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Surgical retina

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https://www.readbyqxmd.com/read/28547316/preliminary-study-of-the-safety-and-efficacy-of-medium-chain-triglycerides-for-use-as-an-intraocular-tamponading-agent-in-minipigs
#1
Vincent J Soler, Camille Laurent, Frédéric Sakr, Alain Regnier, Cyrielle Tricoire, Olivier Cases, Renata Kozyraki, Jean-Yves Douet, Véronique Pagot-Mathis
PURPOSE: To date, only silicone oils and gases have the appropriate characteristics for use in vitreo-retinal surgery as vitreous substitutes with intraocular tamponading properties. This preliminary study evaluated the safety and efficacy of medium-chain triglycerides (MCTs) for use as a tamponading agent in minipigs. METHODS: In 15 minipigs, 15 right eyes underwent vitrectomies followed by injection of MCT tamponade (day 1). Two groups were defined. In Group A (ten eyes), the surgical procedure before MCT injection included induced rhegmatogenous retinal detachment (RRD), retina flattening, and retinopexy...
May 25, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28546696/new-surgical-technique-for-management-of-recurrent-macular-hole
#2
Osman Abdelzaher Mohammed, Anant Pai
Recurrence of macular hole (MH) following the standard approach of pars plana vitrectomy, posterior hyaloids removal, internal limiting membrane peeling, gas tamponade, and postoperative positioning is a common postoperative complication following MH surgery. We present a new surgical technique which involves induction of serous macular detachment around the MH, parafoveal retinal massage to bring its edges closer, gas tamponade, and face down positioning. The recurrent MHs had closed in all four consecutive patients with a parallel gain in visual acuity following this technique...
January 2017: Middle East African Journal of Ophthalmology
https://www.readbyqxmd.com/read/28542372/revision-of-encapsulated-blebs-after-trabeculectomy-long-term-comparison-of-standard-bleb-needling-and-modified-needling-procedure-combined-with-transconjunctival-scleral-flap-sutures
#3
P Laspas, P D Culmann, F H Grus, V Prokosch-Willing, A Poplawksi, N Pfeiffer, E M Hoffmann
PURPOSE: To compare two surgical approaches for treating encapsulated blebs after trabeculectomy with mitomycin C, in terms of the development of intraocular pressure and progression of glaucoma in a long-term follow up: 1. bleb needling alone vs. 2. a combined approach of needling with additional transconjunctival scleral flap sutures, to prevent early ocular hypotony. METHODS: Forty-six patients with failing blebs after trabeculectomy with mitomycin C were enrolled in this study...
2017: PloS One
https://www.readbyqxmd.com/read/28542257/long-term-results-after-limited-macular-translocation-surgery-for-wet-age-related-macular-degeneration
#4
Hisaaki Oshima, Takeshi Iwase, Kohei Ishikawa, Kentaro Yamamoto, Hiroko Terasaki
PURPOSE: To evaluate the long-term results of limited macular translocation (LMT) surgery with radial chorioscleral outfolding in patients with wet age-related macular degeneration (AMD) and subfoveal choroidal neovascularization (CNV). In addition, to identify the factors associated with the final best-corrected visual acuity (BCVA). METHODS: The medical records of 20 eyes of 20 consecutive patients (65.2±9.8 years) who had undergone LMT for the treatment of wet AMD and were followed for at least 5 years, were reviewed...
2017: PloS One
https://www.readbyqxmd.com/read/28541930/progress-in-artificial-vision-through-suprachoroidal-retinal-implants
#5
Lilach Bareket, Alejandro Barriga-Rivera, Marc Patrick Zapf, Nigel H Lovell, Gregg J Suaning
Retinal implants have proven their ability to restore visual sensation to people with degenerative retinopathy, characterized by photoreceptor cell death and the retina's inability to sense light. Retinal bionics operate by electrically stimulating the surviving neurons in the retina, thus triggering the transfer of visual sensory information to the brain. Suprachoroidal implants were first investigated in Australia in the 1950s. In this approach, the neuromodulation hardware is positioned between the sclera and the choroid, thus providing significant surgical and safety benefits for patients, with the potential to maintain residual vision combined with the artificial input from the device...
May 25, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28525683/multilayer-microstructure-of-idiopathic-epiretinal-macular-membranes
#6
Claudio Azzolini, Terenzio Congiu, Simone Donati, Alberto Passi, Petra Basso, Eliana Piantanida, Cesare Mariotti, Francesco Testa, Simona M Caprani, Jennifer Cattaneo, Riccardo Vinciguerra
PURPOSE: To identify the ultramicroscopic structure of idiopathic epiretinal macular membranes (iEMMs) by scanning electron microscopy (SEM). METHODS: We examined 28 iEMMs surgically removed from 28 eyes of 28 patients. All specimens, previously observed at stereomicroscope, were treated with an osmium maceration technique. Fine resolution of iEMMs' 3D architecture and their interaction with the retina were studied using a Philips SEM-FEG XL-30 microscope. RESULTS: The specimens appeared as laminar connective structures partially or completely adherent to the inner limiting membrane (ILM)...
May 19, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28524147/-complex-treatment-results-in-a-congenital-glaucoma-patient-case-report
#7
O L Fabrikantov, S I Nikolashin, Yu V Matrosova, V A Kozlov, A E Kopylov, E S Pirogova
Early diagnosis of congenital glaucoma allows surgery to be performed at the stage of reversible glaucomatous alterations of the optic disc and retina. In primary congenital glaucoma, the main reason for visual acuity reduction following surgical stabilization of the intraocular pressure are corneal changes. These include an increased corneal diameter, Haab's striae, areas of thickening and a greater posterior elevation. The resultant irregular astigmatism leads to amblyopia and a marked decrease in visual acuity...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/28512423/refined-internal-limiting-membrane-inverted-flap-technique-for-intractable-macular-detachment-with-optic-disc-pit
#8
Rumiko Hara, Yasutomo Tsukahara, Tsuyoshi Simoyama, Soutarou Mori
PURPOSE: To report a surgical technique for retinal detachment associated with optic disc pit (ODP) by using an internal limiting membrane (ILM) inverted flap as an obstacle between the vitreous cavity and subretinal space. CASE PRESENTATION: A 43-year-old man presented with decreased visual acuity in the right eye for 1 week due to macular detachment associated with ODP. After 2 unsuccessful surgeries, the retina was reattached by vitrectomy with an ILM inverted flap onto the ODP...
January 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28494561/-observation-of-single-layered-inverted-internal-limiting-membrane-flap-technique-for-macular-hole-with-retinal-detachment-in-high-myopia
#9
C Z Xu, J H Wu, J W He, C Feng
Objective: To compare the outcome of pars plana vitrectomy (PPV) with a single-layered inverted internal limiting membrane (ILM) flap versus PPV with ILM peeling for the treatment of macular hole associated retinal detachment (MHRD) in high myopia. Methods: In a retrospective cohort study, PPV with 2 kinds of adjuvant surgical procedures were used in 35 moderately high myopia eyes with MHRD. These eyes were divided into 2 groups: group 1 (17 eyes) receiving PPV and ILM peeling and group 2 (18 eyes) receiving PPV with a single-layered inverted ILM flap...
May 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28467586/an-excellent-anatomical-and-visual-recovery-after-surgical-repair-of-an-open-eye-injury-with-poor-baseline-prognostic-factors
#10
Serpil Yazgan, Orhan Ayar, Orçun Akdemir, Yaran Koban
Presently described is case of a 42-year-old woman with eye injury that was result of gunshot fired by a man at a wedding celebration. Bullet penetrated inferior quadrant of nasal sclera of left eye 7-12 mm behind limbus. Choroid and vitreous were prolapsed around bullet. Hemorrhage, vitreous prolapse and lens subluxation were present in anterior chamber. Presenting visual acuity (VA) was hand motion. Bullet 14x5 mm in size was carefully extracted from the eye. Fifteen days later, argon laser photocoagulation was performed on retina in area of bullet entry point...
March 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/28450823/proteomic-profiling-of-human-intraschisis-cavity-fluid
#11
Dhandayuthapani Sudha, Mahdokht Kohansal-Nodehi, Purnima Kovuri, Srikanth Srinivas Manda, Srividya Neriyanuri, Lingam Gopal, Pramod Bhende, Subbulakshmi Chidambaram, Jayamuruga Pandian Arunachalam
BACKGROUND: X-linked retinoschisis (XLRS) is a vitreoretinal degenerative disorder causing vision deterioration, due to structural defects in retina. The hallmark of this disease includes radial streaks arising from the fovea and splitting of inner retinal layers (schisis). Although these retinal changes are attributed to mutations in the retinoschisin gene, schisis is also observed in patients who do not carry mutations. In addition, the origin of intraschisis fluid, the triggering point of schisis formation and its progression are largely unknown still...
2017: Clinical Proteomics
https://www.readbyqxmd.com/read/28425224/nanocarrier-mediated-retinal-drug-delivery-overcoming-ocular-barriers-to-treat-posterior-eye-diseases
#12
REVIEW
Rohit Bisht, Abhirup Mandal, Jagdish K Jaiswal, Ilva D Rupenthal
Effective drug delivery to the retina still remains a challenge due to ocular elimination mechanisms and complex barriers that selectively limit the entry of drugs into the eye. To overcome these barriers, frequent intravitreal injections are currently used to achieve high drug concentrations in vitreous and retina. However, these repetitive injections may result in several side effects. Recent advancements in the field of nanoparticle-based drug delivery could overcome some of these unmet needs and various preclinical studies conducted to date have demonstrated promising results of nanotherapies in the treatment of retinal diseases...
April 20, 2017: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/28419404/use-of-evicel-fibrin-sealant-in-optic-disc-pit-associated-macular-detachment
#13
Paulo Ricardo Chaves de Oliveira, Alan Richard Berger, David Robert Chow
Optic disc pit is a rare congenital anomaly of the optic nerve. Retinal detachment is a common complication with poor outcomes. Many surgical alternatives have been described for the treatment of this condition, producing variable results. Herein, the authors describe four cases of optic disc pit-associated macular detachment managed with pars plana vitrectomy, fluid-air exchange, drainage of subretinal fluid through the optic disc pit, temporal peripapillary laser, and application of Evicel fibrin sealant (human) (Ethicon, Bridgewater, NJ) over the optic disc head...
April 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28412066/ranibizumab-injection-as-primary-treatment-in-patients-with-retinopathy-of-prematurity-anatomic-outcomes-and-influencing-factors
#14
Qiujing Huang, Qi Zhang, Ping Fei, Yu Xu, Jiao Lyu, Xunda Ji, Jie Peng, Yi-An Li, Peiquan Zhao
PURPOSE: To investigate the anatomic outcomes and influencing factors of ranibizumab in the treatment of retinopathy of prematurity (ROP). DESIGN: Retrospective case series. PARTICIPANTS: A total of 283 eyes of 145 patients with type 1 ROP treated with intravitreal injection of ranibizumab (IVR) as primary treatment. METHODS: Retrospective review of infants who were diagnosed with type 1 ROP and accepted IVR (0.25 mg/0...
April 12, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28351053/macular-edema-rationale-for-therapy
#15
Thomas J Wolfensberger
Macular edema represents the end-stage of multiple pathophysiological pathways in a multitude of ocular vascular, inflammatory, and other diseases. The rationale for clinical treatment of macular edema is based on the understanding and the inhibition of these pathophysiological mechanisms. When macular edema is caused by a generalized health problem such as diabetes, high blood pressure, or generalized inflammatory conditions, treatment of these generalized diseases can in many cases cure macular edema directly...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28349647/finite-element-modeling-validation-and-parametric-investigations-of-a-retinal-reattachment-stent
#16
R Rusovici, D Dalli, K Mitra, G Ganiban, M Grace, R Mazzocchi, M Calhoun
A new retinal reattachment surgical procedure is based on a stent that is deployed to press the retina back in place. An eye-stent finite element model studied the strain induced by the stent on retina. Finite element model simulations were performed for several stent geometric configurations (number of loops, wire diameter, and intraocular pressure). The finite element model was validated against experiment. Parametric studies demonstrated that stents could be successfully designed so that the maximum strain would be below permanent damage strain threshold of 2%...
March 27, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28337066/paintball-related-ocular-injuries-first-case-report-in-saudi-patients
#17
Mohammad Al-Amry, Huda Al-Ghadeer
Paintball is a popular recreational sport. This case series describes three Saudi patients exposed to paintball ocular injuries with sever ocular trauma. Two patients developed hyphema and traumatic cataract and one patient had vitreous hemorrhage, choroidal detachment, commotio retinae and retinal tear. All patients require surgical intervention. Final best corrected visual acuity was 20/200, 20/30 and 20/50 respectively. Paintball related ocular injuries can result in severe visual loss and in most of the time requires surgical intervention...
January 2017: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28306625/visualization-of-the-retina-and-vitreous-during-vitreoretinal-surgery-new-technologies
#18
REVIEW
Sarah P Read, Jorge A Fortun
PURPOSE OF REVIEW: Visualization remains a critical factor in successful ocular surgery.Here we review new technology that has the potential to allow for safer and more efficient retinal surgery. RECENT FINDINGS: Vitreoretinal surgery poses unique visualization challenges such as the need for specialized optical systems and the delicate and microscopic features of retinal structures. Better retinal visualization allows for new approaches to increasingly complex retinal cases...
May 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28299000/chorioretinal-coloboma-complications-retinal-detachment-and-choroidal-neovascular-membrane
#19
Rehan M Hussain, Ashkan M Abbey, Ankoor R Shah, Kimberly A Drenser, Michael T Trese, Antonio Capone
PURPOSE: To report the chorioretinal coloboma, and its association with increased risk of retinal detachment (RD) and choroidal neovascularization (CNV). METHODS: This retrospective case series included eyes with chorioretinal coloboma diagnosed between 1995 and 2014 with a focus on RD and CNV as related complications. Cases of CNV were managed with laser photocoagulation or intravitreal injection of bevacizumab. For eyes with CNV, therapeutic success was defined as resolution of the subretinal hemorrhage on fundus examination and resolution of the subretinal and intraretinal fluid on optical coherence tomography (OCT)...
January 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28297040/repair-of-total-tractional-retinal-detachment-in-norrie-disease-report-of-technique-and-successful-surgical-outcome
#20
Bozho Todorich, Aristomenis Thanos, Yoshihiro Yonekawa, Antonio Capone
Norrie disease is a rare, but devastating cause of pediatric retinal detachment, universally portending a poor visual prognosis. This paper describes successful surgical management of an infant with total retinal detachment associated with Norrie disease mutation. The infant was a full-term white male who presented with bilateral total funnel retinal detachments (RDs). He underwent genetic testing, which demonstrated single-point mutation 133 G>A transition in exon 2 of the NDP gene. The retinal detachment was managed with translimbal iridectomy, lensectomy, capsulectomy, and vitrectomy...
March 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
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