Study on Pulmonary Function of 57 Patients With Silicosis

Objective To explore the damage of pulmonary function of silicosis patients.Methods The pulmonary function examination was conducted among 57 male silicosis patients.The indicators of lung function included VC(vital capacity),FVC(forced vital capacity),FEV1(the first second forced expiratory volume),MMEF(maximal midexpiratory flow rate),V50(maximal expiratory flow in fifty percent vital capacity)and V25(maximal expiratory flow in twenty five percent vital capacity).Results The damage types were mainly mixed ones among the silicosis patients.The lung function of silicosis patients at stageⅡwas obviously lower than that of those at stageⅠin FEV1%,FEV1/FVC,V25,V50 and MMEF.Conclusion The pulmonary function of the silicosis patients was damaged obviously,which increased with the stage of silicosis,and the types of the damage were mainly mixed ones.Compared with stage I,the big airway and small airway obstructions of silicosis patients at stage II were more severe.