4/29/2024 0 Comments Bun above normal range![]() For example, if your routine blood work includes a test for calcium in the blood, your lab may list the normal range for calcium as 8.3 to 9.9 milligrams per deciliter (mg/dL). When you look at a printout of your lab results, you’ll find the normal ranges for each blood test next to your personal results. About normal ranges and interpreting the numbers Suzanne Salamon, assistant professor at Harvard Medical School. In others, it might indicate an important change in health that we need to follow or act on,” says geriatrician Dr. Should you be concerned? “It’s tricky, because in some tests, a borderline result makes no difference. Picture this: you’re reading the results of your recent bloodwork, and you notice some numbers are teetering on the edge of the normal range. No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician. Please note the date each article was posted or last reviewed. When the BUN is out of range, healthcare providers will often refer to the creatinine clearance test or BUN/creatinine ratio for a more accurate assessment.ARCHIVED CONTENT: As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Small and large changes in BUN can occur from medications, dietary changes, and hydration status. Limitations of the test: The BUN test is a fast way to evaluate kidney function, but there are some limitations.When ordered as part of a basic or comprehensive metabolic panel, it can be used to evaluate a person's general health. ![]() BUN is usually used in conjunction with a creatinine test: The BUN test is primarily used along with the creatinine test to evaluate kidney function, as well as to monitor people with acute or chronic kidney dysfunction or failure.Before special tests: BUN tests may be ordered prior to some imaging studies like computed tomography (CT) scans and magnetic resonance imaging (MRIs) where contrast dyes that could damage the kidneys are used.Therefore, BUN is collected to monitor for kidney health and effectiveness of treatment in those who already have established kidney disease. Underlying health conditions: Diabetes and high blood pressure are two types of conditions that may affect the kidneys.Low levels of BUN may occur in people who have liver failure, women who are pregnant, and to those who are overly hydrated. Significant liver damage or disease may inhibit the production of urea which can cause BUN concentrations to fall. High levels can be seen in people who have gastrointestinal bleeding, high protein diets, infection, and dehydration. ![]() The liver may produce too much urea or the kidneys may not be able to filter the waste out of the blood, which can cause levels to be high.
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