Comparison between thyroplasty type I andArytenoid rotation: a study of vocal fold vibration using excised human larynges

Tsuji, Domingos Hiroshi; Almeida, Edigar Rezende de; Sennes, Luiz Ubirajara; Butugan, Ossamu; Pinho, Sílvia Maria Rebelo

doi:10.1067/s0892-1997(03)00071-7

Cited by 11 publications

(9 citation statements)

References 27 publications

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“…Participants were students of the University of South Carolina (USC) in Columbia, and friends, family, and colleagues from both USC and the Presbyterian Hospital in Charlotte. The 52 participants were age and gender matched: 24 males and 28 females were divided among three age ranges (18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42)(43)(44)(45)(46)(47)(48)(49), and 50-65 years). Since participants were sought by the research team, a preliminary exclusion was made of persons who the team considered to be not vocally normal.…”

Section: Methods Participantsmentioning

confidence: 99%

“…Features of mucosal wave are a stringent test of success when attempting to achieve glottal closure without permanent tension or stiffness, which is important for improving vocal quality. [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44] Preliminary studies of the horizontal and vertical displacements, velocity, and vertical phase of the mucosal wave via HSV have been accomplished using excised canine larynges. [45][46][47] The distinction of mucosal wave between normophonic speakers and persons with voice disorders has been investigated via stroboscopy.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mucosal Wave: A Normophonic Study Across Visualization Techniques

Shaw

Deliyski

2008

Journal of Voice

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Section: Methods Participantsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mucosal Wave: A Normophonic Study Across Visualization Techniques

Shaw

Deliyski

2008

Journal of Voice

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“…The larynges were excised according to the protocol described by Jiang and Titze (24). After excision, the larynges were examined for evidence of trauma or disorders and frozen in 0.9% saline solution.…”

Section: Methodsmentioning

confidence: 99%

Multiparameter Analysis of Titanium Vocal Fold Medializing Implant in an Excised Larynx Model

Witt¹,

Hoffman²,

Friedrich³

et al. 2010

Ann Otol Rhinol Laryngol

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Objective Evaluate the efficacy of the titanium vocal fold medializing implant (TVFMI) for the treatment of unilateral vocal fold paralysis (UVFP) based on acoustic, aerodynamic, and mucosal wave measurements in an excised larynx setup. Methods Measurements were recorded on eight excised canine larynges with simulated UVFP before and after medialization with the TVFMI. Results Phonation threshold flow (PTF) and phonation threshold power (PTW) decreased significantly after medialization (p<0.001; p=0.008). Phonation threshold pressure (PTP) also decreased, but this difference was not significant (p=0.081). Percent jitter and percent shimmer decreased significantly after medialization (p=0.005; p=0.034). Signal to noise ratio (SNR) increased significantly (p=0.05). Differences in mucosal wave characteristics were discernable, but not significant. Phase difference between the normal and paralyzed vocal fold and amplitude of the paralyzed vocal fold decreased (p=0.15; p=0.78). Glottal gap decreased significantly (p=0.004). Conclusions The TVFMI was effective in achieving vocal fold medialization, improving vocal aerodynamic and acoustic characteristics of phonation significantly and mucosal wave characteristics discernibly. This study provides objective, quantitative support for the use of the TVFMI in improving vocal function in patients with unilateral vocal fold paralysis.

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“…[93] compared the medialization of vocal folds with type I thyroplasty (TPI) to arytenoid rotation using ten excised human larynges. Each vocal fold was treated with either TPI or arytenoid rotation (AR), so that direct comparison was possible.…”

Section: Excised Human and Animal Larynx Experimentsmentioning

confidence: 99%

Experiments on Analysing Voice Production: Excised (Human, Animal) and In Vivo (Animal) Approaches

Döllinger¹,

Kobler²,

Berry³

et al. 2011

CBIO

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Experiments on human and on animal excised specimens as well as in vivo animal preparations are so far the most realistic approaches to simulate the in vivo process of human phonation. These experiments do not have the disadvantage of limited space within the neck and enable studies of the actual organ necessary for phonation, i.e., the larynx. The studies additionally allow the analysis of flow, vocal fold dynamics, and resulting acoustics in relation to well-defined laryngeal alterations. Purpose of Review This paper provides an overview of the applications and usefulness of excised (human/animal) specimen and in vivo animal experiments in voice research. These experiments have enabled visualization and analysis of dehydration effects, vocal fold scarring, bifurcation and chaotic vibrations, three-dimensional vibrations, aerodynamic effects, and mucosal wave propagation along the medial surface. Quantitative data will be shown to give an overview of measured laryngeal parameter values. As yet, a full understanding of all existing interactions in voice production has not been achieved, and thus, where possible, we try to indicate areas needing further study. Recent Findings A further motivation behind this review is to highlight recent findings and technologies related to the study of vocal fold dynamics and its applications. For example, studies of interactions between vocal tract airflow and generation of acoustics have recently shown that airflow superior to the glottis is governed by not only vocal fold dynamics but also by subglottal and supraglottal structures. In addition, promising new methods to investigate kinematics and dynamics have been reported recently, including dynamic optical coherence tomography, X-ray stroboscopy and three-dimensional reconstruction with laser projection systems. Finally, we touch on the relevance of vocal fold dynamics to clinical laryngology and to clinically-oriented research.

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Comparison between thyroplasty type I andArytenoid rotation: a study of vocal fold vibration using excised human larynges

Cited by 11 publications

References 27 publications

Mucosal Wave: A Normophonic Study Across Visualization Techniques

Mucosal Wave: A Normophonic Study Across Visualization Techniques

Multiparameter Analysis of Titanium Vocal Fold Medializing Implant in an Excised Larynx Model

Experiments on Analysing Voice Production: Excised (Human, Animal) and In Vivo (Animal) Approaches

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