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Hematology Test

 

Blood volume/Plasma volume

Lab Test
Test Blood volume/Plasma volume
Indication The test measures the patient's total circulating volume of blood and/or fractions of the blood volume.
Physiology A component of the blood (e.g., Albumin) is labeled using a radioisotope. The dilution of the label is inversely proportional to the size (Volume) of the compartment in which it has been diluted.
Normal Range Click Here To View Normal Values
Interpretation This test differentiates relative from absolute polycythemia. Polycythemia is increased red cells and is opposite to anemia. Polycythemia is usually considered when hemoglobin is 18g/dL, hematocrit is 52% and RBC count is 6 million/mm3.
Test Results Dilution Technique using 125I – tagged albumin and/or 51Cr-tagged Red Blood Cells.
Related Tests Erythropoietin Test, Hematocrit Test, Peripheral Blood, Red Cell Mass.
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