Impact of Two Visualization Methods for Electrocochleographic Potentials on Hearing and Vestibular Function During...

Area of Science:

• Otolaryngology
• Neurosurgery
• Medical Visualization

Background:

• Cochlear implantation aims to restore hearing but carries risks to residual hearing and vestibular function.
• Visualizing electrocochleographic (ECochG) potentials during surgery may improve outcomes.
• This study compares two ECochG visualization methods: a graph and a pre-interpreted arrow format.

Purpose of the Study:

• To evaluate the impact of two ECochG visualization methods on residual hearing preservation after cochlear implantation.
• To assess the effect of these visualization methods on postoperative vestibular function.
• To compare the subjective surgical workload associated with each visualization method.

Main Methods:

• 31 patients undergoing cochlear implant surgery were randomized to either graph or arrow ECochG visualization.
• Residual hearing was assessed audiometrically.
• Vestibular function was evaluated using the video head impulse test and dizziness handicap inventory; surgeon workload was measured with the NASA-Task Load Index.

Main Results:

• No significant differences were found between the visualization methods regarding residual hearing preservation.
• Postoperative dizziness and ECochG parameters (e.g., amplitude) did not differ significantly between groups.
• Surgeon workload was comparable across both visualization methods.

Conclusions:

• Both ECochG visualization methods are equivalent for preserving cochlear structures and do not increase surgeon workload.
• Simplified ECochG interpretation may aid less experienced surgeons in performing atraumatic insertions with consistent outcomes.