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Related Experiment Video

Updated: Jan 22, 2026

Performing Intracochlear Electrocochleography During Cochlear Implantation

Performing Intracochlear Electrocochleography During Cochlear Implantation

Published on: March 8, 2022

Dynamic intracochlear pressure measurement during cochlear implant electrode insertion.

F Ordonez¹, C Riemann¹, S Mueller¹

¹Department of Otolaryngology, Head and Neck Surgery, Klinikum Bielefeld , Bielefeld , Germany.

Acta Oto-Laryngologica

|July 13, 2019

Summary

Measuring intracochlear pressure (ICP) during cochlear implant electrode insertion dynamically reveals increasing pressure with insertion depth. These dynamic ICP changes may have implications for preserving residual hearing.

Keywords:

Intracochlear pressure cochlear implant electrode insertion

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Published on: June 21, 2024

Area of Science:

Otoacoustic emissions
Auditory neurophysiology
Biomedical engineering

Background:

Electrode insertion into the cochlea can induce significant intracochlear pressure (ICP) changes.
Previous studies assessed ICP changes statically, primarily in the cochlear helix.
The functional impact of these pressure changes on residual hearing is a key concern.

Purpose of the Study:

To dynamically measure ICP directly at the cochlear implant electrode during insertion.
To correlate ICP variations with insertion depth and sensor position.
To evaluate the effect of insertion technique on peak ICP.

Main Methods:

Utilized an uncurled cochlear model with a volume equivalent to a human cochlea.
Attached a microfibre pressure sensor to a cochlear implant electrode at two distinct positions.
Inserted the electrode under varying conditions to record dynamic ICP.

Main Results:

Intracochlear pressure (ICP) was observed to increase proportionally with insertion depth.
ICP variations demonstrated a dependency on both insertion depth and sensor position.
Employing an interval insertion technique did not result in a reduction of peak insertion ICP.

Conclusions:

Dynamic ICP measurements at the electrode reveal a pressure increase correlated with insertion depth, differing from static helix measurements.
The observed pressure profiles suggest potential mechanical trauma relevance.
Further investigation is warranted to fully understand the implications of these dynamic ICP changes for cochlear implant surgery and hearing preservation.