结果：麻醉后肺活量，肺活量占预计值百分比、补呼气量、补吸气量、最大通气量及最大用力呼气流量容积曲线的呼气流量均有显著降低（P<0.05）。
The results showed significant differences in each of VC , % VC , ERV , IRV , MVV and expiratory flow indicated by MEFV curve ( P < 0.05 % ) after epidural block .
补呼气量