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Spectrum analysis of respiratory sounds in exercising horses with experimentally induced laryngeal hemiplegia or dorsal displacement of the soft palate.
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). Methods: 5 Standardbred horses. Methods: 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. Results: 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. Conclusions: 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 obstruction are also associated with unique sound patterns, spectrum analysis of respiratory sounds may prove to be useful in the diagnosis of airway abnormalities in horses.
Publication Date: 2001-05-09 PubMed ID: 11341381DOI: 10.2460/ajvr.2001.62.659Google Scholar: Lookup The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
- Journal Article
Summary
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The research article discusses a study where the respiratory sounds in exercising horses were analyzed to understand if specific sound patterns would help identify conditions like laryngeal hemiplegia and dorsal displacement of the soft palate. The study found unique sound patterns for both conditions and proposed the possible utility of spectrum analysis of respiratory sounds for diagnosing airway abnormalities in horses.
Methods
- The study was conducted on five Standardbred horses.
- Respiratory sounds, pharyngeal pressure, and stride frequency were recorded while the horses exercised at speeds corresponding to their maximum heart rate.
- These measurements were taken both before and after the experimental induction of laryngeal hemiplegia (LH) and dorsal displacement of the soft palate (DDSP) conditions in the horses.
Results
- Under normal airway function, expiratory sounds predominated and lasted throughout exhalation.
- When LH was induced, while the expiratory sounds were unaffected, inspiratory sounds with three distinct frequency bands emerged. These bands were centered at approximately 0.3, 1.6, and 3.8 kHz.
- When DDSP was induced, while the inspiratory sounds were unaffected, a new, broad-frequency expiratory sound with rapid periodicity (described as a rattling sound) was identified during expiration. However, this sound was not consistently detected in all horses.
Conclusions
- The technique employed for recording the respiratory sounds was found to be well-tolerated by the horses, besides being easy and cost-effective.
- Spectrum analysis of the recorded respiratory sounds revealed unique sound patterns associated with LH and DDSP.
- The research concludes by proposing that if other airway obstruction-related conditions also generate unique sound patterns, then the spectrum analysis of respiratory sounds might prove useful for diagnosing such abnormalities in horses.
Cite This Article
APA
Derksen FJ, Holcombe SJ, Hartmann W, Robinson NE, Stick JA.
(2001).
Spectrum analysis of respiratory sounds in exercising horses with experimentally induced laryngeal hemiplegia or dorsal displacement of the soft palate.
Am J Vet Res, 62(5), 659-664.
https://doi.org/10.2460/ajvr.2001.62.659 Publication
Researcher Affiliations
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing 48824, USA.
MeSH Terms
- Animals
- Cross-Over Studies
- Female
- Hemiplegia / etiology
- Hemiplegia / physiopathology
- Hemiplegia / veterinary
- Horses / physiology
- Larynx / physiology
- Male
- Palate, Soft / physiopathology
- Physical Conditioning, Animal / adverse effects
- Physical Conditioning, Animal / physiology
- Respiratory Sounds / physiology
- Respiratory Sounds / veterinary
- Tape Recording
- Vocal Cord Paralysis / etiology
- Vocal Cord Paralysis / physiopathology
- Vocal Cord Paralysis / veterinary
Citations
This article has been cited 2 times.- Lean NE, Sole-Guitart A, Ahern BJ. Laryngeal tie-forward in standing sedated horses. Vet Surg 2023 Feb;52(2):229-237.
- Jean D, Picandet V, Céleste C, Macieira S, Cesarini C, Morisset S, Rossier Y, Marcoux M. Palatal sclerotherapy for the treatment of intermittent dorsal displacement of the soft palate in 51 standardbred racehorses. Can Vet J 2011 Nov;52(11):1203-8.
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