Original ArticlesIntermediate-term clinical experience with the Ahmed Glaucoma Valve implant 1☆,
Section snippets
Patients and methods
We reviewed the records of patients who were treated with the Ahmed Glaucoma Valve implant for increased intraocular pressure or glaucoma that was not responsive to medical treatment, laser treatment, or previous glaucoma surgery. A total of 144 patients (159 eyes) were included from four medical centers in the United States. Patients with less than 4 months of follow-up were excluded from the analysis.
After informed written consent was obtained, the Ahmed Glaucoma Valve was implanted by one of
Results
The characteristics of the patients in the study are summarized in Table 1. A total of 159 eyes in 144 consecutive patients were included during the study period, from July 1992 to June 1996. The mean ± SEM follow-up period was 13.4 ± 0.7 months (range, 4 to 44 months). The mean ± SEM age was 60.9 ± 1.9 years (range, 0.1 to 103 years). The majority of eyes were pseudophakic (96 eyes, 61%) at the time of surgery. The most common diagnoses were open-angle glaucoma (55 eyes, 35%), glaucoma
Discussion
A variety of aqueous drainage implants have been developed to treat recalcitrant glaucomas, including open-tube and valved designs.1, 2 The Ahmed Glaucoma Valve implant has a 185-mm2 polypropylene body, which is larger than the single-plate Molteno implant and smaller than the Baerveldt implant. Its tapered chamber valve is designed to provide resistance to aqueous flow. We found transient postoperative hypotony in only 13 (8%) of 159 eyes treated with the this implant, and none required
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Supported in part by Research to Prevent Blindness, Inc, New York, New York.
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The authors have no proprietary interest in the Ahmed Glaucoma Valve implant.