Which of the following is not true about intrinsic renal failure in case of ischemic ATN?: (A) Specific gravity < 1.015, (B) FENa < 1, (C) Urine sodium > 20 mmol/L, (D) Urine creatinine to plasma creatinine ratio < 20
Answer is C. Ans. c. Urine sodium > 20 mmol/L. (Ref H-18th/Table 44-2) Index Prerenal Azotemia *(lschemic ATN)Oliguric Acute Renal FailureBUN/PCr Ratio>20:110-15:1Urine sodium (UNa), mEq/L<20>40Urine osmolality, mOsm/L H2o>500<350Fractional excretion of sodium<1%>2%FENa=UN, x PCr x 100---------PNa,x UCr Urine/plasma creatinine (UCr/PCr)>40<20