Zhou M, Zhang H, Shaw R, Barnes F S
Medical Testing Technology Institute, Boulder, CO 80304, USA.
IEEE Trans Biomed Eng. 1997 Dec;44(12):1228-36. doi: 10.1109/10.649994.
The purpose of this study was to develop a real-time multichannel computerized electrogastrograph (EGG) to measure and analyze electrical signals from the human abdominal surface. A soft-contact matrix composed of 25 cutaneous electrodes is embedded evenly in a latex mat. The mat can be firmly attached to the abdominal surface by drawing a vacuum between the matrix and the stomach. Twenty-five high-amplification filter/amplifiers provide a high signal-to-noise ratio and flat amplitude response for a signal between 0.02 and 0.12 Hz (1.2-7.2 cpm). The computer program provides waveform and frequency analysis for any chosen channel and mapping analyses for all 25 channels. A two-dimensional propagation exploration program was also developed. Using four different mapping analysis program subroutines, the optimal points for analyzing the EGG signals can be reliably found and variability of these locations can be observed easily. Results show differences in the EGG mappings of normal and abnormal subjects.
本研究的目的是开发一种实时多通道计算机化胃电图（EGG），用于测量和分析来自人体腹部表面的电信号。一个由25个皮肤电极组成的软接触矩阵均匀地嵌入乳胶垫中。通过在矩阵和胃部之间抽取真空，该垫子可以牢固地附着在腹部表面。25个高放大倍数滤波器/放大器为0.02至0.12赫兹（1.2 - 7.2次/分钟）之间的信号提供高信噪比和平坦的幅度响应。计算机程序为任何选定的通道提供波形和频率分析，并为所有25个通道提供映射分析。还开发了一个二维传播探索程序。使用四个不同的映射分析程序子程序，可以可靠地找到分析EGG信号的最佳点，并且可以轻松观察到这些位置的变异性。结果显示正常和异常受试者的EGG映射存在差异。
