A fact-finding survey on Occupational Cervicobrachial Disorder in an assembly plant is described. In this plant, amplifiers of stereophonic sound system were assembled on the conveyor lines. About 90 workwomen were engaged in the lines and majority of them repeatedly used the arms and hands with the posture being restrained to the lines. 25 workwomen aged 18-30 who complained of stiffness and pain over the shoulder and neck etc. were examined. And working conditions were analysed from the viewpoint of industrial health. Occupational Cervicobrachial Disorder had been considered to be peculiar to business machine operators. But as a result of this survey, it was made clear that Occupational Cervicobrachial Disorder was not peculiar to business machine operators and might develop in assembly plant workers in bad working conditions.
Fact-finding surveys of workers occupationally exposed to polychlorinated biphenyls (PCBs) in the production of silk thread or of paint were carried out. Some of the workers showed higher PCB levels in the plasma than typical yusho patients. Gas chromatographic patterns of their PCBs were shown to match the pattern of the PCBs to which they had been exposed. Levels of polychlorinated quaterphenyls in their blood were lower than 0.02 ppb. Medical findings were slight compared with typical yusho patients. From these results, the differences in contamination with PCBs and relevant compounds and in health status between these workers and yusho patients are discussed.
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