Pilot Study to Examine the Feasibility of the Dynamic Interferential Spinal Cord Stimulation System™ (DISCSS™)

This investigation will be performed as a prospective, multicenter, open-label feasibility study. Thirty (30) patients with back pain greater than leg pain who were candidates for Spinal Cord Stimulation (SCS) and have successfully completed a percutaneous trial with a commercially available SCS system will be trialed with a 3-4 day exposure to the investigational DISCSS™ device. The trial will be conducted at 3-5 U.S. centers. The percutaneous trial leads from the commercial system will be connected to the External Pulse Generator of the DISCSS™ Trial System and the patients will be trialed for an additional three to four days. The investigational product for this feasibility trial will be the DISCSS™ system, not the commercially available trial SCS system. Exposure to the commercially available trial SCS system will be considered background therapy. The purpose of the background therapy phase is to establish baseline pain levels and determine patients' eligibility to continue to the investigational phase of the trial using the DISCSS™ SCS phase of the trial. Pain assessment and complications data from the commercial spinal stimulation system will be collected during the background therapy phase. The pain and complications data from the background therapy phase will not be analyzed in terms of the study endpoints.