Figure 2. The relationship between day of surgery hematocrit (Hct) levels and the percentage of patients transfused with blood from the blood bank (allogeneic or predonated autologous blood). The total number of patients (n) at each Hct level is indicated. The number of patients in each blood conservation group is presented below each n value. PAD = predonation of 3 U of blood; ANH = acute normovolemic hemodilution; ANH + rHuEPO = preoperative recombinant human erythropoietin therapy combined with acute normovolemic hemodilution.