Objective To study prospectively the influence of PCIA(Intravenous Patient Controlled Analgesia)and IMP(Intermittent Intramuscular Injection of Pethidine)to stress response after cholecystectomy and to explore the importance of postoperative analgesia.

• 目的 前瞻性研究开腹胆囊切除术后静脉自控镇痛泵和度冷丁肌肉注射镇痛治疗对机体应激反应的影响 ,探讨术后镇痛的重要性。