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Articles linked to this work by shared authors, journal, and citation graph.

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Estimating Performance Using Tonotopic Measurements of Intracochlear Electrocochleography: Comparison of Lateral Wall and Perimodiolar Arrays.

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Validating an Evoked Potential Platform for Electrocochleography During Cochlear Implantation.

Jordan J Varghese1, Matthew A Shew1, Amit Walia1

  • 1Department of Otolaryngology - Head and Neck Surgery, Washington University School of Medicine, St. Louis, Missouri, U.S.A.

The Laryngoscope
|August 27, 2024
PubMed
Summary
This summary is machine-generated.

The Intelligent Hearing Systems (IHS) Duet AEP machine effectively validates electrocochleography (ECochG) for cochlear implant (CI) patients, correlating well with established systems. This finding supports its use in predicting CI outcomes.

Keywords:
ECochGcochlear implantationcochlear implantsextracochlear electrocochleographyintraoperative electrocochleography

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Area of Science:

  • Audiology
  • Otoelectronic Engineering

Background:

  • Cochlear implantation (CI) is a vital treatment for severe to profound hearing loss.
  • Accurate preoperative assessment of inner ear function is crucial for predicting CI outcomes.
  • Electrocochleography (ECochG) measures the electrophysiological response of the cochlea.

Purpose of the Study:

  • To validate the electrocochleography (ECochG) measurements obtained from an Auditory Evoked Potential (AEP) machine against a dedicated cochlear implant (CI) manufacturer's ECochG system.
  • To assess the reliability of the Intelligent Hearing Systems (IHS) Duet AEP machine for intraoperative ECochG in CI candidates.

Main Methods:

  • An intraoperative validation study was conducted at a tertiary referral center involving adult and pediatric patients undergoing CI surgery.
  • Extracochlear ECochG was recorded simultaneously using the IHS Duet AEP machine and the Cochlear Corporation (CC) ECochG platform.
  • Tone-bursts stimuli (250 Hz to 2 kHz) were used, and Fast Fourier Transform (FFT) analysis was applied to ECochG waveforms to calculate total response (ECochG-TR). Pearson's correlation assessed the relationship between the two systems.

Main Results:

  • Thirty patients were enrolled, with a mean age of 67 years and significant preoperative hearing loss (PTA: 87.4 dB HL) and word recognition scores (WRS: 17.0%).
  • A strong positive correlation (r=0.905) was found between ECochG-TR values obtained from the IHS system and the CC system.
  • Feasibility evaluation in four patients using transtympanic ECochG with the IHS system yielded similar promising responses.

Conclusions:

  • Extracochlear ECochG measurements have demonstrated predictive value for CI speech perception performance.
  • The IHS Duet AEP machine is a validated tool for measuring extracochlear ECochG in the cochlear implant population.
  • Future research will focus on utilizing the IHS system for transtympanic ECochG to enhance preoperative prediction of CI outcomes.