Departamento de Engenharia Mecânica, Campus Universitário Trindade, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil.
Centro de Pesquisas Oncológicas, Rodovia Admar Gonzaga 655, Florianópolis, Santa Catarina 88034-000, Brazil.
J Acoust Soc Am. 2021 Mar;149(3):1979. doi: 10.1121/10.0003817.
Laryngeal cancer afflicts a large number of people worldwide, and some will need surgery to contain the disease. Currently, tracheoesophageal (TE) speech is a common method of voice rehabilitation for patients who have had their larynges excised. However, despite the relatively high success rate, not everyone is capable of producing the TE voice, usually due to the tonicity of the pharyngoesophageal segment (PES). The present work studies how the tonicity of the muscles of the PES affects TE phonation, focusing mainly on hypotonicity. A simplified collapsible channel model is used. Steady-state solutions are obtained and a linear stability analysis is performed. It is then shown that the steady-state solutions of the model are similar to the wide variety of possible PES configurations that are reported in the literature. The linear stability analysis results provide a simple expression for the estimation of the minimum tonicity required for self-sustained oscillations of the PES.
喉癌影响全球大量人群，部分患者需要手术治疗以控制疾病。目前，气管食管（TE）语音是喉切除术后患者常用的一种语音康复方法。然而，尽管成功率相对较高，但并非每个人都能发出 TE 语音，通常是由于咽食管段（PES）的紧张度。本工作研究了 PES 肌肉的紧张度如何影响 TE 发声，主要关注低紧张度。采用简化的可塌陷通道模型。得到稳态解，并进行线性稳定性分析。然后表明，模型的稳态解与文献中报道的各种可能的 PES 构型相似。线性稳定性分析结果为估计 PES 自激振荡所需的最小紧张度提供了一个简单的表达式。
