Metabolic / Electrolytes
Also known as: CO2 blood test, Bicarbonate blood test, Total CO2
Seek urgent medical care if you experience severe shortness of breath, confusion, rapid heart rate, or extreme weakness, especially with abnormal CO2 results.
This test checks how much carbon dioxide is in your blood. Most of this carbon dioxide is in a form called bicarbonate. Bicarbonate helps your body keep a healthy balance between acids and bases.
Your doctor orders this test to check your body's electrolytes. This helps them see if your body is balancing these important chemicals well. It also helps your doctor find problems with your kidneys or lungs.
Reference ranges for CO2 can vary by laboratory, and interpretation may depend on your age, sex, pregnancy status, and overall health.
Clinical Reference
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Educational purposes only — This information is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your lab results with your healthcare provider.