New tetrapolar circuit method using magnetic field for measurement of local impedance change in biological substances
New tetrapolar circuit method using magnetic field for measurement of local impedance change in biological substances
复制标题
利用磁场测量生物物质局部阻抗变化的新型四极电路方法
DOI：
10.1109/10.43615
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发表时间：
1990
影响因子：
4.6
通讯作者：
M. Hongo
中科院分区：
文献类型：
--
作者：
T. Takemae;Y. Kosugi;H. Saito;J. Ikebe;S. Okubo;M. Hongo
提出了一种使用磁场的四极电路和方法，用于测量活体组织中的局部电阻抗变化。在此基础上，作者设计了一种能同时独立检测两个相邻部位的阻抗变化的装置。使用该装置，他们通过体外实验和前臂动脉中脉动波形的体内测量显示了所提出的方法的有效性。局部阻抗变化的检测灵敏度被证实高于传统的四极方法。在前臂桡侧和尺侧测量的脉动阻抗波形与从解剖结构估计的波形一致。<<ETX>>
A tetrapolar circuit and method using a magnetic field is proposed for measuring the local electric impedance change in living tissue. On the basis of this method, the authors designed an apparatus that can detect impedance changes in two closely situated parts of living tissue, simultaneously and independently. Using this apparatus, they showed the effectiveness of the proposed method by an in vitro experiment and by an in vivo measurement of pulsatile waveforms in the forearm arteries. The detection sensitivity for a local impedance change was confirmed to be higher than that of the conventional tetrapolar method. Pulsatile impedance waveforms measured in the radial and the ulnar parts of the forearm were consistent with those estimated from the anatomical structure.<<ETX>>