The blood sample is taken to the lab, and serum is extracted. Just like a simple blood test, the BUN test also involves taking a blood sample from the vein of one of the arms.
Kidneys cannot filter the blood completely Above this number is considered a high BUn level, and doctors suspect that the patient’s kidneys might not be healthy. Generally, the normal range of urea nitrogen in the blood of a healthy person is 5 to 20 mg/dl. High BUN levels indicate that the kidney is not filtering out the nitrogenous waste properly. The reports for the BUN test will be delivered within 24 hours of sample collection.
The serum of the patient is examined for the amount of urea nitrogen in the blood. kidneys cannot filter the blood completely Kidney damage (due to metabolic diseases or trauma or injury) When the doctor suspects any of the following conditions in a patient, he or she asks for a BUN test. Hence, It is important to take the BUN test if you are in doubt about kidney damage, to avoid further complications and prevent the kidney damage from becoming worse. The urea nitrogen recirculates in the body through the blood and creates further problems. However, in case of renal problems, kidney damage due to high blood pressure or diabetes or kidney failures, kidneys cannot filter the blood completely. Our human body has a special mechanism to filter the nitrogenous waste out using kidneys. Urea is a nitrogenous waste of the body, and it is toxic if accumulated in the body. After the blood sample collection, you can resume your normal activities. The blood sample collected will be sent to the lab for examination. The report is prepared and sent to the doctor or directly received by the patient Examined for the amount of urea nitrogen present Medications – Inform the doctor about your ongoing medications.īUN test is a simple and safe test in which the lab specialist will take your blood from the vein of the arm after sterilising the area. Normal diet- No need to stop eating or drinking prior to the test Stay hydrated- Dehydrated body can result in false positive results
However, the person going for the test must keep in mind the following things Unlike other diagnostic tests, the blood urea nitrogen test does not require special preparations. The range is wide because of normal variations due to protein intake, Factors on which urea nitrogen range depends include Above this number, the patient’s kidneys might not be healthy. The amount of urea nitrogen in the blood depends on factors like hydration, protein catabolism, and renal dysfunctions. Factors on which urea nitrogen range depends includeĪ blood urea nitrogen test is a non-invasive blood test that shows how well the kidneys filter out the nitrogenous waste from the blood.
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