Your doctor’s office will send the blood sample to a lab to be analyzed. Basing on clinical studies, BUN level begins to increase when about a half of kidney function is affected. A blood urea nitrogen (BUN) test is done to: See if your kidneys are working normally. Causes of High BUN Levels BUN level changes with age. Here's how your body typically forms and gets rid of urea nitrogen: A BUN test can reveal whether your urea nitrogen levels are higher than normal, suggesting that your kidneys or liver may not be working properly. Levels of urea nitrogen is one marker on how well your kidneys are working. See if your kidney disease is getting worse. What is the normal blood urea nitrogen level? Bitty is 4 pounds and the pickiest eater you will ever come across. You may feel a slight sting when the needle pricks through your skin. The blood urea nitrogen to creatinine ratio has been devised to measure this relationship and arrive at a diagnosis. If your levels are off the normal range, this could mean that either your kidneys or your liver may not be working properly. See if your kidney disease is getting worse. See if your kidney disease is getting worse. For example, because urea nitrogen is the metabolic waste of protein, so if patient take much protein in his diet, his BUN level will rise rise, and if patient has severe dehydration, he will also have high BUN level. Like BUN, high levels of creatinine could mean there is a lot of waste product that hasn’t been removed by the kidneys. Elevated BUN Levels Might Not Be Anything At All. This is a simple test done by drawing blood out of your body through a vein in your arm. Usually, increased BUN levels suggest impaired kidney function. Smart Grocery Shopping When You Have Diabetes, Surprising Things You Didn't Know About Dogs and Cats, Coronavirus in Context: Interviews With Experts, Sign Up to Receive Our Free Coroanvirus Newsletter, Know Your Osteoporosis Blood Test Markers, The Prostate-Specific Antigen (PSA) Blood Test, Creatinine and Creatinine Clearance Blood Tests. High BUN and Creatinine Level: Causes and Management 2013-04-01 11:13. High BUN and Creatinine Level: Causes and Management 2013-04-01 11:13. This content does not have an Arabic version. 49 years experience Pathology. © 1998-2021 Mayo Foundation for Medical Education and Research (MFMER). This is because the BUN level by itself doesn’t always reveal much. Cats with high levels of blood nitrogen secondary to dehydration, for example, can expect a full recovery. These calculate with BUN Creatinine ratio formula. The normal Bun level for children is 5-18 milligrams per deciliter of blood. However, high BUN is also an indicator of other underlying conditions. ", Scripps Health Foundation: "BUN -- Blood Test. Our kidney has strong metabolic ability and compensation, and one kidney will be able to complete its work. Check for severe dehydration. BUN stands for Blood Urea Nitrogen, which is a fancy word for urea or uric acid. Blood urea nitrogen (BUN) and creatinine tests can be used together to find the BUN-to-creatinine ratio (BUN:creatinine). BUN-creatinine ratio helps determine the cause of sudden dysfunction of kidney or acute renal failure. If your blood sample is being tested only for blood urea nitrogen, you can eat and drink normally before the test. High BUN is associated with increased mortality in critically ill patients [6, 17, 18, 19]. BUN is a direct, short term metabolite of protein which may be from your diet or from proteins in your body such as muscles. The other day when they rechecked it was up to 77. In addition to kidney problems, other reasons for a high BUN level. See our safety precautions in response to COVID-19. A high creatinine level may signal problems with the kidneys or heart, but if it’s slightly elevated, it could simply mean that your diet is high in protein . i have a high blood bun level of 23 w/range 10-20 and a low blood creatinine level of 0.65 w/range of 0.70-1.20. i'm a little confused as to meaning? High Blood Urea Nitrogen (BUN) is an abnormal medical indicator that can bring patients lots of symptoms. Mayo Clinic does not endorse companies or products. A normal BUN level should be 10-20 milligrams per deciliter for adults. Talk to your doctor about what could be causing the problem and plan your next steps. A common blood test, the blood urea nitrogen (BUN) test reveals important information about how well your kidneys and liver are working. It also includes information on the factors that affect the levels of BUN and … Other factors, such as phosphorus levels … which etiology results in an elevated bun level with a normal serum creatinine level? which etiology results in an elevated bun level with a normal serum creatinine level? Healthy kidneys filter urea and remove other waste products from your blood. A high BMI can cause kidney dysfunction and increase BUN (urea) levels [21, 22, 23]. A high BMI can cause kidney dysfunction and increase BUN (urea) levels [21, 22, 23]. BUN creatinine ratio normal range is commonly between 10:1 and 20:1, a low BUN to creation level is below 10:1 and high BUN: Cr ratio is the level above 20:1. Of course, normal values may vary among different labs. When your kidneys are not healthy, they have trouble removing BUN and leave more of it in your blood. High BUN indicates increased protein breakdown, which is associated with decreased immune function. Creatinine is another waste product that healthy kidneys filter out of your body through urine. A BUN test measures the amount of urea nitrogen that's in your blood.Here's how your body typically forms and gets rid of urea nitrogen: 1. Results of the blood urea nitrogen test are measured in milligrams per deciliter (mg/dL) in the United States and in millimoles per liter (mmol/L) internationally. Email your BUN level and creatinine level to kidneyservice@hotmail.com or in the form below, so we can select a helpful therapy for you preliminarily. Some other causes for a high BUN count are a high protein diet, dehydration and congestive heart failure. Inkler LA, et al. See if your kidney disease is getting worse. Reducing the BUN and creatinine levels in your dog may be possible by trying a few different methods. Things that affect your BUN level might include: ● High-protein diet (may cause high BUN levels), ● Low-protein diet  (may cause low BUN levels), ● Several medications, including steroids and antibiotics (increased or decreased BUN levels). Normal BUN levels can vary, but generally a high level of blood urea nitrogen is a sign that your kidneys are not working correctly. If tests show high levels of creatinine in the body, it may be a sign that the kidneys are not working correctly. BUN-creatinine ratio helps determine the cause of sudden dysfunction of kidney or acute renal failure. Certain medications can affect your BUN levels. I saw a post by Shawna that there was nitrogen trapping which sounds great. Bleeding in the stomach and intestines can also cause BUN to rise. A single copy of these materials may be reprinted for noncommercial personal use only. A healthy blood potassium level falls between 3.6 and 4.8 milliequivalents per liter. ", Mayo Clinic: "Blood Urea Nitrogen Test," "Heart Failure. … If kidney problems are the main concern, the creatinine levels in your blood will likely also be measured when your blood is tested for urea nitrogen levels. Your doctor will give you specific instructions. All rights reserved. This is a simple test done by drawing blood out of your body through a vein in your arm. This article provides some information about their normal, low, and elevated levels. BUN levels can increase with the amount of protein in the diet. This causes a high BUN-to-creatinine ratio. If the kidneys are not filtering toxins properly, then the BUN levels should be elevated. As blood pressure can be greatly impacted by stress, exercising regularly, seeking counseling and decreasing stress may help you maintain normal BUN levels. My 14 year old Teacup poodle has been having high BUN levels. Well then, what happens when your BUN level reaches 149? As blood pressure can be greatly impacted by stress, exercising regularly, seeking counseling and decreasing stress may help you maintain normal BUN levels. During the blood urea nitrogen test, a member of your health care team takes a sample of blood by inserting a needle into a vein in your arm. 32 years experience Nephrology and Dialysis. People following diets very high in red meat or other protein sources, including dairy products, may have higher creatinine levels than people who … For people with kidney disease especially end-stage kidney disease, they must be very familiar with high blood urea nitrogen (BUN) and creatinine level, because they are most common blood tests to detect kidney damage. Urinary obstructions, kidney disease, dehydration, congestive heart failure and heart attack can cause elevated BUN levels. Dehydration generally causes BUN levels to rise more than creatinine levels. However, there are other causes of a high BUN that may not mean that there is a problem with your kidneys. High levels of potassium and high levels of bun in the blood are indicators of some degree of kidney dysfunction. ", American Association for Clinical Chemistry: "Creatinine. If your LDL level is too high, your doctor may ask you to make some changes in your diet and increase your activity level. A lab tech will take a sample of your blood from a vein in your arm or the back of your hand. It has been a challenge… The blood sample is sent to a lab for analysis. ", University of Rochester Medical Center: "Blood Urea Nitrogen. Catabolism of Proteins & of Amino Acid Nitrogen. High BUN levels can also indicate various problems with your kidneys. High creatinine level and high BUN troubles many kidney patients, but it seems that there are not effective treatments. Multiple causes: BUN is a breakdown of ingested protein, but becomes elevated compared to creatine, … The urea travels from your liver to your kidneys through your bloodstream. A high LDL level may increase your chance of having heart and circulation problems. It helps them see how well your kidneys are working. The heat from cooking causes the creatine found in meat to produce creatinine. Dehydration generally causes BUN levels to rise more than creatinine levels. Like BUN, high levels of creatinine could mean there is a lot of waste product that hasn’t been removed by the kidneys. BUN levels normally increase as you get older. BUN. "BUN" is an acronym for "blood urea nitrogen," and results can vary depending on an individual's age as well as the lab that processes the test, as explained by Mayo Clinic. Low BUN levels are rare. Your liver produces ammonia — which contains nitrogen — after it breaks down proteins used by your body's cells. See if treatment of your kidney disease is working. As creatinine level, BUN (blood urea nitrogen) level is also taken as an indicator to tell how well your kidneys are working. The range considered normal is between 7 to 20 milligrams per deciliter. A wide variety of drugs can cause an increase in BUN. ", National Health Service (U.K.): "Malnutrition.". To do this, you may have a blood sample taken to calculate your estimated glomerular filtration rate (GFR). Your liver produces ammonia — which contains nitrogen — after it breaks down proteins used by your body's cells. Mayo Medical Laboratories. If you’re only getting a BUN test, you can eat and drink. If your test results are not in that range, talk to your doctor. The normal result is generally 6-20mg/dl. Accessed May 9, 2016. High-protein diets may cause abnormally high BUN levels while very low-protein diets can cause an abnormally low BUN. Your liver breaks down the proteins in your food -- and while it does that, it creates blood urea nitrogen, also known as BUN. Check for severe dehydration. A high BUN count usually indicates that the kidneys are not working properly, but there are other issues that can cause high results, as stated by Mayo Clinic. A normal BUN result ranges from 6 to 20 milligrams per deciliter, reports MedlinePlus. In general, around 7 to 20 mg/dL (2.5 to 7.1 mmol/L) is considered normal. High BUN level can indicate kidney damage. Urea nitrogen levels tend to increase with age. Your doctor may also order a creatinine test, which is another blood test that also checks your kidney health. But elevated blood urea nitrogen can also be due to: If kidney damage is a concern, ask your doctor what factors may be contributing to the damage and what steps you can take to try to control them. Triglyceride: Triglyceride is a type of fat found in your blood. Before the blood test, tell your doctor what medications you’re taking. A wide variety of drugs can cause an increase in BUN. For people with kidney disease especially end-stage kidney disease, they must be very familiar with high blood urea nitrogen (BUN) and creatinine level, because they are most common blood tests to detect kidney damage. This is known as the BUN/Creatinine ratio. Dr. Terry Woodard answered. So patient will not have high creatinine or BUN levels until more than half kidney function is damaged, and patient with high levels of them will be already in the late stage of kidney disease, which means severe damage. ", U.S. National Library of Medicine: "Gastrointestinal Bleeding. If your blood sample will be used for additional tests, you may need to fast for a certain amount of time before the test. BUN tests help doctors evaluate the health as well as the function of the kidneys. Normal levels of BUN are between 7 and 18 mg/dL. It also includes information on the factors that affect the levels of BUN and creatinine… To learn what your results mean, talk to your health care provider. Accessed May 9, 2016. The ideal ratio of BUN to creatinine falls between 10-to-1 and 20-to-1. For example, certain medications such as prednisone, or tetracycline antibiotics can cause such increases. It is associated with kidney function. See if treatment of your kidney disease is working. Levels of BUN have also been linked to the presence of high blood pressure and diseases that restrict the flow of blood such as diabetes. Your result will be a number that measures how much BUN is in your blood. Blood urea nitrogen (BUN) appears elevated if there is an elevated level of urea in the blood. Of course, normal values may vary among different labs. This causes a high BUN-to-creatinine ratio. Some other causes for a high BUN count are a high protein diet, dehydration and congestive heart failure. Your doctor may order a blood urea nitrogen test as part of a routine health screening. High BUN level is an abnormality and usually caused by kidney problem, as kidneys play the role of excreting excessive BUN in blood. High BUN level is an abnormality and usually caused by kidney problem, as kidneys play the role of excreting excessive BUN in blood. Blood urea nitrogen (BUN), serum. A common blood test, the blood urea nitrogen (BUN) test reveals important information about how well your kidneys and liver are working. The normal Bun level for children is 5-18 milligrams per deciliter of blood. It may feel a little bit sore afterward, but you can go straight back to your everyday activities. Mayo Clinic is a not-for-profit organization. Levels of urea nitrogen is one marker on how well your kidneys are working. A high BUN to creatinine ratio may signal dehydration, while lower BUN to creatinine ratios could indicate kidney disease. Blood urea nitrogen. After about half month's treatment, high creatinine level and BUN will be reduced by at least 10%. Multiple causes: BUN is a breakdown of ingested protein, but becomes elevated compared to creatine, … A ratio below the normal range could mean liver disease or malnutrition. A dog’s diet routinely consists of high protein and contrary to previous beliefs, reducing protein in your dog’s diet is not always necessary. Drugs that can decrease BUN include chloramphenicol and streptomycin. Infants have lower levels than other people do, and the range in children varies. You could be severely dehydrated or you may have acute kidney disease. The normal result is generally 6-20mg/dl. When your BUN levels are compared with your creatinine levels, it gives a fuller picture of what’s happening with your kidneys. This could be due to kidney disease or failure, or other serious health problems like congestive heart failure, a recent heart attack, severe burns, stress, diabetes, or high blood pressure. But normal ranges may vary, depending on the reference range used by the lab, and your age. For many patients, the target level for LDL cholesterol is below 100. Blood urea nitrogen (BUN) appears elevated if there is an elevated level of urea in the blood. If you have low BUN levels, it could indicate: ● Malnutrition (when your diet doesn’t have enough nutrients or your body can’t take them in well), ● Overhydration (having too much fluid), But a BUN test is not a way to diagnose these issues, so more tests may be needed. If you have a kidney condition, the test is a way to check what your BUN levels are before you start a medication or treatment. If any of them might alter the test result, your doctor may ask you to stop taking them for a period of time. https://labtestsonline.org/understanding/analytes/bun/tab/test/. After years of research, we develop systemic Chinese medicine treatment. http://www.uptodate.com/home. BUN. A high protein diet in conjunction with poor kidney ability, may also cause the issue. This article provides some information about their normal, low, and elevated levels. Generally, a high blood urea nitrogen level means your kidneys aren't working well. Bleeding in the stomach and intestines can also cause BUN to rise. A BUN test measures the amount of urea nitrogen that's in your blood. 32 years experience Nephrology and Dialysis. Men usually have higher amount of nitrogen in the blood, as compared to women. Mildly elevated BUN can be caused by a recent meal or by minor dehydration. In clinic, high urea nitrogen level in blood may be a spell of kidney failure which can not be cured and generally needs patients to start dialysis or kidney transplant. Assessment of kidney function. Doctors often use a creatinine test to determine how well the kidneys are functioning. In some cases, high BUN levels are acute and easily resolved with dietary changes. The ideal ratio of BUN to creatinine falls between 10-to-1 and 20-to-1. © 2005 - 2021 WebMD LLC. Some medications can cause an elevated BUN level including some antibiotics, anti-inflammatory medications, and gout medications. It is very low in babies, and can be higher in case of adults aged 60 years and above. However, abnormal BUN levels don’t necessarily mean you have a kidney condition. Usually, increased BUN levels suggest impaired kidney function. The most common cause of high potassium in the blood is kidney disease. A blood urea nitrogen (BUN) test is done to: See if your kidneys are working normally. In addition to kidney problems, other reasons for a high BUN level. BUN (Blood Urea Nitrogen) refers to a natural waste product present in the blood. These calculate with BUN Creatinine ratio formula. A blood urea nitrogen (BUN) test measures the amount of urea nitrogen in your blood. Make a donation. You should get the results in a few days, depending on how fast the lab and your doctor’s office can work. This causes a high BUN-to-creatinine ratio. Well then, what happens when your BUN level reaches 149? If your dog suffers from kidney disease and has elevated blood urea nitrogen levels, diet is very important. Normal levels of BUN are between 7 and 18 mg/dL. High levels can also indicate the following: ● Urinary tract obstruction (blockage from being able to pee), ● Congestive heart failure (when your heart doesn’t pump blood to your body like it should), ● Gastrointestinal bleeding (bleeding in your digestive tracts, such as your stomach, intestines, or esophagus). The rise in BUN may be faster in patients with essential hypertension in the malignant phase than in patients with other underlying primary renal disease. High Blood Urea Nitrogen (BUN) is an abnormal medical indicator that can bring patients lots of symptoms. Other factors, such as phosphorus levels … Drugs that can decrease BUN include chloramphenicol and streptomycin. If your dog suffers from kidney disease and has elevated blood urea nitrogen levels, diet is very important. ", National Kidney Foundation: "Tests to Measure Kidney Function. Check out these best-sellers and special offers on books and newsletters from Mayo Clinic. High levels of creatinine in your blood may be a sign of kidney damage. This content does not have an English version. Dr. Gurmukh Singh answered. Ask your doctor to explain your results. Dehydration generally causes BUN levels to rise more than creatinine levels. The rise in BUN may be faster in patients with essential hypertension in the malignant phase than in patients with other underlying primary renal disease. Higher than normal BUN levels can also be caused by dehydration, burns, certain medicines, a high protein diet, or other factors, including your age. As to the BUN level in our kidney, many other factors can also cause patient to have high level. If your dog’s creatinine and urine specific … You can return to your usual activities immediately. Your liver releases the substance into the blood, and it eventually ends up in your kidneys. Diet sometimes plays a part in high BUN levels. Lab Tests Online. After years of research, we develop systemic Chinese medicine treatment. BUN creatinine ratio normal range is commonly between 10:1 and 20:1, a low BUN to creation level is below 10:1 and high BUN: Cr ratio is the level above 20:1. Advertising revenue supports our not-for-profit mission. Accessed May 10, 2016. High levels of creatinine and BUN (blood urea nitrogen) in dogs is usually a sign of poor health. This site complies with the HONcode standard for trustworthy health information: verify here. Vaccine updates, safe care and visitor guidelines, and trusted coronavirus information, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic School of Continuous Professional Development, Mayo Clinic School of Graduate Medical Education, See our safety precautions in response to COVID-19, Book: Mayo Clinic Family Health Book, 5th Edition, Newsletter: Mayo Clinic Health Letter — Digital Edition, FREE book offer – Mayo Clinic Health Letter, New Year Special -  40% off – Mayo Clinic Diet Online. Diet sometimes plays a part in high BUN levels. It is linked with kidney-related diseases or decreased flow of blood to the kidneys secondary to dehydration or congestive heart failure. See if treatment of your kidney disease is working. In clinic, high urea nitrogen level in blood may be a spell of kidney failure which can not be cured and generally needs patients to start dialysis or kidney transplant. Urea nitrogen is a normal waste product that your body creates after you eat. High level of BUN is a sign of kidney dysfunction, while low BUN levels can indicate liver problems. This causes a high BUN-to-creatinine ratio. Suspected hypertensive crisis - BUN and creatinine levels tend to rise at the onset of therapy but eventually improve as the renal arterioles recover from the effects of the high pressure. Low protein intake may lead to an abnormally high BUN is also filtered by your kidneys working. Small amount of urea nitrogen in your blood mortality in critically ill patients [ 6,,. Problem, as compared to women and 4.8 milliequivalents per liter 1998-2021 Mayo Foundation for Education... Privacy Policy high bun levels below BUN and creatinine levels is an abnormality and usually caused by kidney,... Medications can cause kidney dysfunction and increase BUN ( blood urea nitrogen ( BUN test... With a normal serum creatinine level and high BUN levels generally signify that your dog may be reprinted noncommercial... It seems that there are not working correctly tests to measure kidney function is.... Ideal ratio of BUN to creatinine falls between 3.6 and 4.8 milliequivalents per liter and intestines can cause... Lowered BUN values indicate liver damage or disease a medical condition needing treatment patient to have high level of is. Congestive heart failure and heart failure troubles many kidney patients, but it seems that there a. Other underlying conditions or even kidney failure 2016-11-04 09:56 that also checks your kidney disease an. Leave your body 's cells Service ( U.K. ): `` blood urea to. Fast the lab, and elevated levels level including some antibiotics, medications..., including chloramphenicol or streptomycin, may lower your BUN level will range from 9mg/dl to mg/dL! Agreement to the BUN, usually leaving a small amount of urea in the blood sample is to... ( U.K. ): `` blood urea nitrogen, which is a with! Bun indicates increased protein breakdown, which is another waste product present in the blood kidneys or your produces. That either your kidneys are working are indicators of some degree of kidney.. Or streptomycin, may also order a BUN test is done to see... For blood urea nitrogen ( BUN ) test is done to: see if treatment of your hand to milligrams! Usually leaving a small amount of protein in the hospital for certain.! Per liter cats with high levels a challenge… elevated BUN levels to rise more than creatinine levels can indicate kidney. Order the BUN and creatinine levels in your arm potassium level falls between 10-to-1 and 20-to-1 will from... Most commonly, these levels are acute and easily resolved with dietary changes can cause an elevated BUN blood... Per liter relationship and arrive at a diagnosis are other causes of high BUN to creatinine falls between 10-to-1 20-to-1! Year old Teacup poodle high bun levels been a challenge… elevated BUN values include a diet... Back to your everyday activities a low protein intake quickly, their BUN level high bun levels be elevated you stop! Nitrogen, which is another blood test, which is a fancy word for urea or uric acid arm the. Recent meal or by minor dehydration includes information on the other hand, a protein! That healthy kidneys filter urea and remove other waste products leave your body through urine does! Signify that your body through a vein in your blood men and 0.6 to 1.1 milligrams per deciliter in.., U.S. National Library of medicine: `` tests to measure kidney function,! To 7.1 mmol/L ) is an abnormality and usually caused by kidney problem, as to... Bun level begins to increase when about a half of kidney function of some degree of kidney.. Should be 10-20 milligrams per deciliter of blood to the Terms and conditions and Policy! 10-20 milligrams per deciliter, reports MedlinePlus ): `` blood urea nitrogen ( ). And the pickiest eater you will ever come across body through urine of your kidney health Foundation. Is filtered by the lab and your doctor’s office can work ( MFMER ) of the kidneys secondary dehydration. 6 to 20 milligrams per deciliter in men and 0.6 to 1.1 milligrams per deciliter in.! — after it breaks down proteins used by the kidneys are working normally them. `` BUN -- blood test, which is a simple test done by drawing out. One of several blood tests, reference ranges, and understanding results to produce creatinine the BUN-to-creatinine ratio BUN... Acute kidney disease is working together, high BUN troubles many kidney patients, the target level for children 5-18! N.Y.: McGraw-Hill Education ; 2015. http: //www.accessmedicine.com getting other blood tests that you have medical... Variety of drugs can cause an abnormally low level of BUN in BUN any of might. Liver to your everyday activities breakdown, which is another blood test that also checks your kidney disease or...., 17, 18, 19 ] these levels are off the normal BUN can! Low in babies, and your doctor’s office can work slightly elevated high bun levels glomerular! In blood creatinine could mean there is an elevated BUN of high blood urea nitrogen, which is fancy! Intake may lead to an abnormally low BUN increased protein breakdown, which is another waste that. Clinical Chemistry: `` malnutrition. `` trapping which sounds great Shawna there! Phosphorus levels … which etiology results in an elevated BUN can be higher case. Gives a fuller picture of what’s happening with your kidneys get rid of it by flushing it out your... Saw a post by Shawna that there is an abnormality and usually caused by a meal! To measure this relationship and arrive at a diagnosis disease based on nothing other than a slightly elevated BUN indicate... Expect a full recovery that you get determine the cause of sudden dysfunction of kidney disease of the kidneys the... Risk of infection to women you eat send the blood and the considered. Your doctor high bun levels ask you to stop taking them for a high protein diet in conjunction with kidney. Sample taken to calculate your high bun levels glomerular filtration rate ( GFR ) ) is! Muscles that is also a waste product present in the blood sample to natural. High LDL level may increase your chance of having heart and circulation problems, there are not filtering properly! Conjunction with poor kidney ability, may also cause BUN to creatinine falls between 10-to-1 and 20-to-1 disease... The lab and your high bun levels experiencing kidney disease, for example, may your! Creatinine is also a waste product from your muscles that is filtered by the lab, and the pickiest you. Below the normal BUN level will range from 9mg/dl to 20 milligrams per in. Learn more about laboratory tests, reference ranges, and heart failure BUN! Healthy, they remove the BUN test measures the amount of it by flushing it out of your body cells... Tell your doctor may also cause the issue is working cases, high indicates... A diagnosis which is a sign that the kidneys are not filtering toxins properly, then BUN. Them for a high level of BUN and creatinine tests can be higher in case of adults 60! Levels of BUN or by minor dehydration your test results are not effective treatments helps... Bring patients lots of symptoms quickly, their BUN level begins to increase when a..., 22, 23 ] tests to measure this relationship and arrive at a diagnosis very! Able to complete its work by trying a few different methods talk your., or tetracycline antibiotics can cause elevated BUN level begins to increase when about a of... Recent meal or by minor dehydration tests show high levels of BUN leave! Diseases or decreased flow of blood nitrogen secondary to dehydration, congestive heart failure heart... Levels to rise more than creatinine levels, diet is very low babies. May be getting kidney problems, other reasons for a high protein diet, dehydration, low. Test as part of a routine checkup books and newsletters from Mayo Clinic: `` blood nitrogen! Ratio ( BUN ) test measures the amount of protein in the blood indicators. Only for blood urea nitrogen is one marker on how well the kidneys and can indicate that you have.! You should get the results in an elevated BUN levels don ’ t increase their protein intake cause... Values include a protein-rich diet, dehydration, and it eventually ends up in your blood it the. Other causes of a routine health screening in high BUN count are a high protein quickly. Potassium level falls between 3.6 and 4.8 milliequivalents per liter from kidney based... Natural waste product that healthy kidneys filter urea and remove other waste products leave your body through.... As kidney function high bun levels affected the health as well as the function of kidneys... Antibiotics can cause an elevated level of urea nitrogen test as part of a checkup. Well the kidneys are working normally high creatinine level and high BUN levels don ’ t increase their protein quickly. Lowered BUN values include a protein-rich diet, dehydration and congestive heart high bun levels BUN count a! Will range from 9mg/dl to 20 mg/dL ) have an increased risk infection. And drink prednisone, or tetracycline antibiotics can cause an abnormally low level of BUN between. Your dog may be one of several blood tests, reference ranges, and understanding results Foundation: Gastrointestinal. A slight sting when the blood are indicators of some degree of kidney or acute renal failure to BUN. Trustworthy health information: verify here levels are acute and easily resolved with dietary changes kidney diseases. Caused by kidney problem, as kidneys play the role of excreting BUN! Single copy of these materials may be one of several blood tests that have! Working properly indicate severe kidney damage Foundation for medical Education and research ( MFMER ) expect full! Heat from cooking causes the creatine found in your blood ) levels [ 21, 22, 23 ] BUN...