Impact of superior semicircular canal dehiscence on cochlear implant audiologic outcomes

William Kady, Pedrom C. Sioshansi, Natalie Wall, Denny Bojrab I.I., Nathan Tu, Kenny Lin, John Zappia, Robert Hong, Sandra Porps, Seilesh C. Babu

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: Determine whether adult cochlear implant users with radiographic superior semicircular canal dehiscence experience clinically significant differences in audiological outcomes when compared to cochlear implant users with normal temporal bone anatomy. Materials and methods: Retrospective, single institution review. Adult, post-lingual deaf patients implanted between 2010 and 2020. Inclusion criteria included age 18 years or older, available preoperative computed tomography imaging, and preoperative and postoperative AzBio audiological data for at least 6 months of cochlear implant use. Preoperative and postoperative AzBio Sentence Test scores were compared between patients with normal temporal bone anatomy and those with radiographic superior semicircular canal dehiscence or near dehiscence. Results: 110 patients met inclusion criteria. Mean AzBio score for normal temporal bone anatomy group improved from 35.2 % (SD 28.2) preoperatively to 70.3 % (SD 25.7) postoperatively, an improvement of 35.1 % (SD 28.6). Mean AzBio score for near dehiscent temporal bone anatomy group improved from 26.6 % (SD 28.9) preoperatively to 64.5 % (SD 30.6) postoperatively, an improvement of 37.9 % (SD 27.9). Mean AzBio score for dehiscent temporal bone anatomy group improved from 26.3 % (SD 20.4) preoperatively to 65.1 % (SD 27.6) postoperatively, an improvement of 38.7 % (SD 26.9). Utilizing the one-way analysis of variance test, there was no significant difference in audiologic outcomes between the three groups. Conclusions: Patients with complete or near complete radiographic superior canal dehiscence at the time of cochlear implantation achieve similar improvements in speech perception scores compared to normal anatomy adult cochlear implant users.

Original languageEnglish (US)
Article number104320
JournalAmerican Journal of Otolaryngology - Head and Neck Medicine and Surgery
Volume45
Issue number4
DOIs
StatePublished - Jul 1 2024

Keywords

  • Cochlear implant outcomes
  • Superior semicircular canal dehiscence

ASJC Scopus subject areas

  • Otorhinolaryngology

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