Figure 4:
Median (± interquartile range) concentration increase of volatile organic compounds without mobile smoke evacuation system measured at the oral/nasal position of the experimenter/chief surgeon (40 cm above tissue). Permissible exposure limits were not exceeded for any specific volatile organic compound. Formaldehyde, acetone/propanal and propylbenzene showed a decrease in concentration but were included since they showed an increase (>50 parts per trillion by volume) in the exhaust of the smoke evacuator. ppbv: parts per billion by volume.
