About 15% to 20% of patients undergoing liver resections require RBC transfusions. Current guidelines propose a number of options to minimize blood loss and transfusion support, but all are based on little or weak evidence. Many options, including hypovolemic phlebotomy, aim to minimize intravenous fluid during liver surgery to maintain hypovolemia. Hypovolemic phlebotomy consists of removing about 10% of a…