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Cochlear implantation for single-sided deafness: A multicenter study.

Douglas P Sladen1, Christopher D Frisch1, Matthew L Carlson1

  • 1Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, U.S.A.

The Laryngoscope
|June 28, 2016
PubMed
Summary
This summary is machine-generated.

Cochlear implantation significantly improves speech recognition for single-sided deafness. While hearing in quiet improves, understanding speech in noise with both ears remains unchanged at six months post-implantation.

Keywords:
Cochlear implantsignal-to-noise ratiosingle-sided deafnessspeech understanding in noisesudden sensorineural hearing losstinnitus

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Area of Science:

  • Otolaryngology
  • Neuroscience
  • Audiology

Background:

  • Single-sided deafness (SSD) and asymmetric hearing loss present significant challenges to auditory perception.
  • Cochlear implantation is an established treatment for bilateral sensorineural hearing loss, but its efficacy in SSD is still under investigation.

Purpose of the Study:

  • To evaluate the preliminary outcomes of cochlear implantation in patients with single-sided deafness and asymmetric hearing loss.
  • To assess improvements in speech recognition and tinnitus symptoms following cochlear implantation.

Main Methods:

  • A retrospective and prospective study design was employed across two centers.
  • Pre- and postoperative speech recognition in quiet (monosyllabic words and sentences) and in noise (bilateral condition) were measured.
  • Patient-reported tinnitus outcomes were also collected.

Main Results:

  • Significant improvements were observed in monosyllabic word recognition (11.3% to 48.7%) and sentence recognition in quiet (18.4% to 65.9%) at 3 months postactivation.
  • Speech recognition in noise in the best-aided bilateral condition showed a non-significant increase from 59% to 72% at 6 months.
  • Tinnitus improved in 12 out of 13 patients who reported preoperative tinnitus.

Conclusions:

  • Cochlear implantation demonstrates significant benefits for speech recognition in the implanted ear for individuals with single-sided deafness.
  • While improvements in quiet are notable, speech recognition in noise in a bilateral condition did not show statistically significant improvement at 6 months.
  • Cochlear implantation may also offer benefits for tinnitus management in this patient population.