Dynamic Biomechanical Analysis of Vocal Folds Using Pipette Aspiration Technique.

Dynamic Biomechanical Analysis of Vocal Folds Using Pipette Aspiration Technique.
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DOI:
10.3390/s21092923
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发表时间:
2021-04-21
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Sutor A
Sutor A
中科院分区:
其他
文献类型:
--
作者:
Scheible F;Lamprecht R;Semmler M;Sutor A

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发声过程是声门压力、声带弹性和张力相互作用的复杂过程。声带的材料特性仍然没有得到充分的研究,因为软组织的材料特性的测定往往是困难的,并连接到广泛的实验设置。为了阐明这一研究较少的领域,在这项工作中,利用动态移液管抽吸技术来测量在100-1000 Hz的频率范围内的弹性。利用激励压力与组织运动之间的相位差来评估复合弹性。动态移液管抽吸装置已经小型化,以用于未来的体内应用。将该技术应用于3种不同的猪喉4 h和1d死后,以调查随着时间的推移,组织的恶化和分析声带对之间的弹性值的相关性。结果发现,声带对确实有不同的绝对弹性值,但类似的趋势。这导致了这样的假设,即这些趋势对于发声比具有相同的绝对值更重要。
The voice producing process is a complex interplay between glottal pressure, vocal folds, their elasticity and tension. The material properties of vocal folds are still insufficiently studied, because the determination of material properties in soft tissues is often difficult and connected to extensive experimental setups. To shed light on this less researched area, in this work, a dynamic pipette aspiration technique is utilized to measure the elasticity in a frequency range of 100–1000 Hz. The complex elasticity could be assessed with the phase shift between exciting pressure and tissue movement. The dynamic pipette aspiration setup has been miniaturized with regard to a future in-vivo application. The techniques were applied on 3 different porcine larynges 4 h and 1 d postmortem, in order to investigate the deterioration of the tissue over time and analyze correlation in elasticity values between vocal fold pairs. It was found that vocal fold pairs do have different absolute elasticity values but similar trends. This leads to the assumption that those trends are more important for phonation than having same absolute values.
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