已有动物试验和临床对比研究表明结直肠吻合术后预防性引流并不能减少术后并发症 (如吻合口漏 )的发生 ,甚至可能是有害的。但临床试验样本小 ,缺乏说服力 ,许多外科医生仍延续传统术后常规放置预防性引流的习惯。本文通过系统回顾文献资料 ,综合分析随机对比试验来解答预防性 There have been animal trials and clinical comparative studies have shown that prophylactic drainage after colorectal anastomosis does not reduce the incidence of postoperative complications (such as anastomotic leakage), and may even be harmful. However, small clinical trials, lack of persuasion, many surgeons still continue the traditional customary postoperative preventive drainage. This article systematically reviews the literature, a comprehensive analysis of randomized controlled trials to answer preventive