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Carbon monoxide is an odorless, tasteless, and colorless gas that is found in combustion fumes. Inhaling too much carbon monoxide results in poisoning, which can be fatal.
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Carbon monoxide is easily absorbed through the lungs. Hemoglobin carries oxygen in the blood to the entire body. Carbon monoxide binds tightly with hemoglobin and takes the place of the oxygen. Tissue then becomes starved for oxygen. Brain tissue is very much at risk.
Faulty or improperly vented equipment causes a build up of carbon monoxide in semi- or enclosed spaces. Exposure can be the result of:
Carbon monoxide poisoning is more common in infants or older people. Other factors that may increase your risk of carbon monoxide poisoning include:
Symptoms related to carbon monoxide poisoning are usually vague. They can be split into acute and chronic symptoms.
You will be asked about your symptoms and medical history. A physical exam will be done. Questions may include:
Tests may include:
Move away from the source of the carbon monoxide. Breathe fresh air outdoors. Mild symptoms usually start to resolve after getting away from the gas.
Always seek medical care at the closest emergency room. Explain that you think you may have been exposed to carbon monoxide. The doctor will give you oxygen until your symptoms go away and carbon monoxide levels in your blood drop.
Other therapies may include:
Avoiding exposure to carbon monoxide is the key to preventing carbon monoxide poisoning. Since the gas has no odor or color, you will not know if it is present. The following suggestions can reduce your chance of exposure:
US Consumer Product Safety Commission
US Environmental Protection Agency
Public Health Agency of Canada
Indoor air quality. Environmental Protection Agency website. Available at: http://www.epa.gov/iaq/co.html. Accessed November 28, 2017.
Breimer LH, Mikhailidis DP. Could carbon monoxide and bilirubin be friends as well as foes of the body? Scand J Clin Lab Invest. 2010;70(1):1-5.
Carbon monoxide poisoning. Centers for Disease Control and Prevention website. Available at: https://www.cdc.gov/co/default.htm. Updated November 16, 2017. Accessed November 28, 2017.
Carbon monoxide toxicity. EBSCO DynaMed Plus website. Available at:http://www.dynamed.com/topics/dmp~AN~T115658/Carbon-monoxide-toxicity. Updated June 18, 2017. Accessed November 28, 2017.
Juurlink DN, Buckley NA, et al. Hyperbaric oxygen for carbon monoxide poisoning. Cochrane Database Syst Rev. 2005;(1):CD002041.
Weaver LK, Hopkins RO, et al. Hyperbaric oxygen for acute carbon monoxide poisoning. N Engl J Med. 2002; 347:1057-1067.
World Health Organization (WHO) Study Group on Tobacco Product Regulation. Waterpipe tobacco smoking: health effects, research needs and recommended actions by regulators. World Health Organization website. Available at: http://whqlibdoc.who.int/publications/2005/9241593857_eng.pdf. Accessed November 28, 2017.
Last reviewed November 2018 by EBSCO Medical Review Board James Cornell, MD Last Updated: 12/20/2014