[The videostrobokymography in phoniatric practice]

Abstract

Introduction: Thanks to videostrobokymography the vocal fold vibration from particular area of glottal chink, can be assessed in an objective way.

Aim: Evaluation of objective parameters of vocal fold vibration with the usage of videostrobokymography in patients with different voice disorders.

Material and methods: Material of the study included patients treated in the Institute of Physiology and Pathology of Hearing, Audiology and Phoniatrics Clinic. 82 patients with normal voices, vocal fold nodules, polyps, Reinke edema, vocal cord paralysis and functional dysphonia were enrolled into the study. Open Quotient (OQ) from frontal, middle and dorsal third of vocal folds were measured. T-Student test was used for statistical analysis.

Results: The study revealed differences of OQ in control group and patients with organic or functional dysphonia. Differences in parameters were calculated for each vocal fold region. The mean value of OQ in control group was 0.56 (frontal third), 0.55 (middle third), 0.597 (dorsal third). Statistical significant differences of OQ calculated from separate glottal chink areas, were observed in Reinke edema (from frontal and middle third) and vocal cord paralysis (from frontal third).

Conclusions: Videostrobokymography is an useful complement to classical stroboscopy. Objective parameters enables the objectification of vibratory activities. Videostrobokymography is helpful in differential diagnosis of voice disorders.