METHOD FOR DETERMINING HEMODYNAMIC PARAMETERS BASED ON MULTICHANNEL ELECTRICAL IMPEDANCE COMPUTER CARDIOGRAPHY Russian patent published in 2022 - IPC A61B5/531 A61B5/535 A61B5/346 

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to a method for determining hemodynamic parameters, such as cardiac shock output and minute volume of heart blood, based on multichannel electrical impedance computer cardiography by recording electrophysiological signals from the chest. To register the signals, an impedance measuring converter is used, which passes an alternating electric current with a frequency from 10 kHz to 100 MHz and an amplitude from 0.01 to 10 mA using current electrodes located on the surface of the skin through the chest. The electrical impedance is determined and its change in the contraction of the heart is used together with the electrocardiogram signal together. Radial electrode channels are located along the border of the projection of the ventricular walls on the chest. An additional thoracic electrode channel for assessing pulse blood filling of soft tissues is located vertically along the spinal column on the chest 10 cm to the right of the localization of the heart in the region of 4-5 intercostal space. Each electrode channel consists of a pair of current and a pair of measuring electrodes and is characterized by half-distances between current and measuring electrodes. The center of the electrode system is located on the chest at the coordinate origin, namely in the coordinate system of the contour of the projection of blood into the heart on the surface of the chest, determined by magnetic resonance imaging or computed tomography at the time before systole.

EFFECT: determination of hemodynamic parameters of the human heart, such as cardiac shock output and minute blood volume, is achieved with increased accuracy through the use of multi-channel electrical impedance computer cardiography, in which the electrodes are located taking into account the anatomical features of the patient’s heart.

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