Packed cell volume
Packed Cell Volume (PCV)
Packed Cell Volume (pronunciation: pakd sel vol-yoom), also known as Hematocrit (pronunciation: hee-muh-toh-krit), is a medical term referring to the volume percentage (%) of red blood cells in blood. The term originates from the words 'packed', 'cell', and 'volume', indicating the concentration of red blood cells in a given volume of blood.
Definition
Packed Cell Volume is a measure of the proportion of blood volume that is occupied by red blood cells. It is a useful indicator of the oxygen-carrying capacity of the blood. A low PCV percentage indicates anemia, while a high PCV percentage could indicate dehydration or a condition known as polycythemia.
Measurement
PCV is typically measured using a process called centrifugation. A sample of blood is placed in a tube and spun at a high speed. The heavier red blood cells move to the bottom of the tube, forming a distinct layer. The volume of this layer, expressed as a percentage of the total volume of blood, is the PCV.
Normal Range
The normal range for PCV varies between individuals, but is typically around 38.8% to 50.0% for males and 34.9% to 44.5% for females.
Related Terms
- Hemoglobin: A protein in red blood cells that carries oxygen.
- Erythrocyte: Another term for red blood cell.
- Complete Blood Count (CBC): A blood test that can include a PCV measurement.
See Also
External links
- Medical encyclopedia article on Packed cell volume
- Wikipedia's article - Packed cell volume
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