Document Detail


Arterial blood gases during diving in elite apnea divers.
MedLine Citation:
PMID:  12669255     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
C M Muth; P Radermacher; A Pittner; J Steinacker; R Schabana; S Hamich; K Paulat; E Calzia
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of sports medicine     Volume:  24     ISSN:  0172-4622     ISO Abbreviation:  Int J Sports Med     Publication Date:  2003 Feb 
Date Detail:
Created Date:  2003-04-01     Completed Date:  2003-07-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8008349     Medline TA:  Int J Sports Med     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  104-7     Citation Subset:  IM    
Affiliation:
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
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MeSH Terms
Descriptor/Qualifier:
Acid-Base Equilibrium / physiology
Adult
Blood Gas Analysis
Carbon Dioxide / blood*
Diving / physiology*
Humans
Oxygen / blood*
Partial Pressure
Pulmonary Gas Exchange
Vital Capacity
Chemical
Reg. No./Substance:
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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