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Related Experiment Video

Updated: Jun 20, 2026

Performing Intracochlear Electrocochleography During Cochlear Implantation
09:10

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Application of Spectral Domain Optical Coherence Tomography To Guide Cochlear Implant Electrode Array.

Pawina Jiramongkolchai, Marcello M Amaral, Ratul Paul

    Biorxiv : the Preprint Server for Biology
    |June 12, 2025
    PubMed
    Summary
    This summary is machine-generated.

    A custom spectral domain optical coherence tomography (SD-OCT) system provides real-time surgical guidance for cochlear implant electrode array (EA) placement. This technology minimizes trauma and improves hearing outcomes by visualizing the cochlear microanatomy during surgery.

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    Last Updated: Jun 20, 2026

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    Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion
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    Published on: January 17, 2025

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    Area of Science:

    • Biomedical Engineering
    • Otolaryngology
    • Medical Imaging

    Background:

    • Cochlear implant electrode array (EA) insertion is currently a blind procedure relying on tactile feedback.
    • Surgical trauma during cochlear implantation can lead to poor speech performance and loss of residual hearing.
    • Optical coherence tomography (OCT) offers high-resolution, non-invasive real-time imaging, unlike CT and MRI.

    Purpose of the Study:

    • To develop and evaluate a custom spectral domain optical coherence tomography (SD-OCT) platform for real-time surgical guidance.
    • To assess the potential of SD-OCT in visualizing cochlear microanatomy and guiding EA insertion.
    • To reduce cochlear implant trauma and improve surgical outcomes.

    Main Methods:

    • A custom-built SD-OCT system was utilized to image cochlear microanatomy in mice and human cadaveric temporal bones.
    • The SD-OCT system was employed to guide a mock EA in real-time through the round window in human cadaveric temporal bones.
    • Sequential B-scans were used for navigation during EA advancement.

    Main Results:

    • High-resolution (< 5.0 μm) images of cochlear microanatomy were acquired with high sensitivity (∼104 dB).
    • Real-time OCT B-scans reliably guided EA placement through the scala tympani in cadaveric temporal bones.
    • The custom system enabled visualization critical for navigating the cochlea.

    Conclusions:

    • The custom SD-OCT platform provides high-resolution, real-time visualization of cochlear microanatomy.
    • This technology can serve as a surgical image guidance tool for cochlear implant EA insertion.
    • SD-OCT has the potential to minimize EA trauma and advance understanding of cochlear pathophysiology.