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目的：以肺通气功能测定，鉴定矽肺患者的致残程度。方法：对310例矽肺患者肺通气功能资料作分析。结果：随着矽肺期别增加肺通气功能指标（VC、FEV1、FEV1／FVC、MVV）明显下降， RV／TLC％增加，尤以Ⅲ期矽肺组更为明显．通气功能障碍以限制性和气道阻塞性的混合性损害为主。随着矽肺期别增加，通气功能异常率增高，肺气肿发生率增加。结论：肺通气功能可客观地评价矽肺患者劳动能力丧失的程度，在致残程度鉴定中占有重要地位，其中FEV1和RV／TLC％两项指标意义更为突出。
Objective: To determine the degree of disability of patients with silicosis by pulmonary ventilation function test. Methods: The pulmonary function data of 310 patients with silicosis were analyzed. Results: With the increase of silicosis stage, the pulmonary function indexes (VC, FEV1, FEV1 / FVC, MVV) decreased obviously and RV / TLC% increased, especially in stage Ⅲ silicosis group. Ventilatory dysfunction is dominated by mixed and restrictive airway obstruction. With the increase of silicosis stage, abnormal ventilation rate increased, the incidence of emphysema increased. Conclusion: The pulmonary ventilation can objectively evaluate the extent of labor loss in patients with silicosis, which plays an important role in the identification of disability. The significance of FEV1 and RV / TLC% is more prominent.