Hearing preservation and speech perception outcomes with electric-acoustic stimulation after 12 months of listening experience.
OBJECTIVES/HYPOTHESIS
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).


STUDY DESIGN
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.


LEVEL OF EVIDENCE
4.
['Adunka|Oliver F|OF|', 'Dillon|Margaret T|MT|', 'Adunka|Marcia C|MC|', 'King|English R|ER|', 'Pillsbury|Harold C|HC|', 'Buchman|Craig A|CA|']
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
hearing preservation outcomes electric-acoustic stimulation Cochlear implant