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PVC 제조공장 근로자의 염화비닐 폭로수준 추정 방법 및 건강진단 시행방법 개발에 관한 연구
김 헌,남윤정,김승택,김대영,한설희,박국태 大韓産業醫學會 1994 대한직업환경의학회지 Vol.6 No.2
In order to develop questionnaire estimating vinyl chloride monomer(VCM) exposure levels, to reset selection criteria for detailed tests, to measure current VCM exposure levels, to evaluate the mutagenic effects of VCM exposures and to develop multiphasic screening method of PVC- or VCM-handing workers, VCM concentrations of work environments were measured and tentaive self-administrative questionaire, physical examination, sister chromatid exchange(SCE) test and some clinical chemical test were applied to 195 men who had been working in factories producing or handing VCM or PVC(Exposed Group) and 37, in the same factories without exposure to VCM or in polyethylene- or polypropylene-related factories(Control Group). Mean VCM concentrations of work environments were 0.268 ±0.183 ppm under PVC synthesis processes, 0.160±0.200 ppm under VCM synthesis processes, 0.076±0.111 ppm under PVC pipe producing processes, 0.090±0.108 ppm under PVC wall paper, sheet, or film producing processes, 0.071±0.051 ppm under PVC floor producing processes, 0.243±0.250 ppm under PVC sash producing processes, and 0.020±0.031 ppm under triming process. VCM levels of work environments under manual resin mixing processes(0.209±0.168 ppm) were higher than those of the others (0.209±0.168 ppm)(p-value<0.05). There was no VCM-related symptoms, the positive response rates of which were higher in the Exposed Group. Overall abnormal rate in clinical chemistry test of the Exposed Group was higher than that of the Control Group, but due to extremely low exposure level of exposure group and to small sample size of the Control Group, no statistical significance was found(p-value>0.05). SCE frequencies of the Exposed Group were significantly higher than those of the Control Group(p-value>0.05) and those of test-abnormal persons were higher than those of test-normal persons. SCE frequencies linearly increased with not only current but also cumulative VCM exposure levels(p-value>0.05). These results suggest that adverse health effect may ensue from VCM exposure to as low as 1 ppm. But SCE frequencies had no statistically correlation with drinking amounts, smoking amounts or radiation dose equivalents. Questinnaire was revised to these results and fomula estimating cumulative VCM exposure levels based on occupational history in questionnaire were made. In addition, were presented methods evaluting work environments and multiphasic screening test for PVC workers.