What is it used for?A CO2 blood test is often part of a series of tests called an electrolyte panel. Electrolytes help balance the levels of acids and bases in your body. Most of the carbon dioxide in your body is in the form of bicarbonate, which is a type of electrolyte. An electrolyte panel may part of a regular exam. The test may also help monitor or diagnose conditions related to an electrolyte imbalance. These include kidney diseases, lung diseases, and high blood pressure.
