Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin 53706, USA.
J Voice. 2011 Sep;25(5):519-25. doi: 10.1016/j.jvoice.2010.04.001. Epub 2010 Sep 2.
This study hypothesized that phonation threshold power is measureable and sensitive to changes in the biomechanical properties of the vocal folds. Phonation threshold power was measured in three sample populations of 10 excised canine larynges treated with variable posterior glottal gap, variable bilateral vocal fold elongation, and variable vocal fold lesioning. Posterior glottal gap varied from 0 to 4mm in 0.5 mm intervals. Bilateral vocal fold elongation varied from 0% to 20% in 5% intervals. Vocal fold lesion treatments included unilateral and bilateral vocal fold lesion groups. Each treatment was investigated independently in a sample population of 10 excised canine larynges. Linear regression analysis indicated that phonation threshold power was sensitive to posterior glottal gap (R2=0.298, P<0.001) and weakly to vocal fold elongation (R2=0.052, P=0.003). A one-way repeated measures analysis of variance indicated that phonation threshold power was sensitive to the presence of lesions (P<0.001). Theoretical and experimental evidence presented here suggests that phonation threshold power could be used as a broad screening parameter sensitive to certain changes in the biomechanical properties of the larynx. It has not yet been measured in humans, but because it has the potential to represent the airflow-tissue energy transfer more completely than the phonation threshold pressure or flow alone, it may be a more useful parameter than these and could be used to indicate that laryngeal health is likely abnormal.
本研究假设发声阈能可测量，并对声带的生物力学特性变化敏感。发声阈能在三个样本群体中进行了测量，每个样本群体包含 10 个切除的犬喉，接受不同的后声门隙、双侧声带延长和声带病变处理。后声门隙以 0.5mm 的间隔从 0 到 4mm 变化。双侧声带延长以 5%的间隔从 0%变化到 20%。声带病变处理包括单侧和双侧声带病变组。每个处理在 10 个切除的犬喉样本群体中独立进行研究。线性回归分析表明，发声阈能对后声门隙敏感（R2=0.298，P<0.001），对声带延长较弱敏感（R2=0.052，P=0.003）。单向重复测量方差分析表明，发声阈能对病变的存在敏感（P<0.001）。本文提出的理论和实验证据表明，发声阈能可用作对喉生物力学特性某些变化敏感的广泛筛选参数。它尚未在人类中进行测量，但由于它有可能比单独的发声阈压或流量更完整地代表气流-组织能量传递，因此它可能比这些参数更有用，并可用于指示喉健康可能异常。
