Abstract: Objective To provide references for the use of IUD more safely and effectively and better carry out monitoring work of medical device by analyzing the reports of Intrauterine Device(IUD) adverse events. Methods 856 cases of IUD adverse events in Yunnan province in 2011 were collected and analyzed. Results Case reports mainly came from medical facilities that used IUD. 67.6% cases were reported in the fourth quarter of 2011. The top three of IUD adverse event reports were TCu, MCu and Yuangong, which involved 292 cases(34.1%),161 cases (18.8%) and 156 cases(18.2%) respectively. The case reports of IDU position and shape change, accidental pregnancy, menstrual problems were the top three adverse events, which involved 269 cases(31.5% ), 240 cases(28.0% ) and 207 cases(24.2%) respectively, among them, IDU downward involved 242 cases(28.3%), and pregnancy with IUD involved 238 cases (27.8%).Conclusion We should enhance awareness, carry out monitoring work actively, and improve the quantity and quality of IUD adverse event reports. In order to prevent and reduce the IUD adverse events, the professional skills and proficiency level of the operators also need to be improved.

Key words: intrauterine device, adverse events, devices