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Calculating Renal Failure Index,RFI Calculator

This RFI calculator determines the renal failure index value in patients who are suspect of acute kidney failure due to acute tubular necrosis. The renal failure index is obtained from measurements of urinary sodium, serum creatinine and urine creatinine.
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Renal Failure Index Calculator   

Urine   Sodium    

Serum Creatinine 

Urine Creatinine  




Calculation results of renal failure index value is 30.56%.An RFI>1 is consistent with oliguric acute renal failure,which can be accompanied by palpable bladder, hydronephrotic kidneys, renal calculi or enlarged prostate.
The renal failure index
The renal failure index is used to compare the sodium clearance with the creatinine clearance. It is one of several indices that help in
distinguishing prerenal azotemia from oliguric acute renal failure.

The renal failure index equation:
RFI= Na+(U)*Cr(S)/Cr(U)


Where:
RFI=The renal failure index(%)
Na+(U)=Urine Sodium(mEq/L)
Cr(S)=Serum creatinine(mg/dl)
Cr(U)=Urine creatinine(mg/dl)

A renal failure index greater than 1 is consistent with oliguric acute renal failure; an index less than 1 is consistent with prerenal Azotemia.




Top Use:    Calculating Renal Failure Index - Urine Sodium:60mEq/L Urine Creatinine:50mg/dL Serum Creatinine:0.7mg/dL

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