Postoperative race performance is not correlated with degree of surgical abduction after laryngoplasty in National Hunt Thoroughbred racehorses.
Authors: Barakzai Safia Z, Boden Lisa A, Dixon Padraic M
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Laryngoplasty Outcomes in National Hunt Thoroughbreds Recurrent laryngeal neuropathy (RLN) significantly impairs performance in racehorses, and whilst laryngoplasty with ventriculocordectomy is the standard surgical intervention, uncertainty exists about whether the degree of postoperative arytenoid cartilage abduction influences racing outcomes. Barakzai and colleagues assessed arytenoid abduction grades in 68 National Hunt Thoroughbreds at days 1, 6, and 6 weeks post-surgery, then correlated these findings with subsequent racing performance including return to racing, earnings in the first five races, and lifetime race starts. Although horses achieving maximal (grade 1) abduction on day 1 experienced significantly greater loss by day 6 compared to those with grade 3 abduction, no statistically significant relationship emerged between postoperative abduction grade at any timepoint and any measure of racing performance. This finding challenges the assumption that surgical perfection—maintaining grade 1 abduction chronically—is necessary for successful return to racing; most horses achieving moderate (grade 3) abduction demonstrated competitive race records, suggesting that the functional threshold for raceability is considerably lower than maximum surgical correction. Whilst the study's small number of horses with poor abduction (grades 4–5) prevents firm conclusions about their prognosis, the results should reassure clinicians that achieving and maintaining grade 3 abduction represents a realistic and sufficient target for National Hunt racehorses.
Read the full abstract on PubMed
Practical Takeaways
- •Surgeons should not be discouraged by moderate (grade 3) long-term laryngeal abduction after laryngoplasty, as it does not predict poor racing performance in National Hunt horses
- •Horses with excellent immediate postoperative abduction (grade 1) paradoxically lose more abduction over time; moderate initial abduction (grade 3) appears more stable
- •Abduction grade alone should not be used as a prognostic indicator for postoperative racing success in racehorses
Key Findings
- •Median arytenoid abduction decreased from grade 2 at day 1 to grade 3 by 6 weeks postoperatively
- •Horses with maximal (grade 1) surgical abduction on day 1 were significantly more likely to lose abduction by day 6 compared to grade 3 abduction (P<0.05)
- •No statistically significant correlation existed between postoperative abduction grade and return to racing, earnings in 5 postoperative races, or lifetime race starts
- •Most horses achieving grade 3 abduction at 6 weeks could race successfully despite moderate (not maximal) surgical outcome