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A blood product is any therapeutic substance prepared from human blood. This includes: whole blood; blood components; and plasma derivatives. Whole blood is not commonly used in transfusion medicine. Blood components include: red blood cell concentrates or suspensions; platelets produced from whole blood or via apheresis; plasma; and cryoprecipitate. Plasma derivatives are plasma proteins prepared under pharmaceutical manufacturing conditions, these include: albumin; coagulation factor concentrates; and immunoglobulins.
Blood products may also be called blood-based products to differ from blood substitutes, which usually refer to artificially produced products. Also, although many blood products have the effect of volume expansion, the group is usually distinguished from volume expanders, which typically refer to artificially produced substances and are thereby within the scope of blood substitutes.