Abstract
The suggested concept of rhinorespiratory homeostasis is a new theoretical model for
the discussion of physiologic and physical principles of nasal breathing. This model
is based on a comprehensive view of nasal functions that takes comparative animal
physiology into account. Consequently, it has a universal cross-species character
and emphasizes the central role of nasal secretion. In contrast to the established
view, the focus is transferred from the inspired air to the nasal wall. This concept
considers the parietal effect of airflow represented by wall shear stress with special
regard to the epithelial lining fluid. It delivers one possible mechanism of an inherent
triggering of the nasal cycle. Furthermore, the issue of biological fluid–structure
interaction is introduced. This article presents a rethinking of nasal breathing that
was inspired by clinical experience and results of flow field investigations through
computational fluid dynamics.
Keywords
nasal airflow - wall shear stress - nasal functions - nasal cycle - rhinorespiratory
homeostasis