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  • Title: The Ex-PRESS glaucoma shunt versus trabeculectomy in open-angle glaucoma: a prospective randomized study.
    Author: de Jong LA.
    Journal: Adv Ther; 2009 Mar; 26(3):336-45. PubMed ID: 19337705.
    Abstract:
    INTRODUCTION: The purpose of this study was to establish the efficacy and safety of the Ex-PRESS (Optonol Ltd., Neve Ilan, Israel) mini glaucoma shunt in open-angle glaucoma. METHODS: This was a prospective, randomized trial. Eyes from enrolled patients were randomly assigned to either Ex-PRESS implantation under a scleral flap, or trabeculectomy. The main outcome measures were: mean intraocular pressure (IOP), postoperative medication use, visual acuity, and incidence of complications. Complete success was defined as an IOP of >4 mmHg and <or=18 mmHg without the use of antiglaucoma medications. A more stringent target of IOP >4 mmHg and <or=15 mmHg was also noted. RESULTS: There were 78 patients (80 eyes) with primary open-angle, pseudoexfoliative, or pigmentary glaucoma enrolled in the study. A total of 84.6% of patients receiving Ex-PRESS and 60.0% of patients receiving trabeculectomy (P=0.0230) achieved complete success. The respective proportions of patients achieving an IOP >4 mmHg and <or=15 mmHg were 76.9% and 50.0% (P=0.0193). At 1-year follow-up, complete success rates were 81.8% for Ex-PRESS and 47.5% for trabeculectomy (P=0.0020), and 71.7% and 37.5% (P=0.0070), respectively, for the more stringent target. There was a similar level of postoperative interventions and complications for each group. CONCLUSIONS: In open-angle glaucoma, the Ex-PRESS mini glaucoma shunt implanted under a superficial scleral flap produces significantly higher success rates, and a similar complication rate, compared with trabeculectomy. The Ex-PRESS is a safe and effective device for treating open-angle glaucoma.
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