Uun12hurmrate

What is this test?

The 12-hour urine urea nitrogen test measures the amount of urea nitrogen that your kidneys excrete in urine over a 12-hour period. Urea is a waste product formed in your liver when protein is broken down. Your kidneys normally filter urea from the blood and excrete it in urine. This test helps doctors understand how well your kidneys are working and how your body is processing protein.

How is the test performed?

You will receive a special container from your healthcare provider. For 12 hours (usually overnight), you will collect all urine you produce in the container. It's important to collect every drop during this time period for accurate results. The container should be kept refrigerated or in a cool place. After the 12-hour collection period is complete, return the container to your lab or healthcare provider as instructed.

How to prepare for the test

Your doctor may ask you to avoid certain foods, medications, or supplements before the test. You should continue your normal diet unless instructed otherwise. It's important to drink normal amounts of fluids unless told to do otherwise. Tell your doctor about all medications you are taking, as some can affect test results.

What do the results mean?

Normal values vary by lab, but generally range from 12 to 20 grams of urea nitrogen per 24 hours (the test measures half of this for a 12-hour period). Higher than normal levels may indicate kidney problems, high protein intake, or certain conditions. Lower than normal levels may indicate kidney disease, liver disease, or low protein intake. Your doctor will interpret your results based on your overall health and other test results.