UCSF Navigation Bar

UCSF Departments of Pathology & Laboratory Medicine Home Page

Lab Manual for UCSF Clinical Laboratories

Lab Manual for SFGH

Internal Resources

Click here for more information about laboratory operations and procedures

If you have additional questions regarding this test, please call: 415-353-1667

Search Our Test Menu

Sodium, whole blood (MtZ Only)

Item Value
Approval req'd? No
Available Stat? Yes
Test code NAWB
Test group Sodium
Performed by Mt. Zion Chemistry
In House Availability Test available 24 hours per day 7 days per week
Method Ion selective electrode (ISE)
NCPL Radiometer ABL 800
MtZ Gem Premier 3500
Collection Instructions Fill syringe completely, remove needle, expel all bubbles and cap sample.

Send samples send via pneumatic tube to NCPL (station #916) immediately for testing. DO NOT send on ice.
Container type ABG syringe containing 100U of dry heparin
Amount to Collect 3 mL blood
Sample type Heparinized whole blood (Blood gas syringe only)
Preferred volume 3 mL blood
Min. Volume 1 mL blood
UCSF Rejection Criteria Samples submitted > 30 min. after collection. Samples with needle attached, containing large bubbles, unlabeled, clotted or of insufficient volume
Units mmol/L
Normal range 136-146 mmol/L
Critical value < 125 mmol/L or > 155 mmol/L
Synonyms Na; Electrolytes
Turn around times Stat 15 min, Routine 30 min
Additional information A level < 110 mmol/L or > 170 mmol/L will automatically be re-assayed.

High levels of glucose can lower electrolyte concentrations, each 100 mg/dL causing an apparent decrease in serum sodium of 1.6 mmol/L Ref: Schrier RW: Manual of Nephrology, Boston, Little Brown, 1981
CPT coding 84295
LOINC code 2947-0
Last Updated 6/22/2016 13:02:09
Entry Number 861
UCSF home page UCSF home page About UCSF Search UCSF UCSF Medical Center