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Improving the reliability of cardiological diagnostics of arrhythmias using stochastic parameters of spectral dynamics of rhythmograms
(Національний аерокосмічний університет ім. М. Є. Жуковського "Харківський авіаційний інститут", 2020) Sokol, Yevgen I. ; Shapov, Pavel; Kulichenko, Viacheslav; Tomashevskyi, Roman; Gorbulitch, Alexandr; Muzhychuk, Oleksii
The article presents the results of a theoretical analysis of the parameters of a two-dimensional autocorrelation function and it`s filtering in time, the results of dynamic modeling of arrhythmia identification procedures using training rhythmograms. The possibility of intellectualization of identification procedures using the statistical procedure of Wald's sequential analysis has been proved. Results of parametric identification of cardiac conditions by changes in the characteristics of correlation-spectral non-stationarity of rhythmograms in a sliding observation window
Opportunity and planning bim-analysis for monitoring blood
(Національний технічний університет "Харківський політехнічний інститут", 2018) Tomashevskyi, Roman; Sokol, T.; Dotsenko, Z.
Results of the study of the possibility of using the results of the bioimpedanceometry method for monitoring hidden and spontaneous bleeding are presented. The current problem of accounting for blood loss during resuscitation, surgery and rehabilitation activities is shown. The use, as informative parameters, of the spectral properties of the bioimpedance signal, namely, the coefficient of inter-spectral correlation of the original measurement signal and its linear transformation is proposed. In work, the existing models substantiating the prospects of using the bioimpedance methodfor such problems are considered in detail, and the calculated empirical expressions for determining the volume of liquid segments of the human body are given. The mathematical substantiation of the method of inter-spectral correlation based on the calculation of the correlation coefficients of the wavelet-decomposition coefficients of the original signal and its linear transformation is given. The results of experimental studies on the approbation of this method for fixed venous blood sampling are presented in the work. Using criterial T-statistics, a quantitative evaluation of the effectiveness of the options for choosing the spatial placement of measuring electrodes in bioimpedanceometry was carried out. The obtained results allow to draw a conclusion about the possibility and prospects of the proposed method for real-time monitoring of the onset of latent and spontaneous hemorrhages, and also make it possible to formulate recommendations for placement of measuring electrodes on the patient's body.
System for Recording Evoked Potentials in Liquid Biological Matrix
(IPM NASU, 2017) Tomashevskyi, Roman; Vikarii, Yevhen; Dotsenko, Zinaida
The article deals with the development and investigation of a system for recording, amplifying and processing weak evoked potentials in liquid biological matrix. The main attention is paid to the study of the parameters of this system.
Using 2.4 GHz Radio Module for Transmitting Spirometers Data: Human Safety Testing
(IPM NASU, 2017) Batachenko, Serhiy; Tomashevskyi, Roman; Makarov, Vadim
Screening Diagnostic System for Chronic Obstructive Pulmonary Diseases
(Institute of Electrical and Electronics Engineers, 2016) Poreva, Anna; Honcharenko, Oleksandr; Tomashevskyi, Roman; Batachenko, Serhiy; Kulichenko, Viacheslav
Preventive screening examinations of the population are one of the most effective ways to prevent COPD today. In this paper the problem of technical support of chronic obstructive pulmonary disease diagnosis is described. Transmit channel data and testing of technical capabilities of NRF24L01-module for implementation in screening diagnostic system are analyzed. The present measurements agree with the following IEEE basic standards: IEEE 802.15 and IEEE 802.15g.
System for Flow Rate Regulation with Pulse-Width Modulation
(Kyiv polytechnic institute, 2014) Tomashevskyi, Roman; Kulichenko, Viacheslav; Mahonin, Nikolay
In article describes the concept of the flow control system for ozone-oxygen mixture, using the principles of pulse-width modulation. The basic equation for calculation of the system measurement channel are given. Experimental studies of such air channel system and its performance characteristics are describes. The possibility of using flow control system ozone-oxygen mixture in medical ozone is shown.

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