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Related Experiment Video

Updated: May 10, 2026

The Miniature Pig: A Large Animal Model for Cochlear Implant Research
06:16

The Miniature Pig: A Large Animal Model for Cochlear Implant Research

Published on: July 28, 2022

Modiolus-hugging intracochlear electrode array with shape memory alloy.

Kyou Sik Min1, Sang Beom Jun, Yoon Seob Lim

  • 1School of Electrical Engineering & Computer Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 110-742, Republic of Korea.

Computational and Mathematical Methods in Medicine
|June 14, 2013
PubMed
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This study introduces a novel shape-memory-alloy (SMA) embedded cochlear implant electrode. The SMA enables the electrode to curve and hug the modiolus, improving electrical stimulation efficiency for hearing restoration.

Area of Science:

  • Biomedical Engineering
  • Neurosurgery
  • Materials Science

Background:

  • The distance between spiral ganglia and cochlear implant electrodes impacts stimulation efficiency.
  • Current electrode arrays may not optimally conform to the cochlea's modiolus, potentially limiting performance.

Purpose of the Study:

  • To develop and evaluate a shape-memory-alloy (SMA) embedded electrode array for cochlear implants.
  • To achieve a modiolus-hugging configuration for enhanced electrical stimulation.

Main Methods:

  • Fabrication of an eight-channel ball-type electrode array with an embedded titanium-nickel SMA backbone.
  • Demonstration of shape change in a human cochlear model using resistive heating.
  • 3D finite element analysis to assess insertion safety and contact pressures.

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Related Experiment Videos

Last Updated: May 10, 2026

The Miniature Pig: A Large Animal Model for Cochlear Implant Research
06:16

The Miniature Pig: A Large Animal Model for Cochlear Implant Research

Published on: July 28, 2022

Chronic Implantation of Multiple Flexible Polymer Electrode Arrays
08:54

Chronic Implantation of Multiple Flexible Polymer Electrode Arrays

Published on: October 4, 2019

Spiral Ganglion Neuron Explant Culture and Electrophysiology on Multi Electrode Arrays
07:51

Spiral Ganglion Neuron Explant Culture and Electrophysiology on Multi Electrode Arrays

Published on: October 19, 2016

Main Results:

  • The SMA-embedded electrode successfully adopted a curved, modiolus-hugging shape.
  • Finite element analysis indicated safe insertion and acceptable contact pressures.
  • The electrode demonstrated functional and mechanical feasibility.

Conclusions:

  • SMA-embedded electrodes offer a promising approach for improving cochlear implant performance.
  • The modiolus-hugging design has the potential to enhance electrical stimulation efficiency and spatial selectivity.
  • This technology shows feasibility for clinical application in hearing restoration.