hand-arm-vibration syndrome

hand-arm-vi·bra·tion syn·drome

(HAVS) (hand ahrm vī-brāshŭn sindrōm)
Disorder resulting from the use of hand-held vibration tools (e.g., pneumatic drills, electric polishers, gas-powered chainsaws). Symptoms consist of: a circulatory disturbance, specifically vasospasm with finger blanching (i.e., secondary Raynaud phenomenon); sensorineural changes (numbness and decreased sensitivity), principally limited to the fingers; and various skeletal abnormalities affecting the hand and forearm; may be unilateral or bilateral; initially episodic and triggered by cold exposure, but may ultimately progress and become constant; often carpal tunnel syndrome is associated.