title: Replacement of a single-channel with a multichannel cochlear implant as an upgrade.
abstract: The removal of a functioning cochlear implant in order to upgrade to a more advanced device is a critical issue to many otologists, since we currently have no means to predict the results preoperatively. This paper reports on two patients who successfully upgraded from a single-channel to a multichannel implant. The new implants outperformed the original devices in both the live-voice test and the videotaped test. The patients stated that the hearing quality afforded by the multichannel implant was much better than that provided by the original implant.
authors.affiliation: Department of Otolaryngology, Ehime University School of Medicine, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Gyo
authors.forename: E
authors.initials: E
authors.lastname: Yumoto
authors.forename: N
authors.initials: N
authors.lastname: Yanagihara
authors.forename: N
authors.initials: N
authors.lastname: Takahashi
mesh_terms: D000328:Adult; D000368:Aged; D001299:Audiometry; D001307:Auditory Perception / Q000502:physiology; D003054:Cochlear Implants / Q000145:classification; D006312:Hearing Loss, Bilateral / Q000209:etiology / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D008297:Male; D017060:Patient Satisfaction; D012086:Reoperation; D013067:Speech Perception