Author Affiliations: Department of Otolaryngology and Communication Sciences, Medical College of Wisconsin, Milwaukee (Dr Rhee); and Department of Otolaryngology/Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill (Dr Kimbell).
In its simplest anatomical definition, the nasal cavity may be viewed as a longitudinal set of cross-sectional area segments that act as resistors in series, with the overall resistance being dominated by a single flow-limiting region with the least cross-sectional area, ie, the narrowest segment of the “straw.” A great deal of attention has been placed on identification of this resistive segment. This is the region of the nasal valve—internal, external, and the area in between.
Rhee JS, Kimbell JS. The Nasal Valve DilemmaThe Narrow Straw vs the Weak Wall. Arch Facial Plast Surg. 2012;14(1):9-10. doi:10.1001/archfacial.2011.1450