Experimental quantification of the vibrant soundbridge stapes head (SH-) coupler in human cadaveric temporal bones.

IF 1.8 3区 医学 Q2 AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY International Journal of Audiology Pub Date : 2024-12-09 DOI:10.1080/14992027.2024.2434905
Lukas Graf, Jonas Lochner, Hamidreza Mojallal, Andreas Arnold, Flurin Honegger, Christof Stieger
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Abstract

Background: The "floating mass transducer" (FMT) of the Vibrant Soundbridge was initially attached to the long process of the incus (LP). In patients missing an incus, coupling to the stapes head using the Vibroplasty CliP-coupler is used. Its main limitation is the height, leading to potential contact with the tympanic membrane. The new stapes head (SH)-coupler reduces the functional height but tilts the stimulation angle by 30°. We investigated the SH-coupler's magnitude and sound transmission quality compared to the LP-coupler.

Methods: Laser Doppler vibrometry was used on 10 cadaveric human temporal bones. Measurements of the stapes and round window motion were taken for electrical (FMT-) stimulation during application of both couplers.

Results: At the round window, the SH-coupler showed a significantly higher gain magnitude than the LP-coupler (+ 13.4 dB over 1023-3577Hz). At low frequencies (382-500Hz), the SH-coupler gain was significantly lower (-9.9 dB). Total harmonic distortions >10% at 100 dB HLeq were recorded in 3.4% of the SH- and 7.4% of the LP-couplers above 500 Hz.

Conclusion: The SH-coupler's performance exceeds the LP-coupler in middle and high frequencies and is comparable to and a good alternative to the CliP-coupler, dependent on the individual anatomy.

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人尸体颞骨中振动音桥镫骨头(SH-)耦合器的实验定量。
背景:动态声桥的“浮动质量传感器”(FMT)最初附着在砧板的长过程上。对于缺少砧骨的患者,使用振动成形术夹耦合器连接镫骨头。它的主要限制是高度,导致与鼓膜的潜在接触。新的镫骨头(SH)耦合器降低了功能高度,但将增产角度倾斜了30°。与lp耦合器相比,我们研究了sh耦合器的大小和声音传输质量。方法:采用激光多普勒振动仪对10具尸体颞骨进行测量。在应用两种耦合器期间,测量了镫骨和圆窗运动,以进行电刺激(FMT-)。结果:在圆窗处,sh -耦合器的增益幅度明显高于lp -耦合器(1023-3577Hz范围内+ 13.4 dB)。在低频(382-500Hz), sh -耦合器增益显著降低(-9.9 dB)。在500 Hz以上,3.4%的SH-和7.4%的lp -耦合器记录了100 dB HLeq下总谐波畸变bbbb10 %。结论:sh -耦合器在中高频的性能优于lp -耦合器,可与clip -耦合器相媲美,并可作为clip -耦合器的良好替代品,具体取决于个体解剖结构。
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来源期刊
International Journal of Audiology
International Journal of Audiology 医学-耳鼻喉科学
CiteScore
4.90
自引率
14.80%
发文量
133
审稿时长
4-8 weeks
期刊介绍: International Journal of Audiology is committed to furthering development of a scientifically robust evidence base for audiology. The journal is published by the British Society of Audiology, the International Society of Audiology and the Nordic Audiological Society.
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