EVALUATION OF OPPORTUNITY BIOMEPEDOMSOMETRY FOR MONITORING OF ULTRAFILTRATION PROCEDURE
Journal Title: Вчені записки Таврійського національного університету імені В. І. Вернадського. Серія: Технічні науки - Year 2018, Vol 29, Issue 4
Abstract
The research aimed at developing and approbation of the modified method of covariance analysis of the BIM signal for solving the problems of information support of the ultrafiltration procedure in real time mode is carried out. The modification of this method is based on the use of bioimpedance measurements at different frequencies as multiple measurements in one time coordinates. The aim of the study was to obtain additional information, primarily on the relative rate of measurement of fluid volumes of the vascular bed and intercellular fluid. In the article the mathematical substantiation of the modification of the classical covariance analysis method is given, the table of covariance decomposition is given, the model of this decomposition is proposed taking into account the influence of the factor on the signal trends. Two methods of preliminary data preparation for using the new method are also proposed, which allow to investigate the local part of the procedure (scan) or to take into account the entire previous history from the moment of the procedure start (accumulation). Approximation of the developed method on the experimental data obtained during the ultrafiltration procedures of 7 patients was carried out, which showed the effectiveness of this method of control in 79% of cases with a confidence of 0.95. Also in the work, an evaluation of the effectiveness, based on the experimental data, of the developed method on the classical covariance analysis was carried out. Efficiency evaluation showed an increase in the amount of information in the experiment, using the new method, 2.68 times and 2.07 times, using scanning or accumulation techniques, respectively.
Authors and Affiliations
Р. С. Томашевский
Keywords
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