A comparison of techniques to enhance the evaluation of equine laryngeal function.
Equine Vet J
; 23(2): 104-7, 1991 Mar.
Article
em En
| MEDLINE
| ID: mdl-2044504
ABSTRACT
This study was designed to define a simple, unequivocal test for the evaluation of laryngeal function and the diagnosis of idiopathic laryngeal hemiplegia (ILH). ILH is a disorder that results from left recurrent laryngeal neuropathy and in which there is no movement of the left arytenoid cartilage and vocal fold. Laryngeal function was evaluated in seven horses using four techniques designed to stimulate laryngeal movements-nasal occlusion, exercise, swallowing and administration of a respiratory stimulant. In addition, the effects of sedation and twitching on the endoscopic examination were also examined. The cross-sectional area of the rima glottidis was measured in each horse at rest and after each technique was performed. There was no statistically significant difference in the increase in area seen after nasal occlusion or exercise. Doxapram hydrochloride increased the cross-sectional area of the rima glottidis, whereas xylazine caused a decrease. Neither of these pharmacological agents exaggerated or decreased the amount of asynchronous movement or tremoring of the arytenoid cartilages. Manual occlusion of the external nares during endoscopy is a simple, yet effective method of stimulating arytenoid function and hence diagnosing ILH.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Paralisia das Pregas Vocais
/
Hemiplegia
/
Doenças dos Cavalos
/
Laringe
Tipo de estudo:
Diagnostic_studies
/
Guideline
Limite:
Animals
Idioma:
En
Revista:
Equine Vet J
Ano de publicação:
1991
Tipo de documento:
Article