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In vitro evaluation of the effect of a prototype dynamic laryngoplasty system on arytenoid abduction
Author(s) -
Ahern Benjamin J.,
Lim YeeWei,
van Eps Andrew,
Franklin Samantha
Publication year - 2018
Publication title -
veterinary surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 79
eISSN - 1532-950X
pISSN - 0161-3499
DOI - 10.1111/vsu.12933
Subject(s) - medicine , laryngoplasty , arytenoid cartilage , orthodontics , nuclear medicine , surgery , larynx
Objective To determine the effect of a prototype dynamic laryngoplasty system (DLPS) on arytenoid abduction. Study design In vitro experimental. Study population Ten equine larynges. Methods Dissected larynges were mounted, and the right arytenoid was maximally abducted for testing. A left‐sided laryngoplasty (LP) was performed by using a strand of No. 2 FiberWire and a FASTakII anchor. Phase 1 involved tightening the suture, without the DLPS device in place, in 1‐mm increments and acquiring a digital image of the rima glottidis at each increment. Phase 2 involved tying the suture with the DLPS in place at a left to right quotient (LRQ) of 0.7. Digital images were subsequently taken at 3 stages of DLPS activation (0, 25, and 50 or maximal psi) and analysed to calculate LRQ. Results All tests were completed for 9 larynges. In phase 1, a total shortening of 25.89 ± 1.27 mm was possible, which increased the LRQ from 0.59 ± 0.02 to 1.07 ± 0.12. In phase 2, activation of the DLPS increased the LRQ from 0.70 ± 0.05 to 0.97 ± 0.09. This change in LRQ equated to 18.7 mm of shortening on the basis of phase 1 results. The maximum psi of the DLPS achieved was 37.33 ± 5.96. Conclusion The DLPS increased the degree of arytenoid abduction in vitro. This change in LRQ equated to 18.7 mm of shortening of the LP suture based on phase 1 results. Clinical impact These results support further evaluation of the DLPS to determine the effect of changes in DLPS on airway resistance.