Symphysiotomy for the trapped aftercoming parts of the breech: a review of the literature and a plea for its use.

The most dreaded complication of vaginal breech delivery is entrapment of the aftercoming head. When this is due to disproportion, persistent attempts at vaginal extraction are likely to result in a dead or damaged baby. A largely unknown solution in this desperate predicament is to surgically enlarge the pelvis by means of a symphysiotomy. A review of the literature shows that symphysiotomy performed to free the trapped aftercoming head will save at least 80% of babies if the procedure is performed without delay. Every obstetrician should be prepared to perform a symphysiotomy if the aftercoming head is trapped.