Blood Gas Tensions, Acid-base Status, Heart Rates, and Venous Profiles in Exercising Horses with Laryngeal Hemiplegia Before and After Corrective Surgery |
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| Authors: | L P TATE vmd Diplomate acvs W T CORBETT vmd PhD B J BISHOP vmd J H FOREMAN dvm MS |
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| Institution: | Departments of Food Animal and Equine Medicine (Tate), and Microbiology, Pathology, and Parasitology (Corbett), North Carolina State University, College of Veterinary Medicine, Raleigh, Sport Horse Associates (Bishop), Carthage, North Carolina, and the University of Illinois, College of Veterinary Medicine (Foreman), Urbana, Illinois. |
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| Abstract: | The physiologic effects of exercise were studied in four horses with complete laryngeal hemiplegia. Right carotid arteries were surgically elevated to a subcutaneous position for percutaneous catheterization. Each horse was fitted with a device designed to obtain multiple arterial samples while the horse was exercised over a 1.6-km course. After each horse completed 10 test gallops, the laryngeal hemiplegia was treated using a laryngeal prothesis and ventriculectomy. The horses were then reconditioned, and the exercise test and sampling were repeated. Horses with laryngeal hemiplegia became acidotic, hypoxic, and hypercapnic compared to normal horses. Surgical treatment improved blood gas and acid-base status, but the values were not equivalent to those in normal horses similarly tested. |
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