Do serum potassium, phosphate, calcium, and magnesium concentrations suggest that intrarenal acute renal failure has developed?

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). 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.