Objective:To explore the effection of one interspace and two interspaces epidural block on the bloodgas analysis of laparoscopic surgery in lowerabdomen and pelvic cavity.

• 目的：探讨单点和两点连续硬膜外阻滞麻醉方法对下腹部、盆腔腹腔镜手术血气分析的影响。