Study of Cochlear Implantation After Gamma Knife Radiosurgery for Vestibular Schwannoma and Its Effect on Hearing Recovery Using eABR

What this Trial Is About

This research aims to evaluate cochlear implantation in patients who have undergone radiosurgery for vestibular schwannoma, a condition often leading to hearing loss. The study focuses on assessing the relationship between electrically evoked auditory brainstem response eABR measurements and postoperative hearing outcomes, particularly speech understanding using cochlear implants. It is an observational pilot study that helps determine if cochlear implantation is feasible and beneficial after radiosurgery, especially when hearing loss progresses on the opposite side. Participants will undergo extensive audiometric testing and eABR measurements before and during cochlear implantation surgery. The eABR results, which are not considered part of the study intervention, will be categorized into good, weak, or no response groups. Researchers will then correlate these eABR responses with postoperative speech understanding measured by the Freiburger monosyllables test. During the study, participants will be evaluated through hearing tests and eABR recordings preoperatively and intraoperatively. The primary outcome measure is the correlation between eABR results and hearing performance two years after cochlear implantation. The study will monitor participants to observe these outcomes and gather data to better understand hearing rehabilitation after vestibular schwannoma radiosurgery. The total duration of follow-up and further safety monitoring details are not specified.

Cochlear Implantation After Gamma Knife Radiosurgery with EABR and Correlation to Postoperative Hearing Results - a Pilot Study