Smout A J, Jebbink H J, Akkermans L M, Bruijs P P
Department of Gastroenterology, University Hospital, Utrecht, The Netherlands.
Dig Dis Sci. 1994 Dec;39(12 Suppl):110S-113S. doi: 10.1007/BF02300387.
Electrogastrography records electrical potential variations brought about by myoelectrical activity of the stomach. Abnormal myoelectrical rhythms such as tachygastrias may also be detected. Electrogastrography provides little information on gastric motility and emptying. Impedance epigastrography is a technique that uses changes in epigastric impedance to evaluate gastric emptying of large-volume liquid meals. The results are inferior to those of tomographic impedance imaging. Phasic antral contractions may lead to phasic impedance changes recorded with nonimaging techniques and a phasic signal recorded with high-speed electrical impedance tomography. However, the relationship between phasic contractions and phasic variations in impedance do not appear consistent enough to allow clinical application of the technique.
胃电图记录由胃肌电活动引起的电位变化。也可检测到异常的肌电节律，如胃动过速。胃电图提供的关于胃动力和排空的信息很少。阻抗胃造影术是一种利用上腹部阻抗变化来评估大量流质食物胃排空的技术。其结果不如断层阻抗成像。相位性胃窦收缩可能导致非成像技术记录到的相位性阻抗变化以及高速电阻抗断层扫描记录到的相位性信号。然而，相位性收缩与阻抗的相位变化之间的关系似乎不够一致，无法用于该技术的临床应用。
