The Effect of Preoperative Recombinant Erythropoietin on Postoperative Hematocrit Level After Orthognathic Surgery

Compare the post-surgery red cell mass as indicated by hematocrit value of orthognathic surgery patients given iron supplementation and a single presurgery dose of erythropoietin alpha(EPO) and patients who did not receive either EPO or iron supplementation (NEPO)