Parasitic capacitances and high‐residual impedances (typical of electrode/tissue interfaces) have significant effects on estimated electrical impedances of tissues under study. This leads to deviations (especially at high frequency) from the true tissue impedance. This work outlines the circuit theory describing estimation errors occurring when one and two parasitic capacitances are present in tetrapolar electrode configurations typical for bioimpedance measurements. The described circuit theory was validated using both simulations and measurements of a fabricated printed circuit board that implemented the tetra‐polar model. Using the presented model, correction procedures using (a) measurements of the source and sink excitation currents and (b) averaging measurements of forward and reverse electrode configurations have been validated in simulation showing reductions in the estimation errors at frequencies greater than 1 MHz.

中文翻译：

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具有高阻抗残留的仿真生物阻抗测量中寄生电容效应的建模和实验验证

寄生电容和高残留阻抗（电极/组织界面的典型值）对所研究组织的估计电阻抗有重大影响。这导致与真实组织阻抗的偏差（特别是在高频下）。这项工作概述了电路理论，描述了在生物阻抗测量典型的四极电极配置中存在一个和两个寄生电容时出现的估计误差。所描述的电路理论通过模拟和测量实现四极模型的印刷电路板的方法得到验证。使用提出的模型，