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Physiological reactions during brush saw operation.

M Bovenzi1, A Peretti, A Zadini

  • 1Institute of Occupational Health, University of Trieste, Italy.

International Archives of Occupational and Environmental Health
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

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Handle holding, not vibration or noise, significantly impacts brush saw operators

Area of Science:

  • Occupational Health
  • Ergonomics
  • Biomedical Engineering

Background:

  • Brush saw operation poses risks to agricultural workers' hand-arm system.
  • Previous studies suggest vibration and noise are primary concerns.

Purpose of the Study:

  • To experimentally assess the physiological effects of brush saw operation on agricultural workers.
  • To differentiate the impacts of static load, noise, and vibration on sensorineural and muscular functions.

Main Methods:

  • Eight professional agricultural workers participated in field experiments.
  • Measurements included aesthesiometric thresholds, manipulative dexterity, pinch grip force, and fingertip skin temperature (FST).
  • Exposure involved varying combinations of static load, noise, and vibration for 5-15 minutes.

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Main Results:

  • No significant differences in peripheral circulatory, sensorineural, or muscular functions were observed under varied exposure conditions.
  • Static load (handle holding) was the primary factor affecting aesthesiometric thresholds, pinch grip force, and FST.
  • Manipulative skill remained unchanged compared to baseline measurements.

Conclusions:

  • Prolonged static overload on the hand-arm system, primarily from handle holding, is a key factor in musculoskeletal and sensorineural disorders.
  • Vibration exposure levels were consistent with a low risk of vibration-induced white finger.
  • Reduced gripping force is linked to the duration of brush saw operation.