Laryngoplasty with ventriculectomy or ventriculocordectomy in 104 draft horses (1992-2000).

The research article discusses the effectiveness and safety of using laryngoplasty with ventriculectomy or ventriculocordectomy to treat laryngeal hemiplegia in draft horses. The study, conducted on 104 draft horses over a period of eight years, suggests that this surgical treatment can significantly improve the performance of the horses, reduce abnormal respiratory noise, and is subsequently recommended.

Methods of Research

In order to weigh the safety and effectiveness of laryngoplasty with either ventriculectomy (VE) or ventriculocordectomy (VCE) as a treatment for laryngeal hemiplegia (LH) in draft horses, a retrospective study was carried out. The following points are relevant to the methods used in the research:

• The study focused on draft horses used for competitive hitch competitions diagnosed with LH.
• Medical records and postoperative endoscopy were reviewed for the horses treated with laryngoplasty and VE or VCE between January 1992 and December 2000.
• Follow-up was conducted through phone interviews with horse owners and trainers.
• A performance rating scale, ranging from 1 to 3, was assigned, with 1 being unable to perform, 2 able to perform but not for its designated use, and 3 performing as expected.

Results of the Study

The following points summarize the core results found in the research:

• The study included 104 horses, all having preoperative performance scores of 1, that underwent 111 laryngoplasty procedures.
• Of these, postoperative information was available for 79 horses.
• An improvement in postoperative performance was reported for 92% of the horses.
• Respiratory noise, a primary symptom of LH, was eliminated in 72% of the horses.
• Based on the established performance scale, postoperative scores were: 3 in 72% of the horses, 2 in 20% of them, and 1 in 8%.
• There were some reports of post-anesthesia complications, including prolonged recovery (in 4% of the horses) and myopathy or neuropathy (in 7%). In an extreme case, one horse was euthanized due to its inability to stand, where triceps myopathy and encephalopathy were confirmed on necropsy.

Conclusions Drawn from the Research

The authors reached several conclusions based on their research findings:

• Laryngoplasty with VE or VCE is an effective and safe procedure in treating LH in draft horses.
• Repeat laryngoplasty can be successfully performed with good performance outcome even after laryngoplasty failure.
• The probability of complications with general anesthesia and laryngoplasty is higher in draft horses than in light breed horses under similar conditions.
• The authors propose that laryngoplasty with VCE or VE under general anesthesia should be recommended for LH to eliminate abnormal respiratory noises and improve performance in competitive hitch draft horses.