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Vestibular function after cochlear implant surgery.

Annalisa Meli1, Bernadette Musumeci Aud1, Simona Tognocchi Aud1

  • 1a ENT Audio-Vestibology Unit, Ospedale di Circolo e Fondazione MACCHI , Varese , Italy.

Cochlear Implants International
|July 7, 2015
PubMed
Summary
This summary is machine-generated.

Cochlear implantation (CI) surgery can cause vestibular damage in 12% of patients, affecting specific vestibular functions. However, patients typically show efficient vestibular compensation, preventing balance issues.

Keywords:
Caloric stimulationCervical VEMPCochlear implantStabilometryVestibular compensationVestibular functionVestibulo-ocularVestibulo-spinal

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Area of Science:

  • Otolaryngology
  • Neuroscience
  • Audiology

Background:

  • Cochlear implantation (CI) is a common treatment for severe to profound hearing loss.
  • Potential iatrogenic damage to vestibular function following CI surgery is a concern.
  • Understanding the impact of CI on vestibular system is crucial for patient management.

Purpose of the Study:

  • To evaluate vestibular function changes after cochlear implantation.
  • To assess iatrogenic effects of CI surgery on the vestibular system.
  • To investigate the compensatory mechanisms for vestibular deficits post-CI.

Main Methods:

  • Prospective study of 25 patients undergoing cochlear implantation.
  • Evaluation of vestibulo-ocular and vestibulo-spinal responses pre- and post-surgery.
  • Utilized videoculography, caloric stimulation, evoked myogenic potentials, and stabilometry.

Main Results:

  • Vestibular receptor damage observed in 12% of patients post-CI.
  • Reduced function in horizontal semicircular canals and saccular function noted.
  • Audiometric thresholds worsened post-surgery, but patients reported no disequilibrium.

Conclusions:

  • Cochlear implantation can lead to vestibular damage in a subset of patients.
  • Despite vestibular deficits, patients exhibit effective compensatory mechanisms.
  • Vestibular compensation appears robust in cochlear implant recipients.