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475 results on '"Sugiyama, Tetsuya"'

103. A case of Alagille syndrome complicated by intraocular lens subluxation and rhegmatogenous retinal detachment

Author

Fukumoto,Masanori, Ikeda,Tsunehiko, Sugiyama,Tetsuya, Ueki,Mari, Sato,Takaki, Isizaki,Eisuke, Fukumoto,Masanori, Ikeda,Tsunehiko, Sugiyama,Tetsuya, Ueki,Mari, Sato,Takaki, and Isizaki,Eisuke

Abstract

Masanori Fukumoto, Tsunehiko Ikeda, Tetsuya Sugiyama, Mari Ueki, Takaki Sato, Eisuke Ishizaki Department of Ophthalmology, Osaka Medical College, Takatsuki City, Japan Abstract: This case report describes a case of Alagille syndrome with developing intraocular lens subluxation and rhegmatogenous retinal detachment 4 years after cataract surgery. A 15-year-old female patient with Alagille syndrome-associated cataracts in both eyes underwent phacoemulsification aspiration and intraocular lens implantation. Four years postoperative, intraocular lens subluxation developed in her left eye. For treatment, extraction of the dislocated intraocular lens, anterior vitrectomy, and intraocular lens fixation was performed. Three weeks later, the patient developed rhegmatogenous retinal detachment, which was well-treated by pars plana vitrectomy. Cataract surgery needs to be performed carefully in patients with Alagille syndrome due to the weakness of the zonule of Zinn. Careful postoperative observation is necessary for patients with Alagille syndrome who have undergone intraocular surgery in order to facilitate early detection of a possible rhegmatogenous retinal detachment. Keywords: Alagille syndrome, cataract, retina, surgery

Published
2013

104. A case involving an Ahmed™ glaucoma valve transferred from the vitreous into the anterior chamber of the eye with a silicone oil tamponade for the treatment of neovascular glaucoma

Author

Miki,Michiko, Ueki,Mari, Sugiyama,Tetsuya, Kojima,Shota, Ikeda,Tsunehiko, Miki,Michiko, Ueki,Mari, Sugiyama,Tetsuya, Kojima,Shota, and Ikeda,Tsunehiko

Abstract

Michiko Miki, Mari Ueki, Tetsuya Sugiyama, Shota Kojima, Tsunehiko IkedaDepartment of Ophthalmology, Osaka Medical College, Takatsuki, JapanPurpose: To report the short-term efficacy and safety of the transfer of an Ahmed™ glaucoma valve (AGV™) tube from the vitreous into the anterior chamber, in a patient with neovascular glaucoma who had undergone pars plana AGV™ implantation and ultimately needed a silicone oil tamponade.Case: A 41-year-old male with proliferative diabetic retinopathy in both eyes was referred to us for treatment in December 2009. Although the patient previously underwent several surgeries, he ultimately lost vision in his right eye. His left eye suffered from neovascular glaucoma after undergoing a pars plana vitrectomy for tractional retinal detachment. After several vitreous and glaucoma surgeries, the patient underwent implantation of a pars plana AGV™. Postoperatively, although his intraocular pressure was stabilized at approximately 10 mmHg, he had repeated vitreous hemorrhage and hyphema without improvement. He ultimately underwent PPV with a silicone oil tamponade and at the same time, the AGV™ tube was pulled out from the vitreous and inserted into the anterior chamber in order to avoid complications caused by the silicone oil.Results: At 19 months postoperative, the patient’s intraocular pressure had stabilized at 10 mmHg with no recurrence of vitreous hemorrhage and hyphema. Eventually, he lost vision in his left eye because of cerebral hemorrhage.Conclusion: The findings show that insertion of a pars plana AGV™ tube into the anterior chamber in a patient undergoing a silicone oil tamponade is both effective and safe in the short-term.Keyword: tube implantation, glaucoma surgery, tube transfer, pars plana, proliferative diabetic retinopathy, intraocular pressure

Published
2013

106. The first report on intermediate-term outcome of Ex-PRESS® glaucoma filtration device implanted under scleral flap in Japanese patients

Author

Sugiyama,Tetsuya, Shibata,Maho, Kojima,Shota, Ueki,Mari, Ikeda,Tsunehiko, Sugiyama,Tetsuya, Shibata,Maho, Kojima,Shota, Ueki,Mari, and Ikeda,Tsunehiko

Abstract

Tetsuya Sugiyama, Maho Shibata, Shota Kojima, Mari Ueki, Tsunehiko IkedaDepartment of Ophthalmology, Osaka Medical College, Takatsuki, Osaka, JapanPurpose: This paper compares the outcomes of the Ex-PRESS® Glaucoma Filtration Device (Alcon, Fort Worth, TX) implant observed in Japanese patients for 1 year with those of patients undergoing trabeculectomy.Patients and methods: The subjects comprised ten eyes of ten cases with open-angle glaucoma for which filtration surgery using Ex-PRESS (P-50) was performed by one operator from February 2008 and observed for at least 1 year (Ex-PRESS Group), and eleven eyes of eleven cases for which trabeculectomy was performed by the same operator (TE Group). For both groups, mitomycin C was used and a scleral flap was created after a fornix-based incision of the conjunctiva.Results: Hypotony and choroidal detachment were observed as early postoperative complications during a 1-week period in one-third of the cases in the TE Group, and failing vision in about 45%, while these were seen in fewer cases in the Ex-PRESS Group. No significant difference in intraocular pressure (IOP) was observed during the period, but IOP variations on the day following the surgery were obviously narrower in the Ex-PRESS Group than in the TE Group. Visual acuity was significantly poorer from 1 week to 3 months in the TE Group while it was stable in the Ex-PRESS Group. The Ex-PRESS Group had fewer cases of laser suture lysis and fewer administrations of glaucoma eyedrop, and no cases of progression in the stage of visual field defect.Conclusion: Filtration surgery using the Ex-PRESS is unlikely to cause early complications in Japanese patients. Similarly to the trabeculectomy, the intermediate-term control of IOP showed favorable results.Keywords: Ex-PRESS, miniature glaucoma device, complication, efficacy, Japanese

Published
2011

107. Development of Continuous Fiber Flexible Reinforcement

Author

Yasuhiko Sato, Sugiyama Tetsuya, Akira Kobayashi, Tamon Ueda, Satoshi Kouzaki, and Saki Tomita

Subjects
Materials science, Bent molecular geometry, Fiber-reinforced concrete, computer.software_genre, law.invention, Load testing, law, Deflection (engineering), Ultimate tensile strength, Fiber bundle, Composite material, Reinforcement, computer, Stress concentration
Abstract

The authors have developed a continuous fiber flexible reinforcement (CFFR) which as good workability and can be used as a reinforcement in concrete. It consists of a plastic tube containing continuous fiber bundles and resin. The salient feature of this new material is that it can be easily formed at the construction site. The authors have conducted a study of fabrication methods of the material and an evaluation of its mechanical properties. This paper introduces the material and fabrication methods, and details the tensile strength of a member formed from this material. A member bent into a U shape was subjected to a load test to examine its basic properties. As a result, it was found that even when the material was bent, the applied tensile load was transmitted through it. Also, the load-deflection characteristic of the material and the stress concentration due to bending were influenced by the wall thickness of the plastic tube.

Published
1999

110. Intravitreal luxated lens stuck on the optic disc: a case report.

Author

Seita Morishita, Masanori Fukumoto, Hiroyuki Suzuki, Takaki Sato, Teruyo Kida, Eisuke Isizaki, Mari Ueki, Tetsuya Sugiyama, Tsunehiko Ikeda, Morishita, Seita, Fukumoto, Masanori, Suzuki, Hiroyuki, Sato, Takaki, Kida, Teruyo, Isizaki, Eisuke, Ueki, Mari, Sugiyama, Tetsuya, and Ikeda, Tsunehiko

Subjects
OPTIC disc, JAPANESE people, OLDER men, GLAUCOMA treatment, EYE cancer, VISUAL acuity, CANCER treatment, DISEASES, DISEASES in older people, ANGLE-closure glaucoma, APHAKIA, OPTIC nerve, VISION disorders, DISEASE complications
Abstract

Background: We encountered a rare patient with lens luxation in which the lens had become stuck on the optic disc. Findings obtained during vitreous surgery suggested that the luxated lens had become stuck on the optic disc via residual vitreous gel.Case Presentation: An 88-year-old Japanese man experienced lens luxation into the inferior vitreous cavity while undergoing treatment for glaucoma in his left eye. Because no inflammation was present upon examination, we observed the patient without prescribing any additional medications except for the eye drop treatment for glaucoma. Two years later, the patient revisited our clinic after suddenly noticing a visual disturbance in his left eye. A fundus examination revealed that the luxated lens had become stuck on the optic disc and displayed no changes in relation to the patient's head position or eye movement. Subsequently, vitreous surgery was performed to remove the luxated lens. During the surgery, we observed an aggregation of vitreous gel between the luxated lens and the optic disc. The luxated lens was successfully mobilized by pushing with a vitreous cutter and then extracted through a corneoscleral incision using perfluorocarbon liquid. At 4 months after surgery, the patient's visual acuity had improved to 20/25.Conclusions: The findings of this study suggest that the luxated lens had become stuck on the optic disc via residual vitreous gel on the optic disc. The surgical procedure of extracting the luxated lens through a corneoscleral incision using perfluorocarbon liquid was found to be both safe and effective. [ABSTRACT FROM AUTHOR]

Published
2016
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135. Involvement of Angiotensin II-Dependent Vascular Endothelial Growth Factor Gene Expression via NADPH Oxidase in the Retina in a Type 2 Diabetic Rat Model

Author

Fukumoto, Masanori, primary, Takai, Shinji, additional, Ishizaki, Eisuke, additional, Sugiyama, Tetsuya, additional, Oku, Hidehiro, additional, Jin, Denan, additional, Sakaguchi, Masato, additional, Sakonjo, Hiroshi, additional, Ikeda, Tsunehiko, additional, and Miyazaki, Mizuo, additional

Published
2008
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141. Effects of Chymase on the Macular Region in Monkeys and Porcine Müller Cells: Probable Involvement of Chymase in the Onset of Idiopathic Macular Holes

Author

Sugiyama, Tetsuya, primary, Katsumura, Kozo, additional, Nakamura, Kimitoshi, additional, Kobayashi, Masato, additional, Muramatsu, Michiko, additional, Maruichi, Midori, additional, Oku, Hidehiro, additional, Takai, Shinji, additional, Miyazaki, Mizuo, additional, and Ikeda, Tsunehiko, additional

Published
2006
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