I am also looking for information regarding PNS . It must be fairly new as my Dr. has not performed the procedure an would like me to be the 1st. Says that his sister is a pain specialist in Chicago and she has had great success with it. I suffer from mostly pain in my feet along wit severe back pain. I tried the trial of the Vertiflex procedure. I had no relief after 7 days. Now I swear my feet are worse. Going to try Benfotiamine which was mentioned earlier on the platform. If you do get anything regarding the Sprint system , please post and I will do the same. Good luck...