– PT: Prothrombin Time – Time needed for blood to coagulate/clot ; provides a benchmark for efficacy of warfarin therapy (Coumadin). Not used as much as INR is used to measure warfarin effectiveness. 🩸Expected Range: Not on warfarin therapy: 10-14 seconds On warfarin therapy: 1.5-2x the original value – INR: International Normalized Ratio – A number derived FROM the PT (this is SO important to know!) ; provides benchmark for efficacy of warfarin therapy (Coumadin) ⭐INR is more widely used for t

Learn how to pinpoint the cause of prolonged PT / PTT and investigate bleeding in patients with normal PT / PTT. In this video, you will learn the mechanisms behind PT tests and how to interpret the results. You will be able to formulate a common differential diagnosis of prolonged PT and understand which tests to order next. Demystify hematology and coagulation with our fascinating Hematology & Coagulation Essentials course: http://bit.ly/2GgturE | Medmastery