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Related Experiment Videos

Does cold water truly promote diver's ear?

M Ito1, M Ikeda

  • 1First Department of Anatomy, National Defense Medical College, Tokorozawa, Japan.

Undersea & Hyperbaric Medicine : Journal of the Undersea and Hyperbaric Medical Society, Inc
|May 5, 1998
PubMed
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Cold water exposure significantly increases the incidence and severity of diver's ear (exostosis of the external auditory canal) in Japanese military divers. This condition worsened with longer diving careers in colder regions.

Area of Science:

  • Otolaryngology
  • Environmental Health
  • Occupational Medicine

Background:

  • Diver's ear, or exostosis of the external auditory canal, is a common condition among individuals with frequent water exposure.
  • Previous research suggests a link between water temperature and the development of exostosis, but further investigation is warranted.

Purpose of the Study:

  • To investigate the incidence and severity of diver's ear in Japanese military divers.
  • To determine the correlation between water temperature, diving career duration, and the prevalence of exostosis.

Main Methods:

  • A comparative study was conducted on 97 Japanese military divers from Mutsu (cold water) and Yokosuka (warm water).
  • Data collected included diving career length and the presence and severity of external auditory canal exostosis.

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  • Statistical analysis was performed to compare exostosis incidence between the two groups and across different diving career lengths.

    • Main Results:

    • The incidence of exostosis was significantly higher in the Mutsu (cold water) group compared to the Yokosuka (warm water) group.
    • In the cold water group, exostosis incidence significantly increased with longer diving careers, a trend not observed in the warm water group.
    • Exostosis severity increased in divers from both districts, with a higher proportion of grade 2 exostosis in the Mutsu group.

    Conclusions:

    • Cold water exposure appears to facilitate the formation and progression of external auditory canal exostosis.
    • Military divers operating in colder environments may be at higher risk for developing more severe cases of diver's ear.
    • Findings support the hypothesis linking cold water immersion to increased risk of exostosis.