Olsen S, Tobiassen T
Acta Obstet Gynecol Scand. 1982;61(5):473-5. doi: 10.3109/00016348209156593.
During the period from 1973 to 1980 transabdominal isthmic cerclage was performed on 32 patients. Twenty-nine patients experienced 35 pregnancies. In 23 cases (79%) the diagnosis was based on one or several second-trimester abortions. In the remaining 6 cases the diagnosis was based on clinical findings of an abnormal cervix. Both groups had fetal loss in first and third trimester. The operation was performed before pregnancy or during pregnancy up to the 14th week. The fetal salvage rate rose from 12% to 91.4%, and the prematurity rate was 6.7% after operation. Only one pregnancy was terminated prematurely, due to forcible labor.
1973年至1980年期间，对32例患者实施了经腹峡部环扎术。29例患者经历了35次妊娠。23例（79%）的诊断依据是一次或多次孕中期流产。其余6例的诊断依据是宫颈异常的临床表现。两组均在孕早期和孕晚期出现胎儿丢失情况。手术在妊娠前或妊娠至第14周期间进行。胎儿挽救率从12%升至91.4%，术后早产率为6.7%。仅1例妊娠因强制分娩而提前终止。
