Results 161 to 170 of about 58,890 (209)

Percutaneous implantation of cardiac pacemaker electrodes

The American Journal of Cardiology, 1967
Abstract A simple, safe, rapid method for inserting thin, insulated wire electrodes into the right ventricular cavity for artificial pacing of the heart is described. Two fine, insulated Elgiloy wires are introduced percutaneously into the right ventricle from the xiphoid area by using a prethreaded 21 gauge thin-walled needle.
G H, Kodjababian, R E, Gray, R L, Keenan, L T, Iseri   +3 more
openaire   +2 more sources

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

Medialization of electrode array in cochlear implantation

The Journal of Laryngology & Otology, 2000
In the last few years, the main thrust of research into cochlear implantation has centred around the development of advanced multi-channel implants. A new area of development is now concentrating on maximizing the potential of each individual electrode in order to improve the quality of hearing.
S J, Watts, P, Lindsey, M, Hawthorne
openaire   +2 more sources

Self-anchoring electrode for implantable pacemakers

American Heart Journal, 1976
The writers describe a self-anchoring monopolar electrode for use in implantable pacemakers, intended to prevent migration. The device was implanted in 63 patients observed for 36 months, and results are considered very favorable.
O, Fiandra, W, Espasandin, F F, Barbieri, M, Tornaria, L P, Umpierrez, H, Fiandra, D, Fiandra   +6 more
openaire   +2 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
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.
openaire   +2 more sources

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
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