Computer Analysis of Gastroduodenal Electrical and Mechanical Signals

Abstract

<p>The gastroduodenal junction coordination was studied by conducting experiments on six dogs. The electrical and mechanical signals in the gastroduodenal area were recorded by surgically implanting electrodes and strain gauges. Recordings were made on an analog tape recorder for about 30 minutes in the fasted state and for about 45 minuted after food or with intravenous infusion of pentagastrin. The recorded signals were later fed into Data General Nova 830 Minicomputer for subsequent analysis. In analysing these signals frequency is of prime importance as interaction could result in the argumentation of the proximal duodenal electrical/mechanical signal at antral frequency. The application of spectral analysis techniques for this purpose is described. The programs are developed for the following purposes:</p> <p>1) To accept the analog data and convert them into discrete digital data.</p> <p>2) To display any segment of data for visual observation of recorded signals.</p> <p>3) To compute the auto and cross power spectral density.</p> <p>The results of the analysis are presented in the form of tables. It is concluded that there exists a coordination. The possible mechanism could be myogenic, since coordination in the electrical activity is evident when atropine was given.</p>