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目的：探讨烟龄≥15 年，日吸烟量≥15 支的无症状男性吸烟者的肺功能改变情况。方法：选择男性无症状吸烟者190 人及非吸烟者180 人，进行肺功能测定，并比较两组人群的肺功能改变情况。结果：吸烟组与非吸烟组比较，肺活量（VC）、用力肺活量（FVC）、第1 秒用力呼气容积（FEV1）、Tiffeneau 1 秒率（FEV1/VC）结果改变不明显，而Gaensler 1 秒率（FEV1/FVC）、最大分钟通气量（MVV）、用力呼气50%肺活量的呼气流量（FEF50%）、用力呼气75%肺活量的呼气流量（FEF75%）、呼出25%～75%肺活量时的平均流量（FEF25%～75%）、肺一氧化碳弥散量（DLCO）结果均有显著降低，有统计学意义。结论：通过对无症状吸烟人群肺功能测定结果进行分析。发现有些吸烟者虽无临床症状，但已经出现了小气道及肺弥散功能的损伤，提醒吸烟者应早期戒烟，关爱自身健康，净化生存环境，提高生活质量。

英文摘要:

Objective: To explore changes of lung functions in asymptomatic smokers who smoke at least 15 cigarettes for 15 years or longer. Methods: 190 asymptomatic smokers and 180 asymptomatic non-smokers were enrolled and their lung functions were measured by standard method. The change of lung functions between these two groups was compared. Results: Compared with the non-smoking group, Vital Capacity（VC）, Forced Vital Capacity（FVC）, Article 1 second Forced Expiratory Volume（FEV1）, Tiffeneau 1 second rate（FEV1/VC）of the smokers group did not change significantly, and Gaensler 1 second rate（FEV1/VC）, Maximum Minute Ventilation （MVV）, Forced Expiratory 50% Spirometry Expiratory Flow （FEF50%）, Forced Expiratory 75% Spirometry Expiratory Flow（FEF750%）, Average Spirometry Sxpiratory Flow of Forced Expiratory 25%～75%, Carbon Monoxide dispersion quantity（DLCO） of the smokers group were lowered with statistical significance. Conclusion: Through the analysis of the testing results for lung function in asymptomatic smokers, we demonstrate that some smokers appeared a tiny airways and lung dispersion function damaging but did not have clinical symptoms. Smokers should quit smoking as early as possible not only to build up their own health and quality of life but also to improve people's enviroment.

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