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Medicina is published by MDPI from Volume 54 Issue 1 (2018). Articles in this Issue were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence. Articles are hosted by MDPI on mdpi.com as a courtesy and upon agreement with Lithuanian Medical Association, Lithuanian University of Health Sciences, and Vilnius University.
Open AccessArticle

Quantitative microlaryngoscopic measurements of vocal fold polyps, glottal gap and their relation to vocal function

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Department of Otorhinolaryngology
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Department of Physics, Mathematics and Biophysics, Kaunas University of Medicine
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UAB Elinta
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Department of Applied Electronics, Kaunas University of Technology, Lithuania
*
Author to whom correspondence should be addressed.
Medicina 2008, 44(4), 266; https://doi.org/10.3390/medicina44040034
Received: 22 February 2008 / Accepted: 18 April 2008 / Published: 23 April 2008
Objectives. The purpose of this study was to quantify the size of vocal fold polyps and to investigate the relationship between the glottal gap and parameters of acoustic voice analysis and phonetography.
Material and methods.
Eighty-one microlaryngoscopic images and digital recordings of voices (acoustic analysis and phonetogram) acquired from the patients with vocal fold polyps (VFPs) were employed in this study. Vocal fold (VF) images were collected during routine direct microlaryngoscopy using Moller-Wedel Universa 300 surgical microscope, 3-CCD Elmo 768×576- pixel color video camera and a 300 W Xenon light source. Acoustic voice analysis and phonetography were established using Dr. Speech (Tiger Electronics Inc.) software. Microlaryngoscopic images were processed by original software created by ELINTA and displayed on a monitor. The relative lengths and widths of vocal fold polyps as well as percentage area of VFP were calculated. The Pearson’s correlation was applied to reveal the correlation between VFP dimensions and acoustic voice parameters.
Results
. There were no statistically significant differences between the dimensions of left and right vocal folds and VFPs. Statistically significant slight to mild correlations between measured dimensions of VFP acoustic and phonetogram parameters were revealed, with HNR and phonetogram area showing the strongest correlation to the size of VFPs.
Conclusion
. The results of our study confirm that quantitative microlaryngoscopic measurements of vocal fold polyp and glottal gap dimensions may be a useful tool for objective assessment of glottic incompetence and voice impairment.
Keywords: microlaryngoscopic images; vocal fold polyps; acoustic voice parameters; glottal gap microlaryngoscopic images; vocal fold polyps; acoustic voice parameters; glottal gap
MDPI and ACS Style

Uloza, V.; Kašėta, M.; Pribuišienė, R.; Šaferis, V.; Jokūžis, V.; Gelžinis, A.; Bačauskienė, M. Quantitative microlaryngoscopic measurements of vocal fold polyps, glottal gap and their relation to vocal function. Medicina 2008, 44, 266.

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