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20 Jul

BUN/Creatinine Ratio Test

Brief summary:

Blood Urea Nitrogen (BUN) is a common blood test that reveals important information about the efficient working of one’s kidney and liver. A BUN test reveals the amount of urea nitrogen present in one’s blood. 


Test Process:

Blood urea nitrogen (BUN) test is used to determine how well your kidneys are working. Having too much urea nitrogen in the blood or having high BUN levels can be a sign of kidney or liver problems. The test process is done with a lab technician drawing out blood from a vein in one’s arm or the back of the hand. After cleaning the area with an antiseptic wipe, the technician wraps a band around the hand in order to create pressure in the area where the needle will then be inserted. Blood is collected in a tube attached to the needle after which the band and needle are taken out. Pressure on the puncture site is added to stop any bleeding.


Test Precaution:

Although there is no special preparation required, any prescription or over the counter medication should be disclosed to the doctor as some pills can alter one’s BUN level. 

Some medications, including chloramphenicol or streptomycin, may lower your BUN levels. Other drugs, such as antibiotics and diuretics, may increase your BUN levels.


Test Outcome:

The blood urea nitrogen or BUN test along with the creatinine test is done to evaluate kidney function in a wide range of circumstances, to help diagnose kidney disease, and to monitor people with acute or chronic kidney dysfunction or failure. Higher BUN levels are detected when the kidney or liver is damaged.

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