支气管哮喘(简称哮喘)严重者,肺泡通气不足,通气/血流比例失调,动脉血氧合不足,可引起动脉血氧饱和度降低。经治疗后,支气管痉挛缓解,气道恢复通畅,通气功能恢复正常,FEV 1.0大于预计值的80%。传统的看法认为治疗就算成功。近年来许多作者应用小气道(内径≤2mm)测验方法研究缓解期哮喘患者的小气道功能,发现小气道 Serious bronchial asthma (asthma), alveolar hypoventilation, ventilation / blood flow imbalance, inadequate arterial oxygenation, can cause arterial oxygen saturation decreased. After treatment, bronchial spasm relief, airway patency, ventilatory function returned to normal, FEV1.0 greater than the expected value of 80%. The traditional view that even if the treatment of success. In recent years, many authors use the small airway (diameter ≤ 2mm) test method to study the small airway function in patients with remission asthma and found that small airway