671 results on '"Rubens Belfort"'
Search Results
652. O significado do Título Ph.D
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Rubens Belfort
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Ophthalmology ,lcsh:Ophthalmology ,lcsh:RE1-994 ,General Medicine
653. Avaliação Internacional do Conhecimento de Ciências Básicas de Oftalmologistas
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Rubens Belfort
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Ophthalmology ,lcsh:Ophthalmology ,lcsh:RE1-994 ,General Medicine
654. Response letter: Serological evidence confirms the presumed diagnosis of Zika virus congenital infection in infants with microcephaly and ocular findings.
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Ventura, Camila V., Maia, Mauricio, Ventura, Bruna V., Linden, Vanessa V. D., Araújo, Eveline B., Ramos, Regina C., Rocha, Maria Angela W., Carvalho, Durce C. G., Jr., Rubens Belfort, and Ventura, Liana O.
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ZIKA virus infections ,MICROCEPHALY ,INFANT disease treatment ,DIAGNOSIS - Abstract
A response from the author of the article about the serological evidence that confirms the presumed diagnosis of Zika virus congenital infection in infants with microcephaly and ocular findings in the previous issue of the journal is presented.
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- 2016
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655. Stem Cell Therapy for Outer Retinal Degenerations
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Rubens Belfort Jr., Full Professor of Ophthalmology
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- 2020
656. Efficacy Study of Triamcinolone Associated With Nepafenac for Treatment of Diabetic Macular Edema (NEVANAC)
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Rubens Belfort Jr. - Full Professor of Ophthalmology
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- 2018
657. Clinical Outcomes After Bilateral Implantation of ZEISS AT LISA TRI AND TRI TORIC IOL
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Instituto Paulista de Estudos e Pesquisa em Oftalmologia, Eye Clinic Day Hospital, São Paulo, and Rubens Belfort Jr., Professor
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- 2017
658. Terapia fotodinâmica com verteporfina associada à injeção intravítrea de antifator de crescimento endotelial vascular para tratamento de hemangioma circunscrito de coroide.
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Geremias Toni, Adriana, Magalhães Passos, Renato, Cerqueira Lima, Guilherme Sturzeneker, and Mattos Neto, Rubens Belfort
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INTRAVITREAL injections , *EYE examination , *PHOTODYNAMIC therapy , *NEOVASCULARIZATION inhibitors , *MEDICAL screening , *POLYPOIDAL choroidal vasculopathy , *EYE diseases - Abstract
Choroid hemangioma is a benign, well-delimited orange-red, vascular tumor characterized by an elevated plaque. It is a rare tumor with a prevalence of one case in every 40 choroidal tumors. It can be diagnosed by the clinic associated with biomicroscopic evaluation and complementary tests to differentiate from other tumors. Treatment can be expectant in asymptomatic cases. For symptomatic cases or those with the presence of subretinal fluid, there are several therapies. The objective of this study was to report a case of circumscribed choroidal hemangioma submitted to combined treatment of photodynamic therapy with verteporfin and intravitreal injection of an antiangiogenic agent (bevacizumab). The decision to treat choroidal hemangioma must be individualized based on symptoms, visual loss, and any potential for recovery. A complete eye examination is necessary, even in asymptomatic cases, for early screening for eye diseases. [ABSTRACT FROM AUTHOR]
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- 2022
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659. Efficacy Study of Triamcinolone and Bevacizumab Intravitreal for Treatment of Diabetic Macular Edema (ATEMD)
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Rubens Belfort Jr., Head Professor
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- 2016
660. Association of Lutein, Zeaxanthin and Brilliant Blue in Chromovitrectomy
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Rubens Belfort Jr., Head Professor of the Departament of Ophthalmology
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- 2016
661. Efficacy of Lutein, Zeaxanthine and Trypan Blue to Stain the Anterior Lens Capsule
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Rubens Belfort Jr., Full Professor of Ophthalmology
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- 2016
662. Safety/Efficacy of Antibiotic Steroid Combination in Treatment of Blepharitis and/or Keratitis and/or Conjunctivitis (BRA-07-02)
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Alcon Research and Rubens Belfort Jr. - Full Professor of Ophthalmology
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- 2011
663. Efficacy/Safety of Antibiotic Steroid Combination in Prevention of Post Operative Inflammation in LASIK Surgery
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Rubens Belfort Jr
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- 2009
664. Efficacy/Safety of Antibiotic Steroid Combination in Prevention of Postoperative Inflammation in Cataract Surgery
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Rubens Belfort Jr
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- 2009
665. Análise integrada de parâmetros clínicos, estruturais e funcionais nas fases aguda e não aguda da doença de Vogt-Koyanagi-Harada: estudo longitudinal
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Viviane Mayumi Sakata, Joyce Hisae Yamamoto, Mauro Goldbaum, Rubens Belfort Mattos Junior, Fernando Oréfice, and Hisashi Suzuki
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OBJETIVO: Descrever prospectivamente o curso da doença de Vogt-Koyanagi-Harada (DVKH) com integração de parâmetros de atividades clínicos, estruturais e funcionais. MÉTODOS: Foram incluídos pacientes com diagnóstico da DVKH na fase aguda (parte I) e não aguda (tempo de doença maior que 12 meses; parte II). Os pacientes na fase aguda receberam tratamento inicial padronizado com pulsoterapia de metilprednisolona seguido de corticoterapia oral em doses lentamente regressivas, pelo período de 15 meses. As avaliações consistiram em exame clínico, retinografia, angiografias com fluoresceína (AGF) e indocianina verde (AIV) e tomografia de coerência óptica (TCO). Foram realizadas nos seguintes momentos: parte I, no diagnóstico e meses 1, 2, 4, 6, 9 e 12; parte II, na inclusão e a cada três meses. Eletrorretinograma campo total (ERGct) e eletrorretinograma multifocal (ERGmf) foram realizados na parte I, no 1.o mês e a cada seis meses e, na parte II, na inclusão e com 12 meses. A leitura dos exames, na parte I, foi efetuada por duas leitoras, não mascaradas; na parte II, foi realizada por três leitores mascarados e treinados, sendo considerada a leitura concordante entre, pelo menos, dois examinadores. As angiografias e TCO foram realizadas no aparelho Spectralis® (HRA+OCT, Heidelberg Engineering). Tratamento adicional com corticoterapia em doses imunossupressoras ou intensificação da imunossupressão sistêmica foi indicado nos casos com recidivas clínicas, na presença de sinais de atividade à AGF ou duas pioras consecutivas >= 30% no ERGct. Os sinais de atividade detectados na AGF, AIV e TCO foram denominados sinais subclínicos. RESULTADOS: Na parte I, foram incluídos nove pacientes (7F/2M) com idade mediana de 33 anos e intervalo mediano entre início dos sintomas e tratamento de 13 dias. Na apresentação inicial, sinais clínicos característicos da doença (coroidite difusa com hiperemia do disco óptico, descolamento seroso de retina e uveíte anterior acompanhados de sinais extraoculares) melhoraram dentro dos primeiros 30 dias em todos os casos. Os principais sinais subclínicos variaram no tempo de melhora ou desaparecimento: espessura de coroide (EC) subfoveal diminuiu para o valor mediano de 347u m aos 30 dias; dark dots diminuíram ao longo do seguimento, porém ainda estavam presentes aos 12 meses. Piora da inflamação foi observada em 17 de 18 olhos no tempo mediano de sete meses quando a redução do corticoide oral atingiu a dose média de 0,3mg/kg/d. Os sinais subclínicos mais frequentemente observados foram dark dots, fuzzy vessels e aumento da EC. Em 10 destes 17 olhos a piora foi acompanhada de queda da função pelo ERG. Três padrões de evolução puderam ser caracterizados: sem recidivas clínicas ou subclínicas (padrão A, 1 olho), com recidivas subclínicas somente (padrão B, 11 olhos) e com recidivas clínicas (padrão C, 6 olhos). Identificou-se que a EC aos 30 dias após início do tratamento >= 506u m teve sensibilidade e especificidade > 80% na detecção dos casos com recidivas clínicas (padrão C). A função pelo ERGct e ERGmf permaneceu alterada em relação ao grupo controle com 24 meses, apesar da melhora progressiva observada desde o início do tratamento. Na análise longitudinal dos pacientes, a função entre 12 e 24 meses permaneceu estável no grupo de doentes que recebeu tratamento adicional (8 olhos), enquanto no grupo que não o recebeu (4 olhos) houve deterioração da função ( < 0,001). Na análise dos grupos segundo padrão de recidiva, observou-se que os olhos com padrão B sem tratamento adicional tinham piora funcional maior em relação àqueles com padrão C ou B tratados (p < 0,001). Na parte II, foram incluídos 20 pacientes (17F/3M), com idade mediana ao diagnóstico de 31 anos, intervalo mediano entre início de sintomas e tratamento de 19 dias e tempo mediano de doença à inclusão de 55 meses. Na avaliação da concordância interobservador na leitura dos sinais subclínicos, EC teve concordância substancial (kappa=0,8), enquanto sinais angiográficos tiveram concordância sutil (kappa < 0,2). O curso da doença em 85% dos pacientes foi com recidiva clínica (padrão C, 11 casos) ou recidiva subclínica (padrão B, 6 casos). Nas 11 avaliações com detecção de células na câmara anterior (CA), sinais subclínicos de inflamação de segmento posterior foram concomitantemente observados em 64% dos olhos. Esta mesma concomitância de sinais subclínicos de inflamação de segmento posterior na presença de células na CA foi observada na parte I do estudo. Nos pacientes com padrão B, a variação da EC foi o principal sinal subclínico observado. A função pelo ERG foi realizada sequencialmente em 13 casos. Olhos com padrão C (7 pacientes), com grande comprometimento funcional desde a inclusão, evoluíram com piora mais acentuada do que aqueles com padrão B (5 pacientes). Ao se individualizar os olhos com padrão B, observou-se que esse diferencial (padrão B melhor que C) devia-se ao grupo padrão B com tratamento (p < 0,001). CONCLUSÕES: Neste estudo prospectivo de pacientes com DVKH em seguimento mínimo de 12 meses, desde as fases aguda e não aguda, três padrões de evolução foram observados, sendo que 94% (parte I) e 85% (parte II) dos pacientes apresentaram recidiva/piora clínica (padrão C) e/ou subclínica (padrão B). Na parte I do estudo, a piora da inflamação foi detectada aos sete meses de evolução durante dose regressiva do corticoide equivalente a 0,3mg/kg/d, apesar do tratamento inicial com corticoides em altas doses lentamente regressivo. A EC aferida 30 dias após o início do tratamento acima de 506 ?m mostrou-se um fator com sensibilidade e especificidade acima de 80% na identificação dos casos que evoluíram com recidivas clínicas. Dentre os sinais para detecção de inflamação subclínica, as alterações na EC são confiáveis, enquanto que sinais angiográficos devem ser interpretados com cautela. Exames sequenciais tornam a leitura mais confiável. A presença de células na CA comportou-se como a \"ponta do iceberg\" de uma inflamação mais difusa. O estudo eletrorretinográfico demonstrou resultado subnormal mesmo após 24 meses de seguimento na parte I; tratamento adicional pode evitar piora funcional nos pacientes com sinais subclínicos de inflamação. A pior função da retina em pacientes com inflamação clínica (padrão C) da parte II e dos pacientes com inflamação subclínica (padrão B) de ambas as partes do estudo sugerem que o tratamento ideal das recidivas inflamatórias ainda deve ser alvo de futuros estudos OBJECTIVES: To describe the course of Vogt-Koyanagi-Harada disease (VKHD) prospectively, integrating clinical, structural and functional parameters. METHODS: Patients with VKHD in the acute (part I) and non-acute (more than 12 months from diagnosis) phases (part II) were included. Patients in the acute phase received a standard treatment with methylprednisolone pulsetherapy followed by high-dose oral corticosteroids with slow tapering during 15 months. Evaluations included clinical exams, fluorescein (FA) and indocyanine green (ICGA) angiographies and optical coherence tomography (OCT). In part I, they were performed at inclusion, then after 1,2,4,6,9,and 12 months; in part II, they were performed at inclusion then every 3 months for up to 12 months. Functional evaluation using electroretinography (ERG) was performed at inclusion and every 6 months in part I and at inclusion and at 12 months in part II. Two non-blinded readers analyzed the imaging exams in part I. In part II, three trained and blinded-readers performed the imaging exams analysis. For study`s purpose, at least two concordant readings were considered. Imaging exams utilized the Spectralis® (HRA+OCT, Heidelberg engineering). Inflammatory signs detected on FA, ICGA and OCT were denominated as subclinical signs. Additional treatment with high doses of corticosteroids or more intensive systemic immunosuppression was indicated in cases with clinical signs of inflammation, with subclinical signs on FA or with two consecutive worsening > 30% on ERG. RESULTS: Nine patients (7F/2M) were included in part I; median age was 33 years old and median time elapsed from onset of symptoms to treatment was 13 days. At disease presentation, classic signs (choroiditis, anterior uveitis, serous retinal detachment, optic disc hyperemia and extraocular manifestations) were observed; they improved in 30 days after treatment. Subclinical signs improved in variable periods of time: subfoveal choroidal thickness (CT) decreased to a median value of 347 ?m, 30 days after the beginning of treatment, dark dots diminished during the follow-up but they were still observed at 12 months. Relapse (worsening of inflammation) was noticed in 17 of 18 eyes at a median follow up time of seven months, when tapering schedule corticosteroid dosage reached the mean dose of 0.3mg/kg/d of prednisone. Dark dots, fuzzy vessels and choroid thickening were the most frequent subclinical signs. Relapses in 10 of 17 eyes were concomitant with worsening on ERG. Three patterns of evolution could be delineated: no signs of inflammation (pattern A, 1 eye), only subclinical signs of inflammation (pattern B, 11 eyes) and clinical signs of inflammation (pattern C, 6 eyes). CT>=506 ?m 30 days after the beginning of treatment was more than 80% sensitive and specific to detect more severe cases (pattern C). ERG parameters at 24 months were subnormal as compared to the control group, despite improvement during follow-up. Further long-term results after 24 month demonstrated stabilization of ERG parameters in patients that had received additional treatment, whereas there was worsening in those patients who had not received additional treatment (p= 506 ?m had a greater than 80% sensitivity and specificity to detect cases with pattern C evolution. Considering subclinical signs, CT increase reliably detected recurrence, whereas angiographic signs required cautious interpretation. Sequential analysis was more conclusive than an isolated exam. Anterior chamber cells seemed to be the \"tip of the iceberg\" of a more diffuse inflammation. ERG analysis was subnormal even after 24 months of follow up since disease onset; additional treatment could prevent functional worsening in patients with subclinical signs of inflammation. Worse retinal function in patients with clinical recurrences (pattern C) in part II and subclinical recurrences (pattern B) in parts I and II suggest that ideal treatment of recurrences should be further pursued
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- 2016
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666. Study and development of an iridium-192 seed for use in ophthalmic cancer
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Fabio Rodrigues de Mattos, Maria Elisa Chuery Martins Rostelato, Rubens Belfort Mattos Neto, and Carlos Alberto Zeituni
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Gynecology ,Physics ,medicine.medical_specialty ,radiation source implants ,brachytherapy ,neoplasms ,medicine ,brazilian cnen ,eyes ,sealed sources ,iridium 192 - Abstract
Mesmo não estando entre os casos de câncer com maior incidência, os tumores oculares têm acometido a população brasileira. O Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP), juntamente à Escola Paulista de Medicina (UNIFESP), criou um projeto que visa o desenvolvimento e implementação de um tratamento de câncer oftálmico alternativo que consiste na utilização de sementes de irídio-192 em braquiterapia. O Projeto surgiu pelo motivo da Escola Paulista tratar muitos casos oncológicos no âmbito do Sistema Único de Saúde (SUS) e pela experiência em pesquisas de fontes radioativas seladas do grupo de braquiterapia do IPEN. A metodologia foi desenvolvida a partir da infraestrutura disponível e pela experiência dos pesquisadores. O protótipo desenvolvido da semente se apresenta com um núcleo (irídio em liga de irídio-platina) de 3,0mm de comprimento selado por uma cápsula de titânio de 0,8mm de diâmetro externo, 0,05mm de espessura de parede e 4,5mm de comprimento. Nenhum estudo sobre a confecção destas sementes foi encontrado em literatura disponível. Criou-se uma metodologia que envolveu: caracterização do fio, criação do dispositivo para ativação neutrônica dos núcleos e testes de estanqueidade da fonte produzida. A análise dos resultados comprovaram a viabilidade do método. Como sugestão para trabalhos futuros, estudos quanto à metrologia e dosimetria destas fontes e aprimoramento da metodologia devem ser realizados, para uma futura implementação em caráter nacional. Even ocular tumors are not among the cases with a higher incidence, they affect the population, especially children. The Institute of Energy and Nuclear Research (IPEN-CNEN/SP) in partnership with Escola Paulista de Medicina (UNIFESP), created a project to develop and implement a alternative treatment for ophthalmic cancer that use brachytherapy iridium-192 seeds. The project arose by reason of the Escola Paulista treat many cancer cases within the Unified Health System (SUS) and the research experience of sealed radioactive sources group at IPEN. The methodology was developed from the available infrastructure and the experience of researchers. The prototype seed presents with a core (192-iridium alloy of iridium-platinum) of 3.0 mm long sealed by a capsule of titanium of 0.8 mm outside diameter, 0.05 mm wall thickness and 4,5mm long. This work aims to study and develop a seed of iridium-192 from a platinum-iridium alloy. No study on the fabrication of these seeds was found in available literature. It was created a methodology that involved: characterization of the material used in the core, creation of device for neutron activation irradiationand ans seed sealing tests. As a result, proved the feasibility of the method. As a suggestion for future work, studies regarding metrology and dosimetry of these sources and improvement of the methodology should be carried out, for future implementation in national scope.
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- 2015
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667. Multicenter randomized clinical trial to assess the effectiveness of intra-vitreous injections of bevacizumab, triamcinolone or their combination in the treatment of diabetic macular edema
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Oliveira Neto, Hermelino Lopes de [UNIFESP], Universidade Federal de São Paulo (UNIFESP), and Mattos Junior, Rubens Belfort [UNIFESP]
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anti-angiogenic vegf ,diabetic retinopathy ,macular edema ,diabetes ,bevacizumabe ,triancinolona ,antiangiogênicos anti-vegf ,edema macular ,retinopatia diabética ,triamcinolone ,diabetic macular edema ,avastin ,edema macular diabético - Abstract
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Nos diabéticos, calcula-se que o risco de cegueira seja vinte vezes maior do que na população em geral e que aproximadamente 19% dos casos de cegueira no mundo sejam causados por Diabetes Mellitus (DM). No Brasil, a retinopatia diabética (RD), uma complicação microvascular específica causada pelo DM, está entre as principais causas de cegueira irreversível, atingindo 7,6% da população segundo o Ministério da Saúde, sendo esta doença responsável por 4,6% das deficiências visuais graves. O edema macular diabético (EMD) é o principal mecanismo de perda da visão em pacientes com RD não proliferativa. O EMD decorre da formação de microaneurismas, alterações da barreira hemato-retiniana, aumento da expressão de fatores inflamatórios e angiogênicos que promovem alteração da permeabilidade vascular e consequente vazamento de fluido e de lipídeos para a retina. O tratamento do EMD inclui a fotocoagulação com raio laser, injeção intravítrea de anti-angiogênicos ou esteróides. O objetivo deste estudo foi avaliar e comparar a eficácia e os efeitos adversos de injeções intravítreas de bevacizumabe, de triancinolona ou de sua combinação no tratamento do edema macular diabético clinicamente significante por meio de exames de acuidade visual, de medidas da espessura macular central e da pressão intraocular (PIO). Foram incluídos neste estudo, 142 pacientes com RD e EMD clinicamente significante, provenientes de oito cidades brasileiras, acompanhados por 24 semanas. O estudo foi randomizado e duplo-cego. Os pacientes foram submetidos a exame oftalmológico e tomografia de coerência óptica (OCT), sendo divididos em três grupos de tratamento: (1) BEVACIZUMABE (BEVA)1,25mg/0,05 ml; (2) TRIANCINOLONA (TAAC)-4mg/0,1ml; (3) BEVA+TAAC. A idade média obtida foi de 58,8 anos para o grupo BEVA, 57,1 anos para o grupo TAAC e 61 anos para o grupo BEVA+TAAC (p=0,716). Observou-se melhora estatisticamente significativa da acuidade visual (> 4 linhas) em todos os grupos, comparando-se os resultados da semana 24 com os da visita inicial (baseline). Na semana 24 não houve diferença significativa entre os grupos (p=0,436) em relação a acuidade visual. Observou-se redução da espessura macular nos três grupos (BEVA=103?m, TAAC=160?m, BEVA+TAAC= 125 ?m), sendo que o grupo TAAC apresentou espessura significantemente menor (247 ?m) do que o grupo BEVA (287 ?m). Em todos os grupos, houve aumento da PIO, sendo que o grupo TAAC apresentou maior valor médio de PIO em todo o período do estudo (18 mmHg). O número médio de injeções foi maior no grupo BEVA (3,2 injeções), seguido do grupo BEVA+TAAC (2,4 injeções) e TAAC (2,1 injeções). Nenhum efeito adverso grave foi registrado. Não se revelaram diferenças significativas nas medidas de PIO, AV e espessura macular do grupo BEVA+TAAC em relação ao tratamento isolado com uma das drogas. In diabetic patients, it is estimated that the risk of blindness is twenty times higher than the normal population and approximately 19% of blindness in the world are caused by diabetes mellitus (DM). In Brazil, diabetic retinopathy (DR), a specific microvascular complication, is among the leading causes of irreversible blindness, affecting 7.6% of the population according to the Ministry of Health, and this disease accounts for 4.6% of severe visual impairments. The diabetic macular edema (EMD) is the primary mechanism for vision lossin patients with non-proliferative DR. It arises due to secondary formation of micro aneurysms, changes in the blood-retinal barrier, increasedinflammation and angigenic factors that promote increase in thevascular permeability abd consequent leakage of fluid and lipids to the retina. The EMD treatment includes laser photocoagulation, intravitreal injection of anti-angiogenic drugs or steroids.The aim of this study was to evaluate and compare the efficacy and adverse effects of intravitreous injections of bevacizumab, triancinolone or their combination in the treatment of clinically significant diabetic macular edema through tests of visual acuity and IOP measurements and central macular thickness. This study included142 patients with diabetic retinopathy and clinically significant macular edema from eight cities. It is a randomized, multicenter and masked study. Patients underwent ophthalmologic examination and optical coherence tomography (OCT). Afterwards they were divided into three treatment groups: (1) Bevacizumab-1.25mg /0.05ml; (2) triamcinolone-4mg /0.1ml; (3) Bevacizumab+triancinolone. The obtained average age was 58.8 years for the BEVACIZUMABE group, 57.1 years for the TRIANCINOLONE group and 61years for BEVACIZUMABE+TRIANCINOLONE group(p =0.716). We observed statistically significant improvement in visual acuity (>4lines) in all groups, comparing the results of week 24 with the baseline visit. At week 24 there was no significant difference in the visual acuity between the 3 groups (p =0.436). It was observed reduction in macular thickness in all thegroups (BEVACIZUMABE=103?m, TRIANCINOLONE=160 micrometres BEVACIZUMABE TRIANCINOLONE+=125um), and the TRIANCINOLONE group showed significantly less thick(247 microns) than the bevacizumab group (287 microns). In all groups, there was an IOP increase, and the TRIANCINOLONE group had higher mean value of IOP throughout the study period (18 mmHg) .The average number of injections was higher in the BEVACIZUMABE group (3.2 injections), followed by BEVACIZUMABE+TRIAMCINOLONE (2.4 injections) and TRIANCINOLONA (2.1injections) group.In this investigation no severe adverse event was observed. At the end of the study, there was no significant difference between the groups regarding the visual acuity, intraocular pressure and central macular thickness. Dados abertos - Sucupira - Teses e dissertações (2013 a 2016)
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- 2015
668. The effects of the subconjunctival injection of bevacizumab (Avastin®) on angiogenesis and metalloproteinases activities in the rat cornea
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Luiz Felipe de Moraes Barros, Rubens Belfort Junior, Silvya Stuchi Maria Engler, and José Luiz Guerra
- Abstract
O objetivo do presente trabalho foi avaliar a influência da aplicação de bevacizumab (Avastin®) sobre a angiogênese corneal. Para tanto ratos Wistar, machos, com idade entre 8 e 10 semanas, pesando 300 a 350g, foram submetidos a cauterização química com nitrato de prata por 10 segundos. Após realização da lesão, cada grupo de 5 animais foi tratado com injeções subconjuntivais de 0,02 ml de bevacizumab (Avastin ®) pela via subconjuntival no momento da lesão, no 3° e 5° dia e submetidos à eutanásia ao 7° dia após cauterização corneal. A rede vascular neoformada foi quantificada após preenchimento do leito vascular com Tinta da China e análise das imagens em sistema computadorizado (Image Pro-Plus®). Para a segunda etapa do experimento, avaliou-se a atividade das metaloproteinases MMP-2 e MMP-9 utilizando-se do mesmo modelo de angiogênese e dos mesmos tempos de tratamento. Transcorridos 7 dias de lesão corneal os animais foram eutanasiados e suas córneas submetidas a zimografia. Os resultados mostraram haver uma inibição da angiogênese quando se compara o grupo controle aos grupos tratados nos diferentes períodos de tempo. Quando a densidade vascular é comparada entre os tempos de aplicação, não se observa diferença estatisticamente significante. Estes resultados em conjunto indicam que o tempo de aplicação não influencia a inibição da angiogênese e que o bevacizumab foi eficiente na redução da formação de vasos quando se compara a densidade vascular do grupo controle. O modelo experimental produziu considerável aumento das metaloproteinases MMP-2 e MMP-9. Houve uma tendência a diminuição da atividade das MMPs quando bevacizumab foi aplicado no momento da lesão e quando foi aplicado ao 3° dia após cauterização. A atividade das MMPs mostrou-se aumentada quando o tratamento foi realizado no 5° dia. Desta forma pode-se concluir que o bevacizumab foi capaz de inibir a angiogênese corneal, independentemente do período de tratamento e ainda que houve uma tendência a redução da atividade das MMPs carecendo, por enquanto, de mais investigações que possam elucidar a interação deste fármaco com a inibição de sua atividade. The purpose of this study was to evaluate the effects of the use of the subconjunctival injection of bevacizumab (Avastin®) on angiogenesis and metalloproteinases activities in the rat cornea after cauterization. Wistar male rats, aging 8 to 10 weeks, were used. The animals were divided in four groups: control group (GC) that received subconjunctivally 0,02 ml of 0,9% saline solution; group GO that received subconjunctivally 0,02 ml of bevacizumab just after the lesion; group G3 that received bevacizumab at day 3 after lesion and G5 that received bevacizumab at day 5 after lesion. The animals were euthanized at day 7 after lesion. The new formed vessels were quantified after the China Ink perfusion and photographs were obtained and analyzed in computadorized system (Image Pro-Plus®). The activities of metalloproteinases MMP-2 and MMP-9 were evaluated by zimography in a pool of corneas obtained from animals submitted to the same model and treatment schedule. The results showed an inhibition of angiogesenis when the control group were compared with all treated groups. There were no statistic differences when vascular density was compared between the treated groups. These results may indicate that bevacizumab was able to inhibit corneal angiogenesis and that there was no influence of the injection day. This angiogenesis model promoted an increase of matrix metalloproteinases MMP-2 and MMP-9 activity. Zymography also showed a slight reduction in matrix metalloproteinases activity when bevacizumab were administrated at the injury moment and most significant at day 3. At day 5 zymography showed an increase of the activity of these metalloproteinases. Together these results may indicate that the subconjunctival injection of bevacizumab may have a therapeutic potential as an antiangiogenic agent and that matrix metalloproteinases activity decreased, but not at significant levels, demanding more investigations regarding to the interaction of bevacizumab and activity of matrix metalloproteinases.
- Published
- 2006
669. Toluidine blue 1% eye drop versus optical coherence tomography for margin delimitation of ocular surface squamous neoplasia.
- Author
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Ferraz FB, Castelo Branco AMP, da Cruz LGI, Fernandes BF, Morales MC, Neto RB, and Fernandes AG
- Subjects
- Humans, Female, Male, Middle Aged, Aged, Carcinoma, Squamous Cell diagnostic imaging, Carcinoma, Squamous Cell pathology, Adult, Aged, 80 and over, Anterior Eye Segment diagnostic imaging, Anterior Eye Segment pathology, Tomography, Optical Coherence methods, Tolonium Chloride, Conjunctival Neoplasms diagnostic imaging, Conjunctival Neoplasms pathology, Ophthalmic Solutions, Coloring Agents administration & dosage
- Abstract
Purpose: To compare the use of toluidine blue 1% eye drops with anterior segment optical coherence tomography (OCT) for the determination of tumour margins in patients with ocular surface squamous neoplasia (OSSN)., Methods: The study was conducted from July 2020 to June 2021 at the Ocular Oncology department at the Federal University of São Paulo, Brazil. Slit-lamp photographs after toluidine blue staining and OCT of the anterior segment were taken on the same day from patients with OSSN. Photographs and OCT images were analyzed quantitatively using the software ImageJ and IMAGEnet®, respectively. The agreement between techniques was evaluated qualitatively through the Bland-Altman graph and quantitatively through intraclass correlation (ICC)., Results: A total of 21 participants (71.43% males) with a clinical diagnosis of OSSN were included in the study. The average + SD diameter along the chosen axes was 4.43 ± 2.08 mm with OCT of 4.37 ± 2.03 mm with toluidine blue, a difference not statistically significant (p = 0.2891). The Bland-Altman analysis indicated a good qualitative agreement between the methods, with all cases inserted within the limits of agreement from -0.3217 to 0.4268. The ICC quantitative analysis showed an almost perfect agreement of 99.57% (95%CI: 98.96-99.83%; p < 0.001)., Conclusions: Our findings showed that OCT and toluidine eye drops are equivalent in determining margins for tumour measurements, which is particularly relevant in low-income settings where anterior segment OCT is not available. The use of toluidine blue 1% could be an useful alternative to quantify the size of the tumour, help to monitor tumour growth, and outline margins for surgical planning., Competing Interests: Declaration of conflicting interestsThe authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
- Published
- 2024
- Full Text
- View/download PDF
670. Brazilian guidelines for the treatment of outpatients with suspected or confirmed COVID-19. A joint guideline of the Brazilian Association of Emergency Medicine (ABRAMEDE), Brazilian Medical Association (AMB), Brazilian Society of Angiology and Vascular Surgery (SBACV), Brazilian Society of Geriatrics and Gerontology (SBGG), Brazilian Society of Infectious Diseases (SBI), Brazilian Society of Family and Community Medicine (SBFMC), and Brazilian Thoracic Society (SBPT).
- Author
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Falavigna M, Belli KC, Barbosa AN, Zavascki AP, Nastri ACSS, Santana CM, Stein C, Gräf DD, Cadegiani FA, Guimarães HP, Monteiro JT, Ferreira JC, de Azevedo LCP, Magri MMC, Sobreira ML, Dias MBGS, de Oliveira MS, Corradi MFDB, Rosa R, Heinzelmann RS, da Silva RM, Junior RB, Cimerman S, Colpani V, Veiga VC, and de Carvalho CRR
- Subjects
- Azithromycin, Brazil, Community Medicine, Humans, Immunization, Passive, Outpatients, Vascular Surgical Procedures, COVID-19 Serotherapy, COVID-19 therapy, Cardiology, Communicable Diseases, Emergency Medicine, Geriatrics, COVID-19 Drug Treatment
- Abstract
Background: Several therapies have been used or proposed for the treatment of COVID-19, although their effectiveness and safety have not been properly evaluated. The purpose of this document is to provide recommendations to support decisions about the drug treatment of outpatients with COVID-19 in Brazil., Methods: A panel consisting of experts from different clinical fields, representatives of the Brazilian Ministry of Health, and methodologists (37 members in total) was responsible for preparing these guidelines. A rapid guideline development method was used, based on the adoption and/or adaptation of recommendations from existing international guidelines combined with additional structured searches for primary studies and new recommendations whenever necessary (GRADE-ADOLOPMENT). The rating of quality of evidence and the drafting of recommendations followed the GRADE method., Results: Ten technologies were evaluated, and 10 recommendations were prepared. Recommendations were made against the use of anticoagulants, azithromycin, budesonide, colchicine, corticosteroids, hydroxychloroquine/chloroquine alone or combined with azithromycin, ivermectin, nitazoxanide, and convalescent plasma. It was not possible to make a recommendation regarding the use of monoclonal antibodies in outpatients, as their benefit is uncertain and their cost is high, with limitations of availability and implementation., Conclusion: To date, few therapies have demonstrated effectiveness in the treatment of outpatients with COVID-19. Recommendations are restricted to what should not be used, in order to provide the best treatment according to the principles of evidence-based medicine and to promote resource savings by aboiding ineffective treatments., Competing Interests: Conflicts of interest The list of participants and the declaration of conflicts of interest are presented in the Supplementary Material., (Copyright © 2022 Sociedade Brasileira de Infectologia. Published by Elsevier España, S.L.U. All rights reserved.)
- Published
- 2022
- Full Text
- View/download PDF
671. Diabetic retinopathy classification for supervised machine learning algorithms.
- Author
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Nakayama LF, Ribeiro LZ, Gonçalves MB, Ferraz DA, Dos Santos HNV, Malerbi FK, Morales PH, Maia M, Regatieri CVS, and Mattos RB Jr
- Abstract
Background: Artificial intelligence and automated technology were first reported more than 70 years ago and nowadays provide unprecedented diagnostic accuracy, screening capacity, risk stratification, and workflow optimization. Diabetic retinopathy is an important cause of preventable blindness worldwide, and artificial intelligence technology provides precocious diagnosis, monitoring, and guide treatment. High-quality exams are fundamental in supervised artificial intelligence algorithms, but the lack of ground truth standards in retinal exams datasets is a problem., Main Body: In this article, ETDRS, NHS, ICDR, SDGS diabetic retinopathy grading, and manual annotation are described and compared in publicly available datasets. The various DR labeling systems generate a fundamental problem for AI datasets. Possible solutions are standardization of DR classification and direct retinal-finding identifications., Conclusion: Reliable labeling methods also need to be considered in datasets with more trustworthy labeling., (© 2021. The Author(s).)
- Published
- 2022
- Full Text
- View/download PDF
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