Fractional Excretion of Magnesium (FEMg)
Estimates the fraction of filtered magnesium excreted in urine to separate renal magnesium wasting from extrarenal (GI) loss during workup of hypomagnesemia, valid only with normal kidney function.
Estimates the fraction of filtered magnesium excreted in urine to separate renal magnesium wasting from extrarenal (GI) loss during workup of hypomagnesemia, valid only with normal kidney function.