BUN
The BUN test measures the level of blood urea nitrogen (BUN) in your blood. Urea nitrogen is a waste product formed from the breakdown of protein, and its levels can provide important insights into kidney function. Clinicians order the BUN test to assess kidney health, evaluate hydration status, and help diagnose conditions affecting the kidneys or liver. It is commonly used in situations where kidney disease, dehydration, or other metabolic issues are suspected. Overall, the BUN test is a valuable tool in monitoring and managing various health conditions.
Test Essentials
Specimen Required
Blood
Test Category
Chemistry
Turnaround Time
Results for the BUN test are usually available within 24–48 hours after sample collection.
Clinical Information
Clinical Significance
Abnormal results from the BUN test can indicate various health issues. High BUN levels may suggest kidney dysfunction, dehydration, or increased protein breakdown, while low levels may imply liver disease or malnutrition. The diagnostic value of the BUN test lies in its ability to help healthcare providers understand your kidney function and overall metabolic state. However, only a healthcare provider can accurately interpret your results and determine their significance based on your individual health situation.
Reference Ranges
Reference ranges for the BUN test can vary depending on the laboratory, age, and sex of the individual. Generally, normal ranges may be provided by your healthcare provider based on the specific testing methods used. It’s important to remember that interpretation of these ranges should be done by a healthcare professional who will consider your overall health context.
Sample Preparation
Before your BUN test, you typically do not need any special preparation. However, it's always a good idea to inform your healthcare provider about any medications you are taking, as some may affect test results. If fasting is required, your healthcare provider will give you specific instructions. Generally, you can eat and drink normally before this test.
Related Tests
Code: 0212
Code: 0230
Code: P0204
Frequently Asked Questions
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