<span>Serum potassium, phosphate, calcium
and magnesium concentrations will not directly suggest intrarenal acute renal
failure. The confirmatory test for acute renal failure is the ratio of serum
creatinine and blood urea nitrogen (BUN). </span>They serve as indicators of decrease
renal function when there is a small amount of waste products primarily blood
urea nitrogen and creatinine found in the blood of the patient. Moreover, the
decline measurement of these two serum in the blood will be use for the
diagnosis of intrarenal acute renal failure.
