Original Article

Comparison of Clinical Results between Silicone and Polypropylene Ahmed Glaucoma Valves in End-stage Glaucoma - Original Article

  • Serdar Aktas
  • Semih Cilsim
  • Hatice Aktas
  • Kadir Eltutar

Received Date: 08.12.2007 Accepted Date: 08.07.2008 Turk J Ophthalmol 2008;38(5):381-388

Purpose: To compare the clinical results of silicone and polypropylene Ahmed glaucoma valves (AGVs). Materials-Methods: 22 eyes of 22 patients with medically uncontrolled terminal glaucoma were included in this prospective study which was done between March 2006 and October 2007. Patients were categorized into 2 groups. In the first group, polypropylene AGVs (model S2) (P-AGV group) were implanted to 11 eyes. In the second group, silicone AGVs (model FP7) (S-AGV group) were implanted to 11 eyes. Postoperative best corrected visual acuity (BCVA), intraocular pressure (IOP), antiglaucomatous medication and complications were evaluated. Results: Mean follow up was 12.1±3.1 months. Preoperative mean IOP was significantly decreased from 38 mm Hg to 16.33 mmHg in P-AGV group and 41.33 to 12 mm Hg in S-AGV group. In the S-AGV group antiglaucomatous medication was necessary for 1 patient (9.09%) to control IOP. On the other hand in the P-AGV group antiglaucomatous medication was necessary for 3 patients (27.27%) to control IOP. These differences in mean IOP and the number of antiglaucomatous medications were statistically significant (p0.05). In the first postoperative day there was shallow anterior chamber in 3 cases of SAGV (27.27%) and 2 cases of PAGV (18.18%). Anterior chamber was reformed with viscoelastic agents in these patients. Minimal hyphema was observed in 4 cases (36.36%) in each group. Fibrin membrane was seen in 1 case of SAGV group. Conclusion: In patients with terminal glaucoma; both polypropylene AGVs (model S2) and silicone AGVs (model FP7) are safe and effective methods. However the distribution of success rates of silicone AGVs were higher (p

Keywords: End-stage Glaucoma, Ahmed Glaucoma Valve, Seton Surgery

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