A Study of the Availability and Parameters of Videokymography / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES: Examining vibrations of the vocal fold is very important in patients with voice changes. The newly developed videokymography (VKG) takes images in real time and records irregular vibrations of the vocal fold. However, there are few data on VKG findings. We studied VKG to evaluate the vibratory characteristics of the vocal fold in benign vocal fold lesions and normal subjects. MATERIALS AND METHODS: Normal subjects (N=20) and patients (N=100) with laryngeal lesions were evaluated. Unique vibratory patterns, blurred demarcation of the mucosal propagation, decreased margin amplitudes, asymmetry in phase or amplitude, and different contact sites were observed in each benign vocal-fold lesion. RESULTS: There were several differences between subjects with normal and with laryngeal lesion. VKG depicted the tiny difference which were not exactly found by the stroboscope. CONCLUSIONS: We found that each type of laryngeal lesion has specific characteristics which can be revealed by VKG examination. These characteristics could be quantified and used to objectively evaluate VKG findings. This research shows that VKG can be used as a supplementary diagnostic tool.

The Study of Bilateral Venign Vocal Fold Lesions / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES: Benign vocal fold lesions are a common cause of voice dysfunction. Successful treatment of these diseases is primarily accomplished through voice therapy and surgical treatment. But many clinicians are faced with cases where problems persist in spite of treatment. The one cause of treatment failure in benign vocal fold lesions may be the bilateral lesions each vocal fold has different lesion. Authors studied to evaluate the possibility of persisted voice dysfunction in bilateral benign vocal fold lesions. MATERIALS AND METHODS: Strobovideolaryngoscopy findings of 128 patients with bilateral benign vocal fold lesions were reviewed. We evaluate to see if lesions in each vocal fold of one patient were the same or not. The treatment methods for each lesion were classified. We compare the treatment methods for each lesion with those already performed on the patients. RESULTS: In cases with nodule in one vocal fold, we observed 8 edema, 2 epidermoid cyst in the opposite vocal fold. In cases with reinke's edema on both vocal fold, we observed combined lesion, such as 1 epidermoid cyst, 1 hyperkeratosis. In cases with sulcus vocalis on both vocal fold, we observed combined lesion, such as 3 nodules, 4 polyps, 6 edema. We observed 2 cases with epidermoid cyst in one side and edema in opposite vocal fold, 5 cases with bilateral vocal nodule and combined varices in one side, 2 cases with bilateral laryngeal edema and combined hyperkeratosis in one side. CONCLUSION: Bilateral benign vocal fold lesions sometimes have more than 2 laryngeal diseases for which the treatment modality is different. Clinician should know the lesion precisely in each vocal fold, and treatment plan should be also made in according to the lesion in each vocal fold.