Renal Failure Index (RFI)
Renal Failure Index (RFI) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
Open the Renal Failure Index (RFI) → Runs in your browser. No signup, no tracking.
What this is
Renal Failure Index (RFI) is one of 230 deterministic tools in Sophie Well's Clinical Scoring & Risk group. Renal Failure Index (RFI) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
Espinel CH. The FENa test. Use in the differential diagnosis of acute renal failure. JAMA. 1976;236(6):579-581. (Renal failure index; Miller TR, et al. Ann Intern Med. 1978.) Read the source ↗
Worked example: Renal failure index 0.67 — favors prerenal azotemia (< 1).
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