CC BY-NC-ND 4.0 · Laryngorhinootologie 2019; 98(S 02): S131
DOI: 10.1055/s-0039-1686386
Abstracts
Otology

Direct-Drive-Auditory Brainstem Response (DDS-ABR)

B Hallak
1   Uniklinik Würzburg, Würzburg
,
S Kaulitz
2   Uniklinikum Würzburg, Würzburg
,
M Cebulla
2   Uniklinikum Würzburg, Würzburg
,
R Hagen
2   Uniklinikum Würzburg, Würzburg
› Author Affiliations
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Background:

The direct drive simulation (DDS) offers patients a preoperative sound simulation of the active middle ear implant "Vibrant Soundbridge®. After developing DDS-pure tone audiometry (DDS-PTA) and DDS-speech audiometry (DDS-SA) it was the aim of this study to develop an objective audiometric test, the DDS-ABR.

Material und Methods:

20 normal hearing subjects were tested. After measuring an ABR via insert earphones (EAR3A) a DDS-ABR was performed via the DDS-FMT which was attached to the tympanic membrane. A CE-Chirp was used as a stimulus. The ABR thresholds were then compared to the PTA and the DDS-PTA respectively.

Results:

The ABR threshold via EAR3A was derivable in all tested subjects. It was possible to determine the DDS-ABR threshold of 16 subjects. 4 subjects were excluded due to technical problems. The median EAR3A- ABR-threshold was 10dB, the median DDS-ABR-threshold was 30dB. The maximum interindividual variation was 20dB in DDS-ABR and 10dB in EAR3A-ABR. The median of the EAR3A-PTA (2 – 4 kHz) was 5dB, the one of the DDS-PTA 10dB. The DDS-ABR threshold correlated well with the DDS-PTA.

Discussion:

It could be shown that the DDS-ABR threshold curve yielded equivalent results to the DDS-PTA (2 – 4 kHz). Interindividual differences in the thresholds possibly result from fluctuating coupling quality.

Summary:

DDS-ABR is possible. The DDS-ABR threshold correlates well with the DDS-PTA. For the first time DDS-ABR offers the possibility of an objective DDS-test. DDS-PTA is the key tool to evaluate the coupling quality which is a precondition for correct interpretation of the DDS-ABR.



Publication History

Publication Date:
23 April 2019 (online)

© 2019. 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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