Urea Nitrogen 24-Hour Urine Test
Test Code: 003541
Specimen Type: Urine
Urea Nitrogen 24-Hour Urine Test (Labcorp)
This test measures the level of Urea Nitrogen in a 24-hour urine sample. Urea is a waste product formed from various elements including nitrogen that is created as the body breaks down proteins from the food we eat. Urea is normally filtered by the kidneys and excreted from the body in urine. Testing a person's urea levels can help to see if they are getting too much or too little protein in their diets. It can also help to assess if your kidneys are functioning properly. If kidney function is impaired, urea levels in the urine will be lower than normal and blood levels will be elevated. For this reason, a blood urea nitrogen (BUN) test is often done along with a urine test when kidney disease is suspected.
A Urea Nitrogen urine test may be ordered as a followup to test results that show irregular protein levels or indicate kidney failure. Testing can also be used to monitor treatment for kidney disease.
Turnaround for this test is typically 1-2 business days.
Where can I find a Urea Nitrogen test near me?
Check our lab finder to locate a collection site in your area.
Note: Result turn around times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.
For 24-hour urine specimen: Obtain a specimen container and instructions from the draw site. Void at 8 AM and discard the specimen. Then collect all urine including the final void at the end of the 24-hour collection period (ie, 8 AM the next morning) in the specimen container. Screw the lid on securely and return the container promptly to the draw site.
If this test is being ordered along with any other blood and/or urine medical testing, it is recommended you have the specimen(s) for your other tests collected at the same time you bring the 24-hour urine specimen to the draw site.