Medicine Which differentiating prerenal azotemia with ATN features favouring pre-renal A Urine osmolality > 500 mosmol/kg B Sodium spot excretion < 10 ml/L C Plasma transferrin/Ig ratio D none 💡 Explanation Which differentiating prerenal azotemia with ATN features favouring pre-renal ✓ Correct Answer: A. Urine osmolality > 500 mosmol/kg