采用肺量计以一口气用力呼气作时间肺活量测定,并可计算早期流速如最大呼气流速(FEF200—1200)、中期流速如最大呼气中期流速(MMEF或FEF25—75％)和末期流速如最大呼气末期流速(FEF75—85％)。后者比MMEF对小气道疾患的判定较为敏感。我们曾将描绘时间肺活量曲线分为10等份,计算出最大呼气平均流速容量各个参数,分别计算出85、∨75、∨65、∨55、∨50、45、35、∨25、15等9个数值,FEF The spirometry was performed with one-breath forced expiratory time spirometry and early flow rates such as maximum expiratory flow (FEF200-1200), mid-term flow such as maximum expiratory mid-flow (MMEF or FEF25-75%) and final flow Such as the maximum end-expiratory flow rate (FEF75-85%). The latter is more sensitive to the judgment of small airway disease than MMEF. We have described the time spirometry curve is divided into 10 equal parts, calculate the maximum expiratory flow rate of the capacity of the various parameters were calculated 85, ∨ 75, ∨ 65, ∨ 55, ∨ 50, 45, 35, ∨ 25, 15, etc. 9 values, FEF