RBC, HBG, HCT, the change of blood coagulation index and the change of hemodynamics were recorded before AHH(T0), before surgery (T1), at the end of surgery (T2), 8 AM of the first day after surgery (T3) in the two experimental groups;

• 实验组在插管后稀释前即刻(T0),稀释后手术开始前即刻(T1),手术结束即刻(T2),术后第一日8AM(T3)时;