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Carbon Dioxide (Bicarbonate)

What Affects the Test

Reasons you may not be able to have the test or why the results may not be helpful include the following:

  • You drink liquids that are very acidic, such as orange juice or some types of carbonated beverages, shortly before having the test.
  • You are taking some medicines, such as diuretics, some antibiotics, glaucoma medicine, and corticosteroids.
  • The health professional leaves on the elastic band that stops blood flow for an extended amount of time before the blood sample is collected.

What To Think About

  • The carbon dioxide (bicarbonate) test also can be done on a blood sample taken from an artery for an arterial blood gas (ABG) test. To learn more, see the topic Arterial Blood Gases.


  1. Fischbach FT, Dunning MB III, eds. (2009). Manual of Laboratory and Diagnostic Tests, 8th ed. Philadelphia: Lippincott Williams and Wilkins.

Other Works Consulted

  • Chernecky CC, Berger BJ (2008). Laboratory Tests and Diagnostic Procedures, 5th ed. St. Louis: Saunders.

  • Fischbach FT, Dunning MB III, eds. (2009). Manual of Laboratory and Diagnostic Tests, 8th ed. Philadelphia: Lippincott Williams and Wilkins.

  • Pagana KD, Pagana TJ (2010). Mosby’s Manual of Diagnostic and Laboratory Tests, 4th ed. St. Louis: Mosby Elsevier.

ByHealthwise Staff
Primary Medical ReviewerE. Gregory Thompson, MD - Internal Medicine
Specialist Medical ReviewerRobert L. Cowie, MB, FCP(SA), MD, MSc, MFOM - Pulmonology

Current as ofSeptember 9, 2014

1 | 2 | 3

WebMD Medical Reference from Healthwise

Last Updated: September 09, 2014
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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