What is BUN an abbreviation for in medical tests?

BUN stands for Blood Urea Nitrogen, which is a medical test that measures the concentration of urea nitrogen in the blood. Urea is a waste product formed in the liver from the breakdown of proteins. It is then transported in the blood to the kidneys, where it is excreted in urine.

The BUN test is significant in assessing kidney function, as elevated levels may indicate that the kidneys are not adequately filtering waste products from the blood. It is also used in conjunction with other tests, such as serum creatinine, to evaluate a variety of medical conditions related to kidney health, hydration status, and the body’s protein metabolism.

The other options do not accurately define the abbreviation BUN, making them incorrect. Understanding this term is essential when interpreting laboratory results and making clinical decisions regarding a patient’s renal function and overall health status.