Vibration White Finger Syndrome

A musculoskeletal disorder, in which vibrating hand-held tools—e.g., electric drills, jackhammers and grinders—evoke vasospasms that are virtually identical to Raynaud phenomenon; plethysmographic studies reveal temperature-sensitive changes in blood flow, even in the absence of symptoms; with time, these individuals develop pain and numbness of the upper extremities suggestive of cervical, ulnar and median nerve entrapment