have you looked into botox? I had symptoms very similar to frozen shoulder from my RSD. My PM sent me to a neurologist that does botox and although I had a bad reaction and it was a tough 6 weeks - when it was over, I gained back better than half what was frozen without any surgery or severe PT. I am still compromised, but much better. We are toying with doing another round of botox even though I had an unusually rough time of it... but I am doing fairly well and I hate to upset the boat. However, another round might give me 100% use back. It still hurts when I use it - from the RSD - but at least I can do things.

Might try it... it seems to work quite well for "stuck" areas and RSD.

I am not sure I understand what your problem entails with your hand, so this may not help at all... but if it would, I think I would try it before trying surgery.