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Related Experiment Videos

Factors Influencing Cochlear Patency after Translabyrinthine Surgery.

Brian Rodgers1, Emily Stucken1, Aaron Metrailer1

  • 11 Michigan Ear Institute, Farmington Hills, Michigan, USA.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|April 19, 2017
PubMed
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More than half of patients retain cochlear patency after vestibular schwannoma surgery. Preoperative factors like tumor size or hearing ability do not predict cochlear patency, crucial for cochlear implants.

Area of Science:

  • Neurosurgery
  • Otolaryngology
  • Radiology

Background:

  • Vestibular schwannoma (VS) surgery, particularly translabyrinthine (TL) approaches, can impact cochlear patency.
  • Cochlear patency is essential for successful cochlear implantation in cases of unilateral deafness post-surgery.
  • Predictive factors for maintaining cochlear patency after TL surgery require further investigation.

Purpose of the Study:

  • To identify predictive factors for cochlear obliteration following translabyrinthine surgery for vestibular schwannoma.
  • To assess the relationship between preoperative tumor characteristics, hearing metrics, and postoperative cochlear patency.

Main Methods:

  • A retrospective chart review of 103 patients who underwent TL surgery for VS between 2010 and 2015.
  • Postoperative magnetic resonance imaging (MRI), including heavily T2-weighted and FLAIR sequences, was analyzed to evaluate cochlear patency.
Keywords:
acoustic neuromacochlea fluid signalcochlear fibrosiscochlear implantcochlear obliterationcochlear patencysingle-sided deafnesstranslabyrinthinevestibular schwannoma

Related Experiment Videos

  • Comparison of tumor size, audiometric data, and preoperative MRI FLAIR intensity between patients with and without cochlear patency.

    • Main Results:

    • Fifty-four percent of patients maintained cochlear patency after TL surgery.
    • No statistically significant differences were found in tumor size, speech reception thresholds, pure-tone average, word recognition scores, or preoperative MRI FLAIR intensity between patent and non-patent groups.
    • Preoperative factors did not reliably predict cochlear patency post-surgery.

    Conclusions:

    • Cochlear patency is preserved in over half of patients after TL surgery for VS.
    • Preoperative tumor size, hearing function, and MRI FLAIR signal intensity are not predictive of cochlear patency.
    • Strategies like simultaneous cochlear implantation or cochlear lumen keeper placement may be considered to preserve hearing opportunities.