FEUrea Calculator
Calculate the Fractional Excretion of Urea (FEUrea) to assist in AKI diagnosis when diuretics make FENa inaccurate.
Input Parameters
Enter details for calculation.
FEUrea Score
Expert Tip
FEUrea < 35% is diagnostic of prerenal etiology. FEUrea is superior to FENa in patients receiving loop diuretics.
Calculation Methodology & Details
Formula
Evaluates urea clearance relative to creatinine to diagnose kidney perfusion deficits.
Important Disclaimer
The calculations provided are for educational and general informational purposes only. They do not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.
How FEUrea is Calculated
Follow these steps to use this calculator:
Enter Blood & Urine Labs
Input BUN, creatinine, and urine urea values.
Read FEUrea Score
Verify if prerenal (<35%) or intrinsic (>35%).
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ℹ️ About this Calculation
This nephrology and urology clinical calculator evaluates renal function, electrolyte/acid-base equilibrium, urinary excretion kinetics, and urologic disease risk according to KDIGO and AUA clinical practice guidelines.
Variable Glossary
Renal & Lab Metrics
Serum creatinine, urinary sodium/urea, albumin, PSA levels, or ultrasound kidney dimensions.
Diagnostic Indexes
eGFR (CKD-EPI equation), Fractional Excretion of Sodium (FENa %), serum anion gap, and PSA doubling kinetics.
How to Calculate Step-by-Step
Step 1
Enter serum electrolytes, creatinine, or urinary excretion lab values.
Step 2
Specify patient demographic parameters (age, gender, height/weight).
Step 3
View calculated clearance rates, CKD stage classification, or acute kidney injury (AKI) differentiation.