One Year Outcomes of Preserflo Microshunt for Primary Open Angle Glaucoma: A Systematic Review and Meta-analysis.

PRCIS:This systematic review and meta-analysis concludes that the PreserFlo Microshunt glaucoma drainage device significantly reduces intraocular pressure in primary open-angle glaucoma patients at 12 months post insertion. PURPOSE:A systematic review and meta-analysis on the effect of the PRESERFLO™ MicroShunt (PF-MS) on intraocular pressure (IOP) at 12 months has been conducted. METHOD:The Pubmed/MEDLINE, Embase, CENTRAL, Google Scholar, Scopus and Web of Science databases were searched. Inclusion criteria required a diagnosis of open-angle glaucoma, PF-MS insertion, and examination of IOP over time. Meta-analyses were conducted on the primary outcome of IOP and the secondary outcome of glaucoma medication regime. Adverse events were also noted. RESULTS:Fourteen studies were identified for inclusion in the meta-analyses, of which none had a high risk of bias. The meta-analyses found a significant mean reduction in IOP of 9.07 mmHg (95% CI 7.88 - 10.25; P<0.0001) and a significant mean reduction in mean glaucoma medication requirement of 2.37 medications (95% CI 2.15 - 2.60); P<0.0001). Hypotony and hyphaema are common early complications. CONCLUSIONS:The PF-MS device significantly reduced both IOP and glaucoma medication requirement at 12 months post insertion in individuals with open-angle glaucoma without a significant adverse event burden. Further research is required to determine the economic and environmental effects of widely implementing the PF-MS device into clinical practice.