| Arterial blood gases during diving in elite apnea divers. | |
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MedLine Citation:
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PMID: 12669255 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Elite apnea divers have considerably extended the limits of dive depth and duration but the mechanisms allowing humans to tolerate the compression- and decompression-induced changes in alveolar gas partial pressures are still not fully understood. Therefore we measured arterial blood gas tensions and acid-base-status in two elite apnea divers during simulated wet dives lasting 3 : 55 and 5 : 05 minutes, respectively. Arterial pO2 followed the compression-(from 13.8/16.9 kPa before the dive to 30 kPa at the start of the bottom time) and decompression-induced (from 13.7/21.0 kPa to 3.3/4.9 kPa immediately after surfacing) variations of ambient pressure, while the arterial pCO2 remained within the physiologic range (3.0/3.9 kPa before diving vs. 5.7/5.9 kPa at the end of the bottom time), probably due to the CO2 storage capacity of the blood. These findings may help to explain why humans can sustain deep and long apnea dives without major increases in respiratory drive. |
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Authors:
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C M Muth; P Radermacher; A Pittner; J Steinacker; R Schabana; S Hamich; K Paulat; E Calzia |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: International journal of sports medicine Volume: 24 ISSN: 0172-4622 ISO Abbreviation: Int J Sports Med Publication Date: 2003 Feb |
Date Detail:
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Created Date: 2003-04-01 Completed Date: 2003-07-28 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8008349 Medline TA: Int J Sports Med Country: Germany |
Other Details:
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Languages: eng Pagination: 104-7 Citation Subset: IM |
Affiliation:
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Division of Pathophysiology and Process Development in Anaesthesia, Department of Anaesthesiology, University Medical School Ulm, Parkstrasse 11, 89073 Ulm, Germany. claus-martin.muth@medizin.uni-ulm.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acid-Base Equilibrium
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physiology Adult Blood Gas Analysis Carbon Dioxide / blood* Diving / physiology* Humans Oxygen / blood* Partial Pressure Pulmonary Gas Exchange Vital Capacity |
| Chemical | |
Reg. No./Substance:
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124-38-9/Carbon Dioxide; 7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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