If you read (research) the blog that anne h. wrote for a psychic (James Cottrell) - well in one of his newsletters he talks about carpal tunnel and how to relieve pain by putting weight on the hands..... preferably your own body weight as in the Yoga asana called the crow. This has helped me considerably, tho i must admit the pain comes and goes but then i don´t do the exercises as diligently as i should i guess;.)
Good luck and if it was me, i´d cancell the surgery date.....