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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, [1] [2] measured as part of a blood test. [3] The measurement depends on the number and size of red blood cells. [3] It is normally 40.7–50.3% for males and 36.1–44.3% for ...
Anemia is a deficiency in the size or number of red blood cells or in the amount of hemoglobin they contain. [1] This deficiency limits the exchange of O 2 and CO 2 between the blood and the tissue cells. [1] Globally, young children, women, and older adults are at the highest risk of developing anemia. [1]
Mean corpuscular volume (MCV) is the average volume of a red blood cell and is calculated by dividing the hematocrit (Hct) by the concentration of red blood cell count. [citation needed] = [] Normal range: 80–100 fL (femtoliter)
By multiplying the mean cell volume by the red blood cell count, the hematocrit (HCT) or packed cell volume (PCV), a measurement of the percentage of blood that is made up of red blood cells, can be derived; [66] and when the hematocrit is performed directly, the mean cell volume may be calculated from the hematocrit and red blood cell count.
The number of units that need to be removed to hemodilute to the maximum safe hematocrit (ANH) can be found by A N H = B L s 450 {\displaystyle ANH={\frac {BL_{s}}{450}}} This is based on the assumption that each unit removed by hemodilution has a volume of 450 mL (the actual volume of a unit will vary somewhat since completion of collection is ...
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The microhematocrit data along with the I-131 indicator data provide a normalized hematocrit number, more accurate than hematocrit or peripheral hematocrit measurements. [9] Measurements are taken 5 times at 6-minute intervals so that the BVA-100 can calculate the albumin transudation time to understand the flux of liquid through capillary ...
A hallmark of polycythemia vera is an elevated hematocrit, with Hct > 55% seen in 83% of cases. [20] A somatic (non-hereditary) mutation (V617F) in the JAK2 gene, also present in other myeloproliferative disorders, is found in 95% of cases. [21]