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Initial clinical experience with the Ahmed Glaucoma Valve implant
A L Coleman1, R Hill, M R Wilson
1Jules Stein Eye Institute, UCLA School of Medicine 90024-7004, USA.
American Journal of Ophthalmology
|July 1, 1995
Summary
The Ahmed Glaucoma Valve implant shows a 78% success rate in lowering intraocular pressure for glaucoma patients. This aqueous shunting device may have fewer overfiltration complications than other valved implants.
Area of Science:
- Ophthalmology
- Glaucoma Management
- Surgical Devices
Background:
- Intractable glaucoma requires effective intraocular pressure (IOP) lowering.
- Traditional treatments may fail, necessitating surgical intervention.
- Aqueous shunting devices aim to reduce IOP and prevent hypotony.
Purpose of the Study:
- To evaluate the efficacy and safety of the Ahmed Glaucoma Valve implant.
- To assess the implant's ability to prevent postoperative hypotony.
- To determine the 12-month success rate of the Ahmed Glaucoma Valve in patients with refractory glaucoma.
Main Methods:
- A prospective, multicenter clinical trial involving 60 eyes (60 patients).
- Inclusion criteria: glaucoma unresponsive to medical, laser, or prior surgical treatments.
- Ahmed Glaucoma Valve implantation to reduce IOP.
Main Results:
- The cumulative probability of success at 12 months was 78%.
- Success defined as IOP between 5-21 mm Hg for ≥2 months, with ≥20% IOP reduction.
- Complications included choroidal detachments (22%), tube blockage (10%), and malposition (7%).
Conclusions:
- The Ahmed Glaucoma Valve demonstrates comparable 12-month success rates to other glaucoma drainage devices.
- It may present a lower risk of immediate postoperative overfiltration compared to other valved devices.
- Further randomized trials are needed for direct clinical comparisons with alternative glaucoma drainage devices.