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Medical retina

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https://www.readbyqxmd.com/read/28225234/-renovascular-disease-in-children-a%C3%A2-rare-diagnosis-with-few-symptoms
#1
Hjørdis Thorsteinsdottir, Eric Dorenberg, Pål-Dag Line, Anna Bjerre
BACKGROUND To estimate the prevalence, symptoms, causes and treatment of renovascular disease in children, and also to assess the degree of secondary organ damage to the heart, kidneys and eyes (end organ damage).MATERIAL AND METHOD Retrospective review of data for all children (0 - 16 years) who were examined for resistant hypertension in the period 1998 - 2013 at Oslo University Hospital Rikshospitalet.RESULTS A total of 21 children/adolescents (median age 8.5 years, 11 girls) were assessed and treated for resistant hypertension in the study period...
February 2017: Tidsskrift for Den Norske Lægeforening: Tidsskrift for Praktisk Medicin, Ny Række
https://www.readbyqxmd.com/read/28221293/orbital-emphysema-as-a-rare-complication-of-retina-surgery
#2
Lourdes Rodríguez-Cabrera, José L Rodríguez-Loaiza, José L Tovilla-Canales, Francisca Zuazo
Three patients with a history of previous pars-plana vitrectomy, 2 of them with perfluoropropane, and 1 with sulfur hexafluoride used, experienced eyelid swelling and pain after travelling to a higher altitude city. Gas was found in the orbit and periocular tissues, causing orbital compartment syndrome in 2 of the patients. The gas persisted on these patients despite surgical intervention, so hyperbaric oxygen therapy was advised. One patient refused, the other patient responded well to this therapy and the gas disappeared...
February 17, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28220575/generation-of-storable-retinal-organoids-and-retinal-pigmented-epithelium-from-adherent-human-ips-cells-in-xeno-free-and-feeder-free-conditions
#3
Sacha Reichman, Amélie Slembrouck, Giuliana Gagliardi, Antoine Chaffiol, Angélique Terray, Céline Nanteau, Anais Potey, Morgane Belle, Oriane Rabesandratana, Jens Duebel, Gael Orieux, Emeline F Nandrot, José-Alain Sahel, Olivier Goureau
Human induced pluripotent stem cells (hiPSCs) are potentially useful in regenerative therapies for retinal disease. For medical applications, therapeutic retinal cells, such as retinal pigmented epithelial (RPE) cells or photoreceptor precursors, must be generated under completely defined conditions. To this purpose, we have developed a two-step xeno-free/feeder-free (XF/FF) culture system to efficiently differentiate hiPSCs into retinal cells. This simple method, relies only on adherent hiPSCs cultured in chemically defined media, bypassing embryoid body formation...
February 20, 2017: Stem Cells
https://www.readbyqxmd.com/read/28220252/long-term-surgical-outcomes-of-the-inverted-internal-limiting-membrane-flap-technique-in-highly-myopic-macular-hole-retinal-detachment
#4
Taiga Kinoshita, Yasutaka Onoda, Takatoshi Maeno
BACKGROUND: Pars plana vitrectomy (PPV) procedures are used for the surgical treatment of macular hole retinal detachment (MHRD) associated with high myopia. Re-detachment of the retina has been reported in MHRD associated with high myopia. Our aim was to evaluate the 1-year outcomes of vitrectomy, performed using an inverted internal limiting membrane (ILM) flap technique with gas tamponade, in five cases of MHRD associated with high myopia. METHODS: We performed a retrospective review of medical records of five consecutive cases of highly myopic MHRD...
February 20, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28216299/hipsc-derived-retinal-ganglion-cells-grow-dendritic-arbors-and-functional-axons-on-a-tissue-engineered-scaffold
#5
Kangjun Li, Xiufeng Zhong, Sijing Yang, Ziming Luo, Kang Li, Ying Liu, Song Cai, Huaiyu Gu, Shoutao Lu, Haijun Zhang, Yantao Wei, Jing Zhuang, Yehong Zhuo, Zhigang Fan, Jian Ge
: Numerous therapeutic procedures in modern medical research rely on the use of tissue engineering for the treatment of retinal diseases. However, the cell source and the transplantation method are still a limitation. Previously, we reported on the induction of a self-organizing three-dimensional neural retina from human-induced pluripotent stem cells (hiPSCs). In this study, we disclose the generation of retinal ganglion cells (RGCs) from the neural retina and their seeding on a biodegradable poly (lactic-co-glycolic acid) (PLGA) scaffold to create an engineered RGC-scaffold biomaterial...
February 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28208170/optical-coherence-tomographic-angiography-in-type-2-diabetes-and-diabetic-retinopathy
#6
Daniel Shu Wei Ting, Gavin Siew Wei Tan, Rupesh Agrawal, Yasuo Yanagi, Nicole Ming Sie, Chee Wai Wong, Ian Yew San Yeo, Shu Yen Lee, Chui Ming Gemmy Cheung, Tien Yin Wong
Importance: Optical coherence tomographic angiography (OCT-A) is able to visualize retinal microvasculature without the need for injection of fluorescein contrast dye. Nevertheless, it is only able to capture a limited view of macula and does not show leakage. Objectives: To evaluate the retinal microvasculature using OCT-A in patients with type 2 diabetes as well as the association of OCT-A characteristics with diabetic retinopathy (DR) and systemic risk factors...
February 16, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28186886/joint-segmentation-of-retinal-layers-and-focal-lesions-in-3d-oct-data-of-topologically-disrupted-retinas
#7
Jelena Novosel, Koenraad Vermeer, Jan H de Jong, Ziyuan Wang, Lucas Van Vliet
Accurate quantification of retinal structures in 3D optical coherence tomography data of eyes with pathologies provides clinically relevant information. We present an approach to jointly segment retinal layers and lesions in eyes with topology-disrupting retinal diseases by a loosely coupled level sets framework. In the new approach, lesions are modelled as an additional space-variant layer delineated by auxiliary interfaces. Furthermore, the segmentation of interfaces is steered by local differences in the signal between adjacent retinal layers thereby allowing the approach to handle local intensity variations...
February 8, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28186885/segmentation-of-locally-varying-numbers-of-outer-retinal-layers-by-a-model-selection-approach
#8
Jelena Novosel, Suzanne Yzer, Koenraad Vermeer, Lucas Van Vliet
Extraction of image-based biomarkers, such as the presence, visibility or thickness of a certain layer, from 3D optical coherence tomography data provides relevant clinical information. We present a method to simultaneously determine the number of visible layers in the outer retina and segment them. The method is based on a model selection approach with special attention given to the balance between the quality of a fit and model complexity. This will ensure that a more complex model is selected only if this is sufficiently supported by the data...
February 8, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28173871/characterization-and-pathogenesis-of-aerosolized-eastern-equine-encephalitis-in-the-common-marmoset-callithrix-jacchus
#9
Aimee I Porter, Rebecca A Erwin-Cohen, Nancy Twenhafel, Taylor Chance, Steven B Yee, Steven J Kern, David Norwood, Laurie J Hartman, Michael D Parker, Pamela J Glass, Luis DaSilva
BACKGROUND: Licensed antiviral therapeutics and vaccines to protect against eastern equine encephalitis virus (EEEV) in humans currently do not exist. Animal models that faithfully recapitulate the clinical characteristics of human EEEV encephalitic disease, including fever, drowsiness, anorexia, and neurological signs such as seizures, are needed to satisfy requirements of the Food and Drug Administration (FDA) for clinical product licensing under the Animal Rule. METHODS: In an effort to meet this requirement, we estimated the median lethal dose and described the pathogenesis of aerosolized EEEV in the common marmoset (Callithrix jacchus)...
February 7, 2017: Virology Journal
https://www.readbyqxmd.com/read/28157410/short-term-vitreoretinal-tamponade-with-heavy-liquid-following-surgery-for-giant-retinal-tear
#10
Maya Eiger-Moscovich, Assaf Gershoni, Ruth Axer-Siegel, Dov Weinberger, Rita Ehrlich
PURPOSE: To study the efficacy and outcomes of short-term postoperative vitreoretinal tamponade with perfluorocarbon heavy liquid in patients with giant retinal tear. MATERIALS AND METHODS: The study group consisted of 13 consecutive patients (13 eyes) who presented with giant retinal tear at a tertiary medical center in 2011-2015 and were treated with vitrectomy followed by short-term tamponade with perfluorocarbon heavy liquid. A minimum of 3 months' follow-up was required for inclusion...
February 3, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28122478/a-no-moving-parts-sensor-for-the-detection-of-eye-fixation-using-polarised-light-and-retinal-birefringence-information
#11
Boris I Gramatikov, David L Guyton
Polarised near-infra-red light is reflected from the foveal area in a detectable bow-tie pattern of polarisation states, offering the opportunity for eye tracking. A coaxial optical transducer was developed, consisting of a laser diode, a polariser, a filter, and a photodetector. Several such transducers may be used to interrogate different spots on the retina, thus eliminating the requirement for scanning systems with moving parts. To test the signal quality obtainable, using just one transducer, a test subject was asked to fixate successively on twelve targets located on a circle around the transducer, to simulate the retina's being interrogated by twelve sensors placed on a 3(0) diameter circle surrounding the projection of the fovea...
January 26, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/28101038/successful-management-in-a-case-of-traumatic-retinal-detachment-due-to-open-globe-injury-using-microincisional-vitrectomy
#12
Wei-Yu Lai, Tsung-Tien Wu
BACKGROUND: Retinal detachment (RD) following ocular trauma often results in guarded visual prognosis and sometimes leads to loss of the eye. With the advent of microincisional vitrectomy surgery and the development of surgical techniques, the management of ocular trauma has been transformed. CASE PRESENTATION: A 34-year-old man sustained an open globe injury from fragmented glass at work. He received primary repair and another follow-up surgery 9 days later, including vitrectomy, silicone oil tamponade, and lensectomy for RD and traumatic cataract at another medical center...
September 2016: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28098710/stellate-nonhereditary-idiopathic-foveomacular-retinoschisis-accompanied-by-contralateral-peripheral-retinoschisis
#13
Daniel Ahmed, Martin Stattin, Carl Glittenberg, Ilse Krebs, Siamak Ansari-Shahrezaei
PURPOSE: To present a patient with stellate nonhereditary idiopathic foveomacular retinoschisis on one eye and peripheral retinoschisis without foveal affection on the other eye. METHODS: A case report with complete workup of family history and clinical examination, including multimodal imaging with optical coherence tomography and angiography, fluorescein angiography, and infrared fundus imaging. Genetic testing for gene mutation XRLS1 was performed. RESULTS: A white woman with unremarkable medical history presented with stellate foveal splitting of the outer plexiform layer on the right eye and peripheral splitting of the outer plexiform layer on both eyes...
January 16, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28088931/development-of-medical-treatment-for-eye-injuries-in-the-mainland-of-china-over-the-past-decade
#14
Chang-Guan Wang, Zhi-Zhong Ma
In the article, the development of medical treatment for eye injuries in the mainland of China was reviewed. According to the data provided in Eye Injury Vitrectomy Study (EIVS), 27% of 72 eyes with no light perception (NLP) gained recovery in term of antomy and visual function. Vitrectomy initiated at more than 4 weeks after open eye injury is an independent risk factor for developing PVR. Prognosis of anatomy and visual function of the injured eye with PVR is markedly worse than that without PVR. Serious injuries of ciliary body, choroid and retina are three key parts of the eye with NLP...
December 1, 2016: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28077885/designing-and-implementation-of-retina-image-drawing-system-and-automatic-report-generation-from-retina-examinations
#15
Reza Safdari, Mehrshad Mokhtaran, Shahram Tahmasebian
INTRODUCTION: Electronic medical records as one of major parts of electronic health records is an important application of Medical Informatics. EMR includes different types of data, Graphical items being one of these data types. To this end, a standard structure for storing and recovering and finally exchanging this data type is required. In order to standardize information items in this research, UMLS standard is used. In this research, graphical information from fondues designing in retina surgery forms is used for the task of implementation...
October 2016: Acta Informatica Medica: AIM
https://www.readbyqxmd.com/read/28058163/clinical-features-and-course-of-patients-with-peripheral-exudative-hemorrhagic-chorioretinopathy
#16
Zafer Cebeci, Yasemin Dere, Şerife Bayraktar, Samuray Tuncer, Nur Kır
OBJECTIVES: To evaluate the clinical characteristics of patients who were followed in our clinic with the diagnosis of peripheral exudative hemorrhagic chorioretinopathy (PEHC). MATERIALS AND METHODS: Medical records of 12 patients who were diagnosed with PEHC in İstanbul University İstanbul Faculty of Medicine, Department of Ophthalmology between July 2006 and June 2014 were reviewed retrospectively. RESULTS: This study included 21 eyes of 12 patients...
October 2016: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28057649/choroid-morphometric-analysis-in-non-neovascular-age-related-macular-degeneration-by-means-of-optical-coherence-tomography-angiography
#17
Maria Vittoria Cicinelli, Alessandro Rabiolo, Alessandro Marchese, Luigi de Vitis, Adriano Carnevali, Lea Querques, Francesco Bandello, Giuseppe Querques
AIMS: To describe the vascular changes in patients affected by non-neovascular age-related macular degeneration (AMD), featuring reticular pseudodrusen (RPD), drusen, or both RPD and drusen by means of optical coherence tomography angiography (OCT-A). METHODS: Cross-sectional observational case series. Patients with non-neovascular AMD presenting at the Medical Retina Service of the Department of Ophthalmology, University Vita-Salute San Raffaele in Milan were recruited...
January 5, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28047428/su-f-t-48-clinical-implementation-of-brachytherapy-planning-system-for-coms-eye-plaques
#18
C Ferreira, M Islam, S Ahmad, T De La Fuente Herman
PURPOSE: To commission the Brachytherapy Planning (BP) system (Varian, Palo Alto, CA) for the Collaborative Ocular Melanoma Study (COMS) eye plaques by evaluating dose differences against original plans from Nucletron Planning System (NPS). METHODS: NPS system is the primary planning software for COMS-plaques at our facility; however, Brachytherapy Planning 11.0.47 (Varian Medical Systems) is used for secondary check and for seed placement configurations not originally commissioned...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045850/construct-and-face-validity-of-the-eyesi-indirect-ophthalmoscope-simulator
#19
Jonathan Chou, Tova Kosowsky, Abhishek R Payal, Luis A Gonzalez Gonzalez, Mary K Daly
PURPOSE: To evaluate construct and face validity of the Eyesi Binocular Indirect Ophthalmoscope Simulator. METHODS: The performance of 25 medical students (Group A) was compared with that of 17 ophthalmology and optometry trainees (Group B) on the Eyesi Binocular Indirect Ophthalmoscope Simulator. During the course of a single session, each participant viewed an orientation module followed by an instruction session and a demonstration case, and performed 6 cases of progressively increasing difficulty (4 levels) and a 10-question face validity questionnaire...
December 29, 2016: Retina
https://www.readbyqxmd.com/read/28007463/electroretinographic-anomalies-in-medicated-and-drug-free-patients-with-major-depression-tagging-the-developmental-roots-of-major-psychiatric-disorders
#20
Marc Hébert, Chantal Mérette, Thomas Paccalet, Anne-Marie Gagné, Michel Maziade
The retina is tagged as an approachable part of the brain due to its common embryonic origin and appears as a promising site of investigation for psychiatric disorders. Retinal function is assessed best with the electroretinogram (ERG), which was obtained in a large sample of patients with major depressive disorder and matched controls. ERG cone and rod luminance response functions were recorded in non-dilated eyes in 100 major depressive disorder patients (MDD) and 100 controls, (mean age of 42.8 and 40.9y...
December 19, 2016: Progress in Neuro-psychopharmacology & Biological Psychiatry
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