| Abstract | Objective: The chronic inflammation in the laryngeal mucosa of patients with laryngopharyngeal reflux (LPR) causes the laryngeal to be in a high reaction state. This paper discussed the characteristics of vocal fold movement and vibration function of LPR patients by analyzing the laryngeal high-speed endoscopy.
Methods: Forty patients with LPR were enrolled as the LPR group. Forty healthy volunteers were selected as the control group. The subjects underwent laryngeal high-speed endoscopy. The vocal fold movement and vibration parameters were analyzed: vocal fold adduction time, vocal fold abduction time, vocal fold vibration onset mode (voice onset time (VOT) and vocal onset mode) and vocal fold vibration period opening quotient (OQ). SPSS 25.0 was used for statistical analysis.
Results: Vocal fold adduction time in the LPR group was shorter than that of the control group (P<0.05). The VOT in the LPR group was longer than that of the control group (P<0.05). The number of patients with hard voice onset in the LPR group was higher than that of the control group (P0.05). There was no significant difference in vocal fold abduction time between the LPR group and the control group (P>0.05). The difference of abduction time on both sides of vocal folds in the LPR group was greater than that of the control group (P<0.05).
Conclusions: The vocal fold movement behavior of the LPR patients changed. These indicated that the vocal fold movement of the LPR patients was in an irritable state and would cause the weakening of vocal fold abduction and have a hard vocal onset mode. These would provide a reference for the objective evaluation of vocal fold movement function in the LPR patients
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