对30名无症状吸烟者及30名对照者进行肺功能配对调查。结果表明,VC,FVC,FEV_1%,V_(25)、吸烟组与对照组无显著性差异,而MMEF,V_(75),V_(50),V_(50)/V_(25)吸烟组明显低于对照组。进一步分析肺功能指标异常率,吸烟组MMEF,V_(75),V_(50)的异常率分别为33.33%,63.33%,26.67%,而对照组分别为3.33%,30.00%,3.33%。本文证实,对常规通气功能尚属正常的无症状吸烟者,大、小气道已受到一定程度的损害。 Thirty asymptomatic smokers and 30 controls were investigated for lung function. The results showed that there was no significant difference between VC and FVC, FEV_1% and V_ (25), smoking group and control group, but the MMEF, V_ (75), V_ (50) and V_ (50) / V_ (25) Lower than the control group. Further analysis of anomalous rates of pulmonary function indicators showed that the abnormal rates of MMEF, V 75 and V 50 in the smoking group were 33.33%, 63.33% and 26.67% respectively, while the control group were 3.33%, 30.00% and 3.33% respectively. This article confirms that the conventional ventilation is still normal asymptomatic smoker, large and small airways have been a certain degree of damage.