Relationship among glottal area, static supraglottic compression, and laryngeal function studies in unilateral vocal fold paresis and paralysis

Voice and Laryngeal Configuration of Men With Unilateral Vocal Fold Paralysis Before and After Medialization

“…1,2 The approximation of the vestibular folds and the constriction of the laryngeal vestibule are other laryngeal modifications that are frequently encountered, regardless of the position of the vocal fold. 3,4 In a study, 5 the vestibular compensation was found to be variable among individuals with UVFP. For the authors, 5 some patients may have laryngeal function and voice measurements within normal limits, because of the activity of the false vocal folds, associated with less glottal incompetence; in other individuals, the compensation mechanism may be impaired because of the level of the denervation of the affected vocal fold.…”

“…Researchers [3][4][5] have highlighted the need to describe the configuration of the larynx found at the glottic and supraglottic levels and the voice of patients with UVFP to guide treatment and prevent negative compensatory adjustments. Thus, the purpose of this study is to describe the laryngeal configuration and the voice of adult to elderly male patients with UVFP, before and after vocal fold medialization.…”

Variability of Normal Vocal Fold Dynamics for Different Vocal Loading in One Healthy Subject Investigated by Phonovibrograms

“…[1][2][3][4] Among these techniques, endoscopic imaging allows a direct evaluation of the glottic closure and opening patterns and the dynamic characteristics of the vibrations of the vocal folds. 5,6 The latest imaging technique to study vocal fold dynamics is based on high-speed digital imaging (HSI) technique. HSI systems typically record images of the vocal folds during phonation of sustained vowel sounds, at an acquisition rate of 2000-4000 frames/s, being fast enough to resolve the actual phonatory vibrations of the vocal folds.…”

Evidence of Return of Function in Patients with Vocal Fold Paresis

“…14 For the most part, studies that have examined treatment outcomes have compared preand posttreatment measures in individuals without regard to the amount of time after onset, and a variety of treatments have been reported to be beneficial. 10,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] However, rather than assessing whether a significant difference can be demonstrated for a particular outcome measure before and after intervention, another approach would be to assess whether an actual return of function within normal limits has occurred, or is it simply an improvement in function. Differences between treatments can be studied using this approach.…”

“…Two variables that have commonly been used to measure improvement pre-and posttreatment are maximum phonation time (MPT) and midvowel translaryngeal flow. 10,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] Thus, these three measures represent those from the studies of both spontaneous recovery and treatment. Studying the time line of return to normal function is difficult to achieve retrospectively unless data are collected on every subject at the same points in time.…”