Methods: Thirty patients under laparoscopic cholecystectomy were randomly divided into general anesthesia group and epidural anesthesia group and rsO 2, SpO 2 and PaCO 2 were measured.

• 方法：30例择期行LC病人随机分为硬膜外麻醉组和全身麻醉组。 对每例病人进行脑血氧饱和度（rsO2）、脉搏血氧饱和度（SpO2）及动脉血二氧化碳分压（PaCO2）等指标的测定。