，均系臀牵引术分娩.臀助产73例，臀牵引86例，剖宫产40例、牵引+穿颅术5例。
Their methods delivery included 73 cases of assisted breech delivery , 86 cnses of breech extraction , 40 cases of cesarean section and 5 cases of breech extraction plus craniotomy .
穿颅术