[Conditions for the development of isobaric counterdiffusion of inert gases and the criteria of its evaluation].

Investigation of superficial counterdiffusion of nitrogen against helium has been carried out to evaluate a possibility of its progress in divers (107 tests) under pressures equivalent to 32-450 m of sea water when breathing trimix being saturated in heliox at a constant ambient pressure without changing chamber environment. Breathing gas mixture contained 248-800 kPa of nitrogen, while chamber heliox media contained some additions of nitrogen (6-108 kPa). Clinical manifestations of breathing trimix (itching and gas bubble formation) were studied in divers.

[A hollow bougie and its use for therapeutic and diagnostic purposes in esophageal stenosis of unclear etiology].

The results of treatment of patients with stenosis of the esophagus of unrecognized genesis are discussed. The traditional method of diagnosis, radiological and endoscopic with target biopsy, produced diverse results. The authors describe a method for bougienage of the esophagus by means of an original bougie with which dilatation of the stenosed segment can be combined with collection of bioptic material from the stenosed part and its lower pole.