It would probably help a lot to change how you position your hands.

If your keyboard is higher than your hands, your wrist bends and the carpel tunnel is strained.  If you raise your seat and/or lower your keyboard it will help help a lot.  

I have a folded triple wrist rest that I rest my mouse wrist on to make sure it is higher than the mouse.  

The idea is to be set up so your wrist and hand can be comfortably straight -- as they are when your arms are relaxed at your side when standing.