Raynaud's phenomenon of occupational origin
Article Abstract:
Repeated vibration of the hands and arms caused by industrial pneumatic tools such as rock drills, gasoline-powered chain saws, and jackhammers, results in a characteristic pattern of nerve, blood vessel, and skeletal muscle disorders. Abnormalities include loss of skin sensations; pain and numbness or tingling, suggestive of nerve disease; cold-induced vasospasm, or the constriction of blood vessels upon exposure to cold, resembling Raynaud's phenomenon; and loss of forearm and hand strength. Raynaud's phenomenon is a blood vessel disorder characterized by constriction of blood vessels in the extremities upon exposure to cold or emotional stress. Raynaud's may be confused with other disorders resulting from nerve compression in the upper extremities, such as thoracic outlet syndrome, caused by compression of the blood vessels and nerves in the neck or armpit, and carpal tunnel syndrome, caused by pressure on the forearm median nerve. It was estimated that 1.2 million American are exposed to high-frequency vibrations, and as many as 89 percent may be clinically affected. In the United States, there have been few studies of vibration-induced disorders, and insufficient medical surveillance and tool redesign, although these disorders have been frequently misdiagnosed and inappropriately treated by surgery. It is estimated that in the 1990s, cumulative trauma injuries will exceed all other work-related injuries. (Consumer Summary produced by Reliance Medical Information, Inc.)
Publication Name: Archives of Internal Medicine
Subject: Health
ISSN: 0003-9926
Year: 1990
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Hiker's Highway
Article Abstract:
The Appalachian Trail crosses 14 states and is the grandfather of long hikes in the U.S. Photographs of the Amicalola Falls State Park in Georgia, Big Bald Summit in Tennessee, Harlem Valley in New York, Mount Washington, New Hampshire, and Upper Kennebec River in Maine are shown.
Publication Name: Life
Subject: General interest
ISSN: 0024-3019
Year: 1998
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Electric vehicles drive toward the future
Article Abstract:
Demand for electric vehicles (EVs) may mean good business for electric utilities. Other utilities expect new sources of revenues that can come from marketing, installing and maintaining battery chargers for the vehicles. However, EVs are not expected to be market ready at present.
Publication Name: Electrical World
Subject: Electronics and electrical industries
ISSN: 0013-4457
Year: 1998
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