Hagadorn-Freathy A S, Yeomans E R, Hankins G D
Department of Obstetrics and Gynecology, Wilford Hall United States Air Force Medical Center, Lackland AFB, Texas.
Obstet Gynecol. 1991 Mar;77(3):356-60.
In February 1988, an ACOG Committee Opinion substantially revised the classification of forceps operations. The revision addressed two significant shortcomings of the old system: Outlet forceps had been defined too narrowly and midforceps too imprecisely. We now report the results of a prospective study of 357 forceps deliveries classified using each system. Allowing up to 45 degrees of rotation in an outlet forceps delivery did not increase morbidity measured by any criterion. Dividing the old midforceps group by precisely identifying station and rotation permitted greater stratification of the risks of short-term neonatal and maternal morbidity. We conclude that our results validate the 1988 classification scheme.
1988年2月，美国妇产科医师学会（ACOG）委员会意见对产钳手术的分类进行了大幅修订。此次修订解决了旧系统的两个重大缺陷：出口产钳的定义过于狭窄，中位产钳的定义则不够精确。我们现在报告一项前瞻性研究的结果，该研究对使用每种系统分类的357例产钳分娩进行了分析。在出口产钳分娩中允许最多45度的旋转，并未增加任何标准衡量的发病率。通过精确确定胎位和旋转角度，将旧的中位产钳组进行划分，能够对短期新生儿和产妇发病风险进行更细致的分层。我们得出结论，我们的结果验证了1988年的分类方案。
