Occupational medicine (Philadelphia, Pa.)
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Review Guideline
Pulmonary function testing: guidelines for medical surveillance and epidemiological studies.
This chapter emphasizes spirometry guidelines for conducting medical surveillance and epidemiological studies beyond those addressed by the 1987 American Thoracic Society Spirometry Update. These guidelines include specific recommendations concerning testing equipment, test performance, quality control, and technician training. Use of these guidelines should help ensure that changes in lung function over time and/or from certain exposures can be correctly interpreted and analyzed without reservation regarding their accuracy and quality.
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This chapter predicts future areas of concern for worksite health promotion programs. The shared responsibility of the employee and the organization in health promotion is stressed. The author also described the importance of recognizing the interrelationships among the personal domains of physical, emotional, mental, and spiritual health.
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Work hours affect sleep because the sleep behavior of people on nonworkdays differs from that on workdays. For most workers, workday sleep is shorter than nonworkday sleep. On nonworkdays most workers sleep at night. ⋯ Subjective measurements can be used for these assessments if care is taken to use appropriate methods. It is recommended that this data be collected by asking workers quite literal and concrete questions about the time of day they usually elect to go to sleep and get up. A sleep survey of this sort should gather main sleep period and napping times for both workdays and nonworkdays, so that the infradian sleep strategy of the worker can be identified.(ABSTRACT TRUNCATED AT 400 WORDS)
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The objective of this article is to provide the reader with a basic knowledge of the operation of heating, ventilation, and air-conditioning (HVAC) systems and to explain why many systems do not perform correctly. The flow of air through a typical HVAC system is described, and the correlation between system components and their potential to affect indoor air quality is addressed.