Abstract
Investigation of the effects of different oxygen concentrations on the tracheal ciliary activity in vitro show that there is a dose-response relationship. That means that low concentration of oxygen from 0.1% to 0.25% are toxic while concentrations of oxygen from around 1% do not seem to have any ciliastatic effect. Even if the oxygen concentration was increased to almost 100% no toxicity could be registered. These results are in accordance with earlier investigations. The next question to be answered is if the oxygen supply through a normal circulartion is sufficient to maintain ciliary activity if the trachea is covered with pure argon. These experiments have been started.
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