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Site of mitomycin-C application during trabeculectomy.
J A Prata1, D S Minckler, G Baerveldt
1* Department of Ophthalmology University of Southern California School of Medicine, Doheny Eye Institute, Los Angeles, California, U.S.A. daggerDepartment of Ophthalmology, Escola Paulista de Medicina, São Paulo, Brazil.
Journal of Glaucoma
|November 19, 2009
Summary
Applying mitomycin-C after scleral flap dissection in trabeculectomy surgery significantly improves success rates for lowering intraocular pressure compared to applying it before flap dissection. This method offers better long-term outcomes for glaucoma patients.
Area of Science:
- Ophthalmology
- Surgical Innovation
- Glaucoma Research
Background:
- Trabeculectomy is a common glaucoma surgery.
- Mitomycin-C is used to enhance surgical success by preventing scar tissue formation.
- The timing of mitomycin-C application relative to scleral flap dissection is debated.
Purpose of the Study:
- To compare the outcomes of trabeculectomy with mitomycin-C applied episclerally (before flap dissection) versus in the scleral bed (after flap dissection).
- To evaluate the impact of mitomycin-C application timing on intraocular pressure control and surgical success.
Main Methods:
- Retrospective analysis of 82 patients (82 eyes) undergoing trabeculectomy with mitomycin-C.
- Patients were divided into two groups: episcleral mitomycin-C application (n=36) and scleral bed mitomycin-C application (n=46).
- Outcomes assessed included intraocular pressure, success rates (complete and qualified), and complications over a mean follow-up of approximately 10 months.
Main Results:
- The scleral bed group achieved significantly higher complete success rates (93.5%) compared to the episcleral group (50%).
- Cumulative survival and trabeculectomy survival rates were statistically higher in the scleral bed group (p=0.002 and p=0.0004, respectively).
- Final intraocular pressure was significantly lower in the scleral bed group (p=0.015), with no significant difference in complication rates.
Conclusions:
- Mitomycin-C application in the scleral bed after flap dissection is associated with superior intraocular pressure reduction and higher success rates in trabeculectomy.
- This surgical approach appears more effective than applying mitomycin-C episclerally before flap dissection.
- The findings suggest optimizing mitomycin-C delivery to the scleral bed enhances trabeculectomy efficacy.