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Related Experiment Videos

New Clarion electrode with positioner: insertion studies.

T Lenarz1, J Kuzma, B P Weber

  • 1Department of Otolaryngology, Medical University of Hannover, Germany.

The Annals of Otology, Rhinology & Laryngology. Supplement
|January 5, 2001
PubMed
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A novel universal electrode with a positioner offers safe and easy cochlear implantation. This system improves electrode placement and reduces auditory thresholds, enhancing electrical auditory brain stem response (EABR) and stapedius reflex thresholds.

Area of Science:

  • Otorhinolaryngology
  • Biomedical Engineering
  • Neurosurgery

Background:

  • Cochlear implantation aims to restore hearing by stimulating the auditory nerve.
  • Accurate electrode placement within the cochlea is crucial for effective device performance.
  • Existing electrode designs may present challenges in achieving optimal positioning and minimizing tissue trauma.

Purpose of the Study:

  • To evaluate the safety and efficacy of a new universal electrode array and positioner system.
  • To assess insertion characteristics, tissue trauma, and electrode positioning in human temporal bones.
  • To investigate functional properties in animal models and clinical benefits in human subjects.

Main Methods:

  • Human temporal bone studies for insertion, trauma, and positioning assessment.

Related Experiment Videos

  • Animal studies (cats) to evaluate functional properties like electrical auditory brain stem response (EABR).
  • Intraoperative human studies to determine surgical procedure and electrophysiological benefits.

    • Main Results:

    • The universal electrode and positioner demonstrated ease of insertion without tissue damage in human cadavers.
    • An average insertion depth gain of 180 degrees was achieved with the positioner.
    • Animal studies showed a 6 dB reduction in EABR thresholds with no additional cochlear damage.
    • Human studies revealed significant reductions in EABR and stapedius reflex thresholds, with increased impedances.
    • X-rays confirmed modiolus proximity of the electrode when used with the positioner.

    Conclusions:

    • The new Clarion electrode with positioner is a safe design for achieving modiolus proximity in cochlear implants.
    • Electrophysiological benefits include reduced thresholds and lower power consumption.
    • The system facilitates precise electrode placement, potentially improving hearing outcomes for patients.