Blood components are those products derived from whole blood (or platelet-rich plasma) collected from normal donors by phlebotomy (or hemapheresis) using the technique of differential centrifugation. These products are prepared in blood centers or hospital laboratories, and should be distinguished from plasma derivatives, which are fractionated from large volumes (thousands of liters) of plasma in large, industrial manufacturing sites.
This topic review will discuss the preparation of blood components.
Use of these blood components is discussed separately.
●Plasma – (See "Clinical use of plasma components".)
●Red blood cells – (See "Red blood cell transfusion in adults: Storage, specialized modifications, and infusion parameters" and "Red blood cell transfusions in the newborn" and "Red cell transfusion in infants and children: Selection of blood products" and "Indications and hemoglobin thresholds for red blood cell transfusion in the adult".)