![]() A low BUN-to-creatinine ratio may be caused by a diet low in protein, a severe muscle injury called rhabdomyolysis, pregnancy, cirrhosis, or syndrome of inappropriate antidiuretic hormone secretion (SIADH).Women and children may have lower BUN levels than men because of how their bodies break down protein.Drinking too much liquid may cause overhydration and cause a low BUN value.A low BUN value may be caused by a diet very low in protein, by malnutrition, or by severe liver damage.A very high BUN-to-creatinine ratio may be caused by bleeding in the digestive tract or respiratory tract. High BUN-to-creatinine ratios occur with sudden (acute) kidney problems, which may be caused by shock or severe dehydration.A high BUN value may be caused by a high-protein diet, Addison's disease, or tissue damage (such as from severe burns), or from bleeding in the gastrointestinal tract.Be sure to tell your doctor about all the non-prescription and prescription medicines you take. Consulting a doctor for abnormal levels is advisable. However, deviations from this range warrant prompt medical attention. Typically, levels between 6 mg/dL to 20 mg/dL suggest no concerns. Normal BUN levels could indicate health issues. High BUN levels can also be caused by low blood flow to the kidneys caused by dehydration or heart failure. Your BUN level of 14 is a Normal BUN level. Potassium balances the effects of sodium and helps keep fluid levels within a certain range. Lower or higher levels may indicate certain health conditions. However, typically, a normal range for adults is between 7 and 20 milligrams per deciliter (mg/dL). Kidney damage can be caused by diabetes or high blood pressure that directly affects the kidneys. This can lead to high blood pressure ( hypertension) and other issues. Normal BUN levels depend on various factors, including age, gender, and overall health. A high BUN value can mean kidney injury or disease is present.Reticulocyte count and reticulocyte hemoglobin content. Professional Version The trusted provider of medical information since 1899. b From The Ottawa Hospital laboratory (2019). Preparation Procedure Results Risks Takeaway Having low BUN levels doesn’t necessarily indicate a kidney problem. A value that isn't in the normal range may still be normal for you. Blood Tests: Normal Values - Etiology, pathophysiology, symptoms, signs, diagnosis & prognosis from the Merck Manuals - Medical Professional Version. Your doctor will also look at your results based on your age, health, and other factors. Your lab report should show the range that your lab uses for each test. A BUN-to-creatinine ratio can help your doctor check for problems, such as dehydration, that may cause abnormal BUN and creatinine levels.Įach lab has a different range for what's normal. Blood urea nitrogen (BUN) and creatinine tests can be used together to find the BUN-to-creatinine ratio (BUN:creatinine). The level of creatinine in your blood also tells how well your kidneys are working-a high creatinine level may mean your kidneys are not working properly. Blood urea nitrogen to creatinine ratio (BUN:creatinine)Ī BUN test may be done with a blood creatinine test. A low BUN level can occur normally in the second or third trimester of pregnancy. ![]() Liver disease or damage can lower your BUN level. Heart failure, dehydration, or a diet high in protein can also make your BUN level higher. If your kidneys are not able to remove urea from the blood normally, your BUN level rises. Urea is made in the liver and passed out of your body in the urine.Ī BUN test is done to see how well your kidneys are working. Urea is made when protein is broken down in your body. Further, BUN tests are often run in tandem with creatinine or renal panels to help identify kidney dysfunction.A blood urea nitrogen (BUN) test measures the amount of nitrogen in your blood that comes from the waste product urea. Additionally, a BUN test may be run to assess the functionality of the kidneys prior to certain surgeries or procedures that require the use of drugs that can damage the kidneys. As such, BUN tests can also be used to track the progress of a kidney disease. An unusually high BUN level may indicate that the kidneys are unable to effectively remove urea from the blood. A blood urea nitrogen (BUN) test measures the amount of nitrogen in our blood that has been created by urea and is typically ordered to assess kidney function. Healthy kidneys should filter out urea and other chemical waste products from the blood through urine. Urea then travels through the liver and into the kidneys via the bloodstream. ![]() The nitrogen reacts with other elements in our bodies (such as carbon, hydrogen, and oxygen) to form urea. After a protein is deconstructed, the liver produces nitrogen-containing ammonia. A healthy BUN result should fall into the range 7 – 28 mg/dL, or 2.50 – 10.00 mmol/L.īlood Urea nitrogen is a waste product formed during the process in which our bodies break down proteins.
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