Doctors order a blood urea nitrogen (BUN) test to measure the amount of urea nitrogen in your blood. It helps them see how well your kidneys are working. A BUN test measures how much blood urea ...

(Photo Credits: iStock/Getty Images) The 14 tests include alkaline phosphatase(ALP), alanine aminotransferase (ALT), aspartate aminotransferase (AST), bilirubin, blood urea nitrogen (BUN ...

blood test Previous studies have shown that an increased blood urea nitrogen to creatinine ratio is a poor prognostic marker in patients with certain chronic diseases. A relatively high blood urea ...