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首页> 外文期刊>The Laryngoscope: A Medical Journal for Clinical and Research Contributions in Otolaryngology, Head and Neck Medicine and Surgery, Facial Plastic and Reconstructive Surgery .. >Acoustic properties of different cartilage reconstruction techniques of the tympanic membrane.
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Acoustic properties of different cartilage reconstruction techniques of the tympanic membrane.

机译：鼓膜的不同软骨重建技术的声学特性。

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OBJECTIVES/HYPOTHESIS The use of cartilage in reconstruction of the tympanic membrane has been established especially in cases such as tubal dysfunction and adhesive processes. Cartilage offers the advantage of higher mechanical stability compared with membranous transplants but may alter the acoustic transfer characteristics of the graft. Apart from material properties, it can be assumed that, also, the microsurgical reconstruction technique might influence the sound transmission properties of the reconstructed tympanic membrane. The purpose of the study was to investigate the acoustic transfer characteristics of different cartilage transplants being typically used in different reconstruction techniques of the tympanic membrane.METHODS Cartilage plates of different thicknesses (1.0, 0.7, 0.5, and 0.3 mm), cartilage palisades, and cartilage island transplants of varying size were investigated by means of an ear canal-tympanic membrane model. In contrast to former single-point measurements, sound-induced vibrational amplitudes of the entire transplant were measured by scanning laser Doppler vibrometry (measuring points, n = 133) (PSV-200, Polytec, Waldbronn, Germany). Frequency response functions (displacement vs. sound pressure) of all measured points were determined in the frequency range of 200 Hz to 4 kHz for the different transplants.RESULTS Cutting thick cartilage transplants into thin plates or palisades decreased the first resonance frequency and increased its amplitude, reflecting improved sound transmission properties of the transplant. From an acoustical point of view, the 0.5-mm cartilage plate seems preferable compared with the palisade technique. Cartilage island techniques showed vibration characteristics superior to plate or palisade techniques.CONCLUSIONS Apart from material characteristics, the sound transmission properties of the reconstructed tympanic membrane are strongly influenced by the reconstruction technique. The choice of the surgical technique should consider requirements based on mechanical stability and acoustic transfer characteristics of the transplant.
机译：目的/假说已经建立了在重建鼓膜中使用软骨的方法，特别是在输卵管功能障碍和粘附过程等情况下。与膜移植相比，软骨具有更高的机械稳定性的优势，但可能会改变移植物的声传递特性。除了材料特性外，还可以假设显微外科重建技术可能会影响重建的鼓膜的声音传输特性。该研究的目的是研究通常用于不同鼓膜重建技术的不同软骨移植物的声传递特性.METHODS厚度不同（1.0、0.7、0.5和0.3 mm）的软骨板，软骨栅栏和通过耳道鼓膜模型研究了大小不同的软骨岛移植物。与以前的单点测量相反，通过扫描激光多普勒振动法（测量点，n = 133）（PSV-200，Polytec，Waldbronn，德国）测量了整个移植物的声诱发振动幅度。在不同的移植物的200 Hz至4 kHz频率范围内确定了所有测量点的频率响应函数（位移与声压）。结果将厚的软骨移植物切割成薄板或栅栏会降低第一个共振频率并增加其振幅，反映了移植物改善的声音传输特性。从声学的角度来看，与栅栏技术相比，0.5 mm的软骨板似乎更可取。软骨岛技术的振动特性优于平板或栅栏技术。结论除了材料特性以外，重建鼓膜的声传输特性还受到重建技术的强烈影响。手术技术的选择应考虑基于移植物的机械稳定性和声学传递特性的要求。

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