一种通过同时测量传输时间和收缩频率来评估胃肠动力的便携式方法。
A portable method for assessing gastrointestinal motility by simultaneously measuring transit time and contraction frequency.
作者信息
Li H, Yan G
机构信息
Institute of 820, Department of Instrument Science & Engineering, School of Electronic, Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai, China.
出版信息
J Med Eng Technol. 2008 Nov-Dec;32(6):448-55. doi: 10.1080/03091900802133699.
To portably monitor the motility of the total GI tract, a method for assessing GI motility by simultaneously measuring transit time and contraction frequency is put forward. The portable monitoring system is composed of a swallowable telemetric capsule, a portable recorder, magnetizing coils deposited in vitro, and workstation for data processing. The transit time and contraction frequency of the GI tract are deduced by analysing the variation of the position and orientation angles of a telemetric capsule in time domain and frequency domain. AC electromagnetic localization method is used to determine the position and orientation of the telemetric capsule in vivo. In the paper, the localization model based on a quasi-static magnetic field, the method of monitoring GI motility and the set-up of the monitoring system are detailed. Then from static and dynamic experiments, the performances of the system including the accuracy and dynamic response are evaluated. Finally, the electromagnetic safety of the system is verified by simulating electromagnetic radiation to the human body.
为了便于监测整个胃肠道的蠕动，提出了一种通过同时测量传输时间和收缩频率来评估胃肠动力的方法。便携式监测系统由可吞咽遥测胶囊、便携式记录器、体外沉积的磁化线圈和用于数据处理的工作站组成。通过在时域和频域分析遥测胶囊的位置和方位角的变化来推导胃肠道的传输时间和收缩频率。采用交流电磁定位方法来确定体内遥测胶囊的位置和方位。本文详细介绍了基于准静态磁场的定位模型、胃肠动力监测方法以及监测系统的设置。然后通过静态和动态实验，评估了系统的性能，包括准确性和动态响应。最后，通过模拟对人体的电磁辐射来验证系统的电磁安全性。
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