الفهرس Only 14 pages are availabe for public view
 |  | from | 180 |  |  |
| | | from | 180 | | |
Abstract
Risks associated with allogeneic blood transfusion have lead to the development of a variety of blood-conserving techniques intended to minimize the need for allogeneic transfusion during surgery.Among these, acute normovolemic hemodilution (ANH) has become widely accepted .The procedure entails the removal of blood from the patient immediately before operation and simultaneous replacement with appropriate volume of crystalloid or colloid fluids. ANH reduces hematocrit so that blood shed during the operative procedure results in less erythrocyte mass loss. The removed blood is then reinfused as autologous whole blood after the procedure is completed.The procedure is simple and inexpensive and has the advantage that fresh autologous blood is readily available. The resultant reduction in allogeneic blood transfusion may conserve resources and protect the patient from exposure to the risks of allogeneic blood transfusion.Previous analyses of ANH have shown that, it may be effective in diminishing the need for allogeneic blood transfusion and that its efficacy depends on surgical blood loss, initial patient hematocrit, and the “transfusion trigger” which is the hematocrit at which blood should be transfused.Liver resection is considered as a major operation, but inspite of the improvements in surgical and anesthetic techniques, there is risk of major intraoperative blood loss and resultant blood transfusion. blood requirement that could be accommodated by the use of ANH.