Renal function
Renal failure index (RFI)
UNa × PCr / UCr. >1 favors intrinsic AKI.
Required inputs
- Urine Na mEq/L
- Serum Cr
- Urine Cr
Equation or source
Espinel CH. JAMA 1976;236:579.
Renal function
UNa × PCr / UCr. >1 favors intrinsic AKI.
Espinel CH. JAMA 1976;236:579.