<qa>  What is the TEG and coagulation testing?Prior to any resuscitation with blood, blood products, or reversal agents, the investigators will obtain a TEG as well as standard coagulation testing: prothrombin time, partial thromboplastin time,international normalized ratio PTPTTINR. TEG and coagulation studies will be obtained as soon as possible on admission and again following reversal of rivaroxaban if reversed as SOC or at 24 hours post admission to assess for changes. 