[Simultaneous pars plana vitrectomy and glaucoma drainage device implant]

Area of Science:

• Ophthalmology
• Surgical Innovation
• Glaucoma Management

Background:

• Glaucoma drainage devices (GDDs) and pars plana vitrectomy (PPV) are established treatments for refractory glaucoma.
• Combining GDD implantation with PPV offers a potential surgical solution for complex glaucomatous conditions.

Purpose of the Study:

• To evaluate intraocular pressure (IOP) and visual acuity (VA) outcomes following simultaneous GDD implantation and PPV.
• To assess the safety and efficacy of this combined surgical approach in different types of glaucoma.

Main Methods:

• A retrospective review of 8 eyes (7 patients) undergoing combined GDD implantation and PPV.
• Patients included those with neovascular glaucoma (NVG) and secondary glaucoma (GS) from complicated cataract surgery or trauma.
• Two types of GDDs were used: Molteno implants for NVG and Ahmed valves for GS.

Main Results:

• Mean IOP decreased from 35.77 mmHg preoperatively to 11.5 mmHg postoperatively.
• The mean number of hypotensive medications decreased from 2.33 to 0.62.
• In GS, mean VA improved from <0.1 to 0.42 at 3 months. In NVG, visual outcomes were poor.
• Complications included tube obstruction, hemorrhage, ptisis bulbi, plate exposure, and bullous keratopathy.

Conclusions:

• Combined GDD implantation and PPV achieved good IOP control and improved VA in secondary glaucoma.
• While IOP was controlled in NVG, poor visual outcomes were attributed to underlying pathology and complications.
• This combined procedure demonstrates potential for managing complex glaucoma cases, with careful patient selection being crucial.