Mechanical evaluation of the equine laryngoplasty.

The research paper discusses a study that evaluated the mechanical strength of equine laryngoplasty, a surgical procedure on horses’ throats, using different types of sutures. The findings suggest that the Ethibond suture was superior to the other types tested.

Methods

• The study involved experimental methods, using cadaveric cricoid and arytenoid cartilages as test samples. The number of cricoid samples tested was 36 and for arytenoid it was 46.
• For testing, these specimens were embedded, and sutures were inserted simulating the laryngoplasty procedures. Three types of suture materials were used: 2 Ethilon, 5 Ethibond, or 5 Fiberwire.
• The constructs were evaluated under single or cyclic loading. In single-cycle tests, the load at which failure occurred and the stiffness were recorded. In cyclic tests, the displacement after 10,000 cycles was recorded.
• Analysis of variance (ANOVA) and t-tests were used for data analysis.

Results

• The study found that in single cycle testing, the Ethibond constructs were stronger for both arytenoid and cricoid, compared to the Ethilon and Fiberwire constructs.
• The stiffness of the Ethilon constructs was lower for both the arytenoid and cricoid compared to the Ethibond and Fiberwire constructs.
• The arytenoids failed at a lower load than the cricoids for Ethilon and Fiberwire constructs, but not for Ethibond constructs.
• In cyclic testing, complete failure of either cartilage did not occur.
• In terms of distraction, Ethibond constructs resulted in less distraction than Ethilon and Fiberwire for both arytenoid and cricoid cartilages.

Conclusions

• The study concluded that Ethibond was superior to Ethilon and Fiberwire constructs in vitro.
• Loss of abduction after laryngoplasty is a common complication. The results of this study suggest that the use of Ethibond should minimize abduction loss after surgery relative to the other materials tested.