Comparison between rigid telescopic and flexible fiberoptic laryngostroboscopy

Area of Science:

• Otolaryngology
• Neurology
• Speech-Language Pathology

Background:

• Parkinson's Disease (PD) often causes significant laryngeal abnormalities.
• Stroboscopy is a key diagnostic tool for evaluating these vocal fold dysfunctions.

Purpose of the Study:

• To compare the stroboscopic findings of laryngeal abnormalities in Parkinson's Disease patients using rigid telescopy versus flexible fiberoptic examination.
• To assess the advantages and limitations of each stroboscopic method in this patient population.

Main Methods:

• A prospective study evaluated 36 Parkinson's Disease patients (HY-Degree of Disability Scale > 1.5).
• Data from rigid telescopy and fiberoptic examination were analyzed by three observers using a standardized protocol.
• Patient age range was 41-78 years, with 22 men and 14 women.

Main Results:

• Common findings included tremor, incomplete glottic closure, and vocal fold bowing.
• Fiberoptic examination was not possible in 3 patients due to a strong gag reflex.
• Rigid telescopy was not feasible in 4 patients with aperiodic voice.
• Both methods evaluated parameters like vibratory behavior, mucosal wave, and phase symmetry.

Conclusions:

• Videolaryngostroboscopy is feasible using both rigid and fiberoptic examination methods in Parkinson's Disease patients.
• Each method has specific advantages and limitations that may influence examination success.