Hand-Arm Vibration Syndrome (HAVS) is a medical condition caused by prolonged exposure to hand-transmitted vibration, usually from the use of vibrating tools such as power drills, jackhammers, chainsaws, and grinders.
🔍 What is HAVS?
HAVS is a progressive disorder that affects the blood vessels, nerves, and joints in the hand, wrist, and arm. It is a recognized occupational disease, especially in industries such as construction, forestry, and manufacturing.
🧠 Causes
HAVS results from repetitive and extended exposure to vibration through tools and machinery. The risk increases with:
- Long-term use of vibrating equipment (over months or years)
- Cold working environments (exacerbates symptoms)
- Poor tool maintenance or incorrect use
⚠️ Symptoms
Symptoms can be vascular, neurological, or musculoskeletal, and they often appear gradually:
Vascular:
- Blanching (whitening) of fingers, especially in cold weather — called “vibration white finger”
- Poor circulation
- Cold sensitivity
Neurological:
- Tingling, numbness, or pain in fingers
- Reduced grip strength
- Loss of touch sensitivity or coordination
Musculoskeletal:
- Stiffness and aching in the hands and arms
- Decreased manual dexterity
🧪 Diagnosis
Diagnosis typically includes:
- Patient history (exposure to vibration tools)
- Symptom pattern and progression
- Tests for nerve conduction and circulation
- Cold provocation tests
🛑 Prevention
HAVS is preventable but not curable once damage is done. Key prevention strategies include:
- Limiting exposure: Rotate tasks, limit time using vibrating tools
- Using proper tools: Anti-vibration tools and gloves
- Maintenance: Keep tools in good working condition
- Training: Educate workers on risks and safe practices
- Monitoring: Regular health surveillance for early signs