To evaluate relationship between preoperative patient factors and usage of Allogeneic Blood and Blood products in Adult patients undergoing Cardiac Surgery- A prospective observational study

This study will be conducted to estimate the requirement of Allogeneic Blood and Blood products usage in adult patients undergoing Cardiac surgery, to determine the association between Allogeneic Blood and blood products usage, preoperative anaemia, haematocrit, Body Mass Index and Red cell mass, also to study any transfusion and non-transfusion related secondary outcomes following Cardiac surgery. Thromboelastography (TEG) machine which is the point of care viscoelastic testing will be used for assessment of coagulation and to guide administration of blood products.  Number of intraoperative and postoperative allogenic blood and blood products usages will be noted. Duration of cardiopulmonary bypass time will also be noted. Any post operative complication like prolonged mechanical lung ventilation, acute renal failure, renal failure requiring dialysis, surgical site infection, operative mortality and re exploration for bleeding will be noted.