Sodium
- Sample Type
- Standard
- Fasting
- No
- Unit
- mmol/L
Sodium is the primary extracellular cation and is essential for maintaining osmotic pressure, water distribution, and electrical signaling in nerves and muscles. In a Basic Kidney Profile, sodium levels reflect the balance between dietary intake, renal excretion, and total body water. Abnormalities often indicate issues with renal tubular function, hydration status, or hormonal regulation (specifically ADH and aldosterone).
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Why Context Matters
Sodium levels can be misleadingly low (pseudohyponatremia) if blood levels of lipids or proteins are extremely high. Furthermore, severe hyperglycemia can shift water out of cells, diluting sodium and requiring a 'corrected sodium' calculation.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Sodium:
Official Sources
- Sodium Blood Test: MedlinePlus Medical TestMedlinePlus
Research & Guidelines
- PubMed: Sodium Clinical GuidelinesNCBI / PubMed
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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