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HelpTest Code NAS Sodium, Serum
Necessary Information
Patient's age and sex are required.
Specimen Required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Instructions:
1. Serum gel tubes should be centrifuged within 2 hours of collection.
2. Red-top tubes should be centrifuged, and the serum aliquoted into a plastic vial within 2 hours of collection.
Useful For
Assessing acid-base balance, water balance, water intoxication, and dehydration
Reporting Name
Sodium, SSpecimen Type
SerumSpecimen Minimum Volume
0.25 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 14 days | |
| Ambient | 14 days |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | OK |
Reference Values
<1 year: not established
≥1 year: 135-145 mmol/L
Day(s) Performed
Monday through Sunday
Report Available
Same day/1 to 2 daysSpecimen Retention Time
1 weekPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
84295
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| NAS | Sodium, S | 2951-2 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| NAS | Sodium, S | 2951-2 |
Forms
If not ordering electronically, complete, print, and send a Cardiovascular Test Request Form (T724) with the specimen.