There are other names for the hematocrit, such as packed cell volume (PCV), volume of packed red cells (VPRC), or erythrocyte volume fraction (EVF). Both are potentially life-threatening disorders. An abnormally low hematocrit may suggest anemia, a decrease in the total amount of red blood cells, while an abnormally high hematocrit is called polycythemia. Hematocrit levels that are too high or too low can indicate a blood disorder, dehydration, or other medical conditions. It is a part of a person's complete blood count results, along with hemoglobin concentration, white blood cell count and platelet count.īecause the purpose of red blood cells is to transfer oxygen from the lungs to body tissues, a blood sample's hematocrit-the red blood cell volume percentage-can become a point of reference of its capability of delivering oxygen. ![]() The measurement depends on the number and size of red blood cells. The hematocrit ( / h ɪ ˈ m æ t ə k r ɪ t/) ( Ht or HCT), also known by several other names, is the volume percentage (vol%) of red blood cells (RBCs) in blood, measured as part of a blood test.
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