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[Vestibular function in cochlear implants--prognostic factors and postoperative damage]

T Himi1, T Shintani, T Yamaguchi

  • 1Department of Otolaryngology, Sapporo Medical University.

Nihon Jibiinkoka Gakkai Kaiho
|July 1, 1995
PubMed
Summary
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Preoperative vestibular function may predict speech perception in cochlear implant patients with short-term deafness. Vestibular function tests showed minimal post-surgery damage and transient vertigo.

Area of Science:

  • Otolaryngology
  • Neuroscience
  • Audiology

Context:

  • Cochlear implants (CI) are crucial for hearing restoration in severe to profound deafness.
  • Vestibular function's role in CI outcomes is increasingly recognized.
  • Understanding pre-existing vestibular function is key for predicting post-implantation speech perception.

Purpose:

  • To investigate the correlation between preoperative vestibular function and postoperative speech perception in patients with 22-channel cochlear implants.
  • To assess the impact of deafness duration on this correlation.
  • To evaluate surgical effects on vestibular function and associated symptoms.

Summary:

  • Preoperative vestibular function tests (caloric, stabilometry) showed no correlation with CI psychophysical factors or initial speech perception.

Related Experiment Videos

  • However, residual vestibular function correlated with consonant recognition scores in patients with 10-20 years of deafness.
  • Body sway area, not Romberg ratio, correlated with consonant recognition in short-duration deafness patients, suggesting predictive value.

    • Impact:

    • Preoperative vestibular assessment may predict postoperative speech perception, particularly consonant recognition, in specific patient groups (short deafness duration).
    • Cochlear implant surgery demonstrated minimal vestibular damage, with transient vertigo in 28% of patients.
    • Stabilometry results remained unchanged post-surgery, indicating preserved body balance control.