近年来,天津市在计划生育工作中,流行一种给育龄妇女置一种带尾丝的T型宫内节育环。此环呈T型,带有尼龙尾丝。手术时,将尾丝少许留在阴道内,待需要取出时,只要牵拉尾丝,T型环即可被拉出。但置此环的妇女常因种种原因,如宫颈口过松、子宫周期性收缩等原因,致使阴道内尾丝缩入子宫腔内。当需要取出时发生了困难。目前,市售的取环器皆为单钩,纯为四周封闭型节育环设计。T型环四 In recent years, in the family planning work in Tianjin, it has become popular to give women of childbearing age a T-type intrauterine birth control ring with a silk tail. This ring is T-shaped with nylon tail wire. During surgery, the tail wire is left in the vagina a little. When it is needed to remove, the T-ring can be pulled out by pulling the tail wire. However, women with this ring are often caused by various reasons, such as loose cervix, periodic contractions of the uterus, and other causes, causing the vaginal tail to retract into the uterine cavity. Difficulty arises when it needs to be removed. At present, the commercially available ring remover is a single hook and is designed for a closed enclosed ring. T-ring four