Fractional Excretion of Urea - FEurea Fractional Excretion of Urea (FEurea) = (Urine Urea x Serum Cr) / (Serum Urea x Urine Cr) FEurea < 35% suggests prerenal etiologies FEurea > 35% suggests ATN - Dr. Eric Strong @DrEricStrong - Strong Medicine https://www.youtube.com/c/EricsMedi #Fractional #Excretion #Urea #FEUrea #nephrology #calculation #diagnosis