Nitroglycerin facilitates therapeutic cerclage placement.

Therapeutic cerclage placement may be complicated by prolapsing of the fetal membranes. A gravida presented with incompetent cervix and prolapse of fetal membranes. The membranes were not reduced by Trendelenburg position, decompressive amniocentesis, and spinal anesthesia. Intravenous nitroglycerin promptly reduced the prolapse and allowed cerclage placement. This is the first report of intravenous nitroglycerin tocolysis used to facilitate cerclage placement.