一側声帯麻痺症例277例について, 発声時の披裂部と喉頭蓋の狭窄運動のメカニズムを検討した。方法としてビデオ喉頭内視鏡で発声中の狭窄運動の様式や程度を観察した。その結果, 277例中113例(41%)に何らかの狭窄運動が出現した。狭窄運動の程度が増大するほど, 年齢は高くなる傾向が有意に認められた。また, 経皮的声帯内シリコン注入術を施行した153例について, 施行前後で狭窄運動に変化があるか検討した。施行前後で狭窄運動に有意に改善が認められた。経皮的声帯内シリコン注入術施行前に狭窄運動を認めた65例中52例(80%)に改善が認められた。

The purpose of this study is to clarify the mechanism of the anteroposterior laryngeal squeezing during phonation. We assessed the type and degree of anteroposterior laryngeal squeezing during phonation by fiber-stroboscopy in 277 cases of unilateral laryngeal nerve paralysis. The results were summarized as follows : (1) In 113 cases of the 277 assessed, anteroposterior laryngeal squeezing occurred during phonation (41%). (2) As compared to non-anteroposterior laryngeal squeezing, the incidence of marked anteroposterior laryngeal squeezing significantly increased with age in the later part of life. (3) In 153 cases in which a silicon injection was perfomed, we compared the degree of anteroposterior laryngeal squeezing before and after the silicon injection. It is notable that following a silicon injection the degree of anteroposterior laryngeal squeezing was reduced in 52 (80%) out of the 65 cases in which anteroposterior laryngeal squeezing was observed prior to injection.

国立情報学研究所で電子化