urinary indices

index prerenal renal urinary sodium <20 meq/L >30 meq/L urine osmolality >600 mOsm/kg <350 mOsm/kg urine/plasma osmolality >2:1 <1.5:1 urine/plasma creatinine >20:1 <20:1 fraction excretion of sodium <1% >1% renal failure index <1% >1%

Specific

fractional excretion of calcium fractional excretion of phosphorus fractional excretion of potassium fractional excretion of sodium (FENA) fractional excretion of urate fractional excretion of urea renal failure index (RFI)

References

Saunders Manual of Medical Practice, Rakel (ed), WB Saunders, Philadelphia, 1996, pg 535