title: Reimplantation with a conventional length electrode following residual hearing loss in four hybrid implant recipients.
abstract: OBJECTIVE
  Revision surgery using a newer-generation conventional length cochlear implant electrode will provide improved speech perception in patients that initially underwent hybrid electrode implantation and experienced post-operative loss of residual hearing and performance deterioration.
  
  
  METHODS
  We present four patients who experienced delayed post-operative hearing loss following implantation with the Nucleus Hybrid S8 device and underwent reimplantation with the Nucleus Freedom or Nucleus 5 device using the Contour Advance array. Pure-tone thresholds and speech perception data were retrospectively reviewed.
  
  
  METHODS
  Four subjects underwent reimplantation with the Nucleus Freedom or Nucleus 5 device after experiencing deteriorating performance related to delayed acoustic hearing loss. Comparison of pre-revision performance to the most recent post-revision performance demonstrated improved speech perception performance in all subjects following reimplantation.
  
  
  CONCLUSIONS
  A small percent of patients will experience a significant loss of residual low-frequency hearing following hybrid implantation thereby becoming completely reliant on a shorter electrode for electrical stimulation. In the current series, reimplantation with a conventional length electrode provided improved speech perception performance in such patients. Revision surgery with a conventional length electrode should be considered in 'short electrode' recipients who experience performance deterioration following loss of residual hearing.
authors.affiliation: Department of Otolaryngology Head and Neck Surgery, Mayo Clinic School of Medicine, Rochester, MN, USA.
authors.forename: Matthew L
authors.initials: ML
authors.lastname: Carlson
authors.forename: David J
authors.initials: DJ
authors.lastname: Archibald
authors.forename: Rene H
authors.initials: RH
authors.lastname: Gifford
authors.forename: Colin Lw
authors.initials: CL
authors.lastname: Driscoll
authors.forename: Charles W
authors.initials: CW
authors.lastname: Beatty
mesh_terms: D000368:Aged; D019929:Cochlear Implantation; D003054:Cochlear Implants; D004567:Electrodes, Implanted; D005260:Female; D034381:Hearing Loss / Q000175:diagnosis / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000175:diagnosis / Q000601:surgery*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation / Q000379:methods; D012092:Replantation / Q000379:methods*; D013069:Speech Reception Threshold Test