To develop a visual prosthesis, it is necessary to understand the changes in the electrochemical properties of stimulating electrodes implanted in the body. To evaluate these properties, we examined three types of equivalent circuit models that represented the electrode interface 23 weeks after the stimulation began. The results indicated that the Randles circuit model with Warburg impedance exhibited the difference in the electrochemical properties of the active and inactive electrodes, which might have been caused by the desorption of adsorbed protein from the electrode surface owing to the stimulation current. This model can be used to characterize the changes in the properties of porous stimulating electrodes.

中文翻译：

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用于表征视网膜假体多孔刺激电极的兰德尔电路模型

为了开发视觉假体，有必要了解植入体内的刺激电极的电化学特性的变化。为了评估这些特性，我们检查了三种类型的等效电路模型，这些模型代表了刺激开始 23 周后的电极界面。结果表明，具有 Warburg 阻抗的 Randles 电路模型表现出活性和非活性电极的电化学性能差异，这可能是由于刺激电流导致吸附的蛋白质从电极表面解吸所致。该模型可用于表征多孔刺激电极的特性变化。