Systems and methods for positioning a connecting element adjacent the spinal column in minimally invasive procedures include instruments that guide the connecting element from a location remote from one or more anchors to a location proximate to the one or more anchors. The instruments include extensions...http://www.google.ca/patents/US7520879?utm_source=gb-gplus-sharePatent US7520879 - Surgical instruments and techniques for percutaneous placement of spinal stabilization elements
