[en] Six Warmblood horses suffering an acute exacerbation of COPD were tested to investigate whether inhalation of ipratropium bromide (IB) dry powder (2,400 microg) 30 min preexercise would improve their exercise capacity. A cross-over protocol with an inert powder placebo (P) was used. Mechanics of breathing and arterial blood gases were determined before treatment, after treatment but pre-exercise, and during an incremental exercise test. Oxygen consumption (VO2) was also measured before and during exercise, and the time to fatigue recorded. Inhalation of IB reduced total pulmonary resistance (RL) and maximum intrapleural pressure changes (deltaPpl(max)) and increased dynamic compliance before exercise. The onset of exercise was associated with a marked decrease in RL in P-treated horses but not those receiving IB, so that RL during exercise was not affected by treatment. Although deltaPpl(max) was lower at 8,9 and 10 m/s with IB, there were no treatment-related changes in VO2, blood gases, time to fatigue or any other measurement of breathing mechanics. Therefore, although inhalation of IB prior to exercise may have improved deltaPpl(max), it had no apparent impact on the horses' capacity for exercise.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Bayly, W. M.; Washington State University Pullman, USA > Department of Veterinary Clinical Sciences
Duvivier, D. H.; Université de Liège - ULiège > Faculté de Médecine Vétérinaire > Physiologie
Votion, Dominique ; Université de Liège - ULiège > Faculté de Médecine Vétérinaire > Physiologie
Vandenput, Sandrina ; Université de Liège - ULiège > Faculté de Médecine Vétérinaire > Physiologie
Art, Tatiana ; Université de Liège - ULiège > Faculté de Médecine Vétérinaire > Physiologie
Lekeux, Pierre ; Université de Liège - ULiège > Faculté de Médecine Vétérinaire > Physiologie
Language :
English
Title :
Effects of inhaled ipratropium bromide on breathing mechanics and gas exchange in exercising horses with chronic obstructive pulmonary disease
Publication date :
2002
Journal title :
Equine Veterinary Journal
ISSN :
0425-1644
eISSN :
2042-3306
Publisher :
Equine Veterinary Journal Ltd, Newmarket Suffolk, United Kingdom
scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.
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