Pars plana insertion of glaucoma drainage devices for refractory glaucoma

Area of Science:

• Ophthalmology
• Glaucoma Surgery
• Ocular Implants

Background:

• Anterior chamber glaucoma drainage device insertion is common due to ease.
• Posterior tube placement may be necessary or preferable in specific glaucoma cases.
• This study evaluates the outcomes of pars plana glaucoma drainage device implantation.

Purpose of the Study:

• To assess the efficacy and safety of pars plana glaucoma drainage device implantation.
• To determine the success rates and complications associated with this surgical approach.
• To compare outcomes with traditional anterior chamber placements.

Main Methods:

• Retrospective chart review of 33 patients undergoing pars plana implantation of Molteno and Baerveldt glaucoma drainage devices.
• Data collected included preoperative and postoperative intraocular pressure and medication usage.
• Kaplan-Meier survival analysis was used to predict cumulative success.

Main Results:

• Mean intraocular pressure reduced from 33.06 mmHg to 13.4 mmHg.
• Mean medication use decreased from 3.6 to 0.6 drugs.
• Success rates were 48.5% complete, 42.4% qualified, with 9% failure; 61.1% predicted survival at 60 months.
• Complications included corneal decompensation, wound dehiscence, choroidal effusion, epiretinal membrane, plate extrusion, and tube blockage.

Conclusions:

• Pars plana glaucoma drainage device insertion is an effective alternative for selected glaucoma patients.
• This method is particularly useful when anterior chamber tube insertion is not feasible or optimal.
• The procedure demonstrates significant intraocular pressure reduction and medication decrease.