Evaluation of a canine cranial cruciate ligament repair system for use in equine laryngoplasty.
Authors: Scherzer Sabine, Hainisch Edmund K
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Equine Laryngoplasty Using a Canine Orthopaedic Suture System Left laryngeal hemiplegia remains a significant cause of exercise-induced respiratory obstruction in horses, and traditional surgical approaches have variable long-term success rates due to tension loss and arytenoid cartilage collapse. Scherzer and Hainisch evaluated whether a commercially available monofilament nylon suture system originally designed for canine cruciate ligament repair could be repurposed as a prosthesis for arytenoid cartilage abduction during laryngoplasty, testing it first in five cadaver specimens before proceeding to seven clinical cases. The tensioning device incorporated a ratchet mechanism that allowed precise control of abduction angle under transnasal endoscopic visualisation, with suture fixation achieved via crimped metal clamps; critically, the crimped configuration maintained tension without slippage during the initial procedure. Post-operative outcomes were encouraging: four horses experienced only slight tension loss and one showed complete loss due to cartilage failure, yet all seven horses remained free from abnormal respiratory noise, exercise intolerance and cough during the convalescence period evaluated. For practitioners managing laryngeal hemiplegia cases, this work suggests that adopting purpose-designed suture tensioning systems with metal crimps may offer superior control of arytenoid positioning compared to traditional knot-based fixation, potentially improving long-term surgical durability and functional outcomes.
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Practical Takeaways
- •This nylon suture prosthesis offers a viable alternative to traditional laryngoplasty methods with controllable, adjustable arytenoid abduction via the ratchet mechanism—useful for surgeons seeking improved intraoperative precision.
- •Expect some postoperative tension loss in a minority of cases; cartilage integrity during fixation is critical to long-term success.
- •Clinical outcomes appear favorable for respiratory function, though this is a small case series and longer-term follow-up data on athletic performance would strengthen confidence in the technique.
Key Findings
- •A canine-designed nylon suture system successfully abducted arytenoid cartilage in 7 horses with laryngeal hemiplegia using a ratchet tensioning mechanism.
- •Crimped clamp fixation maintained tension without slippage during the procedure, though 4 horses had slight postoperative tension loss and 1 had complete loss due to cartilage failure.
- •No horses developed postoperative respiratory noise, exercise intolerance, or cough after convalescence, suggesting functional success of the procedure.