Long-term outcome after stifle arthroscopy in 82 Western performance horses (2003-2010).
Authors: McCoy Annette M, Smith Rebecca L, Herrera Stephanie, Kawcak Christopher E, McIlwraith C Wayne, Goodrich Laurie R
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Long-term Outcomes of Stifle Arthroscopy in Western Performance Horses Stifle lameness represents a significant challenge in Western performance horses, yet limited data exist on surgical outcomes within these disciplines. McCoy and colleagues conducted a retrospective review of 82 Western performance horses (predominantly cutting, reining, and Western pleasure horses) that underwent stifle arthroscopy between 2003 and 2010, tracking return to intended use through owner interviews at minimum two years postoperatively. Only 40% of horses successfully returned to athletic performance, with substantially worse outcomes associated with increased age at surgery, higher grades of lameness, prolonged lameness duration preceding surgery, and the presence of partial-thickness cartilage lesions—factors that reduced odds of return to use by meaningful margins. Notably, postoperative interventions including intra-articular stem cells, corticosteroids, IL-1Ra, and hyaluronic acid/polysulfated glycosaminoglycans, as well as systemic therapies and oral supplements, showed no significant association with improved return-to-use rates. For practitioners advising owners on stifle arthroscopy in Western performance horses, these findings suggest a guarded prognosis similar to other equine disciplines, with prognostic optimism best reserved for younger horses with acute, mild lameness and intact cartilage; conversely, chronic lameness presentations and degenerative cartilage changes warrant candid discussions about realistic performance expectations regardless of the postoperative pharmaceutical strategy employed.
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Practical Takeaways
- •Stifle arthroscopy in Western performance horses carries guarded prognosis with <50% returning to work; set realistic client expectations upfront
- •Prognostic factors to discuss preoperatively: older horses, those with longer lameness duration, higher lameness grades, and cartilage damage have significantly poorer outcomes
- •Postoperative joint therapies (injections and supplements) do not improve return-to-use rates in this population, so focus on realistic rehabilitation timelines rather than expensive adjunctive treatments
Key Findings
- •Only 40% (32/82) of Western performance horses returned to intended use after stifle arthroscopy
- •Increased age, higher degree of lameness, longer lameness duration, and partial-thickness cartilage lesions significantly decreased odds of return to performance
- •Postoperative therapies including stem cells, corticosteroids, IL-1Ra, HA/PSGAG, NSAIDs, and oral supplements did not improve return-to-use outcomes