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Xen Gel Stent to Resolve Late Hypotony After Glaucoma Drainage Implant Surgery: A Novel Technique.
Journal of Glaucoma 2018 October
PURPOSE: To describe a new surgical method for treating late profound hypotony in 2 patients with glaucoma drainage implant (GDI).
PATIENTS AND METHODS: Two patients, an 85-year-old woman and a 44-year-old woman, presented with choroidal effusions secondary related to chronic hypotony after GDI surgery. A novel technique was performed in both cases to narrow the lumen size of the GDI tube. The GDI tube was exposed and ligated temporarily with a polyglactin suture in both cases. The anterior part of the capsule wall was opened. The Xen stent was removed from its injector and pushed through the posterior orifice of the GDI tube. The whole Xen stent was inserted inside the tube to narrow the lumen size of the GDI tube. Once the Xen had been placed inside the tube lumen, a silk suture was tied around the GDI tube to secure the Xen in position. The ligation suture of the GDI tube was removed and suturing of the conjunctiva was performed.
RESULTS: Before restriction of aqueous flow through the GDI, both patients had an intraocular pressure (IOP) of 2 mm Hg and blurry vison of 20/40 to 20/200. Following the Xen implant insertion, IOP ranged between 8 and 20 mm Hg and choroidal effusions resolved, and visual acuity improved. In both cases, IOP remained stable through 1 year of follow-up and no choroidal effusions or macular folds were noticed.
CONCLUSIONS: A Xen implant placed inside the GDI tube offers an option for the treatment of chronic hypotony in eyes with GDI.
PATIENTS AND METHODS: Two patients, an 85-year-old woman and a 44-year-old woman, presented with choroidal effusions secondary related to chronic hypotony after GDI surgery. A novel technique was performed in both cases to narrow the lumen size of the GDI tube. The GDI tube was exposed and ligated temporarily with a polyglactin suture in both cases. The anterior part of the capsule wall was opened. The Xen stent was removed from its injector and pushed through the posterior orifice of the GDI tube. The whole Xen stent was inserted inside the tube to narrow the lumen size of the GDI tube. Once the Xen had been placed inside the tube lumen, a silk suture was tied around the GDI tube to secure the Xen in position. The ligation suture of the GDI tube was removed and suturing of the conjunctiva was performed.
RESULTS: Before restriction of aqueous flow through the GDI, both patients had an intraocular pressure (IOP) of 2 mm Hg and blurry vison of 20/40 to 20/200. Following the Xen implant insertion, IOP ranged between 8 and 20 mm Hg and choroidal effusions resolved, and visual acuity improved. In both cases, IOP remained stable through 1 year of follow-up and no choroidal effusions or macular folds were noticed.
CONCLUSIONS: A Xen implant placed inside the GDI tube offers an option for the treatment of chronic hypotony in eyes with GDI.
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