Hi everybody!!! I'm just new in dialysis and I worked in acute unit I started 1 patient who underwent mechanical AVR for a couple of weeks already.For that couple of weeks he's not receiving heparin during dialysis.He was started Warfarin depending the INR level and was given Clexane stat dose a day before his dialysis.Blood sample for clotting screen sent before dialysis. I started giving minimal heparin 500 u maintenance dose as platelets is 277 and his recent INR level-1.5.On his last dialysis circuits was clotted bec. he's was not given heparin. My concern is should I still continue giving heparin during dialysis even he's taking warfarin tablets? I'm thinking it might alter the result of coagulation test. I want some opinions regarding these matter.