Patients with unilateral vocal fold paralysis (VFP) often have speech difficulties which cannot be thoroughly assessed by established voice evaluation methods, including subjective voice assessment, perceptual voice assessment, and aerodynamic and acoustic measures. Therefore, clinical voice evaluation incorporating speaking tasks and outcome indices is needed. This study aimed to examine differences in the speaking voice evaluation indices (breath frequency and single-breath speech length) before and after surgical interventions in these patients, and analyze the relationships with speaking voice evaluation and aerodynamic measures, including maximum phonation time (MPT) and mean flow rate (MFR). Eighteen patients with unilateral VFP (11 men and 7 women, aged 35 to 75 years) were asked to read the passage “North Wind and the Sun” aloud, and aerodynamic assessment of voice production was conducted before and after their surgeries. Acoustic analysis was performed for the first three sentences to obtain the breath frequency, and the mean and maximum single-breath speech length in mora. There were significant differences in all the indices between both evaluations. Breath frequency was less, and the mean and maximum single-breath speech lengths were longer in the post-surgery assessment. There were moderate correlations between breath frequency and aerodynamic measures, and between the mean single-breath speech length and MFR, in the pre-surgery assessment. In contrast, the speaking voice evaluation indices and aerodynamic measures did not show any correlation in the post-surgery assessment. These results suggest that an oral reading task with outcome indices could be useful for speaking voice evaluation for patients with unilateral VFP.
|Translated title of the contribution||Oral reading task with selected indices to evaluate speaking voice function in patients with unilateral vocal fold paralysis before and after surgical interventions|
|Number of pages||9|
|Journal||Japan Journal of Logopedics and Phoniatrics|
|Publication status||Published - 2021|
ASJC Scopus subject areas
- LPN and LVN
- Speech and Hearing