BUN


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BUN

 
blood urea nitrogen; see urea nitrogen.

BUN

Abbreviation and acronym for blood urea nitrogen.

BUN

Blood urea nitrogen. A measure of serum urea, a by-product of the breakdown of blood, muscle and protein. Urea is cleared by the kidney; diseases that compromise renal function lead to increased BUN.
 
Increased in
Renal disease, dehydration, CHF, GI bleeding, starvation, shock, urinary tract obstruction (e.g., by tumour or prostate gland).
 
Decreased in
Liver disease, malnutrition or a low-protein diet.
 
Ref range
Women 6–20 mg/dL; men 8–23 mg/dL; SI expresses nitrogen as urea—normal adults, 2.9–8.2 mmol/L; BUN/creatine ratio normally is 20:1.

BUN

Blood urea nitrogen Nephrology A measure of serum urea, a by-product of the breakdown of blood, muscle and protein; urea is cleared by the kidney, and diseases which compromise the function of the kidney will frequently lead to ↑ blood levels Normal range 7–20 mg/dL ↑ in Renal disease, dehydration, CHF, GI bleeding, starvation, shock, urinary tract obstruction–by tumor or prostate gland ↓ in Liver disease, malnutrition or a low protein diet Ref range ♀ 6–20 mg/dL; ♂ 8–23 mg/dL; SI expresses nitrogen as urea–normal adults, 2.9-8.2 mmol/L; BUN/creatine ratio normally is 20:1. See Azotemia, Uremia.

BUN

Abbreviation for blood urea nitrogen.

BUN

Acronym for blood urea nitrogen. This is estimated when kidney function is in question.

Blood urea nitrogen (BUN)

A waste product that is formed in the liver and collects in the bloodstream; patients with kidney failure have high BUN levels.

BUN

Abbreviation for blood urea nitrogen.
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