Abstract
BACKGROUND: Dynamic nasal valve collapse (NVC) is a common factor contributing to nasal obstruction; however, it is often underdiagnosed and untreated. An in-office, minimally invasive procedure addressing dynamic NVC uses a bioabsorbable implant (Latera) to support the lateral nasal wall. This study aimed to evaluate the safety and effectiveness of the treatment in a randomized controlled trial (RCT) with sham control. METHODS: In this prospective, multicenter, single-blinded RCT, 137 patients from 10 clinics were randomized into 2 arms: treatment arm (70 patients) and sham control arm (67 patients). Outcome measures were followed through 3 months after the procedure. The primary endpoint was the responder rate (percentage of patients with reduction in clinical severity by ≥1 category or ≥20% reduction in Nasal Obstruction Symptom Evaluation [NOSE] score). RESULTS: Before the procedure, there were no statistically significant differences in patient demographics and nasal obstruction symptom measures between the 2 arms. Three months after the procedure, responder rate was significantly higher for the treatment arm compared to the control (82.5% vs 54.7%, p = 0.001). Patients in the treatment arm also had a significantly greater decrease in NOSE score (-42.4 ± 23.4 vs -22.7 ± 27.9, p < 0.0001) and significantly lower visual analogue scale (VAS) scores (-39.0 ± 29.7 vs -13.3 ± 30.0, p < 0.0001) than the sham control arm. Seventeen patients reported 19 procedure/implant-related adverse events, all of which resolved with no clinical sequelae. CONCLUSION: Our study shows the safety and effectiveness of the bioabsorbable implant in reducing patients' nasal obstruction symptoms.