True about acute tubular necrosis –
Correct Answer: Blood urea nitrogen :plasma creatinine ratio < 20
Description: . A blood urea nitrogen (BUN)/creatinine ratio (BCR) >20 (0.081 in international unit) is used to distinguish pre-renal azotemia (PRA) and acute tubular necrosis (ATN). However, there is little evidence that BCR can distinguish between these two conditions and/or is clinically useful. Ref Harrison20th edition pg 278
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