Test Overview Carbon dioxide (CO2) is a gaseous waste product from metabolism
This test measures the level of bicarbonate in a sample of blood from a vein. Bicarbonate is a chemical that acts as a buffer. It keeps the pH
Bicarbonate is not usually tested by itself. The test may be done on a blood sample taken from a vein as part of a panel of tests that looks at other electrolytes arterial blood gas (ABG)
Why It Is Done
CO2 testing may be done as part of a group of blood tests (chemistry screen) to help find the cause of many kinds of symptoms, including many kidney diseases, some lung diseases, and metabolic conditions.
How To Prepare
In general, there's nothing you have to do before this test, unless your doctor tells you to.
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How It Is Done
A health professional uses a needle to take a blood sample, usually from the arm. How long the test takes The test will take a few minutes.
How It Feels
When a blood sample is taken, you may feel nothing at all from the needle. Or you might feel a quick sting or pinch.
Risks
There is very little chance of having a problem from this test. When a blood sample is taken, a small bruise may form at the site.
Results
Each lab has a different range for what's normal. Your lab report should show the range that your lab uses for each test. The normal range is just a guide. Your doctor will also look at your results based on your age, health, and other factors. A value that isn't in the normal range may still be normal for you.
High values A high level may be caused by:
Severe vomiting or diarrhea. Starvation. Overuse of medicines that contain bicarbonate (especially antacids). Lung, liver, or thyroid disease. Low values A low level may be caused by:
Hyperventilation Aspirin or alcohol overdose. Severe diarrhea, dehydration, or malnutrition. Liver or kidney disease. Uncontrolled diabetes Related Information
Credits
Current as of: April 30, 2024
