Predonated autogeneic blood holds the same risk of error as allogeneic blood, carries a
risk of bacterial contamination that may exceed that of allogeneic blood, and is subject to
the same detrimental effects of refrigerated storage outside of the body, which can
reduce the effectiveness of the transfusion. For these reasons, this approach is most
effective when there is a high expectation that the blood will be transfused; or in
exceptional circumstances, such as patients with multiple red blood cell antibodies or
rare blood groups, and patients who do not consent to allogeneic transfusion but accept
presurgically deposited autogeneic blood. This procedure is not usually accepted by
people with religious objections to transfusion