Friday, May 18, 2012

Remember

FeNa> 2% = intrinsic renal disease i.e acute tubular necrosis or acute interstititial nephritis

In prerenal azotemia e.g due to dehydration, FeNa is <1%, urine sodium is <20mEq/L, urine osmolality> 500mEq/L
Kidney reabsorbs Na and water to compensate for the hypovolaemia or hypotension.

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