ArticleJournal of glaucoma2025
One-Year Real-World Outcomes of Ab-Externo Gel Stent Placement From the EXPAND Study.
Article in Journal of glaucoma, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
PRÉCIS: In the real-world, retrospective, EXPAND study of consecutive adults with glaucoma, ab-externo gel stent implantation effectively lowered intraocular pressure (34%) and the medication burden (61%), with transient/self-resolving hypotony as the most frequent adverse event (28%). PURPOSE: To assess effectiveness and safety of ab-externo gel stent (GS) implantation in glaucoma.
methodsMulticenter, real-world, retrospective study. Consecutive adults with glaucoma and ab-externo GS implantation (with/without phacoemulsification or open/closed conjunctiva) ≥12 months before study entry. Data were extracted between the baseline/preoperative and last follow-up visit or date of secondary surgical intervention (SSI). Primary effectiveness endpoint: proportion of primary eyes (first eye in bilaterally implanted patients) at month 12 (M12) achieving ≥20% intraocular pressure (IOP) reduction from baseline without medication increase, clinical hypotony, vision loss to counting fingers, or SSI. Secondary effectiveness endpoints included complete success (IOP ≤18 mm Hg and ≥20% IOP reduction from medicated baseline without medication, clinical hypotony, or SSI); qualified success (same but without medication increase); and needling rate. Key safety endpoints (all eyes): intraoperative complications, postoperative adverse events (AEs), and SSIs.
resultsThe safety population included 466 eyes; 80.7% received the GS alone and 85.0% were implanted with closed conjunctiva. At M12, 39.1% of all primary eyes (N=413) and 54.9% of primary eyes with IOP and medication data at baseline and M12 (N=213) achieved the primary endpoint. At M12 among all primary eyes, the complete success, qualified success, and needling rates were 33.5%, 56.5%, and 28.6%. Most eyes (97.9%) had no intraoperative complications. The most frequent postoperative AE was transient/self-resolving hypotony (IOP <6 mm Hg; 28.1%). Sixty-nine (14.8%) eyes required an SSI.
conclusionsAb-externo GS placement effectively lowered IOP and the medication count without unexpected complications/AEs, expanding implantation options based on patients' needs and surgeons' preferences.
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