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https://www.readbyqxmd.com/read/28097934/automatic-and-quantitative-measurement-of-laryngeal-video-stroboscopic-images
#1
Chung-Feng Jeffrey Kuo, Joseph Kuo, Shang-Wun Hsiao, Chi-Lung Lee, Jih-Chin Lee, Bo-Han Ke
The laryngeal video stroboscope is an important instrument for physicians to analyze abnormalities and diseases in the glottal area. Stroboscope has been widely used around the world. However, without quantized indices, physicians can only make subjective judgment on glottal images. We designed a new laser projection marking module and applied it onto the laryngeal video stroboscope to provide scale conversion reference parameters for glottal imaging and to convert the physiological parameters of glottis. Image processing technology was used to segment the important image regions of interest...
January 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28095928/one-hundred-years-of-external-approach-medialisation-thyroplasty
#2
V E Crolley, N Gibbins
It has been 100 years since Erwin Payr first developed an operation to improve the effects of a paralysed vocal fold, and operations based on this technique are still in use today. This technique, medialisation thyroplasty, aims to improve the symptoms caused by vocal fold palsy by realigning the lateralised vocal fold into the midline. Whilst the effects of vocal fold palsy were recognised in antiquity, it was only with the development of indirect laryngoscopy in the late nineteenth century that the vocal fold paralysis could be identified as an aetiology for poor phonation and dysphagia...
January 18, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28089485/perceptual-error-analysis-of-human-and-synthesized-voices
#3
Marina Englert, Glaucya Madazio, Ingrid Gielow, Jorge Lucero, Mara Behlau
OBJECTIVE/HYPOTHESIS: To assess the quality of synthesized voices through listeners' skills in discriminating human and synthesized voices. STUDY DESIGN: Prospective study. METHODS: Eighteen human voices with different types and degrees of deviation (roughness, breathiness, and strain, with three degrees of deviation: mild, moderate, and severe) were selected by three voice specialists. Synthesized samples with the same deviations of human voices were produced by the VoiceSim system...
January 12, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28089390/quantitative-evaluation-of-the-in-vivo-vocal-fold-medial-surface-shape
#4
Andrew M Vahabzadeh-Hagh, Zhaoyan Zhang, Dinesh K Chhetri
OBJECTIVES/HYPOTHESIS: Glottal insufficiency is a common clinical problem in otolaryngology and medialization laryngoplasty (ML) procedures remain the primary treatment modality. Although the goal of ML is to restore physiologic glottal posture and achieve optimal phonation, this posture has not been directly measured. In this study, we assessed glottal medial surface contour changes with selective activation of the intrinsic laryngeal muscles (ILMs). STUDY DESIGN: Basic science study using an in vivo canine hemilarynx model...
January 12, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28073284/posterior-glottic-insufficiency-in-children
#5
Reema Padia, Marshall E Smith
BACKGROUND: Dysphonia secondary to posterior glottic insufficiency (PGI) can be difficult to identify and correct. Inadequate arytenoid approximation from medial arytenoid erosion results in a breathy, soft voice. The anatomical location of the gap is difficult to correct by vocal fold injection laryngoplasty. This study reviews the presentation, evaluation, and treatment for pediatric patients who were identified with PGI. METHODS: An Institutional Review Board-approved chart review was performed on all patients who were diagnosed with PGI at our institution from 2013 to 2015...
January 1, 2017: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/28072470/sonographic-dynamic-description-of-the-laryngeal-tract-definition-of-quantitative-measures-to-characterize-vocal-fold-motion-and-estimation-of-their-normal-values
#6
Héloïse Bergeret-Cassagne, Diane S Lazard, Muriel Lefort, Siham Hachi, Laurence Leenhardt, Fabrice Menegaux, Gilles Russ, Christophe Trésallet, Frédérique Frouin
Vocal fold motion was analyzed during free breathing using two-dimensional dynamic ultrasound imaging. Two cadavers were first analyzed to define easily identifiable landmarks. Motion of the laryngeal tract was then analyzed in an axial plane. Left and right arytenoids and thyroid cartilage were defined on images corresponding to abduction and adduction of the laryngeal tract. Associated area measurements were established for 50 healthy subjects. All area indices were significantly larger during abduction than adduction...
January 10, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28062093/resonance-tube-or-lax-vox
#7
Jaana Tyrmi, Vojtěch Radolf, Jaromír Horáček, Anne-Maria Laukkanen
OBJECTIVE: This study compares the flow resistance of Resonance tube (RT) and Lax Vox tube (LVT) when submerged 2 cm and 10 cm in water, as well as phonation into the tubes in these conditions. METHODS: In the in vitro experiment, the air pressure for flow rates of 60-600 mL/s was measured at the tube inlet, when the outer end of the tube was submerged 2 cm and 10 cm below water surface in 30°, 45°, and 90° angle. In the in vivo experiment, 14 subjects phonated in habitual loudness and loudly into both tubes, with the outer end 2 cm and 10 cm in water...
January 3, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28059441/neuromuscular-compensation-mechanisms-in-vocal-fold-paralysis-and-paresis
#8
Karuna Dewan, Andrew Vahabzadeh-Hagh, Donna Soofer, Dinesh K Chhetri
OBJECTIVES/HYPOTHESIS: Vocal fold paresis and paralysis are common conditions. Treatment options include augmentation laryngoplasty and voice therapy. The optimal management for this condition is unclear. The objective of this study was to assess possible neuromuscular compensation mechanisms that could potentially be used in the treatment of vocal fold paresis and paralysis. STUDY DESIGN: In vivo canine model. METHODS: In an in vivo canine model, we examined three conditions: 1) unilateral right recurrent laryngeal nerve (RLN) paresis and paralysis, 2) unilateral superior laryngeal nerve (SLN) paralysis, and 3) unilateral vagal nerve paresis and paralysis...
January 6, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28045635/association-between-laryngeal-pepsin-levels-and-the-presence-of-vocal-fold-polyps
#9
Lu Wang, Jia-Jie Tan, Ting Wu, Rui Zhang, Jia-Nuan Wu, Fang-Fang Zeng, You-Li Liu, Xiao-Yan Han, Yan-Fei Li, Xiang-Ping Li
Objective To determine whether pepsin, the main component of refluxed gastric contents, is significantly associated with vocal fold polyps and to evaluate the diagnostic value of pepsin in vocal fold polyps' tissues. Study Design Cross-sectional study. Setting Nanfang Hospital of Southern Medical University. Subjects and Methods The study included 32 patients with vocal fold polyps and 16 healthy controls between 2011 and 2012. Reflux symptom index and reflux finding score assessments, 24-hour combined multichannel intraluminal impedance and pH monitoring, and biopsy of the vocal fold polyp tissues or posterior laryngeal mucosa (healthy controls) for immunohistochemical pepsin staining were performed...
January 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28040341/the-influence-of-vowels-on-vocal-fold-dynamics-in-the-tenor-s-passaggio
#10
Matthias Echternach, Fabian Burk, Marie Köberlein, Michael Burdumy, Michael Döllinger, Bernhard Richter
INTRODUCTION: The influence of vowels on the frequency region where registration events in male voices usually occur (passaggio) has not yet been clarified. Particularly, for tenors who frequently have to sing across the passaggio, it might be assumed that the vowel quality has an influence on the stability of phonation. METHODS: In this investigation, six professionally trained Western classical tenors performed a glide from A3 (220 Hz) to A4 (440 Hz) and were recorded using high-speed videoendoscopy at 20,000 fps via transnasal flexible endoscopy...
December 28, 2016: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28034706/vagal-and-recurrent-laryngeal-nerves-neuromonitoring-during-thyroidectomy-and-parathyroidectomy-a-prospective-study
#11
N Julien, E Ferrary, A Sokoloff, G Lamas, O Sterkers, D Bernadeschi
OBJECTIVES: The aim of the study was to stimulate the vagal and the recurrent laryngeal nerves during and after thyroidectomy or parathyroidectomy, to record muscle responses, interpret the electrophysiological modifications and identify prognostic factors for postoperative vocal fold mobility. PATIENTS AND METHODS: A prospective study monitored 151 vagal nerves and 144 recurrent laryngeal nerves in 114 patients. Seven patients (14 vagal nerves) underwent continuous monitoring via an automatic periodic stimulation (APS(®)) electrode...
December 26, 2016: European Annals of Otorhinolaryngology, Head and Neck Diseases
https://www.readbyqxmd.com/read/28017461/comparing-chalk-with-cheese-the-egg-contact-quotient-is-only-a-limited-surrogate-of-the-closed-quotient
#12
Christian T Herbst, Harm K Schutte, Daniel L Bowling, Jan G Svec
The electroglottographic (EGG) contact quotient (CQegg), an estimate of the relative duration of vocal fold contact per vibratory cycle, is the most commonly used quantitative analysis parameter in EGG. The purpose of this study is to quantify the CQegg's relation to the closed quotient, a measure more directly related to glottal width changes during vocal fold vibration and the respective sound generation events. Thirteen singers (six females) phonated in four extreme phonation types while independently varying the degree of breathiness and vocal register...
December 22, 2016: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28017460/vocal-tract-adjustments-of-dysphonic-and-non-dysphonic-women-pre-and-post-flexible-resonance-tube-in-water-exercise-a-quantitative-mri-study
#13
Rosiane Yamasaki, Emi Z Murano, Eloisa Gebrim, Adriana Hachiya, Arlindo Montagnoli, Mara Behlau, Domingos Tsuji
OBJECTIVE: To compare vocal tract (VT) adjustments of dysphonic and non-dysphonic women before and after flexible resonance tube in water exercise (FRTWE) at rest and during phonation using magnetic resonance imaging. STUDY DESIGN: Prospective study. METHODS: Twenty women, aged 20-40 years, 10 dysphonic with vocal nodules (VNG) and 10 controls (CG), underwent four sets of sagittal VT MRI: two pre-FRTWE, at rest and during phonation, and two post-FRTWE, during phonation and at rest...
December 22, 2016: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28007508/functional-assessment-of-glottal-insufficiency-treated-by-hyaluronic-acid-injection-retrospective-20-case-series
#14
C Dorbeau, F Marmouset, E Lescanne, D Bakhos, S Morinière
OBJECTIVES: The objectives of the present study were to describe hyaluronic acid injection to the vocal folds as treatment for glottal insufficiency, assess indications and report vocal results at 1 month and later than 6 months postoperatively. PATIENTS AND METHODS: A single-center retrospective study was performed for the period March 2012 to August 2015. Inclusion criteria comprised: unilateral recurrent nerve palsy or vocal fold closure defect with conserved mobility...
December 19, 2016: European Annals of Otorhinolaryngology, Head and Neck Diseases
https://www.readbyqxmd.com/read/28007326/unilateral-vocal-fold-paralysis-a-systematic-review-of-speech-language-pathology-management
#15
REVIEW
Chloe Walton, Erin Conway, Helen Blackshaw, Paul Carding
OBJECTIVES: Dysphonia due to unilateral vocal fold paralysis (UVFP) can be characterized by hoarseness and weakness, resulting in a significant impact on patients' activity and participation. Voice therapy provided by a speech-language pathologist is designed to maximize vocal function and improve quality of life. The purpose of this paper is to systematically review literature surrounding the effectiveness of speech-language pathology intervention for the management of UVFP in adults...
December 19, 2016: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28006054/cognitive-load-in-voice-therapy-carry-over-exercises
#16
Jenny Iwarsson, David Jackson Morris, Laura Winther Balling
Purpose: The cognitive load generated by online speech production may vary with the nature of the speech task. This article examines 3 speech tasks used in voice therapy carry-over exercises, in which a patient is required to adopt and automatize new voice behaviors, ultimately in daily spontaneous communication. Method: Twelve subjects produced speech in 3 conditions: rote speech (weekdays), sentences in a set form, and semispontaneous speech. Subjects simultaneously performed a secondary visual discrimination task for which response times were measured...
January 1, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28004225/modeling-viscous-dissipation-during-vocal-fold-contact-the-influence-of-tissue-viscosity-and-thickness-with-implications-for-hydration
#17
Byron D Erath, Matías Zañartu, Sean D Peterson
The mechanics of vocal fold contact during phonation is known to play a crucial role in both normal and pathological speech production, though the underlying physics is not well understood. Herein, a viscoelastic model of the stresses during vocal fold contact is developed. This model assumes the cover to be a poroelastic structure wherein interstitial fluid translocates in response to mechanical squeezing. The maximum interstitial fluid pressure is found to generally increase with decreasing viscous dissipation and/or decreasing tissue elasticity...
December 21, 2016: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28003099/long-term-results-of-18-fat-injections-in-unilateral-vocal-fold-paralysis
#18
R Pagano, D Morsomme, S Camby, L Lejeune, C Finck
OBJECTIVE: The purposes of this study were to assess the long-term efficacy of medialization laryngoplasty via injection of autologous fat in patients with unilateral laryngeal paralysis, and to discuss the results based on the volume of fat injected and the size of the initial glottic gap. STUDY DESIGN: This was a retrospective study with clinical reevaluation of 18 patients treated for unilateral laryngeal paralysis at Liège University Hospital between April 1, 2011, and December 1, 2014...
December 19, 2016: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/27996099/preliminary-study-of-a-novel-transfection-modality-for-in-vivo-sirna-delivery-to-vocal-fold-fibroblasts
#19
Iv Kraja, Renjie Bing, Nao Hiwatashi, Bernard Rousseau, Danielle Nalband, Kent Kirshenbaum, Ryan C Branski
OBJECTIVE: An obstacle to clinical use of RNA-based gene suppression is instability and inefficiency of current delivery modalities. Nanoparticle delivery likely holds great promise, but the kinetics and transfection conditions must be optimized prior to in vivo utility. We investigated a RNA nanoparticle complex incorporating a lipitoid transfection reagent in comparison to a commercially available reagent. STUDY DESIGN: In vitro. METHODS: We investigated which variables influence transfection efficiency of lipitoid oligomers and a commercially available reagent across species, in vitro...
December 20, 2016: Laryngoscope
https://www.readbyqxmd.com/read/27993501/are-instructions-to-manipulate-specific-parameters-of-laryngeal-function-associated-with-auditory-perceptual-ratings-of-voice-quality-in-nondisordered-speakers
#20
Catherine J Madill, Christine Sheard, Robert Heard
OBJECTIVES/HYPOTHESIS: This preliminary study investigated whether auditory-perceptual judgments of voice quality by experienced speech language pathologists were associated with instructions given to speakers to manipulate specific laryngeal postures. STUDY DESIGN: Experimental, within-subject design. METHODS: Nine speakers were instructed and trained to manipulate three vocal parameters implicated in functional voice disorders-false vocal fold constriction, vocal fold mass, and larynx height-while reading a standard passage...
December 16, 2016: Journal of Voice: Official Journal of the Voice Foundation
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