I have the Kowsy soft grip anatomical crutches and the Ossur Exolite wrist brace, but I have managed to break my brace using them together. The first time I used them, I didn't go far as I can't manage more than about 50m anyway, but the tough plastic bit that goes between your thumb and fingers has broken inside the rubber outer. I think this may be down to the way I tend to hold my wrists when using crutches, as my wrists are bent to about 90 degrees, and I think this caused too much stress on the brace. I had hoped that the brace would solve the bending problem, and therefore cause less pain, but now I can't use them together. They are excellent for night splints though as they don't have to be tight to give support.
Finally diagnosed March 2011 after 20 years of hypochondria!!!