Tutuian Radu, Castell Donald O
Division of Gastroenterology/Hepatology, Medical University of South Carolina, 96 Jonathan Lucas Street, 210 CSB, Charleston, SC 29425, USA.
Gastrointest Endosc Clin N Am. 2005 Apr;15(2):257-64. doi: 10.1016/j.giec.2004.10.009.
Multichannel intraluminal impedance (MII) is a new technology that allows detection of bolus movement without the use of external radiation or radiolabeled substances. The principles of MII are based on changes in resistance to alternating electrical current (impedance) induced by the presence of various boluses within the esophagus. The timing of changes in multiple impedance-measuring segments in the esophagus allows determination of the direction of bolus movement. Combined MII and manometry (MII-EM) provides simultaneous information on intraesophageal pressures and bolus transit, offers the ability to monitor all types of reflux, and allows the detection of the physical (liquid, gas, or mixed) and chemical (acid, nonacid) characteristics of the gastroesophageal refluxate.
多通道腔内阻抗（MII）是一项新技术，可在不使用外部辐射或放射性标记物质的情况下检测食团运动。MII的原理基于食管内各种食团存在时对交流电（阻抗）的电阻变化。食管中多个阻抗测量段变化的时间可确定食团运动方向。联合MII和测压法（MII-EM）可同时提供食管内压力和食团通过的信息，能够监测所有类型的反流，并能检测胃食管反流物的物理（液体、气体或混合）和化学（酸性、非酸性）特征。
