PCV/hematocrit:It measures the volume of red blood cell from whole blood in the sample
We take a blood sample centrifuge it we get 3 layers:plasma,buffycoat,suspended rbc cells
Out of these rbc(45%),plasma(55%),buffycoat(negligible)
So,we measure pcv in %...
Ranges are male:40-54%
Why we needed this????????
Probably for diagnosing I take avg pcv as 45%,then if we get below this 45%-Anemic
Above this 45%-polycythemic
How do we know this ???????????
Well by Macromethods:wintrobe,edta anticoagulant
Hope this helped