Lede R L, Belizán J M, Carroli G
Centro Rosarino de Estudios Perinatales, Argentina.
Am J Obstet Gynecol. 1996 May;174(5):1399-402. doi: 10.1016/s0002-9378(96)70579-3.
Episiotomy, one of the most common surgical procedures, was introduced in clinical practice in the eighteenth century without having strong scientific evidence of its benefits. Its use was justified by the prevention of severe perineal tears, better future sexual function, and a reduction of urine and fecal incontinence. With regard to the first assumption, the evidence that is based on five randomized controlled trials shows a 9% reduction in severe perineal tears in the selective use of episiotomy, but this effect fluctuates between a 40% reduction and a 38% increase. In relation to long-term effects, women in whom management includes routine use of episiotomy have shown poorer future sexual function, similar pelvic floor muscle strength, and similar urinary incontinence in comparison with women in whom episiotomy is used in a selective manner. In summary, there is no reliable evidence that routine use of episiotomy has any beneficial effect; on the contrary, there is clear evidence that it may cause harm such as a greater need for surgical repair and a poorer future sexual capability. In view of the available evidence the routine use of episiotomy should be abandoned and episiotomy rates > 30% do not seem justified.
会阴切开术是最常见的外科手术之一,于18世纪引入临床实践,当时并无有力的科学证据证明其益处。其使用理由包括预防严重会阴撕裂、改善未来性功能以及减少尿失禁和粪失禁。关于第一个假设,基于五项随机对照试验的证据表明,选择性使用会阴切开术可使严重会阴撕裂减少9%,但这种效果在减少40%至增加38%之间波动。关于长期影响,与选择性使用会阴切开术的女性相比,常规使用会阴切开术的女性未来性功能较差,盆底肌肉力量相似,尿失禁情况也相似。总之,没有可靠证据表明常规使用会阴切开术有任何有益效果;相反,有明确证据表明它可能造成伤害,如更需要手术修复以及未来性功能较差。鉴于现有证据,应摒弃常规使用会阴切开术,会阴切开率>30%似乎并无道理。