The correlation of the angle between left principal bronchus and trachea and the ratio of residual volume and total lung capacity among three groups were positively correlative and the other parameters of lung function were negatively correlative ( P < 0.01 ) .

3组患者左主支气管与气管角度与 残气量/ 肺 总量呈正相关，与其他肺功能参数呈负相关（P<0.01）。

The Geographical Distribution of Normal Reference Value of Lung Compliance and Total Lung Capacity

肺顺应性和 肺 总量正常参考值的地理分布

Objective : The paper aims at supplying a scientific basic for unifying the reference value standard of Total Lung Capacity of Chinese healthy presenile women .

目的：本文的研究为制定中国健康老年前期女性 肺 总量参考值的标准提供科学依据。

The lung function tests included maximal voluntary ventilation ( MVV % ) forced vital capacity ( FVC ) force expiratory volume ( FEV 1 ) and RV / TLC % ( residual volume RV ; total lung capacity TLC ) .

肺功能检测主要包括最大通气量（MVV）、一 秒率（ FEV1/FVC%）和 残气容积（RV/TLC%）。

Results Total lung capacity residual volume vital capacity diffusing capacity of the lung for carbon monoxide and PaO_2 were all decreased though the first second ratio breathing frequency and PCO_2 were increased .

结果： 肺 总量、残气量、肺活量、肺一氧化碳弥散量和PaO2显著的减少，而FEV1%/FVC、呼吸频率和PCO2却增加。

Geographical Distribution of Reference Value of Total Lung Capacity of Presenile Women Based on Principal Component Analysis

基于主成分的老年前期女性 肺 总量参考值的地理分布