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Development and evaluation of the modiolar research array--multi-centre collaborative study in human temporal bones.

Robert J S Briggs1, Michael Tykocinski, Roland Lazsig

  • 1University of Melbourne and HEARing CRC, Melbourne, Australia. rjbriggs@netspace.net.au

Cochlear Implants International
|September 16, 2011
PubMed
Summary

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This summary is machine-generated.

This study developed a novel, thin perimodiolar cochlear implant electrode array (MRA) using a collaborative approach. The MRA demonstrated feasibility for human use with minimal trauma and excellent perimodiolar placement.

Area of Science:

  • Otolaryngology
  • Biomedical Engineering
  • Neurosurgery

Background:

  • Cochlear implantation aims to restore hearing by stimulating the auditory nerve.
  • Developing advanced electrode arrays is crucial for improving cochlear implant efficacy.
  • Perimodiolar electrode placement is associated with better outcomes.

Purpose of the Study:

  • To develop and refine a prototype thin perimodiolar cochlear implant electrode array.
  • To assess the feasibility of using this novel electrode array in human subjects.
  • To address key design challenges through systematic evaluation.

Main Methods:

  • Multi-center temporal bone insertion studies involving 140 electrode insertions in 85 human temporal bones.
  • Utilized a novel external sheath for electrode insertion, avoiding an internal stylet.

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  • Employed techniques including histology, microfluoroscopy, and force analysis to evaluate trauma and placement.

    • Main Results:

    • Initial designs showed electrode rotation and tip fold-over, which were mitigated by design modifications.
    • The final modiolar research array (MRA) design demonstrated minimal intra-cochlear trauma.
    • Excellent perimodiolar placement and negligible force on cochlear structures were achieved.

    Conclusions:

    • The modiolar research array (MRA) is a novel, thin perimodiolar prototype electrode array developed through a systematic, collaborative process.
    • The sheath design did not cause additional trauma and accommodated anatomical variations.
    • The MRA can be safely inserted and removed, showing promise for clinical application.