Detection of gastrointestinal tract events from multichannel intraluminal impedance measurements

Investigation of Gastrointestinal tract (GIT) using multichannel intraluminal impedance technique (MII) is presented. The MII traces have large variations which correspond to the occurrence of certain activity that causes the impedance to change. A technique to detect the tract events from MII data is developed using wavelet transform. The resulting transformed signals are used to detect the occurrence of GIT events and to classify the events as swallow, reflux, or gas reflux. The technique is also used in estimating reflux event duration and the bolus velocity.