In Vitro Mechanical Testing of Braided Polyurethane Elastic Fiber and Braided Polyester for Equine Laryngoplasty

作者：Willsallen Hadley^*; Heller Jane; Kark Lauren; Hilbert Bryan J

来源：Veterinary Surgery, 2015, 44(2): 223-230.

DOI：10.1111/j.1532-950X.2014.12184.x

ObjectivesIn vitro comparison of the mechanical properties of braided polyurethane elastomer (Lycra (R)) and braided polyester (Ethibond) (1) when inserted into the muscular process of the arytenoid cartilage and (2) as suture loops.
Study DesignExperimental.
AnimalsEquine cadaver larynges (n=15).
MethodsThe muscular processes (n=30) of the arytenoid cartilages were dissected from each larynx and embedded in a resin base. Lycra (R) and Ethibond prostheses were randomly allocated to the left or right muscular process and each underwent cyclic fatigue (25-50N) followed by load-to-failure testing. Isolated suture loops of Lycra (R) (n=25) and Ethibond (n=25) also underwent the same cyclic fatigue followed by load-to-failure testing (n=20) or a creep testing protocol (25N for 10min; n=5).
ResultsLycra (R) prostheses pulled through the cartilage in a significantly greater proportion of cyclic tests (P=.015) and at lower mean (SD) loads, (95.9 +/- 23.4N) during load-to-failure testing than Ethibond prostheses (155.2 +/- 24.4N; P=.0041). Lycra (R) had a significantly greater displacement with and without a cartilage interface when compared to Ethibond (P<.001, P<.002). The Lycra (R) isolated suture loops failed at significantly greater loads (233.0 +/- 38.7N) during load-to-failure testing than Ethibond loops (201.6 +/- 47.4N; P=.042).
ConclusionsLycra (R) prostheses embedded in laryngeal cartilage pulled through the cartilage at lower loads than Ethibond prostheses. Lycra (R) suture loops were stronger than Ethibond suture loops. Lycra (R) had greater displacement than Ethibond in all tests as suture loops or when embedded in cartilage.

• 出版日期2015-2