What is hematocrit and its function in blood?

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Dr Bhanu Prakash

General Practitioner

MBBS
AFIH
Advanced certificate in critical care medicine
Fellowship in critical care medicine
10+ Yrs

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This test measures the percentage of red blood cells in the blood which carry oxygen to all parts of the body. It also helps diagnose certain conditions which are caused due to too many or few red blood cells such as anemia.

Dr. Bhanu Suggests...

Take a LIPID SCREEN Test or Take a ASO/ASLO (Anti Streptolysin) Latex Test

Book LIPID SCREEN Test Book ASO/ASLO (Anti Streptolysin) Latex Test

Answered 24/07/2025

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I had a blood test one month ago, which showed hemoglobin 17 g/dL and PCV 52 percent. Today, after full hydration, my blood test shows hemoglobin 15.7 g/dL and HCT/PCV 44.1 percent. Is this normal, or could it indicate polycythemia?

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