Table 11.6
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Urinary indices indicating AKI
Test Pre-renal Renal Post-renal

Urine osmolality (mosmol/kg)

>400–500

<350

Variable

Urine/plasma Cr ratio

>40

<20

<20

Urine Na (mmol/L)

<20

>40

Variable

FENa

<1%

>2%

Variable

Test Pre-renal Renal Post-renal

Urine osmolality (mosmol/kg)

>400–500

<350

Variable

Urine/plasma Cr ratio

>40

<20

<20

Urine Na (mmol/L)

<20

>40

Variable

FENa

<1%

>2%

Variable

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