Clinical Evaluation of the Steroid-Eluting Sinexus Intranasal Splint When Used Following Functional Endoscopic Sinus Surgery (FESS) in Patients With Chronic Sinusitis

Inclusion Criteria: * Patient is 18 years of age or older * Patient has a diagnosis of chronic sinusitis * Patient has a clinical indication for and has consented to FESS * Patient CT scan confirms CS diagnosis within 6 months of procedure * CT sacn confirms presence of disease in ethmoid sinus(es) * Planned FESS includes unilateral or bilateral total ethmoidectomy Exclusion Criteria: * Immune deficiency (IGG subclass deficiency or IGA deficiency) * Oral-steroid dependent COPD, asthma or other condition * Clinical evidence of acute bacterial sinusitis * History or diagnosis of glaucoma or ocular hypertension * Clinical evidence or suspicion of invasive fungal sinusitis * Evidence of disease or condition expected to compromise survival or ability to complete follow-up * Known history of allergy or intolerance to corticosteroids * History of insulin dependent diabetes