宫内节育器异位少见,上海报道发生率为0.096‰。我们最近遇到4例,报道如下。例1:因要求绝育而入院。入院后,经腹行输卵管结扎术。打开腹腔后,查子宫后位,并偏向左侧。寻找输卵管时,于右侧子宫角处触及一环状异物,与子宫无粘连,而粘连于大网膜上。遂将其提出切口外,乃知是金属环被大网膜包裹,即将环分离取下。此例患者上环时即有腹痛、头昏等症状,其后带环妊 Inertia rare ectopic, Shanghai reported incidence of 0.096 ‰. We recently encountered 4 cases, reported below. Example 1: admitted to hospital for sterilization. After admission, the line of tubal ligation. Open the abdominal cavity, check the uterus posterior position, and biased to the left. Looking for tubal, in the right corner of the uterus touched a ring of foreign body, no adhesions with the uterus, and adhesions in the omentum. Then put it outside the incision, it is known that the metal ring is wrapped by the omentum, about to ring separation removed. In this case, the patient had abdominal pain, dizziness and other symptoms, followed by cirrhosis