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对接锰工1314人,同厂矿其他工种285人及对照组363人进行体检及锰中毒和锰矿工人尘肺情况调查;测定了接锰工313人、其他工种78人及对照组53人的发锰并调查了劳动条件。结果空气锰含量为0.05～2.15mg/m~3,粉尘浓度为0.19～8.4mg/m~3。接锰组的症状体征明显高于其他两组(P<0.01及P<0.05)。心电图异常率接锰组、其他工种组及对照组分别为27.7％,17.19％及11.29％,前组明显高于后二组(均为P<0.01),高血压发生率前二组均高于对照组(P<0.01)。发锰均值各组分别为0.3262μmol/g,0.2519μmol/g及0.0766μmol/g,前二组均高于对照组(P<0.05)。发锰与空气锰含量间及与粉尘浓度间无相关,相关系数分别为r=0.629及r=-0.377,认为发锰可作为锰接触指标而不能作为锰中毒轻重的标准。并且锰中毒与锰矿工人尘肺并不平行。
Manganese workers were interviewed with 1314 workers, 285 workers with other types of workers and workers and 363 control workers. Manganese poisoning and manganese miners’ pneumoconiosis were investigated. Totally 313 manganese workers, 78 other workers and 53 control workers were enrolled. Investigated working conditions. Results The air manganese content was 0.05 ~ 2.15mg / m ~ 3, the dust concentration was 0.19 ~ 8.4mg / m ~ 3. Symptoms and signs of manganese group were significantly higher than the other two groups (P <0.01 and P <0.05). Electrocardiogram abnormal rate of access to the manganese group, other types of work and control group were 27.7%, 17.19% and 11.29%, the former group was significantly higher than the latter two groups (both P <0.01), the incidence of hypertension were significantly higher than the first two groups Control group (P <0.01). The mean values of hair and manganese in each group were 0.3262μmol / g, 0.2519μmol / g and 0.0766μmol / g respectively, the former two groups were higher than the control group (P <0.05). There was no correlation between hair manganese and air manganese content and dust concentration, the correlation coefficient was r = 0.629 and r = -0.377, respectively. It was considered that manganese could be used as the indicator of manganese exposure and could not be used as the standard of manganese poisoning. And manganese poisoning and manganese workers pneumoconiosis is not parallel.