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Related Experiment Videos

Balance testing in saturation diving

S H Nordahl1, T Aasen, O I Molvaer

  • 1Department of Otolaryngology/Head and Neck Surgery, Haukeland University Hospital, Bergen, Norway.

Aviation, Space, and Environmental Medicine
|November 1, 1995
PubMed
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Deep heliox diving significantly impairs postural control and vestibular function. These effects were measurable using computerized stabilometry and resolved after surfacing, indicating diving

Area of Science:

  • Hyperbaric physiology
  • Neuroscience
  • Human physiology

Background:

  • Limited research exists on hyperbaric exposure's effects on balance and the vestibular system.
  • Deep heliox diving presents unique physiological challenges.
  • Understanding these impacts is crucial for diver safety and performance.

Purpose of the Study:

  • To investigate the influence of deep heliox diving on postural control.
  • To assess changes in vestibular system function following saturation diving.
  • To evaluate the efficacy of computerized stabilometry in monitoring these changes.

Main Methods:

  • Four divers underwent a 32-day experimental saturation heliox dive.
  • Postural control was measured using a static balance platform at various depths (up to 470 msw).

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  • Vestibular function was assessed via otoneurological examination and electronystagmography (ENG) before and after the dive.

    • Main Results:

    • Postural control significantly decreased from approximately 200 msw, with increased body sway.
    • Vestibular caloric responses were reduced immediately post-dive.
    • All measured parameters returned to pre-dive levels after surfacing.

    Conclusions:

    • Deep heliox diving demonstrably affects both postural control and vestibular function.
    • Computerized stabilometry, particularly center of pressure (COP) path length, is a sensitive tool for monitoring divers.
    • These findings highlight the physiological impact of extreme diving environments.