Treatment outcomes in the tube versus trabeculectomy (TVT) study after five years of follow-up

Steven J. Gedde, Joyce C. Schiffman, William J. Feuer, Leon W. Herndon, James D Brandt, Donald L. Budenz

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466 Scopus citations

Abstract

Purpose: To report 5-year treatment outcomes in the Tube Versus Trabeculectomy (TVT) Study. Design: Multicenter randomized clinical trial. Methods: Settings: Seventeen clinical centers. Study population: Patients 18 to 85 years of age who had previous trabeculectomy and/or cataract extraction with intraocular lens implantation and uncontrolled glaucoma with intraocular pressure (IOP) <18 mm Hg and ≤40 mm Hg on maximum tolerated medical therapy. Interventions: Tube shunt (350-mm 2 Baerveldt glaucoma implant) or trabeculectomy with mitomycin C ([MMC]; 0.4 mg/mL for 4 minutes). Main outcome measures: IOP, visual acuity, use of supplemental medical therapy, and failure (IOP >21 mm Hg or not reduced by 20%, IOP ≤5 mm Hg, reoperation for glaucoma, or loss of light perception vision). Results: A total of 212 eyes of 212 patients were enrolled, including 107 in the tube group and 105 in the trabeculectomy group. At 5 years, IOP (mean ± SD) was 14.4 ± 6.9 mm Hg in the tube group and 12.6 ± 5.9 mm Hg in the trabeculectomy group (P =.12). The number of glaucoma medications (mean ± SD) was 1.4 ± 1.3 in the tube group and 1.2 ± 1.5 in the trabeculectomy group (P =.23). The cumulative probability of failure during 5 years of follow-up was 29.8% in the tube group and 46.9% in the trabeculectomy group (P =.002; hazard ratio = 2.15; 95% confidence interval = 1.30 to 3.56). The rate of reoperation for glaucoma was 9% in the tube group and 29% in the trabeculectomy group (P =.025). Conclusions: Tube shunt surgery had a higher success rate compared to trabeculectomy with MMC during 5 years of follow-up in the TVT Study. Both procedures were associated with similar IOP reduction and use of supplemental medical therapy at 5 years. Additional glaucoma surgery was needed more frequently after trabeculectomy with MMC than tube shunt placement.

Original languageEnglish (US)
JournalAmerican Journal of Ophthalmology
Volume153
Issue number5
DOIs
StatePublished - May 2012

ASJC Scopus subject areas

  • Ophthalmology

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