Heat Stress Associated With the Use of Vapor-Barrier Garments

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Abstract
Use of personal protective devices in the workplace, while intended to diminish risk of injury, may in some cases increase personal risk from environmental hazards. A case of a juvenile diabetic with complaints of near syncope while working in a plastics laminating process is analyzed. Although his symptoms might be attributed to a variety of causes, they were traced to the effects of heat stress related to wearing vapor-barrier disposable coveralls in a warm environment (85.degree. F). A field study of asbestos workers involved in abatement of asbestos steam pipe insulation illustrates how clothing impermeable to sweat may result in elevation of core body temperature. When workers use vapor-barrier coveralls, work practices or wet bulb globe temperature limits may need to be revised to prevent heat-related injury.