The accurate detection of fiducial points in the impedance cardiography signal (ICG) has a decisive impact on the proper estimation of diagnostic parameters such as stroke volume or cardiac output. It is, therefore, necessary to find an algorithm that is able to assess their positions with great precision. The solution to this problem is, however, quite challenging with regard to the high sensitivity of the ICG technique to the noise and varying morphology of the acquired signals. The aim of this study is to propose a novel method that allows us to overcome these limitations. The developed algorithm is based on Empirical Mode Decomposition (EMD)—an effective technique for processing and analyzing various types of non-stationary signals. We find high correlations between the results obtained from the algorithm and annotated by an expert. This, in turn, implies that the difference in estimation of the diagnostic-relevant parameters is small, which suggests that the method can automatically provide precise clinical information.
The article presents the main technological aspects of systems of telemonitoring of biomedical parameters, based on the example of research carried out in the Łukasiewicz Research Network — Institute of Medical Technology and Equipment, Zabrze. Medical telemonitoring covers technologies for the acquisition, processing and analysis of biomedical information. Data sources and technologies for obtaining biomedical information are an important element of medical telemonitoring. Medical telemonitoring systems are one of the main elements of telemedicine or telehealth. Telemonitoring of vital biomedical parameters is mainly used to perform remote diagnostics and medical rehabilitation. This applies primarily to patients from the so-called “high risk” groups, who are treated or rehabilitated outside hospitals. An important area for the application of medical telemonitoring is the safety of people working under extreme or stressful conditions. Telemonitoring of vital parameters can also be used to increase the safety of those who engage in physical activity for health promotion, sports and performance.
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