![]() You may be more likely to develop kidney disease if you have: BUN tests are also routine during hospital stays for certain conditions. If you need dialysis or medicine for kidney function, you may have the test to check the health of your kidneys before the procedure, after the procedure, or both. Depending on your overall health, it may be part of a routine health check to find out how your kidneys are working. You may need a BUN test for other reasons. The GFR estimates the percentage of kidney function you have. To do this, you may have a blood sample taken to calculate your estimated glomerular filtration rate (GFR). Your doctor may also test how well your kidneys are removing waste from the blood. Your health care professional might also perform this test if you:Ī) have symptoms of kidney disease, such as urinary changes, swelling in your arms or legs, muscle cramps, or frequent episodes of fatigue, orī) if you have a higher risk of kidney disease because of diabetes, cardiovascular problems, or a family history of kidney disease.Ĭ) need to monitor for side effects when you begin a new medication that can affect the kidneys. This panel is usually performed at your biannual health check up. The biomarker Blood urea nitrogen (BUN) is part of a standardized blood test panel called the Comprehensive Metabolic panel (CMP). You may have a condition that’s affecting your kidneys’ health. If you have too much urea nitrogen in your blood, your kidneys aren’t filtering it properly. A small amount of urea nitrogen in your blood is normal. Urea nitrogen levels in your blood are one marker that allows healthcare providers to understand how well your kidneys are working. Abnormal levels may indicate a health condition, including kidney damage. A BUN test can help uncover kidney problems at an early stage when treatment can be more effective.īUN levels vary according to your age and sex. People with early kidney disease may not have any symptoms. It helps a healthcare provider determine if your kidneys are working as they should. The blood urea nitrogen (BUN) test measures how much urea nitrogen is in your blood. If the kidneys are damaged and not functioning properly, urea and the nitrogen it contains are not filtered fully from the blood. The BUN level in the blood is, therefore, stable. If all is going well, there is a continuous amount of urea being produced and being excreted by the kidneys into the urine. Urea is filtered out of the blood by the kidneys. The liver transforms ammonia into urea to make it less toxic and sends the urea out into the bloodstream. This produces nitrogen-containing ammonia as a byproduct, which is excreted into the bloodstream. Your cells break protein down into amino acids to build back up into the proteins they need for various processes. You get protein from the food you eat, and it enters the bloodstream from the intestines to be used by cells throughout your body. BUN is a waste product of cell metabolism. Your blood urea nitrogen (BUN) level is based on a blood test that measures the amount of urea nitrogen in your blood. Over time, this may lead to serious health problems, including high blood pressure, anemia, and heart disease. When your kidneys are not working well, your BUN level goes up. But for the most part, your kidneys get rid of it by flushing it out of your body through urine. ![]() When your kidneys are healthy, they remove the BUN, usually leaving a small amount of it in the blood. It forms in your liver and travels through your blood to your kidneys, which then filter it out of your blood. It develops when your body breaks down the protein in the foods you eat.
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