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Related Experiment Videos

Auditory performance with simultaneous intracochlear multichannel stimulation.

J L Parkin1, L J Randolph

  • 1Division of Otolaryngology-Head and Neck Surgery, University of Utah School of Medicine, Salt Lake City 84132.

The Laryngoscope
|April 1, 1991
PubMed
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This study evaluated cochlear implant performance in 35 patients using a multichannel monopolar electrode system. Results show significant auditory improvements and good long-term device tolerance.

Area of Science:

  • Audiology
  • Biomedical Engineering
  • Neurosurgery

Background:

  • Cochlear implant technology utilizes diverse sound processing strategies.
  • This study focuses on a specific multichannel monopolar electrode system.

Purpose of the Study:

  • To present auditory performance data from patients with cochlear implants.
  • To assess the long-term tolerance of the percutaneous pedestal.

Main Methods:

  • Auditory data collected from 35 patients implanted between April 1984 and April 1989.
  • Intracochlear insertion of a multichannel monopolar electrode system.
  • Simultaneous input to four electrodes, with signal amplification and routing via a band-pass filter system.

Main Results:

Related Experiment Videos

  • Mean pure-tone hearing thresholds: 500 Hz (29.6 dB), 1000 Hz (23.5 dB), 2000 Hz (25.4 dB), 4000 Hz (32.1 dB), 6000 Hz (42.2 dB).
  • Speech perception: 51.4% of patients scored >60% on CID sentence tests, 40% scored >80%.
  • Percutaneous pedestal well tolerated, with systems in place for 13-15 years.

Conclusions:

  • The multichannel monopolar electrode system provides significant auditory benefits.
  • The percutaneous pedestal demonstrates excellent long-term biocompatibility and patient tolerance.