BUN is often ordered with creatinine when kidney problems are suspected. Some signs and symptoms of kidney dysfunction include: ... Increased BUN levels suggest impaired kidney function. This may be due to acute or chronic kidney disease, damage, or failure.
www.labtestsonline.org/understanding/analytes/bun/test.... www.labtestsonline.org/understanding/analytes/bun/test.html
Tests to monitor kidney function ; If you have been diagnosed with a kidney disease, your health care provider will order laboratory tests to help monitor kidney function. Blood levels of BUN and creatinine are measured from time to time to see if the kidney disease is getting worse.
www.labtestsonline.org/understanding/conditions/kidney-... www.labtestsonline.org/understanding/conditions/kidney-4.html
BUN stands for blood urea nitrogen. Urea nitrogen is what forms when protein breaks down. ... Some drugs affect BUN levels. Before having this test, make sure the health care provider knows which medications you are taking. ... The BUN test is often done to check kidney function.
www.nlm.nih.gov/medlineplus/ency/article/003474.htm
Kidney anatomy ... End-stage kidney disease occurs when the kidneys are no longer able to function at a level that is necessary for day to day life. It usually occurs as chronic renal failure worsens to the point where kidney function is less than 10% of normal. ... Creatinine and BUN levels are chronically high.
www.nlm.nih.gov/medlineplus/ency/article/000500.htm
Dehydration generally causes BUN levels to rise more than creatinine levels. This causes a high BUN-to-creatinine ratio. Kidney disease or blockage of the flow of urine from your kidney causes both BUN and creatinine levels to go up.
www.webmd.com/a-to-z-guides/blood-urea-nitrogen
Blood urea nitrogen - Wikipedia, the free encyclopedia
The blood urea nitrogen (BUN) test is a measure of the amount of nitrogen in the blood in the form of urea, and a measurement of renal function. Urea is a substance secreted by the liver, and remo...
en.wikipedia.org/wiki/Blood_urea_nitrogen
Increased BUN ... When a person has "syndrome of inappropriate anti-diuretic secretion" (SIADH), the anti-diuretic hormone responsible for stimulating the kidney to conserve water causes excess water to be retained in the bloodstream rather than being excreted into the urine.
www.rnceus.com/renal/renalbun.html www.rnceus.com/renal/renalbun.html
So – when we start to develop pre-kidney failure our BUN will tend to increase at a faster rate then the Creatinine – as a predictor, physicians will sometimes use the ratio of BUN to Creatinine.   Remember our 1/10 ratio I originally explained?  When that ratio climbs to 1/20 or higher, we are said to be...
kidneyinthenews.wordpress.com/2007/09/06/understanding-... kidneyinthenews.wordpress.com/2007/09/06/understanding-blood-urean-nitrogen-or-bun/
Parameter 1 Parameter 2 Description Comments ... Common Reference Ranges Adults 8-20 mg/dL; 2.9-7.1 mmol/L   ... QuickView Table of Blood Urea Nitrogen (BUN)
www1.shore.net/~straub/labsk_qvbun.htm www1.shore.net/~straub/labsk_qvbun.htm
BUN (Blood Urea Nitrogen) - Increases can be caused by excessive protein intake, kidney damage, certain drugs, low fluid intake, intestinal bleeding, exercise or heart failure. Decreased levels may be due to a poor diet, malabsorption, liver damage or low nitrogen intake.
www.drstandley.com/labvalues_renal.shtml