Quantification of the Airflow Into Sinuses Before and After ArchSinus Implantation

Inclusion Criteria: * Male/female, 18 year or older * Diagnosis of chronic rhinosinusitis defined as symptomatic inflammation of the sinuses of at least 12 consecutive weeks duration despite medical management * ≥ 3 months post primary FESS * Symptoms of chronic rhinosinusitis defined as ≥ 10 score on SNOT-22 * Middle turbinate lateralization defined as ˃ 2 score on MT lateralization scale Exclusion Criteria: * Polyp grade ˃ 4 bilaterally on Lildholdt's scale (1-3) * Sinonasal tumors * Known allergy to nickel * Known polyurethane induced dermatitis * History of immune deficiency * Cystic fibrosis * Pregnant or lactating female * Acute sinus inflammation * Coagulation disorders