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Fractional excretion of urea (FEUN) from BUN, urine urea nitrogen, and plasma/urine creatinine (Carvounis 2002). Use when diuretics make FENa unhelpful. Deterministic published formula with citation; not a diagnosis.

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https://api.magentlab.com/api/calc/feurea

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feureafeunkidneycalculator

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URL: https://api.magentlab.com/api/calc/feurea
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Sources: cdp, thirdweb

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