Test Code NAS Sodium, Serum
Reporting Name
Sodium, SUseful For
Assessing acid-base balance, water balance, water intoxication, and dehydration
Method Name
Potentiometric, Indirect Ion-Selective Electrode
Performing Laboratory

Specimen Type
SerumNecessary 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.
Reject Due To
Gross hemolysis | Reject |
Gross lipemia | OK |
Specimen Minimum Volume
0.25 mL
Specimen Stability Information
Specimen Type | Temperature | Time |
---|---|---|
Serum | Refrigerated (preferred) | 14 days |
Ambient | 14 days |
Reference Values
<1 year: not established
≥1 year: 135-145 mmol/L
Day(s) Performed
Monday through Sunday
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.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 |
Secondary ID
602353Report Available
Same day/1 to 2 daysForms
If not ordering electronically, complete, print, and send a Cardiovascular Test Request Form (T724) with the specimen.