Active positioning device for a perimodiolar cochlear electrode array

  title={Active positioning device for a perimodiolar cochlear electrode array},
  author={B.Y. Arcand and Pamela T. Bhatti and Niyati Butala and Jianbai Wang and Craig Friedrich and Kensall D. Wise},
  journal={Microsystem Technologies},
The authors report on an actuated positioning device for a cochlear prosthesis insertion procedure. The device consists of multiple high-aspect ratio fluidic actuator chambers integrated with a high-density silicon cochlear electrode array and manufactured in a tapered-helix form. Actuation chambers with cross-sectional sizes as small as 40 × 200 μm and lengths of 30 mm have been fabricated using flexible polymers. The device will allow for low-resistance basilar insertion of a stimulating… 
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A modiolus-hugging thin-film electrode array is being developed for a cochlear prosthesis. The array contains embedded sensors for position and wall contact in order to minimize tissue damage during
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  • J. Wang, K. Wise
  • Engineering
    Journal of Microelectromechanical Systems
  • 2008
A hybrid electrode array has been developed for use in an implantable MEMS-based cochlear prosthesis intended to restore hearing to the profoundly deaf. The array provides high-density stimulation
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A thin-film electrode array with integrated position sensors has been developed for a cochlear prosthesis. The array is designed to minimize tissue damage during array insertion and achieve deep
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The results indicate that the risk of intracochlear trauma can be reduced if the specific curling behavior of the electrode carrier is incorporated into the insertion algorithm.
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A magnetic guidance concept in which a magnetically tipped cochlear implant is guided as it is inserted into the cochlea is proposed, and it is concluded that scale–down effects are negligible but the magnet dimensions should be increased by approximately four times.
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The concept of enhancing a Parylene TFEA with Kapton tape as a simpler carrier for cochlear insertion has been proved to be feasible and indicated that even the T FEA is ultra-flexible and that its bending stiffness should not be neglected in the design or selection of its carrier.


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The preformed spiral array of the Clarion device allowed deeper electrode insertion compared to the Nucleus-22 device, however, depth of insertion did not translate into better pitch placement and open-set speech discrimination scores in either group of implantees.
Multichannel intracochlear electrodes: Mechanism of insertion trauma
Fresh human temporal bone preparations were created to allow direct intracochlear observation during round window insertion of a free‐fitting multichannel intrac Cochlear electrode array, and the path taken by the electrode, point of first resistance, and any resulting damage were documented.
The Importance of Human Cochlear Anatomy for the Results of Modiolus-Hugging Multichannel Cochlear Implants
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The clinical success of cochlear implantation in humans and the favorable results with modiolus-hugging devices depend on the anatomy of the human cochlea.
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Three conceptually safe methods of injecting charge from a noble metal into tissue: modification of the electrical double layer at the interface and coupling via either of two symmetrical surface-layer oxidation-reduction processes.
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Theory of Elastic Stability
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