Frame by Frame Analysis of Glottic Insufficiency Using Laryngovideostroboscopy

Glottic insufficiency (GI) can be either grossly obvious or subtle in its presentation. Subtle GI is demonstrated by various Laryngovideostroboscopic (LVS) clues, including complete but “short” phase closure of the true vocal folds (VFs) during the glottic cycle. We used the frame by frame analysis...

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Vydané v:	Journal of voice Ročník 26; číslo 2; s. 220 - 225
Hlavní autori:	Carroll, Thomas L., Wu, Yi-Hsuan E., McRay, Marissa, Gherson, Shirley
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	United States Mosby, Inc 01.03.2012 Elsevier Science Ltd
Predmet:	Adult Aged Aged, 80 and over Analysis Closure Diagnosis Dysphonia Electromyography Female Frame analysis Frame by frame analysis Glottal insufficiency Glottic insufficiency Glottis - physiopathology Humans Laryngeal electromyography Laryngeal EMG Laryngology Laryngoscopy Laryngovideostroboscopy Larynx Male Medical diagnosis Middle Aged Muscle tension dysphonia Otolaryngology Patients Physiology Primary muscle tension dysphonia Secondary muscle tension dysphonia Speech Pathology Stroboscopy Videostroboscopy Vocal cord atrophy Vocal cord injection Vocal cord paresis Vocal fold atrophy Vocal fold injection Vocal fold paresis Vocal Folds Voice Voice Disorders Voice Disorders - diagnosis Voice Disorders - physiopathology Volunteers Vocal fold atrophy Stroboscopy Laryngovideostroboscopy Vocal fold injection Videostroboscopy Vocal cord paresis Vocal fold paresis Laryngology Muscle tension dysphonia Glottic insufficiency Secondary muscle tension dysphonia Frame by frame analysis Vocal cord atrophy Glottal insufficiency Vocal cord injection Primary muscle tension dysphonia Laryngeal EMG Voice Laryngeal electromyography
ISSN:	0892-1997, 1873-4588, 1873-4588
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Shrnutí:	Glottic insufficiency (GI) can be either grossly obvious or subtle in its presentation. Subtle GI is demonstrated by various Laryngovideostroboscopic (LVS) clues, including complete but “short” phase closure of the true vocal folds (VFs) during the glottic cycle. We used the frame by frame analysis (FBFA) technique to evaluate its effectiveness in objectively contributing to the diagnosis of subtle GI in patients with atrophic and/or paretic VFs. This article intends to formally present the methods and intentions of the FBFA technique and report our findings using FBFA on subjects with clinically diagnosed GI and normal volunteers. Retrospective review and demonstration of technique. Forty-four subjects with a prior clinical diagnosis of true VF atrophy (25/44) and/or paresis (19/44) and five normal volunteers were identified. Using the FBFA technique, each subject’s average percentage of closed frames per glottic cycle was recorded. Subjects with atrophy spent 32.4% of the frames of the glottic cycle in the closed phase, subjects with paresis spent 35.7% of the frames closed, and normal subjects spent 50.2% of the frames closed. FBFA appears to be a simple objective method for the novice or experienced LVS interpreter, by which one can suspect subtle GI. Because of the inherent physical properties by which LVS gives an “illusionary” representation of the glottic cycle, the FBFA technique remains a theoretical tool. Future studies using high-speed digital imaging are needed to validate this useful technique.
Bibliografia:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 ObjectType-Article-1 ObjectType-Feature-2 content type line 23
ISSN:	0892-1997 1873-4588 1873-4588
DOI:	10.1016/j.jvoice.2011.01.008