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Urine Indexes

- Urine indices that suggest prerenal AKI:
- - Urine specific gravity >1.018
  - Urine osmolality (mOsm/kg H2O) >500
  - Urine sodium (mEq/L) <15-20
  - Plasma BUN/creatinine ratio >20
  - Urine/plasma creatinine ratio >40
- Urine indices that suggest intrinsic AKI:
- - Urine specific gravity <1.012
  - Urine osmolality (mOsm/kg H2O) <500
  - Urine sodium (mEq/L) >40
  - Plasma BUN/creatinine ratio <10-15
  - Urine/plasma creatinine ratio <20