[Geometry and function of the dog nose: how does function change when form of the nose is changed?].

Nasal airflow resistance in brachycephalic dogs is significantly elevated compared to normal dogs. LaserAssisted TurbinEctomy (LATE)-surgery as well as xylometazolin were shown to reduce pathologically increased intranasal airway resistance in brachycephalic dogs by approximately 50 %. Impulse oscillometry provides a reliable and sensitive method to examine intranasal stenoses in the canine nose. Acoustic rhinometry allows assessment of changes in cross sectional area and volume of the canine nasal cavity.