[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.

[Indicator volume spirometers].

Pointer volume-spirometers are shown to be of great importance in mass health screening. Considerations are given to design and operational parameters of some state-of-the-art models.

[Study of the pneumotachograph with the Pito tube].

The pneumotachograph with a velocity head flowmeter and a linearization system has been studied. Theoretical and experimental results have revealed a possibility to design a multilevel pneumotachograph with the Pito tube providing gas output measurements at a wide respiration range while the slight flow resistance and the small dead space being maintained. It also allows for undisturbed data recording.

[Analysis of a pulmophonogram for assessing local pulmonary ventilation].

The method offered for pulmophonogram processing is based on definition of an easily measured simplest parameter, a relation between maximum and minimum values of the electrical signal being recorded. This value measured under different clinical conditions without considerable methodical errors is used for reliable and precise assessment of three parameters: relative local specific ventilation, relative local specific volume and local specific lung ventilation capacity. The proposed formulas of the local respiration parameters can be applied in both manual pulmophonogram processing with elementary computing aids, and in computer processing of pulmophonographic information.