Technical note. Estimated electrode operating conditions of the first London Mk V implanted stimulator.
Technical note. Estimated electrode operating conditions of the first London Mk V implanted stimulator.
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技术说明。
DOI：
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发表时间：
1998
影响因子：
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通讯作者：
T. A. Perkins
中科院分区：
文献类型：
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作者：
P. E. K. Donaldson;N. N. de Donaldson;D. Rushton;T. A. Perkins
植入刺激器的电极必须以这样的方式操作：实现将金属中的电子流转换成组织中的离子流的任务，而不将有毒化学物质释放到组织中，并且不对电极金属造成显着腐蚀。这两种效应都取决于电极工作时的电荷密度。在将新设计的多通道刺激器投入使用时，只有在确定了操作刺激强度后才能知道电荷密度。即使如此，除非刺激器被安排遥测它正在做什么，否则获得的任何电荷密度数据都具有估计的特征，而不是测量的特征。第一个伦敦 Mk。 V 刺激器用于使截瘫妇女能够站起来。本说明提供了所用 Pt-Ir 电极的平均电荷密度和腐蚀速率的估计。这些都在我们认为普遍认为安全的限度内。
The electrodes of an implanted stimulator must be operated in such a way that the task of converting an electron current in metal to an ion current in tissue is achieved without release of noxious chemical species into the tissue, and without significant corrosion of the electrode metal. Both these effects depend on the charge density at which the electrodes are operated. In bringing a newly designed multichannel stimulator into service, the charge densities can only be known when the operating stimulus strengths have been determined. Even then, unless the stimulator is arranged to telemeter out what it is doing, any charge-density figures obtained have the character of estimates, rather than measurements. The first London Mk. V stimulator is used to enable a paraplegic woman to stand up. This note provides estimates of the average charge density and corrosion rate for the Pt--Ir electrodes used. These fall within limits which we believe to be generally accepted as safe.