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Related Experiment Videos

Vibroacoustic disease: some forensic aspects.

N A Castelo Branco1, E Rodriguez, M Alves-Pereira

  • 1Occupational Medicine Research Center, Lisbon, Portugal.

Aviation, Space, and Environmental Medicine
|April 3, 1999
PubMed
Summary
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Vibroacoustic disease (VAD) from industrial noise causes significant disabilities, primarily neurological and malignant. Echocardiograms reveal characteristic changes, confirming VAD as a distinct occupational hazard requiring recognition.

Area of Science:

  • Occupational Medicine
  • Environmental Health
  • Cardiology

Background:

  • Vibroacoustic disease (VAD) is an environmental condition resulting from occupational exposure to high-amplitude, low-frequency noise (> or = 90 dB SPL, < or = 500 Hz).
  • VAD can lead to significant worker disabilities, necessitating clear industrial exposure standards and diagnostic protocols.
  • Distinguishing VAD from similar conditions is crucial for accurate diagnosis and compensation.

Purpose of the Study:

  • To review available information on Vibroacoustic disease (VAD).
  • To document the need for industrial exposure standards for large pressure amplitude and low frequency (LPALF) noise.
  • To establish diagnostic procedures for VAD.

Main Methods:

  • A review of medical files for 236 male Caucasian aircraft technicians diagnosed with VAD.

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  • Monitoring of VAD patients for at least 15 years.
  • Detailed study of the disorder's natural history, focusing on diagnostic criteria and disability outcomes.

    • Main Results:

    • 73% of 236 VAD cases resulted in disability after an average of 24 years of occupational exposure.
    • Primary disabilities included neurological (34%), malignant (11.9%), and psychiatric (9.7%).
    • Echocardiograms showed characteristic pericardial structural changes, confirmed by biopsy and autopsy.

    Conclusions:

    • Echocardiographic findings are pathognomonic for VAD, establishing it as a diagnostic tool.
    • Existing disability tables are inadequate as they do not recognize LPALF noise as an occupational hazard.
    • Recognition of LPALF noise as an industrial hazard is essential for VAD patients' compensation and care.