Laryngoplasty with ventriculectomy or ventriculocordectomy in 104 draft horses (1992-2000).
Authors: Kraus Beth M, Parente Eric J, Tulleners Eric P
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Laryngoplasty Outcomes in Draft Horses with Laryngeal Hemiplegia Laryngeal hemiplegia significantly compromises performance in competitive draft horses, yet surgical correction through laryngoplasty combined with ventriculectomy or ventriculocordectomy remains the standard treatment approach. This retrospective analysis evaluated 104 draft horses (111 procedures) treated between 1992 and 2000, tracking postoperative outcomes through endoscopic examination and owner/trainer interviews with performance-based scoring. Results demonstrated substantial efficacy: 92% of the 79 horses with follow-up data showed improvement, with 72% achieving complete elimination of abnormal respiratory noise and normal performance scores (score 3), whilst a further 20% remained performance-capable despite residual noise (score 2); achievement of ≥70% maximal arytenoid abduction post-operatively correlated with superior outcomes. Importantly, anesthetic complications in draft horses were notably higher than in lighter breeds (11% overall, including prolonged recovery and myopathy/neuropathy), warranting careful case selection and perioperative management, though the procedure remains justified given the high success rate in restoring competitive function. Practitioners should counsel draft horse owners that whilst laryngoplasty reliably improves exercise tolerance and often eliminates respiratory noise, the larger body mass and anaesthetic sensitivity of this population requires meticulous risk assessment and recovery protocols.
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Practical Takeaways
- •Laryngoplasty with ventriculectomy/ventriculocordectomy is an effective treatment for laryngeal hemiplegia in draft horses, with ~90% improving performance and 72% eliminating respiratory noise entirely
- •Anesthetic complications in draft horses are higher than in light horses (11% total), so informed consent and careful anesthetic management are essential
- •Maximizing postoperative abduction angle (≥70% of maximum) appears important for achieving normal performance without respiratory noise
Key Findings
- •92% of 79 draft horses showed improvement in postoperative performance (exercise tolerance) after laryngoplasty with ventriculectomy or ventriculocordectomy
- •72% of horses had complete elimination of respiratory noise postoperatively
- •Postoperative complications included prolonged recovery (4%), myopathy/neuropathy (7%), with one fatal outcome
- •Horses achieving ≥70% maximal abduction postoperatively showed trend toward score 3 performance (normal function)