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Related Experiment Video

Updated: Jun 29, 2025

Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery
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Exploring Trauma Patterns and Contributing Factors With Slim Straight Electrode Array After Cochlear Implantation.

Renato Torres1,2, Hannah Daoudi1,2, Wenxi Gu1,2,3

  • 1Unité Fonctionnelle Implants Auditifs et Explorations Fonctionnelles, Service ORL, GHU Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris (AP-HP)/Sorbonne Université, Paris, France.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|March 27, 2024
PubMed
Summary

Cochlear implant electrode insertion can cause trauma, with 56% of cases showing traumatic patterns. Deeper electrode placement is linked to increased risk, particularly in distal and proximal cochlear regions.

Keywords:
basilar membrane/injuriescochlea/injuriescochlea/pathologyelectrodes, implanted/adverse effectsimaging, 3‐dimensional/methodsrobotics/instrumentation

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Last Updated: Jun 29, 2025

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Area of Science:

  • Otolaryngology
  • Neurosurgery
  • Biomedical Engineering

Background:

  • Cochlear implantation is a common treatment for severe to profound hearing loss.
  • Lateral wall electrode arrays are widely used, but insertion can lead to intracochlear trauma.
  • Understanding trauma patterns is crucial for improving surgical techniques and patient outcomes.

Purpose of the Study:

  • To investigate trauma patterns associated with lateral wall electrode array insertion in cochlear implantation.
  • To identify factors contributing to traumatic insertions, focusing on electrode position relative to cochlear structures.

Main Methods:

  • Retrospective analysis of 106 cochlear implant recipients.
  • Three-dimensional reconstructions to analyze electrode array position (scala tympani, intermediate, scala vestibuli).
  • Comparison of manual and robotic insertion techniques (RobOtol®).

Main Results:

  • 56% of insertions were classified as traumatic.
  • Deeper placement of the first electrode relative to the round window was significantly associated with traumatic insertions (P=0.03).
  • Identified distinct trauma patterns in distal and proximal cochlear regions.

Conclusions:

  • The intermediate electrode position may be associated with basilar membrane lesions.
  • Deeper electrode array placement is an independent risk factor for intracochlear trauma.
  • Gentler insertion techniques and optimized insertion depth may reduce surgical trauma.