عملکرد سیستم تنفسی شاغلین یک کارخانه شیشه سازی با آزمونهای اسپیرومتری

ABSTRACT A case study from July 1993 to June 1994 was carried out on the 711 persons of a glassplant workers (case), and 133 persons of a manufacturing foodstuffs workers (control). The purpose of this research is to determine the respiratory function due to free silica exposure. Statistical analysis of the spirometry test (18 parameters) show significant differences between averages of VC, FVC and FEF %25(P=0.003), FEV1/VC, FEV1/ FVC, FEF %25-75 FMFT,FEF%75-85 and FEF%75 (P<0.001) in case and control groups. Decrease of respiratory parameters in case group in comparison with control group was as follows: FEF%75-85- 17%, FMFT 14.8%. FEF75 10.5%, FEF 25-75 7.3%, FEF25 4.4%, EFV0.5/ FVC 4%, FEV1/ FVC 3.7%, FEV1/VC 3.5%, FVC 3.3%, FEV3/ FVC 3.2% and VC 3%. The results of spirometry tests analysis show that FEFs should be measured in evaluation of exposure to industrial dust (specially free silica).