Fractional Excretion of Electrolytes
Info
Urine Electrolytes (U/L)
Serum Creatinine
unit mg/dL µmol/L
Serum Electrolytes (U/L)
Urine Creatinine
unit mg/dL µmol/L
R e s u l t s
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Fractional Excretion of Electrolytes
 
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Info
Fractional Excretion of Electrolytes

Measurement of electrolytes in serum and urine can be compared to assess renal damage.

The formula is:

  • FE Ele =100*(U Ele *S Cr )/(S Ele *U Cr )
  • FE Ele =% Excretion of Electrolytes
  • U Ele =Urine Electrolytes in U/L
  • S Cr =Serum creatinine in mg/dl
  • S Ele =Serum Electrolytes in U/L
  • U Cr =Urine creatinine in mg/dl