Effects of Configuration and Dimension of Concentric Ring Electrodes in EEnG Recording Applications

A Flexible Multiring Concentric Electrode for Non-Invasive Identification of Intestinal Slow Waves

“…The use of the developed multi-CRE for non-invasive EEnG recording permitted the study of the influence of the factors affecting recording conditions on different signal quality parameters of this specific application. In a preliminary work, we computed a reduced set of parameters (%DF TFSW, PR RESP , PR LF and %DF SW ) for different ring sizes and configurations with multi-CRE in below navel position and adhesive material [ 30 ]. In the present work, factors such as the recording position and the type of adhesive material have also been considered, and its effects has been studied for a more comprehensive set of 10 parameters.…”

“…Since all the rings were 2 mm wide, this behavior could be due to the larger skin-to-electrode contact area and the associated reduced contact impedance. On the other hand, the influence of respiratory interference on the EEnG record is greater with increasing ring size, probably because the possible movements of the central disk and the outer ring caused by respiration are less temporarily synchronized by the larger outer ring [ 30 ]. The best results in terms of intestinal SW identification and global signal quality were obtained with the 30 mm outer diameter ring, which manages to balance the previously indicated factors.…”