What is the blood urea nitrogen (BUN) test?
A blood urea nitrogen (BUN) test measures the amount of urea nitrogen in your blood. Levels of urea nitrogen is one marker on how well your kidneys are working. This is a simple test done by drawing blood out of your body through a vein in your arm.
Urea is a waste product formed in the liver that travels through your blood to the kidneys, which then filters it out of the blood. It is then carried out of your body through urine. A small amount of urea in your blood is normal because this process is ongoing. Too much urea shows that it is not being filtered out properly and may indicate a possible problem with the kidneys.
Why is blood urea nitrogen (BUN) test done?
A BUN test is a routine test ordered by your doctor during your checkup as part of a comprehensive metabolic panel (CMP) or basic metabolic panel (BMP). It will be done if you are admitted to an emergency room or during a regular hospital stay.
The BUN test may also be ordered as a precaution if you have risk factors for kidney disease. Free download for mac os. Early kidney disease doesn’t have symptoms, but the following factors can put you at higher risk:
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- Family history of kidney disease
- Heart disease
Urea nitrogen is a normal waste product that your body creates after you eat. Your liver breaks down the proteins in your food - and while it does that, it creates blood urea nitrogen, also known.
The BUN test is often ordered if the doctor suspects your symptoms are signs of kidney disease. These include:
- This test measures the blood urea nitrogen (BUN) level in the blood. Sometimes, a BUN to creatinine ratio is calculated to help determine the cause of elevated levels. Nitrogen is a component of both ammonia and urea.
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- Sep 29, 2018 A blood urea nitrogen (BUN) test is used to determine how well your kidneys are working. It does this by measuring the amount of urea nitrogen in the blood. Urea nitrogen is a waste product that’s.
- Fatigue
- Frequent urination or not often enough
- Urine that is discolored or unusual (bloody, foamy, coffee-colored)
- Swelling around the eyes or on the face, belly, arms, legs, or feet
- High blood pressure
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BUN
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
BUN
Farlex Partner Medical Dictionary © Farlex 2012
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.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
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.McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
BUN
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
BUN
Acronym for blood urea nitrogen. This is estimated when kidney function is in question.Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
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
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
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BUN
Medical Dictionary for the Dental Professions © Farlex 2012
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