[Principles of the design of the equipment for intermittent normobaric hypoxia].

The author relates the principles of the design of the equipment for intermittent normobaric hypoxia. Provides the classification of diagrams, notes advantages and short-comings of the hypoxicators of both groups (forming gas hypoxic mixtures from compressed gases and atmospheric air). Delineates areas where they can be used efficiently.

[The role of acoustic resonance in realizing the effect of high-frequency artificial ventilation of the lungs].

A new explanation of improved oxygenation during high-frequency jet ventilation has been suggested. The mechanism is based on resonance oscillations generated by oscillation and injection high-frequency jet ventilation and promoting gas penetration into the alveoli, PaO2 elevation in perimembrane layer and O2 concentration gradient increase between the alveolar and convection zones. Alveolar and bronchial fluctuations facilitate their drainage and decrease pulmonary shunting.

[Intensification of gas exchange in high-frequency artificial ventilation].

Jet high-frequency artificial ventilation produces oscillations of some parts of the chest wall, which in its turn transmits oscillations to the lung parenchyma. It results in the mix-up of the gas in the alveolar space, which leads to the increase in the gradient of oxygen concentration on the alveolar membranes, thus, augmenting oxygen saturation of the blood. The effect is the same when oscillation artificial ventilation is performed, owing to the provocation of the oscillations amplified by the resonance in the natural acoustic circuit, formed by the adjacent parts of the chest and lung parenchyma.

[Regional pulmonary ventilation in patients with ischemic heart disease].

The state of regional pulmonary ventilation was studied in 41 patients with coronary heart disease (CHD) of various degrees of myocardial affection using pulmophonography. A total degree of ventilation irregularity in the CHD patients did not differ from that of healthy individuals. An increase in this index was noted for the right lung in all the patients.