Cochlear Implantation Improves Localization Ability in Patients With Unilateral Deafness

Távora-Vieira, Dayse; Ceulaer, Geert De; Govaerts, Paul; Rajan, Gunesh

doi:10.1097/aud.0000000000000130

Cited by 90 publications

(83 citation statements)

References 35 publications

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“…While there was a limited number of subjects in this study, the data consistent with previous SSD studies [Cabral et al, 2016;Dorman et al, 2016;Finke et al, 2017;Firszt et al, 2012a, b;Kuppler et al, 2013;Kitoh et al, 2016;Mertens et al, 2015aMertens et al, , 2017Nawaz et al, 2014;Rahne and Plontke, 2016;Távora-Vieira et al, 2015;Tokita et al, 2014;Van de Heyning et al, 2008;Vermeire and Van de Heyning, 2009;Zeitler et al, 2015].…”

Section: Discussionsupporting

confidence: 81%

“…Localization was significantly better with the CI on, consistent with previous studies [Dorman et al, 2016;Firszt et al, 2012a, b;Mertens et al, 2015a;Nawaz et al, 2014;Távora-Vieira et al, 2015;Vermeire and Van de Heyning, 2009;Zeitler et al, 2015]. The mean improvement in RMSE across all subjects was 13.8°, with better localization in 13 of 18 subjects.…”

Section: Localizationsupporting

confidence: 81%

“…Mean RMSE with the CI on (48.7°) remained much poorer than that of the NH control group (16.8°). Mean localization across all subjects was also somewhat poorer than reported in previous SSD CI studies [Arndt et al, 2011;Dorman et al, 2016;Firszt et al, 2012a;Távora-Vieira et al, 2015;Zeitler et al, 2015], possibly due to study differences in terms of the experimental setup (speaker placement and spacing, stimulus type level roving, etc.) and the inclusion of SSD subjects with mild-to-moderate hearing loss.…”

Section: Localizationcontrasting

confidence: 45%

“…Note that the 3 subjects who did not exhibit improved localization (S5, S6, S8) also reported that they did not use the CI all day long. Localization has been shown to continue to improve in SSD CI patients beyond one year of constant CI use [Távora-Vieira et al, 2015]. There was no significant difference in localization between the UNRES and RES groups, suggesting that mild-to-moderate hearing loss in the nonimplanted ear did not limit localization abilities.…”

Section: Localizationmentioning

confidence: 84%

“…For SSD patients, restoration of binaural function is possible with a cochlear implant (CI). A number of studies have shown that CI can improve SSD patients' localization, speech understanding in noise, and QoL [Cabral et al, 2016;Dorman et al, 2016;Finke et al, 2017;Firszt et al, 2012a, b;Kuppler et al, 2013;Kitoh et al, 2016;Mertens et al, 2015aMertens et al, , b, 2017Nawaz et al, 2014;Rahne and Plontke, 2016;Távora-Vieira et al, 2015;Tokita et al, 2014;Van de Heyning et al, 2008;Vermeire and Van de Heyning, 2009;Zeitler et al, 2015]. Many SSD patients also are affected by debilitating tinnitus, for which there is no consistently effective intervention.…”

Section: Introductionmentioning

confidence: 99%

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Binaural Perception in Single-Sided Deaf Cochlear Implant Users with Unrestricted or Restricted Acoustic Hearing in the Non-Implanted Ear

Dorbeau

Galvin

et al. 2018

Audiol Neurotol

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Cochlear implantation (CI) can benefit patients with single-sided deafness (SSD) in terms of sound localization, speech understanding in noise, tinnitus severity, and quality of life (QoL). In previous studies, CI outcomes have been largely reported for SSD patients with normal “unrestricted” hearing in the contralateral ear. However, SSD patients may often have some degree of hearing loss in the contralateral ear (“restricted” acoustic hearing). In this study, we report results from a French clinical trial for CI in in SSD patients (NCT02204618). Localization, speech reception thresholds (SRTs) in noise, tinnitus severity, and QoL were evaluated in 18 SSD patients 1 year after CI. Data were analyzed for 2 subject groups according to the pure-tone average thresholds in the non-implanted ear: unrestricted acoustic hearing (UNRES; ≤25 dB HL; n = 10) and restricted acoustic hearing (RES; > 25 dB HL; n = 8). Across all subjects, localization was significantly better with the CI on than off (p = 0.005); there was no significant difference between subject groups (p = 0.301). When speech and noise were co-located (S0N0), there was no significant difference in SRTs with the CI on or off (p = 0.480); SRTs were significantly better for the UNRES than for the RES group (p = 0.005). When speech and noise were spatially separated (S_CIN_NH), SRTs were significantly better with the CI on than off (p < 0.001). While SRTs were better for the UNRES than for the RES group (p = 0.024), the CI benefit was more than 50% greater for the RES group due to the restoration of high-frequency speech cues. Questionnaire data showed that tinnitus severity was significantly reduced (p = 0.045) and QoL was significantly improved after one year of experience with the CI (p < 0.001). Age at testing was significantly correlated with SRTs for the S0N0 condition; duration of deafness was correlated with SRTs for the S_CIN_NH condition. There were relatively few correlations between behavioral and subjective measures, suggesting that both were valuable when assessing CI benefits for SSD patients. The present data suggest that indications for CI should be expanded to include unilaterally deaf patients who have normal hearing or mild-to-moderate hearing loss in the non-implanted ear.

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Section: Discussionsupporting

confidence: 81%

Section: Localizationsupporting

confidence: 81%

Section: Localizationcontrasting

confidence: 45%

Section: Localizationmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Binaural Perception in Single-Sided Deaf Cochlear Implant Users with Unrestricted or Restricted Acoustic Hearing in the Non-Implanted Ear

Dorbeau

Galvin

et al. 2018

Audiol Neurotol

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Benefits of Cochlear Implantation for Older Adults With Asymmetric Hearing Loss

Johnson,

Dillon,

Thompson

et al. 2024

The Laryngoscope

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Objective(s)FDA‐approved indications for cochlear implantation include patients with severe‐to‐profound unilateral hearing loss (UHL) or asymmetric hearing loss (AHL); however, these indications are not covered for Medicare beneficiaries. We assessed the outcomes of cochlear implant (CI) use for older adults with UHL or AHL.MethodsEighteen older adults (≥65 years of age at surgery) with UHL/AHL participated in a prospective, longitudinal investigation evaluating outcomes of CI use. Speech recognition for the affected ear was evaluated with consonant‐nucleus‐consonant (CNC) words. Spatial hearing was assessed with measures of sound source localization and sentence recognition in noise. The target sentence was presented from the front and the masker was either co‐located with the target (SoNo), presented toward the affected ear (SoNci) or contralateral ear (SoNcontra). Perceived benefit was assessed with the Speech, Spatial, and Qualities of Hearing scale (SSQ) and the Tinnitus Handicap Inventory (THI).ResultsParticipants experienced significant improvements with CI use for CNC words (mean [SD]; preop: 8% [10%], 1 yr: 51% [22%], 5 yr: 50% [19%]), masked sentence recognition (SoNcontra preop: 5% [6%], 1 yr: 22% [15%], 5 yr: 41% [14%]), and localization (preop: 76° [18°], 1 yr: 40° [11°], 5 yr: 41° [14°]), and reported significant improvements in hearing abilities (SSQ Spatial Hearing preop: 3 [1], 1 yr: 6 [2], 5 yr: 6 [2]) and tinnitus severity (THI preop: 16 [18], 1 yr: 4 [14], 5 yr: 6 [12]).ConclusionOlder adults with UHL/AHL experience significant improvements in speech recognition, spatial hearing, and subjective perceptions (e.g., hearing abilities and tinnitus severity) with a CI as compared to pre‐operative abilities.Level of EvidenceIV Laryngoscope, 2024

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Sound localization in patients with a unilateral hearing aid: Discordance between the right and left ears

Kim

Lee

et al. 2022

Laryngoscope Investig Oto

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Objectives Patients with unilateral hearing loss (UHL) have difficulty in recognizing the direction of a sound. Previous studies have shown that hearing aids (HAs) could improve the directional perception of sound. In this study, we analyzed the results of sound localization tests in patients using a unilateral HA. Methods All patients with UHL who had performed sound localization tests since 2018 were included in this study. Sound localization tests, functional gain tests, and the speech discrimination scores (SDSs) were analyzed. The tests were obtained at 1‐, 3‐, and 6‐month after fitting the HA. Results Of the 32 patients with UHL, 13 were right‐sided and 19 were left‐sided. After 6 months of using a HA, the results of the sound localization test were significantly better in patients with right than left UHL (percent correct [PCT], 61.9 ± 24.0% vs. 37.9 ± 24.6%, p = .011; mean absolute error (MAE), 41.4 ± 23.9° vs. 65.5 ± 28.6°, p = .018; root‐mean‐square error (RMS), 25.8 ± 17.6° vs. 48.8 ± 24.5°, p = .007]. The aided SDSs were not different between the two groups (78.7 ± 16.5% vs. 77.2 ± 18.5%, p = .825). Conclusion The side of the hearing loss could have a substantial effect on sound localization in UHL patients using a HA. Sound localization test results should be interpreted with the consideration of this discordance. Level of Evidence 4

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Cochlear Implantation Improves Localization Ability in Patients With Unilateral Deafness

Abstract: Cochlear implantation is effective in improving localization abilities in subjects with unilateral deafness. The root mean square error dropped significantly with binaural hearing compared to monaural hearing.

Cited by 90 publications

References 35 publications

Binaural Perception in Single-Sided Deaf Cochlear Implant Users with Unrestricted or Restricted Acoustic Hearing in the Non-Implanted Ear

Binaural Perception in Single-Sided Deaf Cochlear Implant Users with Unrestricted or Restricted Acoustic Hearing in the Non-Implanted Ear

Benefits of Cochlear Implantation for Older Adults With Asymmetric Hearing Loss

Sound localization in patients with a unilateral hearing aid: Discordance between the right and left ears

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