应用体积描记仪对５０ 例慢性阻塞性肺疾病（ Ｃ Ｏ Ｐ Ｄ） 患者进行了第一秒用力呼吸容积（ Ｆ Ｅ Ｖ１） 、气道阻力（ Ｒ Ａ Ｗ）和比气道传导率（ Ｓ Ｇ Ａ Ｗ） 等测定，并根据其严重程度分为轻、中、重度三组。统计分析表明整体 Ｆ Ｅ Ｖ１ 和 Ｓ Ｇ Ａ Ｗ 呈正的直线相关 ， Ｒ Ａ Ｗ 在轻与重度及中与重度组间存在显著差异，而轻度与中度间无显著差异， Ｓ Ｇ Ａ Ｗ 在轻、中、重三组间均存在显著差异，说明在进行 Ｃ Ｏ Ｐ Ｄ严重程度分级中， Ｓ Ｇ Ａ Ｗ 与 Ｆ Ｅ Ｖ１ 同样均是敏感的指标。 Fifty patients with chronic obstructive pulmonary disease (COPD) underwent the first forced respiration volume (F E V1), airway resistance (R A W) and specific airway conductance (S G A W) and other determination, and according to their severity is divided into mild, moderate and severe three groups. Statistical analysis showed that there was a positive linear correlation between F E V1 and S G A W, R A W was significantly different between mild and severe and between moderate and severe groups, while there was no significant difference between mild and moderate S G A W There were significant differences among the three groups, indicating that S G A W and F E V1 are sensitive indicators in the classification of severity of C O P D.