The sham operation group was only given neck skin discission to expose the left carotid.
假手术组仅切开颈部皮肤，暴露左侧颈总动脉。
2
The patients underwent routine surgery, and the mean operation time was recorded from skin discission to incision close except closed reduction.
按常规手术方式进行手术，平均手术时间从切开皮肤至关闭伤口计算，闭合复位的时间不纳入统计。
3
ConclusionsThe technique of suture needle puncture and discission of bile duct is a simple, effective and safe method for laparoscopic common duct exploration.