Effects of Bilateral Arytenoid Cartilage Stenting on Canine Laryngeal Resistance Ex Vivo

• Published in: Veterinary surgery 2011, Vol.40 (1), p.97-101
• Main Authors: Cabano, Nicholas R, Greenberg, Marc J, Bureau, Stephane, Monnet, Eric
• Format: Article
• Language: English
• Subjects: Animals; Arytenoid Cartilage - surgery; Cadaver; Cartilage; Dog Diseases - surgery; Dogs; Larynx; Stents; Stents - veterinary; Surgical outcomes; Veterinary medicine; Vocal Cord Paralysis - surgery; Vocal Cord Paralysis - veterinary
• ISSN: 0161-3499; 1532-950X
• DOI: 10.1111/j.1532-950X.2010.00753.x

Objective: To evaluate the effect of Nitinol stents for bilateral arytenoid lateralization on canine laryngeal resistance. Study Design: Ex vivo experimental study. Animals: Canine cadaver larynges (n=7). Methods: Laryngeal resistance was calculated in all specimens with the epiglottis in open and closed positions. Bilateral arytenoid stenting was performed, rima glottidis width measured, and laryngeal resistance calculated. The effects of stenting on laryngeal resistance were evaluated by repeated measures ANOVA. Results: Calculated laryngeal resistance in the 3 stented groups, 2 cm (0.034±0.059 cmH₂O/L/s), 3 cm (0.034±0.059 cmH₂O/L/s), and 4 cm (0.034±0.059 cm H₂O/L/s), was significantly decreased versus the control (unstented) group (0.947±0.624 cmH₂O/L/s; P=.0098) with an epiglottis in the normal position. Calculated laryngeal resistance in the 3 stented groups, 2 cm (43.407±17.348 cm H₂O/L/s), 3 cm (70.659±34.705 cmH₂O/L/s), and 4 cm (92.637±44.509 cm H₂O/L/s), was significantly increased versus the control (unstented) group (29.561±14.499 cm H₂O/L/s) (P=.0185) with an epiglottis in the closed position. The width of the rima glottidis correlated with the size of the stent (r=0.95, P