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A hematocrit blood test or an HCT blood test is a test where the total volume of red blood cells is checked vis-a-vis the volume of blood that has been drawn. The HCT blood test is therefore used to determine how much of the blood drawn is made up of red blood cells. There are two factors that are variables when it comes to the HCT blood test results. The number of red blood cells in the blood is one such factor. The other factor is the size of each red blood cell. Also read more ...
Hematocrit (Hct), the ratio of RBC to the total volume of blood; Based on the composition of blood cells, doctors can better know where to focus their investigation and which areas they can probably avoid. Normal Ranges of RBC Counts. An RBC count is the number of red blood cell per a particular volume of blood. It may be reported in millions of cells per microliter (mcL) of blood or in millions of cells per liter (L) of blood. The normal range can sometimes vary by population.