Urinary Diagnostic Indices in Prerenal Acute Kidney Injury and Acute Tubular Injury
Index | Prerenal | Tubular Injury |
|---|---|---|
U/P osmolality | > 1.5 | 1–1.5 |
Urine sodium (mmol/L) | < 10 | > 40 |
Fractional excretion of sodium (FENa)* | < 1% | > 1% |
BUN/creatinine ratio | > 20 | < 10 |
* U/P Na ÷ U/P creatinine. | ||
BUN = blood urea nitrogen; U/P = urine-to-plasma ratio. | ||
Adapted from Miller TR, Anderson RJ, Linas SL, et al: Urinary diagnostic indices in acute renal failure. Ann Intern Med 89(1):47-50, 1978; used with permission of the American College of Physicians and the author. | ||
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