使用金属节育环节育,具有简便、经济、效果可靠等优点,为广大群众欢迎。因此,定期用X线检查环的情况很有必要。根据完整的164例临床和X线检查资料分析,作者认为: 1.因立位检查子宫易变位,故被检者宜采取仰卧膀胱截石位透视。该时,环高度同宫颈深度基本一致,同一人多次透视变化不大。 The use of metal birth control birth control, with simple, economical, reliable results, for the general public. Therefore, it is necessary to periodically examine the ring with the X-ray. According to a complete analysis of 164 cases of clinical and X-ray examination data, the author believes: 1. Due to the position of uterine variability check, so the subjects should take supine bladder lithotomy position perspective. At this time, the ring height is basically the same with the depth of the cervix, the same person many times perspective little change.