Mintchev M P, Stickel A, Otto S J, Bowes K L
Department of Electrical and Computer Engineering, University of Calgary, Alta., Canada.
IEEE Trans Biomed Eng. 1997 Dec;44(12):1288-91. doi: 10.1109/10.650001.
The aim of this study was to examine the reliability of percent distribution of electrogastrographic (EGG) power in recognizing gastric electrical uncoupling. Sixteen anaesthetized dogs underwent laparotomy and implantation of six pairs of stainless-steel wire electrodes. Distal stomach was measured and three sections with approximately equal lengths were defined. Two pairs of electrodes were implanted in each section. Eight-channel EGG was also recorded. Three separate half-hour recordings were made: in the basal state; after a full circumferential separation of the distal antral section from the rest; after a second circumferential cut completely separating the middle from the proximal sections. EGG digital power spectra were split into three frequency ranges and dynamics of percent distribution of power was statistically examined. After the first cut, changes in the percent distribution of EGG power in the normal range were not significant (p = 0.2). Significant changes in the low range were noted (p < 0.05) and changes in the high range were borderline nonsignificant (p = 0.056). After the second cut, changes in percent distribution in the normal and the high range became significant (p < 0.01) while changes in the low range were insignificant (p = 0.075). Severe uncoupling was reflected in EGG by significant changes in the high-frequency range without internal tachygastria necessarily being present.
本研究的目的是检验胃电图（EGG）功率百分比分布在识别胃电解耦方面的可靠性。16只麻醉犬接受剖腹手术并植入6对不锈钢丝电极。测量胃远端并定义三个长度大致相等的节段。每个节段植入两对电极。同时记录八通道EGG。进行三次单独的半小时记录：基础状态下；远端胃窦节段与其余部分完全环周分离后；第二次环周切割将中间节段与近端节段完全分离后。将EGG数字功率谱分为三个频率范围，并对功率百分比分布的动态变化进行统计学检验。第一次切割后，正常范围内EGG功率百分比分布的变化不显著（p = 0.2）。低频率范围内有显著变化（p < 0.05），高频率范围内的变化接近无显著性（p = 0.056）。第二次切割后，正常范围和高频率范围内的百分比分布变化变得显著（p < 0.01），而低频率范围内的变化不显著（p = 0.075）。严重解耦在EGG中表现为高频范围内的显著变化，不一定伴有内部快速性心律失常。
