Charge recovery during concurrent stimulation for a vision prosthesis

M. Mohd Addi, S. Dokos, P. J. Preston, N. Dommel, Y. T. Wong, N. H. Lovell

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

4 Citations (Scopus)

Abstract

Parallel or concurrent stimulation in an epiretinal neuroprosthesis is likely necessary in order to deliver sufficient phosphenes for effective vision. Important issues with concurrent stimulation are the effect of current distribution which introduces current leakage or 'cross talk' between adjacent electrodes and charge recovery which determines balanced charge being delivered/recovered at each electrode from the previous phase. In this paper, we present the effect of concurrent stimulation of two hexagonally arranged platinum electrode arrays on charge recovery. Balanced and imbalanced (unequal) currents were delivered to the hexagonal arrays when they were immersed in physiological saline. Both simulation and experimental results revealed that charge was not recovered at individual electrodes, particularly when imbalanced currents were delivered. However, total charge injected to both hexagonal arrays was recovered.

Original languageEnglish
Title of host publicationProceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages1797-1800
Number of pages4
ISBN (Print)9781424418152
Publication statusPublished - 1 Dec 2008
Externally publishedYes
Event30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - Vancouver, BC, Canada
Duration: 20 Aug 200825 Aug 2008

Publication series

NameProceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology"

Conference

Conference30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08
CountryCanada
CityVancouver, BC
Period20/08/0825/08/08

Cite this

Addi, M. M., Dokos, S., Preston, P. J., Dommel, N., Wong, Y. T., & Lovell, N. H. (2008). Charge recovery during concurrent stimulation for a vision prosthesis. In Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 (pp. 1797-1800). [4649527] (Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology"). IEEE, Institute of Electrical and Electronics Engineers.
Addi, M. Mohd ; Dokos, S. ; Preston, P. J. ; Dommel, N. ; Wong, Y. T. ; Lovell, N. H. / Charge recovery during concurrent stimulation for a vision prosthesis. Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08. IEEE, Institute of Electrical and Electronics Engineers, 2008. pp. 1797-1800 (Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology").
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title = "Charge recovery during concurrent stimulation for a vision prosthesis",
abstract = "Parallel or concurrent stimulation in an epiretinal neuroprosthesis is likely necessary in order to deliver sufficient phosphenes for effective vision. Important issues with concurrent stimulation are the effect of current distribution which introduces current leakage or 'cross talk' between adjacent electrodes and charge recovery which determines balanced charge being delivered/recovered at each electrode from the previous phase. In this paper, we present the effect of concurrent stimulation of two hexagonally arranged platinum electrode arrays on charge recovery. Balanced and imbalanced (unequal) currents were delivered to the hexagonal arrays when they were immersed in physiological saline. Both simulation and experimental results revealed that charge was not recovered at individual electrodes, particularly when imbalanced currents were delivered. However, total charge injected to both hexagonal arrays was recovered.",
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Addi, MM, Dokos, S, Preston, PJ, Dommel, N, Wong, YT & Lovell, NH 2008, Charge recovery during concurrent stimulation for a vision prosthesis. in Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08., 4649527, Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology", IEEE, Institute of Electrical and Electronics Engineers, pp. 1797-1800, 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08, Vancouver, BC, Canada, 20/08/08.

Charge recovery during concurrent stimulation for a vision prosthesis. / Addi, M. Mohd; Dokos, S.; Preston, P. J.; Dommel, N.; Wong, Y. T.; Lovell, N. H.

Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08. IEEE, Institute of Electrical and Electronics Engineers, 2008. p. 1797-1800 4649527 (Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology").

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

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Addi MM, Dokos S, Preston PJ, Dommel N, Wong YT, Lovell NH. Charge recovery during concurrent stimulation for a vision prosthesis. In Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08. IEEE, Institute of Electrical and Electronics Engineers. 2008. p. 1797-1800. 4649527. (Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology").