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| | Articles - Hypercapnia (Site not responding. Last check: 2007-11-04) |
 | | It may also be caused by exposure to environments containing abnormally high concentrations of CO (usually due to volcanic or geothermal causes), or by rebreathing exhaled carbon dioxide. |
 | | In closed circuit SCUBA (rebreather) diving, exhaled carbon dioxide must be removed from the breathing system, usually by a scrubber containing a solid chemical compound with a high affinity for CO If not removed from the system, it may be re-inhaled, causing an increase in the inhaled concentration. |
 | | The diver is exhaling into a vessel with inadequate ventilation, such as a long snorkel, full face diving mask, or diving helmet, and then re-inhaling from that vessel. |
| www.nowize.com /articles/Hypercapnia (346 words) |
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