Packed red blood cells

• abstract: In transfusion medicine, packed red blood cells (sometimes called stored packed red blood cells) are red blood cells (RBC, also called erythrocytes) that have been collected, processed, and stored in bags as blood product units available for blood transfusion purposes. The collection may be from a "whole blood" (WB) donation followed by component separation, or by RBC apheresis (sometimes called "double-red," due to the potential to donate two units' worth at once that way).

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