NUT STARTER WRENCH FOR ORTHOPEDIC FIXATION SYSTEM

摘要

A tool assembly has a shaft (11) with a sleeve (21) slidable along it and hexagonal drive post (14) at its lower end to be received in a hex socket at the upper end (34) of a bone bolt secured in a patient's spine. A nut (33) to secure a connector (37) on the bolt, is temporarily stored on a short thread (16) on the shaft near the lower end. The sleeve (21) is slid down the shaft and a hex socket (23), its lower end is received on the nut. The sleeve is manually turned while a handle on a drive post prevents the shaft, and thereby the bolt, from turning. As the sleeve turns, the nut is turned off the short thread and down onto the bolt thread (34).