Fractional Excretion of Sodium (FENa+)

 

 © Carl Kuschel
August 2003
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   Serum Sodium mmol/L
Urine Sodium mmol/L
Serum Creatinine mmol/L
Urine Creatinine mmol/L
The Fractional Excretion of Sodium is %.
FENa+ >2.5% in term infants suggests renal failure. FENa+ <2.5% in term infants suggests pre-renal failure.
This value in a term infant suggests .
  • The Fractional Excretion of Sodium is higher in preterm infants because of renal immaturity.