Incidence of swallowing during exercise in horses with dorsal displacement of the soft palate.
Equine Vet J
; 42(8): 732-7, 2010 Nov.
Article
in En
| MEDLINE
| ID: mdl-21039804
ABSTRACT
REASONS FOR PERFORMING STUDY The relationship between dorsal displacement of the soft palate (DDSP) and swallowing is unclear. OBJECTIVE:
To quantify the relationship between DDSP and swallowing in horses at exercise. HYPOTHESES The frequency of swallowing increases immediately prior to DDSP in horses at exercise.METHODS:
Videoendoscopic and upper airway pressure data were collated from horses with a definitive diagnosis of DDSP at exercise. Horses with no upper airway abnormalities were matched by age, breed and sex and used as controls. Sixty-nine horses were identified with a definitive diagnosis of DDSP during the study interval. Airway pressure data were available for 42 horses.RESULTS:
The majority of horses displaced at high exercising speeds while accelerating; a smaller number displaced during deceleration after peak speed had been reached. Horses swallowed significantly more frequently in the 1 min immediately preceding DDSP than in the control horses at equivalent speeds. DDSP at exercise results in a significant increase in tracheal expiratory pressure, a significant decrease in pharyngeal expiratory pressure and a significantly less negative pharyngeal inspiratory pressure compared to matched controls and compared to the pressures during the 1 min interval prior to DDSP. There was no significant difference between any measure of airway pressure before or after a swallow when examined at each time interval in the DDSP population.CONCLUSIONS:
The frequency of swallowing decreases with increasing speed in normal horses. In contrast, the frequency of swallowing increases immediately prior to onset of DDSP. This is not a result of pharyngeal and tracheal pressure changes. POTENTIAL RELEVANCE The increased frequency of swallowing observed prior to DDSP may be related to the aetiology of the disease.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Palate, Soft
/
Deglutition
/
Airway Obstruction
/
Horse Diseases
Type of study:
Incidence_studies
/
Risk_factors_studies
Limits:
Animals
Language:
En
Journal:
Equine Vet J
Year:
2010
Document type:
Article
Affiliation country: