HI Lisa
I had a THR on 4/13 09 and ive had rsd since 1/109 . I had the surgery without a continous block,,bad mistake,,from what ive been told and from what ive read of your post,with the ketamine,,i truly think your going to be fine,,a biopsy isnt as invasive as a joint replacemnt,,thats what i was told,,mike on this blog is haveing some hernias fixed,,he is well knowledged pm him,,,,,I myself think that you are going to be fine,,and there will be prayers sent up for you,,Christ Jesus is the great Physcian and is over looking your surgery,,,good luck to you,,,,,,,,,,,,,,,,,bobber