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首页> 外文期刊>Acta Oto-Laryngologica >Round window and promontory movements during bone conduction with different middle ear conditions in Thiel embalmed specimens
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Round window and promontory movements during bone conduction with different middle ear conditions in Thiel embalmed specimens

机译：围窗和骨膜传导期间的围栏和海头运动，在泰尔禁止标本中的不同中耳条件

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摘要

Background: Thiel conservation is mainly based on a watery solution of salts. We have shown that bone conduction (BC) evokes motion in normal middle ears of Thiel embalmed specimens that is comparable to the motion for other cadaveric models.Aims/Objectives: We evaluated whether promontory and round window (RW) motion identifies differences in BC transmission for different middle ear conditions.Methods: We investigated the conditions of mobile ossicle chain, cement-fixed stapes and stapedectomy in seven ears. A retroauricular bone anchored hearing system provided BC stimulation. The motions of the promontory and the RW were measured using single point laser Doppler vibrometer (LDV, HLV1000, Polytec).Results: The averaged differences between the conditions were small for RW motion and for promontory motion. However, for RW motion we found differences of more than one standard deviation at some frequencies. These differences in RW motion were more apparent when we limited the analysis to three selected specimens.Conclusions and Significance: Extracochlear measurement of the RW motion with LDV allowed differentiation between BC for different middle ear conditions. These changes could be detected best in a small frequency range in selected specimens. Promontory motion could not be used to differentiate between different conditions of the middle ear.ABBREVIATIONS: LDV: laser Doppler vibrometry; Prom: cochlear promontory; RW: round window; ST: stapes; TM: tympanic membrane; VProm: velocity of the promontory; VRW: velocity of the round window
机译：背景：Thiel Presentation主要基于盐的水溶液。我们已经表明，骨传导（BC）唤起了与其他尸体模型的动作相当的泰尔禁止标本的正常中耳的运动。对于不同的中耳条件。方法：我们调查了七只耳朵中的移动凿子链，水泥固定的镫骨和镫形切除术的条件。 Retroaulicular骨锚定听证系统提供了BC刺激。使用单点激光多普勒振动计（LDV，HLV1000，PolyTEC）测量海角和RW的动作。结果：条件之间的平均差异对于RW运动和海角运动。然而，对于RW Motion，我们发现在某些频率下的一个以上标准偏差的差异。当我们将分析限制为三种选定的试样时，rw运动的这些差异更加明显。结论和意义：具有LDV的RW运动的eXtracochlear测量，BC在不同的中耳条件下的差异。可以在所选样本中的小频率范围内最佳地检测这些变化。海角运动不能用于区分中耳的不同条件.Abbreviations：LDV：激光多普勒振动器;舞会：耳蜗海角; rw：圆窗;圣：镫骨; TM：鼓膜膜; VPROM：海角的速度; VRW：圆形窗口的速度

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