Biomedical subjects
Publications and source records attributed to V N Ustinov.
The changes of the parameters of Fourier's transformations of electrogastrorhythmograms of humans after feeding are investigated as well as of dogs after vagotomy. The study has demonstrated that the method of myoelectronic electrical stimulation (with feedback) may be used for estimation of efficiency of vagotomy.
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The changes in the frequency parameters of the basic electrical gastric rhythm were studied with the application of cutaneous electrodes in men. The study has demonstrated that the frequency parameters of the basic electrical gastric rhythm are dependent on the organ's functional state. The frequency parameters can be used for the identification of the gastric functional state both in healthy and sick subjects.
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In chronic experiments on dogs, every peristaltic wave of the stomach was syndhronous with a burst of spike potentials on its secondary electric wave. Its primary electric waves are a xyndhronizer of tis peristalsis. In normal physiological conditions, the amplitude of the stomach primary electric waves was shown to be relatively stable, while regarding its functional condition the amplitude of its peristaltic waves may change to a great extent: from 0 to 200 g.
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Results are presented of electrical stimulation of smooth muscles of the stomach by impulses of an electronic device. The work of the latter was synchronized by biopotentials of this organ circulating in the external feedback contour. Myoelectronic control of the frequency of the stomach basic electrical rhythm permits artificial maintenance of its value on quasi-constant level exceeding the initial one by 1.2-1.4 times. The data obtained are explained by a reduced system of differential equations describing the myoelectrical activity of the stomach smooth-muscle cell in terms of the excitable membrane theory.
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