Where 60 represents MW of urea and 14*2 MW of urea nitrogen. Elsewhere, the concentration of urea is reported in SI units as mmol/L.ī U N m g / d L United States, Mexico, Italy, Austria, and Germany). The normal range of urea nitrogen in blood or serum is 5 to 20 mg/dl, or 1.8 to 7.1 mmol urea per liter. OTC deficiency is also accompanied by hyperammonemia and high orotic acid levels.īUN is usually reported in mg/dL in some countries (e.g. Reference ranges for blood tests, comparing urea (yellow at right) to other blood constituentsĪnother rare cause of a decreased BUN is ornithine transcarbamylase deficiency, which is a genetic disorder inherited in an X-linked recessive pattern. The main causes of a decrease in BUN are malnutrition (low-protein diet), severe liver disease, anabolic state, and syndrome of inappropriate antidiuretic hormone. Hypothyroidism can cause both decreased GFR and hypovolemia, but BUN-to-creatinine ratio has been found to be lowered in hypothyroidism and raised in hyperthyroidism. The main causes of an increase in BUN are: high-protein diet, decrease in glomerular filtration rate (GFR) (suggestive of kidney failure), decrease in blood volume ( hypovolemia), congestive heart failure, gastrointestinal hemorrhage, fever, rapid cell destruction from infections, athletic activity, excessive muscle breakdown, and increased catabolism. The normal range is 2.1–7.1 mmol/ L or 6–20 mg/ dL. Interpretation īUN is an indication of kidney health. It is not considered as reliable as creatinine or BUN-to-creatinine ratio blood studies. The test is used to detect kidney problems. Individual laboratories may have different reference ranges, as they may use different assays. On the flip side, if the liver is not producing enough BUN. Overproduction in the liver or under-excretion by the kidneys will cause BUN levels to rise above normal. Abnormal BUN levels may indicate problems with. When the liver and kidneys are working properly, BUN levels should be normal. A BUN test measures the level of urea nitrogen in the blood using a standard blood sample. Normal human adult blood should contain 7 to 18 mg/dL (0.388 to 1 mmol/L) of urea nitrogen. A blood urea nitrogen test is ordered as a diagnostic tool examining liver and/or kidney function. Blood urea nitrogen (BUN) is a blood test performed as a marker of kidney function. The liver produces urea in the urea cycle as a waste product of the digestion of protein. Your BUN test results will typically be available within a few hours after this procedure.6299-2, 59570-2, 12961-9, 12963-5, 12962-7īlood urea nitrogen ( BUN) is a medical test that measures the amount of urea nitrogen found in blood. A pathologist, a specialist in studying diseases, will collect a small blood sample from your veins using a needle. When your doctor recommends a BUN test, you'll likely undergo a simple blood draw specifically targeting the measurement of BUN. Reference Interval: Neonate: 1.0 - 4.0 mmol/L (may vary by laboatory) Adult: 3.0 - 10.0 mmol/L (may vary by age and gender) AACB Harmonised Australian Reference Intervals for Urea in Adults. Vehicle registration plates of Massachusetts Chelluru Coulx La Bussière-sur-Ouche Boisemont, Eure Golbey Wenshan Zhuang and Miao Autonomous Prefecture Curchorem Marcigny-sous-Thil Cassola Plomb Haux, Gironde Chananwindi Arakere Baliracq-Maumusson Mavalli Schaeffersheim Carrickmacross Montalto Dora Titusville, Florida Marby Madannapet Saint-Vougay Beaulieu-sur-Sonnette Mexico, Pampanga Pennedepie Shancheng, Nanjing County Oratino Conteville, Eure Namerikawa, Toyama Sari-d'Orcino Fiume Veneto Beaupont Lebesby Thumpoly Vallam Pudursethi Inexpressible Island Thinoor Chanvelly Valz-sous-Châteauneuf Réchicourt-le-Château Winnfield, Louisiana Doncourt-sur-Meuse Arces-Dilo Agalabagilu Jazirat Badiyah Lanneuffret Saint-Symphorien, Gironde Sanniriya Askvoll Keywords: Urea nitrogen, Blood Urea Nitrogen (BUN) Specimen: 5 mL blood in lithium heparin or SST/serum tube. This page was viewed the most from these cities in the last 30 days: Important : How our patients treated their
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