Long-term maintenance of arytenoid cartilage abduction and stability during exercise after laryngoplasty in 33 horses

Barnett, T. P., O'Leary, J. M., Parkin, T. D.H. , Dixon, P. M. and Barakzai, S. Z. (2013) Long-term maintenance of arytenoid cartilage abduction and stability during exercise after laryngoplasty in 33 horses. Veterinary Surgery, 42(3), pp. 291-295. (doi:10.1111/j.1532-950X.2013.01109.x)

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Publisher's URL: http://dx.doi.org/10.1111/j.1532-950X.2013.01109.x

Abstract

<b>Objectives</b> 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.<p></p> <b>Study Design</b> Case series.<p></p> <b>Animals</b> Horses re-examined after laryngoplasty (n = 33).<p></p> <b>Methods</b> 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.<p></p> <b>Results</b> 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).<p></p> <b>Conclusions</b> Limited abductory loss occurs after 6 weeks postoperatively. Resting ACA grade was not a useful predictor of ACS during exercise.<p></p>

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Parkin, Professor Timothy
Authors: Barnett, T. P., O'Leary, J. M., Parkin, T. D.H., Dixon, P. M., and Barakzai, S. Z.
College/School:College of Medical Veterinary and Life Sciences > School of Veterinary Medicine
Journal Name:Veterinary Surgery
Publisher:Wiley
ISSN:0161-3499
ISSN (Online):1532-950X

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