Effects of Voice Therapy as Objectively Evaluated by Digitized Laryngeal Stroboscopic Imaging

Objective measurements derived from digitized laryngeal stroboscopic images were used to demonstrate changes in vocal fold vibration and in the size of benign lesions after 3 months of voice therapy. Forty chronically dysphonic patients were studied. By means of a rigid stroboscope, pretreatment and...

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Bibliographic Details
Published in:Annals of otology, rhinology & laryngology rhinology & laryngology, 2002-10, Vol.111 (10), p.902-908
Main Authors: Speyer, Renée, Kempen, Pieter A., Wieneke, George, Kersing, Willem, Hosseini, Elham Ghazi, Dejonckere, Philippe H.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Biological and medical sciences
Ent. Stomatology
Female
Humans
Image Processing, Computer-Assisted
Investigative techniques, diagnostic techniques (general aspects)
Male
Medical sciences
Middle Aged
Non tumoral diseases
Otorhinolaryngology. Stomatology
Pathology. Cytology. Biochemistry. Spectrometry. Miscellaneous investigative techniques
Phonation
Time Factors
Treatment Outcome
Upper respiratory tract, upper alimentary tract, paranasal sinuses, salivary glands: diseases, semeiology
Vocal Cords - physiology
Voice Disorders - therapy
Voice Training
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Summary:Objective measurements derived from digitized laryngeal stroboscopic images were used to demonstrate changes in vocal fold vibration and in the size of benign lesions after 3 months of voice therapy. Forty chronically dysphonic patients were studied. By means of a rigid stroboscope, pretreatment and posttreatment recordings were made of the vocal folds at rest and under stroboscopic light during phonation. From each recording, images of the positions at rest and during vibration at maximal opening and at maximal closure were digitized. The surface areas of any lesions and of the glottal gap were independently measured in the digitized images by 2 experienced laryngologists. Referential distances were determined in order to compensate for discrepancies in magnification in the various recordings. After 3 months of voice therapy, significant improvement in lesion size and degree of maximal closure during vibration could be demonstrated in about 50% of the patients. The degree of maximal opening did not prove to be a significant parameter.
ISSN:0003-4894
1943-572X
DOI:10.1177/000348940211101007