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Microfabrication of an implantable s...

Maghribi, Mariam Nader.

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Microfabrication of an implantable silicone microelectrode array for an epiretinal prosthesis.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Microfabrication of an implantable silicone microelectrode array for an epiretinal prosthesis./
Author:	Maghribi, Mariam Nader.
Description:	205 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-07, Section: B, page: 3388.
Contained By:	Dissertation Abstracts International64-07B.
Subject:	Engineering, Biomedical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3097451

Microfabrication of an implantable silicone microelectrode array for an epiretinal prosthesis.
Maghribi, Mariam Nader.

Microfabrication of an implantable silicone microelectrode array for an epiretinal prosthesis. - 205 p.

Source: Dissertation Abstracts International, Volume: 64-07, Section: B, page: 3388.

Thesis (Ph.D.)--University of California, Davis, 2003.

Millions of people suffering from diseases such as retinitis pigmentosa and macular degeneration are legally blind due to the loss of photoreceptor function. Fortunately a large percentage of the neural cells connected to the photoreceptors remain viable, and electrical stimulation of these cells has been shown to result in visual perception. These findings have generated worldwide efforts to develop a retinal prosthesis device, with the hope of restoring vision. Advances in microfabrication, integrated circuits, and wireless technologies provide the means to reach this challenging goal. This dissertation describes the development of innovative silicone-based microfabrication techniques for producing an implantable microelectrode array. The microelectrode array is a component of an epiretinal prosthesis being developed by a multi-laboratory consortium. This array will serve as the interface between an electronic imaging system and the human eye, directly stimulating retinal neurons via thin film conducting traces.Subjects--Topical Terms:

1017684
Engineering, Biomedical.

Microfabrication of an implantable silicone microelectrode array for an epiretinal prosthesis.
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035 $a (UnM)AAI3097451
035 $a AAI3097451
040 $a UnM $c UnM
100 1 $a Maghribi, Mariam Nader. $3 1945855
245 1 0 $a Microfabrication of an implantable silicone microelectrode array for an epiretinal prosthesis.
300 $a 205 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-07, Section: B, page: 3388.
500 $a Adviser: Dennis Matthews.
502 $a Thesis (Ph.D.)--University of California, Davis, 2003.
520 $a Millions of people suffering from diseases such as retinitis pigmentosa and macular degeneration are legally blind due to the loss of photoreceptor function. Fortunately a large percentage of the neural cells connected to the photoreceptors remain viable, and electrical stimulation of these cells has been shown to result in visual perception. These findings have generated worldwide efforts to develop a retinal prosthesis device, with the hope of restoring vision. Advances in microfabrication, integrated circuits, and wireless technologies provide the means to reach this challenging goal. This dissertation describes the development of innovative silicone-based microfabrication techniques for producing an implantable microelectrode array. The microelectrode array is a component of an epiretinal prosthesis being developed by a multi-laboratory consortium. This array will serve as the interface between an electronic imaging system and the human eye, directly stimulating retinal neurons via thin film conducting traces.
520 $a Because the array is intended as a long-term implant, vital biological and physical design requirements must be met. A retinal implant poses difficult engineering challenges due to the size of the intraocular cavity and the delicate retina. Not only does it have to be biocompatible in terms of cytotoxicity and degradation, but it also has to be structurally biocompatible, with regard to smooth edges and high conformability; basically mimicking the biological tissue. This is vital to minimize stress and prevent physical damage to the retina. Also, the device must be robust to withstand the forces imposed on it during fabrication and implantation. In order to meet these biocompatibility needs, the use of non-conventional microfabrication materials such as silicone is required. This mandates the enhancement of currently available polymer-based fabrication techniques and the development of new microfabrication methods.
520 $a Through an iterative process, devices were designed, fabricated, tested and implanted into a canine eye. Metal traces were embedded within a thin substrate fabricated using poly (dimethyl siloxane) (PDMS), an inert biocompatible elastomeric material with high oxygen permeability and low water permeability. Due to its highly conformable nature, PDMS contacted the curved retinal surface uniformly. Fundamental material characteristics were examined to develop reliable and repeatable fabrication processes.
590 $a School code: 0029.
650 4 $a Engineering, Biomedical. $3 1017684
650 4 $a Health Sciences, Ophthalmology. $3 1019445
690 $a 0541
690 $a 0381
710 2 0 $a University of California, Davis. $3 1018682
773 0 $t Dissertation Abstracts International $g 64-07B.
790 1 0 $a Matthews, Dennis, $e advisor
790 $a 0029
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3097451