Parkman H P, Hasler W L, Barnett J L, Eaker E Y
GI Section, Department of Medicine, Temple University Hospital, Philadelphia, PA 19140, USA.
Neurogastroenterol Motil. 2003 Apr;15(2):89-102. doi: 10.1046/j.1365-2982.2003.00396.x.
The objective of this document is to present the consensus opinion of the American Motility Society Clinical GI Motility Testing Task Force on the performance and clinical utility of electrogastrography (EGG). EGG is a non-invasive means of recording human gastric myoelectrical activity or slow waves from cutaneous leads placed over the stomach. In healthy volunteers, EGG tracings exhibit sinusoidal waveforms with a predominant frequency of 3 cycles per minute (cpm). Clinical studies have shown good correlation of these cutaneous recordings with those acquired from serosally implanted electrodes. The amplitude of the EGG waveform increases with ingestion of caloric or non-caloric meals. Some patients with nausea, vomiting, or other dyspeptic symptoms exhibit EGG rhythm disturbances or blunting of meal-evoked EGG signal amplitude increases. These abnormalities correlate to some degree with delayed gastric emptying of solids. In selected patients, EGG may be complementary to gastric emptying testing. To date, no therapies have convincingly demonstrated in controlled studies that correcting abnormalities detected by EGG improves upper gastrointestinal symptoms. Proposed clinical indications for performance of EGG in patients with unexplained nausea, vomiting and dyspeptic symptoms must be validated by prospective controlled investigations.
本文档的目的是介绍美国动力学会临床胃肠动力检测特别工作组关于胃电图（EGG）的操作及临床应用的共识意见。EGG是一种通过放置在胃部上方的皮肤电极记录人体胃肌电活动或慢波的非侵入性方法。在健康志愿者中，EGG记录呈现正弦波形，主要频率为每分钟3次周期（cpm）。临床研究表明，这些皮肤记录与通过浆膜植入电极获得的记录具有良好的相关性。EGG波形的幅度会随着摄入热量或非热量食物而增加。一些有恶心、呕吐或其他消化不良症状的患者表现出EGG节律紊乱或进食诱发的EGG信号幅度增加不明显。这些异常在一定程度上与固体食物胃排空延迟相关。在特定患者中，EGG可能是胃排空检测的补充。迄今为止，在对照研究中，尚无治疗方法能令人信服地证明纠正EGG检测到的异常可改善上消化道症状。对于不明原因恶心、呕吐和消化不良症状患者进行EGG检测的拟议临床适应证，必须通过前瞻性对照研究进行验证。
