[Combined action on the body of carbon monoxide and normobaric hyperoxia]

Thirty-day experiments on white male rats were carried out to determine the combined effect of carbon monoxide and hyperoxic atmosphere on the animal body. The two factors showed an antagonistic biological effect, the influence of hyperoxic atmosphere prevailing over that of carbon monoxide. It is suggested that during a combined exposure of animals to the two factors maximally allowable concentrations of each can be used without any corrections.