Quantitative Analysis of Vocal Fold Vibration using High-Speed Videoendoscopy in Children with and without Bilateral Lesions.
Stephanie R C Zacharias, Alessandro de Alarcon, Dimitar D Deliyski
PMID 32712076WHAT IT FOUND
On high-speed videoendoscopy, children with bilateral vocal fold lesions showed non-linear vocal fold vibration patterns, especially anterior to the lesion.
Healthy children showed more linear patterns, with posterior and mid-fold movements often similar between groups.
Key findings
01Children with bilateral vocal fold lesions showed non-linear phase patterns along the vocal folds, while healthy children showed more linear patterns.
02Group differences were most apparent at the anterior aspect of the vocal folds, while posterior and mid-membranous patterns were similar.
03All seven vocally healthy children showed a zipper-like anterior-to-posterior contact pattern over the entire vocal fold length, while children with lesions showed more variable patterns.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study recruited a small number of children, and the contact-pattern result was based on only seven healthy children. Five children were excluded because they had a heightened gag reflex, so the analysed group may not represent children who cannot tolerate the scope. The paper states 16 children with lesions were recruited and 4 were excluded, but it does not state how many lesion-group children were analysed. The healthy children were recruited from siblings and word of mouth, not from a general population sample. The lesion group included different lesion types, sizes and shapes, but the paper does not separate results by those features. The paper reports vibration patterns in children with and without lesions, not treatment outcomes.
The easy way to misread this
Do not read these patterns as a validated diagnostic test or as proof that a treatment will improve voice. The study describes a small group of children and does not compare treatment outcomes.