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This test measures the level of bicarbonate in your child's blood. Bicarbonate is a form of carbon dioxide (CO2). CO2 is a waste product of metabolism. The blood carries it to the lungs, where it is exhaled. Bicarbonate keeps your child's blood at the right pH level (not too acidic, and not too basic).
The test is also called a carbon dioxide test or a bicarbonate test.
CO2 testing is often done as part of a group of blood tests (chemistry screen). It's done to help find the cause of many kinds of symptoms. Some of these symptoms are vomiting, diarrhea, and dehydration. The causes include many kidney diseases, some lung diseases, and metabolic conditions like diabetes.
In general, there's nothing you have to do before this test, unless your doctor tells you to.
A health professional uses a needle to take a blood sample, usually from the arm.
The test will take a few minutes.
Follow-up care is a key part of your child's treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse advice line (811 in most provinces and territories) if your child is having problems. Ask your doctor when you can expect to have your child's test results.
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Current as of: June 17, 2021
Author: Healthwise Staff
Medical Review:John Pope MD - Pediatrics & Donald Sproule MDCM, CCFP - Family Medicine
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