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Related Experiment Videos

Skin surface shock wave.

Nobuyuki Tanaka1, Makoto Kaneko

  • 1Graduate Sch. of Eng., Hiroshima Univ. tanaka@hfl.hiroshima-u.ac.jp

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|October 20, 2007
PubMed
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Skin surface shock waves, generated by air jets, show age-related differences. Young and elder subjects exhibit distinct recovery phases after impulsive force application, impacting biomechanical responses.

Area of Science:

  • Biomechanics
  • Dermatology
  • Biomedical Engineering

Background:

  • Impulsive forces applied to human skin generate a Skin Surface Shock Wave (SSSW).
  • Understanding SSSW dynamics is crucial for assessing skin's mechanical properties and response to impact.
  • Age-related changes in skin properties can influence SSSW generation and propagation.

Purpose of the Study:

  • To investigate the characteristics of the Skin Surface Shock Wave (SSSW) generated by an impulsive air jet force on human skin.
  • To compare the SSSW behavior between young and elder subjects.
  • To identify age-dependent differences in skin's dynamic response to mechanical impact.

Main Methods:

  • An impulsive force was applied to human skin using an air jet over 200 milliseconds.

Related Experiment Videos

  • The resulting Skin Surface Shock Wave (SSSW) was captured using high-speed imaging at 2000 Hz.
  • Quantitative analysis focused on the force application and recovery phases of the SSSW.

    • Main Results:

    • A significant difference in SSSW behavior was observed between young and elder subjects during the recovery phase.
    • Minimal age-related differences were found during the initial force-imparting phase.
    • Skin's viscoelastic properties appear to change with age, affecting shock wave dissipation.

    Conclusions:

    • Age significantly influences the recovery dynamics of the Skin Surface Shock Wave (SSSW) in human skin.
    • The initial response to impulsive force is less age-dependent than the subsequent dissipation.
    • These findings have implications for understanding age-related changes in skin biomechanics and injury risk.