Effects of 90% Oxygen Exposure on the Ultrastructure of the Tracheal Epithelium in Rabbits

Numerous signs of pathological alteration were induced in the pseudostratified ciliated epithelium by a 2-hour exposure to 90% oxygen. The ciliary border injury was especially conspicuous, the mean number of cilia in a given area was significantly (p 2 was rapid discharge of mucus, but the mechanism of mucus evacuation was not substantially influenced. At the ultra-structural level, only a mild effect of humidification of the oxygen was observed