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Cardiovascular reflexes during vibration stress.

T Matoba1, T Ishitake

  • 1Department of Environmental Medicine, Kurume University School of Medicine, Japan.

The Kurume Medical Journal
|January 1, 1990
PubMed
Summary
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Vibration disease from hand-held tools causes nerve and circulatory issues, including Raynaud's phenomenon. Symptoms improve gradually after stopping tool use, with full recovery possible over several years.

Area of Science:

  • Occupational Health
  • Neurology
  • Vascular Medicine

Background:

  • Hand-held vibratory tools can cause vibration disease, a condition with diverse neurological and vascular symptoms.
  • Key symptoms include central, autonomic, and peripheral nervous system disorders, alongside Raynaud's phenomenon.

Purpose of the Study:

  • To elucidate the mechanisms underlying Raynaud's phenomenon in vibration disease.
  • To describe the neurological and vascular effects of prolonged exposure to hand-held vibratory tools.

Main Methods:

  • The study reviews existing literature on vibration disease mechanisms and clinical manifestations.
  • It proposes a mechanism for Raynaud's phenomenon involving direct vascular and nerve effects from vibration and cold.

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Main Results:

  • Vibration and cold exposure enhance vasoconstrictor release, contributing to Raynaud's phenomenon.
  • Work-related stressors (vibration, noise, cold, ergonomics, stress) disrupt central and autonomic nervous systems.
  • Autonomic nervous system dysfunction progresses from stimulation to suppression.
  • Vasospasms occur due to local injury and impaired autonomic control, exacerbated by cold exposure.

Conclusions:

  • Vibration disease involves complex interactions between local trauma, central nervous system dysfunction, and autonomic dysregulation.
  • The cardiovascular system shows adaptive capacity to vibration stress, but peripheral circulation is significantly impacted.
  • Adaptation to vibration stress resolves over 7-8 years after cessation of tool use.