الفهرس 
PHYSIOLOGY OF BLOODOnly 14 pages are availabe for public view
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Abstract
Blood transfusions are given to increase oxygen-carrying capacity and intravascular volume. Theoretically, increasing vascular volume is not an indication of blood transfusions, because volume can be augmented with administration of fluids that do not transmit infections. On the practical side, when a patient is hemorrhaging, blood is given to increase oxygen-carrying capacity and intravascular volume. However, increasing oxygen-carrying capacity is the only real indication for blood transfusions.Concerns about the safety and the cost of allogeneic blood have led to a renewed interest in blood conservation. Autologous blood collection techniques, including preoperative autologous donation, acute normovolemic hemodilution, and perioperative blood recovery are routinely used as alternatives to allogeneic transfusion. In the future these techniques maybe combined with pharmacological strategies, such as presurgical erythropoietin therapy or red cell substitutes to reduce further the need for allogeneic blood.