Prothrombin time is essential during anticoagulation therapy. In oral anticoagulation therapy which test is essential?

  • Activated Thromboplastin Time – The partial thromboplastin time (PTT) test is a blood test that is done to investigate bleeding disorders and to monitor patients taking ananticlotting drug (heparin).

  • International Normalized Ratio – The Prothrombin time (PT) test, standardised as the INR test is most often used to check how well anticoagulant tablets such as warfarin and phenindione are working