BUN stands for blood urea nitrogen. Urea nitrogen is what forms when protein breaks down.
A test can be done to measure the amount of urea nitrogen in the blood.
Alternative NamesBlood urea nitrogen
How the test is performedA blood sample is needed. For information on how this is done, see: Venipuncture
How to prepare for the testMany drugs affect BUN levels. Before having this test, make sure the health care provider knows which medications you are taking.
Drugs that can increase BUN measurements include:
Drugs that can decrease BUN measurements include:
When the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing.
Why the test is performedThe BUN test is often done to check kidney function.
Normal ValuesThe normal result is generally 6 - 20 mg/dL.
Note: Normal values may vary among different labs. Talk to your doctor about your specific test results.
The examples above show the common measurements for results for these tests. Some laboratories use different measurements or may test different specimens.
What abnormal results meanHigher-than-normal levels may be due to:
Lower-than-normal levels may be due to:
Additional conditions under which the test may be done include:
Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.
Other risks are slight but may include:
For people with liver disease, the BUN level may be low even if the kidneys are normal.
ReferencesClarkson MR, Friedewald JJ, Eustace JA, Rabb H. Acute kidney injury. In: Brenner BM, eds. Brenner and Rector's The Kidney. 8th ed. Philadelphia, Pa: Saunders Elsevier; 2008:chap 29.
Reviewed ByReview Date: 05/30/2011
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School, Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
The blood urea nitrogen (BUN) test measures the level of urea nitrogen in a sample of the patient's blood.
Blood Urea Nitrogen
Blood urea nitrogen.. Its a measurement of waste in the blood. usually used to determine kidney function
GlyCAT BLOOD TEST
The relevant level which is checked in a blood sample (and sent to the lab) is called the BUN (blood urea nitrogen). The normal BUN level is 6- 23 mg/dl in most labs.
This is the kidney function test called BUN (blood urea nitrogen). This test is critical in diagnosing kidney problems in patients.
The BUN test measures the amount of nitrogen in your blood that comes from the waste product urea. A BUN (blood urea nitrogen) test is done to see how well your kidneys are working.
The BUN test stands for blood urea nitrogen test. It is used to measure the urea and nitrogen levels in your blood in order to detect issues with the kidneys or liver.
Blood urea nitrogen.
BUN is the Blood Urea Nitrogen level test and is a test of kidney function used in comparison with glomerular filtration rate http://www.globalrph.com/labs_u.htm
The blood urea nitrogen (BUN) test measures the level of urea nitrogen in a sample of the patient's blood.
The BUN test is performed on a sample of the patient's blood, withdrawn from a vein into a vacuum tube. The procedure, which is called a venipuncture, takes about five minutes.
Blood urea nitrogen test (BUN). Urea is a by-product of protein metabolism. This waste product is formed in the liver, then filtered from the blood and excreted in the urine by the kidneys. The BUN test measures the amount of nitrogen.
An elevated BUN could be a sign of decreased kidney function. It could also be a sign of dehydration.
This is a lab test (from a blood draw) that checks electrolytes, BUN, creatinine, blood glucose, and liver enzymes.
There is no need to fast for a bun and creatinine test.
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