Acute effect of cigarette smoking on peak expiratory flow rate and ventilation in resting Nigerian subjects

Abstract

The effects of cigarette smoking on peak expiratory flow rate (PEFR) and ventilation (V) in resting Nigerian subjects had been investigated in healthy male subjects (10 smokers, 8 non-smokers). The PEFR, V and tidal volume (VT) decreased significantly after smoking two medium-ta r cigarettes. The action of smoke particles (carbon and tar) on the irritant receptor reflex of the lung, thus producing bronchoconstriction, and the depressant action of nicotine on the peripheral chemoreceptors, central chemoreceptors and respiratory centre may be the causal factors.