Methods:The IOS indices of 50 normal cases and 110 cases of COPD were measured and compared with the traditional lung function indices including FEV 1/FVC%,and FEV 1/Pred%.

• 方法 :用IOS测定 5 0名健康人、110例COPD患者的呼吸阻抗及参数结构图 ,与传统肺量计法肺功能检测中FEV1/FVC %25、FEV1/Pred %25等指标比较。