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Sodium 24 HR Urine
Test CodeUNA24
Alias/See Also
NA, NA Urine, Sodium Urine, 24 hour urine
CPT Codes
84300, 81050
Includes
- Sodium Urine Random, UNA1
- Volume measurement, UVOL
- 24 hour calculation UNAC
- Time-Hours UHOUR
Preferred Specimen
URINE Timed (UTO)
Instructions
Patient instructions for 24 hour collection
Stress to the patient that for accurate test results on a 24 hour urine sample it is important for a complete and accurate collection be made.
Instruct patient to drink the same amount of liquid during the collection period that they normally consume, unless otherwise instructed by their physician. No alcoholic beverages should be consumed at this time.
Instructions to patient:
Stress to the patient that for accurate test results on a 24 hour urine sample it is important for a complete and accurate collection be made.
Instruct patient to drink the same amount of liquid during the collection period that they normally consume, unless otherwise instructed by their physician. No alcoholic beverages should be consumed at this time.
Instructions to patient:
- Select a convenient time for starting the collection. You must finish the collection at the same time 24 hours later.
- Empty your bladder and discard this urine. Note the date and time you did this.
- From this time on, collect ALL urine you pass during the day and night for the duration of the 24 hour period. Pour this urine into the container provided by the Laboratory.
- Keep the urine refrigerated or on ice throughout the collection process.
- At exactly 24hours from the start of collection (see time documented in #2), empty you bladder. Note the date and time:
- After collection is complete, bring the urine and instruction sheet to the Laboratory as soon as possible.
Specimen Stability
Urine: Random and 24 hour collections are the recommended specimens. Collect in non-acidified clean containers. Avoid any blood in the specimen which may falsely elevate potassium values.
Urine: Use fresh sample for analysis when possible. Store urine specimens at 2 - 8o C.
Urine: Use fresh sample for analysis when possible. Store urine specimens at 2 - 8o C.
Methodology
ISE Module
Setup Schedule
24x7
Reference Range
UNAC: Normal Range: 40-220 mmol/24 hours
Clinical Significance
Urine sodium levels are typically tested in patients who have abnormal blood sodium levels to help determine whether an imbalance is from, for example, taking in too much sodium or losing too much sodium. Urine sodium testing is also used to see if a person with high blood pressure is eating too much salt. It is often used in persons with abnormal kidney tests to help the doctor determine the cause of kidney damage, which can help guide treatment.
Performing Laboratory
CRMC Laboratory
