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Sequential Bilateral Cochlear Implantation With Prolonged Time Intervals.

Zhikai Zhang1, Chaogang Wei1, Yanmei Zhang1

  • 1Department of Otolaryngology, Head and Neck Surgery, Peking University First Hospital, Beijing, China.

Journal of Speech, Language, and Hearing Research : JSLHR
|August 29, 2020
PubMed
Summary

Sequential cochlear implantation (CI) with a long interval between devices showed slower progress with the second implant. However, bilateral CI use significantly improved speech recognition and quality of life.

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Area of Science:

  • Audiology
  • Neuroscience
  • Otolaryngology

Background:

  • Sequential cochlear implantation (CI) involves receiving two devices over time.
  • A prolonged interval between implants may affect outcomes.
  • Understanding the impact of delayed second CI is crucial for patient management.

Purpose of the Study:

  • To evaluate the effect of a long interval (mean 15.2 years) between sequential cochlear implants (CIs) on speech recognition and quality of life.
  • To compare speech recognition trajectories between the first and second implanted ears.
  • To assess the 12-month outcomes of bilateral CI use after a prolonged interimplant period.

Main Methods:

  • Prospective study of 14 prelingually deafened adults receiving a second CI after a mean 15.2-year interval.
  • Speech recognition tests in quiet and noise were analyzed for each CI individually and combined.
  • Nijmegen Cochlear Implant Questionnaire assessed health-related quality of life at baseline and 12 months post-activation.

Main Results:

  • Speech recognition improved with the first CI and with bilateral use, but progress was slower with the second CI alone.
  • A significant difference in speech recognition improvement trajectory was observed between the first and second implanted ears.
  • All participants reported benefits in quality of life after 12 months of bilateral CI use.

Conclusions:

  • Prolonged intervals between sequential cochlear implants lead to asymmetrical speech recognition abilities.
  • While the second implanted ear shows slower progress, bilateral CI use significantly enhances speech recognition and health-related quality of life.
  • Delayed second CI can still yield substantial benefits for hearing and well-being.