Functional rhinoplasty: treatment of the dysfunctional nasal sidewall.

Treatment of nasal obstruction caused by nasal valve dysfunction requires a thorough evaluation of the mechanics of normal nasal anatomy and function. Surgical correction of nasal valve dysfunction is based on determining the epicenter of dysfunction, whether it is a static obstruction of the internal nasal valve or a dynamic collapse of either the external nasal valve or the intervalve area. Spreader grafts, flaring sutures, and butterfly grafts are used to widen and support the narrow internal nasal valve. Alar batten grafts will add support to the collapsing nasal sidewall seen in external nasal valve and intervalve dysfunction. Correction of dynamic collapse from paradoxical concavity of the lateral crura may be obtained from the lateral crural flip-flop graft or by reconstructing the lateral crura using cartilage grafts. A strut graft may correct dynamic obstruction caused by a malformed, easily collapsible lateral crura. This article discusses the evaluation, treatment, and correction of the dysfunctional nasal sidewall and emphasizes the avoidance of iatrogenic damage to the sidewall while performing cosmetic rhinoplasty.