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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Sequential pediatric bilateral cochlear implantation: The effect of time interval between implants.

Giovanni Bianchin1, Lorenzo Tribi1, Patrizia Formigoni1

  • 1Department of Otolaryngology and Audiology, Arcispedale Santa Maria Nuova - IRCCS, Reggio Emilia, Italy.

International Journal of Pediatric Otorhinolaryngology
|November 7, 2017
PubMed
Summary

Sequential bilateral cochlear implants (CI) improve speech intelligibility in children, especially in noise. Benefits are more pronounced with shorter intervals, but even long delays warrant consideration for CI surgery.

Keywords:
Inter-implant intervalSequential bilateral cochlear implant (SBCI)Speech intelligibility

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Area of Science:

  • Audiology
  • Pediatric Otolaryngology
  • Speech-Language Pathology

Background:

  • Congenital profound sensorineural hearing loss impacts speech and language development.
  • Bilateral cochlear implantation (CI) offers significant benefits for hearing recovery.
  • Increasing trend in pediatric bilateral CI surgeries observed.

Purpose of the Study:

  • To evaluate speech intelligibility in children with sequential bilateral cochlear implants (SBCI).
  • To determine the impact of the time interval between sequential bilateral cochlear implantations on speech outcomes.

Main Methods:

  • Study included 27 children undergoing SBCI with short (1-3 yrs), medium (4-6 yrs), and long (7-12 yrs) inter-stage intervals.
  • Speech perception tests were conducted in quiet and noise under three conditions: first CI only, second CI only, and both CIs.
  • Outcomes were analyzed based on the duration of the interval between implantations.

Main Results:

  • Speech intelligibility in noise significantly improved with bilateral CI compared to single CI use across all interval groups.
  • Modest gains in speech perception in quiet were observed, particularly in the long inter-stage interval group.
  • Bilateral benefit was evident regardless of the inter-stage interval duration.

Conclusions:

  • The advantages of a second cochlear implant are most apparent in younger children and those with shorter delays between implantations.
  • Sequential bilateral cochlear implantation is a viable option even after extended periods of deafness and long inter-stage intervals.
  • Consideration of SBCI is recommended for pediatric patients with profound hearing loss, irrespective of the time elapsed between implantations.