Spectrum analysis of respiratory sounds in exercising horses with experimentally induced laryngeal hemiplegia or dorsal displacement of the soft palate

American Journal of Veterinary Research
F J DerksenJ A Stick

Abstract

To record respiratory sounds in exercising horses and determine whether spectrum analysis could be use to identify sounds specific for laryngeal hemiplegia (LH) and dorsal displacement of the soft palate (DDSP). 5 Standardbred horses. Respiratory sounds were recorded and pharyngeal pressure and stride frequency were measured while horses exercised at speeds corresponding to maximum heart rate, before and after induction of LH and DDSP. When airway function was normal, expiratory sounds predominated and lasted throughout exhalation. After induction of LH, expiratory sounds were unaffected; however, all horses produced inspiratory sounds characterized by 3 frequency bands centered at approximately 0.3, 1.6, and 3.8 kHz. After induction of DDSP, inspiratory sounds were unaffected, but a broad-frequency expiratory sound, characterized by rapid periodicity (rattling) was heard throughout expiration. This sound was not consistently detected in all horses. The technique used to record respiratory sounds was well tolerated by the horses, easy, and inexpensive. Spectrum analysis of respiratory sounds from exercising horses after experimental induction of LH or DDSP revealed unique sound patterns. If other conditions causing airway obstr...Continue Reading

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Citations

Dec 21, 2002·American Journal of Veterinary Research·Christina S CableL Vincent Soderholm
Feb 17, 2007·Journal of the American Veterinary Medical Association·Elizabeth J DavidsonEric J Parente
Dec 18, 2007·Journal of the American Veterinary Medical Association·Cortney E HendersonJennifer A Brown
Nov 28, 2006·Equine Veterinary Journal·P RobinsonN E Robinson
Apr 4, 2007·Equine Veterinary Journal. Supplement·C CotrelA Courouce-Malblanc
Jul 1, 2009·Equine Veterinary Journal·P M DixonS Z Barakzai
Aug 17, 2006·Veterinary Surgery : VS·Jeffrey E BrakenhoffJohn P Caron
Mar 2, 2013·Equine Veterinary Journal. Supplement·F CompostellaS H Franklin
May 16, 2003·The Veterinary Clinics of North America. Equine Practice·Celia L M Davenport-Goodall, Eric J Parente
May 16, 2003·The Veterinary Clinics of North America. Equine Practice·Ian C FultonFredrik J Derksen
May 16, 2003·The Veterinary Clinics of North America. Equine Practice·Elizabeth J Davidson, Benson B Martin
Aug 24, 2005·Veterinary Surgery : VS·Jennifer A BrownN Edward Robinson
Jun 6, 2009·Journal of Applied Physiology·Jonathan CheethamNorm G Ducharme
May 21, 2003·Equine Veterinary Journal·S H FranklinJ F Burn
May 21, 2003·Equine Veterinary Journal·F J Derksen
Oct 1, 2003·Equine Veterinary Journal·J A BrownN E Robinson
Jul 16, 2004·Equine Veterinary Journal·J A BrownN E Robinson
Dec 8, 2004·Equine Veterinary Journal·P M Dixon, S J Holcombe

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