I just need a BASIC explanation of the connection of PT,PTT,INR and coumadin. What elevated and low lab values mean, etc. For some reason this is one of those things that perplexes me.
Apr 12, '02
pt (prothrombin time) measures coumadin effect(warfarin).. antidote vit k
*warfarin works s l o w l y/ vit k works s l o w l y.
the thromboplastin (testing material) various labs used was different so the results were different lab to lab. so labs started reporting inr with the pro-time.
the inr (international normalized ratio) is calculated with a math. formula so all results from all labs can be compared.
.....fyi: hemophiliacs have normal pro-times.
ptt (partial thromboplastin time) measures heparin effect. antidote is protamine.....
*heparin works quickly/protamine works quickly
Last edit by P_RN on Apr 12, '02