Cold air-induced late-phase bronchoconstriction in horses.

TitleCold air-induced late-phase bronchoconstriction in horses.
Publication TypeJournal Article
Year of Publication2006
AuthorsDavis MS, Royer CM, McKenzie EC, Williamson KK, Payton M, Marlin D
JournalEquine veterinary journal. Supplement
Date Published2006 Aug
KeywordsAir, Animals, Bronchoconstriction, Cold Temperature, Cross-Over Studies, Exercise Test, Horse Diseases, Horses, Physical Conditioning, Animal, Respiratory Tract Diseases, Time Factors

Inspired air is warmed to body temperature and fully humidified by the upper airway mucosa under normal resting conditions. This conditioning process may not be completed by the upper airways during conditions of increased minute ventilation or when the inspired air is unusually cold, resulting in cooling and desiccation of lower respiratory surfaces. Excess heat and water loss from intrapulmonary airways is believed to be the provocative stimulus for exercise-induced bronchoconstriction (occurring immediately after exercise) and associated late phase airway obstruction (occurring a few hours after exercise).

Alternate JournalEquine Vet J Suppl