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Ahmed glaucoma valve implantation for secondary glaucoma post-vitrectomy
Sevgi Subasi1, Nursen Yuksel2, Veysel L Karabas2
1Medical Faculty Department of Ophthalmology, Kocaeli University, İzmit, Kocaeli, Turkey. sevgiozel_5@hotmail.com.
International Ophthalmology
|October 5, 2021
Summary
Ahmed Glaucoma Valve (AGV) implantation effectively lowers intraocular pressure (IOP) after pars plana vitrectomy (PPV). This safe surgical method shows good success rates for secondary glaucoma, with faster timing for neovascular glaucoma cases.
Area of Science:
- Ophthalmology
- Glaucoma Surgery
- Retinal Surgery
Background:
- Secondary glaucoma is a common complication following pars plana vitrectomy (PPV).
- Ahmed Glaucoma Valve (AGV) implantation is a recognized surgical option for managing post-vitrectomy glaucoma.
Purpose of the Study:
- To evaluate the 1-year outcomes of AGV implantation in patients who previously underwent PPV.
- To compare the efficacy and safety of AGV implantation in neovascular glaucoma (NVG) versus non-NVG secondary glaucoma post-PPV.
Main Methods:
- A retrospective study included 26 patients with secondary glaucoma after PPV who received AGV implantation.
- Patients were divided into two groups: NVG (14 patients) and non-NVG (12 patients).
- Outcomes assessed included intraocular pressure (IOP) reduction, medication use, surgical success rates, failure rates, and complications.
Main Results:
- Mean preoperative IOP was 29.54 mmHg, reduced to 12.88 mmHg at 12 months post-AGV implantation.
- No significant IOP difference was observed between NVG and non-NVG groups postoperatively.
- Complete and qualified surgical success rates were high (75-91.7%), with no devastating complications reported. Improvement in best-corrected visual acuity (BCVA) was seen in 91.7% of patients.
Conclusions:
- AGV implantation is a safe and effective surgical intervention for uncontrolled IOP after PPV.
- Surgical success and failure rates were comparable between NVG and non-NVG etiologies.
- AGV implantation was performed significantly sooner after PPV in the NVG group compared to the non-NVG group.
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