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  • Title: Trabeculectomy Tenon Advancement Technique May Reduce Bleb-Related Infections.
    Author: Mambo Y, Higashide T, Ohkubo S, Udagawa S, Yamashita Y, Tsuchiya S, Okayama M, Wajima R, Sugiyama K.
    Journal: J Glaucoma; 2023 Feb 01; 32(2):107-116. PubMed ID: 36223327.
    Abstract:
    PRCIS: Trabeculectomy using the Tenon advancement technique with a fornix-based (FB) conjunctival flap showed avascular bleb formation less frequently and had a significantly lower risk of developing bleb-related infections than trabeculectomy with a limbus-based conjunctival flap. PURPOSE: To determine whether the Tenon advancement technique for trabeculectomy with a FB conjunctival flap is effective in preventing bleb-related infections. MATERIALS AND METHODS: This was a single-center, nonrandomized retrospective cohort study of 998 eyes from 854 patients with glaucoma who underwent trabeculectomy with mitomycin C. Trabeculectomy procedures were categorized into 3 groups: limbus-based (LB, 296 eyes), FB without Tenon advancement (FBTA-, 167 eyes), and FB with Tenon advancement (FBTA+, 535 eyes). The cumulative incidence of bleb-related infections and the rate of surgical success during the 5-year postoperative follow-up period were analyzed using Kaplan-Meier survival analysis and Cox proportional hazards models. Intraocular pressure (IOP) reduction of <20% from baseline or additional glaucoma surgeries was deemed a surgical failure. Surgical success with or without IOP-lowering medications was evaluated according to different IOP criteria. RESULTS: Ten eyes developed bleb-related infections (8 eyes in the LB group and 1 eye in both the FBTA- and FBTA+ groups each). The cumulative probability of bleb-related infections in the LB, FBTA-, and FBTA+ groups was 4.8±1.7% (± standard error), 0.8±0.8%, and 0.3±0.3%, respectively. The FBTA+ group had a significantly lower risk of bleb-related infections than the LB group (hazard ratio, 0.06; 95% confidence interval, 0.01 to 0.39; P =0.009). The FBTA+ group did not have a higher risk of surgical failure. CONCLUSION: The Tenon advancement technique for trabeculectomy using an FB conjunctival flap may be effective in preventing bleb-related infections without compromising surgical success.
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