Physiological evidence of supracricoid laryngectomy with CHEP

1）环杓单位的肌电图：杓状软骨的活动是由于杓间肌和环杓后肌之间的相互作用。杓间肌和环杓后肌之间的相互作用也能够在环状软骨上喉切除术联合环舌骨会厌固定术后维持术后喉功能。2）CAU的MDCT分析：单侧杓状肌的前移在补偿无法实现新声门闭合方面起着重要作用。这两个结果表明，单独的单侧杓状软骨能够实现足够的新声门狭窄，以补偿切除的杓状软骨。三维分析有助于评价环状软骨上喉切除联合环舌骨会厌固定术后新声门的生理状态。3）新声门的高速数字成像喉镜检查：高速数字成像分析可有效定位环状软骨上喉切除联合环舌骨会厌固定术患者的发声部位。这是第一项使用高速数字成像系统明确识别此类患者的新声门声源的研究。

Three projects were conducted and the results reported.1) Electromyography of cricoarytenoid unit : Mobility of the arytenoid was attributed to interaction between the interarytenoid muscle and posterior cricoarytenoid muscle. Reciprocal interaction between the interarytenoid muscle and posterior cricoarytenoid muscle alone is also capable of maintaining post-operative laryngeal functions after supracricoid laryngectomy with cricohyoidoepiglottopexy.2) MDCT analysis of CAU : Anterior shifting of the unilateral arytenoid plays an important role in compensating for the inability to achieve neoglottic closure. These two results demonstrate that the unilateral arytenoid alone is capable of achieving sufficient neoglottic narrowing to compensate for the resected arytenoid. Three-dimensional analysis was useful to evaluate the physiological status of the neoglottis after supracricoid laryngectomy with cricohyoidoepiglottopexy.3) High-speed digital imaging laryngoscopy of neoglottis : High-speed digital imaging analysis is effective in locating the sites responsible for voice production in patients who have undergone supracricoid laryngectomy with cricohyoidoepiglottopexy. This is the first study to clearly identify the neoglottal sound source in such patients, using a high-speed digital imaging system.