Post laryngoplasty ultrasonography of the horse larynx
type: CreativeWork
description: Laryngoplasty is commonly used to treat laryngeal hemiplegia in Thoroughbred racehorses and success and evaluation thereof has traditionally been determined using endoscopy with little emphasis on ultrasonography. Laryngeal ultrasonography can easily be performed in the standing unsedated horse and is relatively inexpensive. Ultrasonography of the normal horse larynx has been described, as have a number of pathological conditions that occur in the laryngeal and pharyngeal area. Postsurgical ultrasonographic evaluation of laryngoplasty has limited coverage in the literature and is limited to individual cases. The aim of the investigation was to evaluate and validate the use of transcutaneous ultrasonography in horses following laryngoplasty, as well as improving our understanding of the healing process and detecting postsurgical complications. Laryngeal hemiplegia is a relatively common condition and is of particular importance in Thoroughbred racehorses. Traditionally, postsurgical laryngoplasty management and success has been determined by, and monitored with, resting upper respiratory endoscopy. This modality is limited in that peri- and non-luminal laryngeal structures cannot be assessed. A prospective case series of 10 Thoroughbred racehorses with left recurrent laryngeal hemiplegia was examined prior to, 3-10 days, 30-50 days and 6-12 months after laryngoplasty and ventriculectomy, using transcutaneous ultrasonography and endoscopy. Arytenoid abduction was graded endoscopically at each of the examination times using the Havemeyer system for presurgery and the Dixon system postsurgery. The following measurements were made ultrasonographically: cricoarytenoideus lateralis muscle widest diameter, circumference and cross-sectional area; the distance between the vocal folds in exhalation and inhalation, basihyoid depth, rostral thyroid cartilage depth, and distance between the basihyoid and thyroid cartilage was also measured. The ultrasonographically visible presen…
abstract: Laryngoplasty is commonly used to treat laryngeal hemiplegia in Thoroughbred racehorses and success and evaluation thereof has traditionally been determined using endoscopy with little emphasis on ultrasonography. Laryngeal ultrasonography can easily be performed in the standing unsedated horse and is relatively inexpensive. Ultrasonography of the normal horse larynx has been described, as have a number of pathological conditions that occur in the laryngeal and pharyngeal area. Postsurgical ultrasonographic evaluation of laryngoplasty has limited coverage in the literature and is limited to individual cases. The aim of the investigation was to evaluate and validate the use of transcutaneous ultrasonography in horses following laryngoplasty, as well as improving our understanding of the healing process and detecting postsurgical complications. Laryngeal hemiplegia is a relatively common condition and is of particular importance in Thoroughbred racehorses. Traditionally, postsurgical laryngoplasty management and success has been determined by, and monitored with, resting upper respiratory endoscopy. This modality is limited in that peri- and non-luminal laryngeal structures cannot be assessed. A prospective case series of 10 Thoroughbred racehorses with left recurrent laryngeal hemiplegia was examined prior to, 3-10 days, 30-50 days and 6-12 months after laryngoplasty and ventriculectomy, using transcutaneous ultrasonography and endoscopy. Arytenoid abduction was graded endoscopically at each of the examination times using the Havemeyer system for presurgery and the Dixon system postsurgery. The following measurements were made ultrasonographically: cricoarytenoideus lateralis muscle widest diameter, circumference and cross-sectional area; the distance between the vocal folds in exhalation and inhalation, basihyoid depth, rostral thyroid cartilage depth, and distance between the basihyoid and thyroid cartilage was also measured. The ultrasonographically visible presen…
language: en
keywords: Unrestricted, UCTD
date published: 2018
date modified: 2026-07-24T03:52:42Z
provider: University of Pretoria
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Pretoria

PropertyValue
property ID: Handle
value: http://hdl.handle.net/2263/67807