Multi-Frequency Electrocochleography and Electrode Scan to Identify Electrode Insertion Trauma during Cochlear...

Area of Science:

• Otolaryngology
• Neuroscience
• Biomedical Engineering

Background:

• Intraoperative electrocochleography (ECOG) monitors cochlear microphonics (CM) during cochlear implant (CI) surgery using low-frequency stimuli.
• Decreased CM amplitude is often misattributed to cochlear trauma, leading to unnecessary electrode manipulation.
• Current methods may inaccurately interpret electrode advancement as trauma, increasing surgical risks.

Purpose of the Study:

• To investigate multi-frequency ECOG for monitoring CM during CI electrode insertion.
• To differentiate mechanisms causing CM amplitude decrease during electrode placement.
• To enhance intraoperative feedback for surgeons during CI procedures.

Main Methods:

• Utilized multi-frequency ECOG to track CM during CI electrode insertion.
• Compared intraoperative CM tracings with electrode scan measurements.
• Analyzed peak CM amplitude differences between placement and scanning to identify CM decrease causes.

Main Results:

• Multi-frequency ECOG provided insights into CM amplitude variations.
• Electrode scan measurements correlated with CM amplitude changes.
• The study identified distinct patterns differentiating electrode advancement from cochlear trauma.

Conclusions:

• Multi-frequency ECOG and electrode scanning can distinguish between CM amplitude decrease mechanisms.
• Accurate differentiation aids in providing appropriate surgical feedback.
• These methods can potentially reduce unnecessary electrode manipulation and associated risks during CI surgery.