Nilsen AH, et al. - Experts compared the nasal geometry and function using acoustic rhinometry and peak nasal inspiratory flow (PNIF) in 3 patients groups undergoing surgery for nasal obstruction. They also gauged if the improvement in minimal cross-sectional area (MCA) and nasal-cavity volume (NCV) occurred in different cavity areas in the groups. Moreover, the correlation between the objective measurements and the patients’ assessment of nasal obstruction (SNO) was also evaluated. In all groups, MCA and NCV were seen to improve with surgery. In different areas of the nasal cavity, an improvement was noted. In the septoplasty groups, authors noted an increase in both anterior and posterior areas, while in the RFIT group only the posterior area increased. The improvement in PNIF in all three patient groups suggested that an improvement in nasal patency was produced with surgery.