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对华坪县14家乡镇煤矿442例男性井下作业工人接尘工龄与肺功能变化关系进行了调查分析。结果表明,不同尘龄的工人,肺通气功能部有不同程度的降低,随尘龄的递增,FVC、FEV_1递减,差异非常显著。肺功能异常检出率随尘龄递增而递增,差异也非常显著。接尘10年组、15年组FVC、FEV_1肺功能障碍非常明显,与O~+组比较没有明显差别,早于X线改变,是早期反映煤尘对肺部损害敏感、稳定的指标。
442 cases of underground miners working in 14 township coal mines in Huaping County were investigated. The results showed that workers with different dust ages had different degrees of decrease in the pulmonary ventilatory function. With the increase of the age of dust, the FVC and FEV_1 decreased gradually, the difference was very significant. The detection rate of abnormal pulmonary function increased with age, the difference is also very significant. In the 10-year-old group, 15-year FVC and FEV-1 lung dysfunction were very obvious. Compared with the O ~ + group, there was no significant difference, which was earlier than the change of the X-ray, which was an early indicator of the sensitivity and stability of coal dust to lung damage.