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Intermediate-term outcome of variable dose mitomycin C filtering surgery

J C Cheung1, M M Wright, S Murali

  • 1Department of Ophthalmology, University of Minnesota, Minneapolis 55455, USA.

Ophthalmology
|January 1, 1997
PubMed
Summary
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Trabeculectomy with mitomycin C (MMC) effectively lowers intraocular pressure (IOP) for up to three years. This glaucoma surgery demonstrates sustained IOP reduction and high survival rates in the intermediate term.

Area of Science:

  • Ophthalmology
  • Surgical Innovation
  • Glaucoma Research

Background:

  • Trabeculectomy with mitomycin C (MMC) is a common glaucoma surgery.
  • Short-term studies show high success rates for MMC trabeculectomy.
  • Long-term outcomes beyond one year require further investigation.

Purpose of the Study:

  • To evaluate the intermediate-term (1-3 years) visual and intraocular pressure (IOP) outcomes of trabeculectomy with adjunctive mitomycin C.
  • To assess the sustained efficacy of MMC trabeculectomy in a predominantly white patient population.

Main Methods:

  • Retrospective review of 157 patients (157 eyes) aged 18+ who underwent MMC trabeculectomy for uncontrolled glaucoma.
  • MMC concentrations ranged from 0.2 to 0.5 mg/ml, applied for 30 seconds to 5 minutes.

Related Experiment Videos

  • Analysis included eyes at high risk for failure and those with specific preoperative IOP levels.

    • Main Results:

    • Mean preoperative IOP of 29.4 mmHg decreased to 13.0 mmHg at 1 year, 11.5 mmHg at 2 years, and 13.4 mmHg at 3 years.
    • Cumulative survival rates (defined as no reoperation for IOP control) were 94.2% at 1 year, 92.1% at 2 years, and 88.7% at 3 years.
    • Complications included cataract progression (31 eyes), hyphema (26 eyes), and choroidal detachment (21 eyes).

    Conclusions:

    • Mitomycin C filtering surgery provides sustained intraocular pressure reduction in the intermediate term (1-3 years).
    • The surgical procedure demonstrates a favorable safety and efficacy profile for managing uncontrolled glaucoma over this period.