Abstract
Objective: To assess the role of stroboscopy in the diagnosis of vocal cord lesions. Study Design: Prospective interventional study. Setting: Academic tertiary care medical centre. Materials and Methods: 50 patients with complaints of hoarseness of voice were clinically evaluated and diagnosis was made using Rigid Videolaryngoscopy, Flexible Videolaryngoscopy and Videostroboscopy. Patients underwent microlaryngeal surgery and a final diagnosis made with histopathological examination. The intra-operative findings and the final histopathological diagnosis were compared with the diagnosis made with rigid, flexible videolaryngoscopy and stroboscopy. Results: Intra-operative findings correlated with stroboscopic findings in 84% of patients, with fibreopticlaryngo-pharyngoscopic diagnosis in 54% of patients and with rigid video-laryngoscopy in 46% of patients. Videostroboscopy showed the highest diagnostic co-relation on histopathology (80%) as compared to rigid videoendoscopy (56%) and flexible videolaryngoscopy (58%). Videostroboscopy also elucidated vocal fold abnormalities that were missed on rigid or flexible laryngoscopic examinations. Conclusion: Videostroboscopy is a valuable complement to a thorough vocal history and physical examination. Videostroboscopy is superior to constant light laryngeal examination in diagnosis of vocal cord lesions.
Highlights
A total of 50 patients with vocal cord lesions were evaluated and a clinical diagnosis was arrived at using rigid videolaryngoscopy (70 ̊), flexible video-laryngoscopy and videostroboscopy
The intra operative findings together with the final histopathological diagnosis were co-related with the clinical diagnosis made using rigid, flexible videolaryngoscopy and videostroboscopy through a simple percentage analysis
Video-stroboscopy can elucidate vocal fold abnormalities missed during rigid videolaryngoscopy or during fibre-optic laryngo-pharyngoscopic examinations
Summary
Even a slight variation in the anatomy of the vocal chords can change the quality of voice, which commonly presents itself as “hoarseness of voice”. The evaluation of vocal fold vibration requires special imaging technology in order to “slow down” vibration for assessment. The most widely used technique for assessing the vibratory characteristics of the vocal folds is known as Videostroboscopy, which has turned into an accepted and essential component of the comprehensive evaluation of voice disorders. Stroboscopy plays a key role in the diagnosis of vocal cord pathology. Stroboscopic imaging of the vocal fold vibratory function during phonation continues to play a central role in diagnostic, therapeutic and surgical decisions during the management and treatment of voice disorders [2]
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