[Hand-arm vibration syndrome in caisson miners]

Area of Science:

• Occupational Health
• Ergonomics
• Vibration Toxicology

Context:

• Caisson mining involves significant exposure to hand-transmitted vibration from tools like pneumatic hammers.
• Workers in this industry are at high risk for developing Hand-Arm Vibration Syndrome (HAVS).
• Previous research indicates a strong correlation between vibration exposure and upper extremity disorders.

Purpose:

• To assess the prevalence of Hand-Arm Vibration Syndrome (HAVS) in caisson miners.
• To identify the specific types and frequencies of physical impairments associated with occupational vibration exposure.
• To correlate vibration measurements with observed health effects in caisson miners.

Summary:

• A study of 43 caisson miners revealed that 90.7% presented with symptoms indicative of Hand-Arm Vibration Syndrome (HAVS).
• Vascular (54.8%), neurological (51.6%), and musculoskeletal (51.2%) systems were frequently affected, with Raynaud's phenomenon and tunnel syndromes being common.
• Excessive vibration levels, exceeding ISO 5349 standards by 2.5-3.5 times, were measured on pneumatic hammers.
• Degenerative changes in the cervical spine (79.1%) were also prevalent, potentially linked to high physical job demands.

Impact:

• Findings underscore the critical need for stringent occupational health monitoring and vibration control measures in caisson mining.
• Highlights the importance of including detailed locomotor system examinations in the regular screening of caisson miners.
• Emphasizes the significant health burden of HAVS and related musculoskeletal disorders in vibration-exposed workforces.