To evaluate the clinical significance of maximal midexpiratory time(MET) in testing small airway functions for smokers,the routine ventilatory functions,MET and F V curve configurations were studied in 116 passive and light,heavy active smokers.

• 为评价最大呼气中段时间（MET）对检查吸烟者小气道功能的临床意义，我们对116 例被动吸烟者和轻、重度主动吸烟者的常规肺通气功能、MET和F－V曲线形状进行了探讨。