Usefulness of a developed four-channel EGG system with running spectrum analysis.
10.3349/ymj.2000.41.2.230
- Author:
Deok Won KIM
1
;
Chang Yong RYU
;
Sang In LEE
Author Information
1. Department of Medical Engineering, Yonsei University College of Medicine, Seoul, Korea. kdw@yumc.yonsei.ac.kr
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
Electrogastrography;
four-channel EGG;
pre- and postprandial;
electrode placement;
running spectrum
- MeSH:
Action Potentials*;
Adult;
Human;
Stomach/physiology*
- From:Yonsei Medical Journal
2000;41(2):230-236
- CountryRepublic of Korea
- Language:English
-
Abstract:
Electrogastrography (EGG) is a method of measuring action potentials on the abdomen. It is noninvasive, inexpensive and easy to measure. However, the EGG signal has a very low frequency (0.05 Hz) and an extremely low amplitude (10-100 microV). Consequently, its measured waveform is difficult to analyze and it is not yet completely understood. In this study, a four-channel EGG measurement system was built to measure the action potential of the stomach. This system was compared with the commercially available one-channel Digitrapper EGG. The 3 cpm percentages were compared between the best channel of the four-channel system and channel 1, whose electrode position was similar to the commercially available one-channel system for normal subjects. The average 3 cpm percentage of the best channel and channel 1 for preprandial measurement was 89.5% and 83.2%, respectively, and this was statistically significant (p < 0.001). Also the average 3 cpm percentage of the best channel and channel 1 for postprandial measurement was 90.4% and 76.5%, respectively, and this was statistically significant (p = 0.003). From these results, it can be concluded that a multi-channel EGG system is required for better EGG measurement.
