资料与方法1　临床资料　拟在连续硬膜外麻醉下行剖宫产产妇 60例 ,年龄 2 0～ 35岁 ,ASA ～ 级 ,无心肺及神经系疾患。均在 L2～ 3间隙穿刺、置管 ,麻醉效果满意。手术时间在 2 h以内 ,术前常规留置导尿管 2 4～ 48h。2　方　法　 60例产妇顺利剖宫取婴后随机分两组 ,每组 30 Materials and Methods 1 clinical data intended to cesarean section under continuous epidural anesthesia 60 cases of males, aged 20 to 35 years old, ASA ~ grade, no heart and lung and nervous system disorders. All of them were punctured in L2 ~ 3 space, and the tube was placed and the anesthetic effect was satisfactory. The operation time was less than 2 h. Preoperative routine indwelling catheter 24 ~ 48h. 2 Methods 60 maternal successful caesarean delivery of infants were randomly divided into two groups, each 30