Explore this test
- Test Details
- Lab Values
- Clinical Significance
- Treatment Options
Sodium is an electrolyte present in all body fluids and is vital to normal body function, including nerve and muscle function. It helps cells function normally and helps regulate the amount of fluid in the body.
Ion Selective Electrode (ISE)
1.0 mL serum (0.5 mL minimum) collected in serum separator tube (SST/Tiger Top)
Refrigerated (ship on frozen cold packs)
Refrigerated: 14 days
- Low: <135 mmol/L
- Normal: 135-146 mmol/L
- High: >146 mmol/L
- Alert: ≤120 or ≥160 mmol/L
- May be used to detect the cause and help monitor treatment plan for patients with abnormal levels.
- Elevated levels of sodium could indicate hypernatremia or dehydration.
- Low levels could indicate hyponatremia, fluid retention or too much water intake.
Assess etiology of elevation such as dehydration, vomiting, medications, and kidney problems that may be results of abnormal electrolyte imbalance.