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对 IUD 引起异常子宫出血的原因,曾有许多解释,如过量的前列腺素作用,IUD 大小不合适,止血栓形成减少以及纤溶活动增强等。虽然都与 IUD引起的异常子宫出血有关,但无一是确定性的原因。另一方面,宫颈外口 IUD 尾丝消失和带器妊娠可能疑及 IUD 脱落,而下腹疼痛、月经过多等症状则提示 IUD 异位或子宫穿孔。在对各种 IUD 副作用的诊断程序中,阴道窥器
There are many explanations for the causes of abnormal uterine bleeding caused by IUD, such as excessive prostaglandin, inappropriate size of IUD, reduction of thrombosis and enhancement of fibrinolytic activity. Although all related to abnormal uterine bleeding caused by IUD, none of them is the cause of certainty. On the other hand, the disappearance of the IUD tail and the pregnancy of the cervix may be suspected of IUD shedding, while the symptoms of lower abdominal pain and menorrhagia may indicate IUD ectopic or uterine perforation. In the diagnosis of various side effects of IUD, vaginal speculum