Understanding Lab Tests for Hypercapnia
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Hypercapnia is a medical condition characterized by abnormally high levels of carbon dioxide (CO2) in the blood. This condition typically occurs when the lungs cannot effectively remove CO2 from the body, often due to respiratory disorders, lung disease, or inadequate breathing patterns.
Recommended Test
Carbon Dioxide
This blood test directly measures carbon dioxide levels in the bloodstream, which is the primary diagnostic marker for hypercapnia. Elevated CO2 levels in the blood confirm the presence of this condition, which typically results from inadequate respiration or impaired lung function that prevents proper CO2 elimination from the body.
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Diagnosing Hypercapnia Through Blood Testing
Blood tests are essential for diagnosing hypercapnia as they can directly measure the concentration of carbon dioxide in the bloodstream. Unlike conditions that rely on physical examination or imaging, hypercapnia requires laboratory analysis to accurately assess CO2 levels and confirm the diagnosis.
Understanding Your Results
Normal carbon dioxide levels in the blood typically range between 22-28 mEq/L. Elevated levels above this range may indicate hypercapnia and suggest that the body is retaining too much CO2, which can be caused by various respiratory conditions, medication effects, or metabolic disorders.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment. If you experience symptoms such as shortness of breath, confusion, or fatigue, seek immediate medical attention.
