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Wiktionary
hematocrit

alt. 1 (context medicine English) The percentage (by volume) of packed red blood cells in a centrifuged sample of blood 2 (context medicine English) A centrifuge used to analyze the relative amount of red blood cells and plasma in blood n. 1 (context medicine English) The percentage (by volume) of packed red blood cells in a centrifuged sample of blood 2 (context medicine English) A centrifuge used to analyze the relative amount of red blood cells and plasma in blood

WordNet
hematocrit
  1. n. the ratio of the volume occupied by packed red blood cells to the volume of the whole blood as measured by a hematocrit [syn: haematocrit, packed cell volume]

  2. a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood [syn: haematocrit]

Wikipedia
Hematocrit

The hematocrit (Ht or HCT), also known by several other names, is the volume percentage (vol%) of red blood cells in blood. It is normally 45% for men and 40% for women. It is considered an integral part of a person's complete blood count results, along with hemoglobin concentration, white blood cell count, and platelet count. Because 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. Additionally, the measure of a subject's blood sample's hematocrit levels may expose possible diseases in the subject. Anemia refers to an abnormally low hematocrit, as opposed to polycythemia, which refers to an abnormally high hematocrit. For a condition such as anemia that goes unnoticed, one way it can be diagnosed is by measuring the hematocrit levels in the blood. Both are potentially life-threatening disorders.

Usage examples of "hematocrit".

She was most concerned about the low hematocrit, the volume of red blood cells expressed as a percentage.

The hematocrit appeared first, testimony in faded green to the clinical acumen of the physician from whom it had been drawn.

He saw the details of his complete blood count and noted the elevated levels of his hematocrit, differential, and platelet count, as well as an increase in his blood volume.

They came in last week and their skin had cleared and their hematocrits were normal.