A biomechanical comparison of a novel two-loop suture technique and two sutures for laryngoplasty in the horse.

This study compares two suturing techniques used in equine laryngoplasty; the conventional 2-suture method and a novel 2-loop method. The research did not find a significant difference in durability or function between these techniques, suggesting both methods might be equally efficient.

Experimental Design and Methods

• The study used a total of 40 horse larynges to investigate two suturing techniques for laryngoplasty: a conventional two-suture method and an innovative two-loop approach.
• These larynges were divided into two groups. Sixteen were operated using the standard technique whereas the other 16 underwent the novel suture method.
• A test was performed involving a single-cycle-to-failure to measure the strength and endurance of both techniques. In this context, failure is defined as a breakdown of the suturing, which would represent complications or unsuccessful surgery in a real-life situation.
• The researchers also used eight specimens for a direct comparison, analyzing the area of the rima glottidis achieved by both techniques.

Results

• The research did not reveal a significant difference in the mean force to failure between the traditional 2-interrupted suture technique and the novel technique. This result suggests that both methods offer similar levels of strength, hence durability in the post-operative period.
• There was also no substantial difference observed in the rima glottidis area achieved by the two constructs, indicating that both techniques can accomplish similar anatomical outcomes.
• The study also confirmed that the cricoid width did not significantly impact the force to failure, ruling out the patient’s anatomical variations as a possible influencing factor on the durability of the techniques.

Conclusions and Implications

• The conclusions from this study indicate that both the conventional two-suture technique and the novel two-loop technique can deliver similar outcomes in terms of strength and ability to replicate normal anatomy, thereby offering a similar degree of arytenoid abduction.
• The researchers opine that this novel two-loop pulley load-sharing suture technique could potentially constitute a new way to achieve – and crucially maintain – the desired degree of arytenoid abduction during laryngoplasty surgery.
• Suture strength is a critical factor in successful laryngoplasty, particularly in mitigating post-operative complications like failure to maintain the expected degree of abduction. Therefore, this study will provide new insights for surgeons and potentially enhance the treatment outcomes for horses with recurrent laryngeal neuropathy.