A measurement of urea nitrogen (a substance formed during protein breakdown) in the serum or plasma; an elevated BUN level may indicate impaired renal function.
Biochemical test used to evaluate renal excretory capacity and to diagnose renal disease. The level of urea in the blood is 8-20 mg/dL or 2.86-7.14 mmol/L.
Amount of nitrogenous material present in the blood as urea; it is an indicator of kidney function. Higher-than-normal levels occur in kidney failure, shock, gastrointestinal bleeding, diabetes mellitus, and some other disorders; lower-than-normal values are found in malnutrition and liver disease.
A diagnostic blood test; determines the amount of urea present in the blood that is directly related to the metabolic function of the liver and excretory function of the kidney.
Nitrogen in the blood in the form of urea, the metabolic product of the breakdown of amino acids used for energy production. The normal concentration is about 8 to 18 mg/dl. The level of urea in the blood provides a rough estimate of kidney function. Blood urea nitrogen levels may be increased in the presence of dehydration, decreased renal function, upper gastrointestinal bleeding, or treatment with drugs such as steroids or tetracyclines.
Within the liver, a byproduct of metabolic processes is generated, known as urea, which subsequently accumulates in the bloodstream. In individuals with impaired kidney function, such as those experiencing kidney failure, elevated levels of blood urea nitrogen (BUN) can be observed.