摘要
目的 探讨乡镇石棉加工人员接触石棉尘量与石棉肺发病的剂量 反应关系。方法 记录接尘工人的职业史、体检史 ,纤维计数浓度由质量浓度通过公式换算得到 ,累积接尘量由接触浓度与时间相乘所得 ,以寿命表法建立石棉尘质量浓度与纤维计数浓度的剂量患病概率直线回归方程式。结果 按 1%石棉肺患病率、工人 3 0年工作年限计算 ,预测石棉尘质量浓度与纤维计数浓度应低于 2 71mg/m3 与 1 93f/ml。
Objective To learn the dose response relationship of asbestosis prevalence in the workers of small towns chrysotile processing plants.Methods To collect the chrysotile dust concentration records of all workplaces and the prevalence of asbestosis during recent 37 years;the chrysotile fiber concentration could be gotten by calculation from the chrysotile dust concentration;the amount of accumulative exposure amount to chrysotile fibers might be calculated from exposure concentration multiplied with exposure time.The dose response relationship between chrysotile and fiber concentration and asbestosis prevalence was established by the method of life table.Results The maximum allowable dust concentration and fiber concentration of asbestos dust were predicted as 2 71mg/m 3 and 1 93 f/ml respectively,according to the presumption that the workers would work for 30 years and the prevalence of asbestosis would be controlled under 1%.Conclusion The present hygienic standard of asbestos dust(MAC)of our country is reasonable.
出处
《中国工业医学杂志》
CAS
北大核心
2001年第3期148-150,共3页
Chinese Journal of Industrial Medicine
关键词
石棉
接尘量
石棉肺
剂量-反应关系
Asbestos
Asbestos exposure amount
Asbestosis
Dose response relationship
