为了解支气管内煤尘沉着与煤工尘肺诊断之间的关系，我们自1993年开始着手对有煤尘接触史及确诊为I、I、皿期的尘肺病人进行了纤支镜检查。从5年内纤支镜检查的530例患者中，选出年龄在40岁以上，一直从事井下开采作业，且尚未诊断为尘肺的53人，作为对照组。将所有诊断为尘肺 To understand the relationship between the bronchial deposits in the bronchi and the diagnosis of pneumoconiosis in coal workers, we conducted a fiberoptic examination of the pneumoconiosis patients who had a history of exposure to dust and had been diagnosed as I, I, and III since 1993. Of the 530 patients undergoing bronchoscopy in 5 years, 53 were selected as control group, of whom 53 were over 40 years of age who had been engaged in downhole operations and had not yet been diagnosed as pneumoconiosis. All diagnosed as pneumoconiosis