Effects of unilateral laser-assisted ventriculocordectomy in horses with laryngeal hemiplegia.
Abstract: Recent studies have evaluated surgical techniques aimed at reducing noise and improving airway function in horses with recurrent laryngeal neuropathy (RLN). These techniques require general anaesthesia and are invasive. A minimally invasive transnasal surgical technique for treatment of RLN that may be employed in the standing, sedated horse would be advantageous. Objective: To determine whether unilateral laser-assisted ventriculocordectomy (LVC) improves upper airway function and reduces noise during inhalation in exercising horses with laryngeal hemiplegia (LH). Methods: Six Standardbred horses were used; respiratory sound and inspiratory transupper airway pressure (Pui) measured before and after induction of LH, and 60, 90 and 120 days after LVC. Inspiratory sound level (SL) and the sound intensities of formants 1, 2 and 3 (Fl, F2 and F3, respectively), were measured using computer-based sound analysis programmes. In addition, upper airway endoscopy was performed at each time interval, at rest and during treadmill exercise. Results: In LH-affected horses, Pui, SL and the sound intensity of F2 and F3 were increased significantly from baseline values. At 60 days after LVC, Pui and SL had returned to baseline, and F2 and F3 values had improved partially compared to LH values. At 90 and 120 days, however, SL increased again to LH levels. Conclusions: LVC decreases LH-associated airway obstruction by 60 days after surgery, and reduces inspiratory noise but not as effectively as bilateral ventriculocordectomy. Conclusions: LVC may be recommended as a treatment of LH, where reduction of upper airway obstruction and respiratory noise is desired and the owner wishes to avoid risks associated with a laryngotomy incision or general anaesthesia.
Publication Date: 2006-11-28 PubMed ID: 17124837DOI: 10.2746/042516406x154813Google Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov't
- Anesthesia
- Clinical Pathology
- Clinical Study
- Clinical Symptoms
- Diagnosis
- Diagnostic Technique
- Disease Diagnosis
- Disease Treatment
- Equine Health
- Exercise
- Horses
- In Vivo
- Laryngeal Dysfunction
- Minimally Invasive Surgery
- Respiratory Disease
- Respiratory Health
- Standardbred Horses
- Surgery
- Veterinary Medicine
- Veterinary Procedure
Summary
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This research investigates the effects of a minimally invasive surgical procedure, unilateral laser-assisted ventriculocordectomy (LVC), on horses suffering from laryngeal hemiplegia (LH), a recurrent laryngeal neuropathy. The study found that LVC improved upper airway function and reduced the noise during inhalation in exercising horses, suggesting it could be recommended as a treatment for LH.
Objective and Methodology
- The study’s goal was to determine if unilateral laser-assisted ventriculocordectomy (LVC) could enhance upper airway function and lessen the noise produced during inhalation in horses impacted by laryngeal hemiplegia (LH).
- Six Standardbred horses were used in the experiment, which measured respiratory sound and inspiratory transupper airway pressure (Pui) before and after LH induction, and 60, 90, and 120 days post-LVC.
- The group also utilized computer-based sound analysis programs to measure inspiratory sound level (SL) and the sound intensities of formants 1, 2, and 3 (Fl, F2, and F3).
Results
- After inducing LH in horses, Pui, SL, and the sound intensity of F2 and F3 increased significantly compared to baseline values.
- 60 days post-LVC, Pui and SL returned to baseline levels, and F2 and F3 values showed partial improvement in contrast to LH values.
- However, upon reaching the 90 and 120-day marks, SL levels rose back to LH levels.
Conclusions
- According to the findings, LVC effectively decreases LH-associated airway obstruction within 60 days post-surgery and decreases inspiratory noise but not as effectively as bilateral ventriculocordectomy (a more invasive procedure).
- For laryngeal hemiplegia treatment where reducing upper airway obstruction and respiratory noise is desired, and the horse owner wants to avoid risks associated with laryngotomy incision or general anesthesia, LVC may be recommended.
Cite This Article
APA
Robinson P, Derksen FJ, Stick JA, Sullins KE, DeTolve PG, Robinson NE.
(2006).
Effects of unilateral laser-assisted ventriculocordectomy in horses with laryngeal hemiplegia.
Equine Vet J, 38(6), 491-496.
https://doi.org/10.2746/042516406x154813 Publication
Researcher Affiliations
- Department of Large Animal Clinical Sciences, Michigan State University, East Lansing, Michigan 48824.
MeSH Terms
- Animals
- Female
- Hemiplegia / surgery
- Hemiplegia / veterinary
- Horse Diseases / surgery
- Horses
- Laryngectomy / methods
- Laryngectomy / veterinary
- Laser Therapy / methods
- Laser Therapy / veterinary
- Male
- Minimally Invasive Surgical Procedures / methods
- Minimally Invasive Surgical Procedures / veterinary
- Physical Conditioning, Animal / physiology
- Pressure
- Respiratory Sounds / veterinary
- Risk Factors
- Time Factors
- Treatment Outcome
- Vocal Cord Paralysis / surgery
- Vocal Cord Paralysis / veterinary
- Vocal Cords / surgery
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