Objective: To explore the clinical effect of different administration juncture of pethidine and droperidol mixture during epidural anaesthesia of laparoscopic surgery.
目的：探讨杜氟合剂给药时机对腹腔镜手术硬膜外麻醉效果的影响。
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Aim: To study the clinical effects and aversive side effects of different dosage of droperidol on the post operative patient control epidural analgesia (PCEA) with tramadol.