Equine laryngoplasty: Effects of three anchoring techniques in the muscular process and three positions for suture implantation in the cricoid cartilage.
Authors: Maire Ulrika, Ducharme Norm G, Rossignol Anthony, Campos Schweitzer Ariane, Rossignol Fabrice
Journal: Veterinary surgery : VS
Summary
# Editorial Summary Recurrent laryngeal neuropathy remains a significant performance limitation in horses, with laryngoplasty serving as the primary surgical management; however, optimising the biomechanical efficiency of different anchoring and suture placement techniques could reduce surgical morbidity and enable combined therapeutic approaches. Researchers compared three anchoring methods in the muscular process (titanium corkscrew, and two needle-passage techniques) combined with three cricoid cartilage implantation positions using 22 cadaveric larynges, measuring the force required for adequate arytenoid abduction, laryngeal rotation, and cricoarytenoid dorsalis (CAD) muscle distortion. The titanium corkscrew required substantially less force for optimal abduction (7.45 ± 4 N versus higher values for needle techniques; p < 0.01), whilst producing minimal CAD muscle indentation (2.01 ± 1.25 mm) and least laryngeal rotation (9 ± 3.87°). For farriers and veterinary surgeons managing recurrent laryngeal neuropathy cases, these findings suggest that corkscrew anchoring positioned at the CAD tendon insertion point offers superior biomechanical efficiency and reduced soft tissue trauma compared to traditional needle-based techniques—advantages that may prove particularly valuable when combining laryngoplasty with adjunctive nerve grafting procedures to restore neuromuscular function.
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Practical Takeaways
- •The titanium corkscrew anchoring technique offers biomechanical advantages over traditional Jamshidi needle methods, requiring less force and causing less tissue disruption during laryngoplasty
- •Corkscrew implantation may enable more physiologic muscle function by minimizing CAD muscle indentation and laryngeal rotation, potentially improving long-term surgical outcomes
- •This technique opens possibilities for combined nerve graft procedures in recurrent laryngeal neuropathy cases, which could improve functional recovery beyond current single-procedure approaches
Key Findings
- •Titanium corkscrew anchoring required significantly lower force (7.45±4 N) for optimal arytenoid abduction compared to Jamshidi needle techniques
- •Corkscrew technique produced minimal CAD muscle indentation (2.01±1.25 mm) and less laryngeal rotation (9±3.87°) than needle-based methods
- •Corkscrew implantation at the CAD tendon insertion point minimized interference with muscle compartments and avoided laryngeal deformation
- •Combined nerve graft and laryngoplasty may be feasible using corkscrew technique due to reduced tissue trauma