title: Preserved low-frequency hearing following 20-mm cochlear implantation.
abstract: OBJECTIVE
  To determine the preservation of pure tone thresholds for a series of cochlear implant patients who underwent atraumatic round window insertion with a new thin 22-mm electrode to a 20-mm depth.
  
  
  METHODS
  Retrospective, within-subject repeated measures design.
  
  
  METHODS
  Tertiary care hospital.
  
  
  METHODS
  Nine sequential cochlear implant patients with functional preoperative acoustic hearing (defined as low-frequency pure tone average thresholds ≤90 dB).
  
  
  METHODS
  Therapeutic.
  
  
  METHODS
  Pure tone thresholds after cochlear implantation.
  
  
  RESULTS
  Low-frequency hearing preservation was achieved in all cases. Less than 10 dB average change was seen for low-frequency pure tone average measures (125, 250, 500, and 1,000 Hz) at 6 and 12 months following cochlear implantation.
  
  
  CONCLUSIONS
  Atraumatic round window insertion with a thin 22-mm electrode to a 20-mm depth results in dramatically high levels of acoustic hearing preservation among CI patients.
authors.affiliation: *Department of Otolaryngology-Head and Neck Surgery, Weill Cornell Medical College and New York Presbyterian Hospital, New York; †Weill Cornell Medical College, New York; and ‡Hearing and Speech Center, Weill Cornell Medical College, New York, New York, U.S.A.
authors.forename: Kevin D
authors.initials: KD
authors.lastname: Brown
authors.forename: Myles F
authors.initials: MF
authors.lastname: Melton
authors.forename: Hannah
authors.initials: H
authors.lastname: Shonfield
authors.forename: Michelle
authors.initials: M
authors.lastname: Kraskin
authors.forename: Jennifer
authors.initials: J
authors.lastname: Wolf
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold / Q000502:physiology*; D002675:Child, Preschool; D019929:Cochlear Implantation / Q000379:methods*; D003054:Cochlear Implants; D005260:Female; D006309:Hearing / Q000502:physiology*; D034381:Hearing Loss / Q000503:physiopathology / Q000601:surgery*; D006320:Hearing Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D016896:Treatment Outcome; D055815:Young Adult