Methods, devices and systems facilitate diagnosis, and in some cases treatment, of back pain originating in intervertebral discs. Methods generally involve introducing one or more substances into one or more discs using a catheter device. In one embodiments, a patient assumes a position that causes back...http://www.google.com/patents/US7452351?utm_source=gb-gplus-sharePatent US7452351 - Spinal diagnostic methods and apparatus
