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Surgical retina

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https://www.readbyqxmd.com/read/29210941/combined-autologous-transplantation-of-neurosensory-retina-retinal-pigment-epithelium-and-choroid-free-grafts
#1
Barbara Parolini, Dilraj S Grewal, Sajish J Pinackatt, Andrea Baldi, Attilio Di Salvatore, Gianluca Besozzi, Alessandro Finzi, Daniele Cardillo, Tamer H Mahmoud
PURPOSE: To evaluate the feasibility and initial functional and anatomical outcomes of transplanting a full-thickness free graft of choroid and retinal pigment epithelium (RPE), along with neurosensory retina in advanced fibrosis and atrophy associated with end-stage exudative age-related macular degeneration with and without a concurrent refractory macular hole. METHODS: During vitrectomy, an RPE-choroidal and neurosensory retinal free graft was harvested in nine eyes of nine patients...
November 23, 2017: Retina
https://www.readbyqxmd.com/read/29210008/development-and-surgical-removal-of-an-epiretinal-membrane-in-infantile-nystagmus-syndrome-a-new-type-of-oscillopsia
#2
Louis F Dell'Osso, Suber S Huang
PURPOSE: To report and discuss a focal oscillopsia in a small area of the visual field produced by, and after the removal of, an epiretinal membrane (ERM) in an individual with infantile nystagmus syndrome (INS) since birth with no associated afferent visual deficits. STUDY DESIGN: A retrospective case report. METHODS: A chart review, including clinical and electrophysiological data. A 74 y/o man with INS and an epiretinal membrane was studied...
December 5, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29188116/multimodal-nonlinear-optical-imaging-of-unstained-retinas-in-the-epi-direction-with-a-sub-40-fs-yb-fiber-laser
#3
Gabrielle A Murashova, Christopher A Mancuso, Jacob L Canfield, Sanae Sakami, Krzysztof Palczewski, Grazyna Palczewska, Marcos Dantus
Ultrafast lasers have potential use in ophthalmology for diagnoses through non-invasive imaging as well as for surgical therapies or for evaluating pharmacological therapies. New ultrafast laser sources, operating at 1.07 μm and sub-40 fs pulse durations, offer exciting possibilities in multiphoton imagining of the retina as the bulk of the eye is relatively transparent to this wavelength, three-photon excitation is not absorbed by DNA, and this wavelength has a greater penetration depth compared to the commonly used 800 nm Ti:Sapphire laser...
November 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/29179702/foveal-microvasculature-features-of-surgically-closed-macular-hole-using-optical-coherence-tomography-angiography
#4
Joon Hee Cho, Ho Chul Yi, So Hyun Bae, Hakyoung Kim
BACKGROUND: To describe the features of foveal microvasculature using optical coherence tomography angiography (OCTA) and to determine the related clinical factors in eyes with surgically closed macular hole (MH). METHODS: A retrospective case series of 18 patients with unilateral MH was reviewed. The patients maintained complete hole closure after vitrectomy with inner limiting membrane (ILM) peeling for at least 12 months. The healthy fellow eyes were studied as controls...
November 28, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/29176537/novel-surgical-technique-for-inducing-posterior-vitreous-detachment-during-pars-plana-vitrectomy-for-pediatric-patients-using-a-flexible-loop
#5
Linda A Cernichiaro-Espinosa, Audina M Berrocal
PURPOSE: Vitreoretinal surgical diseases in children are challenging because of the complex features of the vitreous, retina, and the interface between them. Posterior vitreous detachment is a crucial step during vitrectomy. To date, pharmacologic vitreolysis that liquefies the vitreous and disrupts the posterior hyaloid attachment to the retina has been studied. However, there are reports of unexplained adverse effects. We describe a case performed with a reproducible, safe and time-saving technique using a commercially available flexible loop for posterior vitreous detachment induction in a pediatric patient...
November 22, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/29165409/-mo-dified-scleral-buckling-for-additional-fixation-of-the-retina-with-endovitreal-magnetic-implant-experimental-study
#6
E G Kazimirova, V V Shiryaev, P V Lyskin, E Yu Kramarenko
Scleral buckling (SB) has been regaining its popularity in the treatment of retinal detachments. On large clinical material, it has been proved to be the technique of choice in phakic patients with retinal detachment of moderate severity. A combined procedure that incorporates features of episcleral as well as intravitreal surgeries has also become widely used. Aim - to investigate the prospects for increasing technical potential of SB, particularly, to investigate the possibility of additional atraumatic mechanical fixation of the retina from within the vitreous cavity...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/29157924/instrumental-variable-methods-for-a-binary-outcome-were-used-to-informatively-address-non-compliance-in-a-randomised-trial-in-surgery
#7
J A Cook, G S Maclennan, T Palmer, N Lois, R Emsley
OBJECTIVES: Randomisation can be used as an instrumental variable (IV) to account for unmeasured confounding when seeking to assess the impact of non-compliance with treatment allocation in a randomised trial. We present and compare different methods to calculate the treatment effect on a binary outcome as a rate ratio in a randomised surgical trial. STUDY DESIGN AND SETTING: The effectiveness of peeling versus not peeling the internal limiting membrane of the retina as part of the surgery for a full thickness macular hole...
November 17, 2017: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/29155697/acute-intraoperative-suprachoroidal-hemorrhage-during-small-gauge-pars-plana-vitrectomy
#8
Intira Sukpen, Jay M Stewart
PURPOSE: To report the intraoperative occurrence of acute intraoperative suprachoroidal hemorrhage during small-gauge pars plana vitrectomy. METHOD: A review of a surgical patient who developed acute intraoperative suprachoroidal hemorrhage during small-gauge pars plana vitrectomy because of bucking under general anesthesia. RESULTS: A 32-year-old obese woman with proliferative diabetic retinopathy and traction retinal detachment in the left eye who developed intraoperative suprachoroidal hemorrhage during small-gauge pars plana vitrectomy because of bucking under general anesthesia while doing endolaser under air infusion...
November 16, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/29152454/recent-advances-in-retinal-stem-cell-therapy
#9
Sujoy Bhattacharya, Rajashekhar Gangaraju, Edward Chaum
Purpose of review: Progress in stem cell research for blinding diseases over the past decade is now being applied to patients with retinal degenerative diseases and soon perhaps, glaucoma. However, the field still has much to learn about the conversion of stem cells into various retinal cell types, and the potential delivery methods that will be required to optimize the clinical efficacy of stem cells delivered into the eye. Recent findings: Recent groundbreaking human clinical trials have demonstrated both the opportunities and current limitations of stem cell transplantation for retinal diseases...
September 2017: Current Molecular Biology Reports
https://www.readbyqxmd.com/read/29148158/long-term-anesthetic-protocol-in-rats-feasibility-in-electrophysiology-studies-in-visual-prosthesis
#10
Alejandro Barriga-Rivera, Veronica Tatarinoff, Nigel H Lovell, John W Morley, Gregg J Suaning
Electrical stimulation of excitable cells provides therapeutic benefits for a variety of medical conditions, including restoration of partial vision to those blinded via some types of retinal degeneration. To improve visual percepts elicited by the current technology, researchers are conducting acute electrophysiology experiments, mainly in cats. However, the rat can provide a model of a range of retinal diseases and possesses a sufficiently large eye to be used in this field. This article presents a long-term anesthetic protocol to enable electrophysiology experiments to further the development of visual prostheses...
November 17, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29147565/operating-room-central-serous-chorioretinopathy
#11
Ahmad M Mansour, Rola Hamam
Objectives: The operating room is a place of surgical intervention with its accompanying bodily and cognitive strain on the performers. Stress in the operating room may lead to the onset of central serous chorioretinopathy as reported hereby in a retina surgeon and is labeled as operating room central serous chorioretinopathy. Methods: The same operator performed the optical coherence tomography scans on one retina surgeon. A masked observer estimated the maximal height of the subretinal fluid...
2017: SAGE Open Medical Case Reports
https://www.readbyqxmd.com/read/29141386/-clinical-characteristics-and-surgical-effect-observation-of-congenital-aniridia-combined-with-cataract
#12
X H Wu, Q Z Cao, Y X Hu, J N Lin, H T Lin, W R Chen, Y Z Liu
Objective: To analyze the clinical manifestations, surgical approaches and postoperative prognosis for the cases of congenital aniridia combined with cataract. Methods: In this retrospective case series, 26 patients diagnosed with congenital aniridia combined with cataract were collected from Zhongshan Ophthalmic Center from February 2002 to August 2016. The Clinical data were collected to analyze the clinical features, surgical approaches and postoperative prognosis. T-test was used for statistical analysis...
November 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29125779/outcomes-of-recurrent-retinal-detachment-surgery-following-pars-plana-vitrectomy-for-rhegmatogenous-retinal-detachment
#13
Vikas Ambiya, Padmaja Kumari Rani, Raja Narayanan, Divya Balakrishnan, Jay Chhablani, Subhadra Jalali, Mudit Tyagi, Rajeev Reddy Pappuru
AIM: To study the anatomical and functional outcomes of recurrent retinal detachment (RD) surgery following pars plana vitrectomy (PPV) for rhegmatogenous retinal detachment. METHODS: Retrospective analysis of 133 consecutive cases of recurrent RD. INCLUSION CRITERIA: age ≥18 years, recurrent RD following PPV ± encircling band for rhegmatogenous RD. EXCLUSION CRITERIA: age <18 years, post-endophthalmitis/tractional/exudative/combined RD, post-scleral buckle, primary surgery done at another institute...
November 10, 2017: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/29110946/assessment-of-the-electronic-retinal-implant-alpha-ams-in-restoring-vision-to-blind-patients-with-end-stage-retinitis-pigmentosa
#14
Thomas L Edwards, Charles L Cottriall, Kanmin Xue, Matthew P Simunovic, James D Ramsden, Eberhart Zrenner, Robert E MacLaren
PURPOSE: To report the initial efficacy results of the Retina Implant Alpha AMS (Retina Implant AG, Reutlingen, Germany) for partial restoration of vision in end-stage retinitis pigmentosa (RP). DESIGN: Prospective, single-arm, investigator-sponsored interventional clinical trial. Within-participant control comprising residual vision with the retinal implant switched ON versus OFF in the implanted eye. PARTICIPANTS: The Retina Implant Alpha AMS was implanted into the worse-seeing eye of 6 participants with end-stage RP and no useful perception of light vision...
October 27, 2017: Ophthalmology
https://www.readbyqxmd.com/read/29101498/surgical-treatments-for-fibrous-tissue-extending-to-the-posterior-retina-in-eyes-with-familial-exudative-vitreoretinopathy
#15
Mari Takahashi, Tadashi Yokoi, Satoshi Katagiri, Tomoyo Yoshida-Uemura, Sachiko Nishina, Noriyuki Azuma
PURPOSE: To describe the clinical features and surgical outcomes of macular dragging or tractional retinal detachment that occurred as a result of fibrovascular tissue (FT) progression toward the posterior retina in eyes with familial exudative vitreoretinopathy (FEVR). METHODS: The medical records of 4 patients (2 girls, 2 boys) with FEVR were reviewed retrospectively. RESULTS: All 4 patients had retinal dragging or radial retinal folds with FT in the peripheral retina in at least 1 eye at the initial visit...
November 3, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29079880/-indications-and-surgical-approach-for-lamellar-macular-holes-and-pseudoholes
#16
REVIEW
C Haritoglou, R G Schumann
BACKGROUND: This article presents a discussion on the indications for surgical interventions of lamellar macular holes and pseudoholes. OBJECTIVE: What are the criteria for deciding on the surgical intervention for lamellar macular holes and pseudoholes? MATERIAL AND METHODS: The article is based on a literature search in PubMed RESULTS: Lamellar macular holes and pseudoholes are subdivided into degenerative and tractive alterations. Both entities are associated with relatively specific morphological and functional criteria, which correlate with the expected functional and morphological results of the surgical intervention...
October 27, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/29078401/development-of-functional-ectopic-compound-eyes-in-scarabaeid-beetles-by-knockdown-of-orthodenticle
#17
Eduardo E Zattara, Anna L M Macagno, Hannah A Busey, Armin P Moczek
Complex traits like limbs, brains, or eyes form through coordinated integration of diverse cell fates across developmental space and time, yet understanding how complexity and integration emerge from uniform, undifferentiated precursor tissues remains limited. Here, we use ectopic eye formation as a paradigm to investigate the emergence and integration of novel complex structures following massive ontogenetic perturbation. We show that down-regulation via RNAi of a single head patterning gene-orthodenticle-induces ectopic structures externally resembling compound eyes at the middorsal adult head of both basal and derived scarabaeid beetle species (Onthophagini and Oniticellini)...
November 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29049728/surgically-induced-focal-retinal-detachment-does-not-cause-detectable-sd-oct-retinal-changes-in-normal-human-retina
#18
MULTICENTER STUDY
Kaitlin Kogachi, Jeremy D Wolfe, Amir H Kashani
Purpose: Induction of focal retinal detachment (RD) for subretinal delivery of stem cells and gene therapy is increasingly common. In order to determine if this procedure has an adverse impact on the retina, we use spectral-domain optical coherence tomography (SD-OCT) to evaluate the pre- and postoperative retinal anatomy of the incidentally detached normal retina surrounding large submacular hemorrhages (SMH) during surgical displacement procedures. Methods: Retrospective, observational study of human subjects with monocular SMH evaluated before and after surgical displacement using clinical exam, fundus photography, and SD-OCT...
October 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29049074/physiology-and-role-of-intraocular-pressure-in-contemporary-anesthesia
#19
Dermot J Kelly, Sinéad M Farrell
More than 26 million Americans suffer with cataracts, and with 3.6 million cataract extractions performed annually in the United States, it is the most common surgical procedure. The integrity of the delicate structures of the eye that mediate vision is dependent on the intraocular pressure (IOP). Yet, IOP acts to compress the vessels within the globe-akin to a Starling resistor-and is a key component that determines the ocular perfusion pressure, defined as the difference between arterial pressure and IOP...
October 17, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29046507/subretinal-implantation-of-okayama-university-type-retinal-prosthesis-ourep-tm-in-canine-eyes-by-vitrectomy
#20
Toshihiko Matsuo, Tetsuya Uchida, Makoto Nitta, Koichiro Yamashita, Shigiko Takei, Daisuke Ido, Mamoru Tanaka, Masao Oguchi, Toshinori Furukawa
Okayama University-type retinal prosthesis (OUReP(TM)) is a photoelectric dye-coupled polyethylene film which generates electric potential in response to light and stimulates nearby neurons. This study aims to test surgical feasibility of subretinal implantation and functional durability of dye-coupled films in the subretinal space. The dye-coupled films were implanted subretinally by 25-gauge vitrectomy in the right eye of 11 normal beagle dogs: 2 dogs served for film removal after 5-month film implantation, 3 dogs for film removal after 3-month film implantation, 3 dogs for 3-month film implantation and pathological examination, and 3 dogs for sham surgery...
October 18, 2017: Journal of Veterinary Medical Science
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