A novel treatment for dynamic laryngeal collapse associated with poll flexion: the modified checkrein.
Authors: Fjordbakk C T, Holcombe S, Fintl C, Chalmers H, Strand E
Journal: Equine veterinary journal
Summary
Dynamic laryngeal collapse triggered by excessive poll flexion represents a significant performance limitation in Coldblooded trotters, yet conventional surgical and conservative approaches have consistently failed to restore racing ability in affected horses. Fjordbakk and colleagues investigated whether a modified checkrein—a device that allows functional upper airway patency whilst preventing the extreme poll flexion that precipitates inspiratory obstruction—could circumvent this problem in a population of affected horses. The modified checkrein maintained laryngeal function during ridden work by restricting poll flexion to a degree sufficient to prevent dynamic collapse without compromising performance mechanics. This novel approach addresses a critical gap in management options, offering farriers, veterinarians and trainers a practical intervention for horses where conventional surgical treatment has been exhausted. For practitioners working with performance horses, particularly those in harness racing disciplines, this device represents a biomechanical solution that warrants consideration as part of a multimodal management strategy when traditional therapies prove inadequate.
Read the full abstract on PubMed
Practical Takeaways
- •Consider modified checkrein as an alternative management strategy for Coldblooded trotters with poll flexion-induced laryngeal collapse when conventional treatments fail to restore racing performance
- •Recognize that rein tension and poll flexion are direct mechanical triggers of airway obstruction in affected horses—management modifications may complement other interventions
- •This technique may offer a functional solution for performance horses where surgery has not improved outcomes
Key Findings
- •Dynamic laryngeal collapse associated with poll flexion is a performance-limiting disorder in Coldblooded trotters that occurs during rein tension
- •Modified checkrein technique presents a novel treatment approach for DLC when traditional surgical and conservative management have failed
- •The condition manifests as inspiratory obstruction triggered by poll flexion induced during driving with rein tension