Pre-renal azotemia is associated with one of the following characteristic feature:
Ans. is 'a' Urinary Na+ < 10 mmol/litre Explained earlier
Urinary Na+ < 10 mmol/L
Renal failure index > 1
Osmolality < 500
Urinary creatinine / P. creatinine ratio < 20
Acute Renal Failure