title: The effects of cochlear implantation in Japanese single-sided deafness patients: five case reports.
abstract: CONCLUSIONS
  Cochlear implantation (CI) for Japanese single-sided deafness patients resulted in improved speech perception, increased sound localization accuracy, and reduced tinnitus handicap.
  
  
  OBJECTIVE
  This study reports results for five adult SSD cases with CI, focusing on the benefits they obtained in terms of speech recognition, sound localization, and tinnitus handicap.
  
  
  METHODS
  Five Japanese patients meeting the eligibility criteria were included in this study. All patients were implanted with a fully inserted MED-EL Concerto FLEX28® implant (MED-EL, Innsbruck, Austria). Speech perception outcomes in noise, as well as sound localization and tinnitus disturbance, were assessed pre-surgically and at 1, 3, 6, and 12 months after CI activation.
  
  
  RESULTS
  The Japanese monosyllable test score in noise improved gradually after implantation. In some cases, speech perception ability appeared unstable, particularly in the first 1-6 months after implantation. The sound localization ability showed marked improvement in all cases, with the disturbance to daily life caused by tinnitus also decreasing in all cases from the early post-operative period.
authors.affiliation: a Department of Otorhinolaryngology , Shinshu University School of Medicine , Matsumoto , Nagano , Japan ;
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Kitoh
authors.affiliation: a Department of Otorhinolaryngology , Shinshu University School of Medicine , Matsumoto , Nagano , Japan ;
authors.forename: Hideaki
authors.initials: H
authors.lastname: Moteki
authors.affiliation: a Department of Otorhinolaryngology , Shinshu University School of Medicine , Matsumoto , Nagano , Japan ;
authors.forename: Shinya
authors.initials: S
authors.lastname: Nishio
authors.affiliation: b Department of Otolaryngology , Saiseikai Utsunomiya Hospital , Utsunomiya , Tochigi , Japan ;
authors.forename: Seiichi
authors.initials: S
authors.lastname: Shinden
authors.affiliation: c Department of Otorhinolaryngology Head and Neck Surgery , Keio University School of Medicine , Tokyo , Japan ;
authors.forename: Sho
authors.initials: S
authors.lastname: Kanzaki
authors.affiliation: d Department of Otolaryngology , International University of Health and Welfare, Mita Hospital , Minato , Tokyo , Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Iwasaki
authors.affiliation: c Department of Otorhinolaryngology Head and Neck Surgery , Keio University School of Medicine , Tokyo , Japan ;
authors.forename: Kaoru
authors.initials: K
authors.lastname: Ogawa
authors.affiliation: a Department of Otorhinolaryngology , Shinshu University School of Medicine , Matsumoto , Nagano , Japan ;
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Usami
mesh_terms: D000328:Adult; D000368:Aged; D019929:Cochlear Implantation; D003638:Deafness / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013017:Sound Localization; D013067:Speech Perception; D014012:Tinnitus / Q000601:surgery
keywords: Cochlear implant; single-sided deafness; sound localization; tinnitus