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Auditory brainstem implant in posttraumatic cochlear nerve avulsion.

V Colletti1, M Carner, V Miorelli

  • 1ENT Department, University of Verona, Verona, Italy. vittoriocolletti@yahoo.com

Audiology & Neuro-Otology
|June 19, 2004
PubMed
Summary
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Auditory brainstem implants (ABI) are now indicated for patients with profound hearing loss from head injuries. This study shows ABIs successfully restore hearing in these patients, enabling conversation.

Area of Science:

  • Neurosurgery
  • Audiology
  • Biomedical Engineering

Background:

  • Auditory brainstem implants (ABI) are typically for neurofibromatosis type 2 patients over 12.
  • This study investigates extending ABI indications to patients with profound hearing loss due to head injuries.

Observation:

  • Six patients (5 adults, 1 child) with head injury-induced hearing loss received ABIs.
  • The retrosigmoid approach was used, with electrode placement confirmed by electrophysiological monitoring.
  • No surgical or activation complications were observed.

Findings:

  • All patients achieved functional hearing with ABI.
  • Word recognition scores ranged from 40-100%, with some patients achieving sentence recognition and speech tracking.
  • Successful communication, including phone conversations, was reported in some cases.

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Implications:

  • ABI is a viable auditory rehabilitation option for individuals with damaged cochleas or cochlear nerves from head trauma.
  • This expands ABI's therapeutic potential beyond its traditional indications.
  • Further research can explore long-term outcomes and refine surgical techniques for this patient group.