Fractional Excretion of Phosphate FEPO4 FEPO4 = Fractional Excretion of Phosphate (%) = [PO4 (Urine) * Creatinine (Serum)] / [PO4 (Serum) * Creatinine (Urine)] * 100 PO4 = Phosphate (S, mEq/L) PO4 = Phosphate (U, mEq/L) Cr = Creatinine (S, mg/dL) Cr = Creatinine (U, mg/dL) B= blood. S= serum. P= plasma. U= urine FEPO4 < 10% (< 0.1 fraction) = low FEPO4 > 20% (> 0.2 fraction) = high #Fractional #Excretion #Phosphate #FEPO4 #phosphorus #nephrology #Phosphorus
