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Reference.org
Breath carbon monoxide
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<p>Breath carbon monoxide is the level of <a href="/facts/Carbon_monoxide/CKuLtEMJ">carbon monoxide</a> in a person's exhalation. It can be measured in a breath carbon monoxide test, generally by using a carbon monoxide breath monitor (breath CO monitor), such as for motivation and education for <a href="/facts/Smoking_cessation/DDddp1SQ">smoking cessation</a> and also as a clinical aid in assessing <a href="/facts/Carbon_monoxide_poisoning/UyjKzy4W">carbon monoxide poisoning</a>. The breath carbon monoxide level has been shown to have a close relationship with the level of CO in the blood known as <a href="/facts/Carboxyhemoglobin/pzv2kCQe">carboxyhaemoglobin</a> (%COHb) or "blood CO". This correlation allows for the level of CO in the blood to be indirectly measured through a breath sample. </p>