Clinical effect of fetoscopic laser occlusion of chorioangiopagous vessels for twin-twin transfusion syndrome: experience of an center from China

To study the clinical effect of fetoscopic laser occlusion of chorioangiopagous vessels (FLOC) in treating twin to twin transfusion syndrome. The clinical data of 44 consecutive cases of twin to twin transfusion syndrome (TTTS)who had FLOC in the Department of Obstetrics and Gynaecology of Peking University Third Hospital were reviewed and analyzed for perioperative complications, perinatal outcomes and fetal survival rate. (1) PATIENT CHARACTERISTICS: the mean maternal age was (29±4) years, the median gestational age at TTTS being primarily diagnosed was 20.4 weeks, the median gestational age at FLOC was 21.2 weeks. According to the Quintero staging system, there were 9 cases had stages progressed before the operation. (2) FLOC parameter and intraoperative complications: 44 cases all could tolerate the operation; there was 1 case of placenta vascular rupture in the operation, no fetal body injury by laser or placental abruption. 3 cases underwent cervical cerclage following FLOC. The average operation time o