Myers-Helfgott M G, Helfgott A W
Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Texas Health Science Center, Lyndon Baines Johnson General Hospital, Houston, USA.
Obstet Gynecol Clin North Am. 1999 Jun;26(2):305-25. doi: 10.1016/s0889-8545(05)70077-2.
Episiotomy continues to be a frequently used procedure in obstetrics despite little scientific support for its routine use. Although episiotomy does decrease the occurrence of anterior lacerations, it fails to accomplish the majority of goals stated as reasons for its use. Episiotomy does not decrease damage to the perineum but rather increases it. The midline episiotomy increases the risk for third-degree and fourth-degree lacerations. Episiotomy fails to prevent the development of pelvic relaxation and its attendant complications. Rather than decreasing maternal morbidity, episiotomy increases blood loss and is related to greater initial postpartum pain and dyspareunia. It has been associated with a more difficult and lengthy repair as measured by the need for suture material and operating room time. The claims of a protective effect on the fetus in shortening the second stage of labor, improving Apgar scores, and preventing perinatal asphyxia have not been borne out. The value of episiotomy use on a routine basis bears scientific examination in prospective, randomized, controlled trials. These types of trials are certainly achievable, ethically correct, and much needed. Until these trials are completed and published, obstetricians should not routinely perform the procedure but rather determine the need for episiotomy on a case-by-case basis.
尽管缺乏常规使用的科学依据,但会阴切开术在产科中仍然是一种常用的手术。虽然会阴切开术确实能减少会阴前部撕裂的发生率,但它未能实现大多数作为其使用理由所提及的目标。会阴切开术并不能减少对会阴的损伤,反而会增加损伤。正中会阴切开术会增加三度和四度撕裂的风险。会阴切开术无法预防盆腔松弛及其相关并发症的发生。会阴切开术非但没有降低产妇发病率,反而增加了出血量,并且与产后初期更剧烈的疼痛和性交困难有关。根据缝合材料的需求和手术室时间衡量,它还与更困难、更耗时的修复相关。关于会阴切开术在缩短第二产程、提高阿氏评分和预防围产期窒息方面对胎儿具有保护作用的说法尚未得到证实。常规使用会阴切开术的价值需要在前瞻性、随机、对照试验中进行科学检验。这类试验肯定是可以实现的,在伦理上是正确的,而且非常必要。在这些试验完成并发表之前,产科医生不应常规进行该手术,而应根据具体情况确定是否需要进行会阴切开术。