The Effect of Blood Transfusion on Endothelial Function

Blood transfusion is often used to treat patients with Anemia. The period of storage of blood products prior to use for transfusion may vary. Prolonged storage of blood products may result in changing their biochemistry. This study aims to look into whether the transfusion of "old" blood, which is stored for more than 7 days, as compared to the transfusion of "Fresh" blood, which is stored for less than 7 days, will affect endothelial function.