Adult Simultaneous Cochlear Implantation: Local Anesthesia

Abstract

Purpose: Cochlear implant (CI) surgery is conventionally done under general anesthesia (GA). However, many patients are unable to undergo GA due to various reasons, raising the need for an alternative safe option. CI under local anesthesia is feasible and safely done in patients who can't tolerate GA. This approach allows for device fitting immediately after surgery. This study aims to evaluate simultaneous bilateral cochlear implant (BiCI) surgery performed under local anesthesia with sedation in adults. To our knowledge, this is the largest cohort of patients who underwent this approach. Methods: This is a retrospective chart review in a tertiary center. We included all adult patients who underwent simultaneous BiCI under local anesthesia with sedation from 2018 to 2024. The feasibility of BiCI under local anesthesia with sedation was assessed through clinical, surgical, audiological, and patient questionnaire data. Results: Six patients underwent simultaneous BiCI with local anesthetic and sedation. Mean age was 41.7 ± 16.0, comprising 66.7% male and 33.3% female. No intraoperative problems were encountered. All woke up from sedation without any agitation or difficulties. Their recovery was uneventful. No dizziness, nausea, or vomiting were reported. The device was activated immediately postoperatively. Pure tone audiometry, speech reception threshold, and word recognition score were significantly improved. Positive experiences were reported in all patients. Conclusion: Bilateral simultaneous cochlear implantation under local anesthesia in adults is achievable, through a multidisciplinary approach. This approach is a potential alternative option for some patients and could optimize their hearing rehabilitation.

Keywords: adults; cochlear implant; green cochlear; local anesthesia; simultaneous.