Metabolic
Carbon Dioxide (CO2/Bicarbonate)
The CO2 on a metabolic panel measures bicarbonate (HCO3-), the body primary acid-base buffer. Low CO2 suggests metabolic acidosis (diabetic ketoacidosis, kidney disease, diarrhea). High CO2 suggests metabolic alkalosis (vomiting, diuretic use).
This is not the same as arterial CO2 (pCO2) measured in blood gases.
What It Measures
Serum bicarbonate concentration (total CO2).
Reference Ranges
| Status | Range (mEq/L) |
|---|---|
| Optimal | 23–27 mEq/L |
| Normal | 23–29 mEq/L |
| Borderline | 20–23 mEq/L |
| Out of Range | < 20 or > 32 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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