from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A condition marked by an unusually high concentration of carbon dioxide in the blood as a result of hypoventilation.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. the condition of having an abnormally high concentration of carbon dioxide in the blood

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the physical condition of having the presence of an abnormally high level of carbon dioxide in the circulating blood


hyper- + Greek kapnos, smoke + -ia2.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From hyper- + -capnia. (Wiktionary)


  • Someone who says things like "Carbon Dioxide is harmless" when in fact, hypercapnia can kill people, is a dangerous person.

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  • High levels of CO2 can give rise to hypercapnia and respiratory acidosis, which can lead to unconsciousness and death if left untreated.

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  • You can experience hypercapnia when your blood cannot exchange CO2 by Oxygen at the respiratoty bronchial alveoles.

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  • Above 5% in the atmosphere will cause hypercapnia, above 7%-10% unconsciousness pretty quickly, at least according to the wiki.

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  • Well, hypercapnia means an increase in the frequency of inhalation-exhalation cycles motivated by scarcity of Oxygen in a given environment saturated by CO2.

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  • Some elements of risk may impact simultaneously upon the individual liability to panic and exaggerated sensitivity to hypercapnia.

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  • These patients must be treated to avoid or interhemispheric fissure may restrict the increased ICP to only reduce secondary lesion, due to hypoxemia, hypercapnia, one side of the brain, at least, in the beginning; sometimes, the hypocapnia, etc.

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  • Respiratory depression occurs more frequently in elderly or debilitated patients and in those suffering from conditions accompanied by hypoxia, hypercapnia, or upper airway obstruction, in whom even moderate therapeutic doses may significantly decrease pulmonary ventilation. Featured News and Stories

  • Be especially cautious if you have chronic obstructive pulmonary disease or a condition that reduces oxygen to the tissues (hypoxia) or causes an excess of carbon dioxide in the blood (hypercapnia).


  • Like other drugs with mu-opioid agonist activity, NUCYNTA (TM) is contraindicated in patients with significant respiratory depression, acute or severe bronchial asthma or hypercapnia in unmonitored settings or in the absence of resuscitative equipment.

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