Urinary index
Encyclopedia
The urinary indices are the fractional sodium excretion
(FENa) index and the renal failure index (RFI).
The renal failure index = Urine Sodium * Plasma Creatinine / Urine Creatinine
.
Fractional sodium excretion
The fractional excretion of sodium is the percentage of the sodium filtered by the kidney which is excreted in the urine. It is measured in terms of plasma and urine sodium, rather than by the interpretation of urinary sodium concentration alone, as urinary sodium concentrations can vary with...
(FENa) index and the renal failure index (RFI).
The renal failure index = Urine Sodium * Plasma Creatinine / Urine Creatinine
Creatinine
Creatinine is a break-down product of creatine phosphate in muscle, and is usually produced at a fairly constant rate by the body...
.