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ORIGINAL ARTICLE
Commun Sci Disord. 2009;14(2): 212-222.
Breathing Characteristics of Adults with Unilateral Vocal Fold Palsy
최예린`
Copyright ©2009 The Korean Academy of Speech-Language Pathology and Audiology
최예린
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ABSTRACT

Background & Objectives
Patients with unilateral vocal fold palsy (UVFP) suffer from incomplete glottal closure and irregular vocal fold vibration, which interrupts the airflow needed for efficient voice production. This study investigated adult patients with UVFP, compared them to adult controls, and evaluated the differences between the two groups in the characteristics of glottal area waveform and phonation, as well as the relationship between glottal area waveform and respiratory and vocal function.
Methods
Twenty control subjects and 20 adults with UVFP were studied. Respiratory and aerodynamic analysis and glottal area waveform (GAW) studies were performed.
Results
There were no significant differences in respiratory function between the two groups. Subjects with UVFP had significantly shorter maximum phonation times (MPT) and fewer syllables per breath in a reading passage task than did control subjects. The frequency of inspiration, subglottic pressure (Psub), and mean airflow rate (MFR) were significantly higher in patients with UVFP than in control subjects. Multiple regression analysis was employed to examine the relationship between number of syllables per breath and four independent factors: MPT, Psub, MFR, and reading rate. Multiple regression analysis revealed that the number of syllables per breath was significantly influenced by MPT.
Discussion & Conclusion
The results suggest that MPT, number of syllables per breath, and frequency of inspiration may be useful parameters in evaluating respiratory function in patients with UVFP.
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309, Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
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