The Effect of Bolus Consistency on Hyoid Velocity in Healthy Swallowing.
The Effect of Bolus Consistency on Hyoid Velocity in Healthy Swallowing.
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DOI：
10.1007/s00455-015-9621-6
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发表时间：
2015-08
期刊：
影响因子：
2.6
通讯作者：
Steele CM
中科院分区：
文献类型：
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作者：
Nagy A;Molfenter SM;Péladeau-Pigeon M;Stokely S;Steele CM
本研究的目的是确定是否测量舌骨速度增加时，吞咽液体较厚的一致性在一个恒定的体积。20名健康年轻参与者（平均年龄31.5岁）的性别平衡样本，每人在3 μ l中吞下3个5 ml体积的大丸剂（钡剂、稀钡剂和花蜜厚钡剂）。使用舌骨位置的逐帧跟踪，我们识别了舌骨运动的开始和峰值，并导出了速度的测量值（即，以解剖学标准化单位表示的距离，即，X、Y和XY运动方向的C2-4椎骨距离的%除以持续时间（ms）。峰值舌骨速度也确定了每个运动方向。在确定了显著差异的情况下，进一步探讨了舌骨运动距离和持续时间的分量测量，以确定用于改变速度的策略。结果表明，增加速度和更高的峰值速度与花蜜厚的刺激相比，薄和薄的刺激。这是通过吞咽花蜜粘稠液体时每单位时间更大的舌骨运动距离的主要策略实现的。这些结果指出了一种机制，增稠的液体可以通过促进更及时的喉前庭关闭来改善气道保护。
The aim of this study was to determine whether measures of hyoid velocity increase when swallowing liquids of thicker consistency at a constant volume. A gender-balanced sample of 20 healthy young participants (mean age 31.5) each swallowed 3 boluses of 5ml volume in 3 consistencies (ultrathin, thin, and nectar-thick barium). Using frame by frame tracking of hyoid position, we identified the onset and peak of the hyoid movement and derived measures of velocity (i.e., distance in anatomically normalized units, i.e., % of the C2–4 vertebral distance, divided by duration in ms) for the X, Y and XY movement directions. Peak hyoid velocity was also identified for each movement direction. Where significant differences were identified, the component measures of hyoid movement distance and duration were further explored to determine the strategies used to alter velocity. The results showed increased velocities and higher peak velocities with the nectar thick stimuli compared to thin and ultrathin stimuli. This was achieved by a primary strategy of larger hyoid movement distances per unit of time when swallowing nectar-thick liquids.. These results point to one mechanism by which thickened liquids may contribute to improved airway protection, by facilitating more-timely laryngeal vestibule closure.