我院于1984年放置此型节育器200例,经两年观察未见脱落及带器受孕.但由于此型节育器放置宫腔后,被下折的两横臂须各向上展开90°才能抵达子宫角(图1,2)。当两横臂向上伸展45°时,两端距宫底约为1.2cm,如该处子宫横径不足2.2cm,当横臂伸展时就易划伤子宫侧壁造成术后出血及疼痛,或因横 My courtyard in 1984 placed this type of IUD 200 cases, after two years of observation no shedding and pregnancy with the device, but because of this type of IUD placed in the uterine cavity, the folded down two arms must be up to 90 ° Arrival at the uterine horn (Figure 1, 2). When the two arms extend 45 ° upward, the two ends are about 1.2cm away from the end of the palace. If the transverse diameter of the uterus is less than 2.2cm, the side wall of the uterus will be easily scratched and cause postoperative bleeding and pain when the transverse arm is stretched or Due to horizontal