I'm slow in reading this-- but was hoping you could give more information about the Spring implant? My 17yr old daughter was diagnosed with CRPS after having surgery for TOS (that came about from competitive swimming).. she has been doing Ketamine every 9-10wks and that helps to give her somewhat of a life(she was able to pass school last year- but just barely- and we are again struggling with normal school- chronic pain really stinks)-- so Ketamine truly does lower the pain overall, but we would love to help lower it more. Her Anesthesiologist at VCU used to work for Mayo and he is one of the top doctors doing Sprint-- but we have been hesitant b/c he wants to put it in where she had TOS surgery and that area is so easily flared and when a ganglion stellate block was done in that area, it only made things worse.... So after the 60days with the Sprint, did the help in pain then stop? How low was your pain (on a 10scale)? Thanks for any help!