Impairment of Voice Quality in Paradoxical Vocal Fold Motion Dysfunction
Accepted 19 May 2009. published online 25 January 2010. Corrected Proof
Summary
Objectives/Hypothesis
To compare subjective and objective voice-quality parameters between asymptomatic paradoxical vocal fold motion dysfunction (PVFMD) patients and healthy individuals.
Study Design
Prospective.
Methods
A total number of 12 patients with PVFMD and 12 healthy control subjects had voice evaluations by means of laryngostroboscopy, acoustic analysis (jitter, shimmer, and harmonics-to-noise ratio [HNR]), aerodynamic measurements (maximum phonation time [MPT], s/z ratio), and perceptual analysis (Grade, Roughness, Breathiness, Asthenicity, and Strain Scale [GRBAS] and Voice Handicap Index-10 [VHI-10] scales). Evaluations were conducted when all the patients were asymptomatic.
Results
False vocal cord adduction, anteroposterior constriction of the supraglottic larynx, decreased amplitude, and decreased mucosal wave were observed in the great majority of the PVFMD patients during laryngostroboscopy. Mean jitter and shimmer rates were significantly high in PVFMD patients and there was no significant difference in mean HNR between groups (P<0.05). Mean MPT was significantly long in control subjects (P<0.05) and mean s/z ratio was nearly equal between patients and control subjects. There was a statistically significant difference between groups about GRBAS and VHI-10 scales (P<0.05).
Conclusions
Based on the subjective and objective voice parameters, voice quality is significantly impaired in asymptomatic PVFMD patients when compared with the healthy control subjects.
∗Department of Otolaryngology, Gaziomanpasa University, Tokat, Turkey
†Department of Otolaryngology, Namik Kemal University, Tekirdag, Turkey
Address correspondence and reprint requests to Kursat Yelken, Department of Otolaryngology, Gaziomanpasa University, Kumbet mah. Sezgin Apt. No:10/3, Tokat, Turkey.
ABSTRACT
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