Abstract presented at 2005 World Equine Airways Symposium, July 22, 2005, Ithaca, NY, and at 2005 American College of Veterinary Radiology Annual Scientific Conference, November 30, Chicago, IL.
ULTRASONOGRAPHY OF THE EQUINE LARYNX
Article first published online: 23 AUG 2006
Veterinary Radiology & Ultrasound
Volume 47, Issue 5, pages 476–481, September–October 2006
How to Cite
CHALMERS, H. J., CHEETHAM, J., YEAGER, A. E. and DUCHARME, N. G. (2006), ULTRASONOGRAPHY OF THE EQUINE LARYNX. Veterinary Radiology & Ultrasound, 47: 476–481. doi: 10.1111/j.1740-8261.2006.00170.x
- Issue published online: 23 AUG 2006
- Article first published online: 23 AUG 2006
- Received September 15, 2005; accepted for publication March 24, 2006.
Nasopharyngeal and laryngeal evaluation is important when examining horses with upper airway signs for poor performance. Currently endoscopy is the most common method to evaluate the equine upper airway. Ultrasonography of the equine larynx has not previously been described. Using six cadaveric specimens and four standing horses, the ultrasonographic appearance of the equine larynx was established. A scanning technique, including useful acoustic windows and the normal ultrasonographic appearance at each site, is described. Ultrasound allowed visualization of portions of the hyoid apparatus, laryngeal cartilages, associated soft tissues, and intrinsic and extrinsic laryngeal musculature, that are not seen using endoscopy. Additionally, real-time ultrasound allowed observation of the movement of the vocal folds and the arytenoid cartilages during respiration. In three horses with arytenoid chondritis, ultrasonography aided in the diagnosis and localization of arytenoid abcessation and perilaryngeal inflammation. The establishment of this technique will serve as the basis for future investigations in the evaluation of clinical patients with upper airway abnormalities.