[Obstructive changes in the lung of young smokers].

The results from the spirometric investigations of pulmonary function in comparable grpis pf 28 smokers and 37 non-smokers at the age of 20 are presented. Positive obstructive changes were established to be present in the lungs of the smokers (smoked about 20 cigarettes daily in the course of four years and more); they were varified by the essential decrease of FEO1, MRFR200-1200, MAEFR25-75, EFR25 and EFR10. MMV50 is decreased with a critical statistical significance.