The Brachycephalic Airway Syndrome (BAS) is a well described combination of upper airway disorders in predisposed breeds. Reports on the difficulty in breathing of short-nosed breeds of dogs and therapeutic suggestions ascend into the thirties of thelast century. Symptoms can vary broadly as well in intensity as in frequency of dyspnoeic episodes. Snoring is the most common manifestation. As worst expression, severe dyspnoea with life-threatening asphyxia and syncope can be seen. Most authors focuson the same specific anatomic features if they want to characterize BAS and if they want to explain reasons for the respiratory problems-narrow nostrils, elongated soft palate and everted laryngeal ventricles. It is remarkable, that all these anatomicalstructures are located either rostrally or caudally to the nasal cavity itself.
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