Approximately 20% of RBC units are used for surgeries. Currently, hospitals estimate the risk of perioperative transfusions using historical charts known as the maximum surgical blood ordering schedule (MSBOS) for specific procedures. A new machine learning model, named the Surgical Personalized Anticipation of Transfusion Hazard (S-PATH), has been developed to provide more accurate estimations of perioperative transfusion risks. S-PATH considers…