[Gastroesophageal reflux as the basis of recurrent and chronic respiratory diseases].

Among many causes of relapsing and chronic respiratory diseases in children the authors revealed gastrooesophageal reflux (GER) in 53 of 106 examined children, i.e. in 50%.

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 less than 0.005) reduced and morphological signs of impaired self-cleaning ability were revealed.