Art:
Wish I knew the answer to that.
My sister had varicose vein surgery as an outpatient procedure in July 2009 and the day after was diagnosed with a clot in her leg. She was immediately put on warfarin & is still on warfarin. When I see her later this week, will ask her to find out what would be the protocol for have the same surgery while on warfarin.
I believe a vascular surgeon did her procedure.