Acute Renal Failure: A Case Study

The diagnosis of acute renal failure is associated to the cause of the injury. Patient history can help determine the different etiologies. Distinguishing prerenal from intrarenal AKI can sometimes be challenging and the analysis of urine composition can provide diagnostic clues to changes in the tubular function. The BUN to plasma creatinine concentration ratios, and fractional excretion of sodium (the ratio of filtered sodium to excreted sodium) reflect renal tubular reabsorption ability could provide relevant diagnostic information. There is no tubular or glomerular damage in prerenal renal failure, so you would expect the BUN to plasma creatinine concentration ratios, and fractional excretion of sodium to be within the normal range, whereas