Kidney Damage Blood Urea. A high bun value can mean kidney injury or disease is present. If kidney problems are the main concern the creatinine levels in your blood will likely also be measured when your blood is tested for urea nitrogen levels.
Decreased bun creatinine ratio may be due to intrarenal causes or conditions that directly damage the kidney itself. Many medicines may cause a high bun. Urine tests can also detect whether the kidneys are leaking abnormal amounts of protein a sign of kidney damage.
Healthy kidneys remove wastes and excess fluid from the blood.
Common conditions that damage the kidneys are glomerulonephritis acute tubular nephritis and acute interstitial nephritis. Here s a quick guide to the tests used to measure kidney function. If kidney problems are the main concern the creatinine levels in your blood will likely also be measured when your blood is tested for urea nitrogen levels. The damaged kidney cannot reabsorb urea and hence decreases the bun creatinine ratio.