Fractional Excretion of Bicarbonate (FEHCO3)
Fractional Excretion of Bicarbonate (FEHCO3) - a deterministic tool in Sophie Well's Clinical Math & Conversions group.
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What this is
Fractional Excretion of Bicarbonate (FEHCO3) is one of 230 deterministic tools in Sophie Well's Clinical Math & Conversions group. Fractional Excretion of Bicarbonate (FEHCO3) - a deterministic tool in Sophie Well's Clinical Math & Conversions 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
Kurtzman NA. Renal tubular acidosis syndromes. South Med J. 2000;93(11):1042-1052. Cutoffs: Palmer BF, Kelepouris E, Clegg DJ. Renal tubular acidosis: core curriculum 2025. Am J Kidney Dis. Read the source ↗
Worked example: Fractional excretion of bicarbonate 1.67% — suggests distal (type I) RTA or normal (< 5%).
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