Raynaud's phenomenon in different groups of workers using hand-held vibrating tools

Area of Science:

• Occupational Health
• Ergonomics
• Vibration Science

Background:

• Vibration-induced white fingers (VWF) pose a risk to workers using vibrating tools.
• The ISO 5349-1986 standard provides a dose-effect relationship for VWF prevention.
• Assessing VWF risk in different occupational groups is crucial for targeted prevention strategies.

Purpose of the Study:

• To evaluate the predictive accuracy of the ISO 5349-1986 standard for VWF risk in three distinct occupational groups.
• To compare the incidence of VWF symptoms among chippers, rammers, and grinders exposed to similar industrial processes.
• To investigate the influence of tool usage and energy absorption on VWF development.

Main Methods:

• A cross-sectional study involving 102 male foundry workers (22 chippers, 42 rammers, 38 grinders).
• Measurement of frequency-weighted acceleration magnitudes for pneumatic rammers, chipping hammers, and grinders.
• Medical examinations to assess vascular disorders, specifically blanching symptoms indicative of VWF.

Main Results:

• The ISO 5349-1986 standard accurately predicted VWF risk only for the chipper group.
• Chippers reported a significantly higher incidence of blanching symptoms (36%) compared to rammers (5%) and grinders (3%).
• Mean acceleration magnitudes were highest for rammers (25.3 ms⁻²), followed by chippers (8.4 ms⁻²), and grinders (3.8 ms⁻²).

Conclusions:

• The ISO 5349-1986 standard's predictive capability for VWF is group-dependent.
• Differences in VWF incidence may be attributed to variations in tool handling and energy absorption by operators.
• Further research into tool-specific usage patterns and their impact on hand-arm vibration exposure is warranted.