CC BY-NC-ND 4.0 · Laryngorhinootologie 2022; 101(S 02): S256
DOI: 10.1055/s-0042-1746834
Poster
Otology / Neurootology / Audiology: Active middle ear implants / bone conduction hearing system

Audiological long-term results with the Bonebridge BCI 601

Susan Busch
1   Medizinische Hochschule Hannover, HNO Hannover
,
Nicole Knölke
1   Medizinische Hochschule Hannover, HNO Hannover
,
Hannes Maier
2   Medizinische Hochschule Hannover/NIFE, HNO Hannover
,
Thomas Lenarz
1   Medizinische Hochschule Hannover, HNO Hannover
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    Introduction  At the Hannover Medical School, the Bonebridge is used as a treatment for patients with conductive and mixed hearing loss or in cases of single-sided deafness (SSD) since 2011. An evaluation of the long-term performance of the BCI 601 in implanted patients is therefore indispensable.

    Methods  A retrospective screening of 55 ears implanted with the Bonebridge BCI 601 between 2011 and 2016 identified complete audiological data sets (preoperative/pre, 1 year/J1, 5 years/J5) for 32 patients. Data sets were divided into patients with SSD (SSD group; n=8) and a normal hearing ear on the contralateral side (PTA4 KLc 8.0 dB HL and LLc 9.2 dB HL) and patients implanted on the ipsilateral side (IPSI group; n=24; KL 18.6 dB HL and LL 67.0 dB HL).

    Results  The preoperative bone conduction thresholds (SSD: KLc 9.1 dB HL; IPSI: KL 19.8 dB HL) remain stable after implantation up to J1 (SSD KLc 8.0 dB HL; IPSI KL 18.6 dB HL). Thresholds only slightly deteriorate from J1 to J5, significant results are found at 3 kHz (p=0.011) and 4 kHz (p=0.003) in der SSD group und at 0.5 kHz (p<0.001) in the IPSI group.

    The mean aided threshold showed no significant differences between J1 (27.7 dB HL) und J5 (30.3 dB HL) in the SSD group. The mean aided threshold even ameliorated in the IPSI group from J1 (34.6 dB HL) to J5 (28.5 dB HL) with significant improvement found at 0.5 (-7.1 dB; p=0.004) and 1 kHz (-5.4 dB; p=0.021).

    The word recognition score with the Bonebridge determined with the Freiburg monosyllable test at 65 dB SPL at J1 (SSD 88.8%; IPSI 81.5%) remained comparably good at J5 (SSD 84.4%; IPSI 85.4%).

    Discussion: Patients implanted with the Bonebridge profit from stable inner ear thresholds and good speech perception even 5 years after implantation.


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    Conflict of Interest

    The author declares that there is no conflict of interest.

    Publication History

    Article published online:
    24 May 2022

    © 2022. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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