Abstract
We developed an electrogastrogram (EGG) analysis system and evaluated the effect of meal contents on the dynamic nature of gastric activity. The EGG analysis system consists of hardware and software. Three electrodes were attached on the surface of the abdomen and the electric activity was amplified and digitized at a sampling rate of 250 Hz (Data Acquisition Unit: CM2301, Cerx Co.). The data were temporarily stored on hard disk and sent to a personal computer. Using software specially developed and designed in Microsoft Visual Basic, we analyzed the EGG data of 6 healthy female subjects with a mean age of 21.7 +/- 0.5. To evaluate the dynamic nature of gastric activity, we used 2 parameters: Gastric Motility Index (GMI) and Gastric Ampliludc Index (GAI). These indices were derived from the amplitude and period estimated by the Ixast Squares Cosine Spectrum Method. An intake of 2 rice balls after a meal increased GMI (P<0.05). EGG may provide a useful quantitative and non-invasive technique for evaluation of the dynamic nature of gastric activity in relation to fixwt intnVp.
