Department of Oto-Rhino-Laryngology, Head and Neck Surgery, University Hospital Halle (Saale), Germany.
J Neurosci Methods. 2010 Nov 30;193(2):300-6. doi: 10.1016/j.jneumeth.2010.09.013. Epub 2010 Sep 25.
Patients suffering from conductive or mixed hearing loss and Single-Sided Deafness may benefit from implantable hearing devices relying on bone conducted auditory stimulation. However, with only passively cooperative patients, objective methods are needed to estimate the aided and unaided pure-tone audiogram. This study focuses on the feasibility aspect of an electrophysiological determination of the hearing thresholds with bone-anchored hearing aid stimulation. Therefore, 10 normal-hearing subjects were provided with a Baha Intenso (Cochlear Ltd.) which was temporarily connected to the Baha Softband (Cochlear Ltd.). Auditory evoked potentials were measured by auditory stimulation paradigm used in clinical routine. The amplitudes, latencies, and thresholds of the resulting auditory brainstem responses (ABR) and the cortically evoked responses (CAEP) were correlated with the respective responses without the use of the Baha Intenso. The recording of ABR and CAEP by delivering the stimuli to the Baha results in response waveforms which are comparable to those evoked by earphone stimulation and appears appropriate to be measured using the Baha Intenso as stimulator. At the ABR recordings a stimulus artifact at higher stimulation levels and a constant latency shift caused by the Baha Intenso has to be considered. The CAEP recording appeared promising as a frequency specific objective method to approve the fitting of bone-anchored hearing aids. At all measurements, the ABR and CAEP thresholds seem to be consistent with the normal hearing of the investigated participants. Thus, a recording of auditory evoked potentials using a Baha is in general possible if specific limitations are considered.
患有传导性或混合性听力损失和单侧耳聋的患者可能受益于依赖骨导听觉刺激的可植入听力设备。然而，对于只有被动合作的患者，需要使用客观方法来估计助听和未助听的纯音听力图。本研究侧重于使用骨锚式助听器刺激进行电生理听力阈值测定的可行性方面。因此，为 10 名正常听力受试者提供了一个 Baha Intenso（Cochlear Ltd.），该设备暂时连接到 Baha Softband（Cochlear Ltd.）。使用临床常规中使用的听觉刺激范式测量听觉诱发电位。所得到的听觉脑干反应（ABR）和皮质诱发反应（CAEP）的振幅、潜伏期和阈值与不使用 Baha Intenso 的相应反应相关联。通过将刺激传递到 Baha 来记录 ABR 和 CAEP 会产生与耳机刺激引起的反应波形相当的反应波形，并且似乎适合使用 Baha Intenso 作为刺激器进行测量。在 ABR 记录中，必须考虑到较高刺激水平的刺激伪影和 Baha Intenso 引起的恒定潜伏期偏移。CAEP 记录似乎很有希望成为一种频率特异性的客观方法，用于验证骨锚式助听器的适配。在所有测量中，ABR 和 CAEP 阈值似乎与研究参与者的正常听力一致。因此，如果考虑到特定的限制，使用 Baha 进行听觉诱发电位记录通常是可行的。
