Minimally invasive methods and devices for introducing a spinal fixation element into a surgical site in a patient's spinal column are provided. In general, the method involves advancing a spinal fixation element in a first, lengthwise orientation along a pathway extending from a minimally invasive percutaneous...http://www.google.es/patents/US7527638?utm_source=gb-gplus-sharePatente US7527638 - Methods and devices for minimally invasive spinal fixation element placement
Methods and devices for minimally invasive spinal fixation element placement
