BUN

BUN blood urea nitrogen; see urea nitrogen.

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BUN

abbr.

blood urea nitrogen

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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.

Mentioned in: Acute Kidney Failure, Goodpasture's Syndrome, Kidney Function Tests

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BUN,

abbreviation for blood urea nitrogen.

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BUN,

n See blood urea nitrogen.

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BUN

blood urea nitrogen. See urea nitrogen.

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BUN : creatinine ratio

see creatinine: blood urea nitrogen ratio.

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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.