Synopsis: This 1-year prospective study demonstrated that the Tenon's layer reposition approach of trabeculectomy could achieve zero leakage rate, minimal rate of transient hypotony without compromising the surgical outcome.
Purpose: The purpose of this study was to investigate the effectiveness and safety of a Tenon's layer reposition approach of trabeculectomy.
Methods: A prospective, noncomparative case series of 30 eyes of 30 Chinese patients with mixed types of glaucoma who underwent fornix-based trabeculectomy combined with intraoperative mitomycin C application. During the conjunctival flap closure, the Tenons' layer was identified, separated, and anchored on to the sclera surface with 8/0 vicryl, followed by conjunctival closure with 10/0 nylon as a separate layer. All patients were followed up for 1 year. Assessment including intraocular pressure (IOP), vertical cup-disc ratio measurement, best-corrected visual acuity, and visual field examination were performed before and after the operation. Qualified and complete success was defined as IOP of ≤21 mm Hg in 2 consecutive visits with or without medication, respectively. Outcomes were evaluated using scattered plot and Kaplan-Meier survival curve.
Results: Twenty-one eyes (70%) and 28 eyes (93.3%) achieved complete and partial success at 1 year, respectively. There was a significant reduction of IOP (28.5±9.6 to 15.5±2.6 mm Hg, P<0.001) and medication use (4.4±0.9 to 0.8±1.2 bottles/eye, P<0.001). There were no significant changes in best-corrected visual acuity, vertical cup-disc ratio, and visual field indices. No wound leak was identified throughout the study. The procedure did not induce significant astigmatic change. Other postoperative complications, including 2 eyes (6.7%) with transient hypotony and 1 eye (3.3%) required cataract surgery, were of relatively low rate.
Conclusion: The Tenon's layer reposition approach of performing trabeculectomy is a safe and efficacious procedure for Chinese subjects with different types of glaucoma.
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