Journal ArticleDOI
On the Thermal Elevation of a 60-Electrode Epiretinal Prosthesis for the Blind
V. Singh,Arup Roy,Richard G. Castro,K. McClure,R. Dai,Rajat Agrawal,Robert J. Greenberg,James D. Weiland,Mark S. Humayun,Gianluca Lazzi +9 more
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TLDR
A novel simple finite difference scheme combining the explicit and the alternating-direction implicit (ADI) method has been developed and validated with existing methods, and solutions of the bioheat equation were obtained for different placements of the implant.Abstract:
In this paper, the thermal elevation in the human body due to the operation of a dual-unit epiretinal prosthesis to restore partial vision to the blind affected by irreversible retinal degeneration is presented. An accurate computational model of a 60-electrode device dissipating 97 mW power, currently under clinical trials is developed and positioned in a 0.25 mm resolution, heterogeneous model of the human head to resemble actual conditions of operation of the prosthesis. A novel simple finite difference scheme combining the explicit and the alternating-direction implicit (ADI) method has been developed and validated with existing methods. Simulation speed improvement up to 11 times was obtained for the the head model considered in this work with very good accuracy. Using this method, solutions of the bioheat equation were obtained for different placements of the implant. Comparison with in-vivo experimental measurements showed good agreement.read more
Citations
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On the Design of Efficient Multi-Coil Telemetry System for Biomedical Implants
TL;DR: A novel multi-coil technique (using more than two coils) for wireless power and data transfer is considered to help overcoming this limitation and a figure of merit for telemetry systems is defined to quantify the overall telemetry system performance.
Journal ArticleDOI
On the Design of Microfluidic Implant Coil for Flexible Telemetry System
Amit Qusba,Anil Kumar RamRakhyani,Ju-Hee So,Gerard J. Hayes,Michael D. Dickey,Gianluca Lazzi +5 more
TL;DR: In this article, a soft, flexible, coil fabricated by means of a liquid metal alloy encased in a biocompatible elastomeric substrate for operation in a telemetry system, primarily for application to biomedical implantable devices.
Journal ArticleDOI
Safety Ensuring Retinal Prosthesis With Precise Charge Balance and Low Power Consumption
TL;DR: A safety ensuring neuro-stimulator for retinal vision prostheses, featuring precise charge balancing capability and low power consumption, using a 0.35 μm HV (high voltage) CMOS process.
Journal ArticleDOI
The development of neural stimulators: a review of preclinical safety and efficacy studies.
Robert K. Shepherd,Joel Villalobos,Joel Villalobos,Owen Burns,David A X Nayagam,David A X Nayagam +5 more
TL;DR: The present review examines basic design principles associated with the development of a safe neural stimulator and describes the suite of preclinical safety studies that need to be considered when taking a device to clinical trial.
Journal ArticleDOI
An Approach to Rapid Calculation of Temperature Change in Tissue Using Spatial Filters to Approximate Effects of Thermal Conduction
TL;DR: Results of the proposed method are in reasonable agreement with those of the FD approach, with about 15% difference in the calculated maximum temperature increase, but are calculated in a fraction of the time, requiring less than 2% of the calculation time for theFD approach in the cases evaluated.
References
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Book
Textbook of Medical Physiology
Arthur C. Guyton,John E. Hall +1 more
TL;DR: Textbook of medical physiology , Textbook ofmedical physiology , کتابخانه دیجیتال جندی شاپور اهواز
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Textbook of Medical Physiology
TL;DR: Textbook of medical physiology, Textbook of Medical Physiology, this paper, textbook of medicine, textbooks of medical science, text book of medical literature, textbook medical physiology.
Journal Article
Guidelines for limiting exposure to time-varying electric, magnetic, and electromagnetic fields (up to 300 GHz)
TL;DR: The International Commission on Non-Ionizing Radiation Protection (ICNIRP)—was established as a successor to the IRPA/INIRC, which developed a number of health criteria documents on NIR as part of WHO’s Environmental Health Criteria Programme, sponsored by the United Nations Environment Programme (UNEP).
Journal ArticleDOI
Analysis of Tissue and Arterial Blood Temperatures in the Resting Human Forearm
Journal ArticleDOI
Will retinal implants restore vision
TL;DR: A number of research groups are developing electrical implants that can be attached directly to the retina in an attempt to restore vision to patients suffering from retinal degeneration, despite promising results in animal experiments.