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Anemia in both acute and chronic conditions is associated with an increased risk of organ injury (brain, heart, kidney) and mortality. Thus, anemia is not "safe". Impairment of tissue oxygen delivery likely contributes as a central mechanism; however, the existing treatments for anemia (i.e., transfusion, erythropoiesis stimulating agents, blood substitutes) have not produced a demonstrable improvement in patient outcomes despite their efficacy to increase blood oxygen content. Indeed, transfusion of red blood cells (RBCs) has been attributed to increase mortality in non-bleeding patients. Thus, the pathophysiology of anemia-induced morbidity and mortality and its treatments are complex and incompletely understood. New knowledge continues to emerge regarding the cellular mechanisms that maintain oxygen homeostasis during anemia. Nevertheless, the application of this knowledge has not yet led to improvements in patient outcomes. As both anemia and transfusion are associated with increased mortality, utilization of multimodal patient blood management strategies may be effective in avoiding both of these predictors of adverse outcomes. We propose to review new strategies to avoid both anemia and transfusion with the goal of improving patient outcomes and safety.

Review article: Risks of anemia and related management strategies: can perioperative blood management improve patient safety?