Which urine characteristics are indicative of acute tubular necrosis (ATN) caused by intrinsic (intrarenal) failure? A)Urine sodium 30 mEq/L B)Urine osmolality 500 mOsm C)Fractional excretion of sodium (FENa)

Question

Which urine characteristics are indicative of acute tubular necrosis (ATN) caused by intrinsic (intrarenal) failure?
A)Urine sodium >30 mEq/L
B)Urine osmolality >500 mOsm
C)Fractional excretion of sodium (FENa) <1%
D)Urine sediment has no cells, some hyaline casts

Quizplus · Accepted Answer

Urine sodium >30 mEq/L is the only option indicative of ATN. The other findings are associated with prerenal kidney injury.

Which Urine Characteristics Are Indicative of Acute Tubular Necrosis (ATN)