Study of the Carrier-Aided Thin Film Electrode Array Design for Cochlear Insertion

Xu, Yuchen; Luo, Chuan; Zeng, Fan‐Gang; Middlebrooks, John C.; Lin, Harrison W.; You, Zheng

doi:10.3390/mi9050206

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…To stiffen Parylene-C electrode arrays, Kapton tape was used as an electrode array carrier material for long-term implants. The incorporation of Kapton tape increased the bending stiffness of the Parylene-C array by 60% [ 90 ]. In addition to stiffness, the size of electrode arrays affects the flexibility of the implant [ 91 ].…”

Section: Electrode and Electrode Array Designmentioning

confidence: 99%

Recent Advances in Cochlear Implant Electrode Array Design Parameters

et al. 2022

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Cochlear implants are neural implant devices that aim to restore hearing in patients with severe sensorineural hearing impairment. Here, the main goal is to successfully place the electrode array in the cochlea to stimulate the auditory nerves through bypassing damaged hair cells. Several electrode and electrode array parameters affect the success of this technique, but, undoubtedly, the most important one is related to electrodes, which are used for nerve stimulation. In this paper, we provide a comprehensive resource on the electrodes currently being used in cochlear implant devices. Electrode materials, shape, and the effect of spacing between electrodes on the stimulation, stiffness, and flexibility of electrode-carrying arrays are discussed. The use of sensors and the electrical, mechanical, and electrochemical properties of electrode arrays are examined. A large library of preferred electrodes is reviewed, and recent progress in electrode design parameters is analyzed. Finally, the limitations and challenges of the current technology are discussed along with a proposal of future directions in the field.

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Section: Electrode and Electrode Array Designmentioning

confidence: 99%

Recent Advances in Cochlear Implant Electrode Array Design Parameters

et al. 2022

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“…It was shown that parylene-based implants are robust under surgical conditions and deliver efficient stimulation in in vivo testing ( 140 , 161 – 163 ). Parylene is used as both substrate and insulating material for cochlear implants and cortical stimulation ( 141 , 164 ). Minnikanti et al ( 165 ) performed a comprehensive study to examine parylene C long-term stability, demonstrating that Al 2 O 3 coating significantly enhances insulation properties and improves lifetime of neural interfaces for chronic implantation ( 166 ).…”

Section: Flexible Substratesmentioning

confidence: 99%

Soft Devices for High-Resolution Neuro-Stimulation: The Interplay Between Low-Rigidity and Resolution

Vėbraitė

Hanein

2021

Front. Med. Technol.

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The field of neurostimulation has evolved over the last few decades from a crude, low-resolution approach to a highly sophisticated methodology entailing the use of state-of-the-art technologies. Neurostimulation has been tested for a growing number of neurological applications, demonstrating great promise and attracting growing attention in both academia and industry. Despite tremendous progress, long-term stability of the implants, their large dimensions, their rigidity and the methods of their introduction and anchoring to sensitive neural tissue remain challenging. The purpose of this review is to provide a concise introduction to the field of high-resolution neurostimulation from a technological perspective and to focus on opportunities stemming from developments in materials sciences and engineering to reduce device rigidity while optimizing electrode small dimensions. We discuss how these factors may contribute to smaller, lighter, softer and higher electrode density devices.

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“…Two flexible arrays developed for measuring pressure [6] or providing electrical signals to cochlear implants [7] are reported. In the case of cochlear implants, Parylene-C again is the polymer of choice, but in this work it is reinforced with Kapton to aid in insertion of sensors into tissues.…”

mentioning

confidence: 99%