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1. The percentage by volume of packed red blood cells in a given sample of blood after centrifugation.
2. A centrifuge used to determine the volume of blood cells and plasma in a given sample of blood.

[hemato- + Greek kritēs, judge (from krīnein, to judge; see krei- in Indo-European roots).]


(hɪˈmæt ə krɪt)

1. a centrifuge for separating the cells of the blood from the plasma.
2. Also called hemat′ocrit val`ue. the ratio of the volume of red blood cells to a given volume of blood so centrifuged, expressed as a percentage.
[1890–95; hemato- + -crit < Greek kritḗs judge (see criterion)]

hematocrit, haematocrit

a centrifuge used for separating blood cells from the plasma.
See also: Blood and Blood Vessels
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hematocrit - the ratio of the volume occupied by packed red blood cells to the volume of the whole blood as measured by a hematocrit
ratio - the relative magnitudes of two quantities (usually expressed as a quotient)
2.hematocrit - a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood
centrifuge, separator, extractor - an apparatus that uses centrifugal force to separate particles from a suspension
measuring device, measuring instrument, measuring system - instrument that shows the extent or amount or quantity or degree of something


n. hematócrito.
1. aparato centrifugador que se usa en la separación de células y partículas del plasma;
2. promedio de eritrocitos en la sangre.


n hematocrito
References in periodicals archive ?
My position on this issue is this: The microhematocrit is a "primary" method--that is, a method against which other methods, controls, reagents, instruments and calibrators are standardized and, as such, cannot be QC'd in the traditional sense.
1) The packed cell volume (PCV) and plasma hemoglobin concentration can also be easily obtained in birds by centrifugation in microhematocrit tubes and spectrophotometry, respectively.
Blood samples were centrifuged in microhematocrit tubes at 12,000 rpm for 5 min, and the spun packed cell volume (PCV) was measured.
3 [micro]L) was used to measure blood glucose concentrations with the veterinary glucometer, and another 50 [micro]L was used to measure packed cell volume (PCV) by the microhematocrit tube method.
We do perform a rare spun microhematocrit (HCT) when the instrument HCT and the back-calculated HGB do not match.
Packed cell volume was evaluated after samples were spun in hematocrit tubes for 5 minutes in a microhematocrit centrifuge at 12 000g.
Hematocrit was determined on three individual fish randomly selected per aquarium by the microhematocrit method (Brown, 1980), and hemoglobin was measured with the same fish by the cyanmethemoglobin procedure using Drabkin's solution.
In our experience, the performance of a spun microhematocrit in clinics or nursing units is not adequate to determine the volume of packed red cells in a blood specimen.
Although blood samples centrifuged in a microhematocrit tube may maximize recovery of plasma from small-volume samples, plasma biochemical values from such samples have been implicated as causing erroneous results.
Haematocrit (PCV) was determined on three fish randomly selected from each batch of samples by the microhematocrit method (Brown, 1980), and hemoglobin (Hb) was measured with the same fish by the cyan-methemoglobin procedure using Drabkins solution.