A Carbon Dioxide (CO2) test measures the amount of carbon dioxide in your blood, primarily in the form of bicarbonate. This test helps evaluate your body’s acid-base (pH) balance and electrolyte status.
What This Test Measures
CO2 (Bicarbonate):
Most CO2 in blood exists as bicarbonate, which acts as a buffer to maintain proper blood pH. The lungs and kidneys work together to regulate CO2/bicarbonate levels.
Reference Range
Normal: 23-29 mEq/L
Who Should Consider This Test
• Evaluating acid-base disorders
• Monitoring respiratory conditions (COPD, asthma)
• Kidney disease assessment
• Those with prolonged vomiting or diarrhea
• Monitoring effects of certain medications
• Part of electrolyte panel or metabolic panel
Understanding Results
High CO2 (Metabolic Alkalosis):
• Prolonged vomiting
• Excessive antacid use
• Diuretic use
• Respiratory problems causing CO2 retention
Low CO2 (Metabolic Acidosis):
• Diabetic ketoacidosis
• Kidney disease
• Severe diarrhea
• Aspirin overdose
• Lactic acidosis
How It Works
1. Order your test online – no doctor visit required
2. Visit any Quest Diagnostics location nationwide
3. Simple blood draw takes approximately 5 minutes
4. Results delivered to your secure portal within 1-2 business days
Preparation
No fasting required.
Related Tests to Consider
• Electrolyte Panel – CO2 with sodium, potassium, chloride
• Comprehensive Metabolic Panel – Complete metabolic assessment
• Arterial Blood Gas – More detailed acid-base evaluation (requires arterial blood)
Why Choose Wittmer Rejuvenation Clinic
At $10.50, our CO2 test is affordably priced. We partner with Quest Diagnostics for reliable, CLIA-certified laboratory testing.
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