advertisement

---

1 General aspects (0)   1.1 Epidemiology (7)   1.2 Population genetics (2)   1.3 Pathogenesis (6)   1.4 Quality of life (5)   1.5 Glaucomas as cause of blindness (6)   1.6 Prevention and screening (4) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (8)   2.2 Cornea (18)   2.3 Sclera (3)   2.4 Anterior chamber angle (3)   2.5 Meshwork (0)     2.5.1 Trabecular meshwork (12)     2.5.2 Schlemms canal (3)     2.5.3 Scleral outlet channels (1)   2.6 Aqueous humor dynamics (0)     2.6.1 Production (5)     2.6.2 Outflow (3)       2.6.2.1 Trabecular meshwork (0)       2.6.2.2 Uveoscleral (0)     2.6.3 Compostion (7)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (3)   2.9 Ciliary body (1)   2.10 Lens (3)   2.11 Vitreous body (0)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (2)   2.13 Retina and retinal nerve fibre layer (25)   2.14 Optic disc (21)   2.15 Optic nerve (4)   2.16 Chiasma and retrochiasmal central nervous system (6)   2.17 Stem cells (3)   2.20 Other (0) 3 Laboratory methods (0)   3.1 Microscopy (3)   3.2 Electron microscopy (0)   3.3 Immunohistochemistry (2)   3.4 Molecular genetics (0)     3.4.1 Linkage studies (1)     3.4.2 Gene studies (31)   3.5 Molecular biology incl. SiRNA (24)   3.6 Cellular biology (24)   3.7 Biochemistry (11)   3.8 Pharmacology (9)   3.9 Pathophysiology (7)   3.10 Immunobiology (3)   3.11 Pharmacogenetics (0)   3.12 Proteomics (2)   3.13 In vivo imaging (0)     3.13.1 Laser Scanning (0)       3.13.1.1 Confocal Scanning Laser Ophthalmoscopy (0)       3.13.1.2 Confocal Scanning Laser Polarimetry (0)     3.13.2 Optical Coherence Tomography (0)       3.13.2.1 Anterior Segment (0)       3.13.2.2 Posterior Segment (0)     3.13.3 RGC Imaging (0)     3.13.4 Other (2)   3.20 Other (0) 4 Tissue culture of ocular cells (0) 5 Experimental glaucoma; animal models (0)   5.1 Rodent (27)   5.2 Primates (8)   5.3 Other (9) 6 Clinical examination methods (0)   6.1 Intraocular pressure measurement; factors affecting IOP (0)     6.1.1 Devices, techniques (18)     6.1.2 Fluctuation, circadian rhythms (8)     6.1.3 Factors affecting IOP (11)   6.2 Tonography, aqueous flow measurement (see also 2.6) (0)   6.3 Biomicroscopy (slitlamp) (0)     6.3.1 Anterior segment (0)     6.3.2 Posterior segment (0)   6.4 Gonioscopy (1)   6.5 Ophthalmoscopy (0)   6.6 Visual field examination and other visual function tests (1)     6.6.1 Conventional manual (1)     6.6.2 Automated (10)     6.6.3 Special methods (e.g. color, contrast, SWAP etc.) (7)   6.7 Electro-ophthalmodiagnosis (6)   6.8 Photography (0)     6.8.1 Anterior segment (3)     6.8.2 Posterior segment (6)   6.9 Computerized image analysis (0)     6.9.1 Laser scanning (0)       6.9.1.1 Confocal Scanning Laser Ophthalmoscopy (19)       6.9.1.2 Confocal Scanning Laser Polarimetry (5)     6.9.2 Optical coherence tomography (0)       6.9.2.1 Anterior (5)       6.9.2.2 Posterior (49)     6.9.5 Other (4)   6.10 Fluorescein (ICG) angiography (0)     6.10.1 Anterior segment (0)     6.10.2 Posterior segment (0)   6.11 Bloodflow measurements (17)   6.12 Ultrasonography and ultrasound biomicroscopy (2)   6.13 Provocative tests (3)   6.19 Telemedicine (0)   6.20 Progression (7)   6.30 Other (2) 8 Refractive errors in relation to glaucoma (0)   8.1 Myopia (5)   8.2 Hypermetropia (0)   8.3 Contact lenses (1)   8.4 Refractive surgical procedures (0)   8.5 Other (0) 9 Clinical forms of glaucomas (0)   9.1 Developmental glaucomas (0)     9.1.1 Congenital glaucoma, Buphthalmos (9)     9.1.2 Juvenile glaucoma (3)     9.1.3 Syndromes of Axenfeld, Rieger, Peters, aniridia (4)     9.1.4 Other (0)   9.2 Primary open angle glaucomas (0)     9.2.1 Ocular hypertension (0)     9.2.2 Other risk factors for glaucoma (7)     9.2.3 Open angle glaucoma with elevated IOP (1)     9.2.4 Normal pressure glaucoma (6)   9.3 Primary angle closure glaucomas (1)     9.3.1 Acute primary angle closure glaucoma (pupillary block) (5)     9.3.2 Chronic primary angle closure glaucoma (pupillary block) (1)     9.3.3 Plateau iris syndrome (1)     9.3.4 Primary angle closure suspect (2)     9.3.5 Primary angle closure (12)     9.3.10 Other (0)   9.4 Glaucomas associated with other ocular and systemic disorders (0)     9.4.1 Steroid-induced glaucoma (7)     9.4.2 Glaucomas associated with disorders of the cornea, conjunctiva, sclera (0)       9.4.2.1 Iridocorneal endothelial syndrome (ICE, incl. irisatrophy) (0)       9.4.2.2 Posterior polymorphous dystrophy (0)       9.4.2.3 Fuchs' endothelial dystrophy (1)       9.4.2.5 Other (0)     9.4.3 Glaucomas associated with disorders of the iris and ciliary body (0)       9.4.3.1 Pigmentary glaucoma (4)       9.4.3.5 Other (2)     9.4.4 Glaucomas associated with disorders of the lens (0)       9.4.4.1 Exfoliation syndrome (16)       9.4.4.2 Glaucomas associated with cataracts (3)       9.4.4.3 Glaucomas associated with lens dislocation (0)       9.4.4.5 Other (1)     9.4.5 Glaucomas associated with disorders of the retina, choroid and vitreous (0)       9.4.5.1 Neovascular glaucoma (9)       9.4.5.5 Other (5)     9.4.6 Glaucomas associated with inflammation, uveitis (2)     9.4.7 Glaucomas associated with ocular trauma (1)     9.4.8 Glaucomas associated with intraocular tumors (0)     9.4.9 Glaucomas associated with elevated episcleral venous pressure (0)       9.4.10 Glaucomas associated with hemorrhage (1)     9.4.11 Glaucomas following intraocular surgery (1)       9.4.11.1 Ciliary block (malignant) glaucoma (1)       9.4.11.2 Glaucomas in aphakia and pseudophakia (5)       9.4.11.3 Epithelial, fibrous, and endothelial proliferation (0)       9.4.11.4 Glaucomas associated with corneal surgery (4)       9.4.11.5 Glaucomas associated with vitreoretinal surgery (6)     9.4.15 Glaucoma in relation to systemic disease (30)     9.4.20 Other (0) 10 Differential diagnosis e.g. anterior and posterior ischemic optic neuropathy (11) 11 Medical treatment (0)   11.1 General management, indication (2)   11.2 Cholinergic drugs (1)   11.3 Adrenergic drugs (0)     11.3.1 Epinephrine (0)     11.3.2 Thymoxamine, dapiprazole (0)     11.3.3 Apraclonidine, brimonidine (4)     11.3.4 Betablocker (5)     11.3.5 Other (0)   11.4 Prostaglandins (20)   11.5 Carbonic anhydrase inhibitors (0)     11.5.1 Systemic (1)     11.5.2 Topical (3)   11.6 Osmotic treatment (0)   11.7 Treatment of bloodflow (0)   11.8 Neuroprotection (28)   11.9 Gene therapy (2)   11.13 Combination therapy (1)     11.13.1 Betablocker and pilocarpine (0)     11.13.2 Betablocker and carbon anhydrase inhibitor (5)     11.13.3 Betablocker and brimonidine (2)     11.13.4 Betablocker and prostaglandin (1)     11.13.5 Other (0)   11.14 Investigational drugs; pharmacological experiments (30)   11.15 Other drugs in relation to glaucoma (7)   11.16 Vehicles, delivery systems, pharmacokinetics, formulation (18)   11.17 Cooperation with medical therapy e.g. persistency, compliance, adherence (9)   11.20 Other (0) 12 Surgical treatment (0)   12.1 General management, indication (0)   12.2 Laser iridotomy (2)   12.3 Laser iridoplasty (0)   12.4 Laser trabeculoplasty and other laser treatment of the angle (4)   12.7 Surgical iridectomy (0)   12.8 Filtering surgery (0)     12.8.1 Without tube implant (4)     12.8.2 With tube implant or other drainage devices (19)     12.8.3 Non-perforating (5)     12.8.4 Using laser (0)     12.8.5 Other (0)     12.8.10 Woundhealing antifibrosis (9)     12.8.11 Complications, endophthalmitis (4)   12.9 Trabeculotomy, goniotomy (4)   12.10 Cyclodestruction (3)   12.11 Cyclodialysis (0)   12.12 Cataract extraction (0)     12.12.1 Intracapsular (0)     12.12.2 Extracapsular (0)     12.12.3 Phacoemulsification (3)   12.14 Combined cataract extraction and glaucoma surgery (1)     12.14.1 Intracapsular (0)     12.14.2 Extracapsular (0)     12.14.3 Phacoemulsification (6)   12.15 Capsulotomy (1)   12.16 Vitrectomy (0)   12.17 Anesthesia (2)   12.20 Other (1) 13 Therapeutic prognosis and outcome (0)   13.1 Prognostic factors (1)   13.2 Outcome (0)     13.2.1 IOP (1)     13.2.2 Visual field (0)       13.2.2.1 Progression (1)       13.2.2.2 Improvement (0)     13.2.3 Other (0) 14 Costing studies; pharmacoeconomics (3) 15 Miscellaneous (20)

---

Abstract #27828 Published in IGR 13-1

MRI of the Ex-PRESS stainless steel glaucoma drainage device

Seibold LK; Rorrer RAL; Kahook MY
British Journal of Ophthalmology 2011; 95: 251-254

---

Aim: To evaluate the magnetic properties of the Ex-PRESS stainless steel glaucoma drainage device during MRI. Design: Experimental study. Methods: The Ex-PRESS glaucoma drainage device (316L stainless steel) was examined for magnetic field interactions under standard 1.5, 3.0, and 4.7 T MRI scanning protocols. Testing included measurements of translational and rotational motion of the device induced by static magnetic fields. In addition, the change in the temperature of the device was measured to assess the presence of radiofrequency heating of the stainless steel device. Main outcome measures: Degree of angular deflection, device displacement and rotation, and change in temperature. Results: During induced torque testing, displacement did not occur under 1.5 and 3.0 T conditions, although a significant amount of displacement occurred in the 4.7 T environment. Increasing amounts of angular deflection were demonstrated at all three field strengths. We did not record significant temperature changes during brain MRI sequences at any of the three MRI strengths. Conclusions: The Ex-PRESS glaucoma drainage device, manufactured from grade 316L stainless steel, does move in the presence of high magnetic fields. The clinical significance of this finding and translation to in vivo conditions are not currently known. Further studies are needed to better understand how patients might be affected by the magnetic properties of this device post implantation and how patients should be counselled in regards to safety of MRI in the early and late postoperative period.

M. Y. Kahook. Department of Ophthalmology, Rocky Mountain Lions Eye Institute, University of Colorado at Denver, 1675 Aurora Court, Aurora, CO 80045, United States. malik.kahook@gmail.com

---

Classification:

12.8.2 With tube implant or other drainage devices (Part of: 12 Surgical treatment > 12.8 Filtering surgery)

---

• ← Previous
• Next →

---