产时会阴切开术已成为世界上妇女最普遍的外科手术之一。近10年来会阴切开率(尤其是侧切率)明显升高,国内大部分医院均在75%左右[1]。该手术几乎成为自然分娩的一种常规操作。原因主要来自于复杂的社会、文化、经济及医疗等方面如:①孕妇体重超标,胎儿过重,不利于顺利经阴道分娩;②实施计划分娩,过多医疗干预;③胎心监护仪广泛使用,盲目采信仪器结果,过度诊断;④阴道助产技术相对萎缩,相关经验渐少;⑤医患关系不和谐,医护人员不愿或不敢继续观察,一旦发现所谓的高危因素便匆匆结束分娩等。大量临床研究发现会阴切开术有效性缺乏有 During labor, perineal incision has become one of the most common surgical procedures in the world for women. In the past 10 years, the rate of perineal incision (especially the rate of lateral incision) has risen markedly, and most of the hospitals in China are around 75% [1]. This procedure has almost become a routine operation of natural childbirth. The reasons mainly come from complex social, cultural, economic and medical aspects such as: ① pregnant women overweight, the fetus is too heavy, is not conducive to the successful vaginal delivery; ② plan delivery, excessive medical intervention; ③ fetal heart monitor widely used Blind acquisition of instruments results, over diagnosis; ④ vaginal midwifery technology relative decline, less relevant experience; ⑤ doctor-patient relationship is not harmonious, medical staff do not want to or continue to observe, once found the so-called risk factors will be hurriedly ended childbirth . A large number of clinical studies have found that the effectiveness of perineal incision lacks