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A blood sample is spun in a test tube until the red cells settle to the bottom, and the percentage of RBCs is calculated: hematocrit.
What is Hematocrit?
- The hematocrit, also known by several other names, is the volume percentage (vol%) of red blood cells (RBCs) in blood, measured as a part of a blood test.
- The measurement depends on the amount and size of red blood cells. It's normally 40.7–50.3% for males and 36.1–44.3% for females.
- It is one of the components of a person's complete blood count, along with hemoglobin concentration, white blood cell count, and platelet count.
- Because the purpose of red blood cells is to transport oxygen from the lungs to body tissues, the hematocrit—the red blood corpuscle volume percentage—of a blood sample can be used to determine its ability to deliver oxygen.
- Too high or too low hematocrit levels can indicate a blood disease, dehydration, or other medical conditions.
- An abnormally low hematocrit may suggest anemia, a decrease in the total amount of red blood cells, while an abnormally high hematocrit is named polycythemia. Both are potentially life-threatening disorders.
Therefore, a blood sample is spun in a test tube until the red cells settle to the bottom, and the percentage of RBCs is calculated: hematocrit.
To learn more about Hematocrit:
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