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Blood volume/Plasma volume |
| Test |
Blood volume/Plasma volume |
| Indication |
The test measures the patient's total circulating volume of blood and/or fractions of the blood volume.
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| 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.
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| Normal Range |
Click Here To View Normal Values
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| 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.
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| Related Tests |
Erythropoietin Test, Hematocrit Test, Peripheral Blood, Red Cell Mass. |
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