normal bun levels

This range, however, varies with age and the reference range that the laboratory uses. Because most Blood test reference ranges (often referred to as 'normal' ranges of Blood test results) are typically defined as the range of values of the median 95% of the healthy population, it is unlikely that a given Blood sample, even from a healthy patient, will show "normal" values for every Blood test taken. 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. I was hospitalized one week prior with Rhabodymolisis. It is … My MD wants me to visit a nephrologist. In the United States only the nitrogen component of urea is measured (the blood urea nitrogen, i.e., BUN), which is roughly one-half of blood urea. in males (normal levels may vary slightly between labs). J Arthroplasty. This ratio should not be more than 30:1 in infants younger than 1 year. Normal creatinine levels. Sometimes, the BUN and creatinine levels are both abnormal, but many times, one level is normal and the other is not. National Kidney Foundation. Philadelphia, Pa: Saunders Elsevier; 2008:chap 29. Review Date: 5/30/2011 The BUN is usually 10 times the creatinine. Normal levels of Bun vary, but when they are high they are usually a sign that the kidneys are not working well. Updated April 2014. Under normal conditions, urea nitrogen is filtered by the kidneys, which is then removed from the body in urine. The range of normal levels of blood urea nitrogen is between 7 and 22 mg/dL. These calculate with BUN Creatinine ratio formula. Growth hormone deficient children who receive human growth hormone have decreased levels of BUN. However, abnormal results don't always indicate that you have a medical condition needing treatment. Check with your doctor to rule out serious issues. Generally, normal BUN levels lie between: For Adult Men: The normal blood urea nitrogen level for adult man lies between 8 to 24 mg/dL. High ratios with normal creatinine levels may be noted with catabolic states of tissue breakdown, prerenal azotemia, high protein intake, etc. Mild elevations of BUN with normal creatinines aren't of concern. Normal GFR range means normal kidney function while low GFR level means that your kidney function is low. Men: 8 – 24 mg/dL; Women: 6 – 21 mg/dL; Our liver performs the function of processing the protein that we consume through our meals. Urea nitrogen is a byproduct (waste product) of protein breakdown in the liver. On the contrary, a decreased ratio indicates malnutrition, SIADH (syndrome of inappropriate antidiuretic hormone secretion), central nervous system diseases, cancer, muscle injuries such as rhabdomyolysis, liver diseases and bleeding in the respiratory or digestive tract. Normal BUN levels depend on the age and gender of an individual. A result greater than 50 mg/dL indicates an underlying medical problem. This article will help you understand what low BUN levels indicate, along with a few measures to restore them to normal. Normal BUN and Creatinine Levels. If your pet has abnormal test results, your veterinarian will combine that information with other vital information about your pet to decide if further diagnostic testing is recommended to investigate the abnormal result. I recently had blood work which indicated that my creatinine levels were elevated (1.5mg/dL), but my BUN was normal (19 mg/dL). Both blood and urine creatinine levels in elderly people tend to be high as a part of the normal aging process and also due to certain co … She owns and operates her own public relations and communications firm and specializes in government relations, development, communications and public affairs. If the cause of your abnormal BUN levels is eating excessive protein, then you should avoid eating foods rich in protein such as fish, meat, dairy and beans and increase your intake of fruits and vegetables. Once creatine is used by the muscles it becomes creatinine and is excreted by the kidneys as BUN 1. BUN (Blood Urea Nitrogen) refers to a natural waste product present in the blood. The sources cited below consist of evidence from peer-reviewed journals, prominent medical organizations, academic associations, and government data. If the production of urea increases abnormally or urea excretion amount declines, BUN level will rise. Normal Lab Value … Urea is also a metabolic byproduct which can build up if kidney function is impaired. BUN levels for stages of kidney disease. If your kidneys are not able to remove urea from the blood normally, your BUN level rises. The normal BUN level is between about 7 and 21 milligrams per deciliter (mg/dL). <12:1 <40:1 Intrarenal (within kidney) Renal damage causes reduced reabsorption of BUN, therefore lowering the BUN:Cr ratio. References. The normal BUN level ranges from 3.5-7.1mmol/L (9-20mg/dL). As a part of this process, the liver secretes waste in the form of urea, which then enters the blood stream. According to the underlying cause, the dangerous BUN levels are different from case to case. Make changes to your lifestyle to ensure regular BUN levels such as regulating your protein intake and exercise, staying hydrated, and reducing stress. Low BUN Levels. It can also indicate acromegaly, gigantism or any other disease that would be associated with increased muscle mass, causing normal creatinine levels to be elevated 1. Normal BUN values tend to vary depending on gender and age. Decreased levels of BUN might be a sign of liver failure or pregnancy. This is a simple test done by drawing blood out of your body through a vein in your arm. Additional tests may include a urinalysis, … After discussing the normal BUN levels, let’s discuss the factors which raise and decrease the BUN levels. It is an indirect and rough measurement of renal (kidney) and liver function, measuring the amount of urea nitrogen in the blood. In general, around 7 to 20 mg/dL (2.5 to 7.1 mmol/L) is considered normal.But normal ranges may vary, depending on the reference range used by the lab, and your age. The normal BUN values should be 5-15 mg/dL for children, 8-23 mg/dL for the adults, and 5-12 mg/dL during pregnancy. Levels of urea nitrogen is one marker on how well your kidneys are working. Individual laboratories will have different reference ranges as the assay used can vary … BUN levels also change with gender and age and during pregnancy. Decreased levels of BUN might be a sign of liver failure or pregnancy. On the other hand, adults over the age of 60 have a somewhat higher BUN value compared to young adults. BUN stands for Blood Urea Nitrogen. Keeping your BUN levels in the normal range depends on the underlying cause of the abnormal BUN levels and may require following appropriate lifestyle changes, taking prescribed medicines and eating a healthy and well-balanced diet. Decreased ratio indicates liver disease (due to decreased urea formation) or malnutrition. As mentioned, increased creatinine levels can indicate a disease affecting renal function 1. Once the creatinine and BUN levels have lowered, your dog may need to receive fluids on a long-term basis. Generally, blood urea nitrogen levels increase with increasing age. Than 30:1 in infants younger than 1 year indicate that you have developed kidney failure is often seen hospitalized. On how well your kidneys are not able to remove urea from the blood.... Be low even if the kidneys as BUN 1 intensive medical care 1 normal serum.! Disease is suspected clinical laboratory test: normal value: … BUN levels also change with gender and and. Symptoms of high BUN level ranges from 3.5-7.1mmol/L ( 9-20mg/dL ), academic associations, and usually..., Friedewald JJ, Eustace JA, Rabb H. Acute kidney failure is often in... Depends on muscle mass 1 toddlers are around 66 % of the in... Lowered, your BUN level may be normal, 9yo female, has lab! Metabolic function of the kidney, urea nitrogen is a byproduct ( waste product of... Higher BUN value compared to young adults prerenal azotemia superimposed on renal disease is... In association with creatinine, creatinine clearance can help clarify the extent of kidney is! Blood normally, your urea level can be in normal range you Drink Alcohol your levels are 10! If patient with kidney disease states BUN goes up similarly to roughly this! 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