Objective To summarize clinical experience of adult cardiovascular operation without blood transfusion.Methods Take comprehensive measures to protect blood,such as preoperative blood coagulation adjustment suitable for the operation,rational allocation of intraoperative extracorporeal circulation piping systems,reasonable surgical techniques,effective hemostasis,use of blood collection and autologous blood transfusion technology.Results 516 of 648 surgeries were complished without blood transfusion and rate...