title: Hearing preservation and speech perception outcomes with electric-acoustic stimulation after 12 months of listening experience.
abstract: OBJECTIVE
  To report on single-center data of an FDA-approved clinical trial on the objective benefits of cochlear implantation and subsequent ipsilateral Electric-Acoustic Stimulation (EAS).
  
  
  METHODS
  Single-center data from a prospective, multicenter clinical trial.
  
  
  METHODS
  Eighteen subjects completed the 12-month EAS evaluation and were included in this evaluation. Each patient underwent cochlear implantation using a standardized hearing preservation approach. Both hearing preservation and speech perception abilities were evaluated at various intervals. Speech testing included performance measures obtained in quiet (CNC words) and noise (adaptive CUNY protocol) in three listening conditions: hearing aid (HA) alone, cochlear implant (CI) only, and combined ipsilateral EAS.
  
  
  RESULTS
  Various levels of hearing preservation were achieved with cochleostomy and round-window surgical approaches in 17 of the 18 subjects. Mean CNC word scores at the 12-month interval were 14.9 ± 12.1, 45.3 ± 15.4, and 70.7 ± 11.7% correct in the HA only, CI only, and EAS conditions, respectively. Average CUNY scores at 0 dB SNR were 14.6 ± 17.2, 47.1 ± 22.1, and 72.2 ± 21.5 for the three test conditions obtained after 12 months.
  
  
  CONCLUSIONS
  Data obtained during this clinical trial correlate well with previous reports. Hearing preservation appears successful in a high number of subjects, and combined EAS offers excellent speech perception abilities in quiet and in noise.
  
  
  METHODS
  4.
authors.affiliation: Department of Otolaryngology/Head and Neck Surgery, University of North Carolina at Chapel Hill, North Carolina, U.S.A.
authors.forename: Oliver F
authors.initials: OF
authors.lastname: Adunka
authors.forename: Margaret T
authors.initials: MT
authors.lastname: Dillon
authors.forename: Marcia C
authors.initials: MC
authors.lastname: Adunka
authors.forename: English R
authors.initials: ER
authors.lastname: King
authors.forename: Harold C
authors.initials: HC
authors.lastname: Pillsbury
authors.forename: Craig A
authors.initials: CA
authors.lastname: Buchman
mesh_terms: D000158:Acoustic Impedance Tests; D000328:Adult; D000368:Aged; D001301:Audiometry, Pure-Tone; D019929:Cochlear Implantation; D004007:Dichotic Listening Tests; D004599:Electric Stimulation Therapy; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D013067:Speech Perception; D055815:Young Adult
keywords: Cochlear implant; electric-acoustic stimulation; hearing preservation; outcomes