Hématocrite

In Medicine, l'hématocrite (of the Greek haimato (αίματό, Blood) and Kritos (κρίτής, measurement)) is the relative Pourcentage Volume of the érythrocyte S (or globules red) compared to the total volume of the Sang.

This percentage corresponds to the relationship between the volume which occupy of the érythrocytes after centrifugation of a venous blood sample and centrifuged volume. It is an over-estimated approximation.

The examination making it possible to determine the hématocrite is called a hématocrite . It is quasi always coupled with the numeration of the érythrocytes.

This measurement is essential to calculate the average globular Volume or VGM and the average corpuscular Concentration in hemoglobin or CCMH.

Many pathologies can be responsible for anomaly of the hématocrite with initially all the etiologies of the Anémie.

Its value is variable according to the age and the sex. Indeed the hématocrite is more important at the man than the woman and it is more important in the infant than at an older person. At the man, the normal value is of 45% more or less 5%. At the woman, the normal value is of 42% more or less 5%.

See too

Hémogramme .
Animation explaining how one determines the hématocrite (academy of Creteil)

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