No abstract available.
Electric Stimulation* ; Vocal Cords*

No abstract available.
Cicatrix* ; Vocal Cords*

Glottic hemangioma is a benign vascular tumor that is rarely seen in the adult population. We report a rare Filipino case of glottic hemangioma in a 65-year-old female presenting with 2 weeks history of hoarseness and a smooth, pedunculated, bluish mass at the anterior one-third of the right vocal cord in flexible laryngoscopy. Direct suspension laryngoscopy showed a pedunculated mass that was paler-looking, similar to the color of the surrounding mucosa, exhibiting the Phonation sign of Menzel. The patient underwent microlaryngeal excision and histopathology showed findings consistent with cavernous hemangioma.
Vocal Cords ; Hemangioma ; Adult

Humans ; Microscopy ; Vocal Cords

No abstract available.
Acoustics* ; Vocal Cord Paralysis* ; Vocal Cords*

No abstract available.
Granuloma* ; Humans ; Ventilation* ; Vocal Cords*

No abstract available.
Anesthesia, General* ; Ulcer* ; Vocal Cords*

Regeneration ; Tissue Engineering ; Vocal Cords

A computational study of the pulsating jet in a squared channel with a dynamic glottal-shaped constriction is presented. It follows the model experiments of Triep and Brücker (J Acoust Soc Am 127(2):1537–1547, 2010) with the cam-driven model that replicates the dynamic glottal motion in the process of human phonation. The boundary conditions are mapped from the model experiment onto the computational model and the three dimensional time resolved velocity and pressure fields are numerically calculated. This study aims to provide more details of flow separation and pressure distribution in the glottal gap and in the supraglottal flow field. Within the glottal gap a ‘vena contracta’ effect is generated in the mid-sagittal plane. The flow separation in the mid-coronal plane is therefore delayed to larger diffuser angles which leads to an ‘axisswitching’ effect from mid-sagittal to mid-coronal plane. The location of flow separation in mid-sagittal cross section moves up- and downwards along the vocal folds surface in streamwise direction. The generated jet shear layer forms a chain of coherent vortex structures within each glottal cycle. These vortices cause characteristic velocity and pressure fluctuations in the supraglottal region, that are in the range of 10–30 times of the fundamental frequency.
Constriction* ; Humans ; Phonation ; Vocal Cords

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.
Humans ; Vibration ; Vocal Cords ; Voice