Document Detail

Effects of inhaled ipratropium bromide on breathing mechanics and gas exchange in exercising horses with chronic obstructive pulmonary disease.
MedLine Citation:
PMID:  11817550     Owner:  NLM     Status:  MEDLINE    
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.
W M Bayly; D H Duvivier; D Votion; S Vandenput; T Art; P Lekeux
Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Equine veterinary journal     Volume:  34     ISSN:  0425-1644     ISO Abbreviation:  Equine Vet. J.     Publication Date:  2002 Jan 
Date Detail:
Created Date:  2002-01-30     Completed Date:  2002-05-14     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0173320     Medline TA:  Equine Vet J     Country:  England    
Other Details:
Languages:  eng     Pagination:  36-43     Citation Subset:  IM    
Department of Veterinary Clinical Sciences, Washington State University, Pullman, USA.
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MeSH Terms
Administration, Inhalation
Bronchodilator Agents / administration & dosage*,  therapeutic use
Cross-Over Studies
Exercise Test / veterinary
Horse Diseases / drug therapy*
Ipratropium / administration & dosage*,  therapeutic use
Nebulizers and Vaporizers
Oxygen Consumption / drug effects,  physiology
Physical Conditioning, Animal
Pulmonary Disease, Chronic Obstructive / drug therapy,  veterinary*
Pulmonary Gas Exchange / drug effects*,  physiology
Respiratory Mechanics / drug effects*,  physiology
Reg. No./Substance:
0/Aerosols; 0/Bronchodilator Agents; 60205-81-4/Ipratropium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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