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Fractional Excretion of Sodium - FENa Fractional Excretion of Sodium (FENa) = (Urine Na+ x Serum Cr) / (Serum Na+ x Urine Cr) FEurea < 1% suggests prerenal etiologies FEurea > 2% suggests ATN - Dr. Eric Strong @DrEricStrong - Strong Medicine https://www.youtube.com/c/EricsMedi #FENA #Fractional #Excretion #Sodium #nephrology #calculation #diagnosis