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Sodium
Test Code38465
CPT Codes
84295<br>Restricted Client Code
Preferred Specimen
1 mL serum collected in a serum separator tube (SST)
Minimum Volume
0.5 mL
Other Acceptable Specimens
Plasma collected in a sodium or lithium heparin (green-top) tube, or a plasma separator tube (PST)
Instructions
Centrifuge serum or plasma specimens within 1 hour of collection, transfer serum or plasma to sterile, plastic, screw-capped vial(s), and ship at room temperature.
Gastric Fluid is an unacceptable sample type for this test. Specimens with gross hemolysis are not acceptable
Gastric Fluid is an unacceptable sample type for this test. Specimens with gross hemolysis are not acceptable
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days
Refrigerated: 7 days
Frozen: 28 days
Methodology
Ion-Specific Electrode
Setup Schedule
Set up: Sun-Fri, Sat; Report available: Next day
Reference Range
135-146 mmol/L
Clinical Significance
Sodium measurements are useful in the diagnosis and treatment of aldosteronism, diabetes insipidus, adrenal hypertension, Addison's disease, dehydration, inappropriate antidiuretic hormone secretion, or other diseases involving electrolyte imbalance.
