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renal failure index
(redirected from RFI)

    Also found in: Acronyms, Encyclopedia, Wikipedia 0.06 sec.
renal failure index (RFI),
an assessment of acute renal failure that compares the sodium clearance with the creatinine clearance:
RFI |m= UNa UCr/PCr
, where PCr |m= plasma concentration of creatinine, UCr |m= urinary concentration of creatinine, and UNa |m= urinary concentration of sodium. A value below 1.0 indicates renal failure because of prerenal azotemia, and a value above 2.0 suggests that it is caused by acute tubular necrosis.


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