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本文研究的目的是证实Cavity Rim宫颈帽与隔膜具有同等的避孕作用,而且前者比其他节育器引起阴道病变的危险性均小,并比较了两组的尿道感染率以及宫颈帽和隔膜的巴氏涂片。这次研究是由国家卫生协会发起的Bernstein是主要研究者。1981年FDA命名宫颈帽为“研究性节育器” (investigational device)。在Bernstein′s组进行宫颈帽-隔膜比较以前,已对两种类型的宫颈帽进行了初步耐受性研究,以确定宫颈帽能安全的放置多长时间。作者随机设计了40名妇女,或应用Cavity Rim或应用Vimule帽。Cavity Rim的空腔缘(Rim Cavity)有助于将宫颈帽把持在宫颈上,它有四种大小规格,从22mm至31mm,
The purpose of this study was to demonstrate that Cavity Rim cervical caps had the same contraceptive effect as the septum and that the former had a lower risk of developing vaginal lesions than the other devices. The prevalence of urinary tract infections, Smear. Bernstein, the study sponsored by the National Institutes of Health, is the lead investigator. In 1981 the FDA named the cervical cap “investigational device.” Before the Cervical Hatch-Membrane Comparison in Bernstein’s Group, two types of cervical caps were studied for preliminary tolerance to determine how long a cervical cap can be safely placed. The authors randomly designed 40 women, or applied Cavity Rim or Vimule caps. Cavity Rim Cavity edge (Rim Cavity) helps to hold the cervical cap on the cervix, it has four sizes, from 22mm to 31mm,