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In Vitro Mechanical Testing of an Alternate Laryngoplasty System( ALPS ) for Horses
Author(s) -
Ahern Benjamin J.,
Boston Raymond C.,
Parente Eric J.
Publication year - 2012
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/j.1532-950x.2012.01061.x
Subject(s) - laryngoplasty , medicine , cadaveric spasm , biomechanics , orthodontics , surgery , larynx , anatomy
Objective Mechanical evaluation of a novel alternate laryngoplasty system ( ALPS ). Study Design Experimental. Animal Population Cadaveric horse larynges (n = 10). Methods Arytenoid and cricoid cartilages were embedded for testing. A novel laryngoplasty system consisting of a metallic anchor, 2 stands of #2 suture material, and a metallic button were evaluated. A traditional laryngoplasty using a single strand of #5 E thibond was evaluated in parallel. Constructs were evaluated in cyclic testing oscillating from 30 to 50 N for 3600 cycles. Constructs subsequently underwent a single cycle to failure. Distraction during cyclic testing was recorded. Load at failure and stiffness were calculated from single‐cycle failure testing. Results There was no difference in mean arytenoid single‐cycle load‐to‐failure for the E thibond (206.9 ± 13.1 N) constructs compared with ALPS (220.6 ±17.1 N) constructs ( P = .486). In the cricoid under single‐cycle testing, the ALPS (236.0 ± 23.4 N) constructs were significantly stronger than the Ethibond (161.5 ± 12.2 N) constructs ( P = .013). The combined distraction was significantly greater for E thibond (6.29 ± 1.24 mm) constructs compared to the ALPS (3.43 ± 0.28 mm) constructs ( P = .033). Conclusions The ALPS construct was stiffer and at least as strong as the traditional laryngoplasty construct in single cycle failure in both the arytenoid and cricoid cartilages. Combined distraction was significantly reduced using the ALPS compared to the traditional laryngoplasty in vitro under cyclic testing.