宫内节育器是一种安全、简便、有效、深受群众欢迎的节育措施,在国内已广泛应用。为适应计划生育工作开展的需要,和配合做好临床随访工作,利用 X 线检查宫内节育器的存留,了解节育器在宫内的运动状态,有利于发现问题,及时处理。一、目前国内常用宫内节育器的品种及其形态结构(一)金属环:呈单圆形,是目前国内采用较多的一种宫内节育器,由不锈钢丝绕成螺旋形弹簧单环(图1-1)。(二)麻花环:由镍铬钛合金不锈钢丝作成,呈螺旋形盘绕后,再交叉回绕成麻花状圆环(图1-3)。(三)混合环:呈车轮状圆环,中间有尼龙支架,外圈绕较稀的螺旋形不锈钢丝(图1-4)。(四)节育花:由含33％硫酸钡的塑料制 IUD is a safe, simple, effective, popular birth control measures, has been widely used in the country. In order to meet the needs of family planning work, and cooperate with the clinical follow-up work, the use of X-ray examination IUD retention, to understand the IUD in the uterine movement is conducive to the discovery of problems and timely treatment. First, the current domestic variety of intrauterine devices and their morphological structure (A) metal ring: a single circular, is currently more domestic use of an IUD, wound from a stainless steel wire into a spiral spring single ring (Picture 1-1). (B) of the hemp ring: made of nickel-chromium-titanium alloy stainless steel wire, was spirally wound, and then cross-wound into a twist-shaped ring (Figure 1-3). (C) hybrid ring: was a wheel-shaped ring, the middle nylon bracket, the outer ring around the more dilute spiral stainless steel wire (Figure 1-4). (D) birth control: made of plastic containing 33% barium sulfate