packed cell volume

packed cell volume
the volume of the red cells (erythrocytes) in blood, expressed as a fraction of the total volume of the blood. The packed cell volume is determined by centrifuging blood in a tube and measuring the height of the red-cell column as a fraction of the total. Automated instruments calculate packed cell volume as the product of the erythrocyte count and the measured mean red cell volume (mean corpuscular volume; MCV).

Medical dictionary. 2011.

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