Coumadin and V-beam Laser Treatments?

My friend and I both have Rosacea. I have had great results with V Beam laser. Although she is doing very well on Metrogel, she is wondering whether she could do V Beam also. However, she must take Coumadin. Is it possible to do facial V Beam with her medical condition? She does have lots of bruising in the hand and lower arm area from daily activities due to the Coumadin, if that information helps.