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Haematocrit ( Hct )
Rate: Rs. 60
Sample
The patient blood is taken in EDTA.
It is stable for 48 hours at 4C and 6 hours at 23 C.
Importan facts
•The word hematocrit means to 'separate blood’ where blood cells and plsma are separated by centrifugation.
•While in electronic counters it is calculated by MCV.
•A caculated Hct is lower 2% than the microhematocritdue to trapped plsma in centrifuged colum of RBCs.
•Hct is lower in pregnant women than nonpregnant ladies.
Normal
Fetal 26-30 weeks = 41-54+- 3-31
•cord blood = 9 month+ 32-40 +-2
Men 42—52%
Women 36—48%
Significance
1.Decreased values are indicator of Anemia.
2.Decreased values are also seen in, Leukemia, Lymphoma,
Hodgkins disease. and Myeloproliferative disorders.
This test give information about RBC concentration and helpful to see hemoconcentration.
Raised Hct seen in
1.Poycythemia.
2.Extreme physical excercise or excitement.
3.High altitude.
4.Hemoconcentration.
Decreasesd Hct seen in
•Anemia.
