Comparison of success and morbidity in cervical cerclage procedures

A review of 251 cervical cerclage procedures in 205 women over a 7.5-year period was conducted to compare the success rate and morbidity of the Shirodkar and McDonald techniques. Fetal survival rate was 19% before 139 elective McDonald operations and 20% before 63 elective Shirodkar procedures. Fetal survival was 78% after elective McDonald operations and 87% after elective Shirodkar procedures, a difference that is not statistically significant (P > .05). Fetal survival rate was 53% after 30 emergency McDonald and 68% after 19 emergency Shirodkar procedures, a difference not statistically significant. Major postoperative morbidity occurred in 2.0% of the elective cerclage procedures, and acute chorioamnionitis accounted for half the complications (1.2%). Mean blood loss was 30 ml with McDonald operations and 44 ml with Shirodkar procedures; the maximum blood loss of 150 ml occurred in 2 emergency operations. Cervical laceration at parturition occurred more often with Shirodkar (11%) or McDonald (14%) procedures than with the 55,688 other deliveries (2.18%) during the 7.5-year study period (P < .001). Cervical scarring and elective cesarean section significantly (P < .025) increased the cesarean section rate to 16% after McDonald procedures and 25% after Shirodkar procedures.