- Any known defect in coagulation, e.g. current use of vitamin K antagonist with an INR >1.7 or prothrombin time >15 seconds, or use of direct thrombin inhibitors or direct factor Xa inhibitors during the last 24 hours (unless reversal of effect can be achieved by agents such as idarucizumab or andexanet) or with elevated sensitive laboratory tests (such as activated partial thromboplastin time (aPTT), international normalized ratio (INR), platelet count, ecarin clotting time, thrombin time (TT), or appropriate factor Xa activity assays), or heparins during the last 24 hours or with an elevated aPTT greater than the upper limit of normal