Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 34
Filtrar
1.
Rev. cuba. oftalmol ; 35(1): e1303, ene.-mar. 2022. graf
Artigo em Espanhol | LILACS, CUMED | ID: biblio-1409033

RESUMO

La retinopatía de la prematuridad es una enfermedad dinámica vasoproliferativa de la retina inmadura postnatal que afecta a los bebés prematuros. Cuando aparecen signos de atipicidad en su diagnóstico o evolución deben descartarse otras entidades vasculares de la retina, que generalmente tienen un trasfondo genético y semejan o coexisten con dicha entidad. Se presenta un caso con características de Retinopatía del prematuro y algunos signos de atipicidad. Se describe su manejo y evolución, así como una breve descripción de las entidades que conforman el diagnóstico diferencial(AU)


Retinopathy of prematurity is a dynamic vasoproliferative disease of the immature postnatal retina that affects premature babies. When signs of atypicality appear in its diagnosis or evolution, other vascular entities of the retina must be ruled out, which generally have a genetic background and resemble or coexist with said entity. We present a case with characteristics of Retinopathy of prematurity and some signs of atypicality. Its management and evolution are described, as well as a brief description of the entities that make up the differential diagnosis(AU)


Assuntos
Humanos , Masculino , Recém-Nascido , Retinopatia da Prematuridade/diagnóstico , Diagnóstico Diferencial , Retina
2.
iScience ; 24(11): 103260, 2021 Nov 19.
Artigo em Inglês | MEDLINE | ID: mdl-34765910

RESUMO

Spermidine (Spd) is a nitrogen sink and signaling molecule that plays pivotal roles in eukaryotic cell growth and must be finetuned to meet various energy demands. In eukaryotes, target of rapamycin (TOR) is a central nutrient sensor, especially N, and a master-regulator of growth and development. Here, we discovered that Spd stimulates the growth of maize and Arabidopsis seedlings through TOR signaling. Inhibition of Spd biosynthesis led to TOR inactivation and growth defects. Furthermore, disruption of a TOR complex partner RAPTOR1B abolished seedling growth stimulation by Spd. Strikingly, TOR activated by Spd promotes translation of key metabolic enzyme upstream open reading frame (uORF)-containing mRNAs, PAO and CuAO, by facilitating translation reinitiation and providing feedback to polyamine metabolism and TOR activation. The Spd-TOR relay protected young-age seedlings of maize from expeditious stress heat shock. Our results demonstrate Spd is an upstream effector of TOR kinase in planta and provide its potential application for crop protection.

3.
JAMA Oncol ; 6(5): 685-695, 2020 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-32105305

RESUMO

Importance: Early diagnosis of retinoblastoma, the most common intraocular cancer, can save both a child's life and vision. However, anecdotal evidence suggests that many children across the world are diagnosed late. To our knowledge, the clinical presentation of retinoblastoma has never been assessed on a global scale. Objectives: To report the retinoblastoma stage at diagnosis in patients across the world during a single year, to investigate associations between clinical variables and national income level, and to investigate risk factors for advanced disease at diagnosis. Design, Setting, and Participants: A total of 278 retinoblastoma treatment centers were recruited from June 2017 through December 2018 to participate in a cross-sectional analysis of treatment-naive patients with retinoblastoma who were diagnosed in 2017. Main Outcomes and Measures: Age at presentation, proportion of familial history of retinoblastoma, and tumor stage and metastasis. Results: The cohort included 4351 new patients from 153 countries; the median age at diagnosis was 30.5 (interquartile range, 18.3-45.9) months, and 1976 patients (45.4%) were female. Most patients (n = 3685 [84.7%]) were from low- and middle-income countries (LMICs). Globally, the most common indication for referral was leukocoria (n = 2638 [62.8%]), followed by strabismus (n = 429 [10.2%]) and proptosis (n = 309 [7.4%]). Patients from high-income countries (HICs) were diagnosed at a median age of 14.1 months, with 656 of 666 (98.5%) patients having intraocular retinoblastoma and 2 (0.3%) having metastasis. Patients from low-income countries were diagnosed at a median age of 30.5 months, with 256 of 521 (49.1%) having extraocular retinoblastoma and 94 of 498 (18.9%) having metastasis. Lower national income level was associated with older presentation age, higher proportion of locally advanced disease and distant metastasis, and smaller proportion of familial history of retinoblastoma. Advanced disease at diagnosis was more common in LMICs even after adjusting for age (odds ratio for low-income countries vs upper-middle-income countries and HICs, 17.92 [95% CI, 12.94-24.80], and for lower-middle-income countries vs upper-middle-income countries and HICs, 5.74 [95% CI, 4.30-7.68]). Conclusions and Relevance: This study is estimated to have included more than half of all new retinoblastoma cases worldwide in 2017. Children from LMICs, where the main global retinoblastoma burden lies, presented at an older age with more advanced disease and demonstrated a smaller proportion of familial history of retinoblastoma, likely because many do not reach a childbearing age. Given that retinoblastoma is curable, these data are concerning and mandate intervention at national and international levels. Further studies are needed to investigate factors, other than age at presentation, that may be associated with advanced disease in LMICs.


Assuntos
Retinoblastoma/economia , Retinoblastoma/epidemiologia , Pré-Escolar , Feminino , Humanos , Lactente , Masculino
4.
Sensors (Basel) ; 18(8)2018 Aug 07.
Artigo em Inglês | MEDLINE | ID: mdl-30087303

RESUMO

This paper proposes a new communication protocol for output-feedback control through multi-hop Wireless Sensor Network (WSN). The protocol is based on a Hop-by-Hop transport scheme and is especially devised to simultaneously fulfill two conflicting criteria: the network energy consumption and the stability/performance (in terms of H∞ norm) of the closed-loop system. The proposed protocol can be implemented by means of three heuristics, basically using distinct rules to control the maximum number of retransmissions allowed in terms of the voltage level of the batteries of the network nodes. As another contribution, a Markov jump based representation is proposed to model the packet loss in the communication channel, giving rise to a systematic procedure to determine the transition probability matrix and the Markov chain operation modes of a network with multiple information sources. The synthesis of the output-feedback controller is made in two steps (observer filter plus a state-feedback controller) for the Markov model assuming partial availability of the operation modes. The efficiency and applicability of the communication protocol is illustrated by means of a numerical experiment, based on a physical model of a coupled tanks plant. The features of each heuristic of implementation of the proposed protocol are presented in the numerical comparisons.

5.
Rev. cuba. oftalmol ; 31(1): 170-177, ene.-mar. 2018. ilus
Artigo em Espanhol | LILACS | ID: biblio-960641

RESUMO

El retinoblastoma es el tumor intraocular maligno más frecuente en la niñez y representa alrededor del 4 por ciento de todos los cánceres de esta etapa de la vida y menos del 1 por ciento en general. Este reporte describe la presentación tardía de retinoblastoma en forma de panuveítis en un adolescente de 11 años, diagnosticado inicialmente como toxocariasis ocular. Esta enfermedad es rara en pacientes mayores de 8 años, pero tiene que ser incluida como diagnóstico diferencial. El diagnóstico tardío o erróneo constituye un riesgo para la vida y peor pronóstico visual(AU)


Retinoblastoma is the most common malignant intraocular tumor in childhood, representing about 4 percent of all cancers at that stage of life and 1 percent in general. A description is provided of a late-onset panuveitic retinoblastoma in an 11-year-old male patient initially diagnosed with ocular toxocariasis. The disease is rare in people over 8 years of age, but it should be included in the differential diagnosis. Late or mistaken diagnosis constitutes a risk to life and a worse visual prognosis(AU)


Assuntos
Humanos , Masculino , Criança , Retinoblastoma/diagnóstico por imagem , Enucleação Ocular/métodos , Diagnóstico Diferencial , Toxocaríase/terapia , Diagnóstico Precoce
6.
Rev. cuba. oftalmol ; 31(1): 170-177, ene.-mar. 2018. ilus
Artigo em Espanhol | CUMED | ID: cum-73354

RESUMO

El retinoblastoma es el tumor intraocular maligno más frecuente en la niñez y representa alrededor del 4 por ciento de todos los cánceres de esta etapa de la vida y menos del 1 por ciento en general. Este reporte describe la presentación tardía de retinoblastoma en forma de panuveítis en un adolescente de 11 años, diagnosticado inicialmente como toxocariasis ocular. Esta enfermedad es rara en pacientes mayores de 8 años, pero tiene que ser incluida como diagnóstico diferencial. El diagnóstico tardío o erróneo constituye un riesgo para la vida y peor pronóstico visual(AU)


Retinoblastoma is the most common malignant intraocular tumor in childhood, representing about 4 percent of all cancers at that stage of life and 1 percent in general. A description is provided of a late-onset panuveitic retinoblastoma in an 11-year-old male patient initially diagnosed with ocular toxocariasis. The disease is rare in people over 8 years of age, but it should be included in the differential diagnosis. Late or mistaken diagnosis constitutes a risk to life and a worse visual prognosis(AU)


Assuntos
Humanos , Masculino , Criança , Retinoblastoma , Enucleação Ocular/métodos , Diagnóstico Diferencial , Toxocaríase/terapia , Diagnóstico Precoce
7.
Univ. med ; 59(4): 1-5, 2018. ilus
Artigo em Espanhol | LILACS, COLNAL | ID: biblio-995624

RESUMO

La neumoconiosis es una patología pulmonar crónica producida por el daño tisular que originan algunos tóxicos al ser inhalados durante ciertos periodos. El caso presentado corresponde a un paciente inmunocompetente con silicoantracosis, un tipo de neumoconiosis, en quien se detecta infección pulmonar por Mycobacterium nonchromogenicum en un centro de atención primaria en Bogotá, Colombia, poco común y de gran interés médico.


Pneumoconiosis is a chronic lung disease, caused by the inhalation of toxins that produces lung tissue damage; one type of pneumoconiosis is silicoanthracosis. In this reported case, we described an immunocompetent patient that has a pulmonary infection by Mycobacterium nonchromogenicum at a primary care center in Bogotá, Colombia; being an unusual case.


Assuntos
Humanos , Micobactérias não Tuberculosas , Pneumoconiose , Atenção Primária à Saúde
8.
In. Rio Torres, Marcelino; Fernández Argones, Liamet; Hernández Silva, Juan Raúl; Ramos López, Meisy. Oftalmología. Diagnóstico y tratamiento. 2da edición. La Habana, Editorial Ciencias Médicas, 2 ed; 2018. , graf.
Monografia em Espanhol | CUMED | ID: cum-71380

Assuntos
Humanos , Retinoblastoma
9.
Rev. habanera cienc. méd ; 16(5): 751-760, set.-oct. 2017. ilus
Artigo em Espanhol | LILACS, CUMED | ID: biblio-901767

RESUMO

Introducción: El Síndrome de Von Hippel Lindau es una afección neoplásica multisistémica, heredada de manera autosómica dominante y con alta penetrancia. Su expresividad clínica es muy diversa,oscilando la incidencia entre 1/35000 y 1/36000 nacidos vivos. Esta enfermedad usualmente se diagnostica entre los 20 y 30 años, pero los síntomas pueden aparecer en la infancia. La lesión clínica inicial más común y precoz es el hemangioblastoma de la retina y/o del sistema nervioso central. Objetivo: Presentar un caso de un paciente con carcinomas renales múltiples como manifestación inicial de un Síndrome de Von Hippel Lindau. Presentación del Caso: Paciente masculino de 59 años, con antecedentes de salud, quien acude a urgencias por cuadro febril de 3 días de evolución, que fue interpretado como Dengue; se le realizó, dentro de los complementarios, ultrasonido abdominal, donde se descubrió masa sólida a nivel del polo superior del riñón derecho, asociado a existencia de otra en polo inferior de este mismo riñón, así como de 2 más en el contralateral. Además, se encontraron varios quistes pancreáticos y 2 renales izquierdos corticales. El paciente fue intervenido quirúrgicamente; se corroboró el diagnóstico de carcinomas renales de células claras. El examen oftalmológico reveló la presencia de un hemangioblastoma retiniano derecho; en tanto la tomografía computarizada simple de cráneo y la resonancia magnética espinal no mostraron alteraciones. Conclusiones: Este síndrome es una rara, pero grave afección genética, caracterizada por un alto riesgo de desarrollar enfermedades neoplásicas, lo que hace que sea aún más importante conocerlo, para poder identificar y tratar a tiempo sus temidas complicaciones(AU)


Introduction: Von Hippel Lindau Syndrome is a multisystem neoplastic affection, which is inherited as an autosomal dominant trait, with high penetrance. Its clinical expressivity is very diverse, ranging its incidence between 1/35000 and 1/36000 born alive. This disease is usually diagnosed between the 20 and 30 years of age, but its symptoms can appear in childhood. The most common and early initial clinical lesion is the hemangioblastoma of the retina and/or central nervous system. Objective:To present a case of a patient with multiple renal carcinoma as initial manifestation of Von Hippel Lindau Syndrome. Case presentation: 59 years old male patient with a history of good health who comes to the Emergency Room because of febrile clinical state of 3 days´ evolution, that was interpreted as dengue. Abdominal ultrasound was included in the complementary studies, in which a solid mass at level of upper pole of right kidney was observed, associated with the existence of another one in lower pole of the same kidney, as well as two others in contralateral. Also, multiple pancreatic cysts and two left cortical renal ones were found. The patient underwent surgery, and the diagnosis of clear cells renal carcinoma was corroborated. The ophthalmological exam revealed the presence of a right retinal hemangioblastoma whereas the plain skull CT-scan, and the magnetic resonance imaging of the lumbar spine did not show any alterations. Conclusions:This syndrome is a rare, but a serious genetic affection, characterized by a high risk to develop neoplastic diseases; that´s one reason why it is very important to know about it in order to identify, and treat its feared complications in time(AU)


Assuntos
Humanos , Masculino , Pessoa de Meia-Idade , Carcinoma de Células Renais/diagnóstico , Hemangioblastoma , Doença de von Hippel-Lindau/complicações , Neoplasias Renais/epidemiologia , Imageamento por Ressonância Magnética
10.
Rev. cuba. oftalmol ; 30(2): 1-11, abr.-jun. 2017. tab
Artigo em Espanhol | LILACS | ID: biblio-901359

RESUMO

Objetivo: determinar el comportamiento de la discapacidad visual por retinopatía diabética en dos áreas de salud del municipio Playa. Métodos: se realizó una investigación exploratoria, observacional y descriptiva, en la que se practicó un examen oftalmológico a los diabéticos, donde se evaluó por especialistas de retina la presencia de lesiones en el fondo de ojo y su asociación con otras afecciones oftalmológicas. Resultados: las dos áreas de salud presentaron características demográficas y de la enfermedad diabética similares. Las formas no proliferativas de los dos grupos se presentaron en el 8,5 y 4,8 por ciento, no así la forma proliferativa, que fue de 2 y 2,7 por ciento. La maculopatía leve fue más frecuente que la severa en los dos grupos. La prevalencia de algún grado de retinopatía y de maculopatía fue de 13,1 y 10,6 por ciento, respectivamente. El mayor porcentaje de pacientes en los dos grupos de estudio no había sido examinado o había transcurrido más de un año de haberse realizado un fondo de ojo. Se encontró un número elevado de ojos de pacientes con catarata evidente (31,2 y 26,5 por ciento. La prevalencia de baja visión (10,9 y 11 por ciento) y de ceguera (2,9 y 2,7 por ciento) fue similar en los dos grupos, pero sus causas pueden ser reversibles, prevenibles y tratables. Conclusiones: a pesar de que la muestra fue pequeña y la prevalencia de retinopatía y/o maculopatía fue baja, se presentaron pacientes con discapacidad visual prevenible y tratable(AU)


Objective: to determine the situation of visual disability caused by diabetic retinopathy in two health areas of Playa municipality. Methods: a descriptive, observational and exploratory research study was conducted where eye exam was performed in diabetic patients to evaluate the presence of fundus oculi lesions and their association with other ophthalmological diseases. Results: it was found that the two health areas showed similar demographic characteristics and diabetic disease features. Non-proliferative forms of the two groups occurred in 8.5 and 4.8 percent whereas the proliferative form was seen in 2 percent and 2.7 percent. Mild maculopathy was more common than the severe one in the two groups of patients. The prevalence of retinopathy and maculopathy was 13.1 and 10.6 percent, respectively. The highest percentage of patients in the two study groups had not been examined or their fundus oculi test had been performed over a year ago. There was a high number of patients with evident cataract (31.2 and 26.5 percent). The prevalence rates of low vision (10.9 and 11 percent) and of blindness (2.9 and 2.7 percent) were almost the same in the two groups; however it should be borne in mind that their causes can be reversible, preventable and treatable. Conclusions: despite the small sample size and the low prevalence of retinopathy and/or maculopathy, there were patients with preventable and treatable vision(AU)


Assuntos
Humanos , Retinopatia Diabética/prevenção & controle , Degeneração Macular/terapia , Baixa Visão/prevenção & controle , Pessoas com Deficiência Visual , Epidemiologia Descritiva , Estudo Observacional
11.
Rev. cuba. oftalmol ; 30(2): 1-11, abr.-jun. 2017. tab
Artigo em Espanhol | CUMED | ID: cum-73258

RESUMO

Objetivo: determinar el comportamiento de la discapacidad visual por retinopatía diabética en dos áreas de salud del municipio Playa. Métodos: se realizó una investigación exploratoria, observacional y descriptiva, en la que se practicó un examen oftalmológico a los diabéticos, donde se evaluó por especialistas de retina la presencia de lesiones en el fondo de ojo y su asociación con otras afecciones oftalmológicas. Resultados: las dos áreas de salud presentaron características demográficas y de la enfermedad diabética similares. Las formas no proliferativas de los dos grupos se presentaron en el 8,5 y 4,8 por ciento, no así la forma proliferativa, que fue de 2 y 2,7 por ciento. La maculopatía leve fue más frecuente que la severa en los dos grupos. La prevalencia de algún grado de retinopatía y de maculopatía fue de 13,1 y 10,6 por ciento, respectivamente. El mayor porcentaje de pacientes en los dos grupos de estudio no había sido examinado o había transcurrido más de un año de haberse realizado un fondo de ojo. Se encontró un número elevado de ojos de pacientes con catarata evidente (31,2 y 26,5 por ciento. La prevalencia de baja visión (10,9 y 11 por ciento) y de ceguera (2,9 y 2,7 por ciento) fue similar en los dos grupos, pero sus causas pueden ser reversibles, prevenibles y tratables. Conclusiones: a pesar de que la muestra fue pequeña y la prevalencia de retinopatía y/o maculopatía fue baja, se presentaron pacientes con discapacidad visual prevenible y tratable(AU)


Objective: to determine the situation of visual disability caused by diabetic retinopathy in two health areas of Playa municipality. Methods: a descriptive, observational and exploratory research study was conducted where eye exam was performed in diabetic patients to evaluate the presence of fundus oculi lesions and their association with other ophthalmological diseases. Results: it was found that the two health areas showed similar demographic characteristics and diabetic disease features. Non-proliferative forms of the two groups occurred in 8.5 and 4.8 percent whereas the proliferative form was seen in 2 percent and 2.7 percent. Mild maculopathy was more common than the severe one in the two groups of patients. The prevalence of retinopathy and maculopathy was 13.1 and 10.6 percent, respectively. The highest percentage of patients in the two study groups had not been examined or their fundus oculi test had been performed over a year ago. There was a high number of patients with evident cataract (31.2 and 26.5 percent). The prevalence rates of low vision (10.9 and 11 percent) and of blindness (2.9 and 2.7 percent) were almost the same in the two groups; however it should be borne in mind that their causes can be reversible, preventable and treatable. Conclusions: despite the small sample size and the low prevalence of retinopathy and/or maculopathy, there were patients with preventable and treatable vision(AU)


Assuntos
Humanos , Retinopatia Diabética/prevenção & controle , Degeneração Macular/terapia , Baixa Visão/prevenção & controle , Pessoas com Deficiência Visual , Epidemiologia Descritiva , Estudo Observacional
12.
Rev. cuba. oftalmol ; 28(1): 0-0, ene.-mar. 2015. tab
Artigo em Espanhol | LILACS | ID: lil-747740

RESUMO

Los pacientes con diabetes se incrementan; pero aún contamos con tiempo para actuar en el diagnostico precoz y en el tratamiento oportuno de la retinopatía diabética para prevenir la pérdida visual en estos pacientes. Establecemos una guía para la prevención de la ceguera por retinopatía diabética, donde se involucran los tres niveles de atención médica. Se realiza un análisis de la situación epidemiológica a nivel mundial y en Cuba; además, se tienen en cuenta las instalaciones con equipamiento y personal médico especializado para el diagnóstico y tratamiento de la retinopatía diabética. Se trazan estrategias para el desarrollo del programa en el cual ponemos todo nuestro esfuerzo y empeño para mejorar la calidad visual de los pacientes diabéticos(AU)


The number of patients with diabetes is on the increase, but we still have time to work in the early diagnosis and due treatment of diabetic retinopathy to prevent the visual loss in these patients. A guideline for the prevention of blindness due diabetic retinopathy involving the three levels of care was set. An analysis of the present epidemiological situation in Cuba and worldwide was made, taking into account the duly equipped facilities with specialized medical staff for the diagnoses and treatment of the diabetic retinopathy. Strategies are being drawn up for the development of the program, in a joint effort to improve the visual quality of the diabetic patients(AU)


Assuntos
Humanos , Cegueira/prevenção & controle , Retinopatia Diabética/diagnóstico , Retinopatia Diabética/terapia , Estratégias de Saúde Nacionais , Monitoramento Epidemiológico
13.
Rev. cuba. oftalmol ; 28(1): 0-0, ene.-mar. 2015. tab
Artigo em Espanhol | CUMED | ID: cum-63878

RESUMO

Los pacientes con diabetes se incrementan; pero aún contamos con tiempo para actuar en el diagnostico precoz y en el tratamiento oportuno de la retinopatía diabética para prevenir la pérdida visual en estos pacientes. Establecemos una guía para la prevención de la ceguera por retinopatía diabética, donde se involucran los tres niveles de atención médica. Se realiza un análisis de la situación epidemiológica a nivel mundial y en Cuba; además, se tienen en cuenta las instalaciones con equipamiento y personal médico especializado para el diagnóstico y tratamiento de la retinopatía diabética. Se trazan estrategias para el desarrollo del programa en el cual ponemos todo nuestro esfuerzo y empeño para mejorar la calidad visual de los pacientes diabéticos(AU)


The number of patients with diabetes is on the increase, but we still have time to work in the early diagnosis and due treatment of diabetic retinopathy to prevent the visual loss in these patients. A guideline for the prevention of blindness due diabetic retinopathy involving the three levels of care was set. An analysis of the present epidemiological situation in Cuba and worldwide was made, taking into account the duly equipped facilities with specialized medical staff for the diagnoses and treatment of the diabetic retinopathy. Strategies are being drawn up for the development of the program, in a joint effort to improve the visual quality of the diabetic patients(AU)


Assuntos
Humanos , Retinopatia Diabética/diagnóstico , Retinopatia Diabética/terapia , Estratégias de Saúde Nacionais , Cegueira/prevenção & controle , Monitoramento Epidemiológico
14.
Rev. cuba. oftalmol ; 26(3): 452-465, sep.-dic. 2013.
Artigo em Espanhol | LILACS | ID: lil-706675

RESUMO

El pilar principal de tratamiento de las inflamaciones oculares tanto postquirúrgicas como endógenas, se basa en el uso de esteroides. Aunque estos medicamentos son efectivos, su empleo no está exento de riesgos como la hipertensión ocular y la aceleración de la formación de la catarata, principalmente en el caso de los esteroides más fuertes como la prednisolona y la betametasona. Esta revisión estuvo encaminada a la profundización del conocimiento sobre la bioquímica y el desarrollo del difluprednate, nueva droga esteroidea sintética de alta potencia, cuyo uso está aprobado por la Food and Drug Administration FDA para el tratamiento del edema macular después de la cirugía del segmento anterior. Se analizaron algunos aspectos de este medicamento off-label como la farmacocinética, el metabolismo, la distribución ocular del medicamento y utilidad en las fases I, II y III de ensayos clínicos sobre su utilización en pacientes con inflamaciones posoperatorias, tanto del segmento anterior como posterior y con uveítis anterior


The main pillar of the treatment of both the postsurgical and endogenous eye inflammations is based on the use of steroids. Although these drugs are effective, their use has risks such as ocular hypertension and accelerated formation of cataracts, fundamentally in the case of stronger steroids such as prednisolone and betamethasone. This review was aimed at expanding the knowledge on biochemistry and the development of difluprednate, a new highly potent synthetic steroidal drug that has been approved by the Food and Drug Administration FDA to treat macular edema after the anterior segment surgery. Some aspects of this off-label drug were analyzed such as pharmacokinetics, metabolism, ocular distribution of drug and usefulness in phases I, II and II of clinical assays on the use of these drugs in patients with postoperative inflammations both in the anterior and the posterior segments and with anterior uveitis


Assuntos
Humanos , Edema Macular/tratamento farmacológico , Esteroides/farmacocinética , Esteroides/uso terapêutico , Segmento Anterior do Olho/cirurgia
15.
Rev. cuba. oftalmol ; 26(3): 482-499, sep.-dic. 2013.
Artigo em Espanhol | LILACS | ID: lil-706677

RESUMO

Los cambios y las variaciones anatómicas vítreorretinianas predisponen al desprendimiento de retina regmatógeno, por lo que su conocimiento es de vital importancia para el tratamiento adecuado de los pacientes. Por ello se decidió realizar una revisión acerca de los elementos más importantes al respecto, con el objetivo de actualizar los conocimientos existentes sobre el tema. Estos precursores comprenden tres entidades que, por su fisiopatología, pueden estar presentes en la historia natural de esta afección: Desprendimiento de vítreo posterior, degeneraciones periféricas y desgarro de retina (sintomáticos y asintomáticos). Además, algunas situaciones de riesgo como la cirugía de catarata, la capsulotomía posterior con YAG-láser, los traumatismos y la miopía alta pueden favorecer también al desprendimiento de retina. Estos precursores, por lo general, se hacen más evidentes después de los 40 años, sin predilección por sexo o características raciales y están muy relacionadas con cambios vítreos o su licuefacción. El conocimiento básico y actualizado de estas entidades, así como de los factores de riesgo asociados al desprendimiento de retina es importante para el adecuado manejo y el control de las complicaciones. En la revisión se describen con claridad los pilares fundamentales para el diagnóstico y tratamiento de este tipo de situaciones clínicas


The changes and the vitreous retinal anatomical variations predispose to rhegmatogenous detachment of the retina, so knowing them is very important for the adequate treatment of patients. Therefore, it was decided to make a review on the most important elements, with the objective of updating the existing pieces of knowledge on the topic. These precursors include three entities that, because of their physiopathology, can be present in the natural history of this illness: detachment of posterior vitreous, peripheral degeneration and retinal tear (symptomatic and asymptomatic). Additionally, some risk situations such as cataract surgery, posterior capsulotomy with YAG-laser, traumas and high myopia may also favor the retinal detachment. These precursors became more evident after the 40's, without sex or race preferences, and they are closely related to vitreous changes or to their liquefaction. The basic updated knowledge about these illnesses as well as the risk factors associated to the retinal detachment is important to adequate management and control of complications. The review clearly described the fundamental pillars in diagnosis and treatment of this type of clinical situations


Assuntos
Humanos , Descolamento Retiniano/cirurgia , Descolamento do Vítreo/cirurgia , Retinosquise/cirurgia , Cirurgia Vitreorretiniana
16.
Rev. cuba. oftalmol ; 26(3): 452-465, sept.-dic. 2013.
Artigo em Espanhol | CUMED | ID: cum-60383

RESUMO

El pilar principal de tratamiento de las inflamaciones oculares tanto postquirúrgicas como endógenas, se basa en el uso de esteroides. Aunque estos medicamentos son efectivos, su empleo no está exento de riesgos como la hipertensión ocular y la aceleración de la formación de la catarata, principalmente en el caso de los esteroides más fuertes como la prednisolona y la betametasona. Esta revisión estuvo encaminada a la profundización del conocimiento sobre la bioquímica y el desarrollo del difluprednate, nueva droga esteroidea sintética de alta potencia, cuyo uso está aprobado por la Food and Drug Administration FDA para el tratamiento del edema macular después de la cirugía del segmento anterior. Se analizaron algunos aspectos de este medicamento off-label como la farmacocinética, el metabolismo, la distribución ocular del medicamento y utilidad en las fases I, II y III de ensayos clínicos sobre su utilización en pacientes con inflamaciones posoperatorias, tanto del segmento anterior como posterior y con uveítis anterior(AU)


The main pillar of the treatment of both the postsurgical and endogenous eye inflammations is based on the use of steroids. Although these drugs are effective, their use has risks such as ocular hypertension and accelerated formation of cataracts, fundamentally in the case of stronger steroids such as prednisolone and betamethasone. This review was aimed at expanding the knowledge on biochemistry and the development of difluprednate, a new highly potent synthetic steroidal drug that has been approved by the Food and Drug Administration FDA to treat macular edema after the anterior segment surgery. Some aspects of this off-label drug were analyzed such as pharmacokinetics, metabolism, ocular distribution of drug and usefulness in phases I, II and II of clinical assays on the use of these drugs in patients with postoperative inflammations both in the anterior and the posterior segments and with anterior uveitis(AU)


Assuntos
Humanos , Segmento Anterior do Olho/cirurgia , Edema Macular/tratamento farmacológico , Esteroides/uso terapêutico , Esteroides/farmacocinética
17.
Rev. cuba. oftalmol ; 26(3): 482-499, sept.-dic. 2013. tab
Artigo em Espanhol | CUMED | ID: cum-60381

RESUMO

Los cambios y las variaciones anatómicas vítreorretinianas predisponen al desprendimiento de retina regmatógeno, por lo que su conocimiento es de vital importancia para el tratamiento adecuado de los pacientes. Por ello se decidió realizar una revisión acerca de los elementos más importantes al respecto, con el objetivo de actualizar los conocimientos existentes sobre el tema. Estos precursores comprenden tres entidades que, por su fisiopatología, pueden estar presentes en la historia natural de esta afección: Desprendimiento de vítreo posterior, degeneraciones periféricas y desgarro de retina (sintomáticos y asintomáticos). Además, algunas situaciones de riesgo como la cirugía de catarata, la capsulotomía posterior con YAG-láser, los traumatismos y la miopía alta pueden favorecer también al desprendimiento de retina. Estos precursores, por lo general, se hacen más evidentes después de los 40 años, sin predilección por sexo o características raciales y están muy relacionadas con cambios vítreos o su licuefacción. El conocimiento básico y actualizado de estas entidades, así como de los factores de riesgo asociados al desprendimiento de retina es importante para el adecuado manejo y el control de las complicaciones. En la revisión se describen con claridad los pilares fundamentales para el diagnóstico y tratamiento de este tipo de situaciones clínicas(AU)


The changes and the vitreous retinal anatomical variations predispose to rhegmatogenous detachment of the retina, so knowing them is very important for the adequate treatment of patients. Therefore, it was decided to make a review on the most important elements, with the objective of updating the existing pieces of knowledge on the topic. These precursors include three entities that, because of their physiopathology, can be present in the natural history of this illness: detachment of posterior vitreous, peripheral degeneration and retinal tear (symptomatic and asymptomatic). Additionally, some risk situations such as cataract surgery, posterior capsulotomy with YAG-laser, traumas and high myopia may also favor the retinal detachment. These precursors became more evident after the 40's, without sex or race preferences, and they are closely related to vitreous changes or to their liquefaction. The basic updated knowledge about these illnesses as well as the risk factors associated to the retinal detachment is important to adequate management and control of complications. The review clearly described the fundamental pillars in diagnosis and treatment of this type of clinical situations(AU)


Assuntos
Humanos , Descolamento Retiniano/cirurgia , Descolamento do Vítreo/cirurgia , Cirurgia Vitreorretiniana , Retinosquise/cirurgia
18.
ACS Appl Mater Interfaces ; 5(11): 4659-66, 2013 Jun 12.
Artigo em Inglês | MEDLINE | ID: mdl-23682744

RESUMO

We report on the optical constants and their dispersion profiles determined from spectroscopic ellipsometry (SE) analysis of the 20%-titanium (Ti) doped of tungsten oxide (WO3) thin films grown by sputter-deposition. The Ti-doped WO3 films grown in a wide range of temperatures (25-500 °C) are amorphous and optically transparent. SE data indicates that there is no significant interdiffusion at the film-substrate interface for a W-Ti oxide film growth of ~90 nm. The index refraction (n) at λ = 550 nm vary in the range of 2.17-2.31 with a gradual increase in growth temperature. A correlation between the growth conditions and optical constants is discussed.

19.
Graefes Arch Clin Exp Ophthalmol ; 251(1): 27-34, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-22580948

RESUMO

PURPOSE: To evaluate the ability of confocal scanning laser ophthalmoscope (cSLO) in the retromode imaging modality in detecting retinal changes secondary to exudative age-related macular degeneration (AMD). METHODS: Seventeen eyes of 13 consecutive patients affected by CNV secondary to AMD were evaluated with optical coherence tomography (OCT) to detect neuroretinal detachment (NRD), pigment epithelial detachment (PED), cystoid macular edema (CME), and epiretinal membranes (ERM). All eyes were examined with a cSLO equipped with infrared retromode (RM) imaging modality. Infrared and fundus autofluorescence images were also obtained (IR and FAF). The intermethod agreement between OCT and cSLO was evaluated considering single cSLO imaging modality separately (IR, FAF, and RM), and all imaging modalities together. RESULTS: Eight eyes (47 %) had NRD at OCT; intermethod agreement was poor for any single cSLO imaging modality considered separately (k: 0.14, 0.01, and 0.29 for cSLO IR, FAF, and RM, respectively). Four eyes had PED at OCT (24 %); intermethod agreement was mild for cSLO RM, poor for IR and FAF (k: 0.51, 0.16, and 0.00, respectively). CME was present in eight eyes (47 %); intermethod agreement was excellent for cSLO RM, poor for IR and FAF (k: 0.88, 0.38, and 0.26, respectively). ERM was present in three eyes (18 %); intermethod agreement was mild for cSLO IR, poor for FAF, and excellent for RM (k: 0.59, 0.00, and 0.76, respectively). CONCLUSIONS: cSLO RM imaging is a useful and reproducible technique in detecting retinal features associated with CNV, particularly CME.


Assuntos
Oftalmoscopia/métodos , Retina/patologia , Degeneração Macular Exsudativa/diagnóstico , Idoso , Idoso de 80 Anos ou mais , Corantes , Membrana Epirretiniana/diagnóstico , Exsudatos e Transudatos , Feminino , Angiofluoresceinografia , Humanos , Verde de Indocianina , Edema Macular/diagnóstico , Masculino , Pessoa de Meia-Idade , Descolamento Retiniano/diagnóstico , Epitélio Pigmentado da Retina/patologia , Tomografia de Coerência Óptica , Acuidade Visual/fisiologia
20.
Rev. cuba. oftalmol ; 25(1): 161-168, ene.-jun. 2012.
Artigo em Espanhol | LILACS | ID: lil-629500

RESUMO

Se presenta una paciente de 55 años de edad con diagnóstico de carcinoma ductal infiltrante grado II multicéntrico de mama izquierda. Esta refiere pérdida del hemicampo temporal del ojo izquierdo. A través de la oftalmoscopia binocular indirecta se le diagnosticó una lesión metastásica coroidea y se corroboró por ultrasonido ocular. Se le realizó tratamiento quirúrgico del tumor primario, además de poliquimioterapia, terapia hormonal y radioterapia local externa a la lesión coroidea. A los seis meses de tratamiento hubo regresión total de la lesión con recuperación de la visión a 20/20, valor inicial al diagnóstico de la enfermedad.


The case of a 55-year-old woman with diagnosis of multinodular Grade II ductal infiltrating carcinoma in left breast was presented in this article. She presented with temporal visual field defect in her left eye. A choroidal metastatic tumor was diagnosed by indirect binocular ophthalmoscopy, confirmed by ocular echography. The primary tumor was removed by surgery and the choroidal lesion was treated with systemic chemotherapy, hormonal therapy and external beam radiation therapy. Six months after the treatment, the choroidal metastasis showed complete regression, and the best visual acuity of 20/20 was recovered, which was the initial value at the diagnosis of disease.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...