Your healthcare provider will compare your lab test results with reference values to see if any of your results fall outside the range of expected values. By doing so, you and your healthcare provider can gain clues to help identify possible conditions or diseases. In Europe, the whole urea molecule is measured , whereas in the United States only the nitrogen component of urea is measured the blood or serum urea nitrogen, i. The BUN is roughly one-half of the blood urea [ 3 ].
The range is wide because of normal variations due to protein intake, protein breakdown, state of hydration, liver urea production, and urea elimination by the kidneys [ 3 ]. Decreased or elevated BUN concentrations are usually seen in pregnancy [ 7 , 8 ]. The level of creatinine in your blood also tells how well your kidneys are working. The urea nitrogen test is often ordered for people who are experiencing signs and symptoms of kidney disorders. These symptoms can include:.
The causes shown here have been associated with elevated BUN, but this marker alone is not enough to diagnose any health condition. Do not attempt to self-diagnose based on this lab marker. Work with your doctor to determine an accurate diagnosis and to develop an appropriate treatment or management strategy. Commonly, a serum chemistry panel is ordered, which typically measures the levels of BUN, creatinine, and electrolytes.
In some instances, doctors may also follow up abnormal BUN results by evaluating the BUN-to-creatinine ratio in the bloodstream. Creatinine is a waste product that occurs after the muscles break down creatine.
Creatine is a product of amino acid metabolism made after protein breakdown, and it is necessary for the body, helping to produce energy and move the muscles. The ratio of BUN to creatinine is usually between and The course of treatment for each person with abnormal BUN levels varies depending on the cause and severity. Less serious health issues that lead to abnormal BUN levels might require less intense therapy and long-term monitoring.
People with more severe conditions, such as end-stage kidney disease, often need intensive and on-going treatment, such as dialysis. In the case of abnormal BUN levels caused by eating too much protein, people can limit the amount of protein-rich foods, such as meat, fish, beans, and dairy, and increase the amount of fruit and vegetables they consume. Staying well-hydrated also helps prevent the buildup of BUN. According to a cross-sectional study, a person with high BUN levels is more likely to have high blood pressure.
A survey of over 1 million military veterans from the U. BUN tests are easy to perform and may be a useful indicator of overall health and kidney and liver function. Urine is normally warm because it comes from inside the body, which has a core temperature of Hot urine occurs when urine is hotter than….
A urine specific gravity test shows the density of urine compared with water. It can help doctors diagnose a variety of conditions, including…. We take a look at uremia, a condition where urea builds up in the blood. Included are details on the symptoms and how to treat this severe condition. Ureaplasma is a form of bacteria that is often found in the urinary or genital tract and can be transmitted through sexual contact. Depending on your test results, your doctor may also run other tests to confirm a diagnosis or recommend treatments.
Proper hydration is the most effective way to lower BUN levels. A low-protein diet can also help lower BUN levels. Certain factors, such as dehydration, pregnancy, high or low protein intake, steroids, and aging can impact your levels without indicating a health risk. This may cause you to bleed more than expected during the test.
In rare cases, people become lightheaded or faint after having blood drawn. Notify your doctor if you experience any unexpected or prolonged side effects after the test. A BUN test is a quick and simple blood test commonly used to evaluate kidney function. If your doctor suspects you have a kidney disorder or another health condition, they will order additional tests to confirm a diagnosis and determine the cause. Kidney function tests are simple blood and urine tests that can help identify problems with your kidneys.
The kidneys filter waste materials from the…. Discover the link between type 2 diabetes and kidney disease, the leading cause for kidney failure in the United States. Learn preventive steps you…. A renal scan involves the use of radioactive material to examine your kidneys and assess their function.
There's no one sure way to prevent kidney stones, especially if you have a family history of the condition. The BUN test is a simple blood test that is used to measure kidney function. Your healthcare provider can order a BUN test for any person, even if they have no apparent symptoms or underlying conditions, and the result turnaround is pretty quick. If you should happen to receive an abnormal result, the course of treatment will depend on the cause and its severity.
For example, elevated BUN levels caused by dehydration indicate that a person needs to drink more fluids. More serious implications of abnormal BUN levels may result in additional testing or referral to a specialist.
Be sure to discuss your results with your healthcare provider. Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life. Blood urea nitrogen is independently associated with renal outcomes in Japanese patients with stage chronic kidney disease: a prospective observational study.
BMC Nephrol. Patient characteristics with high or low blood urea nitrogen in upper gastrointestinal bleeding. World J Gastroenterol. Persistent high blood urea nitrogen level is associated with increased risk of cardiovascular events in patients with acute heart failure. ESC Heart Fail. American Association for Clinical Chemistry. Laura J. National Library of Medicine. National Heart, Lung and Blood Institute. Types of Blood Tests.
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