This calculator calculates the fractional excretion of magnesium using magnesium, magnesium, creatinine, creatinine values.
Among the different accessible tests, normal value of fractional excretion of magnesium (FEMg) is a marker of an intact tubulointerstitial structure in patients with glomerular disease and also this value increases in early stages of chronic kidney disease.
Formula:
FEMg = [(Mg(U) × Cr(S)) ÷ (Mg(S) × Cr(U))] × 100
Where,Mg = Magnesium (S, mg/dL)
Mg = Magnesium (U, mg/dL)
Cr = Creatinine (S, mg/dL)
Cr = Creatinine (U, mg/dL)
FEMg = Fractional Excretion of Magnesium (%)