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김정대 ( Jeong Dae Kim ),전지혜 ( Ji Hye Jeon ),이명선 ( Myong Seon Lee ),이도근 ( Do Geun Lee ),지홍련 ( Hong Lyun Jee ),박시홍 ( Si Hong Park ),최현경 ( Hyeun Gyong Choi ) 대한산부인과학회 1997 Obstetrics & Gynecology Science Vol.40 No.12
Objective: Our purpose was to review of clinical aspect of incompetent internal os of cervix. Study Design: A retrospective review of incidence and etiology of IIOC patients at one institution from 1991 to 1996, and analysis of fetal salvage after McDonald operation was performed. Results: The incidence of operation for IIOC was 0.27% of total delivery. The most frequentage group was from 25 to 29 age group and the average number of pregnancy before operation was 4 times. The significant contributory factor of previous history wasthe induced abortion. In all cases, cerclage method was McDonald operation. The average fetal salvage rate after operation was 84.8%. The causes of fetal loss were preterm labor in 4 cases(57%), abortion in 2 cases(29%) and premature rupture of membrane in 1 case(14%) in order. The delivery methods after operation were vaginal delivery(39 cases: 84.4%) and abdominal delivery(7 cases :15.2%). Conclusion: We conclude that all the patients had a history compatible with incompetent cervix requiring a cerclage.We further conclude that with strict indications McDonald operation offers a high rate of fetal salvage with a minimum of complications in patients with extremely poor obstetric histories because of cervical incompetence.