Assessment of the cricoarytenoideus dorsalis muscle (CAD) in horses using a transesophageal ultrasound, computed tomography, or magnetic resonance imaging is available in a limited number of hospitals. This study assessed the ease of ultrasonographic imaging of the CAD using an external transcutaneous technique in horses. After confirmation of the CAD in the cadavers, ultrasonography in twenty live horses was carried out using a transcutaneous approach. In live horses, ultrasonographic imaging of the CAD was possible by pushing the larynx from the opposite side with the other hand. It is believed that the results of this study may be beneficial in the examination of recurrent laryngeal neuropathy.
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| http://dx.doi.org/10.1016/j.jevs.2019.03.007 | DOI Listing |
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Objective: To compare the effects of three anchoring techniques in the muscular process and three positions of laryngoplasty suture implantation in the cricoid cartilage on abduction of the arytenoid cartilage and interaction with the cricoarytenoid dorsalis (CAD) muscle compartments.
Study Design: Experimental study.
Sample Population: Twenty-two cadaveric equine larynges.
Evaluation of recurrent laryngeal neuropathy in domestic and feral horse populations in Australia using histologic and immunohistochemical analysis: A pilot study.
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July 2023
Equine Specialist Hospital, School of Veterinary Science, University of Queensland, UQ Gatton Campus, Gatton, Queensland, Australia.
Article Synopsis
- The study examines differences between domestic and feral horses in terms of the left recurrent laryngeal nerve (Lrln) and left cricoarytenoideus dorsalis (LCAD) muscle, focusing on possible implications for recurrent laryngeal neuropathy (RLN).
- Sixteen horses (8 domestic and 8 feral) were analyzed using histological and immunohistochemical methods after being harvested at an abattoir, revealing some differences in muscle fiber types and regeneration patterns.
- Results indicated that domestic horses showed more signs of nerve regeneration consistent with RLN and had a higher percentage of type IIX muscle fibers compared to feral horses, prompting further investigation to determine the significance of these findings.
Objective: To create a model of transient unilateral laryngeal paralysis (LP) that will allow the study of cricoarytenoideus dorsalis dysfunction and a method for quantification of varying degrees of LP in dogs.
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A lateral surgical approach to the larynx may impair cervical esophageal function in dogs.
Am J Vet Res
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Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC.
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Background: Selective laryngeal reinnervation using the first and second cervical nerve (C1C2) is a treatment option for recurrent laryngeal neuropathy that aims to restore the function of the cricoarytenoideus dorsalis (CAD) muscle. Despite the technique's satisfying success rate, it has several limitations. These triggered the search for another potential donor nerve that could reduce CAD muscle fatigue and shorten rehabilitation.
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