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Distinguish prerenal from ATN — even on diuretics. Updated 2026-08.
Distinguish prerenal from ATN — even on diuretics
Enter your values above to see the result.
For education and screening only — not a substitute for professional medical assessment. Results should be interpreted by your healthcare provider.
Supports prerenal azotemia — the test of choice when the patient is on diuretics, where FENa is unreliable.
Suggests intrinsic tubular injury. Confirm with urine sediment (muddy brown casts) and clinical course.
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This content is a general reference, not medical advice, a diagnosis, or a treatment plan. Do not change your diet, fluids, medicines, or dialysis plan without your nephrologist or renal dietitian. Individual recommendations depend on your labs, medications, conditions, and care plan.