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Pars plana vitrectomy

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https://www.readbyqxmd.com/read/28432184/management-of-a-case-of-myopic-foveoschisis-with-phakic-intraocular-lens-piol-in-situ-intraoperative-challenges
#1
Atul Kumar, Aditi Mehta, Raghav Dinesh Ravani, Prateek Kakkar
We describe the case of a 30-year-old man with pathological myopia with a phakic intraocular lens (IOL) (Visian ICL V4c model; STAAR, Monrovia, California, USA) in situ having complaints of metamorphopsia in the left eye with documented myopic foveoschisis on swept-source optical coherence tomography (DRI OCT Triton; Topcon, Tokyo, Japan). The patient underwent pars plana vitrectomy with internal limiting membrane peeling. This report discusses the intraoperative challenges occurring as a result of increased optical aberrations in the presence of a phakic IOL...
April 20, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28430329/ahmed-valves-vs-trabeculectomy-combined-with-pans-plana-vitrectomy-for-neovascular-glaucoma-with-vitreous-hemorrhage
#2
Menghua H Wang, Qiuming M Li, Hongtao T Dong, Shuqian Q Dong, Yang Li, Chunyan Y Zheng
PURPOSE: Vitreous hemorrhage is common in advanced neovascular glaucoma (NVG), which has poor visual prognosis. This study aimed to compare the efficacy of 23-G pars planar vitrectomy (PPV) combined with either Ahmed glaucoma valve (AGV) implantation or trabeculectomy after intravitreal ranibizumab (IVR) treatment for NVG with vitreous hemorrhage. METHODS: This retrospective, nonrandomized study included 33 eyes of 33 patients with NVG with vitreous hemorrhage. After IVR treatment for 3-7 days, 18 eyes underwent PPV + AGV (AGV group) and 15 underwent PPV + trabeculectomy (trabeculectomy group)...
April 14, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28428970/changes-in-anterior-segment-parameters-following-pars-plana-vitrectomy-measured-by-ultrasound-biomicroscopy-ubm
#3
Zahra Ghomi, Fariba Ghassemi
Despite being a posterior segment ocular surgery, pars plana vitrectomy (PPV) may also affect anterior segment parameters. We aimed to investigate anterior segment alterations following PPV using ultrasound biomicroscopy (UBM) to visualize the structural anatomy of the eye. In this study, we enrolled phakic patients undergoing PPV (as the sole procedure). The anterior chamber depth, crystalline lens anterior-posterior (AP) diameter, anterior chamber angle, ciliary body dimensions, and integrity of the ciliary zonules and posterior capsule were assessed using UBM before and at least 3 months after PPV...
2017: Medical Hypothesis, Discovery and Innovation in Ophthalmology
https://www.readbyqxmd.com/read/28426852/an-outbreak-of-endogenous-fungal-endophthalmitis-among-intravenous-drug-abusers-in-new-england
#4
Aubrey R Tirpack, Jay S Duker, Caroline R Baumal
Importance: Intravenous drug abuse (IVDA) is a known risk factor for endogenous fungal endophthalmitis (EFE), a severe intraocular infection caused by hematogenous seeding of mycotic organisms to the eye. Reporting significant increases in heroin-related deaths since 2014, the New England region is in the midst of an opioid crisis that has led to a substantial increase in patients at risk for this vision-threatening disease. Objective: To present an update on characteristics, management, and visual outcomes in patients with EFE...
April 20, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28426628/ocular-hypertension-and-glaucoma-following-vitrectomy-a-systematic-review
#5
Alba Miele, Andrea Govetto, Carlo Fumagalli, Simone Donati, Ilaria Biagini, Claudio Azzolini, Stanislao Rizzo, Gianni Virgili
PURPOSE: Pars plana vitrectomy has been reported to increase the risk of ocular hypertension and open-angle glaucoma. The authors conducted a systematic review of randomized and nonrandomized studies to compare the incidence of open-angle glaucoma and ocular hypertension in vitrectomized versus nonvitrectomized eyes. METHODS: A literature search was performed using MEDLINE and EMBASE until August 2016. Data on ocular hypertension and open-angle glaucoma incidence and mean intraocular pressure after at least 1 year were pooled using random-effects metaanalysis models...
April 19, 2017: Retina
https://www.readbyqxmd.com/read/28419404/use-of-evicel-fibrin-sealant-in-optic-disc-pit-associated-macular-detachment
#6
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/28419402/autologous-free-internal-limiting-membrane-flap-for-optic-nerve-head-pit-with-maculopathy
#7
Palmeera D'Souza, Upendra Babu, Venkatapathy Narendran
Optic disc pits (ODPs) are associated with serous macular detachment (SMD), which causes visual loss in 25% to 75% patients with ODPs. There are various modalities of noninvasive and invasive treatment options; however, the best method of treatment is to seal the optic disc to prevent further egress of fluid into the subretinal space. The authors report a technique that involves sealing of ODPs with autologous free flap of the internal limiting membrane (ILM). After trans pars plana vitrectomy, the ILM was peeled and plugged into the ODP...
April 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28413410/eccentric-macular-hole-after-pars-plana-vitrectomy-for-idiopathic-macular-hole-a-case-report
#8
Irini Chatziralli, George Theodossiadis, Maria Douvali, Alexandros A Rouvas, Panagiotis Theodossiadis
INTRODUCTION: Postoperative eccentric macular hole (MH) formation is an uncommon complication after pars plana vitrectomy (PPV) with internal limiting membrane (ILM) peeling for epiretinal membrane or MH treatment. Herein, we present a case of eccentric MH formation after PPV with ILM peeling for MH. CASE DESCRIPTION: A 72-year-old female patient underwent 23-gauge PPV with ILM peeling for idiopathic MH in her right eye. The visual acuity was 6/24 in the right eye...
January 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28412795/-pay-attention-to-the-complexity-of-cataract-surgery-of-no-vitreous-eyes
#9
Y Z Bao
With wide-spread performance of pars plana vitrectomy, cataract surgeries with no vitreous are getting more and more. This kind of surgery has great difference between individuals and it lacks randomized large sample clinical trial. Surgical strategy decision was basically relied on the surgeon's personal experience. We should fully aware the individual and common characteristics of no vitreous cataract surgery. Surgical time should be carefully decided. Complete ocular examination, evaluation, design of cataract surgical procedure and appropriate intra-ocular lens selection are needed...
April 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28412773/massive-subretinal-and-subretinal-pigment-epithelial-hemorrhage-displacement-with-perfluorocarbon-liquid-using-a-two-step-vitrectomy-technique
#10
Efrat Fleissig, Adiel Barak, Michaela Goldstein, Anat Loewenstein, Shulamit Schwartz
PURPOSE: The purpose of this study was to evaluate the efficacy and visual outcome of massive submacular hemorrhage (SMH) displacement with a planned two-step pars plana vitrectomy (PPV) using tissue plasminogen activator (tPA) and perfluorocarbon liquid (PFCL) tamponade. METHODS: A retrospective case series of patients with age related macular degeneration and SMH was used. All patients underwent a 23G PPV, subretinal tPA injection and a medium term PFCL tamponade...
April 15, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28412068/vitreous-amyloidosis-ocular-systemic-and-genetic-insights
#11
Pradeep Venkatesh, Harathy Selvan, Sundararajan Baskar Singh, Divya Gupta, Seema Kashyap, Shreyas Temkar, Varun Gogia, Koushik Tripathy, Rohan Chawla, Rajpal Vohra
PURPOSE: To report the unique clinical and surgical characteristics encountered in eyes with vitreous amyloidosis. Systemic evaluation and visual outcome after vitrectomy are discussed. A novel mutation in the transthyretin gene (TTR) in Indian patients with familial amyloid polyneuropathy (FAP) is described. DESIGN: Retrospective, observational study. PARTICIPANTS: Ten eyes of 5 patients from 2 pedigrees with a diagnosis of vitreous amyloidosis...
April 12, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28410708/twenty-nine-gauge-dual-chandelier-retroillumination-for-the-non-open-sky-continuous-curvilinear-capsulorhexis-in-the-penetrating-keratoplasty-triple-procedure
#12
Shunji Yokokura, Takehiro Hariya, Wataru Kobayashi, Yasuhiko Meguro, Kohji Nishida, Toru Nakazawa
We describe a technique for the penetrating keratoplasty (PKP) triple procedure that uses 29-gauge dual-chandelier illumination during creation of a non-open-sky continuous curvilinear capsulorhexis (CCC). The chandeliers are inserted through the pars plana into the vitreous cavity through the bulbar conjunctiva at the 3 o'clock and 9 o'clock positions. We compared this approach with that of a core vitrectomy, in which a single 25-gauge port is inserted into the vitreous cavity transconjunctivally through the upper temporal pars plana...
March 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28409022/the-safety-and-efficacy-of-adjustable-postoperative-position-after-pars-plana-vitrectomy-for-rhegmatogenous-retinal-detachment
#13
Zhong Lin, Jin Tao Sun, Rong Han Wu, Nived Moonasar, Ye Hui Zhou
Purpose. To report the safety and efficacy of adjustable postoperative position for rhegmatogenous retinal detachment (RRD). Methods. Retrospective review of 536 consecutive RRD eyes that underwent vitrectomy surgery for retina repair from year 2008 to 2014. The retinal breaks were divided into superior, lateral (nasal, temporal, and macular), and inferior locations, according to the clock of breaks. Patients with superior and lateral break location were allowed to have facedown position or lateral decubitus position postoperatively, while patients with inferior break location were allowed to have facedown position...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28409021/tissue-distribution-of-trans-resveratrol-and-its-metabolites-after-oral-administration-in-human-eyes
#14
Shuaishuai Wang, Zheng Wang, Shuo Yang, Tiemei Yin, Yaoli Zhang, Yuanjun Qin, Robert N Weinreb, Xufang Sun
Purpose. This study was performed to measure the concentration of trans-resveratrol and its three metabolites in human eyes. Methods. The patients who underwent pars plana vitrectomy for rhegmatogenous retinal detachment were included. The participants were orally given trans-resveratrol-based supplement (Longevinex®). A suitable amount of conjunctiva, aqueous humor, and vitreous humor were obtained during the operation. High-performance liquid chromatography (HPLC) with mass spectrometry (LC/MS/MS) was used to detect the concentration of trans-resveratrol and its three metabolites in the various samples...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28402943/expression-of-wild-type-p53-induced-phosphatase-1-in-diabetic-epiretinal-membranes
#15
Jiping Xu, Haibin Zhong, Ling Cui, Qianqian Lan, Lifei Chen, Wenjing He, Yu Wu, Li Jiang, Hui Huang, Xin Zhao, Li Li, Siming Zeng, Min Li, Fan Xu
OBJECTIVE: The aims of the present study were to investigate the expression and distribution of Wild-type p53-induced phosphatase 1 (Wip1) in diabetic patients with proliferative diabetic retinopathy (PDR) with epiretinal membranes (ERMs) meanwhile analyze the colocalization of Wip1 and nuclear factor kappa-B (NF-╬║B) p65 in ERMs. METHODS: ERMs samples were collected from patients with PDR (PDR group) or non-diabetic patients with idiopathic epiretinal membranes (iERMs) (control group) during pars plana vitrectomy...
March 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28399127/ultrastructural-and-histopathologic-findings-after-pars-plana-vitrectomy-with-a-new-hypersonic-vitrector-system-qualitative-preliminary-assessment
#16
Salvador Pastor-Idoate, Richard Bonshek, Luciane Irion, Isaac Zambrano, Paul Carlin, Aleksandr Mironov, Paul Bishop, David McLeod, Paulo Eduardo Stanga
PURPOSE: Preliminary assessment of a new prototype ultrasound-based hypersonic vitrector (HV) by qualitatively examining the histopathological changes in the retina and vitreous body after pars plana vitrectomy (PPV) and its ability to fragment vitreous collagen. METHODS: Fourteen porcine cadaveric eyes, 20 eyes in live swine and six human cadaveric eyes underwent PPV using the HV or a pneumatic guillotine vitrector (GV). An additional 4 porcine crystalline lenses were touched with either the HV or GV for 1 minute...
2017: PloS One
https://www.readbyqxmd.com/read/28396814/the-histopathological-finding-of-the-surgically-extracted-atypical-dome-shaped-choroidal-osteoma
#17
Hirona Bessho, Hisanori Imai, Atsushi Azumi
Purpose. To report a case of atypical dome-shaped choroidal osteoma, which was diagnosed by histopathological finding of surgically extracted tumor. Case Report. A 35-year-old woman presented with visual field abnormality in the left eye (OS). Her best-corrected visual acuity with Landolt ring chart was 1.0 OS. The funduscopic examination revealed a yellowish dome-shaped choroidal tumor located in the temporal side of the macula with exudative retinal detachment. 25-gauge pars plana vitrectomy and the extraction of the tumor were performed for the definitive diagnosis...
2017: Case Reports in Ophthalmological Medicine
https://www.readbyqxmd.com/read/28394835/metamorphopsia-and-outer-retinal-morphologic-changes-after-successful-vitrectomy-surgery-for-macula-off-rhegmatogenous-retinal-detachment
#18
Tetsuhiko Okuda, Tomomi Higashide, Kazuhisa Sugiyama
PURPOSE: To evaluate the correlation between metamorphopsia and outer retinal morphologic changes after successful vitrectomy for rhegmatogenous retinal detachment (RRD). METHODS: Forty eyes from 40 patients with macula-off (26 eyes) or macula-on (14 eyes) RRDs that underwent pars plana vitrectomy were included. Metamorphopsia was quantified with M-CHARTS. The relationship between the integrity of the outer retinal layers examined by spectral domain optical coherence tomography and metamorphopsia at 6 and 12 months postoperatively was evaluated...
January 23, 2017: Retina
https://www.readbyqxmd.com/read/28389773/analysis-of-clinical-features-and-visual-outcomes-of-pars-planitis
#19
Nilufer Berker, Emine Sen, Ufuk Elgin, Cemile Ucgul Atilgan, Erdem Dursun, Pelin Yilmazbas
PURPOSE: To evaluate the demographic characteristics, clinical features, treatment and outcomes of patients with pars planitis in a tertiary referral center in Turkey. METHODS: Medical records of patients with pars planitis were retrospectively reviewed. The data including demographic and ocular features and treatment outcomes were recorded. The distribution of clinical findings and complications were evaluated according to age and gender groups. The changes in final BCVA compared to the initial BCVA were noted...
April 7, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28389702/cooperative-robot-assistant-for-vitreoretinal-microsurgery-development-of-the-rvrms-and-feasibility-studies-in-an-animal-model
#20
Yi-Qi Chen, Ji-Wei Tao, Ling-Ya Su, Liang Li, Shi-Xin Zhao, Yang Yang, Li-Jun Shen
PURPOSE: The purpose of the study was to describe the development of a robotic aided surgical system named RVRMS (robotic vitreous retinal microsurgery system) and to evaluate the capability for using it to perform vitreoretinal surgery. METHODS: The RVRMS was designed and built to include the key components of two independent arms. End-effectors of each arm fix various surgical instruments and perform intraocular manipulation. To evaluate properly the RVRMS, robot-assisted 23-gauge surgical tasks including endolaser for retinal photocoagulation, pars plana vitrectomy (PPV), retinal foreign body removal and retinal vascular cannulation were performed in two different sizes of an animal model...
April 8, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
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