Kidney Function Test Bun. Urea is also a metabolic byproduct which can build up if kidney function is impaired. The blood urea nitrogen bun test checks for other waste products in the blood such as urea nitrogen.
Abnormal levels indicate a kidney or liver related disease or condition. A simple test can be done to detect protein in your urine. Bun tests measure the amount of nitrogen in the blood.
Blood urea nitrogen test.
Abnormal levels indicate a kidney or liver related disease or condition. Tests to measure kidney function damage and detect abnormalities blood and urine tests show how well the kidneys are doing their job and how quickly body wastes are being removed. Urea is also a metabolic byproduct which can build up if kidney function is impaired. A gfr around 60 or below is a sign of kidney problems.