This study composed of two parts, that were the diagnosing part and the treatment part.
Age
14–65
Sex
ALL
Healthy volunteers
Not accepted
You may be eligible if
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
You may not be if
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 ）
Clareo Health | Assessment of Airway Responsiveness and Treatment Efficacy in Asthmatics
