I am open to questions about the PNS or Pain pump. My PNS units all failed over the years for various reasons. I've had different manufactures for them. Medtronics being the most common. My pain pump is Medtronics and after 4 months it's working well except where the catheter moves in my spinal cord space and hurts at times. Well worth the discomfort for a 7 on the pain scale. The doc in CO at the University is only working on military personnel and is now down in Co Springs. The University won't touch PNS or SCS now and neither will that doc's old practice. They are parceling us out to other states for now. The rate of success isn't high enough to offset the cost they have said. I don't regret any of mine while they were working-they brought some relief for a few months each.