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17.05.2019 | Otology

Benefits of a contralateral routing of signal device for unilateral Naída CI cochlear implant recipients

Zeitschrift:
European Archives of Oto-Rhino-Laryngology
Autoren:
Isabelle Mosnier, Ghizlene Lahlou, Jonathan Flament, Nathalie Mathias, Evelyne Ferrary, Olivier Sterkers, Daniele Bernardeschi, Yann Nguyen
Wichtige Hinweise

Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1007/​s00405-019-05467-9) contains supplementary material, which is available to authorized users.

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Abstract

Purpose

Many bilaterally deaf adults are only able to receive one cochlear implant (CI), resulting in suboptimal listening performance, especially in challenging listening environments. Adding a contralateral routing of signal (CROS) device to a unilateral CI is one possibility to alleviate these challenges. This study examined the benefit of such a CROS device.

Methods

Thirteen adult subjects with at least 6 months of CI use, and no or limited benefit of a hearing instrument in the contralateral ear were included in the study. The perceived benefit of a CROS device in everyday listening environments was evaluated up to 1 year after initial fitting using several questionnaires. Speech intelligibility performance was determined using the French matrix sentence test in quiet and in two speech-in-noise setups and was followed for 3 months after CROS fitting.

Results

Subjects indicated high satisfaction with the practical usability of the CROS device and long-term device retention was high. Perceived benefits in everyday listening environments were reported. Formal speech intelligibility tests revealed statistically significant median improvements of 6.93 dB SPL (Wilcoxon Z = 2.380, p = 0.017) in quiet and up to 8.00 dB SNR (Wilcoxon Z = 2.366, p = 0.018) in noise. These benefits were accessible immediately without a need for prolonged acclimatization.

Conclusions

Subjective satisfaction and device retention as well as speech intelligibility benefits in quiet and in noise prove the CROS device to be a valuable addition to a unilateral CI in cases of bilateral deafness where bilateral implantation is not an option.

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Zusatzmaterial
Supplementary file1 (PDF 615 kb)
405_2019_5467_MOESM1_ESM.pdf
Supplementary file2 (PDF 630 kb)
405_2019_5467_MOESM2_ESM.pdf
Literatur
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