Management of Elevated PT and INR

Patient Assessment

The American Society of Anesthesiologists recommends determining if the patient is on warfarin or other vitamin K antagonists, as this is the most common cause of elevated PT/INR and fundamentally changes management 1, 2
The International Society on Thrombosis and Haemostasis suggests checking platelet count immediately to rule out concurrent thrombocytopenia, which increases bleeding risk five-fold when combined with coagulopathy 3
The World Journal of Emergency Surgery recommends reviewing medication history for antiplatelet agents, heparin, or direct oral anticoagulants, as these require different management strategies 1, 4

The American College of Cardiology recommends administering vitamin K 5-10 mg IV slowly for moderate bleeding in patients on warfarin with active bleeding 1
The International Journal of Stroke suggests that prothrombin complex concentrate (PCC) is strongly preferred over fresh frozen plasma because onset of action is rapid, though FFP can be used if PCC is unavailable 2
The Journal of Thrombosis and Haemostasis recommends dosing PCC based on INR: for INR 2-3.9 give 25 units/kg; for INR 4-5.9 give 35 units/kg; for INR >6 give 50 units/kg 1

The American Heart Association recommends that for urgent surgery or invasive procedures with INR 2.5, coagulation parameters should be normalized before proceeding unless it's a life-threatening emergency 6, 7
The American Stroke Association suggests that for stroke patients requiring thrombolysis, INR must be ≤1.7 and PT ≤15 seconds, otherwise rtPA is contraindicated 7, 8

The Anaesthesia society recommends maintaining INR monitoring quality by ensuring patients are in therapeutic range >56% of time through anticoagulation clinics or computer-assisted management 1
The Journal of Thrombosis and Haemostasis suggests that for patients with liver disease, anticipate more rapid development of dilutional coagulopathy and maintain fibrinogen >1.5 g/L and platelets >75 × 10⁹/L 1

The International Journal of Stroke recommends avoiding the restart of anticoagulation within 24 hours of major bleeding without repeat imaging and hematology consultation 2
The Journal of Thrombosis and Haemostasis suggests recognizing that PT/INR may be mildly elevated in COVID-19 without indicating warfarin effect 3