sorry to hear you have been struggling...crps often feels like you are walking through quicksand...the more you progress you feel like you are making the deeper you find yourself. i too had an ulnar nerve transposition a few years ago and my crps flooded the area. on a positive i had a revision of a scs on dec 12th and while the surgery itself is not much fun i am happy to report my crps didn't flair as a result. i know the idea of surgery with a disease with such a propensity for spread is scary but when it is the only option available a well educated surgeon is the best defense. i agree with the suggestion to ask the anesthesiologist to do a sgb prior to surgery. crps spread especially in individuals who have been dealing with it for some time is most often the result of some form of trauma, the greater the trauma the more likely a problem will result. the best way to avoid a bad result is to make the area as calm as possible and a block prior to the procedure should help.
i am so sorry you are experiencing so many road blocks...good luck