Certain factors, such as dehydration, pregnancy, high or low protein intake, steroids, and aging can impact your levels without indicating a health risk. However, abnormal BUN levels don’t necessarily mean you have a kidney condition. A medication wouldn’t be recommended to lower BUN levels. A low-protein diet can also help lower BUN levels. Proper hydration is the most effective way to lower BUN levels. High BUN levels can also be caused by low blood flow to the kidneys caused by dehydration or heart. Kidney damage can be caused by diabetes or high blood pressure that directly affects the kidneys. A high BUN value can mean kidney injury or disease is present. Keep in mind that some medications, such as certain antibiotics, can raise your BUN levels.ĭepending on your test results, your doctor may also run other tests to confirm a diagnosis or recommend treatments. Units, Nonpregnant Adult, First Trimester, Second Trimester, Third Trimester mg/dL, 7 -20, 7 -12, 3 - 13, 3 -11 mmol/L, 2.5 - 7.1, 2.5 - 4.3, 1.1 - 4.6, 1.1 -. A value that isn't in the normal range may still be normal for you. If you have kidney disease, this waste material can build up in your blood. The main job of your kidneys is to remove waste and extra fluid from your body. Elevated levels suggest impaired kidney function such as acute or chronic kidney. What is a BUN (Blood Urea Nitrogen) Test A BUN, or blood urea nitrogen test, can provide important information about your kidney function. There is no definite value of BUN that would diagnose kidney failure. A decline in kidney function can cause an increase in BUN levels. There may be slight variations between labs. The normal range of blood urea nitrogen (BUN) is between 7 and 20 mg/dL or 2.5 and 7.1 mmol/L. The relation is: Urea BUN 2.1428 or BUN Urea 0.4667. Normal BUN levels for adults over 60 are slightly higher than normal levels for adults under 60. The normal values of nitrogen in blood urea ranges from 7 to 20mg/dL. There is no definite value of BUN that would diagnose kidney failure. There are some circumstances to take into account about BUN normal ranges in the blood: It important to know if the values measured are the BUN levels used in the US and other countries or instead the values measured are the total urea used in Europe and around the world. children 1 to 17 years old: 7 to 20 mg/dL.In general, normal BUN levels fall in the following ranges: It’s also important to note that each laboratory has different ranges for what’s normal. Normal BUN values tend to vary depending on gender and age. Liver function tests may be done to see if there is a problem with the liver.įind out more about blood chemistry tests.Results of a BUN test are measured in milligrams per deciliter (mg/dL). Low GFR means that the kidneys are not filtering the blood very well and could suggest there is a problem with the kidneys.Ĭalcium and phosphorus levels may be high if you have kidney disease or if cancer has spread to the bone.Īlkaline phosphatase levels may be high if kidney cancer has spread to the bones or liver. The creatinine level in the blood is measured and is calculated with several other factors, such as your age, sex, height, weight and ethnicity, to determine the GFR. A normal eGFR is greater than 90, but values as low as 60 are considered normal if there is no other evidence of kidney disease. A healthy A1C reading for someone without diabetes is between 4 and 5.7. Interpreting Blood Urea Nitrogen (BUN) levels involves understanding the reference ranges. Normal blood calcium results in adults are: Total blood calcium: 8.5 to 10.5 milligrams per deciliter (mg/dL) Ionized calcium: 4.65 to 5.2 mg/dl. An A1C number is expressed as a percentage, with higher percentages indicating higher levels of glucose in the bloodstream. Low Levels, Normal Range Reference What Is a Blood Urea Nitrogen Test Medically Reviewed by Jabeen Begum, MD on OctoWritten by. It estimates how much blood is passing through the glomeruli, which are the tiny filters in the kidneys that remove waste from the blood. You should get the results in a few days. Glomerular filtration rate (GFR) is another test used to check how well the kidneys are working. Higher levels could mean that the kidneys are not working well, which could be because of cancer. Blood chemistry tests used to diagnose kidney cancer include the following.īlood urea nitrogen (BUN) and creatinine may be measured to check how well the kidneys are working. They show how well certain organs are working and can help find abnormalities. Blood chemistry tests measure certain chemicals in the blood.
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