Katherine A Kendall1. 1. Division of Otolaryngology, Minneapolis Veterans Affairs Medical Center, University of Minnesota, 1 Veterans Dr, Minneapolis, MN 55417, USA. katherine.kendall@va.gov
Abstract
OBJECTIVE: To describe normal vocal fold vibratory characteristics recorded with high-speed digital imaging (HSV) of the larynx. DESIGN: Prospective study of healthy subjects who volunteered to undergo laryngeal HSV and videostroboscopy. Image analysis was randomly assigned to 3 blinded raters. SETTING:Community-based clinic with a specialty in laryngology. PARTICIPANTS: Fifty healthy subjects aged 21 to 65 years who were nonsmokers and who had no voice problems, laryngopharyngeal reflux, or reactive airway disease. MAIN OUTCOME MEASURES: The following characteristics of vibration were described: glottal configuration, phase closure, vibratory symmetry, mucosal wave propagation, amplitude of vibration, and periodicity of vibration. Interrater and intrarater reliabilities were calculated for both imaging modalities. RESULTS: The range of findings for each measure is described. The comparison of videostroboscopy ratings with ratings from HSV studies did not reveal any significant difference between the 2 modalities for any of the measures except for the assessment of periodicity. Aperiodic vibratory characteristics were noted on 30% of the videostroboscopy studies (n = 15) and in only 4% of the HSV studies (n = 2) (P <. 001). Although interrater and intrarater agreement were considered to be generally acceptable, a significant rater effect was identified. CONCLUSION: This preliminary study describes a range of normal values for vocal fold vibratory characteristics as recorded with laryngeal HSV, providing a basis for comparison of studies in patients with voice problems.
RCT Entities:
OBJECTIVE: To describe normal vocal fold vibratory characteristics recorded with high-speed digital imaging (HSV) of the larynx. DESIGN: Prospective study of healthy subjects who volunteered to undergo laryngeal HSV and videostroboscopy. Image analysis was randomly assigned to 3 blinded raters. SETTING: Community-based clinic with a specialty in laryngology. PARTICIPANTS: Fifty healthy subjects aged 21 to 65 years who were nonsmokers and who had no voice problems, laryngopharyngeal reflux, or reactive airway disease. MAIN OUTCOME MEASURES: The following characteristics of vibration were described: glottal configuration, phase closure, vibratory symmetry, mucosal wave propagation, amplitude of vibration, and periodicity of vibration. Interrater and intrarater reliabilities were calculated for both imaging modalities. RESULTS: The range of findings for each measure is described. The comparison of videostroboscopy ratings with ratings from HSV studies did not reveal any significant difference between the 2 modalities for any of the measures except for the assessment of periodicity. Aperiodic vibratory characteristics were noted on 30% of the videostroboscopy studies (n = 15) and in only 4% of the HSV studies (n = 2) (P <. 001). Although interrater and intrarater agreement were considered to be generally acceptable, a significant rater effect was identified. CONCLUSION: This preliminary study describes a range of normal values for vocal fold vibratory characteristics as recorded with laryngeal HSV, providing a basis for comparison of studies in patients with voice problems.
Authors: Christopher R Krausert; Aleksandra E Olszewski; Lindsay N Taylor; James S McMurray; Seth H Dailey; Jack J Jiang Journal: J Voice Date: 2010-05-15 Impact factor: 2.009
Authors: Dinesh K Chhetri; Juergen Neubauer; Jennifer L Bergeron; Elazar Sofer; Kevin A Peng; Nausheen Jamal Journal: Laryngoscope Date: 2013-08-05 Impact factor: 3.325