胸膜斑与石棉肺一样,都是由长期低浓度石棉暴露所致。然而有关胸膜斑与石棉曝露量的关系目前还不甚清楚。为此,作者进行了针对性的研究。以1983年到1986年间居住在石棉暴露地区及其周围的400例解剖病例为对象。其中一般疾病和恶性肿瘤各200例。取左下肺组织5克,用次氯酸钠溶解48小时,待完全溶解后,再用50%乙醇和等量的氯仿进行溶解,180×g离心5分钟,将离心管的下部分内容再经微孔滤膜过滤,在光学显微镜下(×200)测定石棉小体数量。石棉小体在500个以上者,对其胸 Pleural plaques, like asbestos lungs, are caused by prolonged exposure to low concentrations of asbestos. However, the relationship between pleural plaques and asbestos exposure is not yet clear. To this end, the author conducted a targeted study. In 1983 to 1986 living in asbestos-exposed areas and the surrounding area of ​​400 cases of anatomy as the object. One of 200 cases of common diseases and malignancies. Take the left lower lung tissue 5 grams, with sodium hypochlorite dissolved 48 hours until completely dissolved, then 50% ethanol and the same amount of chloroform for dissolution, 180 × g centrifuge for 5 minutes, the lower part of the centrifuge tube and then by microporous filter Membrane filtration, determination of asbestos bodies under a light microscope (× 200). Asbestos bodies in more than 500, the chest