Hematocrit:
The
hematocrit (Ht or HCT, British English spelling haematocrit), also known as
packed cell volume (PCV) or Erythrocyte Volume Fraction (EVF), is the volume
percentage (%) of red blood cells in blood. It is normally 45% for men and 40%
for women. It is measured an vital part of a person's complete blood calculate
results, along with hemoglobin attention, white blood cell (WBC) count, and
platelet count. Anemia refers to abnormally low hematocrit, as opposed to
polycythemia, refers to an abnormally high hematocrit. Both are strongly critical
disorders.
The term
hematocrit comes from the Ancient Greek words “haima” ("blood") and
kritēs ("judge"). It was coined by Magnus Blix at Uppsala in 1891 as
haematokrit, modeled later than lactokrit, which was used in dairy farming.
Hematocrit
is the blood test it measures the percentage (%) of the volume of whole blood
that is made up of red blood cells (RBC). This measurement depends upon the
number of red blood cells and the size of red blood cells.
How the Test
is Performed?
A blood sample is needed.
A blood sample is needed.
How the Test
will Feel?
When the needle is inserted to draw blood, some people feel more pain. Others feel only less pain. But this pain soon goes away.
When the needle is inserted to draw blood, some people feel more pain. Others feel only less pain. But this pain soon goes away.
Why the Test
is Performed?
The hematocrit is always ordered as part of a complete blood count (CBC).
The hematocrit is always ordered as part of a complete blood count (CBC).
Normal
results different, but in general are as follows:
Male: 40.7
to 50.3%
Female: 36.1
to 44.3%
Normal
results for child different, however in common are as follows:-
Newborn: 45
to 61%
Infant: 32
to 42%
The examples
above are common measurements for results of these tests. Normal value ranges
vary among different laboratories. A few labs use dissimilar measurements or
test dissimilar models. Speak to your physician regarding the significance of
your specific test results.
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