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| Title: | Alveolar Pco2 during rest and exercise in divers and non-divers breathing O2 at 1 ATA |
| Authors: | Kerem, D
Melamed, Y
Moran, A |
| Keywords: | human |
| Issue Date: | 1980 |
| Abstract: | The extent of hypercapnia in oxygen-breathing subjects was investigated during rest and exercise (650 kpm/min). Divers, ex-divers, and non-divers were studied. Carbon dioxide retention was judged by end-tidal Pco2 values achieved after a few minutes at each state. End-breath-hold (EBH) PAco2 was also measured in the two states to assess the contribution of breathing pattern to CO2 retention. Findings indicated a pronounced hypoventilation and hypercapnia in the divers during exercise, and a mean exercise EBH PAco2 value 15 mmHg greater than that in non-divers. Ex-divers had group mean values not significantly different from those of active divers. Superimposed inspired CO2 load caused similar elevations in PAco2 values in divers and non-divers. We concluded that CO2 retention in exercising oxygen-breathing divers cannot be accounted for solely as a conditioned breathing behavior, may be due partly to a reduced central responsiveness of CO2, and is not dependent on current diving activity. Adolescent Adult Carbon Dioxide/blood *Diving Exertion Human Hypercapnia/*etiology Hypoventilation/etiology Male *Oxygen Consumption Partial Pressure |
| Description: | Undersea and Hyperbaric Medical Society, Inc. (http://www.uhms.org ) |
| URI: | PMID: 6770529
http://archive.rubicon-foundation.org/2876 |
| Appears in Collections: | Undersea Biomedical Research Journal
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| 6770529.pdf | 1439Kb | Adobe PDF | View/Open |
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