[Evaluation of the Espinosa Flores' operation of isthmo-cervical insufficiency].

An analysis of the results obtained in 66 patients with Espinosa Flores' operation for isthmo-cervical insufficiency, operated upon at La Raza Hospital, IMSS, was carried out. The study period was from January 1st to December 31, 1988. Gestational age and pregnancy evaluation were studied. The operation was done at 15.8 weeks of gestation, in average; the cerclage procedure was used as a second choice in 12 patients (18.1%) by slipping the tape: in two patients it was repeated in three different moments, which represents 21% of failure. There were a total of 17 cases of premature rupture of membranes, which represents 21.7%. Pregnancy was solved by delivery in 33 patients (50%), and by cesarean section in 25 cases (37.8%). There were a total of 8 abortions, and the total amount of alive products being discharged from the hospital, was 48 (72.7%).