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气道阻力是表达压力和流速的关系,它能反映小气道的阻力变化.近年来,在研究空气污染对居民健康影响的工作中,是一项较为灵敏的指标。关于在正常人群中气道阻力正常值的测定,国内外已有不少研究。J.E.Cotes报导,用体积描记法(此法是在没有气道压缩的情况下测定阻力)测出气道阻力正常值为0.5～2.0cmH_2O/L/S;后藤武报导,用通气阻断法测出气道阻力正常值为2.9±0.5(SD)CmH_2O/L/S,吴绍青报导气道阻力正常值为1.27±0 24CmH_2O/L/S。为了用气道阻力指标来评价大气污染对人体健康的影响,我们1979年在正常人群
Airway resistance is the relationship between pressure and flow rate and reflects changes in resistance of small airways. In recent years, it has become a more sensitive indicator in studying the health effects of air pollution on residents. About the normal population in the determination of normal airway resistance, there have been many studies at home and abroad. JECotes reported that the normal airway resistance measured by plethysmography (this method is the determination of resistance in the absence of airway compression) was 0.5 ~ 2.0cmH_2O / L / S; reported after Goto Fujimoto, ventilation method The normal airway resistance was measured as 2.9 ± 0.5 (SD) CmH2O / L / S. Wu Shaoqing reported a normal airway resistance of 1.27 ± 0.24CmH2O / L / S. In order to use airway resistance index to evaluate the impact of air pollution on human health, we in 1979 in the normal population