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宫内放置不锈钢单环是一种安全、简便,效果较好、能长期避孕的方法,但在实践中还存在一定的失败率。为了提高节育环的避孕效果,找出可能导致放环失败的因素,研究和改进放环技术,我们研制了宫腔测量选环器,现介绍如下:基本原理:子宫腔颇似等腰三角形,其宫底相当于三角形底边,宫颈内口为三角形之顶角,宫腔深度与宫底宽度不同,则宫腔大小亦不相同。如按等腰三角形内切圆原理来计算环的直径,则可选择适当环号以适应宫腔大小。
Intrauterine placement of stainless steel single ring is a safe, simple, effective, long-term contraception method, but in practice there are still some failure rates. In order to improve the contraceptive effect of birth control ring, to find out the factors that may lead to the failure of the release ring, to study and improve the ring release technique, we have developed the measurement of the uterine cavity ring, are described as follows: The basic principle: the uterine cavity resembles isosceles triangle, The bottom of the palace is equivalent to the bottom of the triangle, the mouth of the cervix is the vertex of the triangle, the depth of the uterine wall and the bottom of the palace, the size of the uterine cavity is not the same. If the isosceles triangle according to the inscribed circle principle to calculate the diameter of the ring, you can choose the appropriate ring to accommodate the size of the uterine cavity.