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Updated: Jun 21, 2026

Performing Intracochlear Electrocochleography During Cochlear Implantation
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Performing Intracochlear Electrocochleography During Cochlear Implantation

Published on: March 8, 2022

Non-invasive Wet Electrocochleography.

Federico Carpi1, Serena Migliorini

  • 1Interdepartmental Research Centre "E. Piaggio," School of Engineering, University of Pisa, Pisa 56100, Italy. f.carpi@ing.unipi.it

IEEE Transactions on Bio-Medical Engineering
|July 17, 2009
PubMed
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A new, noninvasive electrocochleography (ECochG) technique uses a conductive liquid, avoiding direct contact with the tympanic membrane. This comfortable and safe method effectively detects ECochG potentials, offering a promising alternative for auditory assessments.

Area of Science:

  • Audiology
  • Biomedical Engineering
  • Neuroscience

Background:

  • Conventional electrocochleography (ECochG) methods utilize transtympanic or tympanic/extratympanic electrodes.
  • These existing techniques can be invasive or cause discomfort due to close contact with the tympanic membrane.

Purpose of the Study:

  • To introduce and evaluate a novel, noninvasive ECochG technique.
  • To assess the feasibility of using a conductive liquid as an interface for ECochG potential detection.

Main Methods:

  • A conductive liquid was inserted into the ear canal to serve as an electrical interface.
  • An external electrode was used without direct contact with the tympanic membrane.
  • The technique was tested on ten volunteers using single-click auditory stimuli.

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Recording Human Electrocorticographic (ECoG) Signals for Neuroscientific Research and Real-time Functional Cortical Mapping
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Recording Human Electrocorticographic (ECoG) Signals for Neuroscientific Research and Real-time Functional Cortical Mapping

Published on: June 26, 2012

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Last Updated: Jun 21, 2026

Performing Intracochlear Electrocochleography During Cochlear Implantation
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Recording Human Electrocorticographic (ECoG) Signals for Neuroscientific Research and Real-time Functional Cortical Mapping
13:32

Recording Human Electrocorticographic (ECoG) Signals for Neuroscientific Research and Real-time Functional Cortical Mapping

Published on: June 26, 2012

Main Results:

  • The noninvasive technique successfully detected ECochG potentials with accurate morphology and significant amplitude.
  • The method proved comfortable, safe, and easy to perform, without requiring sedation or anesthesia.
  • Improved contact stability and reduced impedance were observed, with tolerance to minor electrode misplacements.

Conclusions:

  • This liquid-based ECochG technique offers a comfortable and safe noninvasive alternative to conventional methods.
  • It demonstrates potential as a valuable tool in ECochG practice, warranting further investigation.
  • A contraindication includes tympanic perforation, precluding the use of liquid in such cases.