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Paper Abstract and Keywords
Presentation 2018-10-20 11:20
Fundamental study on equivalent circuit model for electrochemical characterization of implantable porous electrode used in retinal prosthesis with suprachoroidal transretinal stimulation
Shuhei Nomura (Teikyo Univ/ Kyushu Univ), Hiroyuki Tashiro (Kyushu Univ), Yasuo Terasawa (NIDEK), Jun Ohta (NAIST) MBE2018-31
Abstract (in Japanese) (See Japanese page) 
(in English) Visual prothesis is a medical device that restores lost visual function via electrical stimulation to the visual nervous system using metal stimulation electrodes. Excessive and chronic stimulation via the implanted electrode causes safety and durability problems such as damage to the surrounding tissue and elution of the electrodes. To secure the long-term safety of the stimulation pulses, it is important to understand the changes of the electrode characteristics in vivo.
In this study, we implanted a porous stimulation electrode array in a rabbit’s eyeball and obtained electrochemical impedance of active and inactive electrodes. From the result of equivalent circuit analysis, the characteristics of the porous electrode in the living body can be described by a simple equivalent circuit model containing solution resistances and electric double layer capacities.
Keyword (in Japanese) (See Japanese page) 
(in English) Visual prosthesis / Stimulation electrode / Electrochemical impedance spectroscopy / Equivalent circuit analysis / / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 257, MBE2018-31, pp. 23-28, Oct. 2018.
Paper # MBE2018-31 
Date of Issue 2018-10-13 (MBE) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee NC MBE  
Conference Date 2018-10-19 - 2018-10-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MBE 
Conference Code 2018-10-NC-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Fundamental study on equivalent circuit model for electrochemical characterization of implantable porous electrode used in retinal prosthesis with suprachoroidal transretinal stimulation 
Sub Title (in English)  
Keyword(1) Visual prosthesis  
Keyword(2) Stimulation electrode  
Keyword(3) Electrochemical impedance spectroscopy  
Keyword(4) Equivalent circuit analysis  
1st Author's Name Shuhei Nomura  
1st Author's Affiliation Teikyo University/ Kyushu University (Teikyo Univ/ Kyushu Univ)
2nd Author's Name Hiroyuki Tashiro  
2nd Author's Affiliation Kyushu University (Kyushu Univ)
3rd Author's Name Yasuo Terasawa  
3rd Author's Affiliation NIDEK CO., LTD. (NIDEK)
4th Author's Name Jun Ohta  
4th Author's Affiliation Nara Institute of Science and Technology (NAIST)
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Date Time 2018-10-20 11:20:00 
Presentation Time 25 
Registration for MBE 
Paper # IEICE-MBE2018-31 
Volume (vol) IEICE-118 
Number (no) no.257 
Page pp.23-28 
#Pages IEICE-6 
Date of Issue IEICE-MBE-2018-10-13 

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