A computational study of systemic hydration in vocal fold collision.
A computational study of systemic hydration in vocal fold collision.
复制标题
DOI：
10.1080/10255842.2013.772591
复制
发表时间：
2014
影响因子：
1.6
通讯作者：
Siegmund T
中科院分区：
文献类型：
--
作者：
Bhattacharya P;Siegmund T
由于发声相关的振动和碰撞，声带（VF）软组织内产生机械应力。这些压力反过来影响VF组织的水合作用，从而影响嗓音健康。在本文中，考虑到完全三维的几何形状，现实的组织和空气的属性，高振幅的振动和碰撞的高可靠性的数值计算。一个隔离的求解器的方法，使用复杂的商业求解器的VF组织和声门气流域。组织的粘弹性能来自于双相制剂。考虑了两种情况，其中组织粘弹性对应于VF组织的流体相的两个不同的体积分数。对于每种情况下，发生的流体静力学应力作为一个结果的振动和碰撞进行了研究。假设VF组织是多孔弹性的，根据流体静力学应力梯度估计VF组织内的间质液运动。整体VF动力学（峰值气流速度，VF变形的幅度，振动频率和接触压力）的计算测量值均在实验观察值的范围内。VF运动导致VF内的机械应力及其对间质液流量的影响进行了详细说明。结果发现，VF的平均变形和振动倾向于增加VF组织的水合状态，而VF碰撞则减少水合。
Mechanical stresses develop within vocal fold (VF) soft tissues, due to phonation-associated vibration and collision. These stresses in turn affect the hydration of VF tissue and thus influence voice health. In this paper, high-fidelty numerical computations are described taking into account fully three-dimensional geometry, realistic tissue and air properties, and high-amplitude vibration and collision. A segregated solver approach is employed, using sophisticated commercial solvers for both the VF tissue and glottal airflow domains. The tissue viscoelastic properties were derived from a biphasic formulation. Two cases were considered, whereby the tissue viscoelastic properties corresponded to two different volume fractions of the fluid phase of the VF tissue. For each case, hydrostatic stresses occurring as a result of vibration and collision were investigated. Assuming the VF tissue to be poroelastic, interstitial fluid movement within VF tissue was estimated from the hydrostatic stress gradient. Computed measures of overall VF dynamics (peak air-flow velocity, magnitude of VF deformation, frequency of vibration and contact pressure) were well within the range of experimentally observed values. The VF motion leading to mechanical stresses within the VFs and their effect on the interstitial fluid flux is detailed. It is found that average deformation and vibration of VFs tends to increase the state of hydration of the VF tissue whereas VF collision works to reduce hydration.
登录
查看更多内容
影响因子：
2.6
作者：
Hanson, Kevin P.;Zhang, Yu;Jiang, Jack J.
通讯作者：
Jiang, Jack J.
影响因子：
2.4
作者：
ALIPOUR, F;SCHERER, RC
通讯作者：
SCHERER, RC
影响因子：
2.2
作者：
Branski, Ryan C.;Verdolini, Katherine;Hebda, Patricia A.
通讯作者：
Hebda, Patricia A.
影响因子：
1.4
作者：
Alipour, F;Montequin, D;Tayama, N
通讯作者：
Tayama, N
影响因子：
3.4
作者：
Chan, RW;Tayama, N
通讯作者：
Tayama, N