摘要
本调查结果表明,木尘浓度在9.2～11.7mg/m^3时,木工的FvC、FEV_1、FEV_1/FVC和MMFR均明显下降,4.5mg/m^3时,仅FEV_1和MMFR显著下降,而FVC和MBC下降不明显。对木工肺功能损害与接触剂量关系分析结果表明,累计接触剂量为240mg·a时,木工一生按工作30年计算,接触浓度为8mg/m^3,在此浓度下工作,FEV_1、FEV_1/FVC与对照组此虽有降低,但差异不显著,只MMEF有显著性降低。结合我国当前经济条件和防尘技术的可行性,认为木尘(不包括致敏性木尘)最高容许浓度以8mg/m^3为宜。
Wood dust at the concentrations 9.2～11.7mg/m^3 could result in a fall in FVC, FEV_1, and FEV_1/FVC with statistical significance. At 4.5mg/m_3, the fall could only be found in FEV_1 and MMFR, but not in FVC and MBC. An accumulated exposure of 240rag. a corresponding to a calculated exposure level of 8mg/m^3 for a lifetime service of 30 years. Working at 8mg/m^3, the workers under study presented a significant fall only in MMEF, not in FEV_1 and FEV_1/FVC in comparison to that of the control. Considering the financial condition and the feasibility of the dust control technique of our country, a maximum allowable concentration of 8mg/m^3 for wood dust(excluding allergical wood dust) would be suggested.
出处
《职业医学》
CAS
1991年第3期163-166,共4页
China Occupational Medicine
关键词
木尘
肺功能
累计接触剂量
wood dust, lung lunction, accumulated exposure, maximum allowable concentration
