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Etymology: AS, pol + Gk, plasma, something formed. A liquid component of whole blood, collected and pooled to prepare various plasma products or to use directly as a plasma expander when whole blood is unavailable or is contraindicated. It is useful in surgery and the treatment of hypovolemia because of ...

Etymology: ME, pakke + L, cella, storeroom, volumen, paper roll. A measured quantity of blood to which an anticoagulant has been added and the cells of which have been pressed together by the force of being centrifuged at 2000 rpm. Also called hematocrit reading.

Etymology: AS, gast + L, cella, storeroom. Red blood cells that have lost their hemoglobin so that only the plasma membranes are observed in microscopic examinations of urine samples. The hemoglobin is destroyed by the presence of urine. Also called shadow cells.

A transfusion of specific blood components instead of whole blood. Packed red cells or platelet-rich plasma suspensions may be transfused in larger quantities than would be possible if whole blood were used. More sophisticated processing provides fibrinogen or antihemophilic globulin solutions for ...

Etymology: It, banca, bench; AS, blod. Anticoagulated preserved blood collected from donors usually in units of 500 mL and stored under refrigeration for future use. Dated and identified as to blood type, it is stored for a usual maximum period of 21 days. Bank blood may be used in ...