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对放置17天～17年的170只不锈钢IUD 分带器妊娠(P)、子宫出血(H)和对照组(C)三组进行分析,采用了原子吸收光谱、X 光衍射等仪器。结果表明不锈钢IUD 表面沉积物Ca、Mg、Na、K 元素中Ca 是重要的元素,并以CaCO_3的三种不同结构的结晶存在。Ca含量是随沉积物的递增而增加的。各组Ca 含量与IUD 存放时间的关系分别用最小二乘法作出拟合曲线,计算结果表明:Ca 沉积量虽随IUD 存放时间的延长而增多,但其增长率是渐渐下降的;增长率以C 组为最快。本文初步讨论了Ca 对提高避孕效果的作用以及与子宫出血不是正相关系。因此建议带不锈钢IUD 者没有因症而需取环时,不需定期换环。
170 pregnant stainless steel IUDs (P), uterine bleeding (H) and control group (C) were placed in 17 days to 17 years and analyzed by atomic absorption spectroscopy and X-ray diffraction. The results show that Ca in Ca, Mg, Na, K elements of stainless steel IUD surface sediment is an important element and exists in three different structures of CaCO_3. The Ca content increases with the increase of sediments. The relationship between Ca content and IUD storage time in each group was fitted by the least square method. The calculated results showed that although Ca deposition increased with the storage time of IUD, its growth rate decreased gradually; the growth rate was C The fastest group. This article initially discussed the role of Ca in improving contraceptive effectiveness and is not positively correlated with uterine bleeding. Therefore, it is recommended to take the stainless steel IUD no symptoms and need to take the ring, do not need to change the ring regularly.