The nasal airway serves as the primary conduit for 20 inspired air to reach the lower respiratory tract. 21 Different anatomic factors may contribute to the 22 subjective sensation of decreased nasal airflow. It is 23 difficult to assess the relative importance of individual 24 factors contributing to nasal obstruction and to decide 25 on the therapy most likely to be effective in restoring 26 satisfactory nasal breathing [1]. The internal nasal valve 27 constitutes the bottle neck of the nose. It is responsible 28 for almost half of the total airway resistance [2]. 29 30 Nasal breathing impairment occurs if the nasal valve area 30 is constricted by any pathology such as hypertrophy of 32 the inferior turbinate, septal deviations, bony 33 constrictions of the pyriform aperture, anatomic 34 variations of the cartilaginous lateral nasal wall, or 35 scarred stenosis of the nasal valve [3].