Emergency cervical cerclage using a metreurynter in patients with bulging membranes.

Emergency cervical cerclage was performed in 26 women between 18 and 32 weeks of gestation who had fetal membranes bulging through a widely dilated cervix. A bulging bag was pushed into the uterine cavity by a new method, using a metreurynter. The average prolongation of pregnancy after the operation in the 26 women was 41 days (ranging from 2 to 115 days). All pregnancies resulted in the live birth of altogether 28 babies. The neonatal survival rates at gestational ages of less than or equal to 26 (including two sets of twins), 27-29, and greater than or equal to 30 weeks at the time of cervical cerclage were 80.0 (12/15), 85.7 (6/7), and 100% (6/6), respectively. Ten (83.3%) of the 12 infants who survived from patients receiving cerclage at a gestational age of less than or equal to 26 weeks are alive and well. The average duration of pregnancy after cerclage was 60 days when cervical dilation was less than or equal to 5 cm at operation, in contrast to 5.4 days in patients with cervical dilation of greater than or equal to 6 cm, suggesting that emergency cervical cerclage could be suitable in the presence of a cervical dilation of 5 cm or less.