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Fractional Excretion of Sodium (FENa)

Determines if renal failure is due to pre-renal, post-renal, or intrinsic renal pathology.

mEq/L
mg/dL
mEq/L
mg/dL

Advice

Some experts recommend placing a foley catheter in all patients with acute renal failure to remove obstructive uropathy from the differential regardless of the FENa, and should be considered, especially in patients who are unable to provide information about their bladder and urination.