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Related Experiment Videos

Apnoeic diving safety--experimental approaches to oxygen augmentation.

P J Smit, A J Lessing, E S Steyn

    South African Medical Journal = Suid-Afrikaanse Tydskrif Vir Geneeskunde
    |March 24, 1984
    PubMed
    Summary

    Divers inhaling extra oxygen during ascent did not exhale it. The injected oxygen was absorbed into the blood, potentially preventing blackout but larger volumes pose risks.

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    Apnoeic diving black-out.

    South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde·1981

    Area of Science:

    • Physiology
    • Diving Medicine

    Background:

    • Apneic blackout is a risk for divers.
    • Oxygen augmentation is explored as a preventative measure.

    Purpose of the Study:

    • To determine if injected oxygen during ascent is exhaled.
    • To assess the fate of supplemental oxygen in divers.

    Main Methods:

    • Two experienced divers performed dives with and without supplemental oxygen.
    • Mouth and alveolar gas were analyzed post-dive.

    Main Results:

    • Injected oxygen was not detected in exhaled gas.
    • Supplemental oxygen disappeared from alveolar gas.
    • Increased oxygen transfer into the blood was observed.

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    Conclusions:

    • Inhaled supplemental oxygen is absorbed, not exhaled.
    • Oxygen augmentation may prevent blackout but large volumes are risky.