Utility of Laryngeal High-speed Videoendoscopy in Clinical Voice Assessment.
Stephanie R C Zacharias, Dimitar D Deliyski, Terri Treman Gerlach
PMID 28596101WHAT IT FOUND
Adding high-speed videoendoscopy changed vocal fold vibration ratings, most often mucosal wave (74%) and amplitude of vibration (53%), and changed the initial diagnosis in 11 patients (7%), mostly in moderate to severe dysphonia.
Key findings
01Ratings changed most for mucosal wave (74%) and amplitude of vibration (53%).
02The initial diagnosis changed in 11 patients (7%) after high-speed videoendoscopy was added.
03Diagnostic changes were concentrated in vocal fold lesions (73%) and in patients with moderate or severe dysphonia (83%).
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The design was comparative and not controlled, so clinicians' choices could have affected which patients received high-speed videoendoscopy. Patients with mild dysphonia may not have received the full protocol, so the sample may over-represent moderate and severe voice disorders. Inter-rater and intra-rater reliability were not assessed, so the consistency of the ratings is unknown. The study reports changes in clinical ratings and initial diagnoses, not whether those changes led to better treatment decisions or voice outcomes. Findings come from one voice center with trained clinicians and a custom high-speed system, so they may not generalize to other clinics.
The easy way to misread this
Do not read the 7% diagnosis change as proof that high-speed videoendoscopy improves voice outcomes. The study reports changes in ratings and initial diagnoses, not treatment success.