Results 221 to 230 of about 53,242 (267)

Management of Cochlear Implant Electrode Migration

Otology & Neurotology, 2016
The present study reviewed a cochlear implant (CI) patient population after surgery, which received a free-fitting electrode carrier designed for hearing preservation. The aim was to determine the rate of electrode migration of the CI electrodes and present clinical and surgical implications.Retrospective patient review.Tertiary referral university ...
Tobias, Rader, Uwe, Baumann, Timo, Stöver, Tobias, Weissgerber, Youssef, Adel, Martin, Leinung, Silke, Helbig   +6 more
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Electrode migration after cochlear implantation

Cochlear Implants International, 2020
Objective: To investigate impedance change of cochlear implant (CI) electrodes from CochlearTM in patients with straight and precurved electrodes, and to determine if impedance change of the basal electrodes are indicative for cochlear electrode migration. Methods: Retrospective case series at an academic tertiary referral center.
von Mitzlaff, Christian, Dalbert, Adrian, Winklhofer, Sebastian, Veraguth, Dorothe, Huber, Alexander, Röösli, Christof   +5 more
openaire   +4 more sources

Study of power generating implantable electrodes

Medical & Biological Engineering, 1968
Approximately 50–75 μW (microwatts) of electrical power can be obtained from an implantable platinum-black aluminum electrochemical cell. The implantations have been conducted in twelve rabbits for periods up to 200 days. The intensity of the initial tissue reaction and accumulation of insoluble aluminum oxidation products appear to be the factors ...
H, Massie, P, Racine, R, Pasker, A W, Hahn, H H, Sun   +4 more
openaire   +2 more sources

Implanted electrodes for multi-month EEG

2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2014
An implanted electroencephalogram (EEG) recorder would help diagnose infrequent seizure-like events. A proof-of-concept study quantified the electrical characteristics of the electrodes planned for the proposed recorder. The electrodes were implanted in an ovine model for eight weeks. Electrode impedance was less than 800 Ohms throughout the study.
Thomas Jochum, Susannah Engdahl, Brad J. Kolls, Patrick D. Wolf   +3 more
openaire   +2 more sources

Evaluation of Electrode Configurations in Cerebellar Implants

Stereotactic and Functional Neurosurgery, 1977
Capacitively coupled currents of 100 Hz, 0.25 msec duration, were applied to multielectrode arrays implanted upon the superior and posterior surfaces of the chimpanzee cerebellum. The current required for 90% reduction in the amplitude of the evoked potential was inversely proportional to the number of electrodes upon the cerebellar surface. A study of
A, Sances, S J, Larson, J, Myklebust, T, Swiontek, E A, Millar, J F, Cusick, D C, Hemmy, R, Jodat, J, Ackmann   +8 more
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Chronically Implanted Polarographic Electrodes

Journal of Applied Physiology, 1958
Insulated metal polarographic cathodes were permanently implanted in the brains of cats, allowing continuous recording of oxygen availability.
L C, CLARK, G, MISRAHY, R P, FOX
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Electrode Migration After Cochlear Implantation

Otology & Neurotology, 2008
To review the occurrence of electrode migration after cochlear implantation.Review of public database and retrospective case series.Tertiary academic referral center, ambulatory.Retrospective review of electrode migration reported in association with the US Food and Drug Administration Manufacturer and User Facility Device Experience database and a ...
Sarah S, Connell, Thomas J, Balkany, Annelle V, Hodges, Fred F, Telischi, Simon I, Angeli, Adrien A, Eshraghi   +5 more
openaire   +2 more sources

Electrode placements for cochlear implants: A review

British Journal of Audiology, 1990
Of the variety of different sites that have been proposed and used for cochlear implants, only two are now seeing widespread use. For single-channel electrodes, it appears that a placement at the round window, or just inside it, leads to no disadvantages (and perhaps some advantages) over deeper insertions.
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The cochlear implant electrode–pitch function

Hearing Research, 2006
The cochlear frequency-place function in normal hearing ears has been found to be an exponential relationship in a wide variety of species [D.D. Greenwood, J. Acoust. Soc. Am. 87 (1990) 2592-2605]. Although it seems reasonable to assume a similar function for electrical stimulation by means of an intra-cochlear electrode array, the exact frequency ...
Uwe, Baumann, Andrea, Nobbe
openaire   +2 more sources

Flexible fibrous electrodes for implantable biosensing

Nanoscale
This review explores advancements, applications, challenges, and future prospects of flexible fibrous electrodes for implantable biosensing, highlighting their potential in biomedical monitoring and human–machine interfaces. Images reproduced with permission, full details in paper.
Hanfei Li, Chenyang Li, Hang Zhao, Qingsong Li, Yang Zhao, Jianhong Gong, Guanglin Li, Huan Yu, Qiong Tian, Zhiyuan Liu, Fei Han   +10 more
openaire   +2 more sources