脉宽响度编码人工耳蜗听觉拟合中电流幅值和多电极刺激对eSRT的影响。

IF 1.4 Q2 OTORHINOLARYNGOLOGY
Behnam Molaee-Ardekani, Pedro Goiana-Martins, Manuel Segovia-Martinez, Leonel Luís
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引用次数: 0

摘要

目的:电诱发镫骨反射阈值(eSRT)等神经生理学测量为人工耳蜗(CI)刺激的个性化反应提供了有价值的见解。本研究评估了在全极性、伪单相、脉宽响度编码刺激中,刺激电流振幅和刺激电极数量对eSRT的影响及其与最舒适响度水平(MCL或c级)的相关性。方法:对17例使用Oticon Medical种植体的成年患者进行研究。在这些植入物中,电流振幅保持恒定,而响度通过脉冲宽度编码。刺激幅度设置为低(临床默认值)和高值,使用单个或多个电极组1,3和5 (G1, G3和G5)横跨五个耳蜗区域,从耳尖到耳底。对各幅值和组eSRT检出率及与MCL的相关性进行区域和整体分析。结果:对侧耳eSRT检出率较高,G3、G5低、高幅值检出率均明显高于G1。当前的振幅促进了eSRT的调用,特别是对于G1和较高mcl的患者。在所有条件下,eSRT和MCL之间的相关性相对较高(r = 0.64-0.87),表明eSRT在低振幅和高振幅下都能准确估计MCL。讨论:在所有条件相互作用(振幅、侧面、电极)中,低振幅对侧G5和高振幅对侧G3是eSRT估计MCL的最佳模式,线性斜率接近1.0,检出率分别为54%和63%。高振幅对侧G5进一步将检出率提高到68%,尽管斜率为0.8,需要校正系数。这些发现为eSRT机制及其在伪单相全极性CI规划中的应用提供了见解。结论:脉宽调制人工耳蜗采用多电极刺激和/或将刺激幅度提高到临床默认值以上,可提高eSRT检出率,且不会显著影响eSRT与MCL的相关系数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The effect of current amplitude and multi-electrode stimulation on eSRT for auditory fitting in cochlear implants with pulse-width loudness coding.

Objective: Neurophysiologic measures like the electrically evoked Stapedius Reflex Threshold (eSRT) offer valuable insights into personalized responses to Cochlear Implant (CI) stimuli. This study evaluates the effects of stimulation current amplitude and the number of stimulating electrodes on eSRT and its correlation with the Most Comfortable Loudness level (MCL or C-level) in all-polar, pseudo-monophasic, pulse-width loudness coded stimulations.

Approach: The study was conducted on seventeen adult patients with Oticon Medical implants. In these implants, current amplitude remains constant while loudness is coded through pulse-width. Stimulation amplitudes were set to low (default clinical) and high values, using single or multi electrode groups of 1, 3, and 5 (G1, G3, and G5) across five cochlear regions, spanning from apical to basal. For each amplitude and group, the eSRT detection rate and correlation with MCL were analyzed regionally and overall.

Results: Higher eSRT detection rates were observed in the contra-lateral ear, with G3 and G5 significantly enhancing detection over G1 for both low and high amplitudes. The current amplitude facilitated eSRT invocation, particularly for G1 and patients with higher MCLs. The correlation between eSRT and MCL was relatively high (r = 0.64-0.87) across all conditions, indicating accurate MCL estimation from eSRT at both low and high amplitudes.

Discussions: Among all condition interactions (amplitude, side, electrodes), low-amplitude contra-lateral G5 and high-amplitude contra-lateral G3 showed optimal modes for estimating MCL from eSRT, with linear slopes near 1.0, and detection rates of 54% and 63%, respectively. High-amplitude contra-lateral G5 further increased detection to 68%, though with a slope of 0.8, requiring a correction factor. These findings provide insights into eSRT mechanisms and its application in pseudo-monophasic all-polar CI programming.

Conclusion: The eSRT detection rate can be improved in pulse-width modulation cochlear implants by using multi-electrode stimulation and/or increasing the stimulation amplitude beyond the default clinical value, without significantly affecting the correlation coefficient between eSRT and MCL.

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来源期刊
COCHLEAR IMPLANTS INTERNATIONAL
COCHLEAR IMPLANTS INTERNATIONAL Medicine-Otorhinolaryngology
CiteScore
3.10
自引率
0.00%
发文量
29
期刊介绍: Cochlear Implants International was founded as an interdisciplinary, peer-reviewed journal in response to the growing number of publications in the field of cochlear implants. It was designed to meet a need to include scientific contributions from all the disciplines that are represented in cochlear implant teams: audiology, medicine and surgery, speech therapy and speech pathology, psychology, hearing therapy, radiology, pathology, engineering and acoustics, teaching, and communication. The aim was to found a truly interdisciplinary journal, representing the full breadth of the field of cochlear implantation.
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