Long-term maintenance of arytenoid cartilage abduction and stability during exercise after laryngoplasty in 33 horses.
Abstract: To (1) assess long-term maintenance of arytenoid cartilage abduction (ACA) after laryngoplasty (LP); and (2) correlate the residual grade of ACA and postoperative abductory loss with arytenoid cartilage stability (ACS) during exercise. Methods: Case series. Methods: Horses re-examined after laryngoplasty (n = 33). Methods: Of 89 LP horses (2005-2010), 33 had historic ACA data available and upper airway endoscopy at rest and during over-ground exercise (mean, 33 months; range, 4-71 months) after surgery. ACA grade at 1 and 6 weeks postoperatively were correlated to long-term ACA grade. Effects of long-term ACA grade and magnitude of postoperative abductory loss on ACS during exercise were investigated. Results: Median ACA grade at 1 week (n = 33) was 2, reducing to grade 3 by week 6 (n = 16). Grade 3 abduction was maintained in the long-term. Correlation between ACA at 1 week and the long-term was poor (ρ = .43, P = .1), but there was good correlation between week 6 and long-term (ρ = .89, P < .001). Arytenoid cartilage instability was observed during exercise in 7/33 of horses, and not significantly associated with the ACA grade (P = .50), or the number of grades of ACA lost (P = .64). Conclusions: Limited abductory loss occurs after 6 weeks postoperatively. Resting ACA grade was not a useful predictor of ACS during exercise.
© Copyright 2013 by The American College of Veterinary Surgeons.
Publication Date: 2013-03-01 PubMed ID: 23452305DOI: 10.1111/j.1532-950X.2013.01109.xGoogle Scholar: Lookup
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- Journal Article
Summary
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The study evaluates the long-term ability of a surgical procedure called laryngoplasty to maintain the proper functioning of a part of the horse’s throat, the arytenoid cartilage, after surgery, and whether the success of the surgery can be predicted by conditions in the weeks following the operation. The research indicates that the procedure generally maintains functionality for an extended period of time and that early postoperative conditions can somewhat predict the ultimate success, but caution that these indicators aren’t fully reliable.
Research Methodology
- The study is a case series involving 33 horses that have undergone laryngoplasty. Of 89 initially operated between 2005 and 2010, these 33 specifically were selected because they had available data on arytenoid cartilage abduction (ACA), which is the movement of a part of the throat, at rest and during over-ground exercise after the surgery.
- The horses were examined for their ACA grade weeks 1 and 6 after their operations, and these were compared with the long-term ACA grades. In addition to the ACA grades, the researchers also assessed the stability of the arytenoid cartilage, called ACS, during exercise.
Key Findings
- Initial grades for ACA were mostly a 2 at one week but increased to 3 by six weeks. Long-term, grade 3 abduction was typical.
- The 1-week ACA grade didn’t provide a strong correlation to the long-term grade, while the 6-week grade demonstrated a good correlation with the long-term outcome.
- It was observed that arytenoid cartilage instability during exercise was seen in 7 out of 33 horses, and there wasn’t a significant association between this instability and the ACA grade or the number of grades lost.
Conclusions
- The amount of ACA lost after six weeks of surgery was found to be minimal.
- The resting ACA grade, initially thought to be a useful predictor of arytenoid cartilage stability during exercise, turned out not to be a highly effective indicator.
- Despite this, the results suggest that the long-term stability is largely maintained following laryngoplasty.
Cite This Article
APA
Barnett TP, O'Leary JM, Parkin TD, Dixon PM, Barakzai SZ.
(2013).
Long-term maintenance of arytenoid cartilage abduction and stability during exercise after laryngoplasty in 33 horses.
Vet Surg, 42(3), 291-295.
https://doi.org/10.1111/j.1532-950X.2013.01109.x Publication
Researcher Affiliations
- Royal (Dick) School of Veterinary Studies, Easter Bush Veterinary Centre, University of Edinburgh, Roslin, UK. timothy.barnett@ed.ac.uk
MeSH Terms
- Animals
- Arytenoid Cartilage / physiology
- Arytenoid Cartilage / surgery
- Female
- Horses / physiology
- Horses / surgery
- Laryngoplasty / veterinary
- Larynx / physiology
- Larynx / surgery
- Male
- Physical Conditioning, Animal / physiology
- Prostheses and Implants / veterinary
- Video Recording
Citations
This article has been cited 2 times.- Byrne CA, Hotchkiss JW, Barakzai SZ. Variations in the application of equine prosthetic laryngoplasty: A survey of 128 equine surgeons.. Vet Surg 2023 Feb;52(2):209-220.
- Sandersen C, Ceusters J, Fourez A, Tosi I, Graide H, Lejeune JP, Serteyn D. Nerve Stimulator-guided Injection of Autologous Stem Cells Near the Equine Left Recurrent Laryngeal Nerve.. J Vis Exp 2018 Sep 26;(139).
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