title: Cochlear reimplantation with same device: surgical and audiologic results.
abstract: OBJECTIVE
  To study to what extent it is possible to achieve identical insertion depths and to maintain the same performance after cochlear reimplantation.
  
  
  METHODS
  Outcome research on a retrospective case series in a tertiary university referral center.
  
  
  METHODS
  Data were collected for 12 adults and three children who underwent reimplantation during the last 3 years with a new HiRes90K device with HiFocus 1J electrode owing to failure of the feed-through seal. Multislice computed tomography scans were used to compare positions of the original and newly placed electrode arrays. The speech-perception scores on a consonant-vowel-consonant word test before and after reimplantation were compared.
  
  
  RESULTS
  All reimplantations were successfully performed by two experienced cochlear implantation surgeons, and no complications were observed. Postoperative imaging showed that the average displacement of the new implant was only 0.59 mm. Reactivation of the implant gave immediate open set speech understanding in all patients, and speech perception rapidly returned to the previous level obtained with the original implant within weeks; it was even significantly better at the 3-month follow-up. No relation was found between changes in performance and the amount of displacement of the electrode array.
  
  
  CONCLUSIONS
  After cochlear reimplantation with the same device, electrode-array position can be accurately replicated and speech perception can be regained or even improved within weeks.
authors.affiliation: Department of Otorhinolaryngology, Leiden University Medical Center, Leiden, the Netherlands.
authors.forename: Kim S
authors.initials: KS
authors.lastname: van der Marel
authors.forename: Jeroen J
authors.initials: JJ
authors.lastname: Briaire
authors.forename: Berit M
authors.initials: BM
authors.lastname: Verbist
authors.forename: Raoul M S
authors.initials: RM
authors.lastname: Joemai
authors.forename: Peter-Paul B M
authors.initials: PP
authors.lastname: Boermans
authors.forename: Ferdinand A W
authors.initials: FA
authors.lastname: Peek
authors.forename: Johan H M
authors.initials: JH
authors.lastname: Frijns
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001299:Audiometry / Q000379:methods; D002648:Child; D002675:Child, Preschool; D019929:Cochlear Implantation / Q000009:adverse effects* / Q000379:methods; D003054:Cochlear Implants; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D034381:Hearing Loss / Q000209:etiology / Q000503:physiopathology / Q000601:surgery*; D006785:Hospitals, University; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000503:physiopathology / Q000601:surgery; D011475:Prosthesis Failure; D012086:Reoperation / Q000379:methods; D012092:Replantation / Q000379:methods*; D012189:Retrospective Studies; D018570:Risk Assessment; D013067:Speech Perception / Q000502:physiology; D018709:Statistics, Nonparametric; D016896:Treatment Outcome; D014705:Verbal Behavior; D014833:Voice Quality; D055815:Young Adult