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Test Code 2775 Sodium, Blood

Performing Laboratory

Barnes-Jewish Hospital Laboratory


Direct Ion-Selective Electrode (ISE)

Literature Reference:

Reference manual: ABL 800 FLEX Series. Radiometer America, Bronshoj Denmark, 2009.

Specimen Requirements

Specimen Type: Whole blood

Container/Tube: Sims-Portex blood gas syringe

Specimen Volume: Full tube


Collection Instructions: Send capped syringe (no needle attached) to the laboratory.

Day(s) Test Set Up

Monday through Sunday

Turnaround Time:
STAT: 15 minutes after receipt in laboratory
Routine: not available

Reference Values

135-145 mmol/L
Critical result (automatic call-back): ≤120 mmol/L or ≥160 mmol/L

Literature Reference:

Scott MG, Klutts JS, et al. Physiology and disorders of water electrolyte, and acid-base metabolism. In: Tietz textbook of clinical chemistry. 4th ed. Elsevier Saunders Co., 2005;1747-76.

Test Classification and CPT Coding


Additional Information

For BJH Laboratory Use Only

Analyte Stability:

Not established, performed upon receipt.

Laboratory Processing Instructions:

Test performed in BJH Core Lab. Deliver to blood gas workstation immediately.

Specimen Transport Temperature


LOINC Code Information

Name LOINC Code
Sodium 2947-0