All calculatorsRenal

Fractional Excretion of Urea (FEUrea)

Alternative to FENa for distinguishing prerenal azotemia from intrinsic renal injury — useful specifically when the patient is on diuretics, which make FENa unreliable.

For healthcare professionals.These calculate a score or a measurement from values you enter. They do not diagnose, and they are no substitute for clinical judgement. If you are a patient, discuss any result with your own doctor rather than acting on it.

Urine Urea Nitrogenmg/dL

Plasma (Serum) Urea Nitrogen (BUN)mg/dL

Urine Creatininemg/dL

Plasma Creatininemg/dL

Enter the values above to see the result.

Source

Carvounis CP, Nisar S, Guro-Razuman S. Significance of the fractional excretion of urea in the differential diagnosis of acute renal failure. Kidney Int. 2002;62(6):2223-2229.

Shown for reference and checked against the source above. Confirm against current guidance before acting on it, and use your own clinical judgement.

These live inside Kyorit MD too

Specialists get the full set, including dosing and infusion calculators, alongside virtual chambers and board consultations.

Open Kyorit MD