Mangnall Y F, Barnish C, Brown B H, Barber D C, Johnson A G, Read N W
Department of Surgery, Royal Hallamshire Hospital, Sheffield, England.
Clin Phys Physiol Meas. 1988 Aug;9(3):249-54. doi: 10.1088/0143-0815/9/3/004.
Two new non-invasive methods of measuring gastric emptying, impedance epigastrography (IE) and applied potential tomography (APT) have been compared. Measurements in vitro showed that there is a good correlation between the square of the radius of a glass rod placed in the centre of a tank and values obtained by IE or APT. However, if the rod is moved anteriorly in the tank IE values increase markedly, whereas APT values are unchanged. Both APT and IE can be used to follow gastric emptying of liquid meals; however, the results obtained using APT are more reproducible and have a better correlation with those obtained simultaneously by scintigraphy. Neither method was able accurately to follow gastric emptying unless gastric acid secretion was inhibited by cimetidine.
两种测量胃排空的新无创方法——阻抗胃电图（IE）和应用电位断层扫描（APT）已被比较。体外测量表明，置于水箱中央的玻璃棒半径平方与通过IE或APT获得的值之间存在良好的相关性。然而，如果玻璃棒在水箱中向前移动，IE值会显著增加，而APT值不变。APT和IE均可用于跟踪流食的胃排空；然而，使用APT获得的结果更具可重复性，并且与同时通过闪烁扫描法获得的结果具有更好的相关性。除非用西咪替丁抑制胃酸分泌，否则两种方法都不能准确跟踪胃排空。
