Title: Selection of surface electrodes for electrogastrography and analysis of normal and abnormal electrogastrograms using Hjorth information

Authors: Paramasivam Alagumariappan; Kamalanand Krishnamurthy; Ponnuswamy Mannar Jawahar

Addresses: Department of Instrumentation Engineering, MIT Campus, Anna University, Chennai 600044, India ' Department of Instrumentation Engineering, MIT Campus, Anna University, Chennai 600044, India ' Karunya Institute of Technology and Sciences, (Deemed to be University) Karunya Nagar, Coimbatore 641114, India

Abstract: Electrogastrogram (EGG) signals recorded non-invasively using surface electrodes, represent the electrical activity of the stomach muscles and these signals are used to diagnose several digestive abnormalities. The surface electrodes play a significant role in the acquisition of EGG signals from human digestive system. In this work, an attempt has been made to demonstrate the role of contact area of surface electrodes for efficient measurement of EGG signals. Two different surface electrodes with contact diameter of 16 mm and 19 mm have been adopted for acquisition of EGG signals. Further, the Hjorth parameters of the EGG signals acquired from normal and abnormal cases suffering from diarrhoea, vomiting and stomach ulcer were analysed. Results demonstrate that the average values of activity, mobility and the complexity of the EGG signals increases with increase in contact area of the surface electrodes. Further, it is observed that there is a significant variation in Hjorth parameters for normal and abnormal cases.

Keywords: surface electrodes; contact area; electrogastrogram; EGG; activity; mobility; complexity; Hjorth parameters; information measures.

DOI: 10.1504/IJBET.2020.107201

International Journal of Biomedical Engineering and Technology, 2020 Vol.32 No.4, pp.317 - 330

Received: 18 Mar 2017
Accepted: 11 Jul 2017
Published online: 11 May 2020 *

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