Study of Hearing Preservation Using Intraoperative Electrocochleography During Cochlear Implant Surgery in Adults with Sensorineural Hearing Loss

What this Trial Is About

Researchers are investigating the role of an intraoperative hearing monitoring system called electrocochleography ECochG in preserving residual hearing during cochlear implant CI surgery. This randomized multi-center clinical trial focuses on adults with bilateral sensorineural hearing loss who face the challenge of losing residual hearing as a result of CI surgery. The study aims to understand how ECochG monitoring might reduce hearing loss during implantation and to evaluate benefits of combined hearing from hearing aids and cochlear implants compared to electric-only stimulation. Participants are randomly assigned to one of two groups. In the experimental group, surgeons use ECochG monitoring during CI surgery by placing a device coil and sound applicator to provide live feedback, allowing adjustments during electrode insertion to minimize trauma and preserve hearing. The control group undergoes standard CI surgery without ECochG monitoring but with adherence to soft surgical principles to enhance hearing preservation. Full electrode insertion is performed in the control group as per usual care. During the study, participants undergo assessments at 3, 6, 12, and 24 months to measure hearing preservation advantages. Researchers will evaluate speech perception and quality of life related to hearing outcomes. Participants complete testing and study visits, and surgeons monitor intraoperative feedback in the experimental group. The total study duration includes these follow-up periods to understand long-term hearing preservation effects after CI surgery.

Clinical Utility of Residual Hearing in the Cochlear Implant Ear