职业性粉尘在肺内的沉积与排除和职业性肺疾患的发生与发展有密切的关系。本文研究了大鼠吸入煤尘和煤石尘后,粉尘从肺内清除的影响因素。 实验选用的煤尘和煤石尘的游离SiO_2含量分别为0.48％和9.14％。粉尘直径<6μm的占90％以上。实验用大鼠经动式染尘两周以后,分批处死,用甲酸 Occupational dust in the lung deposition and exclusion and occupational lung disease occurrence and development are closely related. In this paper, the inhalation of coal dust and coal dust in rats, dust removal factors from the lungs. The free SiO 2 content of coal dust and coal dust selected for the experiments were 0.48% and 9.14% respectively. Dust diameter <6μm accounted for more than 90%. Two weeks after the experimental rats were exposed to dust by motion, they were sacrificed in batches and formic acid was used