Computer-controlled Rebreathing System for Equine Exercise Testing

Exercise-induced pulmonary hemorrhage (EIPH) occurs in many race horses after maximal exercise. Because of its widespread occurrence, it is considered one of the most important issues in horse racing today. Recent modeling results have shown that low alveolar pressure and high airway resistance can possibly induce EIPH. To investigate these results physically, a system capable of altering inhaled gas densities and thus the airways’ resistance was needed.