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尘肺是在生产过程中长期吸入粉尘并在肺内潴留引起的以肺组织持续慢性炎症、进行性纤维化为主的全身性疾病,尘肺又以矽肺最为严重。尘肺在我国属于法定职业病,受危害人群数量庞大,截至2005年,全国尘肺病累积病例607570例,现存活病例470089例,而且每年仍有不少新增病例[1-2]。尘肺一经发生,则慢性炎症和纤维化持续存在,即使停止粉尘暴露,肺部病变依然进展,导致肺功能障碍乃至呼吸衰竭。尘肺病给劳动者的健康带来了巨大危害,给社会造成了沉重的经
Pneumoconiosis is a systemic disease characterized by long-term inhalation of dust and retention in the lung with persistent chronic inflammation of the lung tissue and progressive fibrosis in the production process. Pneumoconiosis is the most serious in silicosis. Pneumoconiosis is a statutory occupational disease in our country. The number of people at risk is huge. By 2005, there were 607,570 pneumoconiosis cases in the country and 470089 surviving cases. There are still many new cases every year [1-2]. Once pneumoconiosis occurs, chronic inflammation and fibrosis persist, and lung disease continues to develop even with cessation of dust exposure, leading to pulmonary dysfunction and even respiratory failure. Pneumoconiosis has brought enormous harm to the health of workers and has caused heavy losses to the community