24 hour Sodium Urine Test
24 hour Sodium Urine Test (Labcorp)
This test measures sodium levels in a 24-hour urine sample. Sodium is an important electrolyte which contributes to a number of healthy bodily functions. The kidneys are responsible for eliminating excess sodium from the body. When sodium levels are too high it can be an indicator of Kidney failure. Other issues such as dehydration, diarrhea, recent vomiting, an underactive thyroid, heart failure, and cirrhosis can cause abnormally high or low sodium levels. Measuring sodium in a 24-hour sample can be more useful than a single random collection since it looks at the total amount secreted over the course of a day.
A urine sodium test is often ordered as a followup to irregular results on a Sodium Blood Test.
Turnaround for this test is typically 1-3 business days.
Where can I find a Sodium 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.