Efficacy of the Exhalation Delivery System With Fluticasone for Chronic Rhinosinusitis: A Systematic Review and Meta-Analysis

Objectives: Novel biomechanics of the exhalation delivery system can deliver fluticasone (EDS-FLU; XHANCE) to sinonasal areas above the inferior turbinate, especially sinus drainage pathways not reached by standard nasal sprays. This study aimed to evaluate the effectiveness of EDS-FLU in treating chronic rhinosinusitis (CRS).Methods: Studies were retrieved from PubMed, SCOPUS, Embase, Web of Science, and Cochrane databases up to April 2024. We analyzed 5 studies that compared EDS-FLU with a control group (exhalation delivery system with placebo) on various outcomes, including the 22-item Sinonasal Outcome Test (SNOT-22), nasal symptom scores (congestion, facial pain, olfactory dysfunction, and rhinorrhea), nasal polyp scores, surgical indication rate, and the incidence of adverse effects.Results: Five studies with 2129 patients were included. EDS-FLU significantly improved SNOT-22 score (-20.9657 [-23.5639; -18.3674]) and the polyp score (-1.5099 [-1.7810; -1.2388]) after 6 months. The incidence of epistaxis was significantly higher in the treatment group compared to the control group (OR = 5.7954 [2.1004; 15.9909]). Effects of EDS-FLU on polyp score (-0.6497 [-0.8186; -0.4807]), responder rate (OR = 2.1755 [1.2784; 3.7020]), complete responder rate (OR = 2.0423 [1.0109; 4.1262]), surgical indication rate (OR = 0.7313 [0.5459; 0.9797]), and SNOT-22 score (-6.1513 [-11.3054; -0.9972]) were significantly higher in the treatment group than in the control group.Conclusions: This study demonstrated that EDS-FLU (372 mu g twice daily) produced statistically significant improvements compared to EDS-placebo in multiple subjective and objective outcomes, although some adverse effects, such as epistaxis, may occur.