本文检测了哮喘患者呼出气体中一氧化氮(NO)的浓度,并将非吸烟和吸烟的健康人作对照,在单口呼出气中,两个对照组和哮喘患者都可测出气道NO高峰,哮喘患者的NO浓度高峰高于非吸烟者,而吸烟者的NO峰值低于非吸烟者(P<0.05)。结果表明:哮喘患者具有机体防御反应;因此,检测NO可鉴别肺部疾病的不同类型。 In this paper, we measured the concentration of nitric oxide (NO) in the exhaled breath of asthmatic patients and compared non-smoker with healthy smokers. In single breath exhaled air, the NO peak of airway was measured in both control and asthmatic patients , The peak of NO concentration was higher in asthmatic patients than in non-smokers, while the NO peak in smokers was lower than that in non-smokers (P <0.05). The results show that: Asthmatic patients have a body-defensive response; therefore, detection of NO can discriminate between different types of lung diseases.