单个电极接触不良对腹部电阻抗断层成像的影响

Influence of bad contact of single electrode on electrical impedance tomography

目的:研究单个电极接触不良和电阻抗断层成像之间的关系,以便为长期监护提供必要的理论和现实依据.方法:采用电阻抗成像监护仪对14人采用16电极法进行监护,对比电极接触良好和其中某一个电极接触不良时监护图像的差别.结果:发现某一电极接触不良,则对应它的那一部分图像的灰度会发生明显的变化,而图像其他部分的灰度则变化很小.结论:得出了单个电极接触不良对成像的影响的规律,对长期监护中电极接触不良问题的监测提供了依据.

AIM： To study the relationship of bad contact of signal electrode and electrical impedance tomography （EIT） and to provide premise in theory and practice for long-term monitoring. METHODS： EIT was used to monitor 14 subjects with 16 electrodes. The images of good contact of all electrodes were compared with the images of bad contact of single electrode. RESULTS ： Bad contact of one electrode affected only part of the image, with some visible changes. CONCLUSION： We have found out the influence of bad contract of a single electrode, which provides premise for long-term monitoring.