Yonsei Med J.  2000 Apr;41(2):230-236. 10.3349/ymj.2000.41.2.230.

Usefulness of a developed four-channel EGG system with running spectrum analysis

• Kim DW
• Ryu CY
• Lee SI

• KMID: 1758515
• DOI: http://doi.org/10.3349/ymj.2000.41.2.230

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.

Keyword

Electrogastrography; four-channel EGG; pre- and postprandial; electrode placement; running spectrum

MeSH Terms

Action Potentials*
Adult
Human
Stomach/physiology*