| Training Improves Divers Ability to Detect Increased C02
Training Improves Divers Ability to Detect Increased C02.
From Aviation Space and Environmental Medicine Vol 74 No5 May 2003
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Abstract:
Eynan M, Daskalovic YI, Arieli Y, Arieli R, Shupak A, Eilender E, Kerem DH.
A total of 213 Navy divers were tested for CO2 retention and the ability to detect CO2 in novice divers who were either CO2-recognition-trained subjects (TS) or untrained subjects (UTS).
Results: The minimal mean inspired Pco2 that could be detected was 4.8 ± 1.6 kPa (36 ± 12 mm Hg) in UTS and 2.9 ± 0.7 kPa (22 ± 5 mm Hg) in TS (p < 0.0001).
There were 46 TS who were found to be CO2 retainers and 19 were classified as poor detectors.
Seven subjects exhibited both traits.
During actual oxygen diving performed later by this group, the only four cases of CNS-oxygen toxicity were among those seven subjects
Conclusions: that CO2 recognition training improves the diver’s capability to detect CO2. We suggest that a diver who is both a poor CO2 detector and a CO2 retainer will be prone to CNS-oxygen toxicity. |