A carbon dioxide (CO2) blood test measures the amount of carbon dioxide in your blood. Carbon dioxide is an odorless, colorless gas. It is a waste product from metabolism, the process your body uses to make energy from food you eat.
A CO2 blood test is often part of a group of tests called an electrolyte panel, which may be part of a routine checkup. The test may also help diagnose or monitor conditions related to an electrolyte imbalance. These may include high blood pressure and diseases of the kidneys, lungs, or liver.
Source: MedlinePlus, U.S. National Library of Medicine
Normal range
No published reference range from a named lab yet.
What an abnormal result can be associated with
- A high result
- Hypercapnia
- A low result
- Hypocapnia
Associations from LOINC2HPO (Human Phenotype Ontology). This is reference information, not a diagnosis — only a clinician can interpret your result in context.
Details
- Sample
- Serum or plasma · LOINC
- Listed under
- Fluid and Electrolyte Balance
- Code
- LOINC 2028-9 · mmol/L
- Also known as
- Carbon dioxide, total, Carbonic anhydride, CO2, Carbon dioxide, bicarbonate