Intraocular pressure control after the implantation of a second Ahmed glaucoma valve.

摘要

The objective of this study is to evaluate the efficacy and safety of a second Ahmed glaucoma valve (AGV) in eyes with refractory glaucoma that had undergone prior Ahmed device implantation. This multicenter, retrospective study evaluated 58 eyes (58 patients) that underwent a second AGV (model S2-n?=?50, model FP7-n?=?8) due to uncontrolled IOP under maximal medical therapy. Outcome measures included IOP, visual acuity, number of glaucoma medications, and postoperative complications. Success was defined as IOP <21?mmHg (criterion 1) or 30?% reduction of IOP (criterion 2) with or without hypotensive medications. Persistent hypotony (IOP <5?mmHg after 3?months of follow-up), loss of light perception, and reintervention for IOP control were defined as failure. Mean preoperative IOP and mean IOPs at 12 and 30?months were 27.55?±?1.16?mmHg (n?=?58), 14.45?±?0.83?mmHg (n?=?42), and 14.81?±?0.87?mmHg (n?=?16), respectively. The mean numbers of glaucoma medications preoperatively at 12 and 30?months were 3.17?±?0.16 (n?=?58), 1.81?±?0.2 (n?=?42), and 1.83?±?0.35 (n?=?18), respectively. The reductions in mean IOP and number of medications were statistically significant at all time intervals (P?