In reply to james.slater:
Not had one of these ops James, but did have surgery to remove an extra artery (mutant alert!) which was in the same area, right in amongst the tendons. The artery developed a clot. I had carpal tunnel decompression, 26 stitches around wrist and 24 on forefinger - quite a lot of microsurgery. Looking at my diaries, I had the op in early June 2000, it was 7 weeks before I climbed at all, easy diffs at Windgather, and by the end of 3 months I was back leading E1. The surgeon did say that if they'd delayed treatment by 24 hrs they would not have been able to save my left hand, which would have been amputated - so in my case the surgery was definitely worthwhile.
Obviously no op is without risk, so you need to make your own calls.
I told the docs at my followup that I was a climber and I'd be putting a lot of stress on the area, and took their advice as to how and when to restart. Just listened to my body and built up very gradually. Wasn't extra hard work or anything. PM me if you need any more. And good luck.
Paul