Abstract
Electrogastrograms (EGG) are electrical signals generated by the muscles of the stomach and the features of these signals can be used to diagnose several digestive disorders. Entropy is a measure of the disorder associated with a system and hence is a measure of complexity of the system. In medical diagnostics, entropy has proved to be an efficient feature for discriminating the normal and abnormal states of biological systems. In this work the EGG signals have been obtained from normal and abnormal subjects having different digestive abnormalities (diarrhea, vomiting and stomach ulcer), from a local hospital. Further, the Tsallis entropy associated with the collected signals has been analyzed. Results demonstrate that the Mean Tsallis Entropy (MTE) (with α=0.5) of the EGG signals obtained from normal individuals (MTE=313.861) is high when compared to the individuals having diarrhea (MTE=278.0259), vomiting (MTE=105.1278) and stomach ulcer (MTE=-839.201). Since, entropy is the complexity associated with the signal, it is found that the complexity of the normal EGG signals is high when compared to the abnormal EGG signals. This work appears to be of high clinical relevance, since feature extraction from EGG signals is highly useful for diagnosis of digestive abnormalities.
Highlights
The gastrointestinal tract (GI) or digestive tract is made up of the esophagus, stomach, large and small intestines, liver, pancreas and the gallbladder
It is found that the mean Tsallis entropy values of normal individual is higher when compared to the entropy values of individuals having abnormalities, at different α values
Electrogastrography is a noninvasive technique to record the electrical activity of the digestive system and the features obtained from these signals are useful for diagnosis and staging of several digestive diseases
Summary
The gastrointestinal tract (GI) or digestive tract is made up of the esophagus, stomach, large and small intestines, liver, pancreas and the gallbladder. The process of digestion has several stages in which the food is broken into smaller parts and the nutrients are absorbed [1]. Digestive diseases are disorders of the digestive tract. The initial stage of problems in the digestive tract includes several symptoms like bleeding, bloating, diarrhea, constipation, heartburn, nausea, vomiting etc. Investigation of digestive disorders includes upper GI endoscopy, ultrasound endoscopy, Electrogastrography etc. The diagnosis of the digestive diseases is invasive and a complex task and Electrogastrography (EGG) can serve as an efficient and noninvasive alternative for diagnosis of digestive disorders [2]
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