Fractional excretion of urea (FEUrea)
Prerenal versus intrinsic AKI when the patient has received diuretics.
Inputs
0 of 4mg/dL
mg/dL
Plasma creatinine
Patient values are shared with every calculator.
When to use
- AKI in patients on diuretics.
Pearls and pitfalls
- Below 35% suggests prerenal; above 50% suggests intrinsic injury.
Why use
Less affected by diuretics than FENa.
- where
- UUN
- Urine urea nitrogen, mg/dL
- BUN
- Blood urea nitrogen, mg/dL
- UCr, PCr
- Urine and plasma creatinine, mg/dL