PDF(Pubmed)
Abstract：
OBJECTIVE: This study aimed to investigate the impact of the implant\'s vertical location during Type 1 Thyroplasty (T1T) on acoustics and glottal aerodynamics using excised canine larynx model, providing insights into the optimal technique for treating unilateral vocal fold paralysis (UVFP).
METHODS: Measurements were conducted in six excised canine larynges using Silastic implants. Two implant locations, glottal and infraglottal, were tested for each larynx at low and high subglottal pressure levels. Acoustic and intraglottal flow velocity field measurements were taken to assess vocal efficiency (VE), cepstral peak prominence (CPP), and the development of intraglottal vortices.
RESULTS: The results indicated that the implant\'s vertical location significantly influenced vocal efficiency (p = 0.045), with the infraglottal implant generally yielding higher VE values. The effect on CPP was not statistically significant (p = 0.234). Intraglottal velocity field measurements demonstrated larger glottal divergence angles and stronger vortices with the infraglottal implant.
CONCLUSIONS: The findings suggest that medializing the paralyzed fold at the infraglottal level rather than the glottal level can lead to improved vocal efficiency. The observed larger divergence angles and stronger intraglottal vortices with infraglottal medialization may enhance voice outcomes in UVFP patients. These findings have important implications for optimizing T1T procedures and improving voice quality in individuals with UVFP. Further research is warranted to validate these results in clinical settings.
METHODS: Measurements were conducted in six excised canine larynges using Silastic implants. Two implant locations, glottal and infraglottal, were tested for each larynx at low and high subglottal pressure levels. Acoustic and intraglottal flow velocity field measurements were taken to assess vocal efficiency (VE), cepstral peak prominence (CPP), and the development of intraglottal vortices.
RESULTS: The results indicated that the implant\'s vertical location significantly influenced vocal efficiency (p = 0.045), with the infraglottal implant generally yielding higher VE values. The effect on CPP was not statistically significant (p = 0.234). Intraglottal velocity field measurements demonstrated larger glottal divergence angles and stronger vortices with the infraglottal implant.
CONCLUSIONS: The findings suggest that medializing the paralyzed fold at the infraglottal level rather than the glottal level can lead to improved vocal efficiency. The observed larger divergence angles and stronger intraglottal vortices with infraglottal medialization may enhance voice outcomes in UVFP patients. These findings have important implications for optimizing T1T procedures and improving voice quality in individuals with UVFP. Further research is warranted to validate these results in clinical settings.
摘要：
目的：本研究旨在研究1型甲状腺成形术（T1T）期间植入物的垂直位置对声学和声门空气动力学的影响，使用切除的犬喉模型，提供对治疗单侧声带麻痹（UVFP）的最佳技术的见解。
方法：使用Silastic植入物在六个切除的犬科喉中进行测量。两个植入位置,声门和舌下，在低和高声门下压水平下对每个喉进行测试。进行了声学和声门内流速场测量以评估声音效率（VE），倒谱峰突出度(CPP)，和声门内涡旋的发展。
结果：结果表明，植入物的垂直位置显着影响声乐效率（p=0.045），与口内植入物通常产生较高的VE值。对CPP的影响没有统计学意义（p=0.234）。口内速度场测量表明，口内植入物的声门发散角较大，涡流较强。
结论：研究结果表明，在舌下水平而不是声门水平调节麻痹褶皱可以提高发声效率。在UVFP患者中，观察到的较大的发散角和较强的舌内涡流以及舌下的中音可能会增强语音结果。这些发现对于优化T1T程序和改善UVFP患者的语音质量具有重要意义。需要进一步的研究以在临床环境中验证这些结果。
方法：使用Silastic植入物在六个切除的犬科喉中进行测量。两个植入位置,声门和舌下，在低和高声门下压水平下对每个喉进行测试。进行了声学和声门内流速场测量以评估声音效率（VE），倒谱峰突出度(CPP)，和声门内涡旋的发展。
结果：结果表明，植入物的垂直位置显着影响声乐效率（p=0.045），与口内植入物通常产生较高的VE值。对CPP的影响没有统计学意义（p=0.234）。口内速度场测量表明，口内植入物的声门发散角较大，涡流较强。
结论：研究结果表明，在舌下水平而不是声门水平调节麻痹褶皱可以提高发声效率。在UVFP患者中，观察到的较大的发散角和较强的舌内涡流以及舌下的中音可能会增强语音结果。这些发现对于优化T1T程序和改善UVFP患者的语音质量具有重要意义。需要进一步的研究以在临床环境中验证这些结果。
