Abstract
IntroductionElectroglottography (EGG) is the most commonly used method of indirect visual examination of vocal fold vibration.AimThe study was conducted with an aim of assessing EGG quasi open quotient (QOQEGG) in different functional dysphonias to develop a differential diagnosis. The second aim was to check the influence of articulation on QOQEGG values.Material and methodsThere were 20 people without voice problems, 20 patients with hypofunctional dysphonia and 20 patients with hyperfunctional dysphonia included in the study. Electroglottography was recorded during comfortable sustained phonation of [a], [e], [i], [o], [u].ResultsThere were no statistically significant differences in QOQEGG observed during phonation of different vowels in the control group and patients with hyperfunctional dysphonia. In patients with hypofunctional dysphonia, significantly higher values of QOQEGG were observed during [a] and [e]. Both in the control and in studied groups vowel [i] was vocalized significantly quieter.ConclusionsTo conclude, EGG can be useful in differential diagnosis of functional dysphonia. QOQEGG is a parameter differentiating hypofunctional dysphonia from hyperfunctional dysphonia. Dissimilarities in articulation of different vowels in patients with various types of dysphonia influence values of QOQEGG. EGG study protocol in cases of functional dysphonia should include a comparison of [a], [e], [i] vowels.
Highlights
Electroglottography (EGG) is the most commonly used method of indirect visual examination of vocal fold vibration
There was no relationship between the values of QOQEGG and the value of the intensity of sound generated by the subjects during comfortable phonation
Through analysis of the Q OQEGG in various types of functional dysphonias we aimed to develop a successful differential diagnosis
Summary
Electroglottography (EGG) is the most commonly used method of indirect visual examination of vocal fold vibration. Aim The study was conducted with an aim of assessing EGG quasi open quotient (QOQEGG) in different functional dysphonias to develop a differential diagnosis. Results There were no statistically significant differences in Q OQEGG observed during phonation of different vowels in the control group and patients with hyperfunctional dysphonia. In patients with hypofunctional dysphonia, significantly higher values of Q OQEGG were observed during [a] and [e]. Both in the control and in studied groups vowel [i] was vocalized significantly quieter. Dissimilarities in articulation of different vowels in patients with various types of dysphonia influence values of Q OQEGG. EGG study protocol in cases of functional dysphonia should include a comparison of [a], [e], [i] vowels.
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