The Effect Of Preoperative Acute Hypervolemic Hemodilution On Physiological Function In Patients Undergoing Epigastric Surgery

Background and ObjectiveWith the public concerns regarding the safety of transfused blood , how to avoid homologous blood transfusion and choose plasma substitutes has been an important topic. Preoperative autologous blood donation, postanaesthetic hemodilution (HD), improved surgical techniques , intra- and postoperative salvage of the patient's blood and its retransfusion, and acceptance of lower hemoglobin levels have all been used . Recent years, with the development of the study on the mechanism of hemodilution, preoperative hemodilution has become one of the most frequently used and effective technique for blood saving. It include two major methods: acute normovolemic hemodilution (ANH) and acute hypervolemic hemodilution (AHH). AHH is a new way of saving blood that was put forth in the nineties of twentieth century. To compare with acute normovolemic hemodilution (ANH), AHH save time and cost, and reduce contamination of blood, it will be more widely spread to use in clinic gradually. But the systemic investigation about the effect of preoperative acute hypervolemic hemodilution on acid-base equilibriumand and electrolyte is rare in clinic.At present, there are a large variety of plasma substitutes (Hydroxyethyl starch,...