Metabolic
Sodium
Sodium is the primary extracellular electrolyte, essential for fluid balance, nerve impulse transmission, and muscle contraction. Blood sodium is tightly regulated by the kidneys and ADH (antidiuretic hormone).
High sodium (hypernatremia) usually indicates dehydration. Low sodium (hyponatremia) can result from overhydration, SIADH, heart failure, or certain medications.
What It Measures
Serum sodium concentration.
Reference Ranges
| Status | Range (mEq/L) |
|---|---|
| Optimal | 137–142 mEq/L |
| Normal | 136–145 mEq/L |
| Borderline | 133–136 mEq/L |
| Out of Range | < 133 mEq/L or > 148 mEq/L |
How GATOR Tracks This
Lab Providers
Function HealthLabCorpQuest
Related Biomarkers
This content is for informational purposes only and does not constitute medical advice. Reference ranges may vary by laboratory and individual factors. Consult a qualified healthcare provider for interpretation of your results and treatment decisions.
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