Objective It is to explore the effects of patient-controlled epidural analgesia(PCA) on the patients complement C3,C4 and C-reactive protein (CRP) after lower abdominal surgery.

• 目的探讨下腹部手术后硬膜外自控镇痛(PCA)对血清补体C3、C4和C-反应蛋白(CRP)的影响。