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HelpTest ID NAU Sodium, 24 Hour, Urine
Useful For
Assessing acid-base balance, water balance, water intoxication, and dehydration
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
UrineNecessary Information
24-Hour volume (in milliliters) is required.
Specimen Required
Supplies: Sarstedt 5 mL Aliquot Tube (T914)
Collection Container/Tube: 24-hour graduated urine container with no metal cap or glued insert
Submission Container/Tube: Plastic tube or a clean, plastic aliquot container with no metal cap or glued insert
Specimen Volume: 5 mL
Collection Instructions:
1. Collect urine for 24 hours.
2. Refrigerate specimen within 4 hours of completion of 24-hour collection.
Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens for multiple collections.
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 14 days |
| Frozen | 30 days | |
| Ambient | 7 days |
Special Instructions
Reference Values
≥18 years: 22-328 mmol/24 hours
Reference values have not been established for patients who are less than 18 years of age.
CPT Code Information
84300
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Secondary ID
610734Day(s) Performed
Monday through Sunday