Influence of simulated adverse events of the floating mass transducer in a mechanical middle ear model.
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| Title: | Influence of simulated adverse events of the floating mass transducer in a mechanical middle ear model. |
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| Authors: | Graf, Lukas (AUTHOR), Hürzeler, Nathan (AUTHOR), Wey, Lucas (AUTHOR), Mojallal, Hamidreza (AUTHOR), Stieger, Christof (AUTHOR), Arnold, Andreas (AUTHOR) |
| Source: | Acta Oto-Laryngologica. Feb2026, Vol. 146 Issue 2, p176-182. 7p. |
| Subjects: | Prosthetics, In vitro studies, Biomechanics, Human anatomical models, Temporal bone, Complications of prosthesis, Sound, Hearing aids, Vibration (Mechanics), Artificial implants, Middle ear, Descriptive statistics, Ear ossicles, Data analysis software, Transducers, Prosthesis design & construction |
| Abstract (English): | Background: The Vibrant Soundbridge Implant provides multiple options for coupling the Floating Mass Transducer (FMT) to the ossicles. A parametric evaluation in clinical trials is difficult. Aims/Objectives: We studied the vibratory output of the FMT with three couplers—short process, former long process, and current long process—in an acoustic-mechanical middle ear model (AMEM) under simulated impaired coupling conditions. Materials and Methods: The AMEM, with life-sized ossicles, was tested via acoustic and electrical (FMT-) stimulation. Simulated impairments included accidental bone-contact, cable tension, and insufficient connection. Stapedial footplate vibrations were measured using Laser Doppler. Results: Acoustic stimulation generally fulfilled the ASTM standard. With normal coupling, SP- and LP-couplers performed comparable to temporal bone data. Impaired coupling led to various effects: bone-contact reduced the transmission up to 20 dB, cable tension minimally affected SP and current LP couplers but reduced the sound transmission for the former LP coupler. Connecting the SP-coupler with only two of four titanium legs caused a single frequency dip without affecting overall magnitude, whereas off-axis LP fixation reduced the output by 15-20 dB around 1000 Hz. Conclusions and Significance: The AMEM generated reproducible, ASTM-compliant measurements. SP and current LP couplers showed resilience to potential FMT implantation impairments in most frequencies. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): | Vibrant Soundbridge 植入物提供了多种选择, 以便将浮动质量传感器 (FMT) 耦合到听小骨。临床试验中的参数评估很困难。 在模拟的耦合受损条件下, 我们研究了在声学机械中耳模型 (AMEM) 中带有三种耦合器(短突、前长突和当前长突)的 FMT 的振动输出。 通过声学和电学 (FMT) 刺激测试了带有真人大小听小骨的 AMEM。模拟的损伤包括意外骨接触、电缆张力和连接不足。使用激光多普勒测量镫骨踏板振动。 声学刺激通常符合 ASTM 标准。在正常耦合下, SP 和 LP 耦合器的表现与颞骨数据相当。耦合受损会导致各种影响: 骨接触使传输降低高达 20dB, 电缆张力对 SP耦合器 和当前LP 耦合器的影响最小, 但会降低前 LP 耦合器的声音传输。仅用四个钛腿中的两个连接 SP 耦合器会导致单次频率下降但不影响整体幅度, 而离轴 LP 固定会使输出降低 15-20dB 左右(1000 Hz)。 AMEM 生成可重复的、符合 ASTM 标准的测量值。SP 和当前LP 耦合器在大多数频率下都表现出对潜在 FMT 植入损伤的抗性。 [ABSTRACT FROM AUTHOR] |
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| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | Background: The Vibrant Soundbridge Implant provides multiple options for coupling the Floating Mass Transducer (FMT) to the ossicles. A parametric evaluation in clinical trials is difficult. Aims/Objectives: We studied the vibratory output of the FMT with three couplers—short process, former long process, and current long process—in an acoustic-mechanical middle ear model (AMEM) under simulated impaired coupling conditions. Materials and Methods: The AMEM, with life-sized ossicles, was tested via acoustic and electrical (FMT-) stimulation. Simulated impairments included accidental bone-contact, cable tension, and insufficient connection. Stapedial footplate vibrations were measured using Laser Doppler. Results: Acoustic stimulation generally fulfilled the ASTM standard. With normal coupling, SP- and LP-couplers performed comparable to temporal bone data. Impaired coupling led to various effects: bone-contact reduced the transmission up to 20 dB, cable tension minimally affected SP and current LP couplers but reduced the sound transmission for the former LP coupler. Connecting the SP-coupler with only two of four titanium legs caused a single frequency dip without affecting overall magnitude, whereas off-axis LP fixation reduced the output by 15-20 dB around 1000 Hz. Conclusions and Significance: The AMEM generated reproducible, ASTM-compliant measurements. SP and current LP couplers showed resilience to potential FMT implantation impairments in most frequencies. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00016489 |
| DOI: | 10.1080/00016489.2025.2451089 |
