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RV/TLC(残气量/肺总量),CC/TLC(闭合容量/肺总量),一向被认为是判断小气道功能的灵敏指标,但在COPD病人并无判定意义,为进一步证实这一结论,我们选60岁以上健康老年人51名和116名有典型COPD病史及体征的住院病人,使用Chest-25F电子肺功能机进行坐位肺功能检查,苹果Ⅱ型电子计算机处理数据。由于RV/TLC,CC/TLC与性别无关,从临床应用角度考虑,实测值/预测值的比值更有意义,因此本文采用比值单位％。
RV / TLC (total residual volume / total lung volume) and CC / TLC (closed volume / total lung volume) have always been considered as sensitive indicators for judging the function of small airways, but there is no significance in COPD patients. To further confirm this In conclusion, we selected 51 and 116 healthy inpatients over 60 years of age with typical COPD history and signs of inpatient pulmonary function tests using the Chest-25F electronic lung function machine, Apple Ⅱ type electronic computer processing data. Due to RV / TLC, CC / TLC has nothing to do with sex, from the clinical application point of view, the measured value / predicted value ratio makes more sense, this article uses the ratio unit.