Cabrera Trigo J
Fac. Medicina. Univ. Buenos Aires.
An Otorrinolaringol Ibero Am. 1998;25(4):331-8.
Partial or subtotal surgery of the larynx and its subsequent structural rehabilitation determine a change in the endolaryngeal tract, which is characterized by an irregular aerial passage which brought about a new mechanism for voice production. This mechanism neither report nor adjust to the movements of the healthy larynx in order to preserve the voice qualities of the normal subject. On the contrary, the new voice has inhabitual functions as muscular fasciculations instead of adductive movements, has an expiratory subglottic vector without subglottic pressure and the air proceed turbulent through anfractuous spaces. And besides there are other asymmetric significative changes in regard to the statements of phonatory theories, classic or modern. Before these circumstances it is imperative to offer some hypothesis in order to explain the postsurgical laryngeal voice.
喉部部分或次全手术及其后续结构重建会导致喉内通道发生变化，其特征是气道不规则，这带来了一种新的发声机制。这种机制既不遵循也不适应健康喉部的运动，以保持正常受试者的嗓音特质。相反，新嗓音具有非习惯性功能，如肌肉束颤而非内收运动，具有呼气性声门下向量但无声门下压力，空气通过曲折空间时呈湍流。此外，在经典或现代发声理论的阐述方面还存在其他不对称的显著变化。在这些情况下，必须提出一些假设来解释术后喉部嗓音。
