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1 General aspects (0)   1.1 Epidemiology (10)   1.2 Population genetics (0)   1.3 Pathogenesis (0)   1.4 Quality of life (5)   1.5 Glaucomas as cause of blindness (6)   1.6 Prevention and screening (5) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (7)   2.2 Cornea (15)   2.3 Sclera (4)   2.4 Anterior chamber angle (1)   2.5 Meshwork (0)     2.5.1 Trabecular meshwork (3)     2.5.2 Schlemms canal (0)     2.5.3 Scleral outlet channels (0)   2.6 Aqueous humor dynamics (0)     2.6.1 Production (0)     2.6.2 Outflow (2)       2.6.2.1 Trabecular meshwork (1)       2.6.2.2 Uveoscleral (0)     2.6.3 Compostion (4)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (0)   2.9 Ciliary body (1)   2.10 Lens (0)   2.11 Vitreous body (0)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (0)   2.13 Retina and retinal nerve fibre layer (14)   2.14 Optic disc (21)   2.15 Optic nerve (2)   2.16 Chiasma and retrochiasmal central nervous system (0)   2.17 Stem cells (1)   2.20 Other (0) 3 Laboratory methods (0)   3.1 Microscopy (0)   3.2 Electron microscopy (0)   3.3 Immunohistochemistry (1)   3.4 Molecular genetics (0)     3.4.1 Linkage studies (2)     3.4.2 Gene studies (19)   3.5 Molecular biology incl. 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(19)

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Abstract #24175 Published in IGR 11-3

Level of vascular endothelial growth factor in aqueous humor and surgical results of ahmed glaucoma valve implantation in patients with neovascular glaucoma

Kim YG; Hong S; Lee CS; Kang SY; Seong GJ; Ma KT; Kim CY
Journal of Glaucoma 2009; 18: 443-447

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PURPOSE: To determine the associations between the levels of growth factors in aqueous humor and the surgical outcomes of Ahmed glaucoma valve implantation in patients with neovascular glaucoma (NVG). METHODS: From 19 NVG eyes of 19 patients, a sample of aqueous humor was taken just before Ahmed glaucoma valve implantation. Levels of vascular endothelial growth factor (VEGF), transforming growth factor (TGF)-β1, and TGF-β2 in aqueous humor aspirates were measured using a sandwich enzyme-linked immunosorbent assay method. When the postoperative intraocular pressures were >or=21 mm Hg with or without antiglaucoma medications at 2 successive visits or when any other surgical interventions were needed to lower intraocular pressure, that surgery was considered a failure. After patients were classified into success versus failure groups, the levels of the growth factors between the 2 groups was compared. The cumulative probability of success according to Kaplan-Meier analysis was also determined. RESULTS: Mean postoperative follow-up period was 40.9+/-19.6 months and cumulative probability of success was 43% at 57 months after surgery. Mean VEGF level in the failure group was higher than that of the success group (P=0.014). However, there was no statistical difference in the levels of TGF-β1, TGF-β2, and protein between 2 study groups (all P>0.05). CONCLUSIONS: The level of VEGF in aqueous humor was significantly higher in the failure group after the Ahmed glaucoma implantation compared with the success group. Our results imply that VEGF may play a role in determining surgical success after Ahmed valve implantation in patients with NVG.

Dr. Y.G. Kim, Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seodaemun-gu, Seoul 120-752, Republic of Korea

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Classification:

9.4.5.1 Neovascular glaucoma (Part of: 9 Clinical forms of glaucomas > 9.4 Glaucomas associated with other ocular and systemic disorders > 9.4.5 Glaucomas associated with disorders of the retina, choroid and vitreous)
12.8.2 With tube implant or other drainage devices (Part of: 12 Surgical treatment > 12.8 Filtering surgery)
2.6.3 Compostion (Part of: 2 Anatomical structures in glaucoma > 2.6 Aqueous humor dynamics)

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