An electronically guided spinal rod system for the placement of a spinal rod into the heads of pedicle screws and other types of bone fixation systems includes a bone screw inserter having rod access slots extending longitudinally for a length along the screw inserter, a rod detection system coupled...http://www.google.co.uk/patents/US7749232?utm_source=gb-gplus-sharePatent US7749232 - Electromagnetically guided spinal rod system and related methods
