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https://www.readbyqxmd.com/read/28938147/development-of-an-experimental-model-of-burst-fracture-with-damage-characterization-of-the-vertebral-bodies-under-dynamic-conditions
#1
A Germaneau, T Vendeuvre, M Saget, P Doumalin, J C Dupré, F Brémand, F Hesser, C Brèque, P Maxy, M Roulaud, O Monlezun, P Rigoard
BACKGROUND: Burst fractures represent a significant proportion of fractures of the thoracolumbar junction. The recent advent of minimally invasive techniques has revolutionized the surgical treatment of this type of fracture. However mechanical behaviour and primary stability offered by these solutions have to be proved from experimental validation tests on cadaveric specimens. Therefore, the aim of this study was to develop an original and reproducible model of burst fracture under dynamic impact...
September 13, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28937877/changes-in-peripapillary-nerve-fiber-layer-thickness-after-adjuvant-stereotactic-radiotherapy-in-patients-with-neovascular-age-related-macular-degeneration
#2
Mahdy Ranjbar, Maximilian Kurz, Annekatrin Holzhey, Dirk Rades, Salvatore Grisanti
PURPOSE: To evaluate the effect of stereotactic radiotherapy (SRT) in conjunction with intravitreal injections (IVI) of anti-vascular endothelial growth factor (anti-VEGF) drugs on peripapillary retinal nerve fiber layer (pRNFL) thickness in patients with neovascular age-related macular degeneration (nAMD). METHODS: This was a retrospective, observational case series of patients with nAMD, who underwent SRT and subsequently had at least 12 months of complete follow-up...
September 22, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28937823/optic-disc-parameters-of-myopic-children-with-atropine-treatment
#3
Li-Wei Chan, Yi-Ting Hsieh, Wei-Cherng Hsu, Han-Chih Cheng, Elizabeth P Shen
PURPOSE: To characterize optic disc parameters, retinal nerve fiber layer thickness (RNFLT), and the intraocular pressure (IOP) of myopic children under continual topical 0.25% atropine treatment. METHODS: From October 1, 2010 to September 31, 2011, 67 eyes of 35 myopic children were recruited. The children were treated with 0.25% atropine nightly for myopia control. Visual acuity, refraction, IOP, axial length (AL, IOL Master), RNFLT, and optic disc parameters (Stratus OCT) were measured at enrollment and every 2 months...
September 22, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28936083/unilateral-papilledema-in-cerebral-venous-sinus-thrombosis
#4
Girish Baburao Kulkarni, Ravinder Jeet Singh, Veeranna Gadad, Subasree Ramakrishnan, Veerendrakumar Mustare
In the majority of patients with raised intracranial pressure, the papilledema is bilateral. Unilateral papilledema is rare in conditions causing intracranial hypertension, and it has been described in Foster-Kennedy syndrome and in some cases of idiopathic intracranial hypertension. It has never been reported in cerebral venous thrombosis. We report a young lady presenting with features of subacute onset of headache with seizures, on evaluation she had superior sagittal and bilateral lateral sinus thrombosis...
August 2017: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/28936058/multifocal-choroiditis-with-retinal-vasculitis-optic-neuropathy-and-keratoconus-in-a-young-saudi-male
#5
Yousef Dhafiri, Khalid Al Rubaie, Omar Kirat, William N May, Quan D Nguyen, Igor Kozak
The purpose of this study is to describe an association of unilateral multifocal choroiditis (MFC), retinal vasculitis, optic neuropathy, and bilateral keratoconus in a young Saudi male. A 27-year-old male patient with stable bilateral keratoconus presented with a painless vision loss in his left eye. Ophthalmic examinations revealed multiple foci of idiopathic chorioretinitis, retinal vasculitis, and mild optic disc leakage on fluorescein angiography, all of which resolved on systemic therapy with mycophenolate mofetil and prednisone after 3 months...
April 2017: Middle East African Journal of Ophthalmology
https://www.readbyqxmd.com/read/28935833/how-to-use%C3%A2-the-direct-ophthalmoscope
#6
Sam P Gurney, Taiwo Makanjuola, Muhammad Kutubi, Manoj Parulekar, Joseph Abbott
Ophthalmoscopy and red reflex examination are core medical skills required to identify sight-threatening and life-threatening disease. We discuss the predictive utility and limitations of findings with an ophthalmoscope and tips as to how to optimise these. We outline important considerations in three clinical scenarios: an abnormal red reflex, an abnormal optic disc and retinal haemorrhages in the context of child protection concerns.
September 21, 2017: Archives of Disease in Childhood. Education and Practice Edition
https://www.readbyqxmd.com/read/28934871/idiopathic-intracranial-hypertension-vision-venous-intervention-versus-shunting-in-iih-for-optic-nerve-disc-swelling-trial-patient-perspective-questionnaire
#7
Arun Chandran, Heinke Pulhorn, Catherine McMahon
INTRODUCTION: Headaches, visual problems and tinnitus are symptoms of Idiopathic Intracranial Hypertension (IIH) which resolve with reduction of CSF pressure. Impaired cranial venous outflow has been implicated in the pathogenesis and there is evidence of good treatment results in IIH using venous sinus stenting. We are currently initiating a multi-centre randomised controlled trial, the VISION study (Venous Intervention versus Shunting in IIH for Optic Disc Swelling) comparing radiological (venous sinus stenting) to surgical intervention (CSF shunting)...
September 21, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28933966/mobile-laser-indirect-ophthalmoscope-for-the-induction-of-choroidal-neovascularization-in-a-mouse-model
#8
Dov Weinberger, Elite Bor-Shavit, Tilda Barliya, Mor Dahbash, Opher Kinrot, Dan D Gaton, Yael Nisgav, Tami Livnat
PURPOSE: This study aims to evaluate and standardize the reliability of a mobile laser indirect ophthalmoscope in the induction of choroidal neovascularization (CNV) in a mouse model. MATERIALS & METHODS: A diode laser indirect ophthalmoscope was used to induce CNV in pigmented male C57BL/6J mice. Standardization of spot size and laser intensity was determined using different aspheric lenses with increasing laser intensities applied around the optic disc. Development of CNV was evaluated 1, 5, and 14 days post laser application using fluorescein angiography (FA), histology, and choroidal flat mounts stained for the endothelial marker CD31 and FITC-dextran...
September 21, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28928265/outcomes-of-lensectomy-and-risk-factors-for-failure-in-spherophakic-eyes-with-secondary-glaucoma
#9
Divya P Rao, Praveen J John, Mohammed Hasnat Ali, Ramesh Kekunnaya, Subhadra Jalali, Chandra Sekhar Garudadri, Sirisha Senthil
PURPOSE: To report the outcomes of lensectomy in spherophakic eyes with subluxated or dislocated crystalline lenses and secondary glaucoma. METHODS: Lensectomy was performed in 52 eyes, 36 eyes with lens subluxation and 16 eyes with lens dislocation with secondary glaucoma from 1991 to 2016. Glaucoma was diagnosed based on intraocular pressure (IOP) ≥22 mm Hg and/or glaucomatous optic disc damage. Complete success was defined as IOP ≥5 and ≤21 mm Hg without antiglaucoma medications (AGMs) or surgery, and eyes needing oral AGM or surgical intervention for IOP control or those with complication causing loss of light perception were considered failure...
September 19, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28926646/vascular-hypoperfusion-in-acute-optic-neuritis-is-a-potentially-new-neurovascular-model-for-demyelinating-diseases
#10
Ta-Ching Chen, Chao-Yuan Yeh, Chao-Wen Lin, Chung-May Yang, Chang-Hao Yang, I-Hung Lin, Pao-Yang Chen, Jung-Yu Cheng, Fung-Rong Hu
PURPOSE: Optic neuritis is highly correlated with multiple sclerosis and is a major cause of acute visual loss and long-term neuronal degeneration. Primary cerebral hypoperfusion has been reported in brain demyelinating diseases. This study investigated whether peripapillary perfusion is changed in patients with acute optic neuritis (AON). METHODS: This three-year cohort study was conducted from September 1 2012, to August 31, 2015. Two hundred and forty-one patients with non-glaucomatous acute optic neuropathy were screened, and 42 non-highly myopic patients who had suffered their first episode of unilaterally idiopathic AON were studied...
2017: PloS One
https://www.readbyqxmd.com/read/28926186/levels-of-beta-trace-protein-in-optic-disc-pit-with-macular-detachment
#11
Karim Makdoumi, Torbjörn K Nilsson, Sven Crafoord
BACKGROUND: To report beta-trace protein (βTP) levels in the subretinal fluid (SRF) of four patients with a macular detachment associated with optic disc pit (ODP). METHODS: Four patients with a serous retinal detachment involving the macula was operated by pars plana vitrectomy (PPV) with C2 F6 gas tamponade and peeling of internal limiting membrane (ILM). Patients with a follow-up period exceeding one year postoperatively were included in the study. The SRF was drained using a fine cannula without laser photocoagulation, and the samples were analysed using particle-enhancing nephelometry...
September 19, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28924440/swollen-optic-disc-and-sinusitis
#12
Chiara Del Noce, Filippo Marchi, Giacomo Sollini, Michele Iester
PURPOSE: To present a case of optic disc swelling caused by sinusitis. METHODS: Ocular symptoms were investigated using computed tomography imaging of the facial bones to detect the relationship between the sinus inflammation and the optic nerve. RESULTS: A particular configuration of the optic nerve was detected. Optic nerve course through the inflamed sphenoidal sinus is a condition associated with a greater risk of inflammation. CONCLUSION: Sinusitis is a rare but treatable cause of optic neuritis...
May 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28924437/fundus-findings-in-wernicke-encephalopathy
#13
Tal Serlin, Elad Moisseiev
Wernicke encephalopathy (WE) is an acute neuropsychiatric syndrome resulting from thiamine (vitamin B1) deficiency, classically characterized by the triad of ophthalmoplegia, confusion, and ataxia. While commonly associated with chronic alcoholism, WE may also occur in the setting of poor nutrition or absorption. We present a 37-year-old woman who underwent laparoscopic sleeve gastrectomy and presented with visual disturbance with bilateral horizontal nystagmus, confusion, and postural imbalance. Fundus examination revealed bilateral optic disc edema with a retinal hemorrhage in the left eye...
May 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28924418/optical-coherence-tomography-findings-and-successful-repair-of-retina-detachment-in-knobloch-syndrome
#14
Nazanin Ebrahimiadib, Bobeck S Modjtahedi, Kevin Ferenchak, Thanos D Papakostas, Jason S Mantagos, Demetrios G Vavvas
A 7-year-old Afghani girl was referred to the retina clinic of Massachusetts Eye and Ear for a chronic-appearing, macula-off retinal detachment in the left eye. On examination, best-corrected visual acuity was 20/400 in the right eye and 20/800 in the left eye. She had bilateral horizontal nystagmus. Ophthalmoscopy revealed prominent choroidal vessels, chorioretinal atrophy in the macular area, attenuated retinal vasculature, and pale optic discs bilaterally. Spectral domain optical coherence tomography demonstrated atrophy of the choriocapillaris and the retinal pigment epithelium, retinal thinning, and abnormal foveal contour...
2017: Digital Journal of Ophthalmology: DJO
https://www.readbyqxmd.com/read/28920761/can-ultra-wide-field-retinal-imaging-replace-colour-digital-stereoscopy-for-glaucoma-detection
#15
Nicola B Quinn, Augusto Azuara-Blanco, Katie Graham, Ruth E Hogg, Ian S Young, Frank Kee
PURPOSE: Ultra-wide field (UWF) retinal imaging (Optomap, Optos plc, Dunfermline, UK) is a novel technique to image the peripheral fundus. The goal of this study was to explore the potential use of UWF imaging to detect glaucoma, and specifically to evaluate the reproducibility of measures of vertical cup-to-disc ratio (VCDR) using ultra-wide field (UWF), and the agreement between UWF and standard colour digital stereoscopy (CDS). METHODS: An observational study...
September 18, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28917120/automated-arteriole-and-venule-classification-using-deep-learning-for-retinal-images-from-the-uk-biobank-cohort
#16
R A Welikala, P J Foster, P H Whincup, A R Rudnicka, C G Owen, D P Strachan, S A Barman
The morphometric characteristics of the retinal vasculature are associated with future risk of many systemic and vascular diseases. However, analysis of data from large population based studies is needed to help resolve uncertainties in some of these associations. This requires automated systems that extract quantitative measures of vessel morphology from large numbers of retinal images. Associations between retinal vessel morphology and disease precursors/outcomes may be similar or opposing for arterioles and venules...
September 8, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28915256/optical-coherence-tomography-angiography-of-the-peripapillary-capillaries-in-primary-open-angle-and-normal-tension-glaucoma
#17
Ryoko Igarashi, Shun Ochiai, Yuta Sakaue, Aki Suetake, Ryu Iikawa, Testuya Togano, Fuuko Miyamoto, Daiki Miyamoto, Takeo Fukuchi
OBJECTIVES: To evaluate the vascular architecture of the radial peripapillary capillaries (RPCs) and its relation with visual function in patients with open-angle glaucoma (OAG) and normal-tension glaucoma using spectral-domain optical coherence tomography (SD-OCT) angiography. SUBJECTS AND METHODS: Clear OCT angiography images of blood vessels in the optic disc and peripapillary retina were obtained from 52 patients (52 eyes) aged 55.42±10.64 (range 28-72) years with primary OAG...
2017: PloS One
https://www.readbyqxmd.com/read/28912514/retinal-changes-following-rapid-ascent-to-a-high-altitude-environment
#18
X Tian, B Zhang, Y Jia, C Wang, Q Li
PurposeTo determine what impact rapid ascension to a high-altitude environment has on the retina with the aim of preventing and treating high-altitude oculopathy.Patients and methodsParticipants in the study were members of the Chinese military assigned to the high-altitude environment of the Tibetan plateau. Ninety-one participants were enrolled in the study. Optical coherence tomography was used to measure the thickness of retina-related indicators. Measurements were taken before and after exposure to the high-altitude environment and upon return to the baseline altitude...
September 15, 2017: Eye
https://www.readbyqxmd.com/read/28904983/structure-function-relationships-in-the-visual-system-in-multiple-sclerosis-an-meg-and-oct-study
#19
Prejaas Tewarie, Lisanne J Balk, Arjan Hillebrand, Martijn D Steenwijk, Bernard M J Uitdehaag, Cornelis J Stam, Axel Petzold
BACKGROUND: We conducted a multi-modal optical coherence tomography (OCT) and magnetoencephalography (MEG) study to test whether there is a relationship between retinal layer integrity and electrophysiological activity and connectivity (FC) in the visual network influenced by optic neuritis (ON) in patients with multiple sclerosis (MS). METHODS: One hundred and two MS patients were included in this MEG/OCT study. Retinal OCT data were collected from the optic discs, macular region, and segmented...
September 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/28903966/laser-in-glaucoma-and-ocular-hypertension-light-trial-a-multicentre-randomised-controlled-trial-design-and-methodology
#20
Gus Gazzard, Evgenia Konstantakopoulou, David Garway-Heath, Keith Barton, Richard Wormald, Stephen Morris, Rachael Hunter, Gary Rubin, Marta Buszewicz, Gareth Ambler, Catey Bunce
PURPOSE: The Laser in Glaucoma and Ocular Hypertension (LiGHT) Trial aims to establish whether initial treatment with selective laser trabeculoplasty (SLT) is superior to initial treatment with topical medication for primary open-angle glaucoma (POAG) or ocular hypertension (OHT). DESIGN: The LiGHT Trial is a prospective, unmasked, multicentre, pragmatic, randomised controlled trial. 718 previously untreated patients with POAG or OHT were recruited at six collaborating centres in the UK between 2012 and 2014...
September 13, 2017: British Journal of Ophthalmology
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