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Related Experiment Videos

Promontory stimulation following labyrinthectomy.

R T Ramsden1, M S Timms

  • 1Department of Oto-Laryngology, Manchester Royal Infirmary.

The Journal of Laryngology and Otology
|September 1, 1991
PubMed
Summary

Cochlear implantation may be feasible in patients with a labyrinthectomized ear. Promontory stimulation testing showed comparable results to those who received cochlear implants.

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Area of Science:

  • Otolaryngology
  • Neurosurgery
  • Auditory Neuroscience

Background:

  • Osseous labyrinthectomy is a surgical procedure that removes the labyrinth.
  • Cochlear implantation aims to restore hearing in individuals with severe to profound hearing loss.
  • Evaluating the feasibility of cochlear implantation after labyrinthectomy is crucial for expanding treatment options.

Purpose of the Study:

  • To assess the potential for cochlear implantation in patients who have undergone osseous labyrinthectomy.
  • To compare the results of promontory stimulation testing in labyrinthectomized ears with those of successfully cochlear-implanted ears.

Main Methods:

  • Promontory stimulation testing was performed on ten patients post-osseous labyrinthectomy.
  • Results were compared to a control group of ten patients with successful Nucleus 22 channel cochlear implants.

Main Results:

  • Electrical hearing thresholds, discomfort levels, and dynamic ranges in the labyrinthectomized group were comparable to the cochlear implant group.
  • This indicates a similar level of neural excitability and potential for auditory stimulation.

Conclusions:

  • Cochlear implantation is a potential option for hearing restoration in individuals with a history of osseous labyrinthectomy.
  • These findings support further investigation into cochlear implant candidacy for labyrinthectomized ears.

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