•Pregnancy or breast-feeding women;
•Taken related drugs before measurements（Leukotriene receptor antagonists (LTRA) for 5 days，oral glucocorticosteroid or anti-histamine for 3 days，oral xanthenes or long-acting bronchodilators for 2 days，inhaled corticosteroid or long-acting bronchodilator for a day , short-acting bronchodilator for 4 hours ）