Who is treating your for your RSD? I know you stated the hospital that they want to do the surgery at they don't know about RSD. I think though having a pain doctor who does will be important. Even if it is not at the place you have the surgery but at least someone you can call and see after.
Also if I was suggested surgery of any kind I would be getting a 2nd,3rd opinion to make sure there were no other options. So I would suggest that as well
I have heard ketamine infusions being done after a procedure or surgery I think. Also more as needed meds.
For myself the block made my pain worse. So I can't give much feedback on that. I wish I could give you more advice. Hang in there