Abstract
BACKGROUND: Chronic rhinitis is a common condition generally treated with medical therapies. However, 10-22% of patients are refractory to medical therapies. A cryotherapy handheld device targeting the postganglionic nerve fibers of the posterior nasal nerve (PNN) now serves as an additional option for therapy. This study evaluates the efficacy of the cryosurgical ablation device of the PNN in the clinic setting. METHODS: This was a prospective single-arm trial of 24 adult patients at seven locations within a large health maintenance organization. Patients with chronic rhinitis that failed medical therapy were offered an in-office cryoablation of PNN. Patients completed the Total Nasal Symptom Score (TNSS) questionnaire consisting of 5 items reported based on the previous 12 hours and 2 weeks at the following time points: pre-treatment, 30 days, 90 days and 1 year post-treatment. RESULTS: Following cryoablation of the PNN, the TNSS 12-hour symptom score improved from 6.92 (±2.9) to 3.17 (±2.4, P < 0.001) at 30 days, 2.92 (±1.4, P < 0.001) at 90 days and 3.08 (±2.6, P < 0.001) at 1 year post treatment. Similar results were noted for the 2 weeks scores improving from 7.75 (±3.1) to 3.79 (±2.1, P < 0.001) at 30 days, 3.88 (±1.9, P < 0.001) at 90 days and 3.76 (±2.1, P < 0.001) at 1 year post-treatment. 64.7% of respondents stated the procedure decreased or eliminated nasal sprays. CONCLUSIONS: Our independent evaluation of cryoablation of the PNN shows improvement in nasal symptoms over a 1 year period and is consistent with other published data.