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What Does It Mean If You Excreted Slowly?
Fractional excretion of sodium (FENa) is the amount of salt (sodium) that leaves your body through urine compared to the amount filtered and reabsorbed by the kidney.
FENa is not a test, but rather a calculation based on the concentrations of sodium and creatinine in your blood and urine. Urine and blood chemistry tests are necessary to perform this calculation.
Alternative Names
FE sodium; FENa
How the test is performed
Blood and urine samples are sent to a lab, where they are examined...
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