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J Vet Sci 2018; 19(6): 835-839  https://doi.org/10.4142/jvs.2018.19.6.835
Comparison of two techniques for transpharyngeal endoscopic auditory tube diverticulotomy in the horse
Drew W. Koch1, Jeremiah T. Easley1, Brad B. Nelson1, Jeremy J. Delcambre2, Erin G. McCready1, Eileen S. Hackett1,*
Departments of 1Clinical Sciences and 2Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA
Correspondence to: Tel: +1-970-297-4035; Fax: +1-970-297-1274; E-mail: Eileen.Hackett@colostate.edu
Received: April 26, 2018; Revised: August 22, 2018; Accepted: August 27, 2018; Published online: November 30, 2018.
Auditory tube diverticula, also known as guttural pouches, are naturally occurring dilations of the auditory tube in horses that communicate with the nasopharynx through a small ostium. Infection and select other conditions can result in inflammation and narrowing of the nasopharyngeal ostium, which prevents drainage of fluid or egress of air and can lead to persistent infection or guttural pouch tympany. Auditory tube diverticulotomy allows continuous egress from the auditory tube diverticula and is a feature of disease treatment in horses, in which medical treatment alone is not successful. Transpharyngeal endoscopic auditory tube diverticulotomy was performed using a diode laser either at a single dorsal pharyngeal recess location or bilaterally caudal to the nasopharyngeal ostium in 10 horse head specimens. Both methods resulted in clear communication between the nasopharynx and auditory tube diverticula. Diverticulotomy performed in the dorsal pharyngeal recess required less laser energy and activation time and had a shorter surgical duration than diverticulotomy performed caudal to the nasopharyngeal ostium. Further study related to the clinical application of both techniques is warranted.
Keywords: diode lasers, empyema, endoscopic surgical procedure, laser surgery, veterinary surgery

© 2018 The Korean Society of Veterinary Science.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.