Oferta y demanda en el mercado turístico homosexual: una propuesta de estrategias de intercambio para la mejora del marketing en el segmento

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Caryn Moner Korflür

2007-01-01

Full Text Available La demanda turística homosexual presenta características diferenciales, y necesidades y motivaciones específicas a las que la gran mayoría de empresas del sector turístico no han sabido y/o podido responder. El presente trabajo trata de identificar los principales tipos de empresas u organizaciones que actúan en este mercado y que constituyen la oferta turística, definir las peculiaridades de la demanda turística homosexual en cuanto a sus necesidades y expectativas, y exponer una serie de estrategias de marketing, ya sea segmentación, posicionamiento o mezcla de marketing, a seguir por aquellas empresas del sector turístico que deseen orientarse hacia el segmento homosexual.

Correlación entre la localización del lente intraocular, según biomicroscopia ultrasónica,y diferentes parámetros quirúrgicos en pacientes operados de catarata Correlation between the location of the intraocular lens according to ultrasonic biomicroscopy and several surgical parameters in patients operated from cataract

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Eneida de la C Pérez Candelaria

2010-01-01

Full Text Available OBJETIVO: Determinar la correlación entre la localización del lente intraocular en cámara posterior por biomicroscopia ultrasónica, diferentes parámetros quirúrgicos en pacientes operados de catarata. MÉTODOS: Se realizó un estudio descriptivo, prospectivo y transversal en el Instituto Cubano de Oftalmología «Ramón Pando Ferrer», durante el período de enero a junio del 2007. Se estudiaron variables como: edad, sexo, etiología de la catarata, técnica quirúrgica, localización del lente intraocular según biomicroscopia ultrasónica, así como complicaciones transoperatorias y posoperatorias. RESULTADOS: El 79 % de todos los pacientes operados tenían entre 60 y 79 años de edad y algo más de la mitad correspondió al sexo femenino con un 59 %. La catarata senil fue la etiología que predominó con un 74 % y en el 68 % de los casos el lente se localizó por biomicroscopia ultrasónica en el saco capsular. En los ojos donde el lente intraocular se localizó fuera del saco, la proporción de complicaciones transoperatorias y posoperatorias fueron significativamente mayoritarias, mientras que en los ojos donde el lente intraocular se encontraba en el saco, la mayoría no presentó complicaciones transoperatorias ni posoperatorias. CONCLUSIONES: Las diferencias entre las distintas localizaciones del lente intraocular se encontraron con significación estadística en el tipo de catarata, la presencia de complicaciones transoperatorias y posoperatorias, sin embargo, no se encontró relación estadística significativa entre la localización del lente intraocular con la técnica quirúrgica utilizada.OBJECTIVE: To determine the correlation between the location of the intraocular lens in the posterior chamber using ultrasonic biomicroscopy and the different surgical parameters in patients operated from cataract. METHODS: A prospective, descriptive and cross-sectional study was carried out in "Ramón Pando Ferrer" Cuban Institute of

Experiencia con la lente intraocular RAYNER 620H Experience gained with the use of intraocular lens RAYNER 620 H

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Juan Raúl Hernández Silva

2008-06-01

Full Text Available Un importante eslabón en el progreso alcanzado en la cirugía de cataratas, está fundamentado en el desarrollo industrial paralelo que ha ocurrido durante los últimos años con la introducción de nuevos modelos de lentes intraoculares, como el Rayner 620 H; el perfeccionamiento del instrumental quirúrgico, sistemas de aspiración e irrigación bimanual y bisturí con la medida exacta para colocar el inyector de la lente intraocular. La lente intraocular Rayner 620H significó un gran paso para la facoemulsificación y el control de la opacidad de la cápsula posterior posoperatoria por el diseño peculiar de su óptica y hápticos, que permiten un implante seguro, fácil y una incisión mínima. Se realizó un estudio prospectivo y descriptivo, cuyo universo de estudio fueron 28 ojos con diagnóstico de cataratas a los cuales se les realizó facoemulsificación con implante de lente intraocular Rayner 620 H, en el Centro de Microcirugía Ocular del Instituto Cubano de oftalmología "Ramón Pando Ferrer" en el período comprendido entre junio de 2006 a febrero de 2007. El grupo de edades donde se encontró el de mayor número de pacientes fue en el de más de 60 años. En todos los casos hubo un aumento significativo de la agudeza visual sin corrección y con ella, del preoperatorio al posoperatorio. Hubo un aumento del cilindro queratométrico del preoperatorio al posoperatorio, pero este fue mínimo La pérdida de células endoteliales fue baja del preoperatorio al posoperatorio, respectivamente. No hubo ninguna complicación durante la cirugía ni después de esta. Evaluamos como satisfactoria la efectividad del lente intraocular Rayner 620 H, por el aumento de la agudeza visual del paciente, el bajo astigmatismo inducido, mejoría del campo visual por confrontación, mínima pérdida de células endoteliales, y ausencia de complicaciones y de deslumbramiento posoperatorio en los pacientes.An important link in the advances made by the

Utilización del Tisuacryl® en la anastomosis del esófago con otros segmentos del tubo digestivo Use of Tisuacryl® in esophagus anastomosis with other segments of the digestive tube

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Rosalba Roque González

2006-06-01

Full Text Available Las dehiscencias y fístulas de las anastomosis del esófago con segmentos pediculados del tubo digestivo son complicaciones frecuentes en la cirugía del esófago. En diversas estadísticas recientes, nacionales y extranjeras, se ha registrado una incidencia de hasta el 40 %. Este hecho, unido a las ventajas reportadas en la utilización de los adhesivos sintéticos del tipo del Tisuacryl®, hace interesante realizar un estudio clínico para extender el uso del producto al reforzamiento de las suturas en la anastomosis del esófago con otros segmentos del tubo digestivo, con el fin de prevenir las dehiscencias. Se realizó un ensayo clínico de fase II, prospectivo, controlado, aleatorizado, multicéntrico, a simple ciegas, que se extendió desde enero de 1998 hasta febrero de 2005. En él se incluyeron pacientes que ingresaron en los hospitales «Calixto García» y «Miguel Enríquez» con el diagnóstico de enfermedades esofágicas. Se logró la introducción en el país de una nueva aplicación para el adhesivo tisular Tisuacryl® y se demostró que la utilización del producto es una opción significativamente más ventajosa que el procedimiento convencional sólo con sutura, ya que se obtuvo una eficacia del 93 % en el grupo experimental respecto al 64 % en el grupo control. Uno y otro grupo eran homogéneos respecto a las variables de control. El tratamiento con Tisuacryl® disminuyó la frecuencia de aparición de fístulas esofágicas y no se reportaron eventos adversos en relación con la aplicación del producto.The dehiscences and fistulae of esophagus anastomosis with pedicular segments of the digestive tube are frequent complications in esophagus surgery. In various recent national and foreign statistics, an incidence of even 40 % has been registered. This fact, together with the advantages reported on the use of synthetic adhesives like Tisuacryl® made us to take an interest in conducting a clinical study to extend the use of

Caracterización del mercado de arrendamientos urbano para el segmento de la población de bajos ingresos

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Jorge Enrique Torres Ramírez

2008-01-01

Full Text Available Siguiendo los preceptos de la economía urbana, la mayor parte de las necesidades habitacionales se atiende con los servicios derivados de los inmuebles que integran el stock conformado históricamente, representando la oferta y demanda de edificaciones nuevas una proporción mínima del mercado total. Así, los mercados de unidades usadas y, especialmente, los arrendamientos, constituyen segmentos que concentran un volumen de transacciones cuya dimensión, en términos físicos y económicos, representa el mayor componente del mercado total de edificaciones. Los resultados de esta investigación permiten hacer un reconocimiento al aporte del mercado de arrendamientos sobre los niveles actuales de calidad habitacional y de vida en Colombia. Puede plantearse así que sin esta oferta, generada por los hogares de manera directa y en gran parte por formas de producción social, el stock habitacional estaría aún más rezagado respecto de las necesidades habitacionales actuales de los hogares colombianos. En Colombia, el mercado de arrendamientos correspondiente a los hogares de menores ingresos ofrece también un potencial de desarrollo atractivo para los empresarios del sector de la edificación urbana y de la intermediación inmobiliaria. El stock debe crecer más rápido y esta forma de tenencia tiene posibilidades concretas de alojar una importante oferta formal actualmente inexistente.

Lesiones traumáticas de los anexos y del segmento anterior del ojo en los boxeadores Traumatic lesions of the adnexa and of the anterior segment of the eye in fighters

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Agustín Fernández Sánchez

2003-06-01

Full Text Available Se realizó un estudio retrospectivo con una muestra de 71 boxeadores a los cuales se les examinaron las estructuras de referencia mediante oftalmoscopia directa y biomicroscopia ocular, antes de las 6 horas posteriores al término de sus peleas; donde se obtuvo como resultado que los anexos afectados fueron los párpados con 5 hematomas, 4 edemas y 1 excoriación; y la conjuntiva con 4 hiperemias y 8 hemorragias. En el segmento anterior del ojo sólo se afectó la córnea con 13 lesiones en total, divididas en 10 excoriaciones superficiales y 3 profundas. Las lesiones traumáticas predominantes en los anexos del ojo son las de los párpados y las de la conjuntiva y las del segmento anterior del ojo, las de la córnea. El ojo más afectado fue el izquierdo y las lesiones más frecuentes fueron en las categorías de 13 y 14, 17 y 18 y 19 y 34 años las corneales, las conjuntivales y la de los párpados, respectivamente.A retrospective study was carried out with a sample of 71 fighters, whose reference structures were examined by direct ophthalmoscopy and ocular biomicroscopy within the 6 hours following their fights. As a result, it was observed that the affected adnexa were the eyelids with 5 hematomas, 4 edemas and 1 excoriation; and the conjunctiva with 4 hyperemias and 8 hemorrhages. In the anteriro segment, only the cornea was affected with 13 lesions in all, divided into 10 superficial and 3 deep excoriations.The traumatic lesions prevailing in the adnexa of the eye are those of the eyelids and the conjunctiva, whereas the predominating traumatic lesions of the anterior segment of the eye are those of the cornea. The left eye was the most affected and the most frequent lesions were in the categories 13 and 14, 17 and 18 and 19 and 34 years old in the cornea, the conjunctiva and the eyelids, respectively.

Evaluación de las tecnologías crediticias de las cooperativas del segmento 3 de la ciudad de Quito y su incidencia en los principales indicadores financieros de riesgo: morosidad, liquidez y solvencia

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Núñez Oñate, Flor Cumandá

2017-01-01

En el Ecuador, las entidades del sector financiero popular y solidario (SFPS) en particular las cooperativas de ahorro y crédito han mantenido un constante crecimiento frente al sector financiero y económico del país, pues cubren segmentos de mercado no alcanzados por la banca privada tradicional atendiendo la demanda de crédito y demás servicios financieros tanto en áreas urbanas como rurales. En este contexto, el presente trabajo de investigación tiene como objetivo evaluar las tecnologías ...

Infarto agudo del miocardio sin elevación del segmento T: Consideraciones fisiopatológicas y clínicas Heart attack without an elevation of the T segment: Clinical and pathophysiological

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Maikel Rodulfo García

2010-09-01

Full Text Available Se revisaron numerosos documentos (impresos y electrónicos sobre afecciones cardiovasculares, particularmente acerca del infarto agudo del miocardio sin elevación del segmento T, teniendo en cuenta que la mortalidad hospitalaria es menor cuando se produce un síndrome coronario con esa característica. Para actualizar el tema se valoraron diversos aspectos relacionados con concepto, clasificación, fisiopatología, diagnóstico, cuadro clínico, exámenes complementarios y factores de riesgo, puesto que las enfermedades del corazón son actualmente la principal causa de muerte en naciones industrializadas y se espera que también lo sean en los países en vías de desarrollo para el 2020, entre ellos Cuba.Several documents (printed and electronic about cardiovascular diseases were reviewed, particularly heart attack without an elevation of the T-segment, taking into account that the hospital mortality is lower when a coronary syndrome with that characteristic occurs. To update the topic several aspects related to concept, classification, pathophysiology, diagnosis, clinical pattern, laboratory tests and risk factors were valued since heart diseases are actually the main cause of death in industrialized nations and it is expected that they will also be the same cause of death in developing countries for 2020, among them, Cuba.

Análisis del comportamiento del segmento lumbar, no artrodesado, en escoliosis idiopática del adolescente de curva Lenke tipo 1 Análise do comportamento do segmento lombar sem artrodese em escoliose idiopática do adolescente com curvatura de Lenke tipo 1 Analysis of the behavior of the lumbar segment without spinal fusion in adolescent idiopathic scoliosis with curvature of lenke type 1

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Nicolás Siderakis

2012-06-01

Full Text Available OBJETIVO: Determinar el comportamiento del segmento lumbar, no artrodesado, en el plano coronal luego de fusiones torácicas selectivas en pacientes con escoliosis idiopática del adolescente con curvas Lenke 1. MÉTODOS: Se evaluaron 21 pacientes con un seguimiento promedio de 29,71 meses (rango: 24-60 meses mediante análisis clínico y radiográfico retrospectivos de pacientes que presentaron escoliosis idiopáticas del adolescente, con curvas Lenke tipo 1 (ABC. RESULTADOS: En todos los pacientes, en los que se produjo un desequilibrio en el plano coronal, se constató la progresión del valor angular de la curva lumbar no artrodesada al final del seguimiento. CONCLUSIÓN: La curva lumbar no artrodesada progresó al final del seguimiento, en todos los pacientes con desequilibrio confirmado en el plano coronal (3/21.OBJETIVO: Determinar o comportamento do segmento lombar sem artrodese no plano coronal, após fusões torácicas seletivas na escoliose idiopática do adolescente com curvaturas de Lenke 1. MÉTODOS: Foram avaliados 21 pacientes com acompanhamento médio de 29,71 meses (faixa: 24 a 60 meses, por meio de análise clínica e radiográfica retrospectiva de pacientes que apresentaram escoliose idiopática do adolescente com curvaturas de Lenke tipo 1 (ABC. RESULTADOS: Constatou-se aumento do ângulo da curva lombar sem artrodese no final do acompanhamento em todos os pacientes que apresentaram desequilíbrio no plano coronal. CONCLUSÃO: O total dos pacientes nos quais se confirmou desequilíbrio no plano coronal (3/21 apresentaram progressão da curva lombar sem artrodese no final do acompanhamento.OBJECTIVE: To determine the outcome of lumbar segment without arthrodesis in the coronal plane, after selective thoracic fusions for with curvature of Lenke type 1 adolescent idiopathic scoliosis with curvature of Lenke type 1. METHODS: Twenty one patients were evaluated, with a mean follow-up of 29.71 months (range: 24-60 months with

Propuesta de incorporación del Segmento Pymes en las operaciones de crédito de la Cooperativa de Ahorro y Crédito 29 de Octubre

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Ríos Páliz, Cristina Araceli

2015-01-01

En el proyecto que se presenta a continuación permite aplicar una metodología de análisis que brinde a la Cooperativismo de Ahorro y Crédito “29 de Octubre”, incorporar operaciones de crédito del segmento Comercial Pymes a su cartera de crédito cumpliendo lo establecido por la Superintendencia de Bancos, normativa que será transitoria para la Superintendencia de Economía Popular y Solidaria hasta que defina sus políticas de control y seguimiento para las Cooperativas de Ahorro y Crédito por ...

Achyrocline satureioides (Lam.) DC. : propagación in vitro a partir de segmentos nodales

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Gattusso, Susana; Scandizzi, Angel; Busilacchi, Héctor; Di Sapio, Osvaldo; Severin, Cecilia

2007-01-01

Achyrocline satureioides (Lam.) DC. conocida con el nombre vulgar de “marcela”, es intensamente utilizada en la medicina popular por sus propiedades medicinales. En el presente trabajo, se describe una técnica que permite la regeneración de plantas de A. satureioides mediante el cultivo in vitro de segmentos uninodales. Para la regeneración de brotes se empleó un medio semisólido conteniendo ¾ de la concentración de sales minerales y vitaminas del medio de cultivo de Murashige y Sko...

Variación de los segmentos corporales de escolares patagónicos en barrios con diferentes NBB

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Botterón, Tania Vanesa

2007-01-01

Full Text Available Los segmentos corporales presentan diferentes períodos de maduración, reflejando su relación con la nutrición y condicionando la expresión del dimorfismo sexual (DS. El objetivo del trabajo fue evaluar el DS observado en el crecimiento de escolares de 6 a 14 años de barrios con diferentes NBI -(NBI alto y (NBI bajo-. Se estudió transversalmente una muestra de 500 mujeres y 570 varones de la ciudad de Puerto Madryn, Chubut. Se relevaron: estatura total, estatura sentada (ES y se calculó la longitud del segmento inferior (LSI y el índice córmico (IC. Se utilizaron pruebas de Wilcoxon, p= 0.05. La ES presentó para todas las edades valores nominales mayores en el NBI bajo (p=0.3 respecto al NBI alto (p=0.22. De igual manera se comportó la LSI (p=0.06 NBI bajo; (p=0.09 NBI alto. El IC presentó dos eventos evidentes en cada sexo: uno cercano a los 6.5 años y hasta alrededor de los 9-10 años, donde el valor del IC fue menor en las mujeres respecto de los varones y otro a los 10.5-12 años, edad a la cual los valores femeninos superaron a los masculinos (NBI bajo p=0.16; NBI alto p=0.22. La ref. NHANES presentó un comportamiento similar. Los resultados confirman la influencia que ejercen las desigualdades sociales -como agentes estresantes- sobre el crecimiento de la población infantil estudiada, cuya respuesta adaptativa difiere a la de otras poblaciones argentinas y americanas.

Análisis del proceso de minería de datos sobre la base de datos Bioinformática de segmentos de la proteína p53, asociada a la actividad cancerígena

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Franco Simonetti

2011-03-01

Full Text Available Se estudió la utilización de estrategias para afrontar el problema del desbalanceo y la alta dimensionalidad de los registros que habitualmente forman parte de las bases de datos en el área bioinformática. Se tomó como caso de estudio la base de datos de segmentos de la proteína p53; sobre dicha base se construyen modelos con el fin de identificar si corresponden a patrones activos o inactivos. El problema del desbalanceo se abordó a través de una red neuronal no supervisada, y el de la selección de variables para reducir la alta dimensionalidad, a partir de una combinación de métodos con diferentes enfoques. Experimentos preliminares del modelo propuesto en datos estándar muestran resultados promisorios.

Análisis del proceso de minería de datos sobre la base de datos Bioinformática de segmentos de la proteína p53, asociada a la actividad cancerígena

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Alejandro Hadad

2011-11-01

Full Text Available Se estudió la utilización de estrategias para afrontar el problema del desbalanceo y la alta dimensionalidad de los registros que habitualmente forman parte de las bases de datos en el área bioinformática. Se tomó como caso de estudio la base de datos de segmentos de la proteína p53; sobre dicha base se construyen modelos con el fin de identificar si corresponden a patrones activos o inactivos. El problema del desbalanceo se abordó a través de una red neuronal no supervisada, y el de la selección de variables para reducir la alta dimensionalidad, a partir de una combinación de métodos con diferentes enfoques. Experimentos preliminares del modelo propuesto en datos estándar muestran resultados promisorios.

Escore de risco Dante Pazzanese para síndrome coronariana aguda sem supradesnivelamento do segmento ST Score de riesgo dante pazzanese para síndrome coronario agudo sin supradesnivel del segmento ST Dante Pazzanese risk score for non-st-segment elevation acute coronary syndrome

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Elizabete Silva dos Santos

2009-10-01

Full Text Available FUNDAMENTO: Em síndrome coronariana aguda (SCA, é importante estimar a probabilidade de eventos adversos. OBJETIVO: Desenvolver um escore de risco em uma população brasileira com SCA sem supradesnivelamento do segmento ST (SST. MÉTODOS: Foram avaliados prospectivamente 1.027 pacientes em um centro brasileiro de cardiologia. Um modelo de regressão logística múltipla foi desenvolvido para prever o risco de morte ou de (reinfarto em 30 dias. A acurácia preditiva do modelo foi determinada pelo C statistic. RESULTADOS: O evento combinado ocorreu em 54 pacientes (5,3%. O escore foi criado pela soma aritmética de pontos dos preditores independentes, cujas pontuações foram designadas pelas respectivas probabilidades de ocorrência do evento. As seguintes variáveis foram identificadas: aumento da idade (0 a 9 pontos; antecedente de diabete melito (2 pontos ou de acidente vascular cerebral (4 pontos; não utilização prévia de inibidor da enzima conversora da angiotensina (1 ponto; elevação da creatinina (0 a 10 pontos; e combinação de elevação da troponina I cardíaca e depressão do segmento ST (0 a 4 pontos. Foram definidos quatro grupos de risco: muito baixo (até 5 pontos; baixo (6 a 10 pontos; intermediário (11 a 15 pontos; e alto risco (16 a 30 pontos. O C statistic para a probabilidade do evento foi de 0,78 e para o escore de risco em pontuação de 0,74. CONCLUSÃO: Um escore de risco foi desenvolvido para prever morte ou (reinfarto em 30 dias em uma população brasileira com SCA sem SST, podendo facilmente ser aplicável no departamento de emergência.FUNDAMENTO: En el síndrome coronario agudo (SCA, es importante estimar la probabilidad de eventos adversos. OBJETIVO: Desarrollar un score de riesgo en una población brasileña con SCA sin supradesnivel del segmento ST (SST. MÉTODOS: Se evaluaron prospectivamente 1.027 pacientes en un centro brasileño de cardiología. Un modelo de regresión logística múltiple se

Segmentos de Distribuidores no Setor de Materiais Cirúrgicos: uma aplicação de análise multivariada Distributors Segments of the Division of Surgical Materials: an application of multivariate analysisSegmentos de Distribuidores en el Sector de Materiales Quirúrgicos: una aplicación de análisis multivariado

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PLATA, Juan Pablo França de la

2005-05-01

correspondence analyses provided a mapping that presented the association of ranges of gross sales and gross profit with Brazilian regions and with credit classifications which were defined through the historic evolution of the clients. The results of this study can be useful as a source of information to the identification of strategic actions regarding the discount politics of the prices of the products that are offered to the focused on market.RESUMENEste estudio enfocó el análisis del segmento de distribuidores en Brasil, en la categoría de productos quirúrgicos, atendidos por una gran empresa de este ramo de actividad. Se reunieron informaciones sobre beneficio bruto, ventas líquidas, clasificación de crédito, área regional y región. Las técnicas estadísticas utilizadas para determinar los segmentos y sus respectivas caracterizaciones fueron el análisis de conglomerados y de correspondencia múltiple. Modelos de Lambin (2000 y Czinkota et al. (2001 sirvieron de referencia para el desarrollo de la segmentación del mercado de material quirúrgico. Se observó que es posible clasificar por la técnica de análisis de conglomerados, los segmentos para los distribuidores según los perfiles diferenciados de ventas líquidas y beneficio bruto. El análisis de correspondencia múltiple generó un mapeo que asoció las franjas de ventas líquidas y el beneficio bruto con las regiones brasileñas y con las clasificaciones de crédito designadas según el historial de los clientes. Los resultados de este estudio pueden servir de base para una política de descuento en los precios de lista de productos ofrecidos de acuerdo con las características de los segmentos obtenidos.

Nuevo esteroide tópico en el tratamiento del edema macular

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Ceija Molina Cisneros

Full Text Available 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.

Sistemas de transporte de drogas para o segmento posterior do olho: bases fundamentais e aplicações Drug delivery systems for the posterior segment of the eye: fundamental basis and applications

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Sílvia Ligório Fialho

2007-02-01

Full Text Available As doenças do segmento posterior do olho são responsáveis pela maioria dos casos de cegueira irreversível no mundo inteiro. Este cenário estimula o desenvolvimento de novas modalidades de tratamento para estas doenças. O sucesso no tratamento visa, essencialmente, o transporte de doses efetivas de drogas diretamente para os locais a serem tratados. Devido às dificuldades encontradas no transporte de drogas para o segmento posterior do olho, pesquisas têm sido realizadas no sentido de desenvolver sistemas de administração intra-oculares que permitam liberar concentrações terapêuticas das drogas por período prolongado. Tais sistemas podem proporcionar inúmeras vantagens, como: aumentar a biodisponibilidade e a concentração local da droga, atingir especificamente um tipo de tecido ou célula, reduzir a freqüência de injeções intra-oculares. Tais vantagens podem aumentar o conforto do paciente e reduzir as complicações observadas com a utilização das injeções intra-oculares. Diferentes sistemas de transporte de drogas têm sido desenvolvidos com as finalidades acima descritas. Estes sistemas podem ser compostos por polímeros biodegradáveis ou não-biodegradáveis ou serem formulações lipídicas. Os sistemas de transporte de drogas são representados, principalmente, pelas micro e nanopartículas e pelos implantes, sendo eles compostos por diferentes polímeros; pelos lipossomos, que são compostos por lípides e emulsionantes; e pela iontoforese, que se baseia na aplicação de corrente elétrica. Nesta revisão, as principais características dos diferentes sistemas de transporte de drogas serão descritas, expondo suas potencialidades de aplicação clínica.The diseases of the posterior segment of the eye are responsible for most cases of irreversible blindness worldwide. These conditions stimulate the development of new modalities of treatment for vitreoretinal diseases. The success in the treatment aims, mainly

Intraocular pressure reduction and regulation system

Science.gov (United States)

Baehr, E. F.; Burnett, J. E.; Felder, S. F.; Mcgannon, W. J.

1979-01-01

An intraocular pressure reduction and regulation system is described and data are presented covering performance in: (1) reducing intraocular pressure to a preselected value, (2) maintaining a set minimum intraocular pressure, and (3) reducing the dynamic increases in intraocular pressure resulting from external loads applied to the eye.

Síndrome tóxica do segmento anterior

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Luiz Filipe de Albuquerque Alves

2013-02-01

Full Text Available A síndrome tóxica do segmento anterior (STSA é uma severa reação inflamatória aguda causada por agente não infeccioso que entra no segmento anterior, resultando em lesão celular tóxica com necrose e apoptose mediado por resposta imunológica. Neste relato de caso de STSA são enfatizadas as causas mais comuns para o aparecimento da síndrome, apontam para os cuidados que devem ser tomados no processo de esterilização do material cirúrgico além de revisar a melhor conduta diante desses casos. Em conclusão notou-se que o foco principal deve ser a prevenção, pois o tratamento busca apenas suprimir a resposta inflamatória secundária. O tratamento nos casos de STSA consiste em intensa instilação de esteróides tópicos com seguimento rigoroso e controle de complicações tardias como o glaucoma.

Cross-linking e segmento de anel corneano intraestromal

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Adimara da Candelaria Renesto

2011-02-01

Full Text Available O cross-linking corneano é um procedimento usado para a estabilização mecânica e aumento da rigidez corneana em pacientes com ceratocone (reduzindo a possibilidade de progressão, e também em processos inflamatórios de afinamento corneano. Os segmentos de anéis corneanos intraestromais têm como princípio o aplanamento central da córnea. Inicialmente utilizados para correção de baixa miopia, a principal indicação atual é em pacientes com ceratocone, para melhorar a acuidade visual não corrigida, a acuidade visual corrigida e permitir uma melhor tolerância ao uso de lentes de contato como também retardar a necessidade de um transplante de córnea. O objetivo deste artigo é revisar algumas publicações relacionadas ao cross-linking corneano e à inserção do segmento de anel intraestromal, apresentando suas indicações, resultados e complicações relatadas até o momento.

Intraocular (Eye) Melanoma—Health Professional Version

Science.gov (United States)

Intraocular (uveal) melanoma of the uveal tract (iris, ciliary body, and choroid), though rare, is the most common primary intraocular malignancy in adults. Find evidence-based information on intraocular melanoma treatment.

ANÁLISIS DEL SEGMENTO DE LA TELEFONÍA MÓVIL EN MÉXICO: IUSACELL

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Miguel Angel Ixtláhuac-Baumbach

2015-04-01

Full Text Available El objetivo de este trabajo es analizar la industria de las telecomunicaciones concentrándonos en el segmento de la telefonía móvil en México y en el papel que la empresa Iusacell juega en éste. Se toma como punto de partida la teoría basada en la industria para la gestión estratégica empresarial, mediante el análisis de la concentración que este mercado de competencia oligopólica presenta. Los métodos utilizado para determinar el nivel de concentración son el Índice de Herfidal y Hirschmann (2012, así como el Índice de Dominancia (1999, posteriormente se analizan los resultados obtenidos, mismos con los que se hace uso de la teoría de juegos para determinar posibles estrategias que puedan ayudar a la empresa en cuestión a expandir su mercado o en el proceso de planeación estratégica, los cuales pueden ser atendidos por los administradores de la firma.

Evaluación del espesor corneal central y su influencia en la presión intraocular en pacientes del Hospital "Dr. Miguel Enríquez" Evaluation of the central corneal thickness and its impact on the intraocular pressure of patients in "Dr. Miguel Enriquez" hospital

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María Teresa Arrronte Alarcón

2012-01-01

Full Text Available Objetivo: evaluar el espesor corneal central en sujetos sanos, hipertensos oculares, sospechosos de glaucoma y glaucomatosos, y su influencia en la presión intraocular. Métodos: se realizó un estudio descriptivo y transversal que incluyó 708 ojos de 356 sujetos que acudieron al servicio de oftalmología del Hospital Universitario "Dr. Miguel Enríquez" entre enero y diciembre de 2010. A los pacientes se les midió el espesor corneal central con paquimetría ultrasónica (paquímetro US 4000. El resto de la información se obtuvo a partir de las historias clínicas de los pacientes. Resultados: Los hipertensos oculares presentaron córneas gruesas (p=0,07; el mayor número de casos que tenían diagnóstico de sospecha de glaucoma y de glaucoma primario de ángulo abierto presentaron un grosor corneal delgado (p=0,62 y p=0,08 respectivamente. Si no se hubiese tenido en cuenta el factor de corrección para evaluar la presión intraocular se encontraría 48,1 % de los glaucomatosos y 31,5 % de los hipertensos oculares con diagnóstico inadecuado (pObjective: to evaluate the central corneal thickness in healthy individuals, in persons with ocular hypertension, and in suspected glaucoma and glaucomatous people, and its influence in intraocular pressure. Methods: a cross-sectional and descriptive study was performed in 708 eyes from 356 people who had been seen at ophthalmology service of “Dr. Miguel Enríquez”, university hospital from January to December, 2010. Their central corneal thickness was measured with ultrasonic pachymetry (pachymeter US 4000. The rest of the information came from the clinical histories of the patients. Results: Most of the ocular hypertensives presented thick corneas (p=0,07; a high number of cases that had diagnosis of glaucoma suspicion and primary open-angle glaucoma showed thin corneas (p=0,62 and (p=0,08 respectively. If the correction factor to evaluate the IOP had not been considered, then 48,1 % of the

Uma proposta para o uso da música no segmento do turismo rural

OpenAIRE

Vilela, Ivan

2013-01-01

O presente ensaio sugere propostas de uso da música no segmento do Turismo Rural, além de questionar as práticas atuais de imposição cultural efetivadas pelos mass media. Através de um breve levantamento histórico-cultural do povo brasileiro, questionamos o porquê de não utilizarmos elementos das culturas locais do Brasil no referido segmento. Sugerimos também alternativas de inclusão das potencialidades musicais locais brasileiras como forma de diferenciação dessas instituições voltadas ao t...

[Correlation of intraocular pressure variation after visual field examination with 24-hour intraocular pressure variations in primary open-angle glaucoma].

Science.gov (United States)

Noro, Takahiko; Nakamoto, Kenji; Sato, Makoto; Yasuda, Noriko; Ito, Yoshinori; Ogawa, Shumpei; Nakano, Tadashi; Tsuneoka, Hiroshi

2014-10-01

We retrospectively examined intraocular pressure variations after visual field examination in primary open angle glaucoma (POAG), together with its influencing factors and its association with 24-hour intraocular pressure variations. Subjects were 94 eyes (52 POAG patients) subjected to measurements of 24-hour intraocular pressure and of changes in intraocular pressure after visual field examination using a Humphrey Visual Field Analyzer. Subjects were classified into three groups according to the magnitude of variation (large, intermediate and small), and 24-hour intraocular pressure variations were compared among the three groups. Factors influencing intraocular pressure variations after visual field examination and those associated with the large variation group were investigated. Average intraocular pressure variation after visual field examination was -0.28 ± 1.90 (range - 6.0(-) + 5.0) mmHg. No significant influencing factors were identified. The intraocular pressure at 3 a.m. was significantly higher in the large variation group than other two groups (p field examination. Increases in intraocular pressure during the night might be associated with large intraocular pressure variations after visual field examination.

Efecto de las prácticas agronómicas en las propiedades del suelo en laderas

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Claro A. Alfonso

2000-01-01

Full Text Available Efecto de las prácticas agronómicas en las propiedades del suelo en laderas. En un suelo Ultisol de textura arenosa, fuertemente erosionado, de baja fertilidad en fósforo, materia orgánica y ácido, ubicado en la localidad de La Leña en la provincia de Pinar del Río, en la República de Cuba, se realizó durante el año 1996 un ensayo en dos segmentos de microcuencas, en las que se implementaron medidas de conservación de suelos consistentes en barreras vivas de Gliricidia sepium L. (primer segmento y Vetiveria zizanoide L. (segundo segmento complementadas con coberturas de maíz asociado con Mucuna d. y Canavalia e., como precedentes del frijol. Los resultados mostraron ligeros cambios de la pendiente intrabarreras con respecto al valor inicial (10 y 9%. Los valores de la biomasa seca total de las asociaciones fueron de 17 y 15 t/ha, la velocidad de cubrimiento a los 30 días fue mayor al 70%, la colonización radical profusa presentada por las asociaciones indican una mejora de la red poral del suelo, reflejándose en la tendencia positiva del estado interno de la estructura que evoluciona hacia un estado (G poroso. Los rendimientos de maíz fueron de 2900 y 2500 kg/ha y los de frijol de 1800 y 1630 kg/ha. Valores considerados elevados, si se tiene en cuenta el grado de deterioro de este suelo

INTELIGENCIA COMPETITIVA: PROPUESTA DE MODELO SISTEMICO COMO CAMBIO ORGANIZACIONAL PARA LOS HOSPITALES DEL SUR DEL BRASIL

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Nilda, Tañski

2011-01-01

Full Text Available El éxito de una organización depende cada vez más, de la estrategia de su negocio. Un componente estructural de la estrategia es el ajuste entre sus actividades primarias y sus actividades de soporte. Y así como en la industria, en un hospital, una nueva estrategia para ser implementada en general implica revisar procesos de negocios o introducir nuevas formas de ejecutar las operaciones de la empresa. Sin embargo, organizaciones que tengan problemas de alienación entre la estrategia de negocios con su infraestructura de Tecnología de Información tendrán dificultades de implantar un modelo sistémico del proceso de inteligencia competitiva. Se cree que el segmento hospitalario privado tiene problemas de sincronismo entre la estrategia de negocios con la infraestructura de Tecnología de la Información (TI. Por lo tanto, se puede cuestionar: ¿Un modelo sistémico de Inteligencia Competitiva para el segmento hospitalario privado, puede ser un modelo conceptual del proceso de cambio, pasible de ser implementado en este tipo de organización? El objetivo principal de este trabajo de investigación es proponer un Modelo Sistémico del proceso de Inteligencia Competitiva versión 2, en los hospitales privados de la región sur de Brasil.

Divulgação de Informações por Segmento: Panorama da Aplicação do CPC 22

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Valdirene Gasparetto

2013-06-01

Full Text Available O objetivo da pesquisa foi traçar um panorama da divulgação de segmentos nas demonstrações financeiras das companhias abertas que operam no Brasil, publicadas em 2010, primeiro ano de vigência do CPC 22. Para isso procurou-se identificar como foram definidos e quantos são os segmentos publicados, além de analisar tais resultados em relação a características corporativas da empresa: tamanho, setor de atuação e status de listagem da companhia nos níveis de governança corporativa. Trata-se de pesquisa bibliográfica e documental com foco descritivo. O levantamento dos dados foi realizado em notas explicativas de 81 companhias abertas selecionadas entre as maiores empresas, na edição 2010 da Revista Melhores e Maiores. A análise dos dados foi realizada com estatística descritiva e análise de correlação. Os resultados da pesquisa mostraram que há empresas que não fizeram qualquer referência a informações por segmentos. A definição dos segmentos atendeu predominantemente ao critério de linha de negócios, e 27% das companhias agruparam as atividades em um único segmento. A análise da correlação mostrou que somente o tamanho do ativo apresentou relacionamento significante e positivo com as características de definição e quantidade de segmentos publicados. Constatou-se que há grande heterogeneidade nas estruturas dos relatórios por segmento publicados.

Diagnóstico y propuesta de plan de mejoramiento en el área financiera para el Sistema de Cooperativas de Ahorro y Crédito del Segmento Uno, reguladas por la Superintendencia de Economía Popular y Solidaria, durante el período 2011- 2014

OpenAIRE

Pacheco Guevara, Ximena Patricia

2016-01-01

La presente investigación se enfoca en una propuesta de mejora en el área financiera para el sistema de cooperativas de ahorro y crédito del segmento uno, reguladas por la Superintendencia de Economía Popular y Solidaria, durante el período 2011-2014. Bajo este contexto, se revisaron una serie de metodologías aplicadas a nivel internacional, definiendo la creada por el Consejo Mundial de Cooperativas de Ahorro y Crédito WOCCU como la más apropiada, al analizar específicamente cooperativas de ...

Uma proposta para o uso da música no segmento do turismo rural

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Ivan Vilela

2013-01-01

Full Text Available O presente ensaio sugere propostas de uso da música no segmento do Turismo Rural, além de questionar as práticas atuais de imposição cultural efetivadas pelos mass media. Através de um breve levantamento histórico-cultural do povo brasileiro, questionamos o porquê de não utilizarmos elementos das culturas locais do Brasil no referido segmento. Sugerimos também alternativas de inclusão das potencialidades musicais locais brasileiras como forma de diferenciação dessas instituições voltadas ao turismo rural dentro do mercado.

Plan de gestión del turismo de reuniones para la satisfacción del visitante de Chiclayo

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Serruto Perea, Elvis

2017-01-01

El turismo de reuniones adquiere gran importancia en el desarrollo turístico de una ciudad por sus beneficios económicos y sociales. La presente tesis tiene como objetivo diseñar un plan de gestión del turismo de reuniones identificando los recursos turísticos necesarios para lograr la satisfacción del visitante en la ciudad de Chiclayo. Mediante entrevistas a expertos y encuestas realizadas, se logró realizar un análisis de la demanda y oferta para el segmento de turismo de reuniones. La in...

Intraocular lymphoma

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Li-Juan Tang

2017-08-01

Full Text Available Intraocular lymphoma (IOL is a rare lymphocytic malignancy which contains two main distinct forms. Primary intraocular lymphoma (PIOL is mainly a sub-type of primary central nervous system lymphoma (PCNSL. Alternatively, IOL can originate from outside the central nervous system (CNS by metastasizing to the eye. These tumors are known as secondary intraocular lymphoma (SIOL. The IOL can arise in the retina, uvea, vitreous, Bruch’s membrane and optic nerve. There are predominantly of B-cell origin; however there are also rare T-cell variants. Diagnosis remains challenging for ophthalmologists and pathologists, due to its ability to masquerade as noninfectious or infectious uveitis, white dot syndromes, or occasionally as other metastatic cancers. Laboratory tests include flow cytometry, immunocytochemistry, interleukin detection (IL-10: IL-6, ratio >1, and polymerase chain reaction (PCR amplification. Methotrexate-based systemic chemotherapy with external beam radiotherapy and intravitreal chemotherapy with methotrexate are useful for controlling the disease, but the prognosis remains poor. Therefore, it is important to make an early diagnose and treatment. This review is focused on the clinical manifestations, diagnosis, treatment and prognosis of the IOL.

Bloqueio extraconal para facectomia com implante de lente intra-ocular: influência do fentanil associado ao anestésico local na qualidade do bloqueio e na analgesia pós-operatória Bloqueo extraconal para facectomia con implantación de lente intra-ocular: influencia del fentanil asociado al anestésico local en la calidad del bloqueo y en la analgesia pos-operatoria Extraconal block for cataract extraction surgery with implantation of intraocular lens: contribution of fentanyl associated to local anesthetics for quality of block and postoperative analgesia

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Daniel Espada Lahoz

2003-09-01

melhorou a qualidade do bloqueio quanto à motilidade do músculo reto medial e diminuiu a necessidade de analgésicos no pós-operatório.JUSTIFICATIVA Y OBJETIVOS: La anestesia locorregional para cirugías oftalmológicas ofrece ventajas, como: mínimas alteraciones fisiológicas, anestesia completa, bloqueo de los reflejos oculares, pequeña incidencia de náuseas y vómitos, menor tiempo de recuperación y analgesia pos-operatoria. La preocupación constante con la calidad del bloqueo, así como la abordaje de la analgesia pos-operatoria debe quedar bajo la responsabilidad del anestesiologista. El objetivo de este estudio fue evaluar si el fentanil contribuye en la calidad del bloqueo extraconal y en la analgesia pos-operatoria de facectomias con implantación de lente intra-ocular. MÉTODO: Se estudió la asociación del fentanil y bupivacaína a 0,75% en la calidad del bloqueo ocular y en la analgesia pos-operatoria en 164 pacientes sometidos a facectomia con implantación de lente intra-ocular (técnica extracapsular, de ambos sexos con homogeneidad de parámetros antropométricos, ojo operado, clasificación del estado físico (ASA e índice de riesgo cardíaco de Goldman. Los pacientes fueron distribuidos en dos grupos (82 pacientes en cada grupo por sorteo de forma aleatoria, con y sin fentanil. Se evaluó la calidad del bloqueo por: aparecimiento de dolor en el per-operatorio, manutención de movimentación de los párpados o del globo ocular, persistencia del reflejo de Bell, número de bloqueos realizados para la obtención de condiciones quirúrgicas y evaluación del bloqueo por el cirujano. La analgesia pos-operatoria fue evaluada por la necesidad de complementación analgésica por el paciente. RESULTADOS: Fentanil asociado a la solución anestésica en el bloqueo extraconal aumentó significativamente el bloqueo del músculo recto medial (con fentanil - 17,1%, sin fentanil - 32,9% y diminuyó el consumo de analgésicos en el período pos-operatorio (uso

Estudio del uso de información prosódica en reconocimiento del locutor en ámbito forense

OpenAIRE

Fernández Pozo, Rubén; Fombella Mourelle, Carlos; Toledano, Doroteo T.; López Gonzalo, Eduardo; Hernández Gómez, Luis

2006-01-01

Actas de las IV Jornadas de Tecnología del Habla (JTH 2006) En este trabajo se realiza un estudio de un conjunto de técnicas que hacen uso de la información prosódica aplicadas a la verificación de locutor dentro del campo de la Acústica Forense. Esta información ha sido aplicada siguiendo dos enfoques. Por un lado, se han implementado herramientas de modelado de lenguaje de la secuencia de segmentos obtenidos de la evolución de f0 y energía. Por otro lado, se han estudiado las posibilidad...

Estudio descriptivo, analítico y predictivo de las heridas perforantes del bulbo ocular Descriptive, analytical and predicitive study of the stab wounds of the bulbus oculi

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Rosa Idalmis González Delgado

2001-06-01

Full Text Available Se realizó el estudio descriptivo, analítico y predictivo de 163 pacientes (165 ojos con heridas perforantes del bulbo ocular sin cuerpo extraño intraocular (CEIO. Los lesionados se agruparon en 2 tipos de heridas: simple y contusas; de ellas 36 fueron heridas simples y129 heridas con contusión asociada. Los autores aplicaron en el estudio de las heridas de ambos grupos los métodos clínicos de ayuda al diagnóstico de las lesiones provocadas por el traumatismo perforante con el estudio ultrasonográfico y los estudios electrofisiológicos (ERG y PEV. Se pudo valorar en el estudio la efectividad de ambos métodos asociados al método clínico óptico-instrumental como elementos que permitieron establecer un alto porcentaje de los casos, un diagnóstico más preciso de las lesiones y ayudaron a establecer un pronóstico visual del lesionado. Sobresaliendo con esta metodología de estudio lesiones predominantes en el nivel del segmento anterior y del posterior en los dos tipos de heridas. Fue valorado el comportamiento de la agudeza visual antes y después del tratamiento en los dos grupos de heridas, obteniéndose los peores resultados en las heridas con contusión asociada y ubicadas en el segmento posterior y que presentaban un tamaño mayor que 5 mm. Pudo apreciarse cómo las heridas pequeñas tuvieron mejores resultados en la función visual independientemente de su localización topográfica. A los resultados más relevantes en el estudio clínico descriptivo (variables de interés clínico se les aplicó métodos estadísticos y se seleccionaron los que tuvieron una alta significación. Se confeccionó un índice de predicción aproximado. Los autores muestran el índice de predicción en forma de ecuación matemática para ser aplicado en los traumatismos perforantes del bulbo ocular.A descriptive, analytical, and descriptive study on 163 patients (165 eyes with perforating wounds of bulbus oculi without intraocular foreign body (IOFB

Análisis multivariado del dimorfismo sexual en doce etnias del Gran Chaco

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Marcellino, Alberto José

2002-01-01

Full Text Available Se ensaya el cálculo de las distancias morfológicas para cuantificar el dimorfismo antropométrico sexual en distintas etnias aborígenes. Paralelamente se investiga: a- el grado de las diferencias entre los dimorfismos de los segmentos cefálico y postcefálico; b- los resultados con distintas combinaciones de variables, redundantes y no redundantes; c- la magnitud de participación de "forma" y "tamaño" en la distancia "total". Las distancias se calcularon mediante los algoritmos de Penrose (1954. El material utilizado fueron los datos antropométricos (inéditos correspondientes a 890 varones y 844 mujeres, obtenidos por Jehan A.Vellard, en 12 etnias del Gran Chaco Sudamericano. Las conclusiones indican: 1 la sensibilidad discriminatoria del procedimiento; 2 el segmento corporal postcefálico proporciona valores de dimorfismo notoriamente más altos que el cefálico en 11 de las 12 etnias investigadas, siendo los Ayoreo la única en que ambas distancias resultan iguales; 3 el dimorfismo sexual antropométrico está dado por el componente "tamaño" más que por el componente "forma", en proporciones cuyo rango aproximado es de 3:1 a 1:0; 4 se indica la combinación más apta para calcular el dimorfismo somatométrico "global" (cefálico+postcefálico que consta de 14 dimensiones, sin redundancia; 5 se plantea la hipótesis de que la razón dimorfismo cefálico/dimorfismo corporal postcefálico se vincularía, en relación inversa, al grado de mestización del grupo.

Comportamiento del mercado turístico extranjero en el Caribe Mexicano

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Dr. Francisco J. Güemes-Ricalde

2009-11-01

Full Text Available El Caribe mexicano atrae visitantes de regiones distintas en diferentes épocas del año. A los prestadores de servicios turísticos les resulta difícil conocer y separar las preferencias de actividades que realizan los visitantes de cada país. Arriban visitantes mexicanos y extranjeros, las preferencias de estos últimos en relación a la demanda de servicios son diferentes. Contrario a lo que se conocía, el estudio de mercado determinó que la demanda mexicana representa un mercado importante en marcadas épocas del año. Se calcula que cada año alrededor de dos millones de turistas nacionales arriban a la Riviera y Costa Maya en la región norte de Quintana Roo. Conocer las preferencias de consumo de los diferentes segmentos de turistas y la forma en que evalúan la posibilidad de demandar los servicios turísticos da la pauta para ofrecérselos en forma diferenciada y adecuada a cada segmento y en relación a cada una de las diversas actividades turísticas que realizan, entre ellas el ecoturismo de la cual poco se conoce en esta región del país.

Cicloturistas na Estrada Real: Perfil, Forma de Viagem e Implicações Para o Segmento

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Nelson Antônio Quadros Vieira Filho

2011-05-01

Full Text Available Este artigo pretende contribuir para a discussão do cicloturismo e suas especificidades como segmento turístico, a partir de um estudo de caso dos cicloturistas na Estrada Real, Minas Gerais, Brasil. O trabalho realizado objetiva caracterizar o perfil socioeconômico dos viajantes da rota turística, suas formas de viagem e suas necessidades enquanto turistas. As discussões teóricas desta pesquisa abordam os temas da segmentação turística e cicloturismo. A metodologia da pesquisa envolveu análise de entrevistas semi-estruturadas, realizadas com 28 cicloturistas, que percorreram trechos da Estrada Real, no ano de 2007, e também observação participante, a partir de viagem com um dos entrevistados, na rota turística, em Outubro de 2007. Este estudo revela as qualidades do segmento cicloturismo, que podem beneficiar tanto os turistas quanto os residentes e suas regiões. No entanto, para que o fluxo de cicloturistas seja relevante para os destinos, conclui-se ser necessário o planejamento da oferta turística em função das necessidades desse segmento.

Viability of a jejunal segment after neovascularization by omentoenteropexy Viabilidade de segmento jejunal neovascularizado por omentoenteropexia

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Mércia Maria Braga Rocha

2002-01-01

Full Text Available Omentoenteropexy was developed as an alternative technique to promote neovascularization in an isolated bowel segment. OBJECTIVE: The aim of the present protocol was to study the long-term viability of an isolated jejunal segment following neovascularization by omentoenteropexy. Long-term survival of a neovascularized bowel segment is an indication that the utilization of this segment as an intestinal graft can be successful. METHODS: To test the proposed surgical technique, 13 Wistar rats were subjected to laparotomy, the jejunum was exposed at 20 cm from the angle of Treitz and a pedicle of greater omentum was isolated. An incision of 6 cm was made along the antimesenteric jejunal border, exposing the submucosa. Omentoenteropexy was performed between the incision of the jejunum and the pedicle of the greater omentum. After seven weeks, the mesentery of the jejunal segment subjected to omentoenteropexy was ligated and isolated from the rest of the jejunum by a complete proximal and distal transversal section. Subsequently, an end-to-end anastomosis was performed to restore the continuity of the bowel. RESULTS: At 10 weeks from the first surgical intervention, the isolated jejunal segment subjected to omentoenteropexy was completely neovascularized and viable. CONCLUSION: No evidence of anatomical or functional intestinal obstruction was observed.A omentoenteropexia foi desenvolvida como uma alternativa para técnica de neovascularização em segmentos intestinais isolados, evidenciando algumas vantagens em relação a utilização de órgãos previamente descritos. OBJETIVO: Avaliar a viabilidade de um segmento jejunal neovascularizado por omentoenteropexia. MÉTODOS: Treze ratos Wistar foram submetidos a laparotomia, com exposição do jejuno vinte centímetros após o ligamento de Treitz e obtenção de um pedículo de omento. Na borda antimesentérica do jejuno foi feita uma incisão de seis centímetros com exposição da submucosa intacta

Intraocular inflammation in autoimmune diseases.

Science.gov (United States)

Pras, Eran; Neumann, Ron; Zandman-Goddard, Gisele; Levy, Yair; Assia, Ehud I; Shoenfeld, Yehuda; Langevitz, Pnina

2004-12-01

The uveal tract represents the vascular organ of the eye. In addition to providing most of the blood supply to the intraocular structures, it acts as a conduit for immune cells, particularly lymphocytes, to enter the eye. Consequently, the uveal tract is represented in many intraocular inflammatory processes. Uveitis is probably a misnomer unless antigens within the uvea are the direct targets of the inflammatory process. A better term of the condition is "intraocular inflammation" (IOI). To review the presence of IOI in autoimmune diseases, the immunopathogenic mechanisms leading to disease, and treatment. We reviewed the English medical literature by using MEDLINE (1984-2003) employing the terms "uveitis," "intraocular inflammation," and "autoimmune diseases." An underlying autoimmune disease was identified in up to 40% of patients with IOI, and included spondyloarthropathies, Behcets disease, sarcoidosis, juvenile chronic arthritis, Vogt-Koyanagi-Harada syndrome (an inflammatory syndrome including uveitis with dermatologic and neurologic manifestations), immune recovery syndrome, and uveitis with tubulointerstitial disease. The immunopathogenesis of IOI involves enhanced T-cell response. Recently, guidelines for the use of immunosuppressive drugs for inflammatory eye disease were established and include: corticosteroids, azathioprine, methotrexate, mycophenolate mofetil, cyclosporine, tacrolimus, cyclophosphamide, and chlorambucil. New therapies with limited experience include the tumor necrosis factor alpha inhibitors, interferon alfa, monoclonal antibodies against lymphocyte surface antigens, intravenous immunoglobulin (IVIG), and the intraocular delivery of immunosuppressive agents. An underlying autoimmune disease was identified in up to 40% of patients with IOI. Immunosuppressive drugs, biologic agents, and IVIG are employed for the treatment of IOI in autoimmune diseases.

Calidad visual en pacientes con lente intraocular multifocal modelo OcuFlex operados de catarata The quality of vision in patients operated on from cataract and implanted with OcuFlex multifocal intraocular lenses

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Eneida Pérez Candelaria

2010-01-01

Full Text Available OBJETIVO: Describir la calidad visual en 8 pacientes operados de catarata bilateral con la técnica de Faco-chop e implante de lente intraocular multifocal modelo OcuFlex, en el ICO "Ramón Pando Ferrer", desde septiembre 2007 a febrero 2008. MÉTODOS: Se realizó un estudio observacional, descriptivo, longitudinal y prospectivo para lo cual se analizaron variables como equivalente esférico, sensibilidad al contraste en el preoperatorio y posoperatorio; fenómenos visuales, centrado y localización del lente intraocular, así como el estado de satisfacción subjetiva de los pacientes. Se utilizó la estadística descriptiva con ayuda del sistema Microsoft Excel y Word 2003, para Windows XP. RESULTADOS: El equivalente esférico medio posoperatorio fue -0,59 tanto para frecuencias bajas como medias, en visión binocular la sensibilidad al contraste media fue de 1,12 unid.log en el preoperatorio y de 1,74 unid.log. en el posoperatorio. Por biomicroscopia con lámpara de hendidura en el 100 % de los casos el lente intraocular estaba centrado y por biomicroscopia ultrasónica el 93,75 % se encontraba en el saco capsular. Ningún paciente refirió la presencia de glare y solamente uno (12,5 % reportó visión de halos nocturnos. La totalidad de los pacientes se manifestaron satisfechos. CONCLUSIONES: Los lentes multifocales disminuyen la dependencia de las gafas después de la cirugía de catarata, razón por la que constituye una buena opción en la recuperación de la función visual óptima.OBJECTIVE: To describe the quality of vision in 8 patients, who were operated on from bilateral cataract using Phaco-chop technique and implanted with Ocuflex multifocal intraocular lens in "Ramón Pando Ferrer" Cuban Institute of Ophthalmology from September 2007 to February 2008. METHODS: A prospective, longitudinal, observational and descriptive study was made in which the variables spheral equivalent, contrast sensitivity in the pre- and post

21 CFR 886.3600 - Intraocular lens.

Science.gov (United States)

2010-04-01

... DEVICES OPHTHALMIC DEVICES Prosthetic Devices § 886.3600 Intraocular lens. (a) Identification. An intraocular lens is a device made of materials such as glass or plastic intended to be implanted to replace the natural lens of an eye. (b) Classification. Class III. (c) Date PMA or notice of completion of a...

21 CFR 886.4275 - Intraocular fluid.

Science.gov (United States)

2010-04-01

... DEVICES OPHTHALMIC DEVICES Surgical Devices § 886.4275 Intraocular fluid. (a) Identification. An intraocular fluid is a device consisting of a nongaseous fluid intended to be introduced into the eye to aid... section 515 of the act is required before this device may be commercially distributed. See § 886.3. ...

Evaluación del efecto de Lactobacillus spp. en el desarrollo del intestino delgado en pollos de engorde

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Sandra Paola Rodríguez-González

2016-01-01

Full Text Available Los probióticos del tipo Lactobacillus spp. son considerados alternativas promisorias para reemplazar los antibióticos como promotores de crecimiento (APC en las explotaciones avícolas, ya que influyen en el desarrollo poseclosión del tracto gastrointestinal (TGI y en su ecología microbiana. En este estudio se evaluó la morfometría del intestino delgado en pollos de engorde al suministrar 0.5mL/L de un producto comercial a base de Lactobacillus spp. Se utilizaron 200 pollos machos de un día de edad, de la línea Avian Cobb 48, los cuales se distribuyeron, con un diseño completamente al azar, en dos grupos, denominados control y experimento; ambos grupos fueron mantenidos en condiciones similares de alimentación, manejo y sanidad. A los días 7, 15 y 35 de edad se realizó el sacrificio y la necropsia; se disectaron segmentos de duodeno, yeyuno e íleon para su procesamiento con la técnica de coloración de Hematoxilina-Eosina (HE. Los cambios morfométricos de longitud, ancho y cantidad de vellosidades fueron evaluados utilizando un microscopio trinocular con cámara digital Moticam®. Los datos se analizaron usando el programa SPSS versión 19; se realizaron comparaciones de los promedios a través de estadística descriptiva y una prueba ANOVA (p<0,05; se observaron diferencias estimadas significativas (p<0,05 a favor del grupo experimento en el desarrollo poseclosión de los segmentos yeyuno e íleon.

A Case Report of Intraocular Metastasis Treated with Radiotherapy

Energy Technology Data Exchange (ETDEWEB)

Kim, Ok Bae; Byun, Sang Jun; Kim, Kwang Soo; Kim, Jin Hee [Keimyung University School of Medicine, Daegu (Korea, Republic of); Lee, Ho Jun [Daegu Catholic University School of Medicine, Daegu (Korea, Republic of)

2009-09-15

Intraocular metastasis is the most common malignancy of the eye. The frequency of intraocular metastasis in all the patients dying of cancer is about 12% and ocular metastases will be detected more frequently in the future because the patients with malignant tumor are now living longer. Intraocular metastasis can cause a serious clinical problem such as blindness. The early recognition and treatment of intraocular metastasis are very important clinical oncologic issues to maintain vision and to maximize the quality of life. However, significance of intraocular metastasis is still under-evaluated for practicing oncologists. External beam radiotherapy is a safe, effective palliative treatment in terms of preserving both the vision and the eye globe.

21 CFR 886.4270 - Intraocular gas.

Science.gov (United States)

2010-04-01

... DEVICES OPHTHALMIC DEVICES Surgical Devices § 886.4270 Intraocular gas. (a) Identification. An intraocular gas is a device consisting of a gaseous fluid intended to be introduced into the eye to place pressure... required. As of May 28, 1976, an approval under section 515 of the act is required before this device may...

Análisis comparativo de la estructura del canto del anuncio de tres poblaciones de Melanophryniscus rubriventris (Vellar, 1947 (Anura: Bufonidae

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Ferrari, Liliana

2008-02-01

Full Text Available La estructura de la señal acústica en anuros ha sido considerada especie-específica y utilizada incluso para el reconocimiento de nuevas especies indistinguibles por caracteres morfológicos. En este trabajo, presentamos una descripción de la estructura del canto de Melanophryniscus rubriventris y un análisis comparativo de parámetros espectrales y temporales del canto de anuncio en tres poblaciones argentinas, cada una de ellas asignadas a una de las tres subespecies tradicionalmente reconocidas. El canto de anuncio emitido por los machos de M. rubriventris puede describirse como un trino agudo formado por dos segmentos: el primero está compuesto por una serie de emisiones cortas, aisladas y no pulsadas seguidas por el segundo segmento que conforma un trino rápido con una frecuencia constante de pulsos. La estructura del canto en dos segmentos coincide con las descripciones realizadas para otras cinco especies del género, pero difiere en los componentes temporales y espectrales. Las comparaciones de los cantos de las distintas poblaciones estudiadas de M. rubriventris no revelan ninguna diferencia significativa. Estas evidencias no parecen sustentar la existencia de subespecies ni que se deban efectuar cambios en el status específico de las poblaciones argentinas. The structure of the acoustic signal in anurans has been considered species-specific and used even for the recognition of new indistinguishable species by morphologic characters. In this work, we presented a description of the structure of the call of Melanophryniscus rubriventris and a comparative analysis of spectral and temporal parameters of the advertisement call in three Argentine populations assigned to three traditionally recognized subspecies. The call emitted by males of M. rubriventris can be described like an acute trill formed by two segments: a first segment with a series of short, unpulsed isolated emissions followed by the second segment: a fast trill of a

Piggyback intraocular lens implantation to correct pseudophakic refractive error after segmental multifocal intraocular lens implantation.

Science.gov (United States)

Venter, Jan A; Oberholster, Andre; Schallhorn, Steven C; Pelouskova, Martina

2014-04-01

To evaluate refractive and visual outcomes of secondary piggyback intraocular lens implantation in patients diagnosed as having residual ametropia following segmental multifocal lens implantation. Data of 80 pseudophakic eyes with ametropia that underwent Sulcoflex aspheric 653L intraocular lens implantation (Rayner Intraocular Lenses Ltd., East Sussex, United Kingdom) to correct residual refractive error were analyzed. All eyes previously had in-the-bag zonal refractive multifocal intraocular lens implantation (Lentis Mplus MF30, models LS-312 and LS-313; Oculentis GmbH, Berlin, Germany) and required residual refractive error correction. Outcome measurements included uncorrected distance visual acuity, corrected distance visual acuity, uncorrected near visual acuity, distance-corrected near visual acuity, manifest refraction, and complications. One-year data are presented in this study. The mean spherical equivalent ranged from -1.75 to +3.25 diopters (D) preoperatively (mean: +0.58 ± 1.15 D) and reduced to -1.25 to +0.50 D (mean: -0.14 ± 0.28 D; P < .01). Postoperatively, 93.8% of eyes were within ±0.50 D and 98.8% were within ±1.00 D of emmetropia. The mean uncorrected distance visual acuity improved significantly from 0.28 ± 0.16 to 0.01 ± 0.10 logMAR and 78.8% of eyes achieved 6/6 (Snellen 20/20) or better postoperatively. The mean uncorrected near visual acuity changed from 0.43 ± 0.28 to 0.19 ± 0.15 logMAR. There was no significant change in corrected distance visual acuity or distance-corrected near visual acuity. No serious intraoperative or postoperative complications requiring secondary intraocular lens removal occurred. Sulcoflex lenses proved to be a predictable and safe option for correcting residual refractive error in patients diagnosed as having pseudophakia. Copyright 2014, SLACK Incorporated.

A common humoral background of intraocular and arterial blood pressure dysregulation.

Science.gov (United States)

Skrzypecki, Janusz; Grabska-Liberek, Iwona; Przybek, Joanna; Ufnal, Marcin

2018-03-01

It has been postulated that intraocular pressure, an important glaucoma risk factor, correlates positively with arterial blood pressure (blood pressure). However, results of experimental and clinical studies are often contradictory. It is hypothesized that, in some hypertensive patients, disturbances in intraocular pressure regulation may depend on biological effects of blood borne hormones underlying a particular type of hypertension, rather than on blood pressure level itself. This review compares the effects of hormones on blood pressure and intraocular pressure, in order to identify a hormonal profile of hypertensive patients with an increased risk of intraocular pressure surge. The PUBMED database was searched to identify pre-clinical and clinical studies investigating the role of angiotensin II, vasopressin, adrenaline, noradrenaline, prostaglandins, and gaseous transmitters in the regulation of blood pressure and intraocular pressure. Studies included in the review suggest that intraocular and blood pressures often follow a different pattern of response to the same hormone. For example, vasopressin increases blood pressure, but decreases intraocular pressure. In contrast, high level of nitric oxide decreases blood pressure, but increases intraocular pressure. Arterial hypertension is associated with altered levels of blood borne hormones. Contradicting results of studies on the relationship between arterial hypertension and intraocular pressure might be partially explained by diverse effects of hormones on arterial and intraocular pressures. Further studies are needed to evaluate if hormonal profiling may help to identify glaucoma-prone patients.

Telefonía celular que genera valor al segmento medio del mercado

OpenAIRE

Delgado Carballido, Luis Alberto; Mazuelos Woolcott, Ricardo

2016-01-01

El presente estudio busca ofrecer al sector medio del mercado una propuesta enfocada en la satisfacción de sus necesidades de comunicación, con planes sencillos y un nivel de servicio superior para ayudar a mejorar las comunicaciones interpersonales, el crecimiento económico y la reducción de la pobreza. Tesis

21 CFR 886.4300 - Intraocular lens guide.

Science.gov (United States)

2010-04-01

...) MEDICAL DEVICES OPHTHALMIC DEVICES Surgical Devices § 886.4300 Intraocular lens guide. (a) Identification. An intraocular lens guide is a device intended to be inserted into the eye during surgery to direct... lenses, the device is exempt from the premarket notification procedures in subpart E of part 807 of this...

MICROPROPAGACIÓN DE CUATRO CULTIVARES DE ARÁNDANO (Vaccinium spp. A PARTIR DE SEGMENTOS FOLIARES DE DOS PROCEDENCIAS

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Arturo Brenes Angulo

2015-01-01

Full Text Available Los cultivares de arándano Sharpblue, Woodard, Bonita y Delite se propagaron a partir de secciones de hoja procedentes de explantes uninodales establecidos in vitro y de secciones de hoja directamente del campo. Los explantes se colocaron en medio WPM suplementado con 1, 5 mg.l -1 de TDZ para promover la brotación; luego se subcultivaron a medio fresco WPM suplementado con 0,5 ó 1,0 mg.l -1 de Zeatina, para promover el crecimiento de los brotes. Se determinó la longitud de la micromacolla y el número de brotes >2mm y >1cm por microma - colla. Brotes de 8-10 cm se cosecharon a las 8 semanas y se subcultivaron en WPM suple - mentado con 0, 1, 2, 4 u 8 mg.l -1 de AIB, para promover su enraizamiento; a las 10 semanas se trasplantaron a invernadero para aclimatización. Al cultivar los segmentos foliares en WPM con 1, 5 mg.l -1 de TDZ se formaron micromacollas en todas las variedades, independientemente de la procedencia de la hoja, con un efecto significati - vo del cultivar, la procedencia, del explante y la interacción cultivar x procedencia, para el núme - ro de brotes >2 mm obtenidos. El tamaño de la micromacolla varió significativamente según cultivares, procedencia del explante e interacción cultivares x procedencia x concentración de zea - tina, al trasferirse a un medio con 2 concentracio - nes del regulador de crecimiento, pero no hubo diferencias con respecto a éstas. El número de brotes > 2mm y la longitud del más largo variaron significativamente con el cultivar, y la interacción cultivar x procedencia del explante en WPM con 0,5 mg.l -1 de Zeatina. Explantes de Woodard a partir de vitrohoja produjeron el mayor número de brotes (44,70±13,34 y Delite de vitrohoja el menor (21,50±4,99. Los brotes subcultivados en WPM con diferentes concentraciones de AIB mostraron enraizamiento menor al 10% en todos los tratamientos. Sin embargo, al trasplantarse a invernadero se obtuvo 100% de enraizamiento, independientemente del

Modelo de gestión para cambio de plataforma tecnológica en entidades financieras.Caso específico Banco mediano del sector comercial

OpenAIRE

Sinmaleza Ramírez, Geoconda

2014-01-01

176 hojas : ilustraciones, 29 x 21 cm + CD-ROM 2163 La presente tesis corresponde a la implementación del Modelo de Gestión para el cambio de plataforma tecnológica en entidades financieras. Caso específico Banco mediano del sector comercial. El Banco en Análisis es una institución del sistema financiero nacional, clasificada por la Superintendencia de Bancos como un Banco mediano del segmento comercial, el mismo mantiene una alianza estratégica con un Banco de Alianza del sistema fina...

Comunicación política en la red social Facebook: segmento rusoparlante 

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M Pilgun

2015-11-01

Full Text Available Introducción. El presente artículo expone el análisis de las características de la comunicación política en el segmento rusoparlante de la red social Facebook a base de grupos políticamente activos y sus actores. Al contrario de lo habitual en los EEUU y otros países, los usuarios de blogs rusos prefieren plataformas que combinan elementos típicos de un blog y los de las redes sociales tipo Facebook. Los datos fueron recogidos en un momento político complicado para Rusia (rebeldía en Ucrania lo que avivó la actividad de la oposición rusa y los procesos manipuladores en las redes sociales rusas. Objetivos. El objetivo era clasificar los actores políticamente activos de Facebook ruso y analizar su comportamiento sociolingüístico. Metodología. Se efectuó un análisis interdisciplinar de los grupos políticos (N 200 y actores (N 291 durante enero-mayo 2014. Resultados. Según sus opiniones políticas los actores principales fueron clasificados como oficiales-gubernamentales, de oposición y nacionalistas y juzgando por su actividad como proyectores de espacio comunicativo, manipuladores, grafómanos y autores de Clusters locales. Su comportamiento comunicativo y verbal también ha sido analizado donde fueron identificadas identidades virtuales específicas compartidas. Discusión y conclusiones. Desde que las redes sociales están siendo utilizadas cada vez más con fines políticos el análisis de los procesos sociolingüísticos en las comunidades virtuales activas políticamente ha adquirido mucha importancia tanto en Rusia, como en el resto del mundo. Como la perspectiva del desarrollo futuro del presente estudio se contempla la detección de la relación entre la actividad comunicativa de los actores online y offline dentro de los grupos señalados.

Prevención y tratamiento actual del glaucoma

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DR. P. José Manuel Díaz

2010-11-01

Full Text Available El glaucoma es la principal causa de ceguera no reversible en el mundo, afectando al 2% de la población. Actualmente se considera una neuropatía óptica, donde la presión intraocular juega un rol fundamental en la patogenia y las características del daño óptico producido. Con el tratamiento actual, se busca prevenir el daño en la estructura del nervio óptico, para preservar el campo visual, persiguiendo mantener la calidad de vida del paciente. Existen nuevos métodos imaginológicos que junto al examen clínico y campo visual, predicen daño y avance de enfermedad. Se incluyen en la comprensión de la patología la apoptosis y el concepto de neuroprotección. Nuevos fármacos buscan mantener una adecuada reducción en la presión intraocular sin fluctuaciones, evitando efectos adversos y mejorando la adherencia al tratamiento. Nuevas herramientas terapéuticas como la trabeculoplastía selectiva láser y nuevas cirugías como el implante de tubos de drenaje, aumentan las posibilidades de evitar la ceguera por glaucoma.

DESIGN OF THE MULTIORDER INTRAOCULAR LENSES

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V. G. Kolobrodov

2015-01-01

Full Text Available Intraocular lenses (IOLs are used to replace the natural crystalline lens of the eye. Just few basic designs of IOLs are used clinically. Multiorder diffractive lenses (MODL which operate simultaneously in several diffractive orders were proposed to decrease the chromatic aberration. Properties analysis of MODL showed a possibility to use them to develop new designs of IOLs. The purpose of this paper was to develop a new method of designing of multiorder intraocular lenses with decreased chromatic aberration. The theoretical research of the lens properties was carried out. The diffraction efficiency dependence with the change of wavelength was studied. A computer simulation of MODL in a schematic model of the human eye was carried out. It is found the capability of the multiorder diffractive lenses to focus polychromatic light into a segment on the optical axis with high diffraction efficiency. At each point of the segment is present each component of the spectral range, which will build a color image in combination. The paper describes the new design method of intraocular lenses with reduced chromaticism and with endless adaptation. An optical system of an eye with an intraocular lens that provides sharp vision of objects located at a distance of 700 mm to infinity is modeled.

Lente intra-ocular multifocal difrativa apodizada: resultados Diffractive apodized multifocal intraocular lens: results

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Virgilio Centurion

2007-12-01

Full Text Available OBJETIVO: Mostrar os resultados visuais e refracionais com lente intra-ocular multifocal difrativa apodizada. MÉTODOS: Estudo de 100 olhos de 50 pacientes com catarata, submetidos à facoemulsificação com implante bilateral de lente intra-ocular (LIO multifocal difrativa apodizada. Foi avaliada a acuidade visual binocular sem e com correção para longe e perto, a previsibilidade refracional e a freqüência de uso de óculos. RESULTADOS: A acuidade visual sem correção para longe foi de e " 20/30 em 97,56% dos olhos operados e e" J2 em 100%, sendo que 82% dos pacientes nunca usam óculos e 16% usam de forma esporádica. CONCLUSÃO: A LIO multifocal difrativa apodizada mostrou ser uma opção previsível, reproduzível e segura na correção dos vícios de refração para longe e perto durante a cirurgia da catarata, permitindo elevado índice de independência ao uso de óculos.OBJECTIVE: To show visual and refraction results using multifocal diffractive apodized intraocular lens. METHODS: The study of 100 eyes of 50 patients with cataract, submitted to phacoemulsification with bilateral implant of multifocal diffractive apodized intraocular lens (IOL. Binocular visual acuity was evaluated with and without correction for near and distance, and refraction previsibility and frequency of wearing glasses. RESULTS: Visual acuity without correction for distance was e" 20/30 in 97.56% of eyes operated on and e" J2 in 100%, of these 82% of patients never wear glasses and 16% wear glasses sporadically. CONCLUSION: Multifocal diffractive apodized IOL proved to be a foreseeable option, reproducible and safe in the correction of refraction errors for distance and near during cataract surgery, enabling a high rate of independence from the use of glasses.

El sustrato histórico del euroescepticismo checo

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Daniel Esparza

2012-01-01

Full Text Available Este artículo examina el sustrato histórico del que se nutre el euroescepticismo checo. Se trata de un segmento apenas explorado que se aborda desde un marco teórico que estudia la relación entre la identidad nacional y el Otro. La identidad se construye a través de las sucesivas identificaciones "simbólicas e imaginarias" con Otros relevantes. Dichas identificaciones pueden ser tanto positivas como negativas. Para clasificar dichas identificaciones hacia la UE, cualitativamente, se proponen cuatro criterios básicos: "democracia", "economía", "seguridad" e "identidad nacional". Las fuentes utilizadas son los discursos del presidente Václav Klaus y los programas electorales del ODS y KSCM. Una de las conclusiones sugiere que las identifi caciones negativas hacia la UE están asociadas a reminiscencias de relaciones traumáticas con potencias del pasado, como la URSS, Alemania o el imperio Habsburgo.

A tomografia de córnea e segmento anterior na propedêutica do exame complementar na avaliação de ectasia

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Bruno de Freitas Valbon

2013-02-01

Full Text Available Descrevemos a importância da tomografia de córnea e segmento anterior na propedêutica do exame complementar na avaliação de ectasia. Esta descrição da interpretação clínica dos índices da tomografia de córnea e segmento anterior (Pentacam - Oculus, Wetzlar, Germany neste relato de caso, demonstra a relevância de uma nova tecnologia na avaliação da córnea e segmento anterior na suspeita de ceratocone. O diagnóstico de ceratocone foi excluído pela análise dos índices tomográficos de ectasia. Detectou-se assimetria entre os lados nasal e temporal por meio da avaliação do mapa de profundidade de câmara anterior. No exame biomicroscópico sob midríase foi constatado subluxação do cristalino, sendo assim devemos estar atentos não somente aos índices tomográficos corneanos na avaliação do exame complementar e sim analisarmos outros dados importantes oferecidos pela tomografia de córnea e segmento anterior.

Relation between intraocular pressure and size of transverse sinuses

Energy Technology Data Exchange (ETDEWEB)

Kantarci, Mecit; Onbas, Omer; Alper, Fatih; Okur, Adnan [Atatuerk University, Department of Radiology, Medical Faculty, Erzurum (Turkey); Dane, Senol; Gumustekin, Kenan [Atatuerk University, Department of Physiology, Medical Faculty, Erzurum (Turkey); Aslankurt, Murat [Atatuerk University, Department of Ophtalmatology, Medical Faculty, Erzurum (Turkey); Yazici, Ahmet Taylan [Beyoglu Goez Egitim ve Arastirma Hastanesi, Istanbul (Turkey)

2005-01-01

There are asymmetries in the sizes of transverse sinus and intraocular pressure. The purpose of this study was to investigate possible relationships between the asymmetry of transverse sinuses in TOF MR venography and intraocular pressures of right and left eyes. In this study, subjects were 63 male and 42 female medical school students, aged 18-21 years (mean{+-}SD; 19.72{+-}0.67 years). Subjects with neurological and ophthalmologic disease, particularly dural sinus thrombosis, myopia, trauma and glaucoma, were excluded the study. Subjects were divided into five groups according to the magnitudes of the right- and left-transverse sinuses in MR venography results. There is a functional relation between intraocular pressures of the right and left eyes and asymmetry of the transverse sinus. If the transverse sinus on one side is larger and its venous drainage is greater, the intraocular pressure of the eye on this side is lower. It can be speculated that the transverse sinus size may be associated with pathogenesis of diseases with increased intraocular pressure such as glaucoma. We aim to determine the relation between the size and drainage of transverse sinuses in TOF MR venography and intraocular pressure in patients with open-angle glaucoma in our next study. (orig.)

Relation between intraocular pressure and size of transverse sinuses

International Nuclear Information System (INIS)

Kantarci, Mecit; Onbas, Omer; Alper, Fatih; Okur, Adnan; Dane, Senol; Gumustekin, Kenan; Aslankurt, Murat; Yazici, Ahmet Taylan

2005-01-01

There are asymmetries in the sizes of transverse sinus and intraocular pressure. The purpose of this study was to investigate possible relationships between the asymmetry of transverse sinuses in TOF MR venography and intraocular pressures of right and left eyes. In this study, subjects were 63 male and 42 female medical school students, aged 18-21 years (mean±SD; 19.72±0.67 years). Subjects with neurological and ophthalmologic disease, particularly dural sinus thrombosis, myopia, trauma and glaucoma, were excluded the study. Subjects were divided into five groups according to the magnitudes of the right- and left-transverse sinuses in MR venography results. There is a functional relation between intraocular pressures of the right and left eyes and asymmetry of the transverse sinus. If the transverse sinus on one side is larger and its venous drainage is greater, the intraocular pressure of the eye on this side is lower. It can be speculated that the transverse sinus size may be associated with pathogenesis of diseases with increased intraocular pressure such as glaucoma. We aim to determine the relation between the size and drainage of transverse sinuses in TOF MR venography and intraocular pressure in patients with open-angle glaucoma in our next study. (orig.)

Acute Retention of Urine Following Intraocular Surgery | Nwosu ...

African Journals Online (AJOL)

Hyperosmolar agents and carbonic anhydrase inhibitors are used to lower the intraocular pressure and thus minimize the chances of vitreous loss during intraocular surgery. However, these agents could precipitate urinary retention. This is a report on two elderly men who had perioperative acute urinary retention following ...

Disritmias cardíacas e alterações do segmento ST em idosos no perioperatório de ressecção transuretral da próstata sob raquianestesia: estudo comparativo Disritmias cardíacas y alteraciones del segmento ST en ancianos en el perioperatorio de resección transuretral de la próstata sobre raquianestesia: estudio comparativo Cardiac arrhythmias and ST changes in the perioperative period of elderly patients submitted to transurethral prostatectomy under spinal anesthesia: comparative study

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Beatriz Lemos da Silva Mandim

2004-04-01

inguinal, nos períodos intra e pós-operatório.JUSTIFICATIVA Y OBJETIVOS: Ancianos representan 25% del total de los pacientes quirúrgicos. Muchos pacientes con enfermedad arterial coronariana (DAC presentan electrocardiograma (ECG pre-operatorio normal, y alta incidencia de infarto agudo del miocárdio (IAM silencioso en la 1ª semana de pos-operatorio. Las disritmias aumentan con la edad, siendo observadas extrasístoles supraventriculares (ESSV y ventriculares (ESV, fibrilación atrial y disturbios de la conducción intraventricular. El objetivo de este estudio fue evaluar la prevalencia de disritmias cardíacas y de alteraciones del segmento ST en el perioperatorio por intermedio del Holter en pacientes ancianos sometidos a cirugía de resección transuretral de la próstata (RTU y herniorrafia inguinal bajo raquianestesia. MÉTODO: Fueron evaluados 21 pacientes con edades entre 65 y 84 años, sometidos a RTU de la próstata y 16 pacientes con edades de 65 a 86 años, sometidos a herniorrafia inguinal, bajo raquianestesia. Evaluación por el Sistema Holter en el pre-operatorio (12 horas, intra-operatorio (3 horas y pos-operatorio (12 horas. RESULTADOS: La prevalencia de extrasístoles supraventriculares (ESSV entre los grupos RTU el control fue, en el pre-operatorio 85,7% vs. 93,7%, en el intra-operatorio 85,7% vs. 81,2% y en el pos operatorio de 76,2% vs. 100%. Las extrasístoles ventriculares (ESV tuvieron prevalencia de 76,2% vs. 81,2% en el pre, 80,9% vs. 68,7% en el per y 80,9% vs. 81,2% en el pos-operatorio. La prevalencia de alteraciones del segmento ST entre los grupos RTU y control fue, no pre-operatorio 19% vs. 18,7%, en el intra-operatorio 4,7% vs. 18,7% y en el pos-operatorio de 14,3% vs. 18,7%, sin significancia estadística. CONCLUSIONES: Los pacientes ancianos presentan alta prevalencia de ESSV y ESV. El número total de ESSV y ESV, y alteraciones del segmento ST, presentes en el período pre-operatorio, no fue alterado por la cirugía de resecci

Intraocular osseous metaplasia. A clinico-pathological study

OpenAIRE

Vemuganti Geeta; Honavar Santosh; Jalali Subhadra

2002-01-01

Purpose: To evaluate the clinico-pathologic features of intraocular osseous metaplasia. Methods: Pathology specimens of enucleated eyes submitted to the ophthalmic pathology service at a tertiary eye-care referral center between January 1995 and June 1999 were studied for intraocular osseous metaplasia. Specific histopathologic features noted in specimens with osseous metaplasia were the presence of retinal detachment, gliosis, retinal pigment epithelial hyperplasia, drusen, epiretinal membra...

Sistema de garantías: financiamiento a las PyMEs a través del mercado de capitales en Argentina. Instrumento: cheque de pago diferido

OpenAIRE

Gonzalez Barros, Ariel

2014-01-01

Este trabajo propone realizar un análisis exhaustivo sobre uno de los nuevos instrumentos disponibles para brindar financiamiento a las PyMEs en la Argentina a través del Mercado de Capitales. Específicamente se abordará el estudio del financiamiento a dicho segmento a través de la negociación del cheque de pago diferido, instrumento derivado de la obtención de avales por parte de las Sociedades de Garantía Reciproca. Se detallará la evolución del marco normativo vigente, tendiente a operativ...

Resultados da troca de lente intra-ocular de hidrogel opacificada

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Salera Cristina Moreira

2004-01-01

Full Text Available OBJETIVO: Avaliar os resultados da explantação e substituição das lentes intra-oculares (LIO de hidrogel opacificadas. MÉTODOS: Foram analisados retrospectivamente os prontuários de 12 pacientes (15 olhos submetidos à explantação e substituição das lentes intra-oculares de hidrogel opacificadas. RESULTADOS: A opacificação das lentes intra-oculares de hidrogel causou perdas de linhas de visão em 13 olhos (86,7%. A troca das lentes intra-oculares opacificadas promoveu o ganho de linhas de visão em 11 olhos (73,3%. As complicações peroperatórias ocorreram em três olhos (20% e foram as seguintes: perda de óleo de silicone, ruptura total de zônula com perda do saco capsular e ruptura parcial de zônula. Durante a explantação das lentes intra-oculares foi necessária a realização de incisões relaxantes na borda da capsulorrexe anterior em três olhos (20% e em dois olhos (13,3% os hápticos foram cortados sendo retirada somente a zona óptica das lentes intra-oculares. CONCLUSÃO: A cirurgia para explantação e substituição das lentes intra-oculares opacificadas mostrou-se eficaz naqueles pacientes com perdas de linhas de visão (p > 0,05.

Importance of intraocular pressure in glaucoma

Science.gov (United States)

Joos, Karen M.

1999-06-01

Glaucoma results in permanent vision loss and affects the peripheral vision initially. It is presented in 22.5 million people worldwide and is the 3rd cause of blindness. Present tonometers are not ideal for intraocular pressure measurements in all eyes. Of concern, PRK and LASIK may result in lower intraocular pressure readings. A challenges now exists for the development of a tonometer which can easily compensate for corneas with many parameters to avoid a future increase in normal-tension glaucoma or glaucoma which is advanced.

Competitividad del comercio exterior de la porcicultura mexicana en el Tratado de Libre Comercio de América del Norte

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Juvencio Hernández Martínez

2008-01-01

El concepto de competitividad utilizado en este trabajo, se define desde el punto de vista del desempeño en el comercio internacional, y se expresa como la capacidad de un país, de una industria, de un segmento o de una cadena productiva para conquistar, mantener o incrementar su participación en los mercados nacionales e internacionales. La competitividad comercial porcícola de los países que conformaron el tlcan en el periodo 1990-2004, se midió con los indicadores siguientes: la participac...

Solid intraocular xanthogranuloma in three Miniature Schnauzer dogs.

Science.gov (United States)

Zarfoss, Mitzi K; Dubielzig, Richard R

2007-01-01

Macrophages that contain abundant intracytoplasmic lipid are called 'foam cells'. In four canine globes submitted to the Comparative Ocular Pathology Laboratory of Wisconsin (COPLOW), foam cells formed a solid intraocular mass. The purpose of this study was to describe the histopathologic findings in these cases. The electronic COPLOW database (1993-2006) was searched for the diagnosis of 'foam cell tumor'. Clinical history, gross pathology and histopathology (5-micron sections, hematoxylin and eosin and Alcian blue periodic acid Schiff) were reviewed in all cases. Cases were included if the globe was grossly filled by a solid mass and if all intraocular structures were effaced by lipid-laden foam cell macrophages admixed with birefringent, Alcian blue-positive crystals oriented in stellate patterns. All three patients (four globes) satisfying the selection criteria were Miniature Schnauzers. In all cases the clinical history included diabetes mellitus, hyperlipidemia and chronic bilateral uveitis that was interpreted to be lens-induced. All globes were enucleated because of glaucoma. The term solid intraocular xanthogranuloma was used to describe these cases because the intraocular contents were effaced by a solid mass of foam cells and birefringent crystals. The cases in this report suggest that diabetic Miniature Schnauzers with hyperlipidemia are at risk for lipid and macrophage-rich uveitis, which may in some cases form a solid inflammatory intraocular mass, precipitate glaucoma, and lead to enucleation.

The Increase of Intra-Abdominal Pressure Can Affect Intraocular Pressure

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Ilhan Ece

2015-01-01

Full Text Available Objective. This study aims to explore the usage of intraocular pressure measurements as the early indicator of the increase in intra-abdominal pressure. Methods. In this prospective study, 40 patients undergoing elective surgery were included. Patients were divided into four groups of 10 patients. The control group (Group C was not subjected to laparoscopic intervention. Laparoscopic surgery was, respectively, performed with an intra-abdominal pressure of 9, 12, and 15 mmHg in Groups L (low, M (medium, and H (high pressure. Intraocular pressure was measured binocularly in each patient at three different times (before, during, and end of surgery using a contact tonometer. Results. Patients’ gender, age, body mass index (BMI, American Society of Anesthesiology (ASA class, and operative times were not different among the groups. No complications occurred with either the surgery or measurement of intraocular pressure. Intubation was associated with a severe rise in IOP (P<0.05. An increase in intraocular pressure was seen in groups M and H (P<0.05. Conclusion. Intraocular pressure was increased in the groups with an intra-abdominal pressure of 12 mmHg or more. Measuring the intraocular pressure might be a useful method to estimate the intra-abdominal pressure. This trial is registered with NCT02319213.

Organogênese do caquizeiro a partir de segmentos radiculares

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Carvalho Dayse Cristina de

2004-01-01

Full Text Available A produção de mudas de caquizeiro (Diospyros kaki pelo processo da enxertia sobre porta-enxertos provenientes de sementes, ocasiona problemas de desuniformidade vegetativa. O objetivo do trabalho foi contribuir para o desenvolvimento de um protocolo para a regeneração de brotações de caquizeiro do tipo café, a partir de raízes por organogênese indireta. Segmentos radiculares obtidos de embriões germinados in vitro foram isolados de sementes de frutos maduros em meio MSfraction one-halfNO3. As sementes receberam assepsia pela imersão em etanol 70% por um minuto, em solução de hipoclorito de sódio 2,5% por 20 minutos e quatro lavagens em água esterilizada. No primeiro experimento, os segmentos radiculares de 2cm foram isolados em meio de cultura MSfraction one-halfNO3 acrescido de 0,01mM de ácido indolacético e quatro tipos de citocininas nas concentrações 1 e 10mM: zeatina, 6-benzilaminopurina, 2-isopenteniladenina e thidiazuron. No segundo experimento, para o enraizamento das brotações, foram testados quatro períodos de permanência em meio com 10mM de ácido indolbutírico: 0, 5 10 e 15 dias. A maior regeneração de brotos (1,2 brotos por explante ocorreu na combinação 1mM de zeatina com 0,01mM de ácido indolacético. As brotações juvenis obtidas possuem potencial natural para o enraizamento, sendo necessário novos estudos para confirmar o efeito da aplicação de auxinas.

Competitividad de Cartagena como destino del turismo de congresos

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Pérez Merlos, Laura

2011-01-01

Este trabajo lleva a cabo un análisis de la posición competitiva de la ciudad de Cartagena como destino del turismo de reuniones y congresos. Para ello se estudian la situación y principales tendencias seguidas por el turismo de reuniones y congresos en la actualidad y qué factores son los determinantes básicos de la competitividad de un destino en este contexto. Finalmente se formulan recomendaciones orientadas a facilitar un mejor posicionamiento de Cartagena en este segmento de...

Hepatitis inmune temprana en el curso del síndrome de Sjögren en pediatría

OpenAIRE

Baar Z., Alejandro; Harris D., Paul; Talesnik G., Eduardo; Duarte G. de C., Ignacio

1999-01-01

La hepatitis inmune corresponde a una enfermedad necroinflamatoria del hígado, de causa desconocida, asociada a la presencia de autoanticuerpos circulantes. Puede presentarse aisladamente, o en asociación a otras enfermedades autoinmunes. Entre estas, destaca el síndrome de Sjögren, que compromete preferentemente a las glándulas salivales, aunque puede afectar a cualquier segmento del tubo digestivo, especialmente el hígado. Reportamos el caso de una niña de 12 años de edad, portadora de Sínd...

The effect of intraocular gas and fluid volumes on intraocular pressure.

Science.gov (United States)

Simone, J N; Whitacre, M M

1990-02-01

Large increases in the intraocular pressure (IOP) of postoperative gas-containing eyes may require the removal of gas or fluid to reduce the IOP to the normal range. Application of the ideal gas law to Friedenwald's equation provides a mathematical model of the relationship between IOP, intraocular gas and fluid volumes, and the coefficient of scleral rigidity. This mathematic model shows that removal of a given volume of gas or fluid produces an identical decrease in IOP and that the more gas an eye contains, the greater the volume reduction necessary to reduce the pressure. Application of the model shows that the effective coefficient of scleral rigidity is low (mean K, 0.0021) in eyes with elevated IOP that have undergone vitrectomy and retinal cryopexy and very low (mean K, 0.0013) in eyes with elevated IOP that have undergone placement of a scleral buckle and band. By using the appropriate mean coefficient of rigidity, the volume of material to be aspirated to produce a given decrease in IOP can be predicted with clinically useful accuracy.

Commercial air travel after intraocular gas injection.

Science.gov (United States)

Houston, Stephen; Graf, Jürgen; Sharkey, James

2012-08-01

Passengers with intraocular gas are at risk of profound visual loss when exposed to reduced absolute pressure within the cabin of a typical commercial airliner. Information provided on the websites of the world's 10 largest airlines offer a considerable range of opinion as to when it might be safe to fly after gas injection. Physicians responsible for clearing pseassengers as 'fit to fly' should be aware modern retinal surgical techniques increasingly employ long-acting gases as vitreous substitutes. The kinetics of long-acting intraocular gases must be considered when deciding how long after surgery it is safe to travel. It is standard practice to advise passengers not to fly in aircraft until the gas is fully resorbed. To achieve this, it may be necessary to delay travel for approximately 2 wk after intraocular injection of sulfur hexafluoride (SF6) and for 6 wk after injection of perfluoropropane (C3F8).

Intraocular Inflammation Associated with Ocular Toxoplasmosis : Relationships at Initial Examination

NARCIS (Netherlands)

Dodds, Emilio M.; Holland, Gary N.; Stanford, Miles R.; Yu, Fei; Siu, Willie O.; Shah, Kayur H.; Loon, Ninette Ten Dam-Van; Muccioli, Cristina; Hovakimyan, Anna; Barisani-Asenbauer, Talin

2008-01-01

PURPOSE: To describe characteristics of intraocular inflammation in eyes with active ocular toxoplasmosis and to identify relationships between signs of inflammation, complications (including elevated intraocular pressure [IOP]), other disease features, and host characteristics. DESIGN: Multicenter,

Actualización sobre el Síndrome de Dispersión Pigmentaria y el Glaucoma Pigmentario

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Yaima Mayo González

2015-03-01

Full Text Available El síndrome de dispersión pigmentaria se da por la liberación de pigmento del epitelio pigmentado del iris y depósito de gránulos de este en el iris y en las estructuras del segmento anterior, incluyendo el endotelio corneal y la malla trabecular, con posterior aumento de la presión intraocular y glaucoma. El glaucoma pigmentario (GP es un glaucoma de ángulo abierto, secundario a un síndrome de dispersión pigmentaria, que consiste en el acúmulo de pigmento a nivel de la malla trabecular, aumentando la resistencia a la salida del humor acuoso, ocasionando así un deterioro progresivo e irreversible de las estructuras oculares, llevando a la pérdida visual. El glaucoma pigmentario es el más frecuente de los glaucomas secundarios. Se presenta en pacientes jóvenes durante la tercera o cuarta década de la vida y el diagnóstico se realiza en una etapa de daño glaucomatoso avanzado, por lo que genera un gran impacto social. El propósito de este artículo es revisar la fisiopatología, clínica, tratamiento del GP y proporcionarles recomendaciones según lo estudiado

Reconstrucción de Piso Orbitario con esclera en Fracturas del Tercio Medio. Presentación de caso

OpenAIRE

Alexis A. Amador-Velázquez; Martha Rodríguez-Milord; Reynaldo Oro-Canelles

2011-01-01

Presentó un caso el cual fue víctima de una agresión con un objeto cortante que le produjo una fractura compleja del tercio medio facial provocándole una Fractura Le Fort III unilateral izquierda y Le Fort II unilateral derecha con herida perforante y extensa en globo ocular izquierdo que fue necesario realizar su eviseración, extrayendo de este un fragmento de esclera del segmento anterior de mas menos 1cm de largo para reparar una fractura mediana en piso orbital derecho logrando su fijaci...

Toric Intraocular Lens Outcomes in Patients With Glaucoma.

Science.gov (United States)

Brown, Reay H; Zhong, Le; Bozeman, Caroline W; Lynch, Mary G

2015-06-01

To report the outcomes of toric intraocular lens implantation in patients with glaucoma and corneal astigmatism. One hundred twenty-six eyes of 87 patients with glaucoma and corneal astigmatism that underwent cataract surgery with an AcrySof toric intraocular lens (Alcon Laboratories, Inc., Fort Worth, TX) implant were selected for this single-center, retrospective case series. Corrected distance visual acuity, intraocular pressure, and refractive astigmatism were measured in each eye preoperatively and postoperatively. Uncorrected distance visual acuity and toric alignment were measured postoperatively. The uncorrected distance visual acuity was 0.04 ± 0.08 logMAR (20/22 Snellen) for all eyes. Ninety-eight percent of all eyes achieved an uncorrected distance visual acuity of 20/40 or better, with 76% achieving 20/25 or better and 47% achieving 20/20. The corrected distance visual acuity for all eyes was 0.01 ± 0.03 logMAR (20/20.5 Snellen) postoperatively. The refractive cylinder improved from 1.47 ± 1.10 diopters preoperatively to 0.31 ± 0.37 diopters postoperatively. The residual refractive cylinder was 1.00 diopter or less in 97% of eyes, 0.75 diopters or less in 90% of eyes, and 0.50 diopters or less in 83% of eyes. Mean misalignment was 4.4° ± 5.1°. Intraocular pressure decreased by a mean of 2.3 ± 3.3 mm Hg following the surgery. Toric intraocular lenses can reliably reduce astigmatism and improve uncorrected vision in eyes with cataract and glaucoma. Copyright 2015, SLACK Incorporated.

Effect of plasma colloid osmotic pressure on intraocular pressure during haemodialysis

OpenAIRE

Tokuyama, T.; Ikeda, T.; Sato, K.

1998-01-01

BACKGROUND—In a previous case report, it was shown that an increase in plasma colloid osmotic pressure induced by the removal of fluid during haemodialysis was instrumental in decreasing intraocular pressure. The relation between changes in intraocular pressure, plasma osmolarity, plasma colloid osmotic pressure, and body weight before and after haemodialysis is evaluated.
METHODS—Intraocular pressure, plasma osmolarity, plasma colloid osmotic pressure, and body weight were evaluated before a...

Atuação de consórcios de exportação brasileiros no segmento de moda praia.

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Deborah Moraes Zouain

2008-04-01

Full Text Available O artigo aborda qualitativamente a atuação de consórcios de exportação no segmento moda praia no Brasil, na perspectiva do marketing. Utilizando o método da Grounded Theory, este estudo visa identificar categorias que compõem e influenciam o desempenho exportador de três consórcios de exportação do segmento de moda praia. Este artigo se torna relevante ao elencar as categorias encontradas por meio da pesquisa de campo e apresentar as relações entre elas. Essas categorias foram caracterizadas como grandes, intermediárias e iniciais, com o propósito de identificar os seguintes aspectos: a as características presentes apenas nos consórcios estudados, b o composto promocional por meio destas e c as características presentes no segmento de moda praia dos consórcios estudados. O artigo apresenta implicações teóricas e gerenciais ao apresentar duas grandes categorias que são relevantes na atuação de consórcios de exportação no mercado externo: conhecimento de marketing no mercado externo e características do consórcio.

Severe pigment dispersion after iris-claw phakic intraocular lens implantation.

Science.gov (United States)

Galvis, Virgilio; Carreño, Néstor I; Tello, Alejandro; Laiton, Andrea N

2017-12-01

A 23-year-old female patient presented 3 months after the implantation of an Artisan® phakic intraocular lens with a severe depigmentation of the iris and peripheral anterior synechiae. Explantation of the intraocular lens and goniosynechialysis were performed. Eleven months after the explantation appearance of the iris significantly improved. There was no loss of lines of corrected distance visual acuity. Severe pigment dispersion after the implantation of an Artisan® phakic intraocular lens may happen and may require explantation of the lens. Iris depigmentation may improve with time.

Severe pigment dispersion after iris-claw phakic intraocular lens implantation

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Virgilio Galvis

2017-01-01

Full Text Available A 23-year-old female patient presented 3 months after the implantation of an Artisan® phakic intraocular lens with a severe depigmentation of the iris and peripheral anterior synechiae. Explantation of the intraocular lens and goniosynechialysis were performed. Eleven months after the explantation appearance of the iris significantly improved. There was no loss of lines of corrected distance visual acuity. Severe pigment dispersion after the implantation of an Artisan® phakic intraocular lens may happen and may require explantation of the lens. Iris depigmentation may improve with time.

Empresas brasileiras do novo mercado e suas práticas de evidenciação voluntária de informações por segmento

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Ana Paula Capuano da Cruz

2014-05-01

Full Text Available A adoção das normas internacionais de contabilidade tem demandado alterações no padrão contábil de diversos países. Dentre tais mudanças, no Brasil, tem-se a incorporação de uma prática de divulgação de resultados que exige a evidenciação de informações por segmentos. O segment reporting, como também é denominado, é uma exigência introduzida pela International Financial Reporting Standard (IFRS 8 que implica um ponto de tangência muito forte entre a contabilidade gerencial e a contabilidade com foco no usuário externo. Com base nessas alterações, a partir da análise das Notas Explicativas das 106 companhias listadas no Novo Mercado da Bolsa de Valores, Mercadorias e Futuros de São Paulo (BM&FBovespa, o estudo objetivou verificar como as companhias abertas brasileiras estruturaram o formato de evidenciação de informações por segmento. Em termos metodológicos, trata-se de uma pesquisa documental, de caráter descritivo, que conjuntou o emprego da técnica de análise de conteúdo e de testes não paramétricos de Mann-Whitney e Kruskal-Wallis para verificar o grau de intensidade da divulgação de informações por segmento, conforme metodologia utilizada por Guthrie et al. (1999. Os achados sinalizaram que a divulgação voluntária de informações por segmento ainda é incipiente no cenário brasileiro. Identificou-se que as companhias auditadas por uma das Big Four apresentaram menor grau de intensidade na divulgação dos impactos futuros da aplicação das orientações normativas sobre informações por segmento. Considerando o universo das 106 companhias analisadas, destaca-se que as informações segmentadas por área geográfica e ainda, por tipo de produtos ou serviços, mostraram-se mais recorrentes; informações por clientes foram escassas. Nenhuma empresa evidenciou o fluxo de caixa por segmento, e 39 companhias não mencionaram que o CPC 22 trará impacto às futuras Demonstrações Contábeis. Assim

Fundus autofluorescence patterns in primary intraocular lymphoma.

Science.gov (United States)

Casady, Megan; Faia, Lisa; Nazemzadeh, Maryam; Nussenblatt, Robert; Chan, Chi-Chao; Sen, H Nida

2014-02-01

To evaluate fundus autofluorescence (FAF) patterns in patients with primary intraocular (vitreoretinal) lymphoma. Records of all patients with primary intraocular lymphoma who underwent FAF imaging at the National Eye Institute were reviewed. Fundus autofluorescence patterns were evaluated with respect to clinical disease status and the findings on fluorescein angiography and spectral-domain optical coherence tomography. There were 18 eyes (10 patients) with primary intraocular lymphoma that underwent FAF imaging. Abnormal autofluorescence in the form of granular hyperautofluorescence and hypoautofluorescence was seen in 11 eyes (61%), and blockage by mass lesion was seen in 2 eyes (11%). All eyes with granular pattern on FAF had active primary intraocular lymphoma at the time of imaging, but there were 5 eyes with unremarkable FAF, which were found to have active lymphoma. The most common pattern on fluorescein angiography was hypofluorescent round spots with a "leopard spot" appearance (43%). These hypofluorescent spots on fluorescein angiography correlated with hyperautofluorescent spots on FAF in 5 eyes (36%) (inversion of FAF). Nodular hyperreflective spots at the level of retinal pigment epithelium on optical coherence tomography were noted in 43% of eyes. The hyperautofluorescent spots on FAF correlated with nodular hyperreflective spots on optical coherence tomography in 6 eyes (43%). Granularity on FAF was associated with active lymphoma in majority of the cases. An inversion of FAF (hyperautofluorescent spots on FAF corresponding to hypofluorescent spots on fluorescein angiography) was observed in less than half of the eyes.

Aderência in vitro do Staphylococcus epidermidis e da Pseudomonas alcaligenes em lentes intra-oculares In vitro adherence of Staphylococcus epidermidis and Pseudomonas alcaligenes to intraocular lenses

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Patrícia Ioschpe Gus

2006-06-01

Full Text Available OBJETIVO: Quantificar e comparar a aderência in vitro das bactérias Staphylococcus epidermidis e Pseudomonas alcaligenes em diferentes tipos de lentes intra-oculares (LIOs. MÉTODOS: Quatorze lentes intra-oculares foram usadas no experimento. Quatro de polimetilmetacrilato (PMMA, quatro de silicone, quatro de hidrogel e duas de acrílico. Oito lentes intra-oculares foram colocadas em oito tubos de ensaio contendo 4 ml de suspensão de Pseudomonas alcaligenes, e seis lentes intra-oculares foram colocadas em seis tubos de ensaio contendo 4 ml de suspensão de Staphylococcus epidermidis. A concentração do caldo utilizada para o teste de aderência foi de 10(8 unidades formadoras de colônias por mililitro (CFU/mL que corresponde a 0,5 na escala de McFarland. As lentes foram incubadas a 37° por duas horas. Após, foram removidas dos caldos e enxaguadas em água destilada estéril por duas vezes. As lentes foram cultivadas em placas de ágar-sangue a 35-37° e evaliadas a cada 24h por um período de 72h. Nas amostras que tiveram crescimento bacteriano, foram contadas as colônias utilizando os métodos convencionais de laboratório. Todos os ensaios foram executados em duplicata. RESULTADOS: A aderência do Staphylococcus epidermidis nas lentes de PMMA foi menor se comparada com as de silicone e de hidrogel. A aderência daPseudomonas alcaligenes nas lentes de hidrogel foi menor se comparada com as de silicone, PMMA e acrílico. CONCLUSÃO: Os resultados sugerem que a aderência do Staphylococcus epidermidis e da Pseudomonas alcaligenes nas lentes intra-oculares é influenciada pelo tipo de material da lente e pela espécie do microorganismo. A aderência bacteriana pode ter papel importante na patogenicidade da endoftalmite pós-cirurgia de catarata.PURPOSE: To quantify and compare the in vitro adherence of Staphylococcus epidermidis and Pseudomonas alcaligenes to different intraocular lenses (IOLs. METHODS: Fourteen intraocular lenses were

WHAT HAPPENS TO INTRAOCULAR PRESSURE AFTER PERIBULBAR ANAESTHESIA?

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Krishnamoorthy Segharipuram Ranganathan

2017-08-01

Full Text Available BACKGROUND Most of intraocular surgeries are done under local anaesthesia. The peribulbar anaesthesia provides adequate anaesthesia and akinesia. There is no reported intraoperative and/or postoperative amaurosis. The peribulbar anaesthesia provides adequate anaesthesia and akinesia. The disadvantages of it are the larger quantity of the aesthetic agent. Increasing the bulk load on the globe and a reported rise of intraocular pressure. MATERIALS AND METHODS A study of fifty cases was conducted in patients who received peribulbar anaesthesia undergoing cataract extraction with intraocular lens implantation and their intraocular pressures were noted and studied after giving the peribulbar anaesthesia all given by the same surgeon. RESULTS This study did show that the peribulbar anaesthesia increases the intraocular pressure in all the cases. The external ocular compression indeed helps to dissipate the anaesthetic load thereby reducing the enormous rise in IOP, which is only expected if you recollect the fact that the eyeball occupies one sixth of the total volume of the orbit that is 5 mL and 30 mL. The volume of peribulbar anaesthesia (6 mL does add its effects to increase the IOP. Hence, a properly planned post peribulbar compression helps to minimise the transient rise in IOP. CONCLUSION Summarising the study, it is better to give peribulbar injection initially followed by external ocular compression after a delay of at least 2 to 5 minutes. It is also advised that an initial compression maybe given in slightly risk cases, so that the peribulbarinduced rise may not be alarming. The anaesthetic solution maybe fragmented and the second injection maybe delayed by 5 minutes or omitted if good akinesia and anaesthesia are achieved already.

Visual outcome with the Oculentis Mplus intraocular lens

OpenAIRE

Si-Yuan Liu; Xu Yang

2017-01-01

AIM: To evaluate the visual outcome of Oculentis Mplus intraocular lens(IOL).METHODS: Totally 20 eyes in 20 patients received phacoemulsification and Oculentis Mplus intraocular lens implantation were as test group, and 20 eyes(Aspira-aA IOL)were as control group. The following postoperative examinations were performed after operation for 3mo: uncorrected visual acuity of distance and near, refractive results, UBM examination, the rate of wearing spectacles and the complications. RESULTS: At ...

Towards customized intraocular lenses

NARCIS (Netherlands)

de Jong, Tim

2017-01-01

In the eye there are two refractive components that make light focus on the retina and let you see: the cornea and the lens. When a eye develops cataract the lens becomes caractarous and is removed and replaced with a synthetic intraocular lens during a cataract surgery procedure. Although there was

Principales métodos para el cálculo de la lente intraocular después de la cirugía refractiva corneal

Directory of Open Access Journals (Sweden)

Taimí Cárdenas Díaz

Full Text Available Con el surgimiento y el desarrollo de la cirugía refractiva corneal se han podido corregir quirúrgicamente a millones de pacientes con defectos refractivos. Con el cursar de los años comienza a opacarse fisiológicamente el cristalino, y disminuye la agudeza visual en estos pacientes a quienes se les modificó la curvatura corneal. Ante la necesidad de remover el cristalino y de calcular una lente intraocular de potencia adecuada para conseguir la emetropía, surge un nuevo reto a la Oftalmología. El cálculo de la lente intraocular en pacientes con cirugía refractiva corneal es mucho más complejo, pues además de tener longitudes axiales extremas, se añaden factores por la intervención previa que alteran la predictibilidad del resultado visual, con la aplicación de las fórmulas de cálculo de lente intraocular existentes. Se han descrito varios métodos que permiten determinar correctamente la potencia de la lente a implantar, dependiendo de los datos de los que se dispongan; de ahí la motivación para realizar una revisión de diferentes publicaciones con el propósito de describir los principales métodos empleados para realizar el cálculo de la lente intraocular en estos pacientes. Se utilizó la plataforma Infomed, específicamente la Biblioteca Virtual de Salud, con todos sus buscadores.

Effect of aspherical and yellow tinted intraocular lens on blue-on-yellow perimetry

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Rodrigo França de Espíndola

2012-10-01

Full Text Available PURPOSE: To investigate the possible effect of aspherical or yellow tinted intraocular lens (IOL on contrast sensitivity and blue-on-yellow perimetry. METHODS: This prospective randomized bilateral double-masked clinical study included 52 patients with visually significant bilateral cataracts divided in two groups; 25 patients (50 eyes received aspherical intraocular lens in one eye and spherical intraocular lens in the fellow eye; and 27 patients (54 eyes received ultraviolet and blue light filter (yellow tinted IOL implantation in one eye and acrylic ultraviolet filter IOL in the fellow eye. The primary outcome measures were contrast sensitivity and blue-on-yellow perimetry values (mean deviation [MD] and pattern standard deviation [PSD] investigated two years after surgery. The results were compared intra-individually. RESULTS: There was a statistically significant between-group (aspherical and spherical intraocular lens difference in contrast sensitivity under photopic conditions at 12 cycles per degree and under mesopic conditions at all spatial frequencies. There were no between-group significant differences (yellow tinted and clear intraocular lens under photopic or mesopic conditions. There was no statistically significant difference between all intraocular lens in MD or PSD. CONCLUSION: Contrast sensitivity was better under mesopic conditions with aspherical intraocular lens. Blue-on-yellow perimetry did not appear to be affected by aspherical or yellow tinted intraocular lens. Further studies with a larger sample should be carried out to confirm or not that hypotheses.

Clinical study on the incidence of vancomycin intraocular injection in treatment with suppurative endophthalmitis

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Yi-Qin Duan

2015-05-01

Full Text Available AIM:To estimate the clinical significance of the microculture of humor and vitreous and vancomycin intraocular injection in treatment of suppurative endophthalmitis associated with intraocular foreign bodies.METHODS: Totally 65 patients with penetrating eye trauma and retained intraocular foreign bodies in emergency operation and intraocular injection from January 2012 to September 2014 were regarded as the study group, another 62 patients with penetrating eye trauma and retained intraocular foreign bodies in emergency operation without intraocular injection before August 2011 were regarded as the control group. Aqueous humor and vitreous humor were taken from each patient of the study group and the control group for bacteria and fungus cultivation. The study group was treated with 1mg vancomycin intraocular injection after operation, while the control group was not. RESULTS: The incidence of endophthalmitis in the control group was 16%(10 cases, while in the study group was 3%(2 cases, with significant difference between two groups(x2=6.32, PP>0.05. The positive rate of vitreous humor germiculture in study group was 14%(9 cases, and the incidence of endophthalmitis was 3%. The positive rate of vitreous humor germiculture in control group was 11%(7 casesand the incidence of endophthalmitis was 16%, with significant differences between two groups(PCONCLUSION: Intraocular foreign bodies treated with emergency operation and vancomycin intraocular injections can decrease the incidence of suppurative endophthalmitis and have a good vision prognosis for the second stage of operation.

Survey of Intraocular Antibiotics Prophylaxis Practice after Open Globe Injury in China.

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Bingsheng Lou

Full Text Available To elucidate the Chinese practice of intraocular antibiotics administration for prophylaxis after open globe injury.A cross-sectional questionnaire survey was performed online by scanning a Quickmark (QR code with smartphones at the 20th Chinese National Conference of Ocular Trauma in November 2014.A total of 153 (30.6% of all participators at the conference responded. Of the respondents, 20.9% were routinely administered with prophylactic intraocular injection of antibiotics at the conclusion of the primary eye repair, and 56.9% were used only in cases with high risk of endophthalmitis development. The intraocular route of delivery was mainly included with intracameral injection (47.9% and intravitreal injection (42.0%. Cephalosporins (53.8% and vancomycin (42.0% were the main choices of antibiotic agents, followed by fluoroquinolones (24.3%, and aminoglycosides (13.4%. Only 21.9% preferred a combination of two or more two drugs routinely. In addition, significantly more respondents from the referral eye hospital (92.7% replied using intraocular antibiotics injection for prophylaxis compared to those respondents from the primary hospital (69.4% (p = 0.001, Fisher's exact test.Intraocular antibiotics injection for post-traumatic endophthalmitis prophylaxis is widely used in China. However, the choice of antibiotic agents and the intraocular route of delivery vary. A well-designed clinical trial is needed to establish a standardized protocol of intraocular antibiotics administration for post-traumatic endophthalmitis prophylaxis.

Factores que influyen en el uso del contenido generado por el usuario en internet: Un estudio preliminar con viajeros brasileños

OpenAIRE

Mendes-Filho, Luiz; Santos Dantas de Carvalho, Manuela

2014-01-01

El Contenido Generado por el Usuario (CGU) ha resultado muy importante como factor decisorio en la compra de productos turísticos, destacándose el segmento hotelero. Para analizar el CGU como factor influyente al elegir un hotel se utilizó la Teoría del Comportamiento Planeado (TCP), basada en tres factores (actitud, normas subjetivas y control del comportamiento percibido). Se aplicó en un hotel de Natal un instrumento de investigación con preguntas cerradas de forma aleatoria. La metodologí...

Mean intraocular pressure in hypertensive adults

International Nuclear Information System (INIS)

Irum, S.; Malik, A.M.; Saeed, M.

2015-01-01

To determine the mean Intraocular Pressure (IOP) in already diagnosed adult hypertensive patients with different grades of hypertension. Study Design: Cross-sectional descriptive study. Place and Duration of Study: Combined Military Hospital, Lahore, from March 2012 to Aug 2012. Patients and Methods: A total of 178 already diagnosed hypertensive patients were selected. A detailed history of ocular or systemic diseases was taken. Intraocular pressure was measured with help of Goldmann applanation tonometer. Three consecutive readings of IOP of each eye were taken at 30 minutes interval and mean calculated. Blood pressure was recorded in seated position from right upper arm, by mercury sphygmomanometer. Blood pressure measurements were determined by taking the mean value of three systolic and diastolic readings. Results: The results of intraocular pressure (IOP) between various grades of hypertension were determined. There was an increase in mean IOP with rise in blood pressure. The subjects with grade I hypertension showed a mean IOP of 13.95 ± 3.74 mmHg, while grade II and grade III hypertensive subjects had mean IOPs as 18.10 ± 3.32 and 20.21 ± 2.52 mmHg respectively. Conclusion: A higher value of mean IOP was found with increase in systolic and diastolic blood pressures. (author)

Pigment dispersion syndrome associated with intraocular lens implantation: a new surgical technique.

Science.gov (United States)

Canut Jordana, M Isabel; Pérez Formigó, Daniel; Abreu González, Rodrigo; Nadal Reus, Jeroni

2010-11-11

We report the case of a myopic patient who, after intraocular lens transplant in the posterior chamber, suffered elevated intraocular pressure due to pigment dispersion, with recurrent episodes of blurred vision. The patient was treated with a new surgical technique that can avoid potential iridolenticular contact. Complete ophthalmologic examination and optical coherence tomography (OCT) of the anterior segment were performed. Contact between the pigmentary epithelium and the iris with an intraocular lens was revealed by utrasound biomicroscopy and OCT. In this case, Nd:YAG laser iridotomy and laser iridoplasty were not effective for iridolenticular separation and control of the pigment dispersion. We propose a new technique: stitches on the surface of the iris to obtain good iridolenticular separation and good intraocular pressure control. Stitches on the iris surface should be considered as optional therapy in pigmentary glaucoma secondary to intraocular lens implantation. This surgical technique can avoid potential iridolenticular contacts more definitively.

El desarrollo de la postura corporal en niños de sexto año de vida del municipio Pinar del Río

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Orestes González Díaz

2009-06-01

Full Text Available La postura corporal es una categoría conceptual esencial en la cultura física y un sistema funcional complejo y multidimensional, determinado por factores tales como: rasgos individuales de la personalidad, actividad física que realiza el individuo, aspectos fisiológicos, biomecánicos, médicos, deportivos, terapéuticos, entre otros. Es una cualidad susceptible de ser educada y reeducada, por lo que tiene un particular interés pedagógico. Es un indicador de salud del individuo que se analiza y también una problemática, que en la población en general y en específico la escolar y preescolar requiere de  una mayor atención multidisciplinaria. Varios de los autores consultados no definen claramente el concepto de postura correcta. Otros como Lincht (1968, Karpman (1980, D. Gray Carolyn E. (1983 lo hacen pero desde sus diversos puntos de vista. Los autores Tovar Navas, M.L. y Escalona Labaceno R. (2002 definen la postura correcta como: "…La alineación simétrica y proporcional de los segmentos corporales alrededor del eje de la gravedad…". S. Popov  (1988 la define como “la posición habitual del cuerpo del hombre parado libremente sin tensión muscular adicional alguna”.  Hernández Corvo (s. a.  la define como “la expresión más bella de la estructura armónica del movimiento”. En trabajos relacionados con la temática Alonso, R (1988 la define como “ la relación de los diferentes segmentos corporales en una posición dada”, Rodríguez Leyva, D. y otros la definen como “una posición mantenida sistemáticamente ante determinadas condiciones y se manifiesta anatómicamente por la forma que adopta el cuerpo” (2008.   Para el autor del trabajo la postura corporal es aquella que asume el niño ya sea en una posición estática, en movimiento, en la  realización de cualquier acción, en la permanencia en un lugar determinado, en el sueño, a la hora de sentarse, de alimentarse, de jugar, etc.

El desarrollo de la postura corporal en niños de sexto año de vida del municipio Pinar del Río

Directory of Open Access Journals (Sweden)

Orestes González Díaz

2009-09-01

Full Text Available La postura corporal una categoría conceptual esencial en la cultura física y un sistema funcional complejo y multidimensional, determinado por factores tales como: rasgos individuales de la personalidad, actividad física que realiza el individuo, aspectos fisiológicos, biomecánicos, médicos, deportivos, terapéuticos, entre otros. Es una cualidad susceptible de ser educada y reeducada, por lo que tiene un particular interés pedagógico. Es un indicador de salud del individuo que se analiza y también una problemática, que en la población en general y en específico la escolar y preescolar requiere de una mayor atención multidisciplinaria. Varios de los autores consultados no definen claramente el concepto de postura correcta. Otros como Lincht (1968, Karpman (1980, D. Gray Carolyn E. (1983 lo hacen pero desde sus diversos puntos de vista. Los autores Tovar Navas, M.L. y Escalona Labaceno R. (2002 definen la postura correcta como: "…La alineación simétrica y proporcional de los segmentos corporales alrededor del eje de la gravedad…". S. Popov  (1988 la define como “la posición habitual del cuerpo del hombre parado libremente sin tensión muscular adicional alguna”.  Hernández Corvo (s. a.  la define como “la expresión más bella de la estructura armónica del movimiento”. En trabajos relacionados con la temática Alonso, R (1988 la define como “ la relación de los diferentes segmentos corporales en una posición dada”, Rodríguez Leyva, D. y otros la definen como “una posición mantenida sistemáticamente ante determinadas condiciones y se manifiesta anatómicamente por la forma que adopta el cuerpo” (2008.   Para el autor del trabajo la postura corporal es aquella que asume el niño ya sea en una posición estática, en movimiento, en la  realización de cualquier acción, en la permanencia en un lugar determinado, en el sueño, a la hora de sentarse, de alimentarse, de jugar,  etc.

KINEMATICS ANALYSIS OF A PARALLEL ROBOT WITH A PASSIVE SEGMENT ANÁLISIS DE LA CINEMÁTICA DE UN ROBOT PARALELO CON UN SEGMENTO PASIVO

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Abdelhakim Cherfia

2007-08-01

Full Text Available This paper presents a geometrical model of a constrained robot of three degrees of freedom (d.o.f added to a PPP passive central segment. This structure provides a pure translation motion. We will also determine the relations between generalized and articular velocities by using the inverse Jacobian matrix. Further, we determine the reciprocal relations between cartesian and angular velocities of the end-effector via articular velocities by simple derivation of the direct geometrical model expressions. A determination of the workspace based on the geometrical model analysis is derived followed by a numerical calculation of all the atteignables points enabling a graphical visualisation of such a workspace. Moreover, the analysis of the Jacobian matrix has permitted to ensure that there are no singularities of type 1 and 2 in such a structure. A prototype of a parallel robot has been built up in our laboratory in order to validate the proposed models.Este trabajo presenta el modelo geométrico de un robot paralelo con tres grados de libertad (d.o.f agregados a un segmento central pasivo del PPP. Esta estructura proporciona un movimiento de translación pura. También determinaremos las relaciones entre las velocidades generalizadas y articulares usando la matriz Jacobiana inversa. Además, determinamos las relaciones recíprocas entre las velocidades cartesianas y angulares del end-effector vía velocidades articulares por la derivación simple de las expresiones del modelo geométrico directo. Una determinación del espacio de trabajo basado en el análisis del modelo geométrico es derivado seguido por un cálculo numérico de todos los puntos que deben alcanzarse permitiendo una visualización gráfica de tal espacio de trabajo. Por otra parte, el análisis de los coeficientes de la matriz Jacobiana permite asegurar que no haya singularidades del tipo 1 y 2 en tal estructura. Se ha realizado un prototipo de robot paralelo en nuestro laboratorio

Intraocular pressure variations during zygomatic fracture reduction and fixation: a clinical study.

LENUS (Irish Health Repository)

Murray, Dylan J

2012-02-03

BACKGROUND: The reduction of midface fractures has been associated with the rare but devastating complication of blindness. An increase in intraocular pressure is important in the mechanism of blindness in this setting. In this study, the authors assessed the intraocular pressure in patients who underwent zygomatic fracture reduction (with or without fixation). METHODS: Using applanation tonometry, 29 patients underwent intraocular pressure measurements before, during, and after fracture fixation. The contralateral pressures were measured and used as the control. RESULTS: There were 29 patients with a mean age of 35 years, and the mean time to surgery was 5 days. Preoperatively, all patients had normal intraocular pressures and normal visual acuity. All patients underwent a Gillies lift and 18 patients required open reduction and fixation of the frontozygomatic suture (n = 4) or the infraorbital margin (n = 2), and the remainder (n = 12) required fixation of both points. There was no statistically significant increase in the intraocular pressures following the reduction of uncomplicated zygomatic fractures. Statistically significant pressure reductions were noted immediately after reduction and fixation. CONCLUSIONS: The surgical reduction of uncomplicated zygomatic fractures has no adverse effect on the intraocular pressure. It is the authors\\' opinion that adjunctive measures to reduce the pressures are unnecessary.

Topical tissue plasminogen activator appears ineffective for the clearance of intraocular fibrin.

Science.gov (United States)

Zwaan, J; Latimer, W B

1998-06-01

To determine the efficacy of topical tissue plasminogen activator (tPA) for the resolution of postoperative or inflammatory intraocular fibrinous exudates. Each treatment consisted of drops of 1 mg/ml tPA given 9 times 5 minutes apart. Records were reviewed and the results at 24 and 48 hours were recorded. Sixty-two patients had a total of 94 treatments. Fibrin exudates following intraocular surgery in 34 patients were treated 44 times. In 6 patients there was a positive result. Fibrin associated with intraocular infection was treated in 9 patients. None showed clear improvement. Nineteen patients had a total of 34 treatments for poorly controlled intraocular pressure (IOP) after glaucoma surgery. Five patients showed adequate control of the IOP, 12 did not change, and 2 had a questionable improvement. Eleven patients had adequate IOP control after additional treatment. Seven required suture lysis, 2 ab interno bleb revision, and 2 YAG capsulotomy or iridotomy to reduce the IOP to an acceptable level. Within the limits of this retrospective study and taking into account that fibrin may resolve spontaneously, it appears that topical tPA drops are not effective for the liquefaction of intraocular fibrin after surgery or in association with intraocular inflammation. They did not improve IOP control after glaucoma surgery.

Pigment dispersion syndrome associated with intraocular lens implantation: a new surgical technique

Directory of Open Access Journals (Sweden)

M Isabel Canut Jordana

2010-11-01

Full Text Available M Isabel Canut Jordana1, Daniel Pérez Formigó1, Rodrigo Abreu González2, Jeroni Nadal Reus11Barraquer Ophthalmology Centre, Barcelona, Spain; 2University Hospital of La Candelaria, Tenerife, SpainAims: We report the case of a myopic patient who, after intraocular lens transplant in the posterior chamber, suffered elevated intraocular pressure due to pigment dispersion, with recurrent episodes of blurred vision. The patient was treated with a new surgical technique that can avoid potential iridolenticular contact.Methods: Complete ophthalmologic examination and optical coherence tomography (OCT of the anterior segment were performed.Results: Contact between the pigmentary epithelium and the iris with an intraocular lens was revealed by utrasound biomicroscopy and OCT. In this case, Nd:YAG laser iridotomy and laser iridoplasty were not effective for iridolenticular separation and control of the pigment dispersion. We propose a new technique: stitches on the surface of the iris to obtain good iridolenticular separation and good intraocular pressure control.Conclusion: Stitches on the iris surface should be considered as optional therapy in pigmentary glaucoma secondary to intraocular lens implantation. This surgical technique can avoid potential iridolenticular contacts more definitively.Keywords: pigmentary glaucoma, intraocular lens, optical coherence tomography, laser

Advanced pigment dispersion glaucoma secondary to phakic intraocular collamer lens implant

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Clara Ye

2018-06-01

Full Text Available Purpose: We report a case of pigment dispersion glaucoma secondary to uncomplicated phakic intraocular collamer lens (ICL (Visian ICL™, Staar Inc., Monrovia, CA implant that resulted in advanced visual field loss. Observations: A 50-year-old man presented for routine follow-up status post bilateral phakic intraocular collamer lens (ICL placement 8 years earlier. He was incidentally found to have a decline in visual acuity from an anterior subcapsular cataract and elevated intraocular pressure (IOP in the left eye. There were signs of pigment dispersion and no evidence of angle closure. Diffuse optic nerve thinning was consistent with advanced glaucomatous visual field defects. Pigment dispersion was also present in the patient's right eye, but without elevated IOP or visual field defects. The patient was treated with topical glaucoma medications and the phakic ICL in the left eye was removed concurrently with cataract surgery to prevent further visual field loss. Conclusions and importance: Pigment dispersion glaucoma is a serious adverse outcome after phakic ICL implantation and regular post-operative monitoring may prevent advanced visual field loss. Keywords: Phakic intraocular lens, Intraocular collamer lens, Pigment dispersion, Glaucoma

Assessment of intraocular foreign bodies by helical-CT multiplanar imaging

International Nuclear Information System (INIS)

Papadopoulos, A.; Fotinos, A.; Maniatis, V.; Kavadias, S.; Michaelides, A.; Avouri, M.; Kalamara, C.; Stringaris, K.

2001-01-01

The aim of this study was to examine the effectiveness of helical CT in the assessment of intraocular foreign bodies, evaluating two protocols with different collimation. We performed helical-CT studies in 30 patients. Fifteen patients were examined with 1.5-mm collimation and the other 15 patients with 3.0-mm collimation. All other imaging parameters were identical in both protocols. Multiplanar images were reconstructed. The examinations were reviewed for presence, localization and size of intraocular foreign bodies. We compare our results with the surgical data. We estimate the required examination time. In the first group (collimation 1.5 mm) an intraorbital foreign body was detected in 8 of 15 patients. In 3 of 8 patients an intraocular foreign body (all were metallic) was detected. In the second group (collimation 3.0 mm) an intraorbital foreign body was detected in 9 of 15 patients. In 8 of 9 patients an intraocular foreign body (all were metallic) was detected. Our results were confirmed by surgery in all cases. Examination time was 36 s in the first group and 18 s in the second group. Computed tomography should be considered the imaging modality of choice in the assessment of metallic intraocular foreign bodies and 3.0-mm collimation is optional, because of reduced examination time and radiation exposure. (orig.)

A novel clinical sign in intraocular tuberculosis: Active chorioretinitis within chorioretinal atrophy

OpenAIRE

Avinash Pathengay; Bhavik Panchal; Himadri Choudhury; Soumyava Basu; Nidhi Relhan; Harry W. Flynn, Jr.

2017-01-01

Purpose: To report a novel clinical sign in patients with intraocular tuberculosis. The current study is an observational consecutive case series of patients diagnosed with intraocular tuberculosis managed at a tertiary eye care centre from June 1, 2012 to December 31, 2015. Observations: The diagnosis of intraocular tuberculosis was made in 6 patients based on ocular features suggestive of tuberculosis along with a positive tuberculin skin testing and chest X-ray consistent with tuberculo...

El perfil del consumidor de hostel en Brasil y sus motivaciones

OpenAIRE

Mané, Alexandra; Ferreira, Lissa

2017-01-01

El creciente número de hostels en Brasil ha atraído cada vez más brasileños que buscan este tipo de establecimiento para hospedarse. No obstante, vale destacar que deben realizarse más estudios que aborden la importancia de los hostels y sus consumidores en el mercado de turismo. Podrán contribuir al conocimiento teórico y práctico posibilitando un mejor entendimiento sobre este segmento. El objetivo de este artículo es identificar y describir el perfil del consumidor de hostel, sus motivacio...

Comparison of a new refractive multifocal intraocular lens with an inferior segmental near add and a diffractive multifocal intraocular lens.

Science.gov (United States)

Alio, Jorge L; Plaza-Puche, Ana B; Javaloy, Jaime; Ayala, María José; Moreno, Luis J; Piñero, David P

2012-03-01

To compare the visual acuity outcomes and ocular optical performance of eyes implanted with a multifocal refractive intraocular lens (IOL) with an inferior segmental near add or a diffractive multifocal IOL. Prospective, comparative, nonrandomized, consecutive case series. Eighty-three consecutive eyes of 45 patients (age range, 36-82 years) with cataract were divided into 2 groups: group A, 45 eyes implanted with Lentis Mplus LS-312 (Oculentis GmbH, Berlin, Germany); group B, 38 eyes implanted with diffractive IOL Acri.Lisa 366D (Zeiss, Oberkochen, Germany). All patients underwent phacoemulsification followed by IOL implantation in the capsular bag. Distance corrected, intermediate, and near with the distance correction visual acuity outcomes and contrast sensitivity, intraocular aberrations, and defocus curve were evaluated postoperatively during a 3-month follow-up. Uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), uncorrected near visual acuity (UNVA), corrected distance near and intermediate visual acuity (CDNVA), contrast sensitivity, intraocular aberrations, and defocus curve. A significant improvement in UDVA, CDVA, and UNVA was observed in both groups after surgery (P ≤ 0.04). Significantly better values of UNVA (P<0.01) and CDNVA (P<0.04) were found in group B. In the defocus curve, significantly better visual acuities were present in eyes in group A for intermediate vision levels of defocus (P ≤ 0.04). Significantly higher amounts of postoperative intraocular primary coma and spherical aberrations were found in group A (P<0.01). In addition, significantly better values were observed in photopic contrast sensitivity for high spatial frequencies in group A (P ≤ 0.04). The Lentis Mplus LS-312 and Acri.Lisa 366D IOLs are able to successfully restore visual function after cataract surgery. The Lentis Mplus LS-312 provided better intermediate vision and contrast sensitivity outcomes than the Acri.Lisa 366D. However, the

Níveis de PCR são maiores em pacientes com síndrome coronariana aguda e supradesnivelamento do segmento ST do que em pacientes sem supradesnivelamento do segmento ST

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Syed Shahid Habib

2011-01-01

Full Text Available FUNDAMENTO: Há grande interesse no uso de proteína C-reativa de alta sensibilidade (PCR-as para avaliação de risco. Altos níveis de PCR-as no início da síndrome coronária aguda (SCA, antes da necrose tecidual, pode ser um marcador substituto para comorbidades cardiovasculares. OBJETIVO: Dessa forma, nosso objetivo foi estudar diferentes medidas de seguimento de níveis de PCR-as em pacientes com SCA e comparar as diferenças entre infarto do miocárdio sem elevação do segmento ST (NSTEMI com pacientes apresentando elevação do segmento ST (STEMI. MÉTODOS: Este é um estudo observacional. Dos 89 pacientes recrutados, 60 apresentavam infarto agudo do miocárdio (IAM. Três níveis seriados de PCR-us, a nível basal na hospitalização antes de 12 horas após inicio dos sintomas, níveis de pico 36-48 horas após hospitalização e níveis de acompanhamento após 4 a 6 semanas foram analisados e comparados entre pacientes com (IAMCSST e sem supradesnivelamento do segmento ST (IAMSSST. RESULTADOS: Pacientes com IAMCSST tinham IMC significantemente mais alta quando comparados com pacientes IAMSSST. Os níveis de creatino quinase fração MB (CK-MB e aspartato aminotransferase (AST eram significantemente mais altos em pacientes com IAMCSST quando comparados com pacientes com IAMSSST (p<0,05. Os níveis de PCR a nível basal e no acompanhamento não diferiram de forma significante entre os dois grupos (p=0,2152 e p=0,4686 respectivamente. Houve uma diferença significante nos níveis de pico de PCR entre os dois grupos. No grupo de pacientes com IAMCSST os níveis foram significantemente mais altos quando comparados aos pacientes com IAMSSST (p=0,0464. CONCLUSÃO: Pacientes com IAMCSST apresentam picos significantemente mais elevados de PCR quando comparados a pacientes IAMSSST. Esses dados sugerem que o processo inflamatório tem um papel independente na patogênese do infarto do miocárdio. Dessa forma, os níveis de PCR podem ajudar na

Plan estratégico de marketing para el desarrollo del turismo arqueológico receptivo en la ruta Nasca

OpenAIRE

Losno Valverde, Javier; Romero Pérez, Ludwen César; Salazar Bazán, Gerardo

2017-01-01

xviii, 143 h. : il. ; 30 cm. En los últimos años el sector turístico se ha diversificado y evolucionado de una forma considerable con el fin de satisfacer la expectativa de un turista cada vez más exigente y especializado. Es así que actualmente dentro del segmento de turismo cultural (TC), en el Perú encontramos al turismo arqueológico (TA), que representa el 54% de participación del flujo turístico (PromPerú, 2015). Debemos resaltar que a pesar de que el Perú posee una riq...

[Evaluation of accuracy of measuring intraocular pressure by handheld non-contact applanation tonometer].

Science.gov (United States)

Chen, X; Peng, D; Zhou, W; Zhong, Y

1995-06-01

To evaluate the accuracy of measuring intraocular pressure by handheld non-contact applanation tonometer. 58 patients' (113 eyes) intraocular pressure were measured by Keeler, non-contact tonometer and R 900 Goldmann applanation tonometer and the results of measurement of intraocular pressure by the two kinds of tonometers were compared. The mean intraocular pressure measured by non-contact is 16.31 +/- 5.59 mmHg and 17.49 +/- 6.13 mmHg (1 mmHg = 0.1333 kPa) by Goldmann applanation tonometer, respectively. There was no statistical significance to be found (P > 0.05) between the two methods. By linear correlation and regression analysis, a positive correlation was found between the two methods (r = 0.8942, b = 0.8154). The handheld non-contact tonometer has the same accuracy and reliability of measurement of intraocular pressure comparing with Goldmann applanation tonometer, and it can be used in glaucoma clinic and screening.

Retropupillary iris claw intraocular lens implantation in aphakia for dislocated intraocular lens.

Science.gov (United States)

Faria, Mun Yueh; Ferreira, Nuno Pinto; Pinto, Joana Medeiros; Sousa, David Cordeiro; Leal, Ines; Neto, Eliana; Marques-Neves, Carlos

2016-01-01

Nowadays, dislocated intraocular lenses (IOLs) and inadequate capsular support are becoming a challenge for every ophthalmic surgeon. Explantation of dislocated IOL and iris claw IOL (ICIOL) are the techniques that have been used in our ophthalmic department. The aim of this study is to report our technique for retropupillar ICIOL. This study is a retrospective case series. A total of 105 eyes with dislocated IOL from the patients at the Department of Ophthalmology in Santa Maria Hospital, a tertiary reference hospital in Lisbon, Portugal, from January 2012 until January 2016, had been analyzed. Of these 105 eyes, 66 eyes had dislocated one-piece IOL and 39 eyes had dislocated three-piece IOL. The latter underwent iris suture of the same IOL and were excluded from this study. The remaining 66 eyes with dislocated one-piece IOL underwent pars plana vitrectomy, that is, explantation of dislocated IOL through corneal incision and an implantation of retropupillary ICIOL. Operative data and postoperative outcomes included best corrected visual acuity, IOL position, intraocular pressure, pigment dispersion, clinical signs of endothelial cell loss, and anterior chamber depth. The mean follow-up was 23 months (range: 6-48 months). The mean preoperative best corrected visual acuity was 1.260±0.771 logMAR, and postoperative best corrected visual acuity was 0.352±0.400 logMAR units. Mean vision gain was 0.909 logMar units. The patients had the following complications: 1) retinal detachment was found in one patient, 2) corneal edema was found in three patients, 3) high intraocular pressure was observed in twelve patients, 4) subluxation of the IOL was observed in one patient, and 5) macular edema was found in three eyes. The results demonstrate that retropupillary ICIOL is an easy and effective method for the correction of aphakia in patients not receiving capsule support. The safety of this procedure must be interpreted in the context of a surgery usually indicated in

Sutureless, Glueless, Scleral Fixation of Single-Piece and Toric Intraocular Lens: A Novel Technique

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Aditya Kelkar

2015-07-01

Full Text Available Sutureless, glueless, scleral fixation of an intraocular lens is a known technique of fixing a lens in the scleral pockets. However, this technique is applied to single-piece and toric lenses instead of 3-piece lenses, allowing the advantage of the use of premium lenses in patients with poor capsular support. Favourable results without complications of pigment dispersion, iris transillumination defects, dysphotopsia, elevated intraocular pressure, intraocular hemorrhage and cystoid macular edema with a well-centered, stable intraocular lens have been observed in the 3-month postoperative period in both cases.

ANÁLISIS DEL VALOR DE MARCA DE LAS ENTIDADES FINANCIERAS: EL EFECTO HALO Y EL MODELO DE ELECCIÓN DISCRETA

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García de los Salmones Sánchez, M.M.

2009-01-01

Full Text Available El presente trabajo trata de cuantificar el valor de marca y el posicionamiento de las entidades financieras en dos mercados diferentes: consumidores finales y microempresas. Así mismo, se busca identificar las dimensiones de imagen de mayor peso a la hora de elegir a una entidad como la de mejor valoración global. A través del modelo de elección discreta y del análisis del efecto halo ,se comprueba la importancia del trato personal al cliente como la variable de mayor peso en la elección de marca. Además, se observa la mayor intensidad del efecto halo para las cajas de ahorros en el caso de los consumidores particulares. Sin embargo, en el segmento de microempresas, el valor de marca es superior para los bancos.

Flurbiprofen and intraocular pressure.

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Gieser, D K; Hodapp, E; Goldberg, I; Kass, M A; Becker, B

1981-07-01

Systemic or topical administration of corticosteroids may produce a rise in intraocular pressure (IOP). Nonsteroidal anti-inflammatory drugs (NSAI drugs) are alternate therapy for ocular inflammatory disease. Flurbiprofen, a new NSAI drug, was tested in double-masked fashion to delineate its effect on IOP. Flurbiprofen did not alter IOP in known high corticosteroid responders nor did it block corticosteroid-induced ocular hypertension.

Professor Peter Choyce: an early pioneer of intraocular lenses and corneal/refractive surgery.

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Pandey, Suresh K; Apple, David J

2005-06-01

Professor Peter Choyce, FRCS, DOMS, MS, was one of the pioneers of intraocular lens implant surgery. He developed an interest in artificial lens implantation following cataract surgery, a procedure that was widely criticized by the ophthalmic establishment in the UK, Europe, North America and other countries. Owing to the opposition to the intraocular lenses, Peter Choyce together with Sir Harold Ridley co-founded the International Intraocular Implant Club in 1966, which was responsible for the gradual acceptance of artificial lens implantation. Peter Choyce developed several models of intraocular lens, but did not patent the majority of them. The Choyce Mark IX, manufactured by Rayner Intraocular Lenses, became the first US Food and Drug Administration-approved intraocular lens in 1981. A review of Peter Choyce's record confirms a significant number of original innovations in the field of anterior segment surgery, including many procedures taken for granted today, but not associated with his name. These include early work on both kerato- and intraocular lens-refractive procedures, keratoprosthesis, pioneering paediatric implant procedures and others. Unfortunately his tenacious adherence to anterior chamber lens technology, while in general clinically sound, caused many to question his influence and hence he remained poorly understood even until after his death. He passed away on 8 August 2001 after a long fight with colon cancer. In this article, we provide evidence and elaborate Peter Choyce's accomplishments, which places him as one of the most innovative ophthalmologist in his surgical field in the twentieth century.

Intraocular pressure in very low birth weight preterm infants and its association with postconceptional age

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Rodrigo L. Lindenmeyer

2012-11-01

Full Text Available OBJECTIVE: To evaluate intraocular pressure in very low birth weight preterm infants and correlate it with postconceptional age. METHODS: The intraocular pressure in a prospective cohort of very low birth weight premature infants (defined as a birth weight <1,500 g and gestational age <32 weeks admitted to Hospital de Clínicas de Porto Alegre , Brazil was evaluated weekly. The evaluated outcome was the variation in the intraocular pressure following changes in the postconceptional age (defined as the gestational age at birth plus the age in weeks at the time of examination in the weeks following preterm birth. Mixed-effects models were used for the statistical analysis to determine the intraocular pressure variation according to postconceptional age, and means and 10th and 90th percentiles were calculated for the intraocular pressure values. RESULTS: Fifty preterm infants with a mean gestational age of 29.7 ± 1.6 weeks and a mean birth weight of 1,127.7 ± 222.7 g were evaluated. The mean intraocular pressure for the entire cohort considering both eyes was 14.9 ± 4.5 mmHg, and 13.5% of all recorded intraocular pressure values were greater than 20 mmHg. The analysis revealed a mean reduction in the intraocular pressure of 0.29 mmHg for each increase in postconceptional age (p = 0.047; 95% CI: -0.58 to -0.0035. The mean intraocular pressure (P10-P90 decreased from 16.3 mmHg (10.5222.16 at 26.3 weeks to 13.1 mmHg (7.28-18.92 at 37.6 weeks of postconceptional age. CONCLUSIONS: The mean intraocular pressure in very low birth weight preterm infants was 14.9 ± 4.5 mmHg. This value decreased 0.29 mmHg per week as the postconceptional age increased.

Reconstrucción paleoambiental y asociaciones de foraminiferos de la formación Tubará (plioceno temprano), sección Arroyo Piedras (norte de Colombia)

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Molinares Blanco, Carlos Eduardo

2007-01-01

La Formación Tubará en el Arroyo Piedras (169 m) es dividida en tres segmentos, interpretados como producto de la sedimentación en ambientes marino marginales relacionados con la evolución del paleo-delta del río Magdalena durante el Plioceno Temprano: El segmento inferior, es interpretado como resultado de sedimentación siliciclástica en una llanura aluvial/deltaica; el segmento intermedio, como el resultado de sedimentación lagunar y/o en pantanos costeros y el superior, como la transición ...

Intraocular manifestations of mycobacterium tuberculosis: A review of the literature

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Lauren A. Dalvin

2017-05-01

Full Text Available Mycobacterium tuberculosis: is most commonly associated with pulmonary infection. However, tuberculosis (TB can also affect the eye. TB can affect nearly any tissue in the eye, and a high index of suspicion is required for accurate diagnosis, as many of the intraocular manifestations of TB can mimic other, more common diseases. Correct diagnosis is critical because systemic anti-tuberculosis treatment may be required, and vision loss or even loss of the affected eye can occur without proper treatment. Thus, it is important for ophthalmologists and infectious disease specialists to work together to accurately diagnose and treat intraocular TB. This article reports the various known presentations of intraocular TB and reviews important elements of diagnosis and treatment. Keywords: Mycobacterium, Tuberculosis, Choroidal granuloma, Retinal vasculitis

Epithelial Downgrowth after Intraocular Surgery Treated with Intracameral 5-Fluorouracil

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Nina Ni

2015-01-01

Full Text Available Purpose. To present the clinical and histopathologic correlation of two cases of epithelial downgrowth (EDG after prior intraocular surgery. Methods. Observational case reports. Results. We present two cases of EDG occurring after intraocular surgery. In both cases, after two anterior chamber injections of 5-fluorouracil (5FU, the area of EDG initially regressed. In Case 1, a limited area of EDG eventually recurred, and penetrating keratoplasty with cryotherapy was curative. In Case 2, subsequent corneal edema required Descemet-stripping automated endothelial keratoplasty, and the patient remained clinically free of EDG without further treatment. Conclusion. Intracameral 5FU may have a role in the treatment of EDG after intraocular surgery, though its precise utilization and impact remain to be defined.

Avaliação de projetos de eficiência energética no segmento baixa renda

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Oliveira, Felipe Conti de Souza

2012-01-01

O presente trabalho visa avaliar o resultado dos projetos de eficiência energética para o segmento baixa renda, comparando resultados de projetos de troca de equipamentos obsoletos por equipamentos novos e eficientes, com projeto de cunho educativo para o consumo eficiente de energia. Faz também parte do trabalho verificar os resultados das ações dos dois projetos combinados.

Comparison between intraocular pressure spikes with water loading and postural change.

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Chong, Calum Wk; Wang, Sarah B; Jain, Neeranjali S; Bank, Cassandra S; Singh, Ravjit; Bank, Allan; Francis, Ian C; Agar, Ashish

2016-12-01

To compare the agreement between peak intraocular pressures measured through the water drinking test and the supine test, in patients with primary open angle glaucoma. Consecutive, prospective, blinded. Twenty-one patients from the Glaucoma Unit, Prince of Wales Hospital, Sydney, Australia. For the supine test, intraocular pressure was recorded immediately after the patient had lain down and at 20 and 40 min. At the second evaluation, intraocular pressure was measured in each patient after drinking 10 mL/kg body weight of water for the water drinking test. Again, all patients had their intraocular pressure measured at 20 and 40 min (t = 20 and t = 40, respectively). Patients were excluded from the study if they had pre-existing cardiac, renal or pulmonary complications or had concurrent ocular disease or an anatomical abnormality (including angle recession, peripheral anterior synechiae and developmental anomalies of the angle) that may have influenced intraocular pressure. Bland-Altman analysis. Bland-Altman analysis indicated an overall excellent agreement in terms of mean difference between methods (1.0, -1.0 and -0.90 mmHg, at 0, 20 and 40 min, respectively). Further, with the exception of t = 40, all measured time points had 95% confidence intervals within 6.5 mmHg of their mean difference on the Bland-Altman plot. There was close agreement between the intraocular pressure values of the supine test and water drinking test. However, as the water drinking test may be uncomfortable and potentially hazardous, there is potential that the supine test may be a safer and more comfortable alternative. © 2016 Royal Australian and New Zealand College of Ophthalmologists.

Carcinoma de pele no segmento craniofacial: Relato de 3 casos

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Iana Lara Pereira Maia

2014-09-01

Full Text Available O câncer de pele é a neoplasia mais frequente no Brasil. O tipo histológico mais comum é o carcinoma basocelular (CBC, 70% dos casos, seguido pelo carcinoma espinocelular (CEC e pelo melanoma. Relatamos três carcinomas de pele no segmento crânio facial, evidenciando as abordagens cirúrgicas realizadas. No caso 1, apresenta-se um CBC em hemiface submetido à exérese com retalho V-Y. No caso 2, destaca-se um CEC em couro cabeludo submetido à exérese com retalhos de rotação e da vizinhança. No caso 3, relata-se um CBC na região pré-auricular e no dorso nasal submetido à exérese com retalho de Limberg e de Rieger.

A new device to noninvasively estimate the intraocular pressure produced during ocular compression

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Korenfeld MS

2016-01-01

Full Text Available Michael S Korenfeld,1,2 David K Dueker3 1Comprehensive Eye Care, Ltd., 2Department of Ophthalmology and Visual Sciences, Washington University, Washington, MO, USA; 3Hamad Medical Corporation, Doha, Qatar Purpose: To describe a noninvasive instrument that estimates intraocular pressure during episodes of external globe compression and to demonstrate the accuracy and reliability of this device by comparing it to the intraocular pressures simultaneously and manometrically measured in cannulated eyes. Methods: A thin fluid-filled bladder was constructed from flexible and inelastic plastic sheeting and was connected to a pressure transducer with high pressure tubing. The output of the pressure transducer was sent to an amplifier and recorded. This device was validated by measuring induced pressure in the fluid-filled bladder while digital pressure was applied to one surface, and the other surface was placed directly against a human cadaver eye or in vivo pig eye. The human cadaver and in vivo pig eyes were each cannulated to provide a manometric intraocular pressure control. Results: The measurements obtained with the newly described device were within ~5% of simultaneously measured manometric intraocular pressures in both a human cadaver and in vivo pig eye model for a pressure range of ~15–100 mmHg. Conclusion: This novel noninvasive device is useful for estimating the intraocular pressure transients induced during any form of external globe compression; this is a clinical setting where no other devices can be used to estimate intraocular pressure. Keywords: glaucoma, intraocular pressure, tonometer, ocular compression

Segmentos anátomo-cirúrgicos arteriais do rim de cutia (Dasyprocta prymnolopha Anatomical-surgical arterial segments of the kidney in agouti (Dasyprocta prymnolopha

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Maria A.M. Carvalho

2008-05-01

Full Text Available Foram estudados 20 pares de rins decutias (Dasyprocta prymnolopha Wagler, 1831, com o objetivo de descrever os segmentos anátomo-cirúrgicos arteriais. As artérias renais foram injetadas com solução de Vinilite corada, e os rins foram submetidos à corrosão ácida para a obtenção dos moldes vasculares. Observou-se que as artérias renais da cutia, sempre únicas, dividiram-se em artéria setorial ventral e artéria setorial dorsal, caracterizando dois setores renais separados por plano avascular. As artérias setoriais penetraram no hilo renal (100% dos casos. Estes vasos deram origem aos ramos segmentares responsáveis pela irrigação de territórios independentes em cada setor, os segmentos arteriais renais. No rim direito foram observados 3 (60%, 4 (35% e 5 segmentos (5% no setor arterial ventral e 3 (30%, 4 (45%, 5 (20% e 6 (5% segmentos no setor dorsal e, à esquerda, 2(10%, 3 (55% e 4 (35% segmentos no setor ventral e 3 (25%, 4 (50% e 5 (25% no dorsal. Com base na distribuição arterial nos rins de cutia, observaram-se setores e segmentos arteriais independentes, sendo possível, desta forma, a realização de setoriectomia e segmentectomia nesta espécie.Twenty pairs of agouti (Dasyprocta prymnolopha Wagler, 1831 kidneys were studied to describe the arterial anatomical-surgical segments. The renal arteries were injected with stained acetate vinyl, followed by procedures of acid corrosion in order to obtain vascular casts. It was found that the renal artery is always single and bifurcated into ventral and dorsal sectorial arteries. The sectorial arteries reached the kidneys (100% of the cases through the hilus. These vessels gave origin to segmental branches responsible for kidney irrigation. At the right kidney, the ventral sectorial arteries gave origin to 3 (60% of the cases, 4 (35% and 5 (5% segmental branches; the dorsal sectorial arteries gave origin to 3 (30%, 4 (45%, 5 (20% and 6 (5% segmental arteries separated by a

Pigment dispersion and chronic intraocular pressure elevation after sulcus placement of 3-piece acrylic intraocular lens.

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Almond, M Camille; Wu, Michael C; Chen, Philip P

2009-12-01

A 55-year-old man had phacoemulsification and implantation of a 3-piece acrylic intraocular lens (IOL) (AcrySof MA60AC) in the right eye. One month postoperatively, the intraocular pressure (IOP) was 48 mm Hg and peripheral transillumination defects were noted in the iris circumferentially, with the IOL optic edge visible as a silhouette. Gonioscopy showed dense pigmentation of the trabecular meshwork in the right eye, but in the left eye, only mild trabecular meshwork pigment was seen, along with a concave peripheral iris insertion. At 21 months, the right eye required 3 medications for IOP control. While pigment dispersion has been widely reported after placement of 1-piece acrylic IOLs in the ciliary sulcus, we conclude that in susceptible individuals with a concave peripheral iris insertion, pigment dispersion can occur with sulcus placement of a 3-piece acrylic model despite its thinner optic and angulated haptics.

Posterior Segment Intraocular Foreign Body: Extraction Surgical Techniques, Timing, and Indications for Vitrectomy

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Dante A. Guevara-Villarreal

2016-01-01

Full Text Available Ocular penetrating injury with Intraocular Foreign Body (IOFB is a common form of ocular injury. Several techniques to remove IOFB have been reported by different authors. The aim of this publication is to review different timing and surgical techniques related to the extraction of IOFB. Material and Methods. A PubMed search on “Extraction of Intraocular Foreign Body,” “Timing for Surgery Intraocular Foreign Body,” and “Surgical Technique Intraocular Foreign Body” was made. Results. Potential advantages of immediate and delayed IOFB removal have been reported with different results. Several techniques to remove IOFB have been reported by different authors with good results. Conclusion. The most important factor at the time to perform IOFB extraction is the experience of the surgeon.

Bacillus cereus panophthalmitis associated with intraocular gas bubble.

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al-Hemidan, A; Byrne-Rhodes, K A; Tabbara, K F

1989-01-01

It has become increasingly apparent that Bacillus cereus can cause a severe and devastating form of endophthalmitis following penetrating trauma by a metallic object. B. cereus is an uncommon aetiological agent in non-clostridial gas-forming infections. The patient studied in this single case report showed evidence of intraocular gas mimicking gas gangrene infection. The physiology of non-clostridial bacteria producing gas from anaerobic metabolic conditions is reviewed. Further intraocular and systemic complications which may be avoided by accurate and early diagnosis and the use of recommended treatment with antibiotics such as clindamycin. Images PMID:2493262

La estrategia de la Banca Privada ante la digitalización del sector financiero

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Llamas Serrano, Andrea

2016-01-01

La revolución digital está siendo guiada por los nuevos comportamientos de los clientes, estos comportamientos suponen un imperativo para los bancos o entidades financieras quienes deben apalancarse en la digitalización para impulsar el crecimiento del negocio y el servicio al segmento de Banca Privada. "La idea de banco tradicional desaparecerá gradualmente en el fondo de nuestras vidas financieras. En el futuro, tu banco se parecerá menos a tu banco y más a Google, Facebook o Apple" Wire...

Influence of macular pigment optical density spatial distribution on intraocular scatter.

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Putnam, Christopher M; Bland, Pauline J; Bassi, Carl J

This study evaluated the summed measures of macular pigment optical density (MPOD) spatial distribution and their effects on intraocular scatter using a commercially available device (C-Quant, Oculus, USA). A customized heterochromatic flicker photometer (cHFP) device was used to measure MPOD spatial distribution across the central 16° using a 1° stimulus. MPOD was calculated as a discrete measure and summed measures across the central 1°, 3.3°, 10° and 16° diameters. Intraocular scatter was determined as a mean of 5 trials in which reliability and repeatability measures were met using the C-Quant. MPOD spatial distribution maps were constructed and the effects of both discrete and summed values on intraocular scatter were examined. Spatial mapping identified mean values for discrete MPOD [0.32 (s.d.=0.08)], MPOD summed across central 1° [0.37 (s.d.=0.11)], MPOD summed across central 3.3° [0.85 (s.d.=0.20)], MPOD summed across central 10° [1.60 (s.d.=0.35)] and MPOD summed across central 16° [1.78 (s.d.=0.39)]. Mean intraocular scatter was 0.83 (s.d.=0.16) log units. While there were consistent trends for an inverse relationship between MPOD and scatter, these relationships were not statistically significant. Correlations between the highest and lowest quartiles of MPOD within the central 1° were near significance. While there was an overall trend of decreased intraocular forward scatter with increased MPOD consistent with selective short wavelength visible light attenuation, neither discrete nor summed values of MPOD significantly influence intraocular scatter as measured by the C-Quant device. Published by Elsevier España, S.L.U.

ANÁLISIS ELECTROCARDIOGRÁFICO DE LA DISPERSIÓN DEL INTERVALO TPICO-TFINAL EN EL INFARTO AGUDO DE MIOCARDIO CON ELEVACIÓN DEL ST / Electrocardiographic analysis of the T peak-T end interval dispersion in acute myocardial infarction with ST-segment elevation

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Raimundo Carmona Puerta

2010-09-01

Full Text Available Resumen Introducción y objetivos: La dispersión del intervalo TPICO-TFINAL (Tpeak-Tend constituye una novedosa variable electrocardiográfica asociada recientemente, al riesgo de arritmias ventriculares malignas en el síndrome de Brugada, pero apenas se ha estudiado en el infarto agudo de miocardio con elevación del segmento ST, por lo que se decidió analizarlo en este contexto. Métodos: Se realizó un estudio de corte transversal donde se compararon los electrocardiogramas de 37 pacientes con infarto con elevación del segmento ST y otros 37, supuestamente sanos con respecto a las variables electrocardiográficas que evalúan la repolarización ventricular. Resultados: Se encontraron diferencias altamente significativas (p<0,001 al comparar a los pacientes infartados (QT 416,9 ± 42,3; QTc 431,4 ± 36,2 con los sanos (QT 441,2 ± 57,4 y QTc 477,6 ± 58,5, y significativas (p < 0,05 en la TPICO-TFINAL (37.2 ms vs. 21,6 ms. Existió correlación significativa entre el QT y la TPICO-TFINAL en el IMACEST inferior y ántero-septal, la que fue doblemente intensa en la localización ántero-septal (r = 0,34 vs. r = 0,80. Conclusiones: La dispersión del intervalo TPICO-TFINAL fue significativamente mayor en pacientes con infarto agudo de miocardio con elevación del segmento ST, independientemente de la localización del infarto. / Abstract Introduction and objectives: Tpeak-Tend interval dispersion is a new electrocardiographic variable recently associated to the risk of malignant ventricular arrhythmias in Brugada syndrome but it has hardly been studied in the acute myocardial infarction with ST-segment elevation. That is why it was analyzed in this context. Methods: A cross-sectional study was carried out in which the electrocardiograms of 37 patients with ST-segment elevation myocardial infarctions and other 37 apparently healthy patients (regarding electrocardiographic variables that assess ventricular repolarization were compared. Results

Bilateral spontaneous dislocation of posterior chamber intraocular lens in a patient with gyrate atrophy

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Michael Kinori

2012-01-01

Full Text Available We report a patient with gyrate atrophy, a rare metabolic disease, who had bilateral late spontaneous posterior dislocation of in-the-bag posterior chamber intraocular lens (PCIOL. He underwent pars plana vitrectomy, PCIOL retrieval and anterior chamber intraocular lens implantation in both eyes. This report may imply that patients with gyrate atrophy are at risk for spontaneous dislocation of intraocular lenses.

The Effect of Various Contact Lenses on Intraocular Pressure Measurement by Goldman Tonometer

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Monireh Mahjoob

2014-06-01

Full Text Available Background: Today, contact lenses have extensive usages. Contact lens places on cornea, so it may induce variation on cornea and these variations can influence the measurement of intraocular pressure (IOP by Goldman tonometer. The aim of this research was to study the effect of various contact lenses on measurement of intraocular pressure by Goldman tonometer. Materials and Methods: In this study, 80 subjects aged 18-25 were selected randomly among patients of Al-Zahra ophthalmology center. None of them has any eye pathological problems. Before wearing the lens, intraocular pressure was measured, and then patients were divided into two groups of soft and hard contact lenses. Soft and hard contact lenses were placed on the eye for two hours, and the intraocular pressure was measured again. Results: The mean of IOP before wearing contact lenses and two hours later was 15.96 mmHg and 13.93, s respectively. Paired test showed a significant difference between IOP before and after wearing contact lenses (p=0.001.There was no significant differences in mean of intraocular pressure decline before and after placing the contact lens in both soft and hard lenses. Conclusion: According to this study, the intraocular pressure decreases after wearing contact lenses (CL. This decline may be due to variation in properties of cornea after wearing CL that can also affect IOP measurement.

Magnetic resonance imaging diagnosis of intraocular lenses. Die kernspintomographische Diagnostik der Hinterkammerlinse

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Tosch, U. (Strahlenklinik und Poliklinik, Universitaetsklinik Rudolf Virchow, Berlin (Germany)); Bleckmann, H. (Strahlenklinik und Poliklinik, Universitaetsklinik Rudolf Virchow, Berlin (Germany)); Kaczmarek, U. (Strahlenklinik und Poliklinik, Universitaetsklinik Rudolf Virchow, Berlin (Germany))

1994-09-01

Intraocular lenses were investigated by MRI to obtain information about the quality of this method. In experimental studies, seven lenses of between 0 and 30 diopters were visualized. By MRI it was possible to differentiate the various diameters of lenses. It was not possible to discriminate the material of the intraocular lenses. After these first studies the eyes of two corpses and eight patients were investigated. Because of the resolution of MRI it was possible to tell the diopter of implanted lenses. However, by use of MRI in the regular position, a tilting or decentration of the intraocular lens was demonstrated. (orig.)

Electrochemical lysis at the stage of endoresection for large posterior intraocular tumors

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Yu. A. Belyy

2012-01-01

Full Text Available Purpose: to design the new combined technique of endoresection with intraoperative intraocular electrochemical lysis at the tumor destruction stage for large posterior intraocular tumors.Methods: 3 patients (3 eyes with large choroidal melanomas t3N0M0 (tumor thickness — 8-10 mm, base diameter — 13-15 mm, juxtapapillary localization. Mean age was 55.4 years old. Endoresection with intraoperational intraocular electrochemical lysis of the tumor was performed. Electrochemical lysis was performed with use of the technical unit ECU 300 (Soering, Germany and the original method of combined intratumoral positioning of two platinum electrodes: anode and cathode.Results: the tumor was removal completely in all 3 cases. the anatomical retinal reattachment was reached in all patients. Sclera was safe in all 3 cases. Visual acuity was not changed (NLP. At the place of the removal tumor a surgical choroidal coloboma without pigmentation all over scleral bed and periphery was shown in all cases in distant postoperative period (from 1.5 to 3 years. No local recurrences or metastasis were revealed in all patients.Conclusion: Further investigations in clinical group are necessarily to determinate the real possibilities of the combined method and the indications for endoresection with intraoperative intraocular electrochemical lysis for large intraocular tumors. 

Phacoemulsification and intraocular lens implantation in patients with oculocutaneous albinism.

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Dávila, Pedro J; Ulloa-Padilla, Jan P; Izquierdo, Natalio J

2017-01-01

To evaluate the benefits of phacoemulsification and intraocular lens implantation in patients with oculocutaneous albinism (OCA). The charts of 195 patients with OCA who visited a local eye clinic were reviewed. All of these patients had genetic linkage analysis to establish OCA type. Frequencies and Paired t-test analysis were determined. Of the 195 patients, nine (4.6%) underwent clear cornea phacoemulsification with intraocular lens implantation. Seven of the nine patients with OCA had the Hermansky-Pudlak (HPS) type 1; two had OCA type 1. Pre-operative BCVA of all eyes ranged from 1.0 to 2.3 logMAR with a mean of 1.42 logMAR and a standard deviation of 0.41 logMAR. Post-operative BCVA of all eyes ranged from 1.0 to 1.30 logMAR with a mean of 1.04 logMAR and a standard deviation of 0.10 logMAR. BCVA improved after phacoemulsification surgery and intraocular lens implantation (p = 0.002). Pre-operative astigmatism of all eyes ranged from +0.50 to +5.75 with a mean of +2.25 and a standard deviation of +2.40. Post-operative astigmatism of all eyes ranged from +0.50 to +2.00 with a mean of +1.23 and a standard deviation of +0.42. Astigmatism improved after phacoemulsification surgery and intraocular lens implantation (p = 0.05). Nine patients with OCA who underwent phacoemulsification and intraocular lens implant experienced improved visual acuity and reduced astigmatism post-operatively. These results suggest cataract surgery may improve vision and refractive errors, and thus quality of life, in patients with albinism.

X-ray diffraction enhanced imaging study of intraocular tumors in human beings

International Nuclear Information System (INIS)

Tan Gao; Wang Huaqiao; Chen Yu; Yuan Qing; Li Gang; Zhu Peiping; Zhang Xiaodan; Zhong Xiufeng; Tang Jintian

2010-01-01

Diffraction enhanced imaging (DEI) with edge enhancement is suitable for the observation of weakly absorbing objects. The potential ability of the DEI was explored for displaying the microanatomy and pathology of human eyeball in this work. The images of surgical specimens from malignant intraocular tumor of hospitalized patients were taken using the hard X-rays from the topography station of Beamline 4W1A at Beijing Synchrotron Radiation Facility (BSRF). The obtained radiographic images were analyzed in correlation with those of pathology. The results show that the anatomic and pathologic details of intraocular tumors in human beings can be observed clearly by DEI for the first time, with good visualization of the microscopic details of eyeball ring such as sclera, choroid and other details of intraocular organelles. And the best resolution of DEI images reaches up to the magnitude of several tens of μm. The results suggest that it is capable of exhibiting clearly the details of intraocular tumor using DEI method. (authors)

Caracterización del glaucoma juvenil

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Silvia Roche Caso

2011-03-01

Full Text Available INTRODUCCIÓN. El glaucoma no es frecuente en los niños, pero cuando ocurre sus síntomas son poco perceptibles y produce graves consecuencias para la salud visual. El objetivo de este estudio fue caracterizar, desde las aristas clínica y epidemiológica, a los pacientes con glaucoma juvenil atendidos en los servicios de oftalmología de los Hospitales Pediátricos del Cerro y «Pedro Borrás», en Ciudad de La Habana, en el período comprendido entre enero de 2008 y diciembre de 2009. MÉTODOS. Se realizó un estudio epidemiológico longitudinal y prospectivo, cuyo universo estuvo constituido por 176 pacientes entre 5 y 18 años de edad, con presunto glaucoma. La muestra, después de aplicados los criterios de inclusión y exclusión, quedó conformada por 38 casos. Se analizaron las variables: edad al momento del diagnóstico, sexo, color de la piel, antecedentes familiares según grado de parentesco, agudeza visual máxima corregida, tipo de defecto refractivo, características del ángulo camerular, espesor corneal central, valor de la presión intraocular, alteraciones fundoscópicas y campimétricas. RESULTADOS. En la mayoría de los pacientes el diagnóstico de glaucoma juvenil constituyó un hallazgo. La mediana de edad al momento del diagnóstico fue de 12,5 años, con ligero predominio de varones y de la piel no blanca. Fue más frecuente el antecedente de glaucoma en familiares de segundo grado de consanguinidad. La mayoría de los casos tenía visión óptima, algún grado de miopía y ángulo abierto sin alteraciones evidentes del ángulo camerular, entre las cuales la más frecuente fue la presencia de procesos iridianos prominentes. CONCLUSIONES. Predominaron la disminución moderada del espesor corneal y valores medios de presión intraocular de 26,91 mm Hg. La alteración fundoscópica encontrada con mayor frecuencia fue la excavación papilar moderada (entre 0,4 y 0,5 y como lesión campimétrica, el aumento de la mancha

[Changes in intraocular pressure depending on posture].

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Barac, Ramona; Pop, Monica; Tătaru, C; Gheorghe, A; Bădescu, Silvia; Stanciu, Maria; Burcea, M

2014-01-01

Glaucoma is an important eye disease that, left untreated, causes irreversible blindness by affecting optic nerve threads. Decreasing intraocular pressure and maintaining it at a low level throughout the day is one of the objectives of antiglaucoma therapy. This is a prospective study conducted on a sample of 80 patients who presented at "Emergency Eye Hospital" Bucharest between 1st of December 2013 30th of July 2014. Patients were divided into two groups: 40 patients with glaucoma and 40 patients without glaucoma (control group). THE OBJECTIVE OF THE STUDY: To determine changes in intraocular pressure that may occur depending on body posture and the correlations between changes in intraocular pressure and glaucoma, obesity, hypertension. These IOP changes may be important in the progression of glaucoma regarding that one third of our time is spent on supine position during night. RESULTS AND CONCLUZIONS: IOP varies from sitting down to supine position. IOP increases in supine in most patients (with or without glaucoma) with an average of 1.25 mmHg. The increase among patients with glaucoma is higher (1.67 mmHg) compared to those without glaucoma (0.82 mmHg). In patients with hypertension and glaucoma, IOP increased with 2.62 mmHg. In patients with hypertension and obesity IOP increased with 2.5 mmHg.

Near-infrared transillumination photography of intraocular tumours.

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Krohn, Jørgen; Ulltang, Erlend; Kjersem, Bård

2013-10-01

To present a technique for near-infrared transillumination imaging of intraocular tumours based on the modifications of a conventional digital slit lamp camera system. The Haag-Streit Photo-Slit Lamp BX 900 (Haag-Streit AG) was used for transillumination photography by gently pressing the tip of the background illumination cable against the surface of the patient's eye. Thus the light from the flash unit was transmitted into the eye, leading to improved illumination and image resolution. The modification for near-infrared photography was done by replacing the original camera with a Canon EOS 30D (Canon Inc) converted by Advanced Camera Services Ltd. In this camera, the infrared blocking filter was exchanged for a 720 nm long-pass filter, so that the near-infrared part of the spectrum was recorded by the sensor. The technique was applied in eight patients: three with anterior choroidal melanoma, three with ciliary body melanoma and two with ocular pigment alterations. The good diagnostic quality of the photographs made it possible to evaluate the exact location and extent of the lesions in relation to pigmented intraocular landmarks such as the ora serrata and ciliary body. The photographic procedure did not lead to any complications. We recommend near-infrared transillumination photography as a supplementary diagnostic tool for the evaluation and documentation of anteriorly located intraocular tumours.

AISLAMIENTO DE CLONES CON ACTIVIDAD ENDO-b-1,4-GLUCANASA A PARTIR DE UN SEGMENTO DE ADN DE 13KB DE Clostridium sp IBUN22A

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I. Roncancio-Sánchez

2006-06-01

Full Text Available La producción de combustibles, solventes y algunos productos químicos a partir de sustratos celulósicos usando microorganismos ofrece una ventaja frente a los de origen fósil. Un acercamiento prometedor ha sido la implementación de ingeniería genética utilizando genes de enzimas involucradas en la degradación de desechos celulósicos. En la última década se han generado bibliotecas genéticas para proveer enzimas celulolíticas, que hagan el proceso más rentable, lo cual permitiría aprovechar mejor residuos celulósicos disponibles. Este trabajo describe el aislamiento de dos fragmentos de ADN que expresan actividad endo-β-1,4-glucanasa, a partir de un segmento ADN de 13Kb (clon 02080-25 aislado de una biblioteca genómica de la cepa nativa Clostridium sp IBUN22A. El aislamiento de la región codificadora se realizó a través de pruebas de inducción de la actividad, análisis por restricción del segmento y de una sub-biblioteca con la enzima Sau3A I. 325 clones fueron obtenidos, de los cuales 271 tenían inserto. El tamizaje molecular de estos últimos mostró que siete clones presentaron tamaños entre 3500pb y 7000pb y el tamizaje enzimático con carboximetilcelulosa como sustrato permitió el aislamiento de los clones pBSh-37 y pBSh-26 con la actividad endo-β-1,4-glucanasa original, de tamaños de inserto de 627pb y 879pb respectivamente. Este trabajo es el punto de partida para el aislamiento de enzimas de alto potencial biotecnológico.

Intraocular pressure measurement: Goldmann Applanation Tonometer vs non contact airpuff tonometer.

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Shah, Masood Alam; Bin Saleem, Khalid; Mehmood, Talat

2012-01-01

An accurate assessment of Intraocular pressure (IOP) is vital in establishing diagnosis of Glaucoma and decision making regarding various treatment modalities available. The purpose of this study is to compare Goldmann Applanation Tonometer (GAT) with Air puff tonometer. Cross-sectional comparative study conducted. 73 eyes from 73 patients were included in this study and intraocular pressure (IOP) was measured by GAT and PT100 at Sheikh Khalifa Bin Zayed Hospital, Muzaffarabad, Benazir Shaheed Teaching Hospital, Abbottabad. Mean age of the patients was 53.17 +/- 13.80 years. Mean IOP measurements showed significant differences in measurements performed by the two tonometers (p contact air-puff tonometer, the Goldmann applanation tonometer is a reliable and consistent technique for measurement of intraocular pressure.

Implante de lente intraocular en niños como solución a los problemas sociales de la ceguera por catarata congénita Intraocular lens implants for children as a solution to social problems caused by blindness from congenital cataract

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Rosa María Naranjo Fernández

2011-12-01

Full Text Available Se estima en alrededor de 1,5 millones el número de niños con baja visión o ciegos legales, alrededor del mundo, con una prevalencia de 1 a 4 por cada 10 000 niños en los países industrializados y de 5 a 15 en los países en vías de desarrollo. La prevalencia de la ceguera infantil en América Latina es de 0,6 %, lo cual representa 900 niños por cada millón de habitantes que necesitan asistencia para visión baja. La prevalencia de ceguera por catarata congénita puede estar entre 1 y 4 por cada 10 000 niños en países subdesarrollados y entre 0,1 a 0,4 en países industrializados. En Cuba con una población de 2,1 millones de habitantes menores de 15 años la catarata congénita es considerada la segunda causa de ceguera infantil. En los últimos 20 años ha revolucionado completamente el tratamiento quirúrgico de la catarata en niños, por el desarrollo alcanzado en el perfeccionamiento de las técnicas quirúrgicas. En nuestro país la cirugía de catarata pediátrica con implante de lente intraocular comenzó en el año 1990, posterior a la inauguración del centro de Microcirugía Ocular en el año 1988. Queda demostrada la importancia de la cirugía de catarata pediátrica con implante de lente intraocular, como una solución a los problemas sociales ocasionados por el déficit visual del paciente no tratado oportunamente, con la aplicación de tecnología moderna se logra mejorar la calidad de vida de los niños, tanto social como educacional, incorporándolos de una forma activa a la sociedad.It is estimated that around 1,5 million children with low vision or legally blind exist worldwide, with a prevalence of 1 to 4 per 10 000 children in the industrialized countries and of 5 to 15 in the developing countries. The prevalence rate of the infantile blindness in Latin America is 0,6 %, which represents 900 children per one million inhabitants who need medical assistance due to low vision. The prevalence of blindness due to

Ocular onchocerciasis in the Yanomami communities from Brazilian Amazon: effects on intraocular pressure.

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Herzog-Neto, Guilherme; Jaegger, Karen; Nascimento, Erika S do; Marchon-Silva, Verônica; Banic, Dalma M; Maia-Herzog, Marilza

2014-01-01

To determine the influence of onchocercal eye disease on the intraocular pressure of the Yanomami Tribe Aratha-ú of Roraima State, Brazil, considered endemic for onchocerciasis, a total of 86 patients were submitted to an ophthalmologic exam that included external examination, slit lamp examination, intraocular pressure measurement, and a fundus ophthalmoscope examination. A high prevalence of onchocerciasis-related eye lesions was encountered in 68.6% of the patients. Punctate keratitis and microfilariae in the anterior chamber were found in ∼28%. The mean of intraocular eye pressure found was 10.47 mm of Hg.

Sensitivity of the corneal-plane refractive compensation to change in power and axial position of an intraocular lens

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W. F. Harris

2009-12-01

Full Text Available If an intraocular lens is displaced or if its power is changed what are the consequences for the refractive compensation of the eye?  Gaussian optics is used to obtain explicit formulae for the sensitivityof the corneal-plane refractive compensation (also called the refraction, refractive state, etc to change in power and axial displacement of a thin intraocular lens implanted in a simple eye.  In particular, for a pseudophakic Gullstrand simplified eye with intraocular lens placed 5 mm behind the cornea the sensitivity to errors in the power of the intraocular lens is about  71 . 0 − 71 for an intraocular lens of power   for an intraocular lens of power 20 D, that is, the refractive compensation decreases by about 0.71 dioptres per dioptre increase in the power of the intraocular lens.  More generally the sensitivity is approximately  ( m   0037 . 0 63 . 0 F − − 0.63 ( 003 . 0 63 . 0 − − (0.0037mF where FI is the power of the intraocular lens.  Also for Gullstrand’s simplified eye the sensitivity of refractive compensation to axial displacement of the intraocular lens is approximately linear in FI about  (64D FI, in fact.  That is, for each dioptre of the power of the intraocular lens the refractive compensation increases by about 0.064 dioptres per millimetre of axial displacement towards the retina. 

Intraocular Pressure Increases After Intraarticular Knee Injection With Triamcinolone but Not Hyaluronic Acid.

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Taliaferro, Kevin; Crawford, Alexander; Jabara, Justin; Lynch, Jonathan; Jung, Edward; Zvirbulis, Raimonds; Banka, Trevor

2018-03-09

Intraarticular steroid injections are a common first-line therapy for severe osteoarthritis, which affects an estimated 27 million people in the United States. Although topical, oral, intranasal, and inhalational steroids are known to increase intraocular pressure in some patients, the effect of intraarticular steroid injections on intraocular pressure has not been investigated, to the best of our knowledge. If elevated intraocular pressure is sustained for long periods of time or is of sufficient magnitude acutely, permanent loss of the visual field can occur. How does intraocular pressure change 1 week after an intraarticular knee injection either with triamcinolone acetonide or hyaluronic acid? A nonrandomized, nonblinded prospective cohort study was conducted at an outpatient, ambulatory orthopaedic clinic. This study compared intraocular pressure elevation before and 1 week after intraarticular knee injection of triamcinolone acetonide versus hyaluronic acid for management of primary osteoarthritis of the knee. Patients self-selected to be injected in their knee with either triamcinolone acetonide or hyaluronic acid before being informed of the study. The primary endpoint was intraocular pressure elevation of ≥ 7 mm Hg 1 week after injection. This cutoff is determined as the minimum significant pressure change in the ophthalmology literature recognized as an intermediate responder to steroids. Intraocular pressure was measured using a handheld Tono-Pen® applanation device. This device is frequently used in intraocular pressure measurement in clinical and research settings; 10 sequential measurements are obtained and averaged with a confidence interval. Only measurements with a 95% confidence interval were used. Over a 6-month period, a total of 96 patients were approached to enroll in the study. Sixty-two patients out of 96 approached (65%) agreed. Thirty-one (50%) were injected with triamcinolone and 31 (50%) were injected with hyaluronic acid. Patients

Intraocular gnathostomiasis: report of a case and review of literature.

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Pillai, Gopal S; Kumar, Anil; Radhakrishnan, Natasha; Maniyelil, Jayasree; Shafi, Tufela; Dinesh, Kavitha R; Karim, Shamsul

2012-04-01

Intraocular gnathostomiasis is a rare parasitic infection caused by the third-stage larvae of spiruroid nematode Gnanthostoma spp. seen mostly in tropical and subtropical regions. It is a food-borne zoonosis caused by ingestion of raw or undercooked freshwater fish, amphibians, reptiles, birds, and mammals, all of which are known to harbor advanced third-stage larvae of Gnanthostoma spp. To date, 74 cases of intraocular gnathostomiasis have been reported from 12 different countries. Only four countries have reported more than 10 cases each, and India shares the rare distinction of being one of them, with 14 cases. Surprisingly, not a single case of cutaneous gnanthostomiasis has ever been reported from India. We present one such case of intraocular gnathostomiasis in a 41-year-old male who presented with an actively motile worm attached to the iris, and we review the pertinent literature of all such cases reported from India.

Sutureless Intrascleral Fixated Intraocular Lens Implantation.

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Karadag, Remzi; Celik, Haci Ugur; Bayramlar, Huseyin; Rapuano, Christopher J

2016-08-01

To review sutureless intrascleral intraocular lens (IOL) fixation methods. Review of published literature. Sutureless intrascleral IOL fixation methods are newer and have been developed to eliminate the suture-related complications of sutured scleral fixation methods such as suture-induced inflammation or infection and IOL dislocation or subluxation due to suture degradation or suture breakage. Sutureless intrascleral fixation methods aim for intrascleral haptic fixation to achieve stability of the IOL. Various methods of sutureless scleral fixation have been described. Using a needle, a blade, or a trochar, sclerostomies are created in all techniques for intraocular access. Some surgeons prefer to create scleral tunnels, whereas others use scleral flaps for scleral fixation of haptics. The stability of IOLs is attained by the scar tissue formed around the haptics. Short-term results of these new methods are acceptable; studies including more cases with longer follow-up are needed to determine their long-term success. [J Cataract Refract Surg. 2016;32(9):586-597.]. Copyright 2016, SLACK Incorporated.

Resposta pressórica após exercício resistido de diferentes segmentos corporais em hipertensos Respuesta presórica después de ejercicio de resistencia de diferentes segmentos corporales en hipertensos Pressure response after resistance exercise for different body segments in hypertensive people

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Adriana Marques Battagin

2010-09-01

Full Text Available FUNDAMENTO: O exercício resistido tem sido atualmente recomendado como componente adjunto do exercício aeróbico no programa de treinamento físico direcionado ao tratamento e controle da hipertensão arterial sistêmica (HAS. Entretanto, o mesmo ainda não tem sido amplamente incorporado na prática clínica, possivelmente pela escassez de evidências disponíveis sobre os limites seguros da resposta pressórica aguda nessa modalidade. OBJETIVO: Investigar o efeito agudo do exercício resistido progressivo, de diferentes segmentos corporais, na resposta pressórica de pacientes com hipertensão arterial sistêmica (HAS controlada. MÉTODOS: Vinte e cinco pacientes (14 mulheres com HAS controlada com medicamentos (64,5 ± 10,8 anos de idade e sedentários, realizaram três visitas para uma sessão de exercício resistido progressivo aleatória, nos seguintes grupos musculares: quadríceps femoral, grande dorsal e bíceps braquial. Medidas de pressão arterial foram obtidas em todas as visitas no repouso, imediatamente após cada série de exercício e após 5 minutos de recuperação. RESULTADOS: Imediatamente após o exercício resistido agudo, houve significante aumento das pressões sistólicas, sem modificações significantes das pressões diastólicas, quando comparadas aos níveis pressóricos de repouso, para todos os grupos musculares e para todas as intensidades avaliadas. Adicionalmente, observou-se maior tendência à elevação da pressão sistólica quando o quadríceps femoral foi exercitado em alta intensidade. CONCLUSÃO: O exercício resistido de diferentes segmentos corporais promoveu aumentos similares e seguros dos níveis de pressão arterial sistólica, embora com tendência a maior resposta desta quando exercitados grandes grupos musculares em cargas elevadas.FUNDAMENTO: El ejercicio de resistencia ha sido actualmente recomendado como componente adjunto del ejercicio aeróbico en el programa de entrenamiento f

Obesidade em adultos de segmentos pauperizados da sociedade

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Marinho Sheila Pita

2003-01-01

Full Text Available O aumento da incidência de obesidade em segmentos pauperizados da sociedade levanta a questão sobre sua etiologia. Este trabalho pretende caracterizar a prevalência de sobrepeso e obesidade nestas populações. Participaram da pesquisa 390 famílias, incluindo 782 indivíduos com idades iguais ou maiores de 19 anos, dos quais 360 (46,0% eram homens e 422 (54,0% mulheres. As prevalências de obesidade entre os homens das zonas urbana e rural foram de 5,6% e 5,8%, respectivamente. Em relação ao sobrepeso, esta incidência foi de cerca de 25% em ambas as regiões, evidenciando-se aumento com a idade. As prevalências de obesidade entre homens e mulheres foram, respectivamente, de 5,6% e 21,6% (p<0,05. Entre as mulheres a ocorrência de obesidade aumentou discretamente com a idade, com prevalências padronizadas de 19,8% na zona urbana e 23,4% na rural. Considerando tratar-se de uma população pauperizada, o excesso de peso, que atinge principalmente as mulheres, tem etiologia complexa e precisa ser melhor estudado.

Microscopic and spectroscopic investigation of an explanted opacified intraocular lens

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Simon, V., E-mail: viosimon@phys.ubbcluj.ro [Babeş-Bolyai University, Faculty of Physics and Interdisciplinary Research Institute on Bio-Nano-Sciences, 400084 Cluj-Napoca (Romania); Radu, T.; Vulpoi, A. [Babeş-Bolyai University, Faculty of Physics and Interdisciplinary Research Institute on Bio-Nano-Sciences, 400084 Cluj-Napoca (Romania); Rosca, C. [Optilens Clinic of Ophthalmology, 400604 Cluj-Napoca (Romania); Eniu, D. [Iuliu Haţieganu University of Medicine and Pharmacy, Department of Molecular Sciences, 400349 Cluj-Napoca (Romania)

2015-01-15

Highlights: • Changes on intraocular lens (IOL) surface after implantation. • Partial opacification of IOL central area. • Elemental composition on IOL surface prior to and after implantation. • First XPS depth profiling examination of the opacifying deposits. • Cell-mediated hydroxyapatite structuring. - Abstract: The investigated polymethylmethacrylate intraocular lens explanted an year after implantation presented a fine granularity consisting of ring-like grains of about 15 μm in diameter. In order to evidence the changes occurred on intraocular lens relative to morphology, elemental composition and atomic environments, microscopic and spectroscopic analyses were carried out using scanning electron microscopy (SEM), Fourier transform infrared (FTIR), energy-dispersive X-ray (EDS), and X-ray photoelectron (XPS) spectroscopies. The results revealed that the grains contain hydroxyapatite mineral phase. A protein layer covers the lens both in opacified and transparent zones. The amide II band is like in basal epithelial cells. The shape and size of the grains, and the XPS depth profiling results indicate the possibility of a cell-mediated process involving lens epithelial cells which fagocitated apoptotic epithelial cells, and in which the debris derived from cell necrosis were calcified. To the best of our knowledge, this is the first investigation on explanted intraocular lenses using XPS depth profiling in order to examine the inside of the opacifying deposits.

Optimización del proceso de producción de la Fábrica de Calzado Giancarlo

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Cazorla Orellana, Pablo Alberto; Peralta Molina, Paúl Fernando

2007-01-01

La vida moderna en constante desarrollo y la actual globalización de los negocios, determinan la necesidad de expandir los mercados de la Fábrica de Calzado Giancarlo a través del aumento de nuestra capacidad de reacción, haciéndonos más competitivos, fortaleciendo las estructuras empresariales e identificado claramente los segmentos a los cuales nos dirigimos. Las herramientas metodológicas con las que cuenta la Ingeniería Industrial permiten obtener ventajas considerables en la manufact...

Intravitreal triamcinolone for intraocular inflammation and associated macular edema

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Steven M Couch

2008-11-01

Full Text Available Steven M Couch, Sophie J BakriMayo Clinic Department of Ophthalmology, Mayo Clinic, Rochester, MN, USAAbstract: Triamcinolone acetonide (TA is a corticosteroid that has many uses in the treatment of ocular diseases because of its potent anti-inflammatory and anti-permeability actions. Intraocular inflammation broadly referred to as uveitis can result from several causes, including the immune system and after ophthalmic surgery. One of the most common reasons for vision loss with uveitis is macular edema. TA has been used for many years as an intravitreal injection for the treatment of ocular diseases. Several case control studies have been reported showing the efficacy of TA in the treatment of intraocular inflammation and associated macular edema caused by Behcet’s disease, Vogt-Koyanagi-Harada syndrome, sympathetic ophthalmia and white dot syndromes. It has also been shown efficacious in cases of pars planitis and idiopathic posterior uveitis. Some authors have reported its use in postoperative cystoid macular edema. Many of the studies on the use of TA in controlling intraocular inflammation and concomitant macular edema showed its effect to be transient in many patients requiring reinjection. Complications can arise from intravitreal injection of TA including elevated intraocular pressure and cataract. Rarely, it can be associated with infectious and non-infectious endophthalmitis. TA may be useful as an adjuvant in the treatment of uveitis and its associated macular edema, especially in patients resistant or intolerant to standard treatment.Keywords: triamcinolone acetonide, Behcet’s disease, sympathetic ophthalmia, Vogt-Koyanagi-Harada syndrome, white dot syndromes, uveitis, cataract surgery, macular edema, endophthalmitis

Intraocular lens fabrication

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Salazar, Mike A. (Albuquerque, NM); Foreman, Larry R. (Los Alamos, NM)

1997-01-01

This invention describes a method for fabricating an intraocular lens made rom clear Teflon.TM., Mylar.TM., or other thermoplastic material having a thickness of about 0.025 millimeters. These plastic materials are thermoformable and biocompatable with the human eye. The two shaped lenses are bonded together with a variety of procedures which may include thermosetting and solvent based adhesives, laser and impulse welding, and ultrasonic bonding. The fill tube, which is used to inject a refractive filling material is formed with the lens so as not to damage the lens shape. A hypodermic tube may be included inside the fill tube.

Outcomes and Complications of Scleral-Fixated Intraocular Lens Combined with Ahmed Tube Surgery

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Nikhel Sachdev

2018-01-01

Full Text Available Background. To evaluate the outcome and complications of transscleral suture-fixated posterior chamber intraocular lens (PCIOL implantation combined with Ahmed glaucoma valve (AGV surgery in Asian eyes. Design. This was a retrospective study that included 22 eyes from 22 participants. The surgeries were performed at Singapore’s National University Hospital. Participants underwent an Ahmed tube surgery, together with transscleral suture-fixated posterior chamber intraocular lens. Main Outcome Measures. Complete success was defined as 6 ≤ intraocular pressure (IOP ≤ 21 mmHg without medications at the last follow-up visit, with no reoperation required and no progression to no perception of light (NPL. Results. At the last follow-up, there was a significant reduction in mean IOP (22.4 ± 6.5 mmHg versus 13.9 ± 3.9 mmHg; p<0.001 and mean number of intraocular pressure-lowering medications (2.45 ± 1.30 versus 0.05 ± 0.21; p<0.001. There was no significant change in visual acuity [1.43 ± 1.21 (LogMAR versus 1.09 ± 1.31 (p=0.204]. Sixteen eyes (72.7% achieved complete success. The 3 commonest complications were bullous keratopathy, choroidal detachment, and displacement of intraocular lens. Conclusion and Relevance. This technique showed good success for intraocular pressure control and vision preservation. Postoperative complications were relatively common although most were self-limiting. Patients at increased risk of trabeculectomy failure may be suitable for this procedure.

Intraocular foreign-body hazard during vitrectomy.

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Bovino, J A; Marcus, D F

1982-03-01

We noted two instances of forceps-induced fragmentation of the bar used for scleral plug storage during vitreous surgery. The silicone bar material was adherent to the plug in both cases. Because this represents a significant intraocular foreign body hazard, the scleral plug should be carefully inspected before insertion.

Bilateral Acute Angle-closure after Intraocular Surgery.

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Hoskens, Kirsten; Pinto, Luis Abegão; Vandewalle, Evelien; Verdonk, Nancy; Stalmans, Ingeborg

2014-01-01

We report the case of a 75-year-old woman who developed an acute bilateral angle-closure associated with choroidal effusion a day after an uneventful cataract surgery. The same patient had undergone a similarly uneventful cataract surgery two weeks before, under the same protocol, with no postoperative complication in the other eye. Medical treatment, including the use of oral sulfamide-related drugs (acetazolamide), topical beta-blockers and steroids led to a gradual decrease in intraocular pressure (IOP) and choroidal effusion. Despite initial reports suggesting a link between sulfamide-exposure and these rare forms of angle-closure, our report would suggest a more complex pathophysiology behind this intriguing phenomenon. How to cite this article: Hoskens K, Pinto LA, Vandewalle E, Verdonk N, Stalmans I. Bilateral Acute Angle-closure after Intraocular Surgery. J Curr Glaucoma Pract 2014;8(3):113-114.

Angioplastia primaria optimizada: comparación de tres estrategias de administración de ABCIXIMAB intracoronario y sus efectos sobre el tamaño del infarto valorado mediante resonancia magnética cardíaca

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Santos González, Belén

2016-01-01

Se ha demostrado ampliamente que el intervencionismo coronario percutáneo (ICP), cuando está disponible de forma inmediata, es el tratamiento de elección del Síndrome Coronario Agudo con elevación del segmento ST (SCACEST). Existe suficiente evidencia para afirmar que la angioplastia primaria es superior a la trombolisis intravenosa consiguiendo un mayor grado de permeabilidad de la arteria, reduciendo el riesgo de reoclusión y de reinfarto. Todos estos efectos se traducen en mejora de la sup...

Changes of intraocular pressure in different trimesters of pregnancy among Syrian refugees in Turkey: A cross-sectional study.

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Tolunay, Harun Egemen; Özcan, Sait Coşkun; Şükür, Yavuz Emre; Özarslan Özcan, Deniz; Adıbelli, Fatih Mehmet; Hilali, Neşe Gül

2016-06-01

To evaluate the physiologic changes in intraocular pressure associated with pregnancy in healthy Syrian refugee women in Turkey. In this cross-sectional study, intraocular pressures were measured using a Goldmann tonometer in 235 patients in the first, second, and third trimester of pregnancy and puerperium among Syrian refugees in Turkey. Mean intraocular pressures values of the right eye were 15.5±2.5 mmHg, 14.4±1.4 mmHg, 13.9±1.6 and 14.7±1.9 mmHg in the three trimesters and puerperium, respectively. Mean intraocular pressures values of the left eye were 15.3±1.6 mmHg, 14.3±1.4 mmHg, 13.9±1.6 and 15.3±2.2 mmHg in the three trimesters and puerperium, respectively. The mean intraocular pressures values measured from both eyes were significantly higher in first trimester and puerperal period than in the third trimester (p<0.001). Changes in the intraocular pressure in pregnancy are common and temporary. This study shows the baseline changes in the intraocular pressure during pregnancy in healthy women. Therefore, we cannot extrapolate the results to the whole eye. A decrease in intraocular pressures was shown in healthy pregnant women.

INTRAOCULAR TRANSMISSIBLE VENEREAL TUMOR IN A DOG TUMOR VENÉREO TRANSMISSÍVEL INTRA-OCULAR EM CÃO

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Geórgia Nadalini Rodrigues

2001-02-01

Full Text Available Canine transmissible venereal tumor (TVT is a round cell neoplasm occurring on the external genital mucosa of male and female dogs. Transmission is by cell implantation during coitus, licking, or other interaction between an affected dog and a susceptible host. Metastasis of the tumor rarely occurs. This report describes an unusual presentation of TVT with intraocular involvement and inguinal lymph nodes metastasis. The subject was a six-year-old, intact, male, Brazilian Terrier dog with a history of abnormal masses in the right eye, penis and several subcutaneous nodules in the inguinal area. Histopathological examination of the eye specimens as well as cytologic examination of penile mass and subcutaneous nodules revealed similar findings. The examination revealed round cells containing a large nuclei with prominent, central located nucleoli and a pale cytoplasm containing few small, clear round vacuoles. Histologically, the subcutaneous nodules in the inguinal area were lymph nodes. The diagnosis of TVT with intraocular involvement and lymph nodes metastasis was based on clinical, cytologic and histopathologic findings.Tumor venéreo transmissível (TVT é uma neoplasia de células redondas que acomete a mucosa genital externa de cães, machos e fêmeas. A transmissão decorre da implantação de células tumorais durante o coito, brigas ou interações entre animais portadores e susceptíveis. Existem relatos referindo-se a localizações atípicas do TVT, mas metástases raramente ocorrem. O presente relato descreve um caso incomum de TVT, com acometimento intra-ocular e metástases nos linfonodos ingüinais, num cão Terrier Brasileiro, com seis anos de idade. O animal apresentava massas anormais de tecido no olho direito, extremidade do pênis e aumento de volume de linfonodos da região ingüinal. A histopatologia do globo ocular e as citologias da massa peniana e dos nódulos subcutâneos evidenciaram aspectos citológicos semelhantes

MARKETING DE RELACIONAMENTO E FIDELIZAÇÃO: UMA ABORDAGEM NO SEGMENTO “CLIENTE ESTILO” EM UMA AGÊNCIA BANCÁRIA

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Adriano Moreira dos Santos

2011-08-01

Full Text Available Este trabalho tem como tema o Marketing de Relacionamento, que diz respeito à fidelização de clientes, consequência de um processo de segmentação com ênfase no atendimento. Objetiva estudar e analisar o atendimento diferenciado aos clientes do Segmento Estilo, pessoa física, da Agência X, do Banco do Brasil, identificando e comentando os possíveis atributos que influenciam na satisfação e, por sua vez, na fidelização desses clientes. Desenvolve-se este estudo através de levantamento bibliográfico e documental, bem como por meio de uma pesquisa do tipo descritiva, a partir de estudo de caso em uma agência bancária, onde são pesquisados vários atributos em relação ao atendimento, aos serviços prestados pelo banco, ao relacionamento do banco com o cliente, questões que interferem na fidelização e na satisfação dos clientes do segmento estudado. Ao final deste estudo, confirmou-se que vários aspectos devem ser considerados no atendimento diferenciado aos clientes do segmento pesquisado, a fim de satisfazê-los e fideliza-los. Dentre esses aspectos, destacam-se: a eficiência e agilidade no atendimento, indo ao encontro das necessidades dos clientes; a capacidade de soluções de problemas; o bom relacionamento entre cliente e banco; o atendimento segmentado fortalece a relação de parceria entre banco e cliente. Palavras-chave: Marketing. Relacionamento. Fidelização. Cliente Estilo. Agência Bancária.

Análise de rentabilidade dos segmentos de mercado de empresa distribuidora de mercadorias

OpenAIRE

Wernke,Rodney; Lembeck,Marluce

2004-01-01

O artigo apresenta possíveis aplicações do conceito de margem de contribuição para avaliação de desempenho de segmentos comerciais, voltando-se mais especificamente para empresas que operam no ramo de distribuição de mercadorias. São comentadas e exemplificadas situações em que a margem de contribuição pode servir como ferramenta de apoio aos gestores da área de vendas para averiguar a rentabilidade de produtos, linhas de mercadorias, territórios de venda, canais de distribuição, clientes e v...

Estudio cefalométrico del hueso hioides en niños respiradores bucales de 11 años.: Segunda parte

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Dariel Carulla Martínez

2010-06-01

Full Text Available Se realizó una correlación entre el comportamiento de la posición del hioides con el crecimiento del maxilar y de la mandíbula, los ángulos cérvico-basio-hioideo y el espacio aéreo póstero-inferior, desde el punto de vista cefalométrico, a un grupo de pacientes respiradores bucales. Se analizaron las historias clínicas de 60 pacientes, de 11 años de edad, que acudieron a la consulta de Ortodoncia en el área de salud de la Facultad de Estomatología. Se utilizaron matrices de coeficiente de correlación lineal de Pearson, para evaluar la posición del hioides con respecto a dichas variables. Se encontró descenso del hueso, y relaciones significativas con las variables que reflejan el crecimiento maxilar y mandibular, así como la posición de la columna vertebral (segmento cervical y de la cabeza, además del espacio aéreo posterior de la faringe, con un nivel de significación del 5 %.

Estudio de los factores de compra de productos retro y segmentación del mercado potencial retro

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José S. Clemente Ricolfe

2013-01-01

Full Text Available El objetivo de este artículo es analizar el comportamiento del mercado potencial de compradores de productos retro; para ello, se realizó una revisión bibliográfica que permitió definir los motivos de compra considerados en este tipo de productos. Asimismo, se destaca que en la actualidad existen pocos trabajos cuantitativos sobre los motivos de compra y la segmentación del mercado potencial de productos retro. Partiendo de este problema, se ha recurrido al análisis factorial, junto a un análisis cluster, usando los datos obtenidos mediante una encuesta. Así, se encontraron tres factores de compra de productos retro: características del producto, sentimientos actuales de diferenciación y sentimientos pasados; de igual forma, se detectó la existencia de dos segmentos claramente diferenciados: consumidor emotivo y consumidor comercial.

Factores de calidad del servicio en el transporte público de pasajeros: estudio de caso de la ciudad de Toluca, México

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Óscar Sánchez-Flores

2010-01-01

Full Text Available En este artículo se identifican, ponderan y valoran los factores que intervienen en la percepción de la calidad de servicio del transporte público en un corredor urbano que se caracteriza por una gestión delegada con tarifa fija y competencia en calidad. Mediante un modelo logit con especificación lineal de la función de utilidad, se estiman los coeficientes de cada factor de calidad de servicio para diferentes segmentos y estratos de la población. Los resultados de la estimación econométrica determinan la importancia, peso y valor de cada factor en términos de utilidad. De esta manera se obtiene que los factores principales que determinan la calidad del servicio son: el estado físico de los autobuses, la forma de manejo del conductor, la tarifa (costo del viaje, el tiempo que está dentro del autobús (tiempo de viaje y el trato al usuario.

[Hormonal homeostasis and intraocular pressure in chronic emotional stress caused by influences acting on the amygdala].

Science.gov (United States)

Isakova, L S; Danilov, G E; Egorkina, S B; Butolin, E G

1989-01-01

Changes in intraocular pressure, eye hydrodynamics and the amount of hypophyseal, thyroid, adrenal and pancreatic hormones were studied during continuous stimulation of amygdaloid complex or after administration of angiotensin II into the structure in rabbits. The effects involved changes in hormonal homeostasis and elevation of intraocular pressure due to a hypersecretion of intraocular fluid. The administration of angiotensin II during the amygdala stimulation enhanced the changes.

Intraocular lens fabrication

Energy Technology Data Exchange (ETDEWEB)

Salazar, M.A.; Foreman, L.R.

1997-07-08

This invention describes a method for fabricating an intraocular lens made from clear Teflon{trademark}, Mylar{trademark}, or other thermoplastic material having a thickness of about 0.025 millimeters. These plastic materials are thermoformable and biocompatable with the human eye. The two shaped lenses are bonded together with a variety of procedures which may include thermosetting and solvent based adhesives, laser and impulse welding, and ultrasonic bonding. The fill tube, which is used to inject a refractive filling material is formed with the lens so as not to damage the lens shape. A hypodermic tube may be included inside the fill tube. 13 figs.

MRI and intraocular tamponade media

Energy Technology Data Exchange (ETDEWEB)

Manfre, I. (Dept. of Neuroradiology, Inst. of Neurosurgery, Univ. of Catania (Italy)); Fabbri, G. (Dept. of Neuroradiology, Inst. of Neurosurgery, Univ. of Catania (Italy)); Avitabile, T. (Inst. of Ophthalmology, Univ. of Catania (Italy)); Biondi, P. (Inst. of Ophthalmology, Univ. of Catania (Italy)); Reibaldi, A. (Inst. of Ophthalmology, Univ. of Catania (Italy)); Pero, G. (Dept. of Neuroradiology, Inst. of Neurosurgery, Univ. of Catania (Italy))

1993-05-01

Thirteen patients who underwent surgery for retinal detachment and injection of intraocular tamponade media (silicone oil, flurosilicone oil, or perfluoro-carbon liquid) underwent magnetic resonance imaging (MRI), using spin-echo T1- and T2-weighted images. The ophthalmic tamponade media showed different signal intensity, according to their chemical structure. Unlike ophthalmoscopy or ultrasonography, MRI showed no oil-related artefact, making possible recognition of recurrent retinal detachment. (orig.)

MRI and intraocular tamponade media

International Nuclear Information System (INIS)

Manfre, I.; Fabbri, G.; Avitabile, T.; Biondi, P.; Reibaldi, A.; Pero, G.

1993-01-01

Thirteen patients who underwent surgery for retinal detachment and injection of intraocular tamponade media (silicone oil, flurosilicone oil, or perfluoro-carbon liquid) underwent magnetic resonance imaging (MRI), using spin-echo T1- and T2-weighted images. The ophthalmic tamponade media showed different signal intensity, according to their chemical structure. Unlike ophthalmoscopy or ultrasonography, MRI showed no oil-related artefact, making possible recognition of recurrent retinal detachment. (orig.)

Fratura tipo explosão da coluna torácica e lombar: correlação entre o segmento biomecânico sagital acometido e as alterações estruturais da vértebra fraturada

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Matheus Luís da Silva

2013-01-01

Full Text Available OBJETIVO: Analisar as fraturas tipo explosão da coluna torácica e lombar e fazer a correlação entre o segmento biomecânico sagital acometido e as alterações estruturais da vértebra fraturada. MÉTODOS: Estudo retrospectivo de 72 pacientes com fraturas tipo explosão da coluna torácica e lombar. O estreitamento do canal vertebral, o colapso vertebral e a cifose local foram avaliados em três segmentos distintos: torácico, transição toracolombar e lombar. RESULTADOS: Houve diferença estatística significativa (p < 0,05 dos valores do estreitamento do canal vertebral e cifose local nos diferentes segmentos da coluna vertebral avaliados. CONCLUSÃO: As fraturas tipo explosão da coluna torácica e lombar, embora apresentem características semelhantes, independentemente do local de ocorrência, sofrem influência direta do segmento biomecânico sagital no que diz respeito às alterações estruturais que ocorrem na vértebra fraturada.

Desarrollo de plan de marketing para elaboración y posicionamiento en el mercado de tarjeta con beneficios precargados

OpenAIRE

Faggliolini, Federico

2015-01-01

El desarrollo de una tarjeta con beneficios pre cargados para turistas que visitan la ciudad de Mar del Plata es un negocio atractivo e innovador que permite a todos sus actores beneficiarse. Por esta razón, el estudio de este negocio permitirá vislumbrar las ventajas del ingreso de inversionistas a este segmento del mercado. Por un lado, al momento de análisis, no hay existencia de competidores directos en este segmento, dado que no reúnen las características que brinda este producto/bene...

Central Corneal Thickness And Its Relationship To Intra-ocular And Epidemiological Determinants

International Nuclear Information System (INIS)

Tayyab, A.; Masrur, A.

2016-01-01

Objective: To measure central corneal thickness in Pakistani population and determine its relationship to intra-ocular pressure, age, gender and ethnicity. Study Design: Cross-sectional observation study. Place and Duration of Study: Pakistan Institute of Medical Sciences, Islamabad, Pakistan, between December 2013 and February 2015. Methodology: The right eyes of 1000 cases (496 males and 504 females) were recruited for this study. Inclusion criteria were Pashtun or Punjabi ethnicity, intra-ocular pressure < 22 mmHg, gonioscopically open angles, cup-disk-ratio < 0.5, and age matched normal visual fields. Cases with prior ocular surgery, contact lens use, corneal pathologies, myopia or hypermetropia > ±3.0 diopters, astigmatism of > ±1.0 diopters were excluded. Central corneal thickness was measured using a TopCon non-contact specular microscope. Intra-ocular pressure was measured using Goldmann applanation tonometer. Frequency distribution, test of significance, and regression analysis was carried out using Statistical Package for Social Sciences version 20.0. Result: Mean age was 47.31 ±11.78 years. Ethnic composition was 51.6 percentage (n=516) Pashtun and 48.4 percentage (n=484) Punjabi. The mean central corneal thickness was 503.96 (±12.47) meu m, while the mean intra-ocular pressure was 15.61 (±2.68) mmHg. Regression analysis showed a significant association between central corneal thickness and intra-ocular pressure (p=0.00) and age (p=0.00). A ±100 μ change in central corneal thickness was associated with change in IOP of ±3.30 mmHg, whereas central corneal thickness decreased by 0.12 meu m per year. No significant association could be established between central corneal thickness and ethnicity (p=0.19). Conclusion: Central corneal thickness of the studied races was comparable to non-Caucasians which affects intra-ocular pressure measurements, and decreases with increasing age. No relationship was observed between central corneal thickness and

Comparison of Bigbag and Rayner620H intraocular lens in cataract surgeries in high myopia patients

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Zhan-Jiang Liu

2016-01-01

Full Text Available AIM:To investigate the effects of Bigbag and Rayner620H intraocular lens in cataract surgeries in high myopia patients. METHODS:Seventy-seven patients(128 eyeswere treated by phacoemulsification combined with intraocular lens implantation from January 2014 to March 2015 in our hospital. Thirty-nine patients(65 eyeswere treated with Bigbag intraocular lens, 38 cases(63 eyeswere treated with Rayner620H. The best corrected visual acuity(BCVAdistribution, the actual refractive value, the difference between predictive refractive value and actual refractive value and complications were measured and recorded in the two groups at 1mo after surgeries. RESULTS:The difference between the two groups on BCVA are statistically significant(PWilcoxon rank sum test. The differences between predictive refractive value and actual refractive value of the two groups were statistically significant(PPCONCLUSION:The effect of Bigbag intraocular lens for patients with phacoemulsification and intraocular lens implantation is good, and it can reduce the risk of complications.

Evaluating the risk of eye injuries: intraocular pressure during high speed projectile impacts.

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Duma, Stefan M; Bisplinghoff, Jill A; Senge, Danielle M; McNally, Craig; Alphonse, Vanessa D

2012-01-01

To evaluate the risk of eye injuries by determining intraocular pressure during high speed projectile impacts. A pneumatic cannon was used to impact eyes with a variety of projectiles at multiple velocities. Intraocular pressure was measured with a small pressure sensor inserted through the optic nerve. A total of 36 tests were performed on 12 porcine eyes with a range of velocities between 6.2 m/s and 66.5 m/s. Projectiles selected for the test series included a 6.35  mm diameter metal ball, a 9.25  mm diameter aluminum rod, and an 11.16  mm diameter aluminum rod. Experiments were designed with velocities in the range of projectile consumer products such as toy guns. A range of intraocular pressures ranged between 2017 mmHg to 26,426 mmHg (39 psi-511 psi). Four of the 36 impacts resulted in globe rupture. Intraocular pressures dramatically above normal physiological pressure were observed for high speed projectile impacts. These pressure data provide critical insight to chronic ocular injuries and long-term complications such as glaucoma and cataracts.

Diagnóstico y control del astigmatismo en la cirugía del cristalino

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Yanay Ramos Pereira

Full Text Available Se realizó una revisión bibliográfica con el objetivo de conocer las opciones quirúrgicas para la corrección del astigmatismo preoperatorio y posoperatorio en la cirugía de catarata. Fueron abordados tópicos como los estudios preoperatorios detallados que nos permiten realizar una planificación quirúrgica personalizada, así como las diferentes soluciones quirúrgicas actuales, tanto las incisiones anastigmáticas en la facoemulsificación, como las incisiones relajantes limbares combinadas o no con las lentes intraoculares tóricas y los procederes con excímer láser. Se consultaron investigaciones que abarcan varios años hasta el presente para conocer los diferentes resultados de la utilización de estos procederes quirúrgicos hasta llegar a técnicas más novedosas en estudio como el láser femtosecond y las lentes intraoculares ajustables con la luz. Todo esto puede maximizar la corrección refractiva total y lograr en el paciente una óptima calidad visual y una mejor calidad de vida. La corrección refractiva total no es fácil de lograr; no obstante, es posible y debe ser la meta de cada cirujano de catarata.

Gobernar a través del espejo. neoliberalismo, gerencialismo y psicopolítica del control de la desviación

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Leonidas Cheliotis

2014-03-01

Full Text Available El objetivo de este artículo es realizar una contribución epistemológica y sustantiva al estudio de la punitividad. En términos epistemológicos, se reclama el recurso al psicoanálisis, en especial a la orientación "materialista" de Erich Fromm. En términos sustantivos, mediante la puesta en relación de la teoría psicoanalítica de Fromm con las perspectivas de Economía política del castigo contemporáneo, el objetivo es indagar los modos en los que la penalidad contribuye, en las condiciones del capitalismo neoliberal en EEUU y en el Reino Unido, al proyecto, más amplio, de dominación estatal sobre la población. La atención se centra, en particular, en el rol simbólico del control punitivo físico sobre los segmentos más débiles, a los efectos de lograr el apoyo de las clases medias a unos Estados que son incapaces de responder a las expectativas públicas en materia socioeconómica. Como se argumenta en el texto, este proceso se canaliza mediante la construcción y el empleo de la delincuencia urbana violenta como un peligro grave y creciente, pero también por medio de la referencia a los léxicos y operaciones del gerencialismo, que tradicionalmente se han teorizado como desapasionados y moralmente neutrales.

Implementación del sistema de venta de recarga virtual para distribuidores de una empresa de telecomunicaciones

OpenAIRE

Ibarra Apaza, Wilson Daniel; Ibarra Apaza, Wilson Daniel

2012-01-01

En la actualidad se ha observa que el Sector de las Telecomunicaciones ha ido creciendo notablemente, esto debido en parte al crecimiento económico del país en los últimos años, lo cual ha traído consigo oportunidades de negocio para las empresas de telecomunicaciones, quienes constantemente ofrecen productos y servicios de calidad enfocados a la satisfacción de los clientes, con la finalidad de retener a los clientes y atraer nuevos clientes de segmentos que aún no han sido explorados y que ...

Stability of Adrenaline in Irrigating Solution for Intraocular Surgery.

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Shibata, Yuuka; Kimura, Yasuhiro; Taogoshi, Takanori; Matsuo, Hiroaki; Kihira, Kenji

2016-01-01

Intraocular irrigating solution containing 1 µg/mL adrenaline is widely used during cataract surgery to maintain pupil dilation. Prepared intraocular irrigating solutions are recommended for use within 6 h. After the irrigating solution is admistered for dilution, the adrenaline may become oxidized, and this may result in a decrease in its biological activity. However, the stability of adrenaline in intraocular irrigating solution is not fully understood. The aim of this study was to evaluate the stability of adrenaline in clinically used irrigating solutions of varying pH. Six hours after mixing, the adrenaline percentages remaining were 90.6%±3.7 (pH 7.2), 91.1%±2.2 (pH 7.5), and 65.2%±2.8 (pH 8.0) of the initial concentration. One hour after mixing, the percentages remaining were 97.6%±2.0 (pH 7.2), 97.4%±2.7 (pH 7.5), and 95.6%±3.3 (pH 8.0). The degradation was especially remarkable and time dependent in the solution at pH 8.0. These results indicate that the concentration of adrenaline is decreased after preparation. Moreover, we investigated the influence of sodium bisulfite on adrenaline stability in irrigating solution. The percentage adrenaline remaining at 6 h after mixing in irrigating solution (pH 8.0) containing sodium bisulfite at 0.5 µg/mL (concentration in irrigating solution) or at 500 µg/mL (concentration in the undiluted adrenaline preparation) were 57.5 and 97.3%, respectively. Therefore, the low concentration of sodium bisulfite in the irrigating solution may be a cause of the adrenaline loss. In conclusion, intraocular irrigation solution with adrenaline should be prepared just prior to its use in surgery.

Experimental research on intraocular aqueous flow by PIV method.

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Yang, Hongyu; Song, Hongfang; Mei, Xi; Li, Lin; Fu, Xineng; Zhang, Mindi; Liu, Zhicheng

2013-10-21

Aqueous humor flows regularly from posterior chamber to anterior chamber, and this flow much involves intraocular pressure, the eye tissue nutrition and metabolism. To visualize and measure the intraocular flow regular pattern of aqueous humor. Intraocular flow in the vitro eyeball is driven to simulate the physiological aqueous humor flow, and the flow field is measured by Particle Image Velocimetry(PIV). Fluorescent particle solution of a certain concentration was infused into the root of Posterior Chamber(PC) of vitro rabbit eye to simulate the generation of aqueous and was drained out at a certain hydrostatic pressure from the angle of Anterior Chamber(AC) to represent the drainage of aqueous. PIV method was used to record and calculate the flow on the midsagittal plane of the eyeball. Velocity vector distribution in AC has been obtained, and the distribution shows symmetry feature to some extent. Fluorescent particle solution first fills the PC as it is continuously infused, then surges into AC through the pupil, flows upwards toward the central cornea, reflecting and scattering, and eventually converges along the inner cornea surface towards the outflow points at the periphery of the eyeball. Velocity values around the pupillary margin are within the range of 0.008-0.012 m/s, which are close to theoretical values of 0.0133 m/s, under the driving rate of 100 μl/min. Flow field of aqueous humor can be measured by PIV method, which makes it possible to study the aqueous humor dynamics by experimental method. Our study provides a basis for experimental research on aqueous humor flow; further, it possibly helps to diagnose and treat eye diseases as shear force damage of ocular tissues and destructions on corneal endothelial cells from the point of intraocular flow field.

Retropupillary iris claw intraocular lens implantation in aphakia for dislocated intraocular lens

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Faria MY

2016-08-01

Full Text Available Mun Yueh Faria,1–3 Nuno Pinto Ferreira,1–3 Joana Medeiros Pinto,1–3 David Cordeiro Sousa,1–3 Ines Leal,1–3 Eliana Neto,1–3 Carlos Marques-Neves1–3 1Centro de Estudos da Visão, Universidade de Lisboa, 2Department of Ophthalmology, Hospital de Santa Maria, 3Faculty of Medicine, University of Lisbon, Lisbon, Portugal Background: Nowadays, dislocated intraocular lenses (IOLs and inadequate capsular support are becoming a challenge for every ophthalmic surgeon. Explantation of dislocated IOL and iris claw IOL (ICIOL are the techniques that have been used in our ophthalmic department. The aim of this study is to report our technique for retropupillar ICIOL.Methods: This study is a retrospective case series. A total of 105 eyes with dislocated IOL from the patients at the Department of Ophthalmology in Santa Maria Hospital, a tertiary reference hospital in Lisbon, Portugal, from January 2012 until January 2016, had been analyzed. Of these 105 eyes, 66 eyes had dislocated one-piece IOL and 39 eyes had dislocated three-piece IOL. The latter underwent iris suture of the same IOL and were excluded from this study. The remaining 66 eyes with dislocated one-piece IOL underwent pars plana vitrectomy, that is, explantation of dislocated IOL through corneal incision and an implantation of retropupillary ICIOL. Operative data and postoperative outcomes included best corrected visual acuity, IOL position, intraocular pressure, pigment dispersion, clinical signs of endothelial cell loss, and anterior chamber depth.Results: The mean follow-up was 23 months (range: 6–48 months. The mean preoperative best corrected visual acuity was 1.260±0.771 logMAR, and postoperative best corrected visual acuity was 0.352±0.400 logMAR units. Mean vision gain was 0.909 logMar units. The patients had the following complications: 1 retinal detachment was found in one patient, 2 corneal edema was found in three patients, 3 high intraocular pressure was observed in

Intraocular robotic interventional surgical system (IRISS): Mechanical design, evaluation, and master-slave manipulation.

Science.gov (United States)

Wilson, Jason T; Gerber, Matthew J; Prince, Stephen W; Chen, Cheng-Wei; Schwartz, Steven D; Hubschman, Jean-Pierre; Tsao, Tsu-Chin

2018-02-01

Since the advent of robotic-assisted surgery, the value of using robotic systems to assist in surgical procedures has been repeatedly demonstrated. However, existing technologies are unable to perform complete, multi-step procedures from start to finish. Many intraocular surgical steps continue to be manually performed. An intraocular robotic interventional surgical system (IRISS) capable of performing various intraocular surgical procedures was designed, fabricated, and evaluated. Methods were developed to evaluate the performance of the remote centers of motion (RCMs) using a stereo-camera setup and to assess the accuracy and precision of positioning the tool tip using an optical coherence tomography (OCT) system. The IRISS can simultaneously manipulate multiple surgical instruments, change between mounted tools using an onboard tool-change mechanism, and visualize the otherwise invisible RCMs to facilitate alignment of the RCM to the surgical incision. The accuracy of positioning the tool tip was measured to be 0.205±0.003 mm. The IRISS was evaluated by trained surgeons in a remote surgical theatre using post-mortem pig eyes and shown to be effective in completing many key steps in a variety of intraocular surgical procedures as well as being capable of performing an entire cataract extraction from start to finish. The IRISS represents a necessary step towards fully automated intraocular surgery and demonstrated accurate and precise master-slave manipulation for cataract removal and-through visual feedback-retinal vein cannulation. Copyright © 2017 John Wiley & Sons, Ltd.

Effects of phacoemulsification combined with intraocular lens implantation on ocular surface

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Ming Li

2013-10-01

Full Text Available AIM: To explore the changes of ocular surface after phacoemulsification combined with intraocular lens implantation. METHODS: Totally 78 cases of 78 eyes with age-related cataract were collected from August 2011 to October 2012, and they underwent corneal incision phacoemulsification combined with intraocular lens implantation. The score of dry eye symptoms; tear breakup time(BUT; Schirmer Ⅰ test(SⅠtand corneal fluorescein staining were observed and recorded in 3 days before, 1 day, 1 week, 1 month, 3 and 6 months after surgery respectively. The results were analyzed statistically. RESULTS: All the subjects complained of dry eye within 1 week after surgery. Compared with 3 days before the surgery, the corneal fluorescein staining increased and the amount of tear secretion reduced statistically significant in 1 day, 1 week and 1 month(PPP>0.05, and lasted to 3 months later. CONCLUSION: Phacoemulsification combined with intraocular lens implantation has obvious effect on the ocular surface to some extent. Preventions and treatment should be taken clinically.

The Visual Effects of Intraocular Colored Filters

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Billy R. Hammond

2012-01-01

Full Text Available Modern life is associated with a myriad of visual problems, most notably refractive conditions such as myopia. Human ingenuity has addressed such problems using strategies such as spectacle lenses or surgical correction. There are other visual problems, however, that have been present throughout our evolutionary history and are not as easily solved by simply correcting refractive error. These problems include issues like glare disability and discomfort arising from intraocular scatter, photostress with the associated transient loss in vision that arises from short intense light exposures, or the ability to see objects in the distance through a veil of atmospheric haze. One likely biological solution to these more long-standing problems has been the use of colored intraocular filters. Many species, especially diurnal, incorporate chromophores from numerous sources (e.g., often plant pigments called carotenoids into ocular tissues to improve visual performance outdoors. This review summarizes information on the utility of such filters focusing on chromatic filtering by humans.

Comparison of hydrophobic and hydrophilic intraocular lens in preventing posterior capsule opacification after cataract surgery

Science.gov (United States)

Zhao, Yang; Yang, Ke; Li, Jiaxin; Huang, Yang; Zhu, Siquan

2017-01-01

Abstract Background: Posterior capsular opacification (PCO) is a common long-term complication of cataract surgery. Intraocular lens design and material have been implicated in influencing the development of PCO. This study evaluated the association of hydrophobic and hydrophilic intraocular lenses on preventing PCO. Methods: Medline, Cochrane, EMBASE, and Google Scholar databases were searched until August 3, 2016, using the following search terms: cataract, posterior capsule opacification, and intraocular lens. Eligible studies included randomized controlled trials (RCTs), retrospective, and cohort studies. Results: Eleven studies were included in the study with a total of 889 eyes/patients. The overall analysis revealed that hydrophobic intraocular lenses were associated with lower Nd:YAG laser capsulotomy rates than hydrophilic lenses [odds ratio (OR) = 0.38, 95% confidence interval (95% CI) = 0.16–0.91, P = .029]. Hydrophobic intraocular lenses were also associated with lower subjective PCO score (diff. in means: −1.32, 95% CI = −2.39 to −0.25, P = .015) and estimated PCO score (diff. in means: −2.23; 95% CI, −3.80 to −0.68, P = .005) as compared with hydrophilic lenses. Objective PCO score was similar between lens types. (diff. in means: −0.075; 95% CI, −0.18 to 0.035; P = .182). Pooled analysis found that visual acuity was similar between hydrophobic and hydrophilic intraocular lenses (diff. in means: −0.016; 95% CI, −0.041 to 0.009, P = .208). Conclusion: In general, PCO scores and the rate of Nd:YAG laser capsulotomy were influenced by intraocular lens biomaterial. Lens made of hydrophobic biomaterial were overall superior in lowering the PCO score and the Nd:YAG laser capsulotomy rate, but not visual acuity. PMID:29095259

Latanoprost ophthalmic solution in the treatment of open angle glaucoma or raised intraocular pressure: a review

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Andrea Russo

2009-01-01

Full Text Available Andrea Russo, Ivano Riva, Teodoro Pizzolante, Federico Noto, Luciano QuarantaCattedra di Malattie dell’Apparato Visivo, Università degli studi di Brescia, USVD “Centro per lo studio del Glaucoma” Spedali Civili di BresciaAbstract: Latanoprost is a prostaglandin F2-alpha isopropyl ester prodrug which is rapidly hydrolyzed by esterases in the cornea to the biologically active latanoprost acid. When latanoprost is topically administered into the eye, the cornea seems to act like as a slow-release depot to the anterior segment. One hour after administration maximum concentration is found in the iris, followed by the anterior chamber and the ciliary body. Despite extensive research, controversy remains about the real mechanism of action of this drug. Immunohistochemical data have shown that the intraocular pressure (IOP reduction with topical prostaglandin F2-alpha is associated with a reduction of collagens within the uveoscleral outflow pathway. Evidence from several experimental and clinical studies suggests that latanoprost is a valuable addition first-line treatment alternatives for glaucoma, ocular hypertension and even angle-closure glaucoma. Strong points are its efficacy, which is demonstrated to be higher than that of brimonidine, dorzolamide and timolol with fewer systemic adverse effects; a convenient administration schedule; and the IOP-controlling pattern, which is relatively flat compared with timolol and dorzolamide, and enables better control in glaucoma progression, since large fluctuations may be associated with the risk of developing glaucoma in untreated ocular hypertensive subjects.Keywords: latanoprost, intraocular pressure, glaucoma, ocular hypertension

Evaluation of intraocular pressure according to corneal thickness before and after excimer laser corneal ablation for myopia.

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Hamed-Azzam, Shirin; Briscoe, Daniel; Tomkins, Oren; Shehedeh-Mashor, Raneen; Garzozi, Hanna

2013-08-01

Intraocular pressure is affected by corneal thickness and biomechanics. Following ablative corneal refractive surgery, corneal structural changes occur. The purpose of the study is to determine the relationship between the mean central corneal thickness (CCT) and the change in intraocular pressure measurements following various corneal ablation techniques, using different measurement methods. Two hundred myopic eyes undergoing laser in situ keratomileusis (LASIK) or photorefractive keratectomy (PRK) were enrolled into a prospective, non-randomized study. Corneal parameters examined included full ocular examination, measurement of CCT, corneal topography, corneal curvature and ocular refractivity. Intraocular pressure measurements were obtained using three different instruments-non-contact tonometer, Goldmann applanation tonometer and TonoPen XL (TonoPen-Central and TonoPen-Peripheral). All measurements were performed pre-operatively and 4 months post-operatively. Post-operative intraocular pressure was significantly lower than pre-operative values, with all instruments (p value tonometer and non-contact tonometer (p value < 0.001, ANOVA). Intraocular pressure readings are significantly reduced following corneal ablation surgery. We determined in our myopic patient cohort that the TonoPen XL intraocular pressure measurement method is the least affected following PRK and LASIK as compared to other techniques.

Desafios da radiodifusão sonora na convergência multimídia: o segmento musical jovem

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Luiz Artur Ferraretto; UCS/RS

2008-01-01

Este texto faz uma reflexão sobre as origens, o desenvolvimento e as perspectivas do segmento musical jovem nas emissoras de rádio. Parte do papel histórico do veículo na constituição, de início, da categoria social representada pela juventude e, na seqüência, no tratamento desse como público consumidor. Chega-se, assim, ao momento atual, um cenário de multiplicidade de ofertas marcada pela presença da internet e...

Estratégias de precificação em pequenas empresas do segmento comercial

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Göller, Tamires Kryszczun

2015-01-01

O presente estudo visa analisar os principais métodos para formação de preços com ênfase no segmento comercial, norteada por um estudo de caso de uma loja comercial. A formação do preço de venda pode definir a lucratividade desejada pelos proprietários, mas isso não é um processo simples, pois existem diversas formas de precificação, as que são baseadas em custos (mark-up); concorrência e valor percebido pelo cliente. A precificação baseada em custos considera os elementos que compõem o custo...

Clinical assessment of diclofenac sodium eye drops in toric intraocular lens implantation

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Yan Luo

2013-05-01

Full Text Available AIM:To evaluate the application of diclofenac sodium eye drops in toric intraocular lens implantation. METHODS: From January 2011 to February 2012, 38 eyes of 37 patients, who underwent toric intraocular lens implantation in this hospital, were randomly divided into diclofenac sodium eye drops group(trial groupand control group. Patient's degree of cooperation during surgery and inflammation postoperation after 1 day, 3,7, days, 1 month and 3 months were evaluated. RESULTS: Patient's degree of cooperation during surgery in the trial group(1.53±0.62was significantly better than in the control group(2.40±0.88, P<0.05. Inflammation reaction was gentle in the trial group 1 day postoperatively. CONCLUSION: Diclofenac sodium eye drops used during toric intraocular lens implantation can obviously alleviate eye irritation, and increase the cooperation of patients.

The role of pili in Bacillus cereus intraocular infection.

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Callegan, Michelle C; Parkunan, Salai Madhumathi; Randall, C Blake; Coburn, Phillip S; Miller, Frederick C; LaGrow, Austin L; Astley, Roger A; Land, Craig; Oh, So-Young; Schneewind, Olaf

2017-06-01

Bacterial endophthalmitis is a potentially blinding intraocular infection. The bacterium Bacillus cereus causes a devastating form of this disease which progresses rapidly, resulting in significant inflammation and loss of vision within a few days. The outer surface of B. cereus incites the intraocular inflammatory response, likely through interactions with innate immune receptors such as TLRs. This study analyzed the role of B. cereus pili, adhesion appendages located on the bacterial surface, in experimental endophthalmitis. To test the hypothesis that the presence of pili contributed to intraocular inflammation and virulence, we analyzed the progress of experimental endophthalmitis in mouse eyes infected with wild type B. cereus (ATCC 14579) or its isogenic pilus-deficient mutant (ΔbcpA-srtD-bcpB or ΔPil). One hundred CFU were injected into the mid-vitreous of one eye of each mouse. Infections were analyzed by quantifying intraocular bacilli and retinal function loss, and by histology from 0 to 12 h postinfection. In vitro growth and hemolytic phenotypes of the infecting strains were also compared. There was no difference in hemolytic activity (1:8 titer), motility, or in vitro growth (p > 0.05, every 2 h, 0-18 h) between wild type B. cereus and the ΔPil mutant. However, infected eyes contained greater numbers of wild type B. cereus than ΔPil during the infection course (p ≤ 0.05, 3-12 h). Eyes infected with wild type B. cereus experienced greater losses in retinal function than eyes infected with the ΔPil mutant, but the differences were not always significant. Eyes infected with ΔPil or wild type B. cereus achieved similar degrees of severe inflammation. The results indicated that the intraocular growth of pilus-deficient B. cereus may have been better controlled, leading to a trend of greater retinal function in eyes infected with the pilus-deficient strain. Although this difference was not enough to significantly alter the severity

La educación superior como eje del desarrollo

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Benjamín Afanador Vargas

2003-11-01

Full Text Available Este documento analiza cómo ha sido la interacción entre la política educativa y las estrategiasde desarrollo en Colombia, a lo largo del siglo XX. Se presenta una revisión del estadoactual de la educación en Colombia, tanto a nivel de educación básica y media, como de laeducación superior. Para ello se toman tres criterios básicos que son la cobertura, la calidady la equidad en el acceso a la educación. Para el caso de la educación superior, se comparala oferta de cupos con la demanda existente, se clasifican los distintos segmentos en que sedivide la educación superior y se hace una breve reseña sobre el recurso humano con que secuenta en la educación superior colombiana. Así mismo, se expone una conceptualización delos retos que enfrenta la educación superior, sobretodo para lograr una cohesión de la sociedad,evitando que algunos de sus integrantes sean excluidos y permitiendo que todos losestamentos de la sociedad puedan compartir los mismos ideales y los consideren asequibles.Finalmente, se presentan unas conclusiones que se derivan del estudio y se proponen algunasrecomendaciones de política .

Correlação entre instabilidade radiográfica e presença do sinal de modic Correlacíon entre la instabilidad radiológica y la presencia de modic Correlation between radiographic instability and modic's signal

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Leandro Medeiros da Costa

2011-01-01

Full Text Available OBJETIVOS: Este artigo tem por objetivo avaliar a presença de alterações do platô vertebral (Modic e a sua associação com a instabilidade demonstrada nas radiografias em flexo-extensão e neutra no plano sagital. MÉTODOS: Análise seccional dos estudos de imagens realizados no serviço de radiologia do Hospital Mãe de Deus em Porto Alegre (RS, entre o período de julho de 2008 e fevereiro de 2010, em 115 pacientes. Foram analisados os segmentos de L1 a S1, num total de 575 segmentos nos exames radiográficos e de ressonância nuclear magnética. RESULTADOS: Analisou-se 115 pacientes sendo 59 (51,30% do sexo feminino e 56 (48,70% do sexo masculino. A idade variou de 13 anos e seis meses a 81 anos e dois meses com uma média de 43 anos e oito meses. Com os critérios utilizados, observou-se 224 segmentos instáveis e 351 segmentos estáveis. O Modic I apresentou-se em sete segmentos instáveis e em 22 segmentos estáveis. Quanto à prevalência, o segmento L4-L5 foi o mais instável, correspondendo por 32,58% de todos os segmentos instáveis. CONCLUSÃO: Este artigo refuta a idéia de que as alterações de Modic tipo I estejam associadas a segmentos instáveis.OBJETIVO: este artículo tiene el objetivo de evaluar la presencia de alteraciones Modic y de su asociación con la inestabilidad demostrada en las radiografías en la flexoextensión y neutra. Métodos - Análisis seccional de los estudios de las imágenes de resonancia y radiográficas de 115 pacientes del servicio de radiología del Hospital Mãe de Deus en Porto Alegre (RS, incorpora en el período de julio de 2008 a febrero de 2010. Los segmentos de L1 hasta la S1 habían sido analizados, en un total de 575 segmentos. RESULTADOS: El artículo analizó a 115 pacientes que eran 59 (51.30% del sexo femenino y 56 (48.70% del sexo masculino. La edad varió de 13 años y 06 meses hasta los 81 años y 02 meses con un promedio de 43 años y de 08 meses. Con los criterios usados, se

Locally Advanced Basal Cell Carcinoma with Intraocular Invasion

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Georgi Tchernev

2018-01-01

Full Text Available We present a 103 - year - old patient, with duration of complaints of about ten years. The initial complaint had been presented as a small nodule, located on the eyebrow, which subsequently ulcerated and encompassed larger regions of the upper and lower eyelids. For the past three years, the patient also had complaints of a worsening of his vision, without seeking for medical help. Within the dermatological examination, an intraocular and periocular localised tumour was established, characterised by a raised peripheral edge and central ulceration. More careful examination revealed that the bulb was fully consumed. The patient refused further diagnosis and treatment. Advanced basal cell carcinomas with intraocular invasion are rare in general. If the patient refuses surgery, radiotherapy and systemic therapy with modern medications such as Vismodegib or Sonidegib are available as treatment options.

Intraocular eyelashes and iris cyst in anterior chamber following penetrating eye injury: a case report

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Sahu S

2017-03-01

Full Text Available Sabin Sahu,1 Lila Raj Puri,1 Sanjay Kumar Singh2 1Department of Ophthalmology, Sagarmatha Choudhary Eye Hospital, Lahan, Siraha, 2Department of Ophthalmology, Biratnagar Eye Hospital, Biratnagar, Nepal Background: The presence of intraocular eyelashes following penetrating eye injury or ocular surgery is relatively uncommon. The response of the eye to intraocular eyelashes is variable. The eyelash may be symptomatic or may remain asymptomatic for long periods. Objective: We report a case with two intraocular eyelashes and an iris cyst after 2 years of asymptomatic period following penetrating eye injury. Case presentation: A 24-year-old male presented with decreased vision in the left eye which he had noticed for the previous 2 weeks. His visual acuity was 6/6 in the right eye and 6/18 in the left eye, improving to 6/9 with -2.5 DC × 140° correction. The intraocular pressure was 12 mmHg in both eyes. On slit-lamp examination, the left eye showed 8 mm linear peripheral corneal opacity nasally, two eyelashes in the superior anterior chamber, and an iris cyst measuring 4 mm × 4 mm in the superior iris. The right eye was normal. Dilated fundus examination of both eyes was normal. The eyelashes and cyst were removed surgically. There were no complications during the 3-month follow-up period. Conclusion: Intraocular implantation of eyelashes following penetrating eye injury can remain asymptomatic for long periods; however, late development of iris cyst may occur. Keywords: intraocular eyelashes, iris cyst, penetrating eye injury

O MERCADO DE FRANQUIAS E PEQUENAS EMPRESAS: UM ESTUDO SOBRE O SEGMENTO CAFETERIA

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Ernani Cesar de Freitas

2008-01-01

Full Text Available O presente artigo tem como objetivo identificar fatores que influenciam o empreendedor em optar por uma franquia ou por um negócio independente no ramo de cafeteria, demonstrando as possíveis vantagens e desvantagens do sistema de franchising nesse segmento. A pesquisa descritiva realizou-se através de questionários estruturados, aplicados a franqueadores e a franqueados integrantes do sistema franchising de cafeteria no Brasil. Os resultados obtidos na pesquisa demonstram que existem diversos motivos que podem influenciar o empreendedor na escolha desse tipo de negócio; existem vantagens e desvantagens que devem ser avaliadas adequadamente para subsidiar a tomada de decisão do empreendedor. Palavras-chave: Franquias. Franchising. Empreendedor. Cafeteria.

Lentes intraoculares fácicas de câmara posterior

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Mara Barreto Theiss

Full Text Available Resumo O objetivo deste artigo foi reunir estudos que reportam resultados disponíveis na literatura científica, considerando a previsibilidade, segurança, eficácia, e estabilidade das lentes intraoculares fácicas de câmara posterior. E relatar as complicações documentadas para estas lentes. A revisão criteriosa dos estudos publicados na literatura ate o momento revelam resultado satisfatórios quanto à eficácia, elevada previsibilidade, estabilidade e segurança do implante de lente intraocular de câmara posterior, para correção das miopia, hipermetropia e astigmatismo.

MicroRNA profiling in intraocular medulloepitheliomas.

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Deepak P Edward

Full Text Available To study the differential expression of microRNA (miRNA profiles between intraocular medulloepithelioma (ME and normal control tissue (CT.Total RNA was extracted from formalin fixed paraffin embedded (FFPE intraocular ME (n=7 and from age matched ciliary body controls (n=8. The clinical history and phenotype was recorded. MiRNA profiles were determined using the Affymetrix GeneChip miRNA Arrays analyzed using expression console 1.3 software. Validation of significantly dysregulated miRNA was confirmed by quantitative real-time PCR. The web-based DNA Intelligent Analysis (DIANA-miRPath v2.0 was used to perform enrichment analysis of differentially expressed (DE miRNA gene targets in Kyoto Encyclopedia of Genes and Genomes (KEGG pathway.The pathologic evaluation revealed one benign (benign non-teratoid, n=1 and six malignant tumors (malignant teratoid, n=2; malignant non-teratoid, n = 4. A total of 88 miRNAs were upregulated and 43 miRNAs were downregulated significantly (P<0.05 in the tumor specimens. Many of these significantly dysregulated miRNAs were known to play various roles in carcinogenesis and tumor behavior. RT-PCR validated three significantly upregulated miRNAs and three significantly downregulated miRNAs namely miR-217, miR-216a, miR-216b, miR-146a, miR-509-3p and miR-211. Many DE miRNAs that were significant in ME tumors showed dysregulation in retinoblastoma, glioblastoma, and precursor, normal and reactive human cartilage. Enriched pathway analysis suggested a significant association of upregulated miRNAs with 15 pathways involved in prion disease and several types of cancer. The pathways involving significantly downregulated miRNAs included the toll-like receptor (TLR (p<4.36E-16 and Nuclear Factor kappa B (NF-κB signaling pathways (p<9.00E-06.We report significantly dysregulated miRNAs in intraocular ME tumors, which exhibited abnormal profiles in other cancers as well such as retinoblastoma and glioblastoma. Pathway analysis

Biomicroscopia ultrasónica en pacientes operados de catarata traumática Ultrasound biomicroscopy used in patients operated from trauma cataract

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Yanay Ramos Pereira

2009-06-01

Full Text Available OBJETIVO: Caracterizar a los pacientes operados de catarata traumática mediante su evaluación con biomicroscopia ultrasónica. MÉTODOS: Se realizó un estudio observacional, descriptivo, longitudinal y prospectivo en el servicio de microcirugía del Instituto Cubano de Oftalmología "Ramón Pando Ferrer", en el período comprendido entre enero de 2006 a enero de 2007. La muestra la conformaron 72 pacientes quienes recibieron tratamiento quirúrgico por diferentes técnicas con implante de lente intraocular. RESULTADOS: El 72,2 % fueron del sexo masculino y prevaleció el grupo de edad entre 40 y 49 años. La subluxación del cristalino estuvo presente en el 16,7 %. El 68,1 % presentó una amplitud de la cámara anterior normal independientemente del tipo de trauma. Los hallazgos más frecuentes por Biomicroscopía Ultrasónica fueron: el leucoma corneal, la desinserción zonular y la ruptura de cápsula posterior. Presentaron el mayor porcentaje de buena agudeza visual con corrección posoperatoria y sin ella los pacientes con lente intraocular en saco, localización más frecuente por biomicroscopia ultrasónica. Predominó la ruptura de las fibras zonulares por temporal. CONCLUSIONES: La biomicroscopia ultrasónica (BMU es un medio diagnóstico de gran importancia para la detección de alteraciones del segmento anterior en pacientes operados de catarata traumática.OBJECTIVE: To characterize the patients operated from trauma cataract through their evaluation with ultrasound biomicroscopy. METHODS: A longitudinal, prospective, observational and descriptive study was conducted in the Microsurgery Service of "Ramón Pando Ferrer" Cuban Institute of Ophthalmology from January 2006 to January 2007. The sample was made up of 72 patients who had been surgically treated using different techniques for intraocular lens implant. RESULTS: Male sex was 72.2 % and the prevailing age group was 40 to 49 years. Crystalline subluxation was found in 16.7 % of

Evaluación del impacto de las Microfinanzas sobre los ingresos y la generación de empleo en Colombia

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Jhon Alexander Méndez Sayago

2011-12-01

Full Text Available El artículo evalúa la capacidad de las herramientas microfinancieras para impulsar el mejoramiento de ingresos de las pequeñas y medianas unidades productivas en Colombia, así como la creación de puestos de trabajo en este segmento empresarial. Para tal cometido, se efectúa una estimación de los impactos del crédito formal, de cualquier tipo de crédito, y del crédito otorgado por la participación en programas de apoyo empresarial como FOMIPYME. Las técnicas para la estimación de los impactos de los tratamientos (microcrédito comprendieron: i los estimadores Matching no paramétricos del vecino más cercano y Kernel; ii el estimador de variables instrumentales; y iii el estimador del efecto local promedio del tratamiento (LATE. En todas las mediciones de los efectos del tratamiento se aceptó la hipótesis nula de que el microcrédito no tiene impacto positivo sobre las ganancias y la generación de empleo de las Micro, Medianas y Pequeñas Empresas

Uso de la técnica SSCP para detectar mutaciones puntuales del ADN mitocondrial humano

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Alejandro Estrada-Cuzcano

2013-05-01

Full Text Available En el presente trabajo se evalúa la técnica de SSCP (polimorfismo de conformación de cadena individual de ADN para detectar mutaciones puntuales, tanto por su sensibilidad en la detección (alrededor 80% en condiciones ideales, como por su implementación fácil y económica. Se utilizaron como controles positivos y negativos, ADN de voluntarios caracterizados previamente para las mutaciones puntuales de 5 RFLPs mitocondriales. Para la optimización de la prueba fueron ensayadas concentraciones variables del tampón TBE (1X y 0,5X y del glicerol (10%, 5% y 0 en geles de poliacrilamida. Cuatro de los 5 RFLPs fueron detectados en las condiciones utilizadas y pueden ser usados en estudios de rutina sin usar enzimas de restricción. Además, la técnica SSCP permitió determinar mutaciones desconocidas en un segmento de 394 nucleótidos de la región hipervariable (HVI del ADNmt. Diferencias en correspondencia a los distintos haplotipos fueron detectados e incluso permitió discernir grupos dentro del mismo subtipo. La secuenciación de dos muestras del subtipo B1 con migración diferencial en SSCP, corroboró la existencia de siete nucleótidos distintos

Influence of gross saponins from tribulus terrestris L on SOD activity and MDA content for chronic high intraocular pressure in rabbit

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Nuo Li

2013-05-01

Full Text Available AIM:To observe influence of gross saponins from tribulus terrestris L(GSTTon SOD activity and MDA content for chronic high intraocular pressure in rabbit, and discusses the retina oxidative damage inhibition on chronic high intraocular pressure model of rabbit. METHODS:Totally 24 healthy New Zealand rabbits were randomly divided into 4 groups: normal control group(A group; high intraocular pressure model blank group(B group; high intraocular pressure model with GSTT treated group(C group; high intraocular pressure model with Erigeron brevicapas hand mass(EBHMtreated group(D group. High intraocular pressure model was induced by 20g/L methylcellulose injection into the anterior chamber in B group, C group and D group. D group was injected 5 mg/kg GSTT and C group was injected 4.5mg/kg EBHM and measured intraocular pressure with Schiotz tonometer every day for 4 weeks. The retina tissue superoxide dismutase(SODand maleic dialdehyde(MDAcontent were detected 28 days later. RESULTS: After glaucoma model of rabbit eyes were established, the intraocular pressure during observation period was maintained in 32-39mmHg; High intraocular pressure model blank group and normal control group, EBHM treatment group, GSTT treatment group were compared, the differences of retina MDA, SOD content had statistical significance(P0.05; EBHM treatment group, GSTT treatment group and normal control group were compared, the content of MDA in the retina was still slightly higher(P<0.05, the content of SOD slightly lower(P<0.05 CONCLUSION: GSTT can effectively improve the retina SOD activity of chronic high intraocular pressure in rabbit and reduce the content of MDA, which has a protective effect of persistent high intraocular retinal oxidative stress.

Acute Central Retinal Artery Occlusion Associated with Intraocular Silicone Oil Tamponade

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Mehmet Yasin Teke

2012-05-01

Full Text Available Many systemic and ocular factors may cause acute central retinal artery occlusion (CRAO. Herein, we aimed to describe a case of CRAO due to intraocular silicone oil (SO tamponade. To the best of our knowledge, a case like our has not been reported previously. A 58-yearold male patient had undergone combined pars plana vitrectomy-lensectomy and intraocular SO for lens luxation and vitreus hemorrhage associated with a blunt ocular trauma in his right eye. Two weeks after the surgery, he presented with acute vision loss in the same eye. He was diagnosed with acute CRAO and it should be related with mechanical press or raised intraocular pressure (IOP associated with SO. He was treated by partial removal of SO immediately. In spite of the regression of retina edema, his visual acuity did not improve due to optic atrophy. SO may cause CRAO due to raised IOP and/or its mechanical pressure and this complication must be kept in mind. (Turk J Oph thal mol 2012; 42: 238-40

Advanced pigment dispersion glaucoma secondary to phakic intraocular collamer lens implant.

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Ye, Clara; Patel, Cajal K; Momont, Anna C; Liu, Yao

2018-06-01

We report a case of pigment dispersion glaucoma secondary to uncomplicated phakic intraocular collamer lens (ICL) (Visian ICL™, Staar Inc., Monrovia, CA) implant that resulted in advanced visual field loss. A 50-year-old man presented for routine follow-up status post bilateral phakic intraocular collamer lens (ICL) placement 8 years earlier. He was incidentally found to have a decline in visual acuity from an anterior subcapsular cataract and elevated intraocular pressure (IOP) in the left eye. There were signs of pigment dispersion and no evidence of angle closure. Diffuse optic nerve thinning was consistent with advanced glaucomatous visual field defects. Pigment dispersion was also present in the patient's right eye, but without elevated IOP or visual field defects. The patient was treated with topical glaucoma medications and the phakic ICL in the left eye was removed concurrently with cataract surgery to prevent further visual field loss. Pigment dispersion glaucoma is a serious adverse outcome after phakic ICL implantation and regular post-operative monitoring may prevent advanced visual field loss.

Effect of aspherical and yellow tinted intraocular lens on blue-on-yellow perimetry Efeito das lentes intraoculares asféricas e com pigmentação amarela na campimetria azul-amarelo

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Rodrigo França de Espíndola

2012-10-01

Full Text Available PURPOSE: To investigate the possible effect of aspherical or yellow tinted intraocular lens (IOL on contrast sensitivity and blue-on-yellow perimetry. METHODS: This prospective randomized bilateral double-masked clinical study included 52 patients with visually significant bilateral cataracts divided in two groups; 25 patients (50 eyes received aspherical intraocular lens in one eye and spherical intraocular lens in the fellow eye; and 27 patients (54 eyes received ultraviolet and blue light filter (yellow tinted IOL implantation in one eye and acrylic ultraviolet filter IOL in the fellow eye. The primary outcome measures were contrast sensitivity and blue-on-yellow perimetry values (mean deviation [MD] and pattern standard deviation [PSD] investigated two years after surgery. The results were compared intra-individually. RESULTS: There was a statistically significant between-group (aspherical and spherical intraocular lens difference in contrast sensitivity under photopic conditions at 12 cycles per degree and under mesopic conditions at all spatial frequencies. There were no between-group significant differences (yellow tinted and clear intraocular lens under photopic or mesopic conditions. There was no statistically significant difference between all intraocular lens in MD or PSD. CONCLUSION: Contrast sensitivity was better under mesopic conditions with aspherical intraocular lens. Blue-on-yellow perimetry did not appear to be affected by aspherical or yellow tinted intraocular lens. Further studies with a larger sample should be carried out to confirm or not that hypotheses.OBJETIVO: Investigar a possibilidade de efeitos na sensibilidade ao contraste e nos resultados da campimetria azul-amarelo com implante de uma lente intraocular (LIO asférica ou de pigmentação amarela. MÉTODOS: Trata-se de um estudo prospectivo, randomizado, duplo-mascarado, envolvendo 52 pacientes portadores de catarata senil bilateral, divididos em dois grupos; 25

La cadena productiva de pesca artesanal en Arraial de Cabo: Análisis y propuestas de mejoramiento

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Fabricio Molica de Mendonça

2011-01-01

Full Text Available El presente documento muestra los resultados de la investigacion que tuvo como objetivo analizar la cadena productiva de pesca del municipio de Arraial de Cabo (Rio de Janeiro, Brasil, compuesta por cinco segmentos: proveedores, produccion, transformacion, distribucion y consumo. Fueron identificados puntos de estrangulamiento en esos segmentos que pueden estar perjudicando la actividad y se sugieren propuestas de mejora. La estructura organizacional esta fragmentada, presentando distanciamiento entre produccion y consumo, lo que facilita la entrada de intermediarios, que retienen gran parte del lucro. Es necesaria la reorganizacion de la cadena, para que se puedan reducir costos, mejorar la calidad del pescado, fortalecer el sector y mejorar la calidad de vida del pescador.

Ocular Onchocerciasis in the Yanomami Communities from Brazilian Amazon: Effects on Intraocular Pressure

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Herzog-Neto, Guilherme; Jaegger, Karen; do Nascimento, Erika S.; Marchon-Silva, Verônica; Banic, Dalma M.; Maia-Herzog, Marilza

2014-01-01

To determine the influence of onchocercal eye disease on the intraocular pressure of the Yanomami Tribe Aratha-ú of Roraima State, Brazil, considered endemic for onchocerciasis, a total of 86 patients were submitted to an ophthalmologic exam that included external examination, slit lamp examination, intraocular pressure measurement, and a fundus ophthalmoscope examination. A high prevalence of onchocerciasis-related eye lesions was encountered in 68.6% of the patients. Punctate keratitis and ...

Intraocular osseous metaplasia. A clinico-pathological study.

Science.gov (United States)

Vemuganti, Geeta K; Honavar, Santosh G; Jalali, Subhadra

2002-09-01

To evaluate the clinico-pathologic features of intraocular osseous metaplasia. Pathology specimens of enucleated eyes submitted to the ophthalmic pathology service at a tertiary eye-care referral center between January 1995 and June 1999 were studied for intraocular osseous metaplasia. Specific histopathologic features noted in specimens with osseous metaplasia were the presence of retinal detachment, gliosis, retinal pigment epithelial hyperplasia, drusen, epiretinal membrane, fibrovascular proliferation and inflammation. Immunohistochemistry using monoclonal antibody against glial fibrillary acidic protein was performed to assess the glial component within the membranes and the proliferative vitreoretinal mass. Clinical records were reviewed and correlated with histopathologic findings. Osseous metaplasiaS was noted in 8 of 151 (5.2%) eyes examined. Clinical diagnosis in these was phthisis bulbi, staphyloma, absolute glaucoma and microphthalmos. Enucleation was performed for relief of symptoms (in painful blind eyes) or for cosmesis, and in an eye inciting sympathetic ophthalmia. Retinal detachment, gliosis and retinal pigment epithelial hyperplasia were noted in all the cases. Drusen with calcification or ossification (5 of 8), fibrovascular proliferation in the vitreous (5 of 8) and active inflammation (4 of 8) were the other associated histologic features. Location of ossification was subretinal in 3 cases, preretinal (ora serrata) in 1 case and in both locations in 4 cases. The eyes with subretinal osseous metaplasia had associated calcified drusen, while preretinal ossification was seen within the fibrovascular membranes. Chronic retinal detachment, hyperplasia and transdifferentiation of retinal pigment epithelium appear to be a few of the prerequisites for intraocular osseous metaplasia. Ossification can occur at isolated subretinal and preretinal locations or can involve both. Though a larger study is required to postulate the chronology of events, in

Intraocular osseous metaplasia. A clinico-pathological study

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Vemuganti Geeta

2002-01-01

Full Text Available Purpose: To evaluate the clinico-pathologic features of intraocular osseous metaplasia. Methods: Pathology specimens of enucleated eyes submitted to the ophthalmic pathology service at a tertiary eye-care referral center between January 1995 and June 1999 were studied for intraocular osseous metaplasia. Specific histopathologic features noted in specimens with osseous metaplasia were the presence of retinal detachment, gliosis, retinal pigment epithelial hyperplasia, drusen, epiretinal membrane, fibrovascular proliferation and inflammation. Immunohistochemistry using monoclonal antibody against glial fibrillary acidic protein was performed to assess the glial component within the membranes and the proliferative vitreoretinal mass. Clinical records were reviewed and correlated with histopathologic findings. Results: Osseous metaplasiaS was noted in 8 of 151 (5.2% eyes examined. Clinical diagnosis in these was phthisis bulbi, staphyloma, absolute glaucoma and microphthalmos. Enucleation was performed for relief of symptoms (in painful blind eyes or for cosmesis, and in an eye inciting sympathetic ophthalmia. Retinal detachment, gliosis and retinal pigment epithelial hyperplasia were noted in all the cases. Drusen with calcification or ossification (5 of 8, fibrovascular proliferation in the vitreous (5 of 8 and active inflammation (4 of 8 were the other associated histologic features. Location of ossification was subretinal in 3 cases, preretinal (ora serrata in 1 case and in both locations in 4 cases. The eyes with subretinal osseous metaplasia had associated calcified drusen, while preretinal ossification was seen within the fibrovascular membranes. Conclusion: Chronic retinal detachment, hyperplasia and transdifferentiation of retinal pigment epithelium appear to be a few of the prerequisites for intraocular osseous metaplasia. Ossification can occur at isolated subretinal and preretinal locations or can involve both. Though a larger study is

On the retinal toxicity of intraocular glucocorticoids.

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Torriglia, Alicia; Valamanesh, Fatemeh; Behar-Cohen, Francine

2010-12-15

Corticosteroids are hormones involved in many physiological responses such as stress, immune modulation, protein catabolism and water homeostasis. The subfamily of glucocorticoids is used systemically in the treatment of inflammatory diseases or allergic reactions. In the eye, glucocorticoides are used to treat macular edema, inflammation and neovascularization. The most commonly used glucocorticoid is triamcinolone acetonide (TA). The pharmaceutical formulation of TA is not adapted for intravitreal administration but has been selected by ophthalmologists because its very low intraocular solubility provides sustained effect. Visual benefits of intraocular TA do not clearly correlate with morpho-anatomical improvements, suggesting potential toxicity. We therefore studied, non-common, but deleterious effects of glucocorticoids on the retina. We found that the intravitreal administration of TA is beneficial in the treatment of neovascularization because it triggers cell death of endothelial cells of neovessels by a caspase-independent mechanism. However, this treatment is toxic for the retina because it induces a non-apoptotic, caspase-independent cell death related to paraptosis, mostly in the retinal pigmented epithelium cells and the Müller cells. Copyright © 2010 Elsevier Inc. All rights reserved.

LA RECEPCIÓN DEL CINE MEXICANO Y LAS CONSTRUCCIONES DE GÉNERO. ¿FORMACIÓN DE UNA AUDIENCIA NACIONAL?

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Patricia Torres San Martín

2008-01-01

Full Text Available Este artículo parte del análisis del cine nacional no como consumo sino como una práctica de cultura que produce y reproduce significados, en la recepción del cine como un "proceso de interacción, resignificación y negociación" de estos significados y en la audiencia como constructo y sujeto de una comunidad interpretativa. Me centraré en el análisis del material empírico que realicé con varios segmentos de audiencia de Guadalajara y dos películas mexicanas contemporáneas que marcaron un hito en la historia de la cinematografía nacional: Amores perros (2000, de Alejandro González Iñárritu, e ¡Y tu mamá también! (2001, de Alfonso Cuarón, para abrir una discusión de cómo la categoría analítica y referencial de género marcó las diferencias en la cinevidencia y producción discursiva de la audiencia participante.

Retropupillary Fixation of Iris-Claw Intraocular Lens for Aphakic Eyes in Children.

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Martina Brandner

Full Text Available To report outcome, complications and safety of retropupillary fixated iris-claw intraocular lenses in a pediatric population.Retrospective study.Ten consecutive pediatric patients (15 eyes underwent placement of retropupillary fixated iris-claw intraocular lenses between October 2007 and July 2013 at the Department of Ophthalmology, Medical University Graz and General Hospital Klagenfurt, Austria. Postoperative visual acuity and complications were analyzed.Median final best-corrected visual acuity improved by 0.12 logMAR from preoperative baseline. Mean postoperative spherical equivalent was -0.05 ± 1.76 D. No serious complications were observed intra- or postoperatively during the entire follow-up period of up to 40 months. One patient experienced a haptic disenclavation with IOL subluxation immediately after a car accident.Our study demonstrates that iris-claw intraocular lens implantation behind the iris is safe in children with lack of capsular support and yields excellent visual outcome with low complication rate.

Retropupillary Fixation of Iris-Claw Intraocular Lens for Aphakic Eyes in Children

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Brandner, Martina; Thaler-Saliba, Sarah; Plainer, Sophie; Vidic, Bertram; El-Shabrawi, Yosuf; Ardjomand, Navid

2015-01-01

Purpose To report outcome, complications and safety of retropupillary fixated iris-claw intraocular lenses in a pediatric population. Design Retrospective study. Patients and Methods Ten consecutive pediatric patients (15 eyes) underwent placement of retropupillary fixated iris-claw intraocular lenses between October 2007 and July 2013 at the Department of Ophthalmology, Medical University Graz and General Hospital Klagenfurt, Austria. Postoperative visual acuity and complications were analyzed. Results Median final best-corrected visual acuity improved by 0.12 logMAR from preoperative baseline. Mean postoperative spherical equivalent was -0.05 ± 1.76 D. No serious complications were observed intra- or postoperatively during the entire follow-up period of up to 40 months. One patient experienced a haptic disenclavation with IOL subluxation immediately after a car accident. Conclusion Our study demonstrates that iris-claw intraocular lens implantation behind the iris is safe in children with lack of capsular support and yields excellent visual outcome with low complication rate. PMID:26110864

Anti-tubercular therapy for intraocular tuberculosis: A systematic review and meta-analysis.

Science.gov (United States)

Kee, Ae Ra; Gonzalez-Lopez, Julio J; Al-Hity, Aws; Gupta, Bhaskar; Lee, Cecilia S; Gunasekeran, Dinesh Visva; Jayabalan, Nirmal; Grant, Robert; Kon, Onn Min; Gupta, Vishali; Westcott, Mark; Pavesio, Carlos; Agrawal, Rupesh

2016-01-01

Intraocular tuberculosis remains a diagnostic and management conundrum for both ophthalmologists and pulmonologists. We analyze the efficacy and safety of anti-tubercular therapy (ATT) in patients with intraocular tuberculosis and factors associated with favorable outcome. Twenty-eight studies are included in this review, with a total of 1,917 patients. Nonrecurrence of inflammation was observed in pooled estimate of 84% of ATT-treated patients (95% CI 79-89). There was minimal difference in the outcome between patients treated with ATT alone (85% successful outcome; 95% CI 25-100) and those with concomitant systemic corticosteroid (82%; 95% CI 73-90). The use of ATT may be of benefit to patients with suspected intraocular tuberculosis; however, this conclusion is limited by the lack of control group analysis and standardized recruitment and treatment protocols. We propose further prospective studies to better establish the efficacy of ATT and ascertain the factors associated with favorable treatment outcomes. Copyright © 2016 Elsevier Inc. All rights reserved.

Intraocular pressure menagement with transpalpebral tonometry

OpenAIRE

Toker, Mustafa İlker; Dursun, Ayhan

2013-01-01

Applanation tonometry is the method of measuring intraocular pressure (IOP) with instruments the corneal surface. The Goldmann applanation tonometer (GAT) is regarded as the “gold standard’’ of measuring IOP. An irregular and opaque corneal surface compromises IOP measurement by Goldmann applanation tonometry. In such cases accurate measurement without corneal contact would be applicable. The transpalpebral tonometer is new method and measures IOP without corneal contact through the eyelid....

Liquid-crystal intraocular adaptive lens with wireless control

NARCIS (Netherlands)

Simonov, A.N.; Vdovine, G.V.; Loktev, M.

2007-01-01

We present a prototype of an adaptive intraocular lens based on a modal liquid-crystal spatial phase modulator with wireless control. The modal corrector consists of a nematic liquid-crystal layer sandwiched between two glass substrates with transparent low- and high-ohmic electrodes, respectively.

Clinical analysis of modified trabeculectomy in glaucoma surgery with high elevated intraocular pressure

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Cang-Xia Zhang

2013-10-01

Full Text Available AIM: To make a retrospective analysis of the clinical data of modified trabeculectomy in treating glaucoma surgery with high elevated intraocular pressure retrospectively and evaluate the effect of modified trabeculectomy.METHODS:One hundred acute angle-closure glaucoma patients(100 eyeswith persistent high intraocular pressure were divided into treatment group(45 eyesand control group(55 eyes. Patients in treatment group was treated with by trabeculectomy, while those in control group received modified trabeculectomy. The modified measures include stellate ganglion block preoperative, topical anesthesia and local anesthesia with 20g/L lidocaine cotton-piece, to make scleral flap with sclerotome, to release aqueous humor outflow slowly after paracentesis of anterior chamber, and using mydriatic and cycloplegic during and after surgery.RESULTS: The incidence of operation complicationin control group was lower than that in treatment group. The differences were statistically significant(Pt=9.1535, Pt=39.8010, Pt=11.3219, PCONCLUSION: The modified trabeculectomy applied in the treatment of glaucoma with persistent high intraocular pressure can not only save the visual function of connection part to a certain extent, but also reduce the incidence of serious complications. It can obtain better intraocular pressure, shorten the average hospitalization days, decrease the expenses and increase patients satisfaction.

Editorial

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Renzo Ramírez Bacca

2012-01-01

Full Text Available La internacionalización de HiSTOReLo es evidente no sólo en la composición y calidad de su Comité Científico, sino también porque la revista está abierta a proyectos de publicación de factura internacional, como lo propone el primer segmento del presente vol. 4, núm. 7 de 2012. Nuestros pares académicos de Argentina y México son muestra de ello.  El segundo segmento se relaciona con el caso antioqueño en Colombia y ofrece tres artículos en que ubican a la ciudad de Medellín y su entorno en un marco de cambios urbanos, sociales y culturales  a comienzos del siglo XX. Finalmente, se ofrece un tercer segmento con cuatro textos relacionados con idearios políticos e ideológicos del caso colombiano en los que tiene experiencias de las regiones de Boyacá, Antioquia y Tolima.

Análisis del Mercado inmobiliario urbanoresidencial de Serena–Coquimbo: El caso de Las Compañías.

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Ramón Gili Busquet

2004-01-01

Full Text Available La mercantilización del espacio urbano, inherente al sistema económico de libre mercado, que busca maximizar la rentabilidad inmobiliaria, induce a la concentración de las viviendas sociales en algún sector de la ciudad, liberando al resto del área urbana del efecto desvalorizador de su entorno que generan las poblaciones sociales. Producto de esta dinámica, surge la segregación social habitacional, claramente presente en las áreas metropolitanas de Chile (Santiago, Valparaíso y Concepción, pero que también comienza a manifestarse en las ciudades intermedias del país, como es el caso de La Serena y Coquimbo, lo que es el tema del presente estudio. Se pretende revelar las características de dicho fenómeno, y sus efectos negativos, no solo sobre los habitantes afectados por la segregación, sino también sobre el propio mercado inmobiliario, que se ve privado de un segmento de su potencial demanda, producto de la inmovilidad habitacional de los estratos socioeconómicos más bajos.

Changes in intraocular pressure and horizontal pupil diameter ...

African Journals Online (AJOL)

The objective of this study was to determine the effects of topical 0.5% tropicamide, 1% atropine sulphate and 10% phenylephrine hydrochloride ophthalmic solutions on intraocular pressure (IOP) and horizontal pupil diameter (HPD) in the dog during the first hour after treatment. Forty clinically and ophthalmologically ...

Resultados del implante múltiple de lentes intraoculares en la cirugía de catarata en el Instituto Cubano de Oftalmología "Ramón Pando Ferrer" Results of the multiple intraocular lenses implantation in the cataract surgery performed at "Ramón Pando Ferrer" Cuban Institute of Ophthalmology

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Eric Montero Díaz

2010-06-01

Full Text Available OBJETIVO: Valorar los resultados visuales de los pacientes operados con la técnica de piggy back o implantes múltiples de lentes intraoculares. MÉTODOS: Se realizó un estudio descriptivo retrospectivo de corte transversal en el que se tomaron 32 ojos de 30 pacientes del universo operado de catarata, con la técnica antes descrita, en el Instituto Cubano de Oftalmología "Ramón Pando Ferrer", en el período comprendido entre enero de 2000 hasta diciembre de 2006. Fueron evaluadas algunas variables demográficas, como edad y sexo, así como agudeza visual y refracción preoperatorio y posoperatoria con cristales y sin ellos. Reportamos las complicaciones transquirúrgicas y posquirúrgicas asociadas a las diferentes técnicas quirúrgicas empleadas para la extracción del cristalino. RESULTADOS: La edad promedio obtenida fue mayor de 50 años, y predominó el sexo femenino. Parte de los pacientes tuvieron una agudeza visual corregida superior a 20/40. La complicación más frecuente fue la opacidad de la cápsula posterior y solo en la tercera parte de los pacientes se obtuvo una buena corrección refractiva. CONCLUSIONES: La técnica de piggy back permitió la recuperación de cuatro líneas en la cartilla de Snellen en la agudeza visual corregida, mientras que en la agudeza visual sin corrección solo aumentó en dos líneas. Se encontró igual número de pacientes hipocorregidos y bien corregidos.OBJECTIVE: To asses the visual results of patients operated on by piggy back technique or multiple implantation of intraocular lenses METHODS: A retrospective cross-sectional descriptive study was conducted in 32 eyes from 30 patients operated on from cataract, using the above-mentioned technique, at "Ramon Pando Ferrer" Cuban Institute of Ophthalmology in the period January 2000 through December 2006. Some demographic variables as age and sex as well as visual acuity and preoperative and postoperative refraction with/without lenses were evaluated

Visual outcome with the Oculentis Mplus intraocular lens

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Si-Yuan Liu

2017-11-01

Full Text Available AIM: To evaluate the visual outcome of Oculentis Mplus intraocular lens(IOL.METHODS: Totally 20 eyes in 20 patients received phacoemulsification and Oculentis Mplus intraocular lens implantation were as test group, and 20 eyes(Aspira-aA IOLwere as control group. The following postoperative examinations were performed after operation for 3mo: uncorrected visual acuity of distance and near, refractive results, UBM examination, the rate of wearing spectacles and the complications. RESULTS: At 3mo after surgery, distance visual acuity of test group with Oculentis Mplus IOL were 0.10±0.03,the difference with control group was not significant(t=1.74, P>0.05. Eyes in test group had an uncorrected near acuity 0.11±0.04, the difference with control group was significant(t=15.53, PCONCLUSION: The implantation of Oculentis Mplus IOL not only has a good distance uncorrected visual acuity, but also with better near visual acuity. The surgery is safe, reliable and no special complication induced.

An ultralow power wireless intraocular pressure monitoring system

International Nuclear Information System (INIS)

Liu Demeng; Mei Niansong; Zhang Zhaofeng

2014-01-01

This paper describes an ultralow power wireless intraocular pressure (IOP) monitoring system that is dedicated to sensing and transferring intraocular pressure of glaucoma patients. Our system is comprised of a capacitive pressure sensor, an application-specific integrated circuit, which is designed on the SMIC 180 nm process, and a dipole antenna. The system is wirelessly powered and demonstrates a power consumption of 7.56 μW at 1.24 V during continuous monitoring, a significant reduction in active power dissipation compared to existing work. The input RF sensitivity is −13 dBm. A significant reduction in input RF sensitivity results from the reduction of mismatch time of the ASK modulation caused by FM0 encoding. The system exhibits an average error of ± 1.5 mmHg in measured pressure. Finally, a complete IOP system is demonstrated in the real biological environment, showing a successful reading of the pressure of an eye. (semiconductor integrated circuits)

INTRAOCULAR AND SERUM LEVELS OF VASCULAR ENDOTHELIAL GROWTH FACTOR IN ACUTE RETINAL NECROSIS AND OCULAR TOXOPLASMOSIS

NARCIS (Netherlands)

Wiertz, Karin; De Visser, Lenneke; Rijkers, Ger; De Groot-Mijnes, Jolanda; Los, Leonie; Rothova, Aniki

2010-01-01

Purpose: To determine the intraocular and serum vascular endothelial growth factor (VEGF) levels in patients with acute retinal necrosis (ARN) and compare those with VEGF levels found in patients with ocular toxoplasmosis (OT). Methods: Paired intraocular fluid and serum samples of 17 patients with

Intraocular Pressure in Pregnant and Non-Pregnant Nigerian Women

African Journals Online (AJOL)

Erah

. ... ocular diseases and these were used as the exclusion ... between groups with student's t-test. ... SD = standard deviation, SEM = standard error of mean, N= .... 38(4):229-34. 26. Qureshi IA. Intraocular pressure and pregnancy. Clin. Med.

Systems genetics identifies a role for Cacna2d1 regulation in elevated intraocular pressure and glaucoma susceptibility

OpenAIRE

Chintalapudi, Sumana R.; Maria, Doaa; Di Wang, Xiang; Bailey, Jessica N. Cooke; Hysi, Pirro G.; Wiggs, Janey L.; Williams, Robert W.; Jablonski, Monica M.

2017-01-01

textabstractGlaucoma is a multi-factorial blinding disease in which genetic factors play an important role. Elevated intraocular pressure is a highly heritable risk factor for primary open angle glaucoma and currently the only target for glaucoma therapy. Our study helps to better understand underlying genetic and molecular mechanisms that regulate intraocular pressure, and identifies a new candidate gene, Cacna2d1, that modulates intraocular pressure and a promising therapeutic, pregabalin, ...

El clima en relación a las actividades, la fidelidad y la satisfacción del turista náutico que visita la ruta del sol (Ecuador

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Yen E. Lam González

2018-01-01

Full Text Available El clima es un atributo del destino capaz de influir en el comportamiento turístico, especialmente en aquellos segmentos motivados por el ocio y la recreación al aire libre. En turismo náutico, el clima es esencial, porque condiciona la realización de la actividad náutica. Frente a la escasez de investigaciones que estudien la relación entre clima y comportamiento náutico, este artículo propone un modelo de regresión logística ordinal, que permite medir el impacto del clima en la cantidad de actividades náuticas, el número de visitas al destino y la satisfacción global del turista, y compararlo con el efecto del resto de atributos. Como resultado de encuestar a 201 turistas náuticos, nacionales y extranjeros, de visita en la Ruta del Sol (Ecuador en el 2015, se ha podido comprobar que la satisfacción climática del practicante náutico es esencial para garantizar su satisfacción con el destino. El estudio también pone de relieve el efecto dominante que ejerce el clima sobre el comportamiento náutico y la fidelidad del turista extranjero, lo que demuestra la importancia de trabajar en el diseño de productos y servicios con información climático-meteorológica, para la gestión del turismo náutico internacional en este destino. Sin embargo, en aras de elevar la fidelidad y estimular el consumo náutico del mercado nacional, se requiere trabajar en otros aspectos, que se descubren a lo largo de este trabajo.

Cambios de la presión intraocular en pacientes con hipertensión arterial

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G. Tenorio-Guajardo

2014-07-01

Conclusiones: En este estudio se encontró correlación entre presión intraocular y la presión arterial diastólica, pero no se encontró correlación entre la sistólica. Es recomendable vigilar la presión intraocular en pacientes hipertensos, especialmente en aquellos con hipertensión diastólica persistente y con antecedentes familiares de glaucoma.

Photodynamic therapy of intraocular cancers

International Nuclear Information System (INIS)

Gravier, N.; Duvournau, Y.; Querec, M.A.; Pechereau, A.; Patrice, T.

1992-01-01

The most common intraocular tumors are choroidal malignant melanomas (70%) and retinoblastomas (13%). Each time that visual acuity is preserved, various conservative treatments are considered relative to the potential risk of metastatic disease during enucleation. In addition to standard techniques, photodynamic therapy is a potentially attractive new approach limited in its effects to the area of the treated tumor. The purpose of this preclinical study is to determine a reference dose-effect for single laser doses and to study effects of fractionation of the laser dose. (author). 9 refs., 1 tab

[Hyperopic Laser-in-situ-Keratomileusis after trifocal intraocular lens implantation : Aberration-free femto-Laser-in-situ-Keratomileusis treatment after implantation of a diffractive, multifocal, toric intraocular lens-case analysis].

Science.gov (United States)

Hemkeppler, E; Böhm, M; Kohnen, T

2018-05-29

A 52-year-old highly myopic female patient was implanted with a multifocal, diffractive, toric intraocular lens because of the wish to be independent of eyeglasses. Despite high-quality, extensive preoperative examinations, a hyperopic refractive error remained postoperatively, which led to the patient's dissatisfaction. This error was treated with Laser-in-situ-Keratomileusis (LASIK). After corneal LASIK treatment and implantation of a diffractive toric multifocal intraocular lens the patient showed a good postoperative visual result without optical phenomena.

Visual performance after the implantation of a new trifocal intraocular lens

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Vryghem JC

2013-10-01

Full Text Available Jérôme C Vryghem,1,2 Steven Heireman1,21Brussels Eye Doctors, Brussels, Belgium; 2Clinique Saint-Jean, Brussels, BelgiumPurpose: To evaluate the subjective and objective visual results after the implantation of a new trifocal diffractive intraocular lens.Methods: A new trifocal diffractive intraocular lens was designed combining two superimposed diffractive profiles: one with +1.75 diopters (D addition for intermediate vision and the other with +3.50 D addition for near vision. Fifty eyes of 25 patients that were operated on by one surgeon are included in this study. The uncorrected and best distance-corrected monocular and binocular, near, intermediate, and distance visual acuities, contrast sensitivity, and defocus curves were measured 6 months postoperatively. In addition to the standard clinical follow-up, a questionnaire evaluating individual satisfaction and quality of life was submitted to the patients.Results: The mean age of patients at the time of surgery was 70 ± 10 years. The mean uncorrected and corrected monocular distance visual acuity (VA were LogMAR 0.06 ± 0.10 and LogMAR 0.00 ± 0.08, respectively. The outcomes for the binocular uncorrected distance visual acuity were almost the same (LogMAR −0.04 ± 0.09. LogMAR −010 ± 0.15 and 0.02 ± 0.06 were measured for the binocular uncorrected intermediate and near VA, respectively. The distance-corrected visual acuity was maintained in mesopic conditions. The contrast sensitivity was similar to that obtained after implantation of a bifocal intraocular lens and did not decrease in mesopic conditions. The binocular defocus curve confirms good VA even in the intermediate distance range, with a moderate decrease of less than LogMAR 0.2 at −1.5 D, with respect to the best distance VA at 0 D defocus. Patient satisfaction was high. No discrepancy between the objective and subjective outcomes was evidenced.Conclusion: The introduction of a third focus in diffractive multifocal

Method for producing an isoplanatic aspheric monofocal intraocular lens, and resul ting lens

OpenAIRE

Barbero, Sergio; Marcos, Susana; Dorronsoro, Carlos; Montejo, Javier; Salazar Salegui, Pedro

2010-01-01

[EN] The invention can be used to obtain isoplanatic aspheric mono focal intraocular lenses in a viewing range of up to 25° (preferably up to 10°). The method comprises the following steps: l. mathematical defmition of an aphakic eye model; 2. mathematical definition of an intraocular lens model; 3. mathematical defmition of the implantation of the lens; 4. mathematical defmition of the merit function; 5. definition of the contour conditions; 6. defmition of a measurement for charact...

Intraocular pressure-lowering effect of oral paracetamol and its in vitro corneal penetration properties

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Mohamed N

2013-01-01

Full Text Available Nabiel Mohamed, David MeyerDivision of Ophthalmology, Faculty of Medicine and Health Sciences, University of Stellenbosch, Cape Town, South AfricaBackground: Several studies have confirmed the ability of cannabinoids to reduce intraocular pressure. Experimental data recently demonstrated unequivocally that the analgesic effect of paracetamol is due to its indirect action on cannabinoid receptors. The question then arises as to whether paracetamol can reduce intraocular pressure via its effect on intraocular cannabinoid receptors.Methods: A 2-week, prospective, randomized, controlled, single-center, parallel-group pilot study was carried out to determine the efficacy and safety of paracetamol 1 g orally administered every 6 hours in adult patients with primary or secondary open angle glaucoma as compared with topical levobunolol 0.5% twice a day. Patient well-being was closely monitored throughout the study and focused on hepatic safety in accordance with Drug-Induced Liver Injury Network criteria. The in vitro diffusion kinetics of acetaminophen in a phosphate-buffered solution in rabbit and human corneas was also investigated, with the view to a topical application.Results: Eighteen adult patients were enrolled in the study, with nine in the topical levobunolol group and nine in the oral paracetamol group. In the levobunolol group, the mean reduction in intraocular pressure at day 7 was 7.5 mmHg (P < 0.008 and at day 14 was 9.1 mmHg (P < 0.005, from a mean baseline intraocular pressure of 29.6 mmHg. The corresponding figures for the paracetamol group were 8.8 mmHg (P < 0.0004 at day 7 and 6.5 mmHg (P < 0.004 at day 14, from a mean baseline intraocular pressure of 29.4 mmHg. Both study regimens were well tolerated. No serious treatment-related adverse events were reported in either of the treatment groups. Liver function tests, systolic/diastolic blood pressure, or heart rate remained unchanged in both groups during the 2 weeks of the study. In

Bartonella and intraocular inflammation: a series of cases and review of literature

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Kalogeropoulos C

2011-06-01

Full Text Available Chris Kalogeropoulos1, Ioannis Koumpoulis1, Andreas Mentis2, Chrisavgi Pappa1, Paraskevas Zafeiropoulos1, Miltiadis Aspiotis11Department of Ophthalmology, Medical School, University of Ioannina, Greece; 2Laboratory of Medical Microbiology, Hellenic Pasteur Institute, Athens, GreecePurpose: To present various forms of uveitis and/or retinal vasculitis attributed to Bartonella infection and review the impact of this microorganism in patients with uveitis.Methods: Retrospective case series study. Review of clinical records of patients diagnosed with Bartonella henselae and Bartonella quintana intraocular inflammation from 2001 to 2010 in the Ocular Inflammation Department of the University Eye Clinic, Ioannina, Greece. Presentation of epidemiological and clinical data concerning Bartonella infection was provided by the international literature.Results: Eight patients with the diagnosis of Bartonella henselae and two patients with B. quintana intraocular inflammation were identified. Since four patients experienced bilateral involvement, the affected eyes totaled 14. The mean age was 36.6 years (range 12–62. Uveitic clinical entities that we found included intermediate uveitis in seven eyes (50%, vitritis in two eyes (14.2%, neuroretinitis in one eye (7.1%, focal retinochoroiditis in one eye (7.1%, branch retinal vein occlusion (BRVO due to vasculitis in one eye (7.1%, disc edema with peripapillary serous retinal detachment in one eye (7.1%, and iridocyclitis in one eye (7.1%. Most of the patients (70% did not experience systemic symptoms preceding the intraocular inflammation. Antimicrobial treatment was efficient in all cases with the exception of the case with neuroretinitis complicated by anterior ischemic optic neuropathy and tubulointerstitial nephritis.Conclusion: Intraocular involvement caused not only by B. henselae but also by B. quintana is being diagnosed with increasing frequency. A high index of suspicion is needed because the

Evaluation of Different Power of Near Addition in Two Different Multifocal Intraocular Lenses

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Ugur Unsal

2016-01-01

Full Text Available Purpose. To compare near, intermediate, and distance vision and quality of vision, when refractive rotational multifocal intraocular lenses with 3.0 diopters or diffractive multifocal intraocular lenses with 2.5 diopters near addition are implanted. Methods. 41 eyes of 41 patients in whom rotational +3.0 diopters near addition IOLs were implanted and 30 eyes of 30 patients in whom diffractive +2.5 diopters near addition IOLs were implanted after cataract surgery were reviewed. Uncorrected and corrected distance visual acuity, intermediate visual acuity, near visual acuity, and patient satisfaction were evaluated 6 months later. Results. The corrected and uncorrected distance visual acuity were the same between both groups (p=0.50 and p=0.509, resp.. The uncorrected intermediate and corrected intermediate and near vision acuities were better in the +2.5 near vision added intraocular lens implanted group (p=0.049, p=0.005, and p=0.001, resp. and the uncorrected near vision acuity was better in the +3.0 near vision added intraocular lens implanted group (p=0.001. The patient satisfactions of both groups were similar. Conclusion. The +2.5 diopters near addition could be a better choice in younger patients with more distance and intermediate visual requirements (driving, outdoor activities, whereas the + 3.0 diopters should be considered for patients with more near vision correction (reading.

Patología colorrectal

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Dr. M. Raúl Acuña

2014-01-01

Full Text Available En este artículo se abordan las patologías colorrectales más prevalentes en relación a la salud del hombre. Dado lo extenso del tema se han excluído aquellas patologías que comprometiendo este segmento del aparato digestivo también involucran otras áreas de este mismo sistema. Por este motivo nos centraremos en los siguientes problemas: enfermedad diverticular de colon, enfermedades inflamatorias intestinales (colitis ulcerosa idiopática y enfermedad de Crohn, alteraciones por isquemia y compromiso secundario a radioterapia de este segmento del aparato digestivo. El cáncer colorrectal, patología de alta relevancia, no se desarrollará pues recientemente fue revisado en un número de esta misma revista.

Systems genetics identifies a role for Cacna2d1 regulation in elevated intraocular pressure and glaucoma susceptibility.

Science.gov (United States)

Chintalapudi, Sumana R; Maria, Doaa; Di Wang, Xiang; Bailey, Jessica N Cooke; Hysi, Pirro G; Wiggs, Janey L; Williams, Robert W; Jablonski, Monica M

2017-11-24

Glaucoma is a multi-factorial blinding disease in which genetic factors play an important role. Elevated intraocular pressure is a highly heritable risk factor for primary open angle glaucoma and currently the only target for glaucoma therapy. Our study helps to better understand underlying genetic and molecular mechanisms that regulate intraocular pressure, and identifies a new candidate gene, Cacna2d1, that modulates intraocular pressure and a promising therapeutic, pregabalin, which binds to CACNA2D1 protein and lowers intraocular pressure significantly. Because our study utilizes a genetically diverse population of mice with known sequence variants, we are able to determine that the intraocular pressure-lowering effect of pregabalin is dependent on the Cacna2d1 haplotype. Using human genome-wide association study (GWAS) data, evidence for association of a CACNA2D1 single-nucleotide polymorphism and primary open angle glaucoma is found. Importantly, these results demonstrate that our systems genetics approach represents an efficient method to identify genetic variation that can guide the selection of therapeutic targets.

A study of patient satisfaction after cataract surgery with implantation of different types of intraocular lenses

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Wei Ching-Kuo

2012-10-01

Full Text Available Abstract Background The implementation of capitated payment has driven medical institutions through developing balance billing for medical services. By exploring the patients’ decision-making factors on different self-pay items, a reference for the pricing and sales strategy for the related products can be formed. The major purposes of this study were to analyze the determinants of preoperative selection and postoperative satisfaction with implantation of different types of intraocular lenses in cataract surgery. Methods This cross-sectional study consisted of 127 patients that were 50 years of age and older, and who had phacoemulsification with intraocular lens implantation in both eyes. Data were collected by using a structured questionnaire. The following parameters were measured: access to medical care, attitude towards receiving medical products at one’s own expense, overall patient satisfaction and postoperative visual clarity. Results The results showed that the patient’s gender, educational level and economic status influenced the type of intraocular lens chosen. Patients in the insurance group cared about access to medical care, and patients in the balance billing group cared about product differentiation. ANOVA results showed no statistically significant differences in the overall satisfaction of the patients among the groups with different types of intraocular lenses. Patients that received cataract surgery with implantation of multifocal intraocular lenses had better vision when trying to view smaller objects and when looking at objects under strong light. Conclusions Manufacturers should increase the number of differences between their products, and health care providers can then recommend the appropriate intraocular lens in accordance with the needs or demands of their patients, and also by keeping in mind the financial constraints of their patients.

A study of patient satisfaction after cataract surgery with implantation of different types of intraocular lenses.

Science.gov (United States)

Wei, Ching-Kuo; Wang, Shun-Mu; Lin, Jen-Chieh

2012-10-29

The implementation of capitated payment has driven medical institutions through developing balance billing for medical services. By exploring the patients' decision-making factors on different self-pay items, a reference for the pricing and sales strategy for the related products can be formed. The major purposes of this study were to analyze the determinants of preoperative selection and postoperative satisfaction with implantation of different types of intraocular lenses in cataract surgery. This cross-sectional study consisted of 127 patients that were 50 years of age and older, and who had phacoemulsification with intraocular lens implantation in both eyes. Data were collected by using a structured questionnaire. The following parameters were measured: access to medical care, attitude towards receiving medical products at one's own expense, overall patient satisfaction and postoperative visual clarity. The results showed that the patient's gender, educational level and economic status influenced the type of intraocular lens chosen. Patients in the insurance group cared about access to medical care, and patients in the balance billing group cared about product differentiation. ANOVA results showed no statistically significant differences in the overall satisfaction of the patients among the groups with different types of intraocular lenses. Patients that received cataract surgery with implantation of multifocal intraocular lenses had better vision when trying to view smaller objects and when looking at objects under strong light. Manufacturers should increase the number of differences between their products, and health care providers can then recommend the appropriate intraocular lens in accordance with the needs or demands of their patients, and also by keeping in mind the financial constraints of their patients.

Lente intra-ocular opaca em diplopia intratável: relato de caso Opaque intraocular lens in intractable diplopia: case report

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Fernanda Teixeira Krieger

2006-08-01

Full Text Available Diplopia intratável tem sido descrita em várias situações. Métodos convencionais como prismas e correção cirúrgica do estrabismo falham em neutralizá-la. O objetivo do trabalho é documentar o caso de uma paciente com estrabismo de longa data, cuja diplopia deteriorou-se ao longo dos anos, e não foi possível resolução com cirurgia, prisma, e oclusão com óculos e lente de contato com pupila opaca. A paciente foi então submetida à facoemulsificação com implante de lente intra-ocular opaca que atingiu o objetivo desejado.Intractable diplopia has been described in many situations but poor results are the rule with standard treatment modalities. The authors report a case of a woman with long-standing strabismus and diplopia who failed to improve following surgery, prism, and occlusive spectacles or contact lenses. Then, she was submitted to phacoemulsification and opaque intraocular lens implantation, which successfully neutralized diplopia.

Tratamento de uma coorte de pacientes com infarto agudo do miocárdio com supradesnivelamento do segmento ST Tratamiento de una cohorte de pacientes con infarto agudo de miocardio con supradesnivel del segmento ST Treatment of a cohort of patients with acute myocardial infarction and ST-segment elevation

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Jamil da Silva Soares

2009-06-01

Full Text Available FUNDAMENTO: Trombólise e angioplastia transluminal coronariana (ATC primária são técnicas bem estabelecidas, mas grande parte dos pacientes com infarto agudo do miocárdio com supradesnivelamento do segmento ST (IAM com SST não as recebem quando do atendimento hospitalar. OBJETIVO: Descrever tratamentos inicial e final e desfechos de uma coorte com IAM com SST. MÉTODOS: Analisados, da internação até a alta, 158 pacientes com IAM com SST, de uma população total de 351 pacientes internados com (SCA nos hospitais de Campos dos Goytacazes, entre 2004 e 2006. RESULTADOS: Dos 158 pacientes com IAM com SST, 67,7% chegaram ao hospital nos primeiros 180 minutos, 81,3% em 360 minutos e 8,4% após doze horas. Realizados 148 estudos cinecoronariográficos (93,7%. Observadas lesões de mais de 70% em 266 territórios arteriais. Tratamento inicial foi ATC em 41(26%, trombolíticos em 50 (32%, com 80% de sucesso. Tratamento clínico em 67 (42%. Cerca de 35% dos pacientes deveriam ser trombolizados mas não o foram. No tratamento final foram 93 ATCs, 89 delas com sucesso angiográfico (95,7, sangramento 2 (2,2, oclusão subaguda 2 (2,2%, dissecção tronco 1 (1,1, pseudo aneurisma 1 (1,1. Nenhum óbito durante angioplastia; na evolução, houve dois óbitos (2,1%. Doze pacientes submetidos a cirurgia de revascularização miocárdica (CRM. Tratamento clínico 53 (33%, com 11 óbitos (20,7%. Letalidade global 9,5%, consideradas as três formas de tratamento. CONCLUSÃO: Pacientes atendidos em tempo adequado para reperfusão, porém 1/3 deles não recebeu o procedimento. Tratamento predominante foi ATC, com baixa morbidade. Dois óbitos na evolução. Baixa letalidade global.FUNDAMENTO: La trombólisis y la angioplastia transluminal coronaria (ATC primaria son técnicas bien establecidas, sin embargo gran parte de los pacientes con infarto agudo de miocardio con supradesnivel del segmento ST (IAM con SST no las reciben cuando de la atenci

Factores de calidad del servicio en el transporte público de pasajeros: estudio de caso de la ciudad de Toluca, México

OpenAIRE

Óscar Sánchez-Flores

2010-01-01

En este artículo se identifican, ponderan y valoran los factores que intervienen en la percepción de la calidad de servicio del transporte público en un corredor urbano que se caracteriza por una gestión delegada con tarifa fija y competencia en calidad. Mediante un modelo logit con especificación lineal de la función de utilidad, se estiman los coeficientes de cada factor de calidad de servicio para diferentes segmentos y estratos de la población. Los resultados de la estimación econométrica...

El desarrollo del sector asegurador y el crecimiento económico: un análisis empírico para 47 países

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Anelena Sabater Castro

2017-12-01

Full Text Available Este estudio examina el efecto del desarrollo del mercado asegurador –tanto del segmento de vida como de no vida[1]– sobre el crecimiento económico, así como las condiciones (grado de desarrollo financiero, nivel de ingresos y entorno institucional que afectan el nexo de ambas variables. Para ello se utiliza el método generalizado de momentos (GMM, con un modelo dinámico de datos de panel para 47 países, entre 1990 y 2014. Los resultados revelan que existe un impacto positivo del desarrollo del mercado de seguros sobre el crecimiento económico. Además, la relación entre el desarrollo del mercado asegurador y el crecimiento económico se ve aminorada en un entorno institucional relativamente más sólido. Por otra parte, los resultados sugieren que el impacto positivo del desarrollo del mercado de seguros en el crecimiento económico se mitiga en los países de ingresos altos. [1] Existen dos grandes categorías de seguros: vida y no vida. Los seguros de vida se caracterizan porque el pago de la cantidad pactada (suma asegurada depende del fallecimiento o supervivencia del asegurado. Los seguros generales o de no vida cubren riesgos que puedan ocasionar daños a los bienes o derechos del asegurado, etc.

A new Lepeophtheirus (Copepoda: Siphonostomatoida: Caligidae from Isla del Coco National Park, Costa Rica, Eastern Tropical Pacific

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Eduardo Suárez-Morales

2012-11-01

copépodo calígido del género Lepeophtheirus con base en especímenes femeninos recolectados a partir de muestras de plancton en aguas de Bahía Wafer, isla del Coco, una isla oceánica del Pacífico Tropical Oriental. La nueva especie, L. alvaroi sp. nov., tiene algunas afinidades con congéneres que poseen un abdomen relativamente corto, un complejo genital más ancho que largo y un exópodo de la pata 4 con 3 segmentos. Esta especie difiere de la mayoría de estas especies por la presencia de un proceso maxilular no ramificado y por el tamaño relativo de las garras terminales de la pata 4, con dos elementos igualmente largos. Está más cercanamente relacionada con otras dos especies del Pacífico Oriental: L. dissimulatus Wilson, 1905 y L. clarionensis Shiino, 1959. Difiere de estas especies por las proporciones y forma del complejo genital, la forma de la furca esternal, la longitud relativa de los segmentos maxilares, la ausencia de un proceso pectiniforme en el segmento maxilar distal, la longitud de la pata 4 y la armadura de la pata 5. La nueva especie representa el primer Lepeophtheirus descrito en aguas del Pacífico de Costa Rica. La baja diversidad del género en esta región tropical se explica por su tendencia a preferir hospederos de latitudes templadas. Hasta encontrar más evidencia, el hospedero de esta especie de Lepeophtheirus permanece desconocida.

Experimental differentiation of intraocular masses using ultrahigh-field magnetic resonance imaging--a case series.

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Karen Falke

Full Text Available PURPOSE: The case reports presented here were compiled to demonstrate the potential for improved diagnosis and monitoring of disease progress of intraocular lesions using ultrahigh-field magnetic resonance microscopy (MRM at 7.1 Tesla. METHODS: High-resolution ex vivo ocular magnetic resonance (MR images were acquired on an ultrahigh-field MR system (7.1 Tesla, ClinScan, Bruker BioScan, Germany using a 2-channel coil with 4 coil elements and T2-weighted turbo spin echo (TSE sequences of human eyes enucleated because of different intraocular lesions. Imaging parameters were: 40×40 mm field of view, 512×512 matrix, and 700 µm slice thickness. The results were correlated with in vivo ultrasound and histology of the enucleated eyes. RESULTS: Imaging was performed in enucleated eyes with choroidal melanoma, malignant melanoma of iris and ciliary body with scleral perforation, ciliary body melanoma, intraocular metastasis of esophageal cancer, subretinal bleeding in the presence of perforated corneal ulcer, hemorrhagic choroidal detachment, and premature retinopathy with phthisis and ossification of bulbar structures. MR imaging allowed differentiation between solid and cystic tumor components. In case of hemorrhage, fluid-fluid levels were identified. Melanin and calcifications caused significant hypointensity. Microstructural features of eye lesions identified by MRM were confirmed by histology. CONCLUSION: This study demonstrates the potential of MRM for the visualization and differential diagnosis of intraocular lesions. At present, the narrow bore of the magnet still limits the use of this technology in humans in vivo. Further advances in ultrahigh-field MR imaging will permit visualization of tumor extent and evaluation of nonclassified intraocular structures in the near future.

Quantitative Assessment of the Impact of Blood Pulsation on Intraocular Pressure Measurement Results in Healthy Subjects

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Robert Koprowski

2017-01-01

Full Text Available Background. Blood pulsation affects the results obtained using various medical devices in many different ways. Method. The paper proves the effect of blood pulsation on intraocular pressure measurements. Six measurements for each of the 10 healthy subjects were performed in various phases of blood pulsation. A total of 8400 corneal deformation images were recorded. The results of intraocular pressure measurements were related to the results of heartbeat phases measured with a pulse oximeter placed on the index finger of the subject’s left hand. Results. The correlation between the heartbeat phase measured with a pulse oximeter and intraocular pressure is 0.69±0.26 (p<0.05. The phase shift calculated for the maximum correlation is equal to 60±40° (p<0.05. When the moment of measuring intraocular pressure with an air-puff tonometer is not synchronized, the changes in IOP for the analysed group of subjects can vary in the range of ±2.31 mmHg (p<0.3. Conclusions. Blood pulsation has a statistically significant effect on the results of intraocular pressure measurement. For this reason, in modern ophthalmic devices, the measurement should be synchronized with the heartbeat phases. The paper proposes an additional method for synchronizing the time of pressure measurement with the blood pulsation phase.

Cerebral migration of intraocular silicone oil: an MRI study

DEFF Research Database (Denmark)

Kiilgaard, Jens Folke; Milea, Dan; Løgager, Vibeke

2011-01-01

for retinal detachment. Methods: Nineteen patients included in this study were referred for silicone oil removal after uncomplicated retinal detachment surgery using internal silicone oil tamponade. Patients with a previous history of intraocular silicone oil, glaucoma or optic pit were excluded. After...

Medición de las Actitudes de los Internautas respecto a la Compra On-Line. Segmentación en Base a Actitudes y Caracterización de los Segmentos Identificados

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Lidia Andrades Caldito

2005-03-01

Full Text Available Internet ha introducido numerosos cambios en el contexto de los negocios, poniendo al alcance de las empresas recursos que posibilitan un mayor acercamiento y un mejor conocimiento de sus clientes actuales y potenciales. En el contexto del comercio electrónico, será primordial para las empresas entender a qué factores responde el comportamiento de los consumidores ya que, dada la especial naturaleza de esta modalidad de compra, cabe esperar que existan diferencias respecto a los modelos de comportamiento tradicionales. En este trabajo abordamos el análisis de los usuarios de Internet, tratando de determinar su predisposición hacia la compra on-line a través de la valoración de las actitudes que manifiestan hacia ella. En base a la estimación efectuada, se propone una segmentación de los individuos, y la caracterización de los segmentos hallados, identificando qué aspectos de la compra electrónica consideran más relevantes a la hora de seleccionar un establecimiento virtual.

Comparison of intraocular pressure measurement between rebound, non-contact and Goldmann applanation tonometry in treated glaucoma patients.

Science.gov (United States)

Vincent, Stephen J; Vincent, Roslyn A; Shields, David; Lee, Graham A

2012-01-01

To compare the intraocular pressure readings obtained with the iCare rebound tonometer and the 7CR non-contact tonometer with those measured by Goldmann applanation tonometry in treated glaucoma patients. A prospective, cross-sectional study was conducted in a private tertiary glaucoma clinic. One hundred nine (54 males : 55 females) patients including only eyes under medical treatment for glaucoma. Measurement by Goldmann applanation tonometry, iCare rebound tonometry and 7CR non-contact tonometry. Intraocular pressure. There were strong correlations between the intraocular pressure measurements obtained with Goldmann and both the rebound and non-contact tonometers (Spearman r-values ≥ 0.79, P tonometer. For the rebound tonometer, the mean intraocular pressure was slightly higher compared with the Goldmann applanation tonometer in the right eyes (P = 0.02), and similar in the left eyes (P = 0.93); however, these differences did not reach statistical significance. The Goldmann correlated measurements from the non-contact tonometer were lower than the average Goldmann reading for both right (P 0.01) eyes. The corneal compensated measurements from the non-contact tonometer were significantly higher compared with the other tonometers (P ≤ 0.001). The iCare rebound tonometer and the 7CR non-contact tonometer measure intraocular pressure in fundamentally different ways to the Goldmann applanation tonometer. The resulting intraocular pressure values vary between the instruments and will need to be considered when comparing clinical versus home acquired measurements. © 2011 The Authors. Clinical and Experimental Ophthalmology © 2011 Royal Australian and New Zealand College of Ophthalmologists.

A study of Brachytherapy for Intraocular Tumor

International Nuclear Information System (INIS)

Ji, Kwang Soo; Yoo, Dae Hyun; Lee, Sung Goo; Kim, Jae Hu; Ji, Young Hun

1996-01-01

The eye enucleation or external-beam radiation therapy that has been commonly used for the treatment of intraocular tumor have demerits of visual loss and in deficiency of effective tumor dose. Recently, brachytherapy using the plaques containing radioisotope-now treatment method that decrease the demerits of the above mentioned treatment methods and increase the treatment effect-is introduced and performed in the countries, Our purpose of this research is to design suitable shape of plaque for the ophthalmic brachytherapy, and to measure absorbed doses of Ir-192 ophthalmic plaque and thereby calculate the exact radiation dose of tumor and it's adjacent normal tissue. In order to brachytherapy for intraocular tumor, 1. to determine the eye model and selected suitable radioisotope 2. to design the suitable shape of plaque 3. to measure transmission factor and dose distribution for custom made plaques 4. to compare with the these data and results of computer dose calculation models. The result were as followed. 1. Eye model was determined as a 25 mm diameter sphere, Ir-192 was considered the most appropriate as radioisotope for brachytherapy, because of the size, half, energy and availability. 2. Considering the biological response with human tissue and protection of exposed dose, we made the plaques with gold, of which size were 15 mm, 17 mm and 20 mm in diameter, and 1.5 mm in thickness. 3. Transmission factor of plaques are all 0.71 with TLD and film dosimetry at the surface of plaques and 0.45, 0.49 at 1.5 mm distance of surface, respectively. 4. As compared the measured data for the plaque with Ir-192 seeds to results of computer dose calculation model by Gary Luxton et al. and CAP-PLAN (Radiation Treatment Planning System), absorbed doses are within ±10% and distance deviations are within 0.4 mm Maximum error is -11.3% and 0.8 mm, respectively. As a result of it, we can treat the intraocular tumor more effectively by using custom made gold plaque and Ir-192

[Contemporary possibilities of intraocular pressure measurement].

Science.gov (United States)

Hornová, J; Baxant, A

2013-10-01

Authors introduced current possibilities of measuring intraocular pressure (IOP). A list of available methods of monitoring IOP is published; contact measurement method IOP directly on the cornea, but also over upper lid, methodology of minimal contact and non-contact measurement. Following contact methods are described; former measurements of IOP by impression Schiotz tonometer and the current methodology applanation. So far as the gold standard measurement Goldmann applanation tonometer (GAT) is considered, another methodology with applanation measurements are compared: Pascal dynamic contoured tonometer (DCT ), BioResonator - resonant applanation tonometer (ART ), digital applanation tonometer Tonopen and last hit: continuous measurement of IOP by Sensimed Triggerfish. Orientation and rapid assessment is palpation pressure control over the lid and measuring by tonometer Diaton. Rebound tonometer (RBT) iCare belongs to measurements with minimal contact, no need anesthetic drops and fluorescein, therefore a self - home version of IOP measurements (Icare ONE) is developed. Non-contact measurement of IOP by different pneumotonometers is popular for screening assessment of IOP. Reichert Ocular Response Analyzer (ORA) is a non-contact applanation IOP measurement and reveals additional properties of the cornea. In the discussion of a range methodology is evaluated, the experience of other authors and their own experience is compared. For monitoring of patients is necessary to select the most suitable methodology, measure repeatedly and accurately to allow long-term monitoring of intraocular pressure.

Apparatus and method for non-contact, acoustic resonance determination of intraocular pressure

Science.gov (United States)

Sinha, D.N.; Wray, W.O.

1994-12-27

The apparatus and method for measuring intraocular pressure changes in an eye under investigation by detection of vibrational resonances therein. An ultrasonic transducer operating at its resonant frequency is amplitude modulated and swept over a range of audio frequencies in which human eyes will resonate. The output therefrom is focused onto the eye under investigation, and the resonant vibrations of the eye observed using a fiber-optic reflection vibration sensor. Since the resonant frequency of the eye is dependent on the pressure therein, changes in intraocular pressure may readily be determined after a baseline pressure is established. 3 figures.

A STUDY OF CASE SERIES OF INTRAOCULAR FOREIGN BODIES IN A TERTIARY CARE CENTER IN SOUTH INDIA

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Shilpa Y. D

2017-09-01

Full Text Available BACKGROUND Intraocular foreign bodies can cause vision threatening complication in cases of penetrating ocular injuries. Ocular injuries can occur anywhere at work place, at home, due to road traffic accidents, etc. Accidental eye injuries are common in males in work place. Awareness about using protective eye wear is required at work places where injuries are common. The aim of the study is to study the demographic profile, visual and anatomical outcome in patients presenting with posterior segment Intraocular Foreign Bodies (IOFB undergoing vitrectomy. MATERIALS AND METHODS Retrospective analysis was done on patients who underwent pars plana vitrectomy for posterior segment IOFB from March 2014 to April 2017. Complete ocular examination, B scan ultrasonography and x-ray orbit were done in all cases and retained posterior segment intraocular foreign body confirmed. Intraoperative difficulties, anatomical and visual outcome and postoperative complications were studied. RESULTS Cases with posterior segment intraocular foreign body and endophthalmitis had poor visual and anatomical outcome. Patients who underwent complete vitrectomy with 240 encirclage band with or without tamponade had better visual outcome. CONCLUSION Imaging in the injured eye is important to identify the presence of intraocular foreign body. Planning of the surgical procedure depending on the ocular condition plays a vital role in visual outcome.

Foldable micro coils for a transponder system measuring intraocular pressure

Energy Technology Data Exchange (ETDEWEB)

Ullerich, S.; Schnakenberg, U. [Technische Hochschule Aachen (Germany). Inst. of Materials in Electrical Engineering 1; Mokwa, W. [Technische Hochschule Aachen (Germany). Inst. of Materials in Electrical Engineering 1]|[Fraunhofer Inst. of Microelectronic Circuits and Systems, Duisburg (Germany); Boegel, G. vom [Fraunhofer Inst. of Microelectronic Circuits and Systems, Duisburg (Germany)

2001-07-01

A foldable transponder system consisting of a chip and a micro coil for measuring intraocular pressure continuously is presented. The system will be integrated in the haptic of a soft artificial intraocular lens. Calculations of planar micro coils with 6 mm and 10.3 mm in diameter show the limits for planar coils with an outer diameter of 6 mm. For the realisation of the transponder system a 20 {mu}m thick coil with an outer diameter of 10.3 mm, an inner diameter of 7.7 mm, 16 turns and a gap of 20 {mu}m between the windings was selected. Measurements show a good agreement between calculated and measured values. Wireless pressure measurements were carried out showing a linear behaviour of the output signal with respect to the applied pressure. (orig.)

Asociación del dolor podal con variables podométricas, de la práctica deportiva e índice de masa corporal en niños de 12 a 14 años de escuelas de formación deportiva de fútbol de la ciudad de Neiva, 2014

OpenAIRE

Ramirez Galvis, Anderson; Utria Tirado, Lorena

2016-01-01

El pie es la base de sustentación del ser humano, extremidad utilizada para diferentes actividades de locomoción, capaz de soportar todo el peso corporal incluso en acciones deportivas que implican mantenerla en buenas condiciones. La investigación en el área deportiva continuamente está tomando fuerza con miras en el mejoramiento del rendimiento y la obtención de la forma deportiva incluyendo el buen estado de todos los segmentos corporales implicados, de esta manera se realiza esta investig...

Bacterial contamination of intraocular lens surgery.

OpenAIRE

Vafidis, G C; Marsh, R J; Stacey, A R

1984-01-01

One hundred sterile intraocular lenses were placed on the external eye of 50 patients during cataract surgery. Half of the specimens were cultured for bacteria, the other half were examined under the light microscope after fixing and staining. A bacterial contamination rate of 26% was recorded. This is significantly higher than that found in conjunctival swabs (6%) or irrigation specimens (8%) taken at the same time, and higher than that recorded in a group of control lenses (15.2%) exposed t...

Los visitantes del Parc Natural de l’Alt Pirineu y la práctica de actividades recreativo-deportivas. una propuesta de segmentación

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Farías, E. I.

2014-12-01

Full Text Available In recent years there has been a large increase in the practice of recreational and sports activities in protected natural areas. As part of the planning and management of public use of these areas, is essential to a deeper understanding of the characteristics of the visitors. This study analyzes the characteristics of the different segments of visitors to Alt Pirineu Natural Park based on recreational and sports activities practiced. For this study, 1.600 surveys were conducted in 16 sampling points over a calendar year between the months of July 2010 and June 2011. In total we identified eight segments of visitors based on physical activity: walkers, recreational hikers, hikers, mountaineer, cyclists, mushroom picker, off road driver and skier. The results obtained here are discussed in terms of their possible applicability in the management of public use of this park and other protected natural areas and also for the development of management strategies and awareness campaigns aimed at different segments of visitors.En los últimos años se ha registrado un gran incremento en la práctica de las actividades recreativodeportivas en los espacios naturales protegidos. En el marco de la planificación y la gestión del uso público de este tipo de espacios, resulta fundamental profundizar en el conocimiento de las características de los visitantes. En este estudio se analiza el perfil de los diferentes segmentos de visitantes del Parc Natural de l’Alt Pirineu en base a las actividades recreativo-deportivas practicadas. Para este estudio se realizaron 1.600 encuestas en 16 puntos de muestreo, a lo largo de un año natural comprendido entre los meses de Julio de 2010 y Junio de 2011. En total se identificaron ocho segmentos de visitantes en función de la actividad física: paseantes, excursionistas, senderistas, montañistas, ciclistas, recolectores de setas, motoristas y esquiadores. Los resultados aquí obtenidos son discutidos en t

Clinical and optical intraocular performance of rotationally asymmetric multifocal IOL plate-haptic design versus C-loop haptic design.

Science.gov (United States)

Alió, Jorge L; Plaza-Puche, Ana B; Javaloy, Jaime; Ayala, María José; Vega-Estrada, Alfredo

2013-04-01

To compare the visual and intraocular optical quality outcomes with different designs of the refractive rotationally asymmetric multifocal intraocular lens (MFIOL) (Lentis Mplus; Oculentis GmbH, Berlin, Germany) with or without capsular tension ring (CTR) implantation. One hundred thirty-five consecutive eyes of 78 patients with cataract (ages 36 to 82 years) were divided into three groups: 43 eyes implanted with the C-Loop haptic design without CTR (C-Loop haptic only group); 47 eyes implanted with the C-Loop haptic design with CTR (C-Loop haptic with CTR group); and 45 eyes implanted with the plate-haptic design (plate-haptic group). Visual acuity, contrast sensitivity, defocus curve, and ocular and intraocular optical quality were evaluated at 3 months postoperatively. Significant differences in the postoperative sphere were found (P = .01), with a more myopic postoperative refraction for the C-Loop haptic only group. No significant differences were detected in photopic and scotopic contrast sensitivity among groups (P ⩾ .05). Significantly better visual acuities were present in the C-Loop haptic with CTR group for the defocus levels of -2.0, -1.5, -1.0, and -0.50 D (P ⩽.03). Statistically significant differences among groups were found in total intraocular root mean square (RMS), high-order intraocular RMS, and intraocular coma-like RMS aberrations (P ⩽.04), with lower values from the plate-haptic group. The plate-haptic design and the C-Loop haptic design with CTR implantation both allow good visual rehabilitation. However, better refractive predictability and intraocular optical quality was obtained with the plate-haptic design without CTR implantation. The plate-haptic design seems to be a better design to support rotational asymmetric MFIOL optics. Copyright 2013, SLACK Incorporated.

Comparison of hydrophobic and hydrophilic intraocular lens in preventing posterior capsule opacification after cataract surgery

OpenAIRE

Zhao, Yang; Yang, Ke; Li, Jiaxin; Huang, Yang; Zhu, Siquan

2017-01-01

Abstract Background: Posterior capsular opacification (PCO) is a common long-term complication of cataract surgery. Intraocular lens design and material have been implicated in influencing the development of PCO. This study evaluated the association of hydrophobic and hydrophilic intraocular lenses on preventing PCO. Methods: Medline, Cochrane, EMBASE, and Google Scholar databases were searched until August 3, 2016, using the following search terms: cataract, posterior capsule opacification, ...

Comparative study of intraocular pressure (IP in Bangladeshi individuals by contact and non contact technique

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Sayed Abdul Wadud

2016-07-01

Full Text Available Background: Intraocular pressure (IOP is one of the most important parameters in the diagnosis and treatment of glaucoma. Glaucoma has been established as the second leading cause of blindness. The treatment of glaucoma focuses mainly on lowering intraocular pressure (IOP. The target IOP is often set to a level 20% to 30% of IOP reduction, and consequent large IOP reduction beyond 30% or even 40% in cases of advanced glaucoma The different methods of tonometery are: Goldman Applanation tonometery, Noncontact (air-puff tonometery, Perkins tonometery, Tonopen tonometery, Transpalpebral tonometery.Objective: To determine the frequency of accuracy of intraocular pressure (IOP measured by non-contact (air puff tonometer compared with Goldmann applanation tonometer.Methods: This was a non-interventional, cross sectional study conducted at a tertiary care centre of Dhaka, Bangladesh. consecutive subjects attending the BSMMU eye OPD were included in the study. IOP was measured by non-contact (air puff tonometer and a slit lamp mounted GAT in all the subjects. The study samples were selected by convenience sampling who presented for check-up in the Eye Department of community ophthalmology, Bangabandhu Sheikh Mujib Medical University, Dhaka. Bangladesh. Results:A total of 120 eyes in 60 patients were studied. The mean age of the patients was 41.60 year. study population consisted of 24 (40 % men and 36 (60 % women. The mean intraocular pressure was 13.52 &13.72 mmHg for GAT, and 16.64 & 17.44 mmHg for Air puff respectively. The range of measurements by GAT was from 10 to 23 mmHg and by Air puff was 12 to 28mmHg. The difference between IOP measured by two instruments were statistically significant (p=0.000.Conclusion: Airpuff tonometer is quick, a non-contact method to measure intraocular pressure and is useful for screening purposes and postoperative case but the measurements should be confirmed with Goldmann applanation tonometer for accurate labelling

Intraocular surgery in a large diabetes patient population

DEFF Research Database (Denmark)

Ostri, Christoffer

2014-01-01

The prevalence of diabetes is on the increase in developed countries. Accordingly, the prevention and treatment of vision-threatening diabetic eye complications is assuming greater importance. The overall aim of this thesis is to analyse risk factors for intraocular surgery in a large diabetes po...... surgery, which can be used for preventive purposes, surgical decision-making and patient counselling....

ESTRATIFICACIÓN DEL RIESGO EN EL SÍNDROME CORONARIO AGUDO CON ELEVACIÓN DEL SEGMENTO ST / Risk stratification in acute coronary syndrome with ST-segment elevation

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Luis Alberto Rodríguez López

2010-12-01

Full Text Available Resumen Introducción y objetivos: El tamaño del infarto y la repercusión sobre la función ventricular constituyen problemas importantes para el pronóstico del paciente. El objetivo de este trabajo fue valorar los factores de mal pronóstico antes del egreso hospitalario mediante la realización de ergometría submaximal y ecocardiograma. Material y método: Se realizó una investigación descriptiva, prospectiva, con 85 pacientes con infarto que recibieron o no terapia trombolítica, en el Hospital Universitario “Celestino Hernández Robau” de Santa Clara, a los cuales se les realizó ergometría y ecocardiograma antes del egreso para detectar variables de mal pronóstico. Resultados: Predominó el sexo masculino (82,2 %, el grupo de edad de 55 años y más (47,1 %, la hipertensión arterial (80 % y el tabaquismo (75,2 %. La localización más frecuente fue la póstero-inferior (78,8 %; la fracción de eyección del ventrículo izquierdo fue mejor en los tratados con trombolíticos, y se detectaron los que tenían una mala función ventricular (10,6 %. El 74,1 % presentó clase funcional I y se identificaron 21 pacientes (24,7 % con mal pronóstico. No hubo diferencia significativa respecto a la terapia trombolítica, pero los pacientes que la recibieron presentaron un mejor comportamiento clínico. Conclusiones: Se encontraron 31 pacientes con prueba de esfuerzo positiva, de mal pronóstico, 5 de ellos con clase funcional III, los cuales presentaron también FEVI disminuida. La prueba de esfuerzo submáxima y el ecocardiograma bidimensional constituyeron herramientas de primera línea en la valoración pronóstica del paciente con IAM, por su existencia en casi todos los centros hospitalarios, bajo costo, poco o ningún riesgo y ser fácil de realizar, y reproducir. / Abstract Introduction and Objectives: Infarct size and the effect on ventricular function are significant problems for the patient's prognosis. The aim of this study was

Antireflection coatings for intraocular lenses of sapphire and fianite

Energy Technology Data Exchange (ETDEWEB)

Babin, A.A.; Konoplev, Yu.N.; Mamaev, Yu.A. [Inst. of Applied Physics, Nizhnii Novgorod (Russian Federation)] [and others

1995-10-01

Broadband antireflection coatings for intraocular lenses of sapphire and fianite are calculated and implemented practically. Their residual reflectance in the liquid with a refracting index of 1.336 is below 0.2% from each face virtually over the entire visible region. 7 refs., 2 figs., 2 tabs.

Glaucoma facomórfico y ultrabiomicroscopia

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María Cristina González González

2015-01-01

Conclusiones: La ultrabiomicroscopia es un herramienta útil ya que permite una valoración completa del segmento anterior, aun en presencia de medios opacos y ayuda a determinar la relación del cristalino con las estructuras adyacentes y el probable mecanismo del glaucoma.

Straylight from glistenings in intraocular lenses : In vitro study

NARCIS (Netherlands)

Łabuz, Grzegorz; Reus, Nicolaas J; van den Berg, Thomas J T P

PURPOSE: To assess light scattering from intraocular lenses (IOLs) with different numbers of laboratory-induced glistenings and create a model for predicting glistening effects on straylight. SETTING: Rotterdam Ophthalmic Institute, Rotterdam, the Netherlands. DESIGN: Experimental study. METHODS:

Comparison of hydrophobic and hydrophilic intraocular lens in preventing posterior capsule opacification after cataract surgery: An updated meta-analysis.

Science.gov (United States)

Zhao, Yang; Yang, Ke; Li, Jiaxin; Huang, Yang; Zhu, Siquan

2017-11-01

Posterior capsular opacification (PCO) is a common long-term complication of cataract surgery. Intraocular lens design and material have been implicated in influencing the development of PCO. This study evaluated the association of hydrophobic and hydrophilic intraocular lenses on preventing PCO. Medline, Cochrane, EMBASE, and Google Scholar databases were searched until August 3, 2016, using the following search terms: cataract, posterior capsule opacification, and intraocular lens. Eligible studies included randomized controlled trials (RCTs), retrospective, and cohort studies. Eleven studies were included in the study with a total of 889 eyes/patients. The overall analysis revealed that hydrophobic intraocular lenses were associated with lower Nd:YAG laser capsulotomy rates than hydrophilic lenses [odds ratio (OR) = 0.38, 95% confidence interval (95% CI) = 0.16-0.91, P = .029]. Hydrophobic intraocular lenses were also associated with lower subjective PCO score (diff. in means: -1.32, 95% CI = -2.39 to -0.25, P = .015) and estimated PCO score (diff. in means: -2.23; 95% CI, -3.80 to -0.68, P = .005) as compared with hydrophilic lenses. Objective PCO score was similar between lens types. (diff. in means: -0.075; 95% CI, -0.18 to 0.035; P = .182). Pooled analysis found that visual acuity was similar between hydrophobic and hydrophilic intraocular lenses (diff. in means: -0.016; 95% CI, -0.041 to 0.009, P = .208). In general, PCO scores and the rate of Nd:YAG laser capsulotomy were influenced by intraocular lens biomaterial. Lens made of hydrophobic biomaterial were overall superior in lowering the PCO score and the Nd:YAG laser capsulotomy rate, but not visual acuity.

Brachytherapy with cobalt plaques in the conservative treatment of intraocular tumors. The Brazilian experience

International Nuclear Information System (INIS)

Pellizzon, Antonio Cassio Assis; Trippe, N.; Novaes, P.E.; Ferrigno, R.; Fogarolli, R.C.; Maia, M.A.C.; Salvajoli, J.V.; Baraldi, H.E.; Chojniak, M.M.; Erwene, C.M.

1996-01-01

Purpose/Objective: To show the retrospective results of intraocular tumors, including uveal melanomas and retinoblastomas treated by exclusive brachytherapy with cobalt plaques. The goal was to keep the vision function with not compromising the chance of cure. Materials and Methods: From December 1989 to December 1993, 76 cases of intraocular tumors, being 56 adult patients with uveal melanomas and 20 children with retinoblastoma, were treated with exclusive intraocular brachytherapy through cobalt plaques. The prescribed dose was 40 Gy, calculated at the apex of the lesion for retinoblastomas and 100 Gy for melanomas. The selection criteria included those introcular lesions with diameter until 15 mm. Results: With the minimum follow up of 24 months, of the 56 patients with uveal melanomas, 41 (73,3%) had their vision preserved with no evidence of disease, while 15 (26,4%) had local failure and were underwent to enucleation. With the medium follow up of 27 months, of the 20 patients with retinoblastoma, 17 (85,5%) had their vision preserved with no evidence of disease, while 3 (15%) had local failure and were underwent to enucleation. All patients are alive with no evidence of systemic disease. Conclusion: When well indicated, the conservative treatment of intraocular tumors with brachytherapy is a good alternative to enucleation and must be done by a multidisciplinary and well trained medical team

Corn silk aqueous extracts and intraocular pressure of systemic and non-systemic hypertensive subjects.

Science.gov (United States)

George, Gladys O; Idu, Faustina K

2015-03-01

Hypotensive properties have been attributed to the stigma/style of Zea mays L (corn silk). Although the effect of corn silk extract on blood pressure has been documented in animal studies, we are not aware of any study on its effect on human blood pressure and intraocular pressure. A randomised study was carried out on the effect of water only, masked doses of corn silk aqueous extract (60, 130, 192.5 and 260 mg/kg body weight) on intraocular pressure and blood pressure of 20 systemic and 20 non-systemic hypertensive subjects. Intraocular pressure and blood pressure were measured at baseline and every hour for eight hours after administering water or a masked dose of corn silk aqueous extract. Each dose was administered at two-week intervals to each subject in the two study groups. The results showed that the last three doses of corn silk aqueous extract gave a statistically significant reduction (p Corn silk aqueous extract has a lowering effect on intraocular pressure in systemic and non-systemic hypertensive subjects. This may have resulted from the fall in blood pressure that is due to potassium-induced natriuresis and diuresis caused by the high potassium content in the high doses of the corn silk extract. © 2015 The Authors. Clinical and Experimental Optometry © 2015 Optometry Australia.

Socioeconomic and psychological impact of treatment for unilateral intraocular retinoblastoma.

Science.gov (United States)

Soliman, S E; Dimaras, H; Souka, A A; Ashry, M H; Gallie, B L

2015-06-01

To identify the socioeconomic and psychosocial impacts of clinical treatment decisions for advanced unilateral intraocular retinoblastoma. Retrospective observational case series. institutional study at Alexandria Main University Hospital. records of 66 unilateral retinoblastoma cases treated from May 2005 to May 2013 were retrospectively reviewed. Sixty cases were eligible (International Intraocular Retinoblastoma Classification [IIRC] group C, D or E). two treatment groups were compared: enucleation vs. salvage treatment. Salvage treatment eyes were further subdivided based on IIRC group. Six socioeconomic parameters (financial burden, financial impact, psychological, social, medical and tumor impacts) were scored. Parameter scores ranged from 0 to 3, for overall score range 0 (no adverse impact) to 18 (severe adverse impact). derived Socioeconomic scores were correlated with treatment and outcomes. The enucleation group (28 eyes) had a median overall Socioeconomic score of 4/18, significantly lower than the salvage treatment group (32 eyes), median score 11/18 (PSocioeconomic score varied with IIRC group. Attempted eye salvage failed in 25 children, due to uncontrolled tumor (44%) and socioeconomic impact of cumulative therapies (56%). Treatment duration and Socioeconomic score were higher for the 5 children in the salvage treatment group who developed metastatic disease compared to those without metastasis (Psocioeconomic and psychosocial impacts of attempted ocular salvage for unilateral intraocular retinoblastoma are severe, in comparison to primary enucleation. Primary enucleation is a good treatment for unilateral retinoblastoma. Copyright © 2015 Elsevier Masson SAS. All rights reserved.

The Advanced Glaucoma Intervention Study (AGIS): 7. The relationship between control of intraocular pressure and visual field deterioration.The AGIS Investigators.

Science.gov (United States)

2000-10-01

To investigate the association between control of intraocular pressure after surgical intervention for glaucoma and visual field deterioration. In the Advanced Glaucoma Intervention Study, eyes were randomly assigned to one of two sequences of glaucoma surgery, one beginning with argon laser trabeculoplasty and the other trabeculectomy. In the present article we examine the relationship between intraocular pressure and progression of visual field damage over 6 or more years of follow-up. In the first analysis, designated Predictive Analysis, we categorize 738 eyes into three groups based on intraocular pressure determinations over the first three 6-month follow-up visits. In the second analysis, designated Associative Analysis, we categorize 586 eyes into four groups based on the percent of 6-month visits over the first 6 follow-up years in which eyes presented with intraocular pressure less than 18 mm Hg. The outcome measure in both analyses is change from baseline in follow-up visual field defect score (range, 0 to 20 units). In the Predictive Analysis, eyes with early average intraocular pressure greater than 17.5 mm Hg had an estimated worsening during subsequent follow-up that was 1 unit of visual field defect score greater than eyes with average intraocular pressure less than 14 mm Hg (P =.002). This amount of worsening was greater at 7 years (1.89 units; P <.001) than at 2 years (0.64 units; P =.071). In the Associative Analysis, eyes with 100% of visits with intraocular pressure less than 18 mm Hg over 6 years had mean changes from baseline in visual field defect score close to zero during follow-up, whereas eyes with less than 50% of visits with intraocular pressure less than 18 mm Hg had an estimated worsening over follow-up of 0.63 units of visual field defect score (P =.083). This amount of worsening was greater at 7 years (1.93 units; P <.001) than at 2 years (0.25 units; P =.572). In both analyses low intraocular pressure is associated with reduced

Delivery of Intraocular Triamcinolone Acetonide in the Treatment of Macular Edema

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Brent Siesky

2012-03-01

Full Text Available Macular edema (ME is one of the eventual outcomes of various intraocular and systemic pathologies. The pathogenesis for ME is not yet entirely understood; however, some of the common risk factors for its development have been identified. While this investigation will not discuss the numerous etiologies of ME in detail, it appraises the two most widely studied delivery modalities of intraocular corticosteroids in the treatment of ME—intravitreal injection (IVI and sub-Tenon’s infusion (STI. A thorough review of the medical literature was conducted to identify the efficacy and safety of IVI and STI, specifically for the administration of triamcinolone acetonide (TA, in the setting of ME in an attempt to elucidate a preferred steroid delivery modality for treatment of ME.

Correspondencias múltiples entre índices morfológicos cefálicos y postcefálicos en aborígenes del Gran Chaco Sudamericano

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Colantonio, Sonia Edith

2002-01-01

Full Text Available Los comportamientos correlativos de los índices cefálicos y postcefálicos en los análisis de relaciones intergrupales no han sido suficientemente explorados hasta hoy. La escasez de datos de ambos segmentos corporales ha limitado este tipo de estudios. A la vez, otras estimaciones de la "forma" mediante ajustes del "tamaño" han sido propuestas, dándose por sentada su superioridad al uso de los índices. En este ensayo se analizan la correspondencia entre formas y la eficiencia discriminante de los índices, aprovechando los datos de la colección Vellard que comprende 1734 aborígenes provenientes de 12 grupos étnicos del Gran Chaco Sudamericano. Se empleó para ello el Análisis de Homogeneidad (HOMALS, mediante el cual se calcularon los vectores propios y los "pesos" tanto de las variables (índices cuanto de los grupos en las dimensiones principales de la variación, representando gráficamente su ubicación en el sistema coordenado de las mismas. Los resultados muestran similares relaciones entre las formas de la cabeza en hombres y en mujeres, pero en éstas hay una neta independencia entre las categorías de la porción neural y las de la facial. La mayor diferenciación morfológica de los chaquenses se registra en esas regiones cefálicas, mientras que a nivel del segmento postcefálico las etnias son más semejantes. Las relaciones morfológicas interétnicas son diferentes según el sexo considerado. En el interior de cada sexo, la topología obtenida es idéntica ya se tome en cuenta solamente la cabeza o ésta conjuntamente con el cuerpo.

Evaluación de la accesibilidad para personas con discapacidad en los servicios turísticos de las Llanuras del Norte de Costa Rica

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Grace Damazio A.

2009-01-01

Full Text Available Costa Rica, al igual que otros países que se abren al mercado mundial del turismo, debe optar por nuevos y crecientes segmentos de mercado. La innovación y la especialización son parte fundamental de una nueva visión de la oferta de servicios turísticos competitivos. El desafío de incorporar el turismo para todos o lo que se conoce como turismo para personas con necesidades especiales (discapacidad, tercera edad, etc., se encuentra entre las opciones de mayor aceptación por parte de quienes, con visión de futuro, se replantean su oferta. El presente artículo muestra los resultados de una evaluación de la accesibilidad para personas con discapacidad en los servicios turísticos de las Llanuras del Norte de Costa Rica. En esta investigación se procedió a conocer si los servicios turísticos de las Llanuras del Norte están preparados para recibir a personas con discapacidad y cuánto es el interés que demuestra el empresario por captar la atención de este mercado internacional de turistas. Se trabajó con 120 servicios turísticos: 15 en Caño Negro y Los Chiles, 68 en La Fortuna y 37 en Sarapiquí. Los resultados muestran que los servicios turísticos analizados no cumplen con lo dispuesto en la Ley N.° 7600 y su Reglamento, y que el 61% de los empresarios tienen interés en realizar inversiones en acceso físico y considerar este creciente segmento de mercado.

Effect of intravenous metoclopramide on intraocular pressure: A prospective, randomized, double-blind, placebo-controlled study

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Sudheera K

2008-01-01

Full Text Available Background: Prevention of rise in intraocular pressure (IOP is essential in patients undergoing surgery for perforated eye injuries. Metoclopramide, a prokinetic agent, is commonly used to hasten gastric emptying in emergency surgeries. Aim: To study the change in IOP after intravenous metoclopramide and to study the influence of metoclopramide on change in IOP after succinylcholine and tracheal intubation. Settings and Design: A randomized, double-blind, placebo-controlled study of 60 patients undergoing non-ophthalmic elective surgery. Materials and Methods: Sixty American Society of Anesthesiologists (ASA I adult patients were randomly assigned to receive normal saline (Group C or metoclopramide 10 mg (Group M 30 min before the induction of anesthesia. Thiopentone was used for induction and succinylcholine for tracheal intubation. Intraocular pressure was measured in both the eyes pre and post drug treatment and succinylcholine and tracheal intubation using Perkins applanation tonometer. Statistical Analysis: Student′s t-test and repeated measures ANOVA were used. A P value < 0.05 was considered as significant. Results: Intraocular pressure was consistently lower in Group M than in Group C after the test drug, though the difference was not statistically significant. Intraocular pressure decreased significantly after administration of thiopentone and increased significantly in Groups C and M after tracheal intubation ( P < 0.01. Intraocular pressure was comparable between the groups at all the times. Conclusions: Metoclopramide does not cause a clinically significant change in IOP nor does it influence the changes in IOP during anesthesia and tracheal intubation. Metoclopramide shows a trend towards decrease in IOP, though clinically insignificant. Therefore metoclopramide can be used to promote gastric emptying in patients with perforated eye injury.

Neodymium:YAG laser cutting of intraocular lens haptics.

Science.gov (United States)

Gorn, R A; Steinert, R F

1985-11-01

Neodymium:YAG laser cutting of polymethylmethacrylate and polypropylene anterior chamber and posterior chamber intraocular lens haptics was studied in terms of ease of transection and physical structure of the cut areas as seen by scanning electron microscopy. A marked difference was discovered, with the polymethylmethacrylate cutting easily along transverse planes, whereas the polypropylene resisted cutting along longitudinal fibers. Clinical guidelines are presented.

Innovando los estudios de mercado de los quesos artesanales. El valor simbólico del queso de poro

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Fernando Cervantes Escoto

2017-01-01

Full Text Available Objetivo: proponer una innovadora forma de analizar el segmento de consumidores par-tiendo del análisis del valor simbólico del queso de poro (originario del estado de Ta-basco, México para diseñar una estrategia de marketing fundamentada en las representa-ciones sociales evocadas por los consumido-res. Metodología: se recurrió a un análisis le-xicométrico por medio del cual se detectaron las principales representaciones. Posteriormen-te, mediante un análisis K.A.P. (Knowledge, Atti-tudes, Practices se llevó a cabo un ejercicio de asociación entre el grado de conocimiento evaluado y las actitudes y prácticas de los con-sumidores. Resultados: se encontró que las principales representaciones sociales asocia-das al valor simbólico del queso de poro son: la percepción sensorial y elementos vincula-dos a la identidad de los consumidores como puede ser la cultura. Limitaciones: se descubrió que el conocimiento no es un factor determi-nante de las actitudes y prácticas. Conclusiones: que para el diseño de una campaña de marke-ting se debe centrar la estrategia en la buena per-cepción y aceptación sensorial que tienen los consumidores del queso, así como en algunos elementos vinculados a la identidad como son el territorio de origen y la cultura.

Primary intraocular chondrosarcoma in a dog

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E. Perlmann

2013-12-01

Full Text Available A five-year-old male Cocker Spaniel was presented for evaluation of the right eye due to discomfort, abundant purulent discharge and progressive enlargement of the eyeball. The owner revealed that the right eye has appeared to be inflamed and smaller then the left eye for years. Ophthalmic examination revealed corneal perforation, buphthalmia and conjuctival hyperemia. Enucleating was performed due to signs of endophthalmitis and ocular discomfort. Histopathology revealed a multilobulated proliferation of chondrocytes producing hyaline cartilage with occasional pleomorphism and binucleate cells. A diagnosis of primary intraocular chondrosarcoma was done.

Cryopreserved tracheal segments: a new tool for bench surgical training in thoracic surgery Segmentos criopreservados de traqueia: uma nova ferramenta para auxiliar o treinamento na cirurgia torácica

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Avelina Sotres-Vega

2012-08-01

Full Text Available PURPOSE: To present a new low-cost high fidelity bench model of cryopreserved trachea that can be used to learn surgical skills from medical students to cardiothoracic surgery fellows. METHODS: Ten tracheas were harvested from ten non-trachea related research dogs at the moment of euthanasia. Each trachea was trimmed in six or seven rings segments. They were cryopreserved and stored during 60 days. The day programmed for surgical skills practice, they were thawed to room temperature. RESULTS: Forty segments have been used. After defrosting, all the segments kept their normal anatomic shape and structural integrity. Two incisions were made on every tracheal segment and sutured with running or separate stitches with 5-0 polypropilene. There were no complications such as cartilage ruptures, neither tears on the mucosae, the cartilages nor the membranous posterior membrane. CONCLUSIONS: The cryopreserved trachea is a high fidelity, practical, reproducible, portable, low-cost bench model. It allows cardiothoracic fellows to learn how to handle a trachea, as well as to perfect their surgical and suture abilities before applying them on a real patient's trachea.OBJETIVO: Apresentar novo modelo de traquéia criopreservada de baixo custo e alta fidelidade que pode ser usado tanto por estudantes de medicina como por cirurgiões cardiotorácicos no aprendizado e desenvolvimento de suas habilidades cirúrgicas. MÉTODOS: Foram coletados amostras de dez traquéias de dez cães utilizados para pesquisa após a eutanásia. Cada segmento de traquéia foi dividida em seis ou sete anéis, criopreservadas e armazenadas durante 60 dias. No dia programado para a prática cirúrgica os segmentos foram descongelados a temperatura ambiente. RESULTADOS: Foram utilizados 40 segmentos no estudo. Após o descongelamento todos os segmentos mantiveram sua forma anatômica e sua integridade estrutural. Foram realizadas duas incisões em cada segmento traqueal que foram

Comparison of the Retinal Straylight in Pseudophakic Eyes with PMMA, Hydrophobic Acrylic, and Hydrophilic Acrylic Spherical Intraocular Lens

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Ya-wen Guo

2014-01-01

Full Text Available Purpose. To investigate the intraocular straylight value after cataract surgery. Methods. In this study, 76 eyes from 62 patients were subdivided into three groups. A hydrophobic acrylic, a hydrophilic acrylic, and a PMMA IOL were respectively, implanted in 24 eyes, 28 eyes, and 24 eyes. Straylight was measured using C-Quant at 1 week and 1 month postoperatively in natural and dilated pupils. Results. The hydrophilic acrylic IOLs showed significantly lower straylight values than those of the hydrophobic acrylic IOLs in dilated pupils at 1 week and 1 month after surgery (P0.05. Moreover, no significant difference was found in straylight between natural and dilated pupils in each group at 1 week and 1 month postoperatively (P>0.05. Conclusions. Although the hydrophobic acrylic IOL induced more intraocular straylight, straylight differences among the 3 IOLs were minimal. Pupil size showed no effect on intraocular straylight; the intraocular straylight was stable 1 week after surgery.

Intraocular 6-hydroxydopamine prevents the persistent estrus induced by continuous light.

Science.gov (United States)

Shimizu, K; Hokano, M

1985-01-15

Following the intraocular injection of 6-hydroxydopamine, which can destroy the retinal dopaminergic neurons, female rats showed a normal estrous cycle in LD 12:12 but not a persistent estrus in continuous light.

Effect of hemodialysis on intraocular lens power calculation.

Science.gov (United States)

Çalışkan, Sinan; Çelikay, Osman; Biçer, Tolga; Aylı, Mehmet Deniz; Gürdal, Canan

2016-01-01

To evaluate changes in ocular biometric parameters after hemodialysis (HD) in patients with end-stage renal disease (ESRD). Forty eyes of 40 patients undergoing HD were included in this cross-sectional study. Keratometry (K) readings, white-to-white (WTW) distance, central corneal thickness (CCT), anterior chamber depth (ACD), pupil diameter, lens thickness (LT), axial length (AL), and intraocular lens (IOL) power calculation were measured with Lenstar LS 900 (Haag Streit AG, Koeniz, Switzerland) before and after hemodialysis. Intraocular pressure (IOP) was measured with a non-contact tonometer (Tonopachy NT-530P, Nidek Co., LTD, Tokyo, Japan). Main outcomes were changes in biometric parameters after HD. Reliability of the measurements (intraclass correlation coefficients (ICCs)) and the effect size (Cohen's d) were also calculated. Mean difference in AL before and after HD was -0.041 ± 0.022 mm with ICCs > 0.90 (p  0.90 (p = 0.041 and Cohen's d = 0.20). Hemodialysis had no significant effect on K readings, WTW distance, CCT, ACD, LT, or IOP. Axial length and pupil diameter increase after HD with small effect size, while HD does not significantly affect IOL power calculations.

Associação entre dois diferentes tipos de estrangulamento com a variação da pressão intraocular em atletas de jiu-jitsu Association between two different types of strangling and intraocular pressure variation in jiu-jitsu athletes

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Marinho Jorge Scarpi

2009-06-01

Full Text Available OBJETIVO: Verificar a associação entre dois diferentes tipos de estrangulamento com a variação da pressão intraocular em atletas de jiu-jitsu. MÉTODO: Estudo observacional em grupo de 9 atletas de jiu-jitsu, com mínimo 6 meses de treinamento, sexo masculino, idades entre 20 e 30 anos, sem presença de lesões físicas e do bulbo ocular. Buscou-se associação entre a variação da pressão intraocular e os estrangulamentos Frontal da Guarda (E1 e Frontal da Montada (E2. A pressão intraocular foi determinada com o tonômetro de Perkins, inicialmente sem que o atleta tivesse realizado atividade física nas 24 horas antecedentes e após cada golpe. Realizou-se medidas da pressão intraocular por 12 minutos, uma a cada 3 minutos de recuperação (R1; R2; R3; R4, com o indivíduo deitado. Como procedimento estatístico foi empregado o teste ANOVA e o pós-teste de Bonferroni. RESULTADOS: Ocorreu redução significativa da pressão intraocular em ambos os olhos durante a situação E2 comparada a E1 em todos os momentos da aferição de recuperação: R1 (OD: 8,22 ± 1,39 vs.11,33 ± 2,00 / OE: 8,55 ± 1,23 vs. 11,88 ± 1,90, R2 (OD: 8,44 ± 1,87 vs.10,22 ± 2,53 / OE: 9,00 ± 1,80 vs. 10,44 ± 2,35, R3 (OD: 8,44 ± 1,74 vs.9,78 ± 2,54 / OE: 8,55 + 1,42 vs. 10,33 ± 1,93 todos com pPURPOSE: To verify the association between two different types of strangling with intraocular pressure variation in jiu-jitsu athletes. METHODS: An observational study was performed on 9 athletes of jiu-jitsu, with at least 6 month of training, male, aged 20 to 30 years, without any physical and eyeball lesions. Associations between intraocular pressure and Cross Choke from the guard strangling (E1, and E2 - Cross Choke from mount strangling were gotten. Intraocular pressure was determined by using Perkins tonometer, at first in the absence of physical exercise over the last 24 hours and after each strangling. Then it was carried out the intraocular pressure

Intermediate-term and long-term outcome of piggyback drainage: connecting glaucoma drainage device to a device in-situ for improved intraocular pressure control.

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Dervan, Edward; Lee, Edward; Giubilato, Antonio; Khanam, Tina; Maghsoudlou, Panayiotis; Morgan, William H

2017-11-01

This study provides results of a treatment option for patients with failed primary glaucoma drainage device. The study aimed to describe and evaluate the long-term intraocular pressure control and complications of a new technique joining a second glaucoma drainage device directly to an existing glaucoma drainage device termed 'piggyback drainage'. This is a retrospective, interventional cohort study. Eighteen eyes of 17 patients who underwent piggyback drainage between 2004 and 2013 inclusive have been studied. All patients had prior glaucoma drainage device with uncontrolled intraocular pressure. The piggyback technique involved suturing a Baerveldt (250 or 350 mm) or Molteno3 glaucoma drainage device to an unused scleral quadrant and connecting the silicone tube to the primary plate bleb. Failure of intraocular pressure control defined as an intraocular pressure greater than 21 mmHg on maximal therapy on two separate occasions or further intervention to control intraocular pressure. The intraocular pressure was controlled in seven eyes (39%) at last follow-up with a mean follow-up time of 74.2 months. The mean preoperative intraocular pressure was 27.1 mmHg (95% confidence interval 23.8-30.3) compared with 18.4 mmHg (95% confidence interval 13.9-22.8) at last follow-up. The mean time to failure was 57.1 months (95% confidence interval 32.2-82), and the mean time to further surgery was 72.3 months (95% confidence interval 49.9-94.7). Lower preoperative intraocular pressure was associated with longer duration of intraocular pressure control (P = 0.048). If the intraocular pressure was controlled over 2 years, it continued to be controlled over the long term. Two eyes (11%) experienced corneal decompensation. Piggyback drainage represents a viable surgical alternative for the treatment of patients with severe glaucoma with failing primary glaucoma drainage device, particularly in those at high risk of corneal decompensation. © 2017 Royal Australian and New Zealand

Human Intraocular Filariasis Caused by Dirofilaria sp. Nematode, Brazil

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Diniz, Daniel G.; Dantas-Torres, Filipe; Casiraghi, Maurizio; de Almeida, Izabela N.F.; de Almeida, Luciana N.F.; Nascimento dos Santos, Jeannie; Furtado, Adriano Penha; Sobrinho, Edmundo F. de Almeida; Bain, Odile

2011-01-01

A case of human intraocular dirofilariasis is reported from northern Brazil. The nematode was morphologically and phylogenetically related to Dirofilaria immitis but distinct from reference sequences, including those of D. immitis infesting dogs in the same area. A zoonotic Dirofilaria species infesting wild mammals in Brazil and its implications are discussed. PMID:21529396

Branch retinal artery occlusion post-penetrating globe injury with intraocular foreign body.

Science.gov (United States)

Nagpal, Manish; Chaudhary, Pranita; Jain, Ashish

2018-01-01

Intraocular foreign body (IOFB) in cases of penetrating eye injury accounts for an important indication of vitreoretinal intervention following ocular trauma. Vascular occlusion as a complication of IOFB is rare. Here we present a case of a 34-year-old male with post-traumatic cataract and an intraocular metallic foreign body (IOFB) lodged in the superficial layers of the retina inferotemporal to the disc, causing an inferotemporal branch retinal artery occlusion. The case was managed by lensectomy with pars plana vitrectomy and IOFB removal followed by a second procedure of secondary IOL implantation. Final best-corrected visual acuity improved to 6/24. This case highlights an unusual sequelae following penetrating ocular trauma.

Branch retinal artery occlusion post-penetrating globe injury with intraocular foreign body

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Manish Nagpal

2018-01-01

Full Text Available Intraocular foreign body (IOFB in cases of penetrating eye injury accounts for an important indication of vitreoretinal intervention following ocular trauma. Vascular occlusion as a complication of IOFB is rare. Here we present a case of a 34-year-old male with post-traumatic cataract and an intraocular metallic foreign body (IOFB lodged in the superficial layers of the retina inferotemporal to the disc, causing an inferotemporal branch retinal artery occlusion. The case was managed by lensectomy with pars plana vitrectomy and IOFB removal followed by a second procedure of secondary IOL implantation. Final best-corrected visual acuity improved to 6/24. This case highlights an unusual sequelae following penetrating ocular trauma.

A randomised comparative study of the effect of Airtraq optical laryngoscope vs. Macintosh laryngoscope on intraocular pressure in non-ophthalmic surgery

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Bikramjit Das

2016-02-01

Full Text Available BACKGROUND: We compared intraocular pressure changes following laryngoscopy and intubation with conventional Macintosh blade and Airtraq optical laryngoscope. METHODS: Ninety adult patients were randomly assigned to study group or control group. Study group (n = 45 - Airtraq laryngoscope was used for laryngoscopy. Control group (n = 45 - conventional Macintosh laryngoscope was used for laryngoscopy. Preoperative baseline intraocular pressure was measured with Schiotz tonometer. Laryngoscopy was done as per group protocol. Intraocular pressure and haemodynamic parameters were recorded just before insertion of the device and subsequently three times at an interval of one minute after insertion of the device. RESULTS: Patient characteristics, baseline haemodynamic parameters and baseline intraocular pressure were comparable in the two groups. Following insertion of the endotracheal tube with Macintosh laryngoscope, there was statistically significant rise in heart rate and intraocular pressure compared to Airtraq group. There was no significant change in MAP. Eight patients in Macintosh group had tongue-lip-dental trauma during intubation, while only 2 patients received upper airway trauma in Airtraq group. CONCLUSION: We conclude that Airtraq laryngoscope in comparison to Macintosh laryngoscope results in significantly fewer rises in intraocular pressure and clinically less marked increase in haemodynamic response to laryngoscopy and intubation.

Avaliação da sensibilidade ao contraste e da estereopsia em pacientes com lente intra-ocular multifocal Contrast sensitivity and stereopsis in pseudophakic patients with multifocal intraocular lens

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Filipe de Oliveira

2005-08-01

Full Text Available OBJETIVO: Avaliar a sensibilidade ao contraste e a acuidade estereoscópica em pacientes pseudofácicos, que receberam implante bilateral de lente intra-ocular multifocal. MÉTODOS: Prospectivamente foram realizados testes de sensibilidade ao contraste com o uso da tabela Pelli-Robson e teste de acuidade estereoscópica com emprego do Titmus Stereo Test, em 20 pacientes com implante bilateral de lente intra-ocular multifocal Acrysof Restor®, no pós-operatório de 1 a 2 meses e sem uso de qualquer correção óptica. RESULTADOS:O teste de sensibilidade ao contraste binocular demonstrou que 6 pacientes (30% apresentaram 1,80 unid. log, 13 (65% 1,65 e 1 (5% 1,50. No teste monocular, ocorreram as seguintes respostas: 17 pacientes (85% 1,65 unid. log e 3 (15% 1,50 para o teste do olho direito. O teste do olho esquerdo mostrou que 16 pacientes (80% apresentaram 1,65 unid. log e 4 (20% 1,50. A média e o desvio-padrão da sensibilidade ao contraste testada binocularmente foi 1,69 (±0,08, ao passo que monocularmente foi 1,63 (±0,05 para OD e 1,62 (±0,06 para OE. O teste de acuidade estereoscópica revelou que 12 pacientes (60% obtiveram 40", 6 (30% 50" e 2 (10% 60", com média de 45" e desvio-padrão de ±6,88". CONCLUSÃO: A lente intra-ocular empregada no estudo, proporcionou resultados de sensibilidade ao contraste e acuidade estereoscópica compatíveis e de acordo com critérios de normalidade estabelecidos anteriormente por outros estudos em grupos de pacientes fácicos e pseudofácicos, e portanto, impacto positivo na funcionalidade visual.PURPOSE: To evaluate the contrast sensitivity and stereopsis tests in patients who underwent bilateral implantation of multifocal intraocular lens. METHODS: Tests of contrast sensitivity using the Pelli-Robson chart and stereopsis evaluation with the Titmus Stereo Test were performed in 20 patients 30-60 days after the bilateral implantation of Acrysof Restor® multifocal intraocular lens. RESULTS: The

Role of light and the circadian clock in the rhythmic oscillation of intraocular pressure: Studies in VPAC2 receptor and PACAP deficient mice.

Science.gov (United States)

Fahrenkrug, Jan; Georg, Birgitte; Hannibal, Jens; Jørgensen, Henrik Løvendahl

2018-04-01

The intraocular pressure of mice displays a daily rhythmicity being highest during the dark period. The present study was performed to elucidate the role of the circadian clock and light in the diurnal and the circadian variations in intraocular pressure in mice, by using animals with disrupted clock function (VPAC2 receptor knockout mice) or impaired light information to the clock (PACAP knockout mice). In wildtype mice, intraocular pressure measured under light/dark conditions showed a statistically significant 24 h sinusoidal rhythm with nadir during the light phase and peak during the dark phase. After transfer of the wildtype mice into constant darkness, the intraocular pressure increased, but the rhythmic changes in intraocular pressure continued with a pattern identical to that obtained during the light/dark cycle. The intraocular pressure in VPAC2 receptor deficient mice during light/dark conditions also showed a sinusoidal pattern with significant changes as a function of a 24 h cycle. However, transfer of the VPAC2 receptor knockout mice into constant darkness completely abolished the rhythmic changes in intraocular pressure. The intraocular pressure in PACAP deficient mice oscillated significantly during both 24 h light and darkness and during constant darkness. During LD conditions, the amplitude of PACAP deficient was significantly lower compared to wildtype mice, resulting in higher daytime and lower nighttime values. In conclusion, by studying the VPAC2 receptor knockout mouse which lacks circadian control and the PACAP knockout mouse which displays impaired light signaling, we provided evidence that the daily intraocular pressure rhythms are primarily generated by the circadian master clock and to a lesser extent by environmental light and darkness. Copyright © 2018 Elsevier Ltd. All rights reserved.

La diferencia sexual y el trayecto del deseo femenino en Drácula de Bram Stoker. La revelación de un deseo "consumido"

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Laura Antón Sánchez

2011-08-01

Full Text Available El motivo de análisis que he escogido para trazar un posible itinerario en la historia del cine es la representación simbólica de la sexualidad y su expresión a través de la figura narrativa del doble en Drácula de Bram Stoker (Francis Ford Coppola, 1992, el film que tomó como pre-texto la revisión del mito literario y fílmico; y que ha impulsado una lectura retroactiva del mismo en el discurso teórico. Mi lectura no se centra en la representación de la sexualidad masculina sino también en la femenina, reprimida en la lectura del discurso teórico sobre el arquetipo, más allá de un beso del vampiro, el mordisco erótico, que cada vez se hace más visible en el trayecto audiovisual del mito. ¿Cómo se simboliza la diferencia sexual?, ¿cómo se representa el deseo femenino?; en definitiva: ¿qué simboliza, desde esta perspectiva, Drácula? Desde esta perspectiva, mi análisis del film se detendrá en segmentos nucleares del relato: secuencia prólogo, secuencia 1, secuencia clímax y su secuencia epílogo para concluir con un seguimiento del arquetipo femenino en algunas de las versiones fílmicas más admiradas del mito literario. 

Impacto de la reforma del sistema de seguridad social sobre la equidad en los servicios de salud en Colombia

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Céspedes-Londoño Juan Eduardo

2002-01-01

Full Text Available Para evaluar el impacto sobre la equidad en el acceso y en la utilización de servicios de salud del nuevo Sistema General de Seguridad Social en Salud Colombiano (SGSSS, se compararon dos cortes transversales de la población, antes (1993 y después (1997 de promulgada la Ley 100, de 1993, que lo creó, con respecto a dos indicadores de equidad: las curvas (CC e índices de concentración (IC correspondientes a la distribución del aseguramiento y a la utilización de servicios. Entre 1993 y 1997, el IC en el aseguramiento se redujo a la mitad, del 0,34 al 0,17; simultáneamente, la cobertura del SGSSS se incrementó del 23% al 57%, sobretodo entre los segmentos más pobres de la población, donde pasó del 3,1% al 43,7%, como resultado de los subsidios otorgados por los gobiernos locales. Los IC en la utilización de servicios variaron muy poco. Adicionalmente, se detectó una mayor prevalencia de enfermedad y utilización de servicios entre los asegurados, debido a selección sesgada de riesgos y riesgo moral. Estos resultados sugieren un impacto positivo del SGSSS sobre las inequidades en el acceso al aseguramiento; sin embargo, no se evidenció un impacto claro sobre la equidad en la utilización final de servicios.

Fratura tipo explosão da coluna torácica e lombar: correlação entre o segmento biomecânico sagital acometido e as alterações estruturais da vértebra fraturada

OpenAIRE

Silva,Matheus Luís da; Tisot,Rodrigo Arnold; Vieira,Juliano Silveira Luiz; Santos,Renato Tadeu dos; Tisot,Orley Fauth

2013-01-01

OBJETIVO: Analisar as fraturas tipo explosão da coluna torácica e lombar e fazer a correlação entre o segmento biomecânico sagital acometido e as alterações estruturais da vértebra fraturada. MÉTODOS: Estudo retrospectivo de 72 pacientes com fraturas tipo explosão da coluna torácica e lombar. O estreitamento do canal vertebral, o colapso vertebral e a cifose local foram avaliados em três segmentos distintos: torácico, transição toracolombar e lombar. RESULTADOS: Houve diferença estatística si...

Efectividad del Nd- Yag láser en la capsulotomía posterior Effectiveness of Nd-Yag laser in posterior capsulotomy

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Alina Pedroso Llanes

2004-06-01

Full Text Available Este trabajo se propuso determinar la efectividad del neodimio YAG láser (Nd-YAG láser en la realización de capsulotomía posterior a 150 pacientes (ojos operados de catarata senil o presenil en el centro de Microcirugía Ocular en Serie del Hospital Oftalmológico Docente "Ramón Pando Ferrer" en el período comprendido de febreroa diciembre de 1999. En este grupo se analizaron como variables la edad, sexo, raza, implante o no de lente intraocular, tipo de opacidad de cápsula posterior, agudeza visual con corrección pre y postratamiento, complicaciones encontradas, comportamiento de la presión intraocular, así como la energía empleada para realizar dicho proceder. Estos datos se analizaron a través de tablas de contingencias Chi cuadrado. Como resultado de esta investigación se encontró que el láser es altamente efectivo para el mejoramiento de la agudeza visual en los pacientes afectados de catarata secundaria (74,7 %. Se observó además aumento transitorio de la presión intraocular en las dos primeras horas posteriores al láser (60,7 %, y no se encontró ninguna complicación que afectara la visión de los ojos estudiadosThe aim of this paper was to determine the effectiveness of neodymium YAG laser (Nd-YAG laser on performing the posterior capsulotomy in 150 patients (eyes operated on of senile or presenile cataract at the Center of Serial Ocular Microsurgery (CSOM of "Ramón Pando Ferrer" Ophthalmological Teaching Hospital from February to December 1999. Age, sex, race, implantation or not of the intraocular lens (IOL, type of opacity of the posterior capsule, visual acuity with pre- and posttreatment correction (Avcc, complications found, behavior of the intraocular pressure (IOP, as well as the energy used to carry out such procedure, were analyzed. The Chi square contingency tables were used to this end. As a result of this research, it was found that the laser is highly effective for improving visual acuity in patients

Computational modeling of intraocular gas dynamics

International Nuclear Information System (INIS)

Noohi, P; Abdekhodaie, M J; Cheng, Y L

2015-01-01

The purpose of this study was to develop a computational model to simulate the dynamics of intraocular gas behavior in pneumatic retinopexy (PR) procedure. The presented model predicted intraocular gas volume at any time and determined the tolerance angle within which a patient can maneuver and still gas completely covers the tear(s). Computational fluid dynamics calculations were conducted to describe PR procedure. The geometrical model was constructed based on the rabbit and human eye dimensions. SF_6 in the form of pure and diluted with air was considered as the injected gas. The presented results indicated that the composition of the injected gas affected the gas absorption rate and gas volume. After injection of pure SF_6, the bubble expanded to 2.3 times of its initial volume during the first 23 h, but when diluted SF_6 was used, no significant expansion was observed. Also, head positioning for the treatment of retinal tear influenced the rate of gas absorption. Moreover, the determined tolerance angle depended on the bubble and tear size. More bubble expansion and smaller retinal tear caused greater tolerance angle. For example, after 23 h, for the tear size of 2 mm the tolerance angle of using pure SF_6 is 1.4 times more than that of using diluted SF_6 with 80% air. Composition of the injected gas and conditions of the tear in PR may dramatically affect the gas absorption rate and gas volume. Quantifying these effects helps to predict the tolerance angle and improve treatment efficiency. (paper)

Estudio biométrico ocular en una población adulta del estado de Sinaloa

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Juliana Marcela Morales Avalos

2016-01-01

Resultados: Se incluyeron 304 ojos con un rango de edad de 29-98 años con una media de 68 años. La distribución por género fue del 53.94% (164 ojos para el género femenino y del 46.05% (140 ojos para el género masculino. El 51.31% (156 ojos fueron derechos y el 48.68% (148 ojos fueron izquierdo. Los resultados de los valores biométricos fueron: profundidad de cámara anterior, rango 2.39-4.6 con promedio de 3.14 mm; espesor de cristalino, rango 2.49-5.42 con promedio de 3.65 mm; profundidad de cámara vítrea, rango de 13.69-19.59 con promedio de 16.28 mm; y la longitud anteroposterior con rango 20.18-27.3 con promedio de 23.09 mm; el promedio del poder dióptrico deseado para emetropía del lente intraocular es de 22.40 dioptrías.

Los dueños del dinero. Prestamistas abulenses a mediados del siglo XV = The Masters of Money. Money-Lenders in Mid-Fifteenth-Century Ávila

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Octavio Colombo

2016-06-01

Full Text Available El objetivo del presente trabajo es reconstruir el perfil socioeconómico de los prestamistas abulenses que aparecen en el libro del notario Gómez González entre los años 1448 a 1451. Allí consta la existencia de unas setecientas operaciones de préstamo, de las cuales más de la mitad tienen como acreedores a un pequeño número de sujetos. A su vez, los mismos aparecen involucrados en numerosas actividades económicas adicionales. Se realiza en primer lugar una presentación del conjunto de las deudas consignadas, su distribución temporal, sus montos y de las características globales de prestamistas y prestatarios. Luego, se analizan las actividades de los acreedores más prominentes, utilizando para ello documentación complementaria del concejo de Ávila. En base a ello, por último, se intenta una reconstrucción del perfil social de este segmento de la sociedad concejil bajomedieval. The objective of this paper is to reconstruct the socio-economic profile of money-lenders in Ávila which appear in the books of the public notary, Gómez González, between 1448 and 1451. From this source, it is possible to identify close to seven hundred credit records, of which more than half belong to a small group of lenders. Furthermore, these creditors also appear taking part in many additional economic activities. First, we present a comprehensive examination of these loans, their chronological distribution, the monetary quantities and the general features of the lenders and the borrowers. Secondly, we analyze the activities of the most prominent lenders using supplementary documents from Ávila. Finally and based on this collected data, we intend to reconstruct the social profile of this group within late-medieval urban society.

Raised intraocular pressure and recurrence of retinal detachment as complications of external retinal detachment surgery

International Nuclear Information System (INIS)

Jawwad, M.; Khan, B.; Shah, M.A.; Qayyum, I.; Aftab, M.; Qayyum, I.

2015-01-01

Patients with Rhegmatogenous retinal detachment may develop raised intraocular pressure and recurrence of retinal detachment when they undergo external retinal detachment surgery. The present study was conducted to determine the postoperative rise in intraocular pressure (IOP) and recurrence of retinal detachment. Methods: The present descriptive study was conducted at Eye department of Lady Reading Hospital, Peshawar on 25 patients of both genders from August 2012 to July 2014. Results: Of the 25 patients, 18 (72%) developed raised IOP in the immediate postoperative period; this figure decreased to 12 (48%) at one week. Following medical or surgical intervention in these 12 cases, there was only 1 (4%) case with mildly raised IOP at two weeks postoperative. Five (20%) cases developed recurrent retinal detachment which later resolved with treatment. There were no significant differences by age or gender. Conclusion: External Retinal Detachment Surgery raised intraocular pressure postoperatively and caused recurrence of retinal detachment. These complications were treated medically and surgically with resolution within two weeks. (author)

Optimizing outcomes with multifocal intraocular lenses

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Gitansha Shreyas Sachdev

2017-01-01

Full Text Available Modern day cataract surgery is evolving from a visual restorative to a refractive procedure. The advent of multifocal intraocular lenses (MFIOLs allows greater spectacle independence and increased quality of life postoperatively. Since the inception in 1980s, MFIOLs have undergone various technical advancements including trifocal and extended depth of vision implants more recently. A thorough preoperative workup including the patients' visual needs and inherent ocular anatomy allows us to achieve superior outcomes. This review offers a comprehensive overview of the various types of MFIOLs and principles of optimizing outcomes through a comprehensive preoperative screening and management of postoperative complications.

[Congenital lens subluxation: visual acuity outcomes and intraocular lens postoperative position].

Science.gov (United States)

Arraes, Caroline; Endriss, Daniela; Lobato, Francisco; Arraes, João; Ventura, Marcelo

2010-01-01

To evaluate the visual acuity outcomes and to investigate the intraocular lens (IOL) and endocapsular ring positions with ultrasound biomicroscopy in 17 eyes of 10 patients with congenital lens subluxation who underwent the same surgical technique, by the same surgeon. The study was performed in the ''Hospital de Olhos de Pernambuco'' and ''Fundação Altino Ventura''. The surgical technique consisted of phacoaspiration with implant of endocapsular ring and intraocular lens with one loop haptic amputated. The age varied from 7 to 22 years. Data on visual acuity (VA) before and after surgery, surgery follow-up period, and complications were analyzed. All patients underwent ultrasound biomicroscopy. The mean follow-up period was 2.8 years. There was a VA improvement in 17 (100%) eyes: in 12 eyes (70.6%) the visual acuity was better than 20/40; 4 (23.5%) ranged from 20/40 to 20/100, and 1 (5.9%) had visual acuity worse than 20/100, however better than the preoperative visual acuity. The posterior capsular opacification occurred in 10 eyes (58.9%). Ultrasound biomicroscopy showed that all IOL were partially decentralized, however without surpassing the pupil border limit. Endocapsular ring position was correct and there was a good capsular support in all cases. The evaluated surgical treatment provided good intraocular lens and endocapsular ring position, with VA improvement Thus, this technique is a viable, effective and safe option for the visual rehabilitation of patients with congenital lens subluxation.

Autorefraction versus subjective refraction in a radially asymmetric multifocal intraocular lens

NARCIS (Netherlands)

Linden, J.W.M. van der; Vrijman, V.; El-Saady, R.; Meulen, I.J. van der; Mourits, M.P.; Lapid-Gortzak, R.

2014-01-01

PURPOSE: To evaluate whether the automated refraction (AR) correlates with subjective manifest (MR) refraction in eyes implanted with radially asymmetric multifocal intraocular lens (IOLs). METHODS: This retrospective study evaluated 52 eyes (52 patients) implanted with a radially asymmetric

Impacto económico del turismo de crucero: caso República Dominicana

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José Alberto Acosta Guzmán

2017-01-01

Full Text Available Debido al rápido crecimiento de la actividad turística en el segmento del turismo de cruceros en el mundo actual, gobiernos y actores involucrados en esta clasificación especial del turismo, han observado la necesidad de conocer de forma más profunda la magnitud del impacto económico, que la industria del crucero produce en los diferentes destinos turísticos. Además, entender en particular, cómo los cruceristas gastan su dinero durante su estadía, es una información esencial para los diferentes actores involucrados en la gestión, crecimiento y desarrollo de esta actividad turística. La presente investigación tiene como propósito analizar el impacto económico del turismo de crucero en la República Dominicana. Cuando se habla de turismo de cruceros, no sólo se hace referencia a la embarcación y a los puertos-destino, sino a una compleja red en donde actúan múltiples factores que directa o indirectamente hacen de este producto turístico uno de los más importantes. Se considera la Encuesta de Gasto y Opinión a Pasajeros de Cruceros sobre el consumo que realizan los turistas de cruceros en su estadía en el país, tomando en cuenta los productos que adquieren como unidad económica de consumo, es decir, bienes y servicios inherentes al propio viaje como comidas, bebidas, entretenimientos, transporte local, tours, entre otros gastos, se excluye el alojamiento, así como las compras para fines comerciales.

Comparação de resposta da pressão intraocular frente a duas diferentes intensidades e volumes do treinamento resistido

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Marcelo Conte

2014-01-01

Full Text Available Objetivo: Verificar a influência de duas diferentes intensidades e volumes de treinamento resistido na pressão intraocular. Método: Dezenove boxeadores (13 homens e 6 mulheres; idade média de 22 ± 3 anos foram randomicamente submetidos a duas diferentes sessões de exercícios resistidos: resistência muscular com 3 séries de 15 repetições máximas e hipertrofia muscular com 4 séries de 8RM. A pressão intraocular foi obtida com Tonometro de Perkins antes, durante e após as sessões de exercício resistido. Os dados foram expressos em média e desvio padrão. Foi realizada análise de variância (ANOVA com medidas repetidas e pós teste de Tukey. Resultados: Foi observada redução da pressão intraocular durante as sessões de treinamento resistido. Contudo, a sessão de exercício para resistência muscular promoveu uma redução significativa da pressão intraocular comparada a de hipertrofia muscular. Ao final da sessão de resistência muscular a pressão intraocular retornou aos valores prévios ao exercício, por outro lado na sessão de hipertrofia muscular a pressão intraocular após o término dos exercícios apresentou-se acima dos valores iniciais. Conclusão: O treinamento resistido pode influenciar os valores da pressão intraocular, especificamente 3 séries de 15 repetições com 60% de 1RM promoveu respostas hipotensivas mais expressivas na pressão intraocular do que 3 séries de 8 repetições com 80% de 1RM. Esses achados podem contribuir para prescrição de exercício resistido para pessoas com fatores de risco para o glaucoma.

[Opacification of an intraocular lens: calcification of hydrophilic intraocular lenses after gas tamponade of the anterior chamber].

Science.gov (United States)

Schmidinger, G; Pemp, B; Werner, L

2013-11-01

A patient with endothelial dystrophy was treated with Descemet stripping automated endothelial keratoplasty (DSAEK) combined with cataract extraction and implantation of a hydrophilic intraocular lens (IOL, Lentis-L312, Oculentis) but visual acuity dropped from 0.15 logMAR to 0.52 logMAR 18 months later due to calcification of the IOL. With new methods of lamellar corneal transplantation being used more frequently the number of necessary anterior chamber tamponades with air/gas are increasing. In cataract cases in which a gas tamponade and transplantation might be necessary later on (cornea guttata), hydrophilic IOLs should be avoided.

Customer segmentation model based on value generation for marketing strategies formulation

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Alvaro Julio Cuadros

2014-01-01

Full Text Available Cuando se está decidiendo en qué segmento invertir o cómo distribuir el presupuesto de marketing, los Gerentes corren el riesgo de terminar tomando decisiones de manera general sin considerar el verdadero impacto que tiene cada cliente o segmento de clientes en las utilidades de la organización. En este artículo, se propone un modelo de segmentación de clientes que considera en primera instancia el cálculo de tres dimensiones: el valor de cliente en su ciclo de vida, el valor actual y la lealtad; para posteriormente construir los segmentos mediante mapas auto-organizados. La efectividad del modelo se probó en un Ingenio Azucarero donde se identificaron 9 segmentos de interés para la toma de decisiones de marketing.

Personalización de las constantes en las fórmulas de cálculo de la lente intraocular Personalization of constants in the intraocular lens calculation formulas

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Anneé Miranda Carracedo

2012-12-01

Full Text Available Objetivo: personalizar las constantes A, factor cirujano y profundidad de la cámara anterior para las fórmulas de cálculo de la lente intraocular en la cirugía de catarata en el Instituto Cubano de Oftalmología "Ramón Pando Ferrer" de mayo de 2007 a enero de 2011. Métodos: se realizó un estudio descriptivo retrospectivo donde se estudiaron las constantes A, factor cirujano y profundidad de la cámara anterior. También se evaluó la longitud axial preoperatoria por IOL Master, la mejor agudeza visual sin corrección, el componente esférico esperado, el componente esférico obtenido y los resultados refractivos. Resultados: las constantes optimizadas por interferometría de coherencia parcial son diferentes a las propuestas por los fabricantes de las lentes intraoculares. Estas constantes personalizadas para cada cirujano no mostraron diferencias significativas. Las constantes optimizadas según las longitudes axiales, tienen diferencias significativas en los 3 grupos de estudio. La diferencia entre la lente intraocular implantada y la propuesta con las nuevas constantes resultó menor de 1 D de error en 83,1 % de los pacientes. El 75,4 % quedó bien corregido en relación con la diferencia entre la refracción esperada y la obtenida. Conclusiones: las constantes optimizadas por interferometría de coherencia parcial resultan más elevadas que las propuestas por el fabricante. La optimización de estas en el cálculo de la lente permite, de acuerdo a las características individuales de cada ojo (longitud axial, usar la fórmula adecuada e incrementa la predictibilidad de los resultados refractivos posoperatorios.Objective: to personalize the A, surgeon factor and anterior chamber depth constants for intraocular lens calculation formulas in the cataract surgery at the “Ramón Pando Ferrer” Cuban Ophthalmological Institute from May 2007 to January 2011. Method: a retrospective and descriptive study was made to study the A constant

Teste de esforço: alterações do segmento ST restritas à fase de recuperação

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Oliveira Fº J. A.

1999-01-01

Full Text Available OBJETIVO: Determinar a incidência de doença coronária aterosclerótica (DCA e/ou isquemia miocárdica em pacientes (pt com alterações do segmento ST restritas à fase de recuperação (ASTRR do teste ergométrico. CASUÍSTICA E MÉTODO: Estudo retrospectivo em 19 pacientes não consecutivos com ASTRR, através da cinecoronariografia e/ou cintigrafia de esforço planar. Amostra de 18 homens, uma mulher, com idade de 58 ± 9 anos, 18 sintomáticos. RESULTADOS: ASTRR correspondem a segmentos ST infra-desnivelados de 1 a 4 mm da linha de base, com inversão da onda T durante a recuperação precoce (2pt, tardia (14 pt. Foi documentada DCA em 14 pt (nove submetidos à cirurgia de revascularização; miocardiopatia hipertensiva com coronárias normais em 3 pt e prolapso de válvula mitral em 1 pt. Em 13 casos a cinecoronariografia e/ou cintilografia de esforço foram realizados dentro de seis meses do Teste Ergométrico, sendo a presença de DCA e ou isquemia miocárdica detectadas em 8 pt. Em 3 pt, testes ergométricos sucessivos mostraram ASTRR reprodutíveis em dois casos. CONCLUSÃO: Os autores relatam a elevada prevalência de DCA e ou hipoperfusão transitória na cintigrafia de esforço em homens sintomáticos de meia idade com ASTRR no teste de esforço.

El sistema mexicano del club de clientes como alternativa de desarrollo para distribuidores independientes de suplementos nutricionales en Panamá 2004-2005.

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Graciela López Méndez

2016-02-01

Full Text Available En este trabajo se demuestra, mediante un trabajo experimental participativo, que el sistema mexicano del club de clientes (smcc es una alternativa de desarrollo para los distribuidores independientes de suplementos nutricionales bajo el sistema multinivel en otras regiones. El objetivo se cumple al constatar que los distribuidores en Panamá que aceptaron participar en el plan piloto de adopción del smcc pudieron al final del periodo de experimentación aumentar sus ventas directas, así como su ingreso por concepto de regalías. El smcc se desarrolló en México para ampliar el mercado hacia segmentos de poder adquisitivo limitado mediante la venta de porciones diarias a precios accesibles, en vez de comercializar sólo paquetes de productos que significan un desembolso alto en una sola exhibición. Esta modalidad, además de aumentar la venta directa facilita el reclutamiento de nuevos distribuidores, por lo que también mejoran los ingresos por las ventas de los distribuidores de su red.

Epiderme dos segmentos foliares de Mauritia flexuosa L. f. (Arecaceae em três fases de desenvolvimento Epidermis of leaf segments from Mauritia flexuosaL. f. (Arecaceae on three phases of development

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Mahedy Araújo Bastos Passos

2006-12-01

Full Text Available São apresentados os dados anatômicos da epiderme dos segmentos foliares de Mauritia flexuosa L. f. (Arecaceae em três fases do desenvolvimento. Os segmentos foliares foram analisados em toda a extensão do limbo. As células intercostais da epiderme das faces adaxial e abaxial evidenciam-se com paredes sinuosas, retangulares e orientadas longitudinalmente em relação ao eixo do segmento foliar com acentuada presença de corpos de sílica esférico-espinulosos. As células epidérmicas da região costal de ambas as faces apresentam paredes retas e variam entre curtas, longas e arredondadas. Os tricomas são simples, unicelulares, longos, com base mais alargada. Os segmentos foliares de M. flexuosa são anfiestomáticos com estômatos tetracíticos. Em secção transversal a epiderme foliar é uniestratificada com câmara subestomática ampla. Os resultados obtidos não demonstraram variações expressivas entre as três fases de desenvolvimento e os caracteres encontrados parecem ser comuns a outras palmeiras.Anatomic data on the epidermis leaf segments from Mauritia flexuosa L. f. (Arecaceae are presented on three phases of development. Leaf segments were analyzed on the all extension of leaf. Both adaxial and abaxial epidermal cells stand out with sinuous walls, rectangular and longitudinally oriented to the foliar axis with the marked presence of spherical- spiny silica bodies. The back epidermal cells of both surfaces present straight walls and vary among short, long and round. Trichomes are unicellular, simple, long, with a wider base. Leaf segments from M. flexuosa are anphistomatic with tetracitic type stomats. In a cross-section the leaf skin is unistratified with a broad substimatic chamber. The findings obtained showed no significant variations among the three phases of development and the characters that were found appear to be common on other palm trees.

Autorefraction versus subjective refraction in a radially asymmetric multifocal intraocular lens

NARCIS (Netherlands)

van der Linden, Jan Willem; Vrijman, Violette; Al-Saady, Rana; El-Saady, Rana; van der Meulen, Ivanka J.; Mourits, Maarten P.; Lapid-Gortzak, Ruth

2014-01-01

To evaluate whether the automated refraction (AR) correlates with subjective manifest (MR) refraction in eyes implanted with radially asymmetric multifocal intraocular lens (IOLs). This retrospective study evaluated 52 eyes (52 patients) implanted with a radially asymmetric multifocal IOL (LS-312

Toric Intraocular Lenses in the Correction of Astigmatism During Cataract Surgery

DEFF Research Database (Denmark)

Kessel, Line; Andresen, Jens; Tendal, Britta

2016-01-01

TOPIC: We performed a systematic review and meta-analysis to evaluate the benefit and harms associated with implantation of toric intraocular lenses (IOLs) during cataract surgery. Outcomes were postoperative uncorrected distance visual acuity (UCDVA) and distance spectacle independence. Harms were...

Clinical observation of four-fixable intraocular lens suspensory

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Yu-Ming Teng

2015-06-01

Full Text Available AIM: To discuss the four-fixable intraocular lens(IOLsuspensory in the absence of capsular intraocular lens implantation, suspensory ligament rupture caused by congenital dislocation of the lens, traumatic cataract and posterior capsular rupture without capsular support, which need to line hanging IOL for intraoperative clinical observation.METHODS: The 31 cases(32 eyeswho were accepted the four-fixable IOL suspensory from May 2012 to May 2014 in our hospital were retrospectively analyzed. The postoperative visual acuity, corneal astigmatism, intraoperative and postoperative complications were comprehensively analyzed.RESULTS: Patients were followed up 6mo～1a, corrected visual acuity >0.5(12 eyes, 38%, 0.1～0.5(18 eyes, 56%, and CONCLUSION: It is designed to support non-capsular IOL implantation and design, and the concept of changing the past presence of suspended dislocated IOL implantation surgery, positional deviation and, sutures and other complications split the incidence is greatly reduced. It is consistent with the physiological characteristics of the human eye, and it is the IOL surgical sling best stability, intraoperative and postoperative complications, the best visual acuity and corneal astigmatism minimal surgical approachat least, and the four-point suspension suture fixation of IOL is designed to obtain a practical transformation of Chinese patent.

Intraocular lenses and clinical treatment in paediatric cataract

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Camila Ribeiro Koch Pena

2015-06-01

Full Text Available Pediatric cataract is the most common treatable cause of blindness in children. Prevalence, etiology and morphology vary with the socioeconomic development. The treatment goal is to reduce amblyopia, being difficult management especially in unilateral cases. The decision on aphakia or primary intraocular lens should be individualized as well as correction with contact lens or spectacles. The intraocular lens single-piece hydrophobic acrylic are the most implanted in children and the preferably is in the capsular bag. The Sanders-Retzlaff-Kraff theoretic (SRK/T stressing that is described as more predictable, following Holladay I and SRK II and the recommendation is to under correction +6.0 or +8.0 dioptrias expecting the growth of the eye. The posterior capsule opacity is the most frequent complication and varies with the material choice of the lens. Glaucoma is the most serious postoperative complication and depends on the timing of the surgery, primary lens implantation and time of post surgical follow-up. The adherence to occlusion therapy with patching is critical to the visual prognosis and is determined by the child’s age and laterality of the cataract. There was significant improvement in the surgery and in IOLs, however the final visual prognosis is still not desirable.

Análisis y diseño de un datamart para la unidad de negocios de cobranzas de una entidad financiera

OpenAIRE

Gomero Paredes, José Luis; Gomero Paredes, José Luis; Gomero Paredes, José Luis

2013-01-01

El área de Cobranzas Banca Minorista es una unidad estratégica del banco de crédito BCP. Y tiene misión principal la gestión de cobranzas de las cuentas que se encuentran en situación morosidad; es decir, desde que cumplen el primer día de morosos hasta que salen de esta situación. Le gestión de cobranzas básicamente se realiza a través de canales de gestión, los cuales se utilizan dependiendo del segmento de morosidad al cual pertenece el cliente. Un segmento de morosidad se determina med...

Bilateral implantation of +2.5 D multifocal intraocular lens and contralateral implantation of +2.5 D and +3.0 D multifocal intraocular lenses: Clinical outcomes

NARCIS (Netherlands)

Nuijts, Rudy M. M. A.; Jonker, Soraya M. R.; Kaufer, Robert A.; Lapid-Gortzak, Ruth; Mendicute, Javier; Martinez, Cristina Peris; Schmickler, Stefanie; Kohnen, Thomas

2016-01-01

To assess the clinical visual outcomes of bilateral implantation of Restor +2.5 diopter (D) multifocal intraocular lenses (IOLs) and contralateral implantation of a Restor +2.5 D multifocal IOL in the dominant eye and Restor +3.0 D multifocal IOL in the fellow eye. Multicenter study at 8

Las élites coloniales y la politicidad del sexo (Cuenca, segunda mitad del siglo XVIII

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Natalia Catalina León Galarza

2001-01-01

Full Text Available En el año de 1767, Manuel Rodrígues, blanco, pobre, se vio envuelto en una demanda de separación perpetua interpuesta por su mujer Rosa de Castro. Años atrás, según el argumento de la demandante, él habría entablado relaciones carnales con su cuñada menor Josefa de Castro, quien con la pareja; del adulterio incestuoso nació un hijo. En otro segmento social y durante la misma época, María Quesada, mestiza, fue acusada de atentar contra la vida de su marido, el indio Tomás de San Martín; ella se habría confabulado con su cuñado Silvestre de San Martín, con quien mantenía relaciones ilícitas y pretendía huir después de consumar el asesinato. A la sazón, María tenía a su haber un amancebamiento con otro miembro de su familia política: un tío carnal de su marido; el hecho fue narrado ante las autoridades con sorprendente franqueza y sin rastro de arrepentimiento (León 1997.

Los desafíos contemporáneos del imperio estatal ante las organizaciones internacionales: violación de la soberanía frente a la legitimidad de protección a lo derecho de paz

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Luiz Fernando Vescovi

2017-04-01

Full Text Available Este ensayo académico tiene como objetivo exponer las barreras existentes actualmente entre el dominio clásico del poder del Estado y las actividades de las organizaciones internacionales sobre la dicotomía entre el intento, por parte de los Estados-nación, de proteger el sentido tradicional del instituto de la soberanía y la moderna actividad realizada por las organizaciones de carácter internacional que tienen como objetivo, por tanto, la máxima protección del derecho a la paz, lo que demuestra la dificultad de encontrar un umbral común para lograr la satisfacción de ambos los segmentos ideológicos, exponiéndose, a la luz de principios básicos de los derechos humanos y el derecho humanitario, las principales consecuencias (políticas y económicas que surgen de esta oposición.

Retropupillary iris-claw intraocular lens in ectopia lentis in Marfan syndrome

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Faria MY

2016-06-01

Full Text Available Mun Yueh Faria,1 Nuno Ferreira,2 Eliana Neto,1 1Vitreo Retinal Department, 2Ophthalmology Department, Santa Maria Hospital, Lisbon, Portugal Objective: To report visual outcomes, complication rate, and safety of retropupillary iris-claw intraocular lens (ICIOL in ectopia lentis in Marfan syndrome (MFS. Design: Retrospective study. Methods: Six eyes of three MFS patients with ectopia lentis underwent surgery for subluxation lens and retropupillary ICIOL implantation from October 2014 to October 2015 at the Department of Ophthalmology, Santa Maria Hospital in Lisbon, Portugal. Demographics, preoperative and postoperative best-corrected visual acuity (BCVA, and intraocular pressure were evaluated. Endothelium cell count was assessed using specular microscopy; anterior chamber depth was measured using Pentacam postoperatively; and intraocular lens position was viewed by ultrasound biomicroscopy. All patients were female; mean age was 20±14.264 years (range: 7–38 years. Results: The average follow-up period was 6.66 months (range: 4–16 months. Preoperative BCVA was 0.568±0.149 logMAR units, and postoperative BCVA was 0.066±0.121 logMAR units. The mean BCVA gain was –0.502±0.221 on the logMAR scale. Postoperative average astigmatism and intraocular pressure were 1.292±0.697 mmHg (range: 0.5–2.25 mmHg and 16 mmHg (range: 12–18 mmHg, respectively. The average endothelial cell density decreased from 3,121±178 cells/mm2 before surgery to 2,835±533 cells/mm2 after surgery (measured at last follow-up visit and in the last follow-up, representing an average endothelial cell loss of 9.16%. Mean anterior chamber depth was 4.01 mm (±0.77 mm, as measured by Pentacam. No complications were found intra- or postoperatively in any of the six studied eyes. Conclusion: Retropupillary ICIOL implantation is a safe and effective procedure in the treatment of aphakia in MFS eyes, without capsular support after surgery for ectopia lens. The six eyes that

The Effect of Altitude on Intraocular Pressure in Vitrectomized Eyes with Sulfur Hexafluoride Tamponade by the Friedenwald Method: Rabbit Animal Model

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Jans Fromow-Guerra

2016-01-01

Full Text Available The aim of this study is to assess the change in intraocular pressure after a road trip, in eyes with different levels of filling with gas tamponade. Five rabbit eyes were subject to pars plana vitrectomy and gas tamponade (filling percentage: 25%, 50%, and 100% of nonexpansile SF6, 100% saline solution, and 100% room air. A sixth eye was injected with 0.35 cc of undiluted SF6 without vitrectomy. Guided by global positioning system, they were driven to the highest point of the highway connecting Mexico City with Puebla city and back, stopping every 300 m to assess intraocular pressure. The rabbit’s scleral rigidity and estimation for human eyes were done by using the Friedenwald nomogram. Maximum altitude was 3209 m (Δ949 m. There were significant differences in intraocular pressure on the rabbit eyes filled with SF6 at 100%, 50%, 25%, and 100% room air. Per every 100 m of altitude rise, the intraocular pressure increased by 1.53, 1.0046, 0.971, and 0.97 mmHg, respectively. Using the human Friedenwald rigidity coefficient, the human eye estimate for intraocular pressure change was 2.1, 1.8, 1.4, and 1.1 mmHg per every 100 m of attitude rise. Altitude changes have a significant impact on intraocular pressure. The final effect depends on the percentage of vitreous cavity fill and scleral rigidity.

Pharmacokinetics and efficacy of intraocular flurbiprofen.

Science.gov (United States)

Blazaki, S; Tsika, C; Tzatzarakis, M; Naoumidi, E; Tsatsakis, A; Tsatsanis, C; Tsilimbaris, Miltiadis K

2017-12-01

Intravitreal delivery of non-steroidal anti-inflammatory drugs could be an effective way to treat macular edema caused by posterior segment inflammation. In this study, we evaluated the intravitreal bioavailability and anti-inflammatory efficacy of flurbiprofen in rabbit eyes. For pharmacokinetics, 0.1 ml of 7.66 mg/ml flurbiprofen solution was injected intravitreally and vitreous drug levels were analyzed at specific time points using LC-MS technique. For efficacy, 100 ng lipopolysaccharide of E.coli was injected intravitreally in rabbits to induce inflammation. The animals were separated in three groups and received intraocular flurbiprofen, dexamethasone and PBS to serve as control. Complete ocular examination and total cell count in aqueous fluid were determined to evaluate the extent of inflammation. Eyes were then enucleated for histopathology analysis. The efficacy in the uveitis model was determined by clinical signs of inflammation, total leukocyte count and histology findings. No adverse events were observed during pharmacokinetic assessment. No signs of inflammation, hemorrhage or retina detachment were detected. The recovery of flurbiprofen from vitreous samples was 92.6%. The half-life of flurbiprofen was estimated to be 1.92 h with an elimination constant rate (K) of 0.36. Treatment with intraocular injections of flurbiprofen and dexamethasone significantly reduced total leukocyte count in a manner comparable to dexamethasone [reduction of 96.84% (p flurbiprofen injection compared to control eyes. Flurbiprofen is effective in suppressing inflammation in this experimental uveitis model. In our experimental setting, intravitreal flurbiprofen seem to have a therapeutic result comparable to dexamethasone. However, the half-life of the drug remains short, necessitating further research to prolong its presence in the vitreous cavity.

Intraocular Lens Calcification; a Clinicopathologic Report

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Mozhgan Rezaei-Kanavi

2009-04-01

Full Text Available

PURPOSE: To describe the clinical and pathological features of a case of hydrogel intraocular lens (IOL calcification. CASE REPORT: A 48-year-old man underwent explantation of a single-piece hydrophilic acrylic intraocular lens in his left eye because of decreased visual acuity and milky white opalescence of the IOL. The opacified lens was exchanged uneventfully with a hydrophobic acrylic IOL. Gross examination of the explanted IOL disclosed opacification of the optic and haptics. Full-thickness sections of the lens optic were stained with hematoxylin and eosin (H&E, von Kossa and Gram Tworts'. Microscopic examination of the sections revealed fine and diffuse basophilic granular deposits of variable size within the lens optic parallel to the lens curvature but separated from the surface by a moderately clear zone. The deposits were of high calcium content as evident by dark brown staining with von Kossa. Gram Tworts' staining disclosed no microorganisms. CONCLUSION: This report further contributes to the existing literature on hydrogel IOL calcification.

ANÁLISE DO DESEMPENHO DE EMPRESAS DO SEGMENTO DE CARNES E DERIVADOS LISTADAS NA BM&FBOVESPA

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Simone Sehnem

2012-10-01

Full Text Available O objetivo do trabalho consiste em analisar o desempenho econômico e financeiro das empresas frigoríficas que negociam ações na BM&FBOVESPA em uma série histórica que compreende um período de 5 anos. A fundamentação teórica resgata aspectos relacionados a internacionalização de empresas e estudos que relacionam internacionalização e desempenho. O trabalho foi desenvolvido por meio da utilização de dados das empresas do segmento de carnes e derivados, isto é, frigoríficos, disponibilizados no economática e que negociam ações na BM&FBOVESPA. No que diz respeito à forma de abordagem do problema, a presente pesquisa trabalha sob o enfoque quantitativo e classifica-se em uma pesquisa de cunho descritivo. Com relação aos procedimentos, classifica-se em uma análise de uma série histórica do desempenho econômico e financeiro das organizações de capital aberto pertencentes ao segmento de frigoríficos, o que permite fazer um diagnóstico dessas empresas. As contribuições desta pesquisa consistem em elucidar que ficou perceptível que as empresas lideres do setor, quais sejam JBS Friboi, BR Foods e Marfrig, em sua maioria ocupam a liderança nos indicadores de desempenho econômico analisados. São empresas que cresceram e se internacionalizaram nos últimos anos, aumentando o patrimônio, a estrutura produtiva e os rendimentos. Possuem maior capacidade de competir, por terem estruturas de escala e unidades industriais distribuídas nos diferentes continentes, o que lhes aufere ganhos em detrimento das empresas de porte menor. Conclui-se que a internacionalização impacta de maneira forte no desempenho das organizações analisadas no presente estudo

Reacciones del consumidor mexiquense hacia las faltantes en anaquel. ¿Qué factores intensifican las reacciones negativas hacia el detallista?

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Victoria Eugenia Erosa Martín

2011-01-01

Full Text Available Este estudio analiza las reacciones de los consumidores ante faltantes de anaquel en una empresa local del sector del comercio al menudeo con el propósito de apoyar en el diseño de estrategias para incrementar la satisfacción y retención de su clientela. Se tomaron como referencias teóricas la satisfacción y el comportamiento del consumidor; para ello, se realizó una encuesta en tiendas detallistas con distintos perfiles donde se recopilaron datos sobre el perfil demográfico y de compra de los consumidores, así como sus reacciones ante faltantes en la tienda. Cabe aclarar que los datos se analizaron a través de varias técnicas estadísticas. Se concluye que el género, lugar de residencia del cliente, valor de la compra y su lealtad a la tienda afectan significativamente su intención de cambiarla cuando ésta registra faltantes de los productos de su lista de compra. Los resultados obtenidos identifican no sólo segmentos de consumidores, sino también tipos de tiendas más sensibles a sufrir un deterioro en su base de clientes ante la ocurrencia de faltantes.

Evaluación de la Efectividad del Restaurante-Bar El Molino en el Campo de Percepción de Marca Usando un Sistema de Simulación Basado en Agentes

OpenAIRE

Arteaga Castro, Libardo; Múnera Álvarez, Esteban

2014-01-01

El siguiente trabajo, a partir de la identificación de los diferentes sujetos que participan en el medio ambiente donde se desenvuelve el restaurante El Molino, busca determinar cuáles podrían ser las estrategias de mercadeo más efectivas para que la imagen, concepto y servicio del restaurante, la marca en general, resulte lo más atractivas posibles para los segmentos objetivo de la empresa. Dadas las circunstancias de que es un negocio reciente, no existen datos históricos de la imagen que p...

Review and update of intraocular therapy in noninfectious uveitis.

Science.gov (United States)

Sallam, Ahmed; Taylor, Simon R J; Lightman, Sue

2011-11-01

To review new clinically relevant data regarding the intraocular treatment of noninfectious uveitis. Triamcinolone acetonide, the most commonly used intravitreal corticosteroid for treatment of uveitis and uveitic macular oedema has a limited duration of action and is associated with a high risk of corticosteroid-induced intraocular pressure (IOP) rise and cataract. Recent advances have led to the development of sustained-release corticosteroid devices using different corticosteroids such as dexamethasone and fluocinolone acetonide. Treatment options for patients who have previously exhibited corticosteroid hypertensive response have also expanded through the use of new noncorticosteroid intravitreal therapeutics such as methotrexate and antivascular endothelial growth factor (anti-VEGF) agents. Ozurdex dexamethasone implant appears to have a better safety profile, and a slightly long-lasting effect than triamcinolone acetonide. The Retisert implant allows the release of corticosteroids at a constant rate for 2.5 years, but it requires surgical placement and its use is associated with a very high risk of cataract and requirement for IOP-lowering surgery. For patients who are steroid responders, methotrexate may offer a better alternative to corticosteroid treatment than anti-VEGF agents, but controlled trials are required to confirm this.

Implantable intraocular pressure monitoring systems: Design considerations

KAUST Repository

Arsalan, Muhammad

2013-12-01

Design considerations and limitations of implantable Intraocular Pressure Monitoring (IOPM) systems are presented in this paper. Detailed comparison with the state of the art is performed to highlight the benefits and challenges of the proposed design. The system-on-chip, presented here, is battery free and harvests energy from incoming RF signals. This low-cost design, in standard CMOS process, does not require any external components or bond wires to function. This paper provides useful insights to the designers of implantable wireless sensors in terms of design choices and associated tradeoffs. © 2013 IEEE.

Implantable intraocular pressure monitoring systems: Design considerations

KAUST Repository

Arsalan, Muhammad; Ouda, Mahmoud H.; Marnat, Loic; Shamim, Atif; Salama, Khaled N.

2013-01-01

Design considerations and limitations of implantable Intraocular Pressure Monitoring (IOPM) systems are presented in this paper. Detailed comparison with the state of the art is performed to highlight the benefits and challenges of the proposed design. The system-on-chip, presented here, is battery free and harvests energy from incoming RF signals. This low-cost design, in standard CMOS process, does not require any external components or bond wires to function. This paper provides useful insights to the designers of implantable wireless sensors in terms of design choices and associated tradeoffs. © 2013 IEEE.

Prevención del SIDA y relación entre géneros: Poder y cambio

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Mariela Carmona Sepúlveda

2013-07-01

Full Text Available Este documento pretende ser una reflexión sobre la adopción (o más bien sobre la no adopción de prácticas o conductas preventivas en parejas estables chilenas frente a la epidemia del SIDA. Dichas prácticas implican necesariamente un proceso de negociación de pareja en todo lo referente a la sexualidad y al uso del preservativo masculino como principal método de prevención. La construcción de una reflexión de este tipo implica necesariamente el abordar la relación hombre-mujer considerando la diferencia de géneros como una construcción social, pero también como una relación de poder, plasmada en las representaciones o significaciones sociales en torno a la sexualidad y a la enfermedad. O en términos de Castoriadis, es necesario tratar de entender el imaginario social de hombres y mujeres de un segmento particular de la sociedad chilena. Para esta reflexión, tomaremos prestados algunos conceptos mencionados por Norma Takeuti con ocasión de su intervención en el curso «Teorías del Poder», especialmente a partir de los trabajos de Castoriadis, Foucault y Bourdieu.

Bilateral spontaneous subluxation of scleral-fixated intraocular lenses.

Science.gov (United States)

Assia, Ehud I; Nemet, Arie; Sachs, Dani

2002-12-01

Two young men with primary ectopic lenses had intracapsular cataract extraction and scleral fixation of posterior chamber intraocular lenses (PC IOLs) using 10-0 polypropylene sutures tied to the IOL eyelets. Three to 9 years after implantation, spontaneous IOL vertical subluxation occurred in all 4 eyes (5 IOL loops), probably because of suture breakage. Late subluxation of a sutured IOL may occur several years after implantation. Double fixation and thicker sutures should be considered, especially in young patients.

Refractive lens exchange with a multifocal diffractive aspheric intraocular lens

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Teresa Ferrer-Blasco

2012-06-01

Full Text Available PURPOSE: To evaluate the safety, efficacy and predictability after refractive lens exchange with multifocal diffractive aspheric intraocular lens implantation. METHODS: Sixty eyes of 30 patients underwent bilateral implantation with AcrySof® ReSTOR® SN6AD3 intraocular lens with +4.00 D near addition. Patients were divided into myopic and hyperopic groups. Monocular best corrected visual acuity at distance and near and monocular uncorrected visual acuity at distance and near were measured before and 6 months postoperatively. RESULTS: After surgery, uncorrected visual acuity was 0.08 ± 0.15 and 0.11 ± 0.14 logMAR for the myopic and hyperopic groups, respectively (50% and 46.67% of patients had an uncorrected visual acuity of 20/20 or better in the myopic and hyperopic groups, respectively. The safety and efficacy indexes were 1.05 and 0.88 for the myopic and 1.01 and 0.86 for the hyperopic groups at distance vision. Within the myopic group, 20 eyes remained unchanged after the surgery, and 3 gained >2 lines of best corrected visual acuity. For the hyperopic group, 2 eyes lost 2 lines of best corrected visual acuity, 21 did not change, and 3 eyes gained 2 lines. At near vision, the safety and efficacy indexes were 1.23 and 1.17 for the myopic and 1.16 and 1.13 for the hyperopic groups. Best corrected near visual acuity improved after surgery in both groups (from 0.10 logMAR to 0.01 logMAR in the myopic group, and from 0.10 logMAR to 0.04 logMAR in the hyperopic group. CONCLUSIONS: The ReSTOR® SN6AD3 intraocular lens in refractive lens exchange demonstrated good safety, efficacy, and predictability in correcting high ametropia and presbyopia.

Intraocular Lens Use in an Astronaut During Long Duration Spaceflight.

Science.gov (United States)

Mader, Thomas H; Gibson, C Robert; Schmid, Josef F; Lipsky, William; Sargsyan, Ashot E; Garcia, Kathleen; Williams, Jeffrey N

2018-01-01

The purpose of this paper is to report the first use of an intraocular lens (IOL) in an astronaut during long duration spaceflight (LDSF). An astronaut developed a unilateral cataract and underwent phacoemulsification with insertion of an acrylic IOL. Approximately 15 mo later he flew on a Soyuz spacecraft to the International Space Station (ISS), where he successfully completed a 6-mo mission. Ocular examination, including ultrasound (US), was performed before, during, and after his mission and he was questioned regarding visual changes during each portion of his flight. We documented no change in IOL position during his space mission. This astronaut reported excellent and stable vision during liftoff, entry into microgravity (MG), 6 mo on the ISS, descent, and landing. Our results suggest that modern IOLs are stable, effective, and well tolerated during LDSF.Mader TH, Gibson CR, Schmid JF, Lipsky W, Sargsyan AE, Garcia K, Williams JN. Intraocular lens use in an astronaut during long duration spaceflight. Aerosp Med Hum Perform. 2018; 89(1):63-65.

Common Genetic Determinants of Intraocular Pressure and Primary Open-Angle Glaucoma

NARCIS (Netherlands)

van Koolwijk, Leonieke M. E.; Ramdas, Wishal D.; Ikram, M. Kamran; Jansonius, Nomdo M.; Pasutto, Francesca; Hysi, Pirro G.; Macgregor, Stuart; Janssen, Sarah F.; Hewitt, Alex W.; Viswanathan, Ananth C.; ten Brink, Jacoline B.; Hosseini, S. Mohsen; Amin, Najaf; Despriet, Dominiek D. G.; Willemse-Assink, Jacqueline J. M.; Kramer, Rogier; Rivadeneira, Fernando; Struchalin, Maksim; Aulchenko, Yurii S.; Weisschuh, Nicole; Zenkel, Matthias; Mardin, Christian Y.; Gramer, Eugen; Welge-Luessen, Ulrich; Montgomery, Grant W.; Carbonaro, Francis; Young, Terri L.; Bellenguez, Celine; McGuffin, Peter; Foster, Paul J.; Topouzis, Fotis; Mitchell, Paul; Wang, Jie Jin; Wong, Tien Y.; Czudowska, Monika A.; Hofman, Albert; Uitterlinden, Andre G.; Wolfs, Roger C. W.; de Jong, Paulus T. V. M.; Oostra, Ben A.; Paterson, Andrew D.; Mackey, David A.; Bergen, Arthur A. B.; Reis, Andre; Hammond, Christopher J.; Vingerling, Johannes R.; Lemij, Hans G.; Klaver, Caroline C. W.; van Duijn, Cornelia M.

2012-01-01

Intraocular pressure (IOP) is a highly heritable risk factor for primary open-angle glaucoma and is the only target for current glaucoma therapy. The genetic factors which determine IOP are largely unknown. We performed a genome-wide association study for IOP in 11,972 participants from 4

Tinting of intraocular lens implants

International Nuclear Information System (INIS)

Zigman, S.

1982-01-01

Intraocular lens (IOL) implants of polymethyl methacrylate (PMMA) lack an important yellow pigment useful as a filter in the visual process and in the protection of the retina from short-wavelength radiant energy. The ability to produce a yellow pigment in the PMMA used in IOL implants by exposure to near-ultraviolet (UV) light was tested. It was found that the highly cross-linked material in Copeland lens blanks was tinted slightly because of this exposure. The absorptive properties of lens blanks treated with near-UV light in this way approached that of the absorptive properties of human lenses. This finding shows that it is possible to alter IOL implants simply so as to induce a pale-yellow pigment in them to improve the visual process and to protect the retinas of IOL users

Tinting of intraocular lens implants

Energy Technology Data Exchange (ETDEWEB)

Zigman, S.

1982-06-01

Intraocular lens (IOL) implants of polymethyl methacrylate (PMMA) lack an important yellow pigment useful as a filter in the visual process and in the protection of the retina from short-wavelength radiant energy. The ability to produce a yellow pigment in the PMMA used in IOL implants by exposure to near-ultraviolet (UV) light was tested. It was found that the highly cross-linked material in Copeland lens blanks was tinted slightly because of this exposure. The absorptive properties of lens blanks treated with near-UV light in this way approached that of the absorptive properties of human lenses. This finding shows that it is possible to alter IOL implants simply so as to induce a pale-yellow pigment in them to improve the visual process and to protect the retinas of IOL users.

MICROANATOMÍA QUIRÚRGICA DEL SENO CAVERNOSO: SEGUNDA PARTE - UN NUEVO REPARO PARA ACCEDER AL CONTENIDO DEL SENO

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Juan Armando Mejía C.

2010-06-01

Full Text Available

Resumen

Objetivo: Hallar reparos anatómicos que permitan el abordaje seguro al seno cavernoso, utilizando medidas cronométricas para la conservación de estructuras vasculonerviosas.

Métodos: Se disecaron 25 especímenes frescos obtenidos del Instituto de Medicina Legal y ciencias forenses a través de un abordaje extradural y la medición con microcalibrador L& W tools desde la apófisis clinoide anterior y posterior hasta las estructuras neurovasculares de importancia. Se presentan los resultados de las mediciones y se hace un análisis de sus resultados donde se especifica la longitud de cada una de las aristas de los triángulos de dicha región.

Resultados: Se encuentra que a 5 milímetros de la punta del apófisis clinoide anterior medidos hacia abajo en una línea imaginaria perpendicular al piso de la fosa media en 21 especímenes se accedió al área del triangulo de Parkinson es decir entre el IV par y el oftálmico de Willis, pudiendo fácilmente encontrar el tronco meningohipofisiario, la porción transversa de la carótida interna intracavernosa y el segmento cavernoso del motor ocular externo; solo en cuatro piezas se llego al triangulo superior (cuya área es menor que la del triangulo de Parkinson y a través de este no fue fácil evidenciar ni el tronco meningohipofisiario ni el sexto par.

Conclusiones: Debido al mayor área del triángulo de Parkinson (dada por su arista posterior más larga el abordaje a dicho triángulo podría ser una vía útil para la búsqueda de patologías asociadas con las estructuras neurovasculares que a través de dicho triangulo se pueden visualizar (aneurismas del tronco meningohipofisiario, aneurismas saculares del segmento transverso de la carótida interna intracavernosa y/o neurinomas del VI par intracavernoso; y se en cuentra a 5 milímetros desde la punta de la apófisis clinoide anterior medidos hacia abajo en una línea imaginaria

Role of cataract surgery in lowering intraocular pressure

International Nuclear Information System (INIS)

Ahmad, S.; Sabih, A.

2015-01-01

To study the effects of cataract surgery in lowering of intraocular pressure (IOP). Study Design: Retrospective study. Place and Duration of Study: The Department of Ophthalmology, Combined Military Hospital, Rawalpindi from January 2011 to December 2013. Patients and Methods: The study included a total of 250 patients; of which 100 cases had simple cataract with no coexisting disease, 100 cases had cataract with primary open angle glaucoma and 50 cases of cataract had accompanying pseudoexfoliation glaucoma. All patients were assessed and recorded preoperatively for their IOP, vision, depth of anterior chamber (ACD), angle of anterior chamber by gonioscopy and glaucoma medications being used. Cataract surgery was performed by phacoemulsification and IOL implantations in all cases. These patients were followed up for a period of six months. Results: The intraocular ressure of all these patients was recorded at monthly interval for six months. The IOP showed a significant decrease in all cases and remained constant till the end of the study. A marked improvement of vision was noted in all cases. The depth of the anterior chamber increased and the angle also widened in all cases. Discussion: Cataract surgery has been found to reduce IOP along with improvement in vision. Patients with glaucoma have a dual benefit of reduced IOP and visual improvement after cataract surgery. (author)

TRATAMIENTO QUIRÚRGICO DEL CANCER GÁSTRICO: UNA VISIÓN ACTUALIZADA

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José Felix Patiño Restrepo

1984-09-01

Full Text Available

La conducta adoptada en el Hospital de La Samaritana coincide con algunos preceptos actualmente preconizados por la Clínica Lahey (54, uno de los centros que en una época promulgaron la extirpación radical y que mayor influencia produjeron en muchos países del mundo, así como con los preconizados por la Clínica Cleveland (55, institución que ha modificado muchos de los tradicionales principios de radicalidad en la cirugía del cáncer:

1. Todo paciente con cáncer gástrico es sometido a exploración quirúrgica;
2. Si la lesión es resecable, se emprende una operación "curativa", la cual comprende la
resección del tumor con márgenes suficientes, pero no excesivos, de tejido normal, tratando siempre de conservar un segmento de estómago proximal, y evitando la resección profiláctica del bazo, epiplones y órganos vecinos;
3. No se realiza la gastrectomía total sino en situaciones en las cuales ésta es la única forma de lograr la extirpación total del tumor, y nunca como terapia paliativa;
4. Se realizan grandes resecciones sólo para grandes cánceres, y se realizan pequeñas resecciones para tumores pequeños;
5. Cuando no es posible realizar una resección curativa, se procede con una resección paliativa si ésta es fácilmente realizable y no significa una resección heroica o masiva; específicamente se realizan resecciones paliativas para controlar hemorragia, obstrucción y dolor; nunca debe hacerse una gastrectomía total como procedimiento paliativo, y la gastroenterostomía, la gastrostomía o la yeyunostomía tienen muy escasa indicación en la paliación del cáncer gástrico.
6. Creemos que en última instancia el pronóstico del paciente depende del tipo y estado del tumor, de su rata de crecimiento y caracteristicas biológicas y de otros factores de la relación tumor/paciente, más que del tipo y la radicalidad del tratamiento quirúrgico empleado.

A aprendizagem interorganizacional via parcerias estratégicas colaborativas na indústria de biotecnologia brasileira, segmento de saúde humana

OpenAIRE

Antonio Décio Passos Estrella

2009-01-01

Esta pesquisa tem o objetivo de fazer um estudo exploratório e explicativo da evolução da colaboração interorganizacional na indústria de biotecnologia no Brasil entre os anos de 2004 e 2008. A população escolhida foi o conjunto de firmas dedicadas de biotecnologia brasileiras, segmento de saúde humana. Para o mapeamento da população foram utilizadas informações da Fundação Biominas, da Fundação Biorio, da ABRABI Associação Brasileira de Empresas de Biotecnologia, das Fundações de Amparo a ...

Conducta Innovadora en el Sector Industrial: El caso de Pequeñas y Medianas Empresas en Mar del Plata, Argentina (Innovating behavior in the Industrial Sector: Small and medium size enterprises in Mar del Plata, Argentina

Directory of Open Access Journals (Sweden)

Lucía Mercedes Mauro

2012-12-01

Full Text Available El cambio tecnológico es central en una estrategia de desarrolloeconómico endógeno, y su abordaje exitoso por partede las empresas requiere de un entorno a partir del que sepromueva y acompañe dicho proceso. El objetivo del estudioes comprender, desde una óptica territorial, la conducta innovadorade empresas industriales. Para ello se analiza el caso decuatro PYMES en segmentos con alto potencial de crecimientoeconómico de la ciudad de Mar del Plata (Argentina en el períodopost-convertibilidad. Se concluye que estas empresas tienenun marcado perfil innovador, aún cuando no se encuentraconsolidado el sistema de innovación local, falta de personalcon las competencias necesarias para llevar adelante el cambiotecnológico, y se observan desconexiones entre el sectorpúblico y el privado.   ABSTRACT Technological changes are paramount for an endogenous economicdevelopment programs, and require that companies developingit operate in an environment promoting and nurturing suchprograms. This study´s goal is to understand the innovation behaviorof industrial companies from a territorial point of view. To thatend we analyzed four SMEs operating, in a high economic growthsegment after the conversion period in Mar del Plata, Argentina.It was deduced that said companies possess an innovative profile(even despite the fact that the local innovation support system isnot fully consolidated, lack personnel with the appropriate knowledgeto pursue technological changes, and there are mismatchesbetween the private and public sectors.

In vitro study of antibiotic effect on bacterial adherence to acrylic intraocular lenses.

Science.gov (United States)

Gaál, Valéria; Kilár, Ferenc; Acs, Barnabás; Szijjártó, Zsuzsanna; Kocsis, Béla; Kustos, Ildikó

2005-11-10

Implantation of artificial intraocular lenses into the eye during ophthalmic surgical procedures ensures an unliving surface on which bacterial pathogens may attach and form biofilms. Despite antibiotic treatment bacteria growing in biofilms might cause inflammation and serious complications. In this study the adhesive ability of 7 Staphylococcus aureus and 11 coagulase-negative Staphylococcus (CNS) strains to the surface of acrylic intraocular lenses had been examined by the ultrasonic method. In untreated cases adhesion of the S. aureus and CNS strains did not differ significantly. We could not demonstrate significant differences between the adhesive ability of the standard strains and the clinical isolates. In this study a single--60 min long--antibiotic (ciprofloxacin and tobramycin) treatment had been applied, that correlate well with the single or intermittant antibiotic prophylaxis of patients. Ciprofloxacin administration was able to reduce significantly the number of attached cells on the surface of acrylic lenses both in the case of S. aureus and CNS strains. Dependence of the effect from concentration could also be demonstrated. Tobramycin treatment was able to inhibit significantly the attachment of S. aureus cells. Despite the debate on antibiotic prophylaxis we presented in our experiments that a single antibiotic administration can decrease the attachment of bacterial cells to the surface of acrylic intraocular lenses, and might be effective in the prevention of postoperative endophthalmitis, that is a rare but serious complication of ophthalmic surgery.

Assessment of intraocular pressure in chinchillas of different age groups using rebound tonometry

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Flor Diana Yokoay Claros Chacaltana

2016-01-01

Full Text Available ABSTRACT: The aim of this research was to measure the intraocular pressure (IOP of normal chinchilla eyes using the rebound tonometer. A further aim was to assess whether there were differences in the values of intraocular pressure in relation to animals age, gender and time of day. Thirty-six chinchillas were divided into three groups of 12 chinchillas each, by age: Group I (2-6-month-old, Group II (20 and 34 months and Group III (37 and 135 months. Ophthalmic examination was performed previously by Schirmer tear test, slit lamp biomicroscopy, indirect ophthalmoscopy and fluorescein test in all chinchillas. Three measurements of intraocular pressure were assessed on the same day (7, 12 and 19h. Tonometry was performed on both eyes using the rebound tonometer after calibration in "p" mode. Statistical analysis was performed with SigmaPlot for Windows. The mean IOP for groups I, II and III were 2.47±0.581mmHg, 2.47±0.581mmHg and 2.51±0.531mmHg, respectively. No significant differences were reported between age and IOP and no significant differences were reported between the time of day and IOP. The IOP in chinchillas did not differ significantly between genders or ages of the animals, and did not change with time of day.

Ceratoconjuntivite alérgica e complicações no segmento ocular anterior de pacientes Evaluation of anterior ocular segment complications in patients with allergic keratoconjunctivitis

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Patrícia Bezerra de Menezes Botelho

2003-01-01

Full Text Available INTRODUÇÃO: A alergia ocular é condição que pode ocasionar sintomas de coceira, ardor e lacrimejamento, podendo também ser ameaçadora para visão. A fisiopatologia envolve mecanismos de hipersensibilidade imunológica. Devido a fatores imunológicos, o segmento anterior destes pacientes está mais suscetível a alterações que ameaçam a acuidade visual, tais como: opacidades corneanas, ceratocone e catarata. MÉTODOS: Foram revistos, retrospectivamente, 186 pacientes com ceratoconjuntivite alérgica e selecionados pacientes que possuíam alterações de segmento anterior e acuidade visual menor ou igual a 0,6 corrigida em um ou ambos os olhos. A AV 0,6 foi escolhida aleatoriamente a fim de agrupar os pacientes. Estes pacientes foram analisados quanto à idade, sexo, tipo de alergia, tempo de aparecimento da doença (considerado como tempo de aparecimento de sintomas, tempo de latência (tempo que surgiu a complicação após o primeiro dia de atendimento, alterações sistêmicas, efeitos colaterais das drogas e complicações oculares. Estes pacientes não poderiam melhorar a AV com tratamento tópico e tinham acompanhamento mínimo de 3 meses. RESULTADOS: As alterações de segmento anterior que causaram AV menor ou igual a 0,6 (refração ou estenopeico sem possibilidade de melhora com medicação tópica foram: úlcera em escudo: 5 casos, catarata: 3 casos, opacidade corneana: 6 casos, perfuração ocular: 2 casos e ceratocone: 13 casos. CONCLUSÃO: Pacientes com ceratoconjuntivite alérgica podem ter como principais causas de baixa acuidade visual alterações de segmento anterior, entre elas, opacidades corneanas, ceratocone e catarata.PURPOSE: To evaluate complications of allergic keratoconjuctivitis that caused reduction in visual acuity to 0.6 or less and that could not solve with clinic treatment. METHODS: We analyzed retrospectively 186 charts and selected patients with visual acuity less than 0.6 on Snellen chart, associated

Rotationally asymmetric multifocal IOL implantation with and without capsular tension ring: refractive and visual outcomes and intraocular optical performance.

Science.gov (United States)

Alió, Jorge L; Plaza-Puche, Ana B; Piñero, David P

2012-04-01

To ascertain whether the refractive, visual, and intraocular optical quality outcomes of a rotationally asymmetric multifocal intraocular lens (IOL) are enhanced by the use of a capsular tension ring. Ninety consecutive eyes from 53 patients (age range: 36 to 82 years) were divided into two groups: the no ring group comprised 43 eyes implanted with the multifocal rotationally asymmetric Lentis Mplus LS-312 (Oculentis GmbH) without a capsular tension ring; and the ring group comprised 47 eyes with the same IOL with a capsular tension ring. Distance and near visual acuity and refractive outcomes were evaluated pre- and postoperatively. Contrast sensitivity, intraocular aberrations, and defocus curve were evaluated postoperatively. Significant postoperative differences between groups were found in sphere, spherical equivalent refraction, and near addition (P<.02). Regarding defocus curve, significantly better visual acuity was present in eyes with the capsular tension ring for intermediate vision conditions (P<.05). Intraocular aberrometry did not differ significantly between groups (P<.09). Refractive predictability and intermediate visual outcomes with the Lentis Mplus LS-312 IOL improved significantly when implanted in combination with a capsular tension ring. Copyright 2012, SLACK Incorporated.

Aplicación del modelo Servperf en los centros de atención Telcel, Hermosillo: una medición de la calidad en el servicio

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Luis Enrique Ibarra Morales

2015-01-01

Full Text Available La globalización de los mercados y la fuerte competencia en los sectores industriales han convertido la satisfacción de las necesidades de los clientes en un importante objetivo estratégico para las empresas que compiten por un segmento de mercado; el logro de esto supone una sólida ventaja competitiva en cuanto a la diferenciación en los servicios. Es importante mencionar que la mayoría de las veces el cliente tiene una sola oportunidad para evaluar un servicio en términos de calidad y satisfacción; en ese sentido, muchas empresas han desarrollado instrumentos para evaluar la calidad del servicio como parte de la mejora continua. El presente trabajo de investigación propone usar un cuestionario estandarizado de 15 ítems, mediante el modelo Servperf (Service Performance propuesto por Cronin y Taylor (1992, el cual recoge la percepción del cliente en el desempeño de la calidad del servicio otorgado. Se trabajó con los cinco centros de atención a clientes Telcel, localizados en Hermosillo, Sonora; el objetivo fue identificar qué factores determinan la satisfacción del cliente por medio de la calidad del servicio, aplicando el modelo Servperf, para demostrar si existe una relación positiva entre el servicio y el grado de satisfacción del cliente.

Apuntes para la dinamizacion turística del municipio de águilas, a partir de la interpretación del patrimonio

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R. Borrega

2000-01-01

Full Text Available Águilas, desde el punto de vista turístico, es un municipio cuyos recursos patrimoniales no están suficientemente aprovechados. Su oferta turística se ha basado siempre en productos y servicios relacionados con aspectos de sol y playa, es decir, alojamientos, restauración, comercios ... La única demanda de carácter cultural se da en el segmento de público que practica deportes náuticos y subacuáticos, y en el universitario, este último atraído por los cursos de verano que organiza la Universidad del Mar en el municipio. Todo esto da como resultado un bajo rendimiento económico y un estado de abandono de recursos patrimoniales de interés, así como de vida tradicional. En este trabajo se presentan unas posibilidades de actuación para dinamizar el sector turístico de la localidad y poner en valor su patrimonio cultural, partiendo de que cuenta con lo más importante, la afluencia de público y un amplio patrimonio que ofertar.

Clinical study of foldable intraocular lens secondary implantation after lens-vitrectomy in residual capsular with traumatic eyes

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Ru-Fa Meng

2015-07-01

Full Text Available AIM: To investigate the operation methods and clinical effects of foldable intraocular lens secondary implantation after lens-vitrectomy in residual capsular with traumatic eyes.METHODS: During January 2012 to January 2014, foldable intraocular lens was implanted on 47 cases following lens-vitrectomy in residual capsular with traumatic eyes 3～6mo. Follow-up period was 6～12mo, averaged(8.21±2.63mo. RESULTS:All of 47 eyes had successful operation at one time, and position deviation was not appeared. The naked vision of the last postoperative follow-up was(0.44±0.19. Compared with best corrected visual acuity(0.41±0.23, and There was no significant difference between visual acuity of preoperative and last follow-up period(t=0.879, P=0.342. No severe complication was found. CONCLUSION: Secondary implantation of foldable intraocular lens is a safe and reliable method for correcting ametropia after lens-vitrectomy in residual capsular with traumatic eyes.

Lessons learned: wrong intraocular lens.

Science.gov (United States)

Schein, Oliver D; Banta, James T; Chen, Teresa C; Pritzker, Scott; Schachat, Andrew P

2012-10-01

To report cases involving the placement of the wrong intraocular lens (IOL) at the time of cataract surgery where human error occurred. Retrospective small case series, convenience sample. Seven surgical cases. Institutional review of errors committed and subsequent improvements to clinical protocols. Lessons learned and changes in procedures adapted. The pathways to a wrong IOL are many but largely reflect some combination of poor surgical team communication, transcription error, lack of preoperative clarity in surgical planning or failure to match the patient, and IOL calculation sheet with 2 unique identifiers. Safety in surgery involving IOLs is enhanced both by strict procedures, such as an IOL-specific "time-out," and the fostering of a surgical team culture in which all members are encouraged to voice questions and concerns. Copyright © 2012 American Academy of Ophthalmology. Published by Elsevier Inc. All rights reserved.

Absorción renal de agua: del nefrón aislado a los canales de agua a Aquaporinas

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Guillermo Whittembury

1997-10-01

Full Text Available Se revisan brevemente: Los sitios de absorción del filtrado glomerular en diversos segmentos del nefrón, los sitios de acción de la hormona antidiurética (HAD, los conceptos que llevan a proponer que existen canales de agua en el túbulo renal proximal. llamados ahora Aquaporinas (AQP, algunas características biofísicas (diámetro equivalente y longitud del filtro de selectividad de la AQP-l en el túbulo renal proximal, estructura molecular de las AQP, algunas características de las AQP- 1-5, localización de las AQP 1-4 en el nefrón y algunos ejemplos de "fisiopatología molecular", que muestran que fallas genéticas en etapas de la acción de HAD en los túbulos colectores de los nefrones permiten describir varias formas de "diabetes insípida" renal. Hay métodos para dosar AQP-2 en orina. Esto simplificará el diagnóstico diferencial entre diversas formas de diabetes insípida. Estos hallazgos han sido posibles por los avances recientes en la biología molecular de las AQP. Sólo se citan algunas referencias críticas. (Rev Med Hered 1997; 8: 158-161

Could White Coat Ocular Hypertension Affect to the Accuracy of the Diagnosis of Glaucoma? Relationships Between Anxiety and Intraocular Pressure in a Simulated Clinical Setting.

Science.gov (United States)

Méndez-Ulrich, Jorge Luis; Sanz, Antoni; Feliu-Soler, Albert; Álvarez, María; Borràs, Xavier

2018-03-01

Sixty-one healthy subjects participated in a laboratory study carried out in a simulated clinical setting. Anticipatory anxiety-state was assessed at the arrival and immediately after, with no brief phase of adaptation, measurements of intraocular pressure, heart rate, systolic and diastolic blood pressure were collected. At the end of the procedure, anxiety-trait was also assessed. Results suggest that high levels of both anxiety-state and anxiety-trait significantly predicted a clinically relevant increase of intraocular pressure. Anxiety-state mediated the relationship between anxiety-trait and intraocular pressure, which also was found to be related with heart rate but not related to both systolic and diastolic blood pressure. These results suggest a common mechanism of regulation underlying anxiogenic variability found on both intraocular pressure and heart rate. A reduction in parasympathetic activity appears as a possible mechanism underlying to this phenomenon. This anxiety-enhanced intraocular pressure could be considered a phenomenon analogous to white coat hypertension found in the measurement of blood pressure; therefore, it probably should be taken into account in the clinical context to prevent errors in the diagnosis of glaucoma. Further research on cognitive and emotional regulation of intraocular pressure is needed to best characterize this hypothetical phenomenon.

Clinical research of phacoemulsification with posterior chamber intraocular lens implantation for glaucoma with different goniosynechia ranges

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Qing-Yu Li

2016-02-01

Full Text Available AIM:To study the effect of phacoemulsification with posterior chamber intraocular lens implantation to treat glaucoma with different angle-closure range, which may provide a better way to treat the angle-closure glaucoma.METHODS:There were 47 cases(54 eyeswith angle-closure glaucoma, and all of them underwent phacoemulsification and posterior chamber intraocular lens implantation. According to the range of goniosynechia, these patients were divided into three groups:the eyes with the range of goniosynechia≤1/2 were group A(13 eyes; the eyes with 1/23/4 were group C(23 eyes. We observed the status of anterior chamber angle and the intraocular pressure(IOPof the three groups at 2wk after operations. RESULTS:Compared to the preoperative condition, the IOP of the three groups at 2wk after operations decreased significantly. The IOP reductions of group B and C were more significant than that of group A, and the differences were significant(PPP3/4 appeared in group B; in group C, there were 5 eyes with goniosynechia>3/4, 1 eye with disappeared anterior chamber, 3 eyes with corneal edema, 1 eye with choroidal hemorrhage. The differences of postoperative complication rate among the three groups was statistically significant(PPCONCLUSION:For patients with angle closure glaucoma who have mild to moderate goniosynechia, phacoemulsification with posterior chamber intraocular lens implantation is an effective way. After operations, their closed anterior angle reopened. But to the patients with severe adhesions, there are more complications after operations, especially the glaucoma may reoccur.

Simple technique to treat pupillary capture after transscleral fixation of intraocular lens.

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Jürgens, Ignasi; Rey, Amanda

2015-01-01

We describe a simple surgical technique to manage pupillary capture after previous transscleral fixation of an intraocular lens. Neither author has a financial or proprietary interest in any material or method mentioned. Copyright © 2015 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved.

Subluxação congênita do cristalino: resultados visuais e posição das lentes intraoculares após a cirurgia Congenital lens subluxation: visual acuity outcomes and intraocular lens postoperative position

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Caroline Arraes

2010-04-01

Full Text Available OBJETIVO: Avaliar os resultados visuais e investigar, através da biomicroscopia ultrassônica, o posicionamento das lentes intraoculares e do anel endocapsular em 17 olhos de 10 portadores de subluxação congênita do cristalino, submetidos à mesma técnica cirúrgica pelo mesmo cirurgião. MÉTODOS: O estudo foi realizado no Hospital de Olhos de Pernambuco e Fundação Altino Ventura. A técnica cirúrgica consistiu em facoaspiração com implante de anel endocapsular e de lentes intraoculares com amputação de uma das alças. A idade variou entre 7 e 22 anos. Foram coletados dados sobre acuidade visual para longe pré e pós-operatória, tempo de seguimento após a cirurgia e complicações. Os pacientes foram submetidos à biomicroscopia ultrassônica. RESULTADOS: O tempo de seguimento médio foi de 2,8 anos. Houve melhora da acuidade visual para longe nos 17 (100% olhos: 12 olhos (70,6% apresentaram acuidade visual para longe melhor que 20/40; 4 (23,5% apresentaram acuidade visual para longe entre 20/40 e 20/100 e 1 (5,9% apresentou acuidade visual para longe pior que 20/100, porém melhor que acuidade visual para longe pré-operatória. A opacificação da cápsula posterior ocorreu em 10 olhos (58,9%. Na biomicroscopia ultrassônica observou-se que todas as lentes intraoculares estavam parcialmente descentralizadas, contudo sem atingir o bordo pupilar. Em todos os casos observou-se um adequado posicionamento do anel e um bom suporte capsular. CONCLUSÃO É possível concluir que o tratamento cirúrgico avaliado proporciona uma boa centralização das lentes intraoculares e do anel endocapsular, com melhora da acuidade visual para longe, sendo uma opção viável, eficaz e segura na reabilitação visual dos pacientes com subluxação congênita do cristalino.PURPOSE: To evaluate the visual acuity outcomes and to investigate the intraocular lens (IOL and endocapsular ring positions with ultrasound biomicroscopy in 17 eyes of 10 patients

Analysis of causes of intraocular lens explantations in the material of Department of Ophthalmology, Medical University of Lodz.

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Wilczyński, Michał; Wilczyńska, Olena; Omulecki, Wojciech

2009-01-01

Implantation of intraocular lenses (IOLS) has become a standard practice in cataract surgery, however, similar to any other type of surgery, using IOLs is not complication-free and sometimes explantation of intraocular lenses may be necessary. This study was to gather data and analyze causes of intraocular lens explantations, performed in the Department of Ophthalmology, Medical University of Łódź. The data were gathered from medical documentation of all patients who underwent intraocular lens removal from January 2003 to July 2006. The examined group consisted of 16 patients (16 eyes): 9 women (fraction 0.56), and 7 men (fraction 0.44), at the age from 21 to 82 years (mean age 62.4 years, SD +/- 15.5). In all patients IOL explantation was performed under local, peribulbar anaesthesia. Two groups of patients were distinguished: patients who had an anterior chamber lens explanted (3 patients, fraction 0.19) and patients who underwent posterior chamber lens explantation (13 patients, fraction 0.81). Causes of AC IOL explantations were: vaulting of the IOL (1 eye, fraction 0.06), luxation of the IOL to the vitreous cavity (1 eye, fraction 0.06), and painful eyeball after anterior chamber lens implantation (1 eye, fraction 0.06). Causes of PC IOL explantations were: subluxation of the IOL (6 eyes, fraction 0.38), luxation of the lens to the vitreous cavity (3 eyes, fraction 0.19), luxation of the lens to the anterior chamber (1 eye, fraction 0.06), endophthalmitis (2 eyes, fraction 0.13) and incorrect lens power (1 eye, fraction 0.06). In the majority of eyes (n = 13, fraction 0.81) the removed implant was replaced by another intraocular lens, but 3 eyes (fraction 0.19) were left aphakic. We did not observe serious intra- or early postoperative complications which might influence the final result of the operation.

Efectos del ejercicio en la fisiología ocular

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Manuel Sillero Quintana

2007-06-01

Full Text Available Toda actividad física extrema implica variaciones de los parámetros fisiológicos del deportista. Este artículo hace un repaso de los cambios sistémicos que se producen en el organismo durante la práctica deportiva y que, desde un punto de vista racional, podrían influir en el funcionamiento del sistema visual como son los cambios en el sistema cardiovascular, respiratorio, o neuro-endocrino. Posteriormente, y basándose en una revisión bibliográfica, realiza un análisis de la influencia directa de la práctica de actividad física sobre el sistema visual, tanto en las habilidades visuales (agudeza visual o acomodación, por ejemplo, como en parámetros anatómicos y fisiológicos como el ángulo irido-corneal, los diámetros pupilares, la presión intraocular, el flujo coroidal, la perfusión ocular o el diámetro de los vasos sanguíneos oculares. El artículo finaliza apuntando algunas líneas de investigación de interés dentro del ámbito de la fisiología ocular durante la práctica de actividad física, y algunas sugerencias para los investigadores que trabajen en el área de la visión deportiva.

LONG-TERM INTRAOCULAR PRESSURE AFTER UNCOMPLICATED PARS PLANA VITRECTOMY FOR IDIOPATHIC EPIRETINAL MEMBRANE.

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Tognetto, Daniele; Pastore, Marco R; Cirigliano, Gabriella; DʼAloisio, Rossella; Borelli, Massimo; De Giacinto, Chiara

2017-11-16

To investigate long-term intraocular pressure trends after uncomplicated pars plana vitrectomy for idiopathic epiretinal membrane. Three hundred and sixty-eight eyes of 368 consecutive patients were enrolled. Changes in intraocular pressure 1, 3, 6, and 12 months after surgery and during the final follow-up visit were evaluated in vitrectomized eyes and nonvitrectomized fellow eyes. The median follow-up period was 36 months (range 12-92 months). Longitudinal data analysis evidenced a 2.5-mmHg (2.2 mmHg; 2.7 mmHg, 95% confidence interval) statistically significant difference in intraocular pressure 30 days after surgery between treated and fellow untreated eyes, gradually recovering to a not significant 0.2-mmHg (-0.1 mmHg; 0.4 mmHg, 95% confidence interval) difference within 26 months. The incidence of late-onset ocular hypertension was 5.7% (21 over 347, 2%; 12%, 95% confidence interval) without difference between the treated eyes and the group control. No significant difference in the incidence of late-onset ocular hypertension and sex, lens status, or gauge of vitrectomy instruments was detected. Only patient's age was significantly higher (mean difference 4.2 years; 0.1-8.0 years, Monte Carlo, 95% confidence interval) in those who developed late-onset ocular hypertension in the vitrectomized eye. Uncomplicated pars plana vitrectomy for idiopathic epiretinal membrane seems not to increase the risk of late-onset ocular hypertension or open-angle glaucoma development.

Intraocular lens subluxation in a patient with facial atopic dermatitis.

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Yamazaki, S; Nakamura, K; Kurosaka, D

2001-02-01

A 66-year-old Japanese man presented with subluxation of a posterior chamber intraocular lens (IOL) caused by a rupture of part of Zinn's zonule but no retinal break 2 years after phacoemulsification with IOL implantation. He had a history of atopic dermatitis since infancy. This case presents a rare ocular complication of scratching and rubbing the face and eyelids because of itching related to atopic dermatitis.

Intraocular pressure measurements after conductive keratoplasty.

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Kymionis, George D; Naoumidi, Tatiana L; Aslanides, Ioannis M; Kumar, Vinod; Astyrakakis, Nikolaos I; Tsilimbaris, Miltiadis; Pallikaris, Ioannis G

2005-01-01

To determine the possible impact of conductive keratoplasty (CK) on intraocular pressure (IOP) measurements. A prospective, single-center, noncomparative interventional case series was performed. Baseline and postoperative IOPs were measured by Goldmann applanation tonometry in 32 eyes of 18 patients who underwent CK for hyperopia correction. Mean follow-up was 11.9 months (range: 8 to 18 months). After CK, a statistically significant decrease in the measured IOP was observed (before CK: 14.22+/-1.64 vs after CK: 12.66+/-2.21, P<.001). The change in IOP readings postoperatively was not correlated with age, sex, keratometric readings, or attempted correction. Despite the limitations due to the small number of patients enrolled in this study, the applanation tonometer appears to underestimate the true IOP after CK.

Improved accuracy of intraocular lens power calculation with the Zeiss IOLMaster.

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Olsen, Thomas

2007-02-01

This study aimed to demonstrate how the level of accuracy in intraocular lens (IOL) power calculation can be improved with optical biometry using partial optical coherence interferometry (PCI) (Zeiss IOLMaster) and current anterior chamber depth (ACD) prediction algorithms. Intraocular lens power in 461 consecutive cataract operations was calculated using both PCI and ultrasound and the accuracy of the results of each technique were compared. To illustrate the importance of ACD prediction per se, predictions were calculated using both a recently published 5-variable method and the Haigis 2-variable method and the results compared. All calculations were optimized in retrospect to account for systematic errors, including IOL constants and other off-set errors. The average absolute IOL prediction error (observed minus expected refraction) was 0.65 dioptres with ultrasound and 0.43 D with PCI using the 5-variable ACD prediction method (p ultrasound, respectively (p power calculation can be significantly improved using calibrated axial length readings obtained with PCI and modern IOL power calculation formulas incorporating the latest generation ACD prediction algorithms.

Net technique for intraocular lens support in aphakia without capsular support.

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De Novelli, Fernando José; Neto, Theodomiro Lourenço Garrido; de Sena Rabelo, Gabriel; Blumer, Marcel Eduardo; Suzuki, Ricardo; Ghanem, Ramon Coral

2017-01-01

This paper describes a modified surgical technique for intraocular lens implantation in aphakic eyes with no capsular support. Retrospective case series. Seventeen eyes of 17 aphakic patients with no capsule support underwent intraocular lens (IOL) implantation using a standardized technique in which a net was created at the ciliary sulcus plane with two threads forming a net pattern. The net was used as support for the IOL. Follow-up ranged from 6 to 38 months, with an average of 23 months. In all cases, the IOL was safely implanted and remained stable during the follow-up. In 16 eyes, the IOL remained well centered; in one eye, slight decentration was observed. Distance-corrected visual acuity improved by a mean of 4 lines, from 1.13 (LogMAR) to 0.52 (P = 0.01). This technique might be especially useful in cases of insufficient capsular support associated with tissue loss or iris atrophy. In these cases, iris fixation is not feasible; thus, the only surgical alternative is IOL scleral fixation.

Single suture iris-to-capsulorhexis fixation for in-the-bag intraocular lens subluxation.

Science.gov (United States)

Siegel, Michael J; Condon, Garry P

2015-11-01

We present a simplified modification to a technique for early or mild in-the-bag subluxation that avoids conjunctival and scleral incisions and minimizes intraocular manipulation. While the capsulorhexis edge is grasped with an intraocular forceps to stabilize the IOL-capsular bag complex, a 10-0 polypropylene suture on a long curved needle is used to secure the fibrotic superior capsulorhexis edge to the midperipheral iris at 12 o'clock using a combination of a modified McCannel suture and a Siepser sliding knot. Dr. Condon receives speaker and consultant fees from Alcon Surgical, Inc., Allergan, Inc., and Microsurgical Technology. Although the Microsurgical Technology Condon snare instrument is named after him, Dr. Condon reports no patents, fees, or payments related to it. Dr. Siegel has no financial or proprietary interest in any material or method mentioned. Copyright © 2015. Published by Elsevier Inc.

La calidad y el valor percibido en el transporte de mercancías en España y su importancia en la segmentación de clientes

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Irene Gil Saura

2015-10-01

Full Text Available En el estudio académico de las actividades logísticas y específicamente del transporte de mercancías, se ha señalado la influencia de la calidad del servicio en la generación y percepción de valor, así como la importancia de estos dos constructos en el proceso de evaluación del servicio en este entorno particular. En este trabajo se pretende identificar y caracterizar segmentos de empresas que prestan servicios de gestión del transporte internacional de mercancías (transitarias, con base en el valor que perciben del servicio recibido de sus principales proveedores de transporte de mercancías. A través de la realización de un análisis factorial exploratorio sobre una muestra de 205 empresas transitarias en España, se establece una propuesta de estructura multidimensional de la calidad del servicio; a partir de la aplicación del análisis de componentes principales categórico (CATPCA, se observan las relaciones entre los segmentos identificados y las diferentes variables, y dimensiones de la calidad que fueron identificadas, concluyéndose la existencia de una relación directa y positiva entre valor y calidad del servicio.

Clinical application of femtosecond laser assisted cataract surgery combined with triple-focus intraocular lens implantation in the treatment of cataract

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Qing-Song Gao

2018-02-01

Full Text Available AIM:To evaluate the effect of femtosecond laser assisted cataract surgery combined with triple-focus intraocular lens implantation in the treatment of cataract. METHODS: Totally 86 cases(106 eyesof patients with double cataract in our hospital from January 2016 to January 2017 were selected, including 49 cases(59 eyeswere set as the observation group(treated with femtosecond laser assisted phacoemulsification combined with triple-focus intraocular lens implantation, and 37 cases(47 eyeswere set as the control group(received traditional phacoemulsification combined with triple-focus intraocular lens implantation. Corneal endothelial cell density, cumulative dissipated energy(CDE, distant and near visual accommodation before and after operation were compared between the two groups, postoperative complications were observed. RESULTS: The preoperative corneal endothelial cell density of two groups had no significant difference(P>0.05. The corneal endothelial cell density of two groups significantly decreased at postoperative 1wk, with statistic significance within groups(PPPPPP>0.05. The incidence of glare and halo in the observation group was 10.2% and 8.5% in the control group, and are in the patients whose age was above 60 years old, there was no significant difference between the two groups(P>0.05. CONCLUSION: Femtosecond laser assisted cataract surgery combined with triple-focus intraocular lens implantation in the treatment of cataract can not only improve curative effect, but also provide high safety, while the adverse events including glare, halo and other adverse visual circumstances should be considered after triple-focus intraocular lens implantation.

The Comparison of the Influence of Thiopental and Propofol on Intraocular Pressure during Induction of Anesthesia in Intubated Patients under Cataracct Surgery

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Reza Sahraei

2016-07-01

Full Text Available The prevention of the increase of intraocular pressure and the further decrease of it during eye surgery has an impressive effect on the success of surgery. Some of the phases of the induction of anesthesia like laryngoscopy and tracheal intubation result in the increase of intraocular pressure and its consequences are dangerous for penetrating injuries of eyeball. The goal of this research is the comparison of the changes of intraocular pressure during the induction of anesthesia in completely same conditions by using thiopental and propofol and also the careful investigation of their influences on intraocular pressure in order to select the medicine that effectively decrease the intraocular pressure and prevent the increase of it after laryngoscopy and tracheal intubation. In this research, 88 patients were selected and they were randomly divided into 2 groups. In the beginning of the patients' anesthesia, both groups were preoxygenated and they simultaneously receive initial dose of atracurium (0/5 mg/kg and then initial dose of fentanyl (1-2 µg/Kg. After prescription of fentanyl, the induction of anesthesia in the first group was done withthiopental (4 mg/kg and in the second group with propofol (2/5 mg/kg and after that, atracurium intubation (0/7 mg/kg was prescribed. Intraocular pressure is measured in two phases before induction of anesthesia (with tetracaine eyedrop and 3 minutes after intubation (with schiotz tonometer and 3±0/75 degree of accuracy and by a person who is not aware of the kind of anesthesia. The patients are replicated in 2 experimental and control groups in terms of age and gender. The results of independent t-test show that there is no significant difference between 2 groups of thiopental and propofol in terms of systolic and diastolic blood pressure, heart beat and eye pressure before the induction of anesthesia (p-value>0,05. The results of independent t-test show that there is a significant difference between2

Competitividad y precarización del empleo: el caso de la industria del televisor en color en la frontera norte de México

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Ismael Aguilar Benítez

1998-01-01

Full Text Available Este trabajo analiza el proceso en el cual importantes compañías de la industria de la televisión se concentraron en la frontera norte de México. La disponibilidad y el bajo costo de la mano de obra, la proximidad física de mercados y las nuevas posibilidades que permiten los acuerdos de libre comercio de México con otros países permiten la competitividad de las empresas de esta industria en tres aspectos: acceso a los mercados de Estados Unidos y Latinoamérica, una respuesta rápida a variaciones en tiempo, calidad y patrones de consumo en el mercado y una disminución en los costos laborales. No obstante las grandes cantidades de trabajadores que requiere esta industria para sus crecientes inversiones, las características del proceso productivo han registrado la formación de recursos humanos con mayor calificación, estabilidad y mejor remuneración a un pequeño segmento de trabajadores.

Two cases of uveitis masquerade syndrome caused by bilateral intraocular large B-cell lymphoma

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Jovanović Svetlana

2013-01-01

Full Text Available Introduction. Sometimes it is not easy to clinically recognize subtle differences between intraocular lymphoma and noninfectious uveitis. The most common lymphoma subtype involving the eye is B-cell lymphoma. Case report. We presented two patients aged 59 and 58 years with infiltration of the subretinal space with a large B-cell non-Hodgkin intraocular lymphoma. The patients originally had clinically masked syndrome in the form of intermediate uveitis. As it was a corticosteroid-resistant uveitis, we focused on the possible diagnosis of neoplastic causes of this syndrome. During hospitalization, the neurological symptoms emerged and multiple subretinal changes accompanied by yellowish white patches of retinal pigment epithelium with signs of vitritis, which made us suspect the intraocular lymphoma. Endocranial magnetic resonance imaging established tumorous infiltration in the region of the left hemisphere of the cerebellum. The histopathological finding confirmed the diagnosis of large B-cell non-Hodgkin lymphoma of risk moderate degree, immunoblast - centroblast cytological type. The other patient had clinical chronic uveitis accompanied by yellowish shaped white echographic changes of the retina and localized changes in the level of the subretina. The diagnosis of lymphoma was made by brain biopsy. Conclusion. Uveitis masquerade syndrome should be considered in all patients over 40 years with idiopathic steroid-resistant uveitis. Treatment begun on time can affect the course and improve the prognosis of uveitis masquerade syndrome (UMS and systemic disease.

Associations with intraocular pressure across Europe: The European Eye Epidemiology (E-3) Consortium

NARCIS (Netherlands)

Khawaja, Anthony P.; Springelkamp, Henriët; Creuzot-Garcher, Catherine; Delcourt, Cécile; Hofman, Albert; Höhn, René; Iglesias, Adriana I.; Wolfs, Roger C. W.; Korobelnik, Jean-François; Silva, Rufino; Topouzis, Fotis; Williams, Katie M.; Bron, Alain M.; Buitendijk, Gabriëlle H. S.; Cachulo, Maria da Luz; Cougnard-Grégoire, Audrey; Dartigues, Jean-François; Hammond, Christopher J.; Pfeiffer, Norbert; Salonikiou, Angeliki; van Duijn, Cornelia M.; Vingerling, Johannes R.; Luben, Robert N.; Mirshahi, Alireza; Lamparter, Julia; Klaver, Caroline C. W.; Jansonius, Nomdo M.; Foster, Paul J.; Acar, Niyazi; Anastosopoulos, Eleftherios; Azuara-Blanco, Augusto; Bergen, Arthur; Bertelsen, Geir; Binquet, Christine; Bird, Alan; Brétillon, Lionel; Bron, Alain; Buitendijk, Gabrielle; Cachulo, Maria Luz; Chakravarthy, Usha; Chan, Michelle; Chang, Petrus; Colijn, Annemarie; Cumberland, Philippa; Cunha-Vaz, José; Daien, Vincent; Deak, Gabor; Delyfer, Marie-Noëlle; Hollander, Anneke den; Dietzel, Martha; Erke, Maja Gran; Fauser, Sascha; Finger, Robert; Fletcher, Astrid; Foster, Paul; Founti, Panayiota; Göbel, Arno; Gorgels, Theo; Grauslund, Jakob; Grus, Franz; Hammond, Christopher; Helmer, Catherine; Hense, Hans-Werner; Hermann, Manuel; Hoehn, René; Hogg, Ruth; Holz, Frank; Hoyng, Carel; Jansonius, Nomdo; Janssen, Sarah; Khawaja, Anthony; Klaver, Caroline; Le Goff, Mélanie; Leal, Sergio; Lechanteur, Yara; Lehtimäki, Terho; Lotery, Andrew; Leung, Irene; Mauschitz, Matthias; Merle, Bénédicte; Meyer Zu Westrup, Verena; Midena, Edoardo; Miotto, Stefania; Mohan-Saïd, Sadek; Muldrew, Alyson; Mueller, Michael; Nunes, Sandrina; Oexle, Konrad; Peto, Tunde; Piermarocchi, Stefano; Prokofyeva, Elena; Rahi, Jugnoo; Raitakari, Olli; Ribeiro, Luisa; Rougier, Marie-Bénédicte; Sahel, José; Salonikiou, Aggeliki; Sanchez, Clarisa; Schmitz-Valckenberg, Steffen; Schweitzer, Cédric; Segato, Tatiana; Shehata, Jasmin; Silvestri, Giuliana; Simader, Christian; Souied, Eric; Springelkamp, Henriet; Tapp, Robyn; Verhoeven, Virginie; Von Hanno, Therese; Vujosevic, Stela; Williams, Katie; Wolfram, Christian; Yip, Jennifer; Zerbib, Jennyfer; Zwiener, Isabella

2016-01-01

Raised intraocular pressure (IOP) is the most important risk factor for developing glaucoma, the second commonest cause of blindness globally. Understanding associations with IOP and variations in IOP between countries may teach us about mechanisms underlying glaucoma. We examined cross-sectional

Regulaciones públicas y explotación de renta de suelo: el boom inmobiliario de Ñuñoa, Santiago, 2000-2010

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Ernesto López-Morales

2015-01-01

Full Text Available Esta investigación presenta un análisis de la renovación urbana del área de Irarrázaval poniente, comuna de Ñuñoa, Santiago, que durante la década pasada experimentó una intensificación de producción privada residencial en altura orientada a segmentos medio-altos. Los resultados muestran el activo rol que juegan, a nivel local, las regulaciones estatales neoliberales en Chile para fijar el más intenso uso del suelo a explotarse exclusivamente por empresas inmobiliarias. Se muestra además el diferencial creciente de rentas de suelo capturadas entre empresas y residentes propietarios tradicionales, lo que implica gentrificación para un segmento minoritario de éstos.

Informações por Segmento: análise do nível de evidenciação das companhias listadas no novo mercado = Segment reporting: an analysis of the disclosure level of the companies listed on BM&F Bovespa’s new market

OpenAIRE

Camila Weschenfelder; Sady Mazzioni

2014-01-01

As normas internacionais de Contabilidade contribuíram para melhorar o nível de transparência das demonstrações financeiras, disponibilizando informações gerenciais, como as informações por segmento. A pesquisa objetivou verificar o nível de evidenciação do CPC 22 – Informações por segmento – das demonstrações contábeis intermediárias,analisando 127 companhias listadas no Novo Mercado da BM&F Bovespa. A verificação deu-se por meio da análise de conteúdo e posteriormente pelo modelo de regress...

Informações por Segmento: análise do nível de evidenciação das companhias listadas no novo mercado = Segment reporting: an analysis of the disclosure level of the companies listed on BM&F Bovespa’s new market

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Camila Weschenfelder

2014-08-01

Full Text Available As normas internacionais de Contabilidade contribuíram para melhorar o nível de transparência das demonstrações financeiras, disponibilizando informações gerenciais, como as informações por segmento. A pesquisa objetivou verificar o nível de evidenciação do CPC 22 – Informações por segmento – das demonstrações contábeis intermediárias,analisando 127 companhias listadas no Novo Mercado da BM&F Bovespa. A verificação deu-se por meio da análise de conteúdo e posteriormente pelo modelo de regressão linear múltipla. Os resultados sinalizaram que companhias com emissão de ADR’s tendem a divulgar menos informações por segmento que as demais. Algumas companhias não citam o CPC 22 nas suas demonstrações contábeis e nenhuma evidenciou a Demonstração do Fluxo de Caixa por segmento.Poucas empresas investigadas citaram o grau de dependência dos principais clientes, o montante de investimentos contabilizados por equivalência patrimonial e a conciliação entre as informações por segmento e o balanço patrimonial. Companhias auditadas por Big Four apresentam menor nível de evidenciação do que as demais. Conclui-se que o nível de evidenciação de informações por segmento é baixo e distinto entre os setores. The international accounting standards have contributed to improve the financial statements transparency providing managing information, as the ones by segment. This research has aimed at checking the CPC 22 disclosure level – Segment reporting – from the intermediate financial statements of the 127 companies listed on BM&F Bovespa’s New Market. This checking has been performed by the Content Analysis and, further, by the Multiple Regression analysis Pattern. The results showed that the companies with ADR’s tend to disclosure less information about segment reporting than others. Some companies do not mention in their financial statements and none of them highlighted the Cash Flow Demonstration by

Recent decreasing frequency of enucleation for intraocular retinoblastoma in Upper Egypt

International Nuclear Information System (INIS)

Abdallh, A.M.

2006-01-01

To evaluate the efficacy of combined systematic chemotherapy (chemoreduction) and local ophthalmic therapy (LT) is preventing or delaying external beam radiotherapy (EBRT) and enucleation in patients with intraocular retinoblastoma. This was a prospective, nonrandomized, single-institution, clinical study. Twenty-eight patients (37 eyes) with newly diagnosed intraocular retinoblastoma were included in this study. Primary enucleation was performed for 7 eyes with advanced intraocular retinoblastoma at presentation before starting chemoreduction. Using Reese-Ellsworth (RE) staging for RB, the remaining 30 eyes were as follows: Two in group I, 3 in group II, 8 in group III, 7 in group IV, and 9 in group V. All the 30 eyes were initially treated with 6 cycles of chemoredution using vincristine, etoposide and carboplatin, repeated every three weeks. After total of 6 cycles, each tumor was re-evaluated decide on the next mode of therapy. In cases where the tumor was reduced enough, LT (Thermotherapy, or cryotherapy, but plaque radiotherapy was unavailable) was applied. In cases where the tumor was reduced but insufficient for LT, we added another 3 cycles of same regimen in some patients; or we performed chemotherapy (CTT) for others, according to size of the residual tumor. Eyes failed to respond to tochemorduction and LT, received EBRT or were enucleated. Following 6 cycles of chemoreduction, all tumors showed an initial regression, and all vitreous and subretinal seeds showed calcification or disappearance of most of them. Among the 30 eyes, 12 eyes achieved complete response (CR), and 18 eyes achieved partial response (PR). Only 7 eyes (stage I to III) showed sufficient reduction of tumor size for the LT to be applied for, for which, TTT (4 eyes), and cryotherapy (3 eyes) were performed. Chemotherapy (CTT) was performed for 9 patients (13 eyes, 15 tumors). At the end of follow-up period, 14 of the total 30 eyes (46.7%) could not be salvaged with chemoreduction and LT

E-Commerce no Brasil: Se o Segmento é Promissor, Por Que Empresas Atuantes Estão no Vermelho?

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Adriana Serafim dos Santos

2015-04-01

Full Text Available A mudança de perfil dos novos consumidores tem exigido das organizações inovação em suas operações. Nesse contexto, uma nova modalidade de negócios tem modificado o cenário brasileiro, o e-commerce. Este segmento está em pleno crescimento, com projeções elevadas de faturamento (EBIT, 2013. No entanto, um paradoxo tem intrigado pesquisadores da área. Se o segmento é promissor, por que as empresas do ramo têm resultados negativos? Diante disso, o objetivo do estudo foi verificar o que revela a análise das demonstrações contábeis sobre o desempenho econômico-financeiro da B2W Digital (que atua no varejo on-line em comparação com outras empresas classificadas no mesmo setor na BM&FBovespa (atuantes no varejo tradicional. Na plataforma teórica foram discutidos os principais indicadores financeiros e econômicos e apresentado um histórico sobre o e-commerce no Brasil. Posteriormente foi realizada análise documental nas demonstrações contábeis das referidas empresas no período de 2007 a 2012. Foi constatado que as principais causas para o baixo desempenho da B2W Digital no período analisado foram: desequilíbrio na gestão dos prazos médios, ou seja, a organização paga seus fornecedores em prazos bem menores do que recebe de seus clientes, por isso a necessidade de financiar sua operação com recursos onerosos de curto prazo, principalmente empréstimos e antecipações de recebíveis, o que acarreta em despesas com taxas e juros; elevado grau de endividamento; baixa margem bruta, devido ao custo da mercadoria vendida que consome mais de 70% de sua receita líquida; e, finalmente, aumento das despesas operacionais, principalmente em distribuição.

Combined Acute Haemolytic and Secondary Angle Closure Glaucoma following Spontaneous Intraocular Haemorrhages in a Patient on Warfarin

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Walter Andreatta

2016-11-01

Full Text Available Background: To report the first described case of combined haemolytic and acute angle closure glaucoma secondary to spontaneous intraocular haemorrhages in a patient on excessive anticoagulation. To the best of our knowledge, this is the first case reported in the literature presenting with raised intraocular pressure due to both mechanisms. Case Description: A 90-year-old woman presented with acute pain and reduction in vision in the left eye. Her intraocular pressure (IOP was 55 mm Hg. There were red tinted blood cells in the anterior chamber giving it a reddish hue. The patient was known to have advanced wet macular degeneration. She was taking oral warfarin for atrial fibrillation. Her international normalised ratio (INR was 7.7. B-scan ultrasound of posterior segment showed vitreous and suprachoroidal haemorrhages. An ultrabiomicroscopic examination confirmed open angles. A diagnosis of haemolytic glaucoma secondary to intraocular haemorrhages was made. The IOP was controlled medically. Warfarin was withdrawn and oral vitamin K therapy was initiated leading to a rapid INR reduction. Three days later, her anterior chamber became progressively shallower causing a secondary acute angle closure which was managed medically. After 2 months, the left IOP was well-controlled without any medications and the eye was not inflamed. Her vision in that eye remained perception of light. Conclusion: Patients with suprachoroidal haemorrhages should be closely monitored as they might subsequently develop acute angle closure despite an initially open angle and well-controlled INR and IOP. Excessive anticoagulation needs to be prevented to minimise the risk of sight-threatening complications.

Effect of Topical Calcium Channel Blockers on Intraocular Pressure in Steroid-induced Glaucoma.

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Ganekal, Sunil; Dorairaj, Syril; Jhanji, Vishal; Kudlu, Krishnaprasad

2014-01-01

To evaluate the effect of 0.125% verapamil and 0.5% diltiazem eye drops on intraocular pressure (IOP) in steroid-induced glaucoma in rabbit eyes. A total of 18 rabbits with steroid-induced glaucoma were divided into three groups (A, B and C; n = 6 each). Right eyes in groups A, B and C received 0.5% diltiazem, 0.125% verapamil and 0.5% timolol eye drops twice daily for 12 days, respectively; whereas, left eyes received distilled water. IOP was measured with Tono-pen XL at baseline, day 4, day 8, and day 12 of treatment. Both 0.5% diltiazem and 0.125% verapamil eye drops significantly reduced IOP compared to control eyes (p cite this article: Ganekal S, Dorairaj S, Jhanji V, Kudlu K. Effect of Topical Calcium Channel Blockers on Intraocular Pressure in Steroid-induced Glaucoma. J Current Glau Prac 2014;8(1):15-19.

Mechanical properties of intra-ocular lenses

Science.gov (United States)

Ehrmann, Klaus; Kim, Eon; Parel, Jean-Marie

2008-02-01

Cataract surgery usually involves the replacement of the natural crystalline lens with a rigid or foldable intraocular lens to restore clear vision for the patient. While great efforts have been placed on optimising the shape and optical characteristics of IOLs, little is know about the mechanical properties of these devices and how they interact with the capsular bag once implanted. Mechanical properties measurements were performed on 8 of the most commonly implanted IOLs using a custom build micro tensometer. Measurement data will be presented for the stiffness of the haptic elements, the buckling resistance of foldable IOLs, the dynamic behaviour of the different lens materials and the axial compressibility. The biggest difference between the lens types was found between one-piece and 3-piece lenses with respect to the flexibility of the haptic elements

Técnica, Tecnología, Poshumanismo: la materia del texto

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Gonzalo Navajas

2015-11-01

Full Text Available El inicio de mi trabajo se concentra en la versión de la técnica propuesta por dos pensadores del siglo XX que son determinantes para el tema: Martín Heidegger y José Ortega y Gasset. Para Heidegger, arte, filosofía, ciencia y técnica son componentes compatibles y complementarios de un todo unitario que desarrolla las diversas formas del saber humano. Según Ortega y Gasset, la técnica amplía los recursos del ser humano y lo hace, además, de manera independiente del medio natural. La técnica genera una supra-naturaleza y hace a la humanidad más autónoma y poderosa. Frente a la versión inmanente del humanismo que propugnan Heidegger y Ortega y Gasset, Walter Benjamin propone una deslegitimación del homo universalisde raigambre filosófica y literaria clásica para abrirse a otra versión en la que el concepto de hombre es mudable y carece de una continuidad histórica fundada en el convencional e imperativo origen clásico.Estas conclusiones tienen consecuencias para la emergencia de un modo divergente de humanismo –un poshumanismo– que, sin negar la filiación clásica original, se separa de ella y la modifica con la inclusión de inflexiones diferentes. Concibo este poshumanismo como una nueva modulación integradora del pasado cultural que, alejándose de la disolución de la figura del autor y de la agencia única de la textualidad propia de Michel Foucault, no hace tabula rasa del archivo histórico y cultural. No parte de la nada absoluta en un devenir hacia un futuro carente de referentes previos legítimos. Por el contrario, este poshumanismo es una recomposición crítica de las vías previas del humanismo que se identifican con un yo sólido e inamovible. Además de diversas fuentes teóricas, utilizo como referentes prácticos de mi propuesta textos de Arturo Pérez-Reverte, Enrique Vila-Matas y Jaime Gil de Biedma. En Pérez-Reverte considero su reconstrucción de segmentos privilegiados del pasado histórico. Gil de

Resultados del tratamiento quirúrgico de la catarata traumática en edad pediátrica Results of the surgical treatment of traumatic cataract at pediatric ages

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Lucy Pons Castro

2010-12-01

Full Text Available OBJETIVO: Describir los resultados anatómicos y visuales de la cirugía de catarata traumática en niños. MÉTODOS: Se realizó un estudio descriptivo, retrospectivo, desde abril de 2006 hasta diciembre 2009 en el servicio de Oftalmología Pediátrica del Instituto Cubano de Oftalmología "Ramón Pando Ferrer". Se estudiaron 46 pacientes con edades entre los 3 y 14 años, diagnóstico de catarata traumática y agudeza visual mejor corregida menor de 0,4. Fue realizada la extracción extracapsular del cristalino con implante o no de lente intraocular. Se analizaron los resultados de la cirugía para lo que se tuvo en cuenta la anatomía, la agudeza visual mejor corregida preoperatoria y posoperatoria a los 4 meses, y las complicaciones posoperatorias inmediatas y tardías asociadas. RESULTADOS: La edad más vulnerable a presentar catarata traumática fue de 9 a 11 años (45,6 %. Etiológicamente predominó el trauma contuso, el ojo izquierdo y el sexo masculino. Se colocó lente intraocular en un 84,8 % de los pacientes, de estos los del tipo plegables fueron los más frecuentes. La agudeza visual mejor corregida poscirugía obtenida en 19 ojos (41,4 % estuvo entre 0,5-0,7 y en el 19,5 % por encima de 0,7. Entre las complicaciones inmediatas se destaca la membrana ciclítica más uveítis 39,1 % y en las tardías la deformidad pupilar 19,6 %. CONCLUSIONES: El tratamiento quirúrgico de la catarata traumática, con implante de lente intraocular constituye la mejor opción para el infante ya que produce buenos resultados visuales con mínimo de complicaciones, lo que permite una buena visión futura.OBJECTIVE: To describe the anatomical and visual results of the traumatic cataract surgery in children. METHODS: A retrospective descriptive study was carried out from April to December 2009 in the "Ramón Pando Ferrer" Cuban Institute of Ophthalmology pediatric ophthalmology service. Forty six patients were studied aged 3-14 years, diagnosed with

Comparison of current tonometry techniques in measurement of intraocular pressure.

Science.gov (United States)

Kouchaki, Behrooz; Hashemi, Hassan; Yekta, Abbasali; Khabazkhoob, Mehdi

2017-06-01

To compare four tonometry techniques: Goldmann applanation tonometer (GAT), Dynamic contour tonometer (DCT), Non-contact tonometer (NCT), and Ocular Response Analyzer (ORA) in the measurement of intraocular pressure (IOP) and the impact of some corneal biomechanical factors on their performance. In this cross-sectional study, volunteers with normal ophthalmic examination and no history of eye surgery (except for uncomplicated cataract surgery) or trauma were selected. Twenty-five subjects were male, and 21 were female. The mean age was 48 ± 19.2 years. Anterior segment parameters were measured with Scheimpflug imaging. IOP was measured with GAT, DCT, NCT, and ORA in random order. A 95% limit of agreement of IOPs was analyzed. The impact of different parameters on the measured IOP with each device was evaluated by regression analysis. The average IOP measured with GAT, DCT, NCT, and ORA was 16.4 ± 3.5, 18.1 ± 3.4, 16.2 ± 3.9, and 17.3 ± 3.4 mmHg, respectively. The difference of IOP measured with NCT and GAT was not significant ( P  = 0.382). Intraocular pressure was significantly different between GAT with DCT and IOP CC ( P  tonometers.

Application of polymerase chain reaction to differentiate herpes simplex virus 1 and 2 serotypes in culture negative intraocular aspirates

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Shyamal G

2005-01-01

Full Text Available Purpose: To standardize and apply a polymerase chain reaction (PCR on the glycoprotein D gene to differentiate Herpes simplex virus (HSV 1 & 2 serotypes in culture negative intraocular specimens. Methods: Twenty-one intraocular fluids collected from 19 patients were subjected to cultures for HSV and uniplex PCR (uPCR for DNA polymerase gene. To differentiate HSV serotypes, as 1 & 2, a seminested PCR (snPCR targeting the glycoprotein D gene was standardised and applied onto 21 intraocular fluids. The specificity of the snPCR was verified by application onto ATCC strains of HSV 1 and 2, clinical isolates and DNA sequencing of the amplified products. All specimens were also tested for the presence of cytomegalovirus (CMV and varicella zoster virus (VZV by nucleic acid amplification methods. Results: Four of the 21 intraocular fluids were positive for HSV by uPCR. snPCR detected HSV in three additional specimens (total of seven specimens, and identified three as HSV 1 and four as HSV 2. DNA sequencing of PCR products showed 100% homology with the standard strains of HSV 1 and 2 respectively. None of the samples were positive in culture. Among the other patients, CMV DNA was detected in two and VZV DNA in five others. Conclusions: The standardized snPCR can be applied directly onto the culture negative specimens for rapid differentiation of HSV serotypes.

Los atributos definitorios de una marca de lujo para los consumidores

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Sheila Liberal Ormaechea

2013-11-01

Full Text Available Objeto: El propósito de esta investigación es ahondar en el consumo del lujo desde el paradigma del consumo simbólico a través de una visión holística y multidimensional que nos permita contemplar su complejidad y conocer las percepciones de los consumidores universitarios.Diseño/metodología/enfoque: En el marco teórico se lleva a cabo una revisión bibliográfica del constructo de marca de lujo para, posteriormente, realizar un estudio empírico de naturaleza descriptiva y cuantitativa basado en la realización de un cuestionario a alumnos universitarios. El objetivo es conocer su percepción acerca de los atributos que sitúan a una marca en el segmento del lujo.Aportaciones y resultados: Los resultados de esta investigación contribuyen a la literatura existente sobre el lujo proporcionando una comprensión más completa y profunda del concepto. El estudio empírico realizado con alumnos universitarios facilita una idea de cuáles son sus percepciones acerca de la naturaleza de una marca de lujo.Limitaciones: El contexto socio-cultural y las características demográficas de la muestra limitan los resultados de la investigación a la categoría del lujo accesible o nuevo lujo no siendo generalizables al sector en su conjunto ni a otros segmentos de consumidores.Implicaciones prácticas: El conocimiento de la percepción del lujo por parte de los consumidores es fundamental para optimizar la gestión estratégica de este tipo de marcas. Los resultados obtenidos ofrecen una guía para el diseño de estrategias de comunicación y marketing dirigidas al público universitario aportando las dimensiones o características más relevantes del lujo para este segmento de consumidores.Implicaciones sociales: El diseño de la estrategia de marketing y comunicación para una marca supone el conocimiento exhaustivo de sus consumidores. Conocer las percepciones de los grupos sociales que configuran diferentes segmentos de mercado, supone el primer

[To exercise caution in developing intraocular lens exchange].

Science.gov (United States)

Song, X D; Wang, X Z; Qian, J

2018-05-11

Nowadays cataract extraction combined intraocular lens (IOL) implantation has become the conventional treatment for cataract. Numbers of IOL exchange after cataract extraction combined IOL implantation have been increasing in recent years. As a non-routine surgery, IOL exchange is normally combined with other surgeries and accompanied by some complications to various extents. Is IOL exchange necessary for all abnomal IOLs? Can IOL exchange be avoided? How to avoid IOL exchange? The purpose of this article is to stress the importance of indication of IOL exchange and how to avoid IOL exchange. (Chin J Ophthalmol, 2018, 54: 324-327) .

Management of subluxated capsular bag-fixated intraocular lenses using a capsular anchor

NARCIS (Netherlands)

Ton, Yokrat; Naftali, Modi; Lapid Gortzak, Ruth; Assia, Ehud I.

2016-01-01

We describe the use of the capsular anchor (AssiAnchor) to manage a subluxated intraocular lens (IOL) in the capsular bag. The anchor comprises 2 prongs that hold the anterior lens capsule and a central rod that is sutured to the scleral wall, enabling centration of the IOL-capsular bag complex. Six

Biopsy techniques for intraocular tumors

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Pukhraj Rishi

2016-01-01

Full Text Available Biopsy involves the surgical removal of a tissue specimen for histopathologic evaluation. Most intraocular tumors are reliably diagnosed based on the clinical evaluation or with noninvasive diagnostic techniques. However, accurately diagnosing a small percentage of tumors can be challenging. A tissue biopsy is thus needed to establish a definitive diagnosis and plan the requisite treatment. From fine-needle aspiration biopsy (FNAB to surgical excision, all tissue collection techniques have been studied in the literature. Each technique has its indications and limitations. FNAB has been reported to provide for 88-95% reliable and safe ophthalmic tumor diagnosis and has gained popularity for prognostic purposes and providing eye conserving treatment surgeries. The technique and instrumentation for biopsy vary depending upon the tissue involved (retina, choroid, subretinal space, vitreous, and aqueous, suspected diagnosis, size, location, associated retinal detachment, and clarity of the media. The cytopathologist confers a very important role in diagnosis and their assistance plays a key role in managing and planning the treatment for malignancies.

Study on the pathogenesis of transient intraocular pressure after laser iridectomy with Krypton laser combined with Q-switched Nd:YAG laser

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Zhi-Juan Pei

2017-12-01

Full Text Available AIM: To study the pathogenesis of transient intraocular pressure(IOPafter laser iridectomy with Krypton laser combined with Q-switched Nd:YAG laser. METHODS: Totally 42 healthy rabbits(84 eyesprovided by the Animal Experimental Center of our hospital were selected, including 18 female rabbits, 24 male rabbits, average weight 2.24±0.31kg, and they were randomly divided into 6 groups, 7 rats in each group(14 eyes. We observed the change of intraocular pressure after laser iridectomy surgery at 20min, 2, 6, 18, 24h and the nitric oxide(NO, malondialdehyde(MDA, superoxide dismutase(SOD, 6-keto-prostaglandin(6-keto-PGF1αand nitric oxide synthase(NOScontent in aqueous. RESULTS: There was no significant difference in intraocular pressure, NO, NOS, SOD, MAD and 6-keto- PGF1α before operation(P>0.05. The intraocular pressure increased after operation, and the difference was statistically significant(PP>0.05. The levels of NO, NOS and SOD in the aqueous humor of the two groups decreased 20min, 2 and 6h after the operation(PP>0.05. The levels of MDA and 6-keto-prostaglandin in the aqueous humor increased after the operation, and the difference was statistically significant at 20min, 2 and 6h after operation(PP>0.05.CONCLUSION: The increase of transient intraocular pressure after laser iridectomy may relate to the increase of malondialdehyde, 6-keto-prostaglandin content and the decrease of superoxide dismutase and nitric oxide in the aqueous humor after operation.

Seção áurea: um contexto para desenvolver a noção de incomensurabiblidade de segmentos de reta

OpenAIRE

Corbo, Olga

2005-01-01

O presente estudo foi realizado com o objetivo de contribuir para a formação inicial de professores de Matemática, propondo a utilização da seção áurea como contexto para explorar a noção de incomensurabilidade de segmentos de reta. Tomando como referencial teórico a noção de jogos de quadros , introduzida por Douady (1986) na Didática da Matemática e usando a metodologia de pesquisa denominada Engenharia Didática, desenvolvemos nosso trabalho com base na hipótese de que uma seqüência de ens...

Analysis of phakic before intraocular lens implantation for fundus examination

OpenAIRE

Juan Chen; Zhong-Ping Chen; Rui-Ling Zhu

2014-01-01

AIM:To investigate the findings of the eyes which were examined preoperatively by three mirror contact lens before the implantation of implantable collamer lens(ICL). To analysis the retinal pathological changes and to explore the clinical analysis of early diagnosis and treatment in retinopathy on fundus examination before operation. METHODS:The retrospective case series study included 127 eyes of 64 patients who underwent phakic intraocular lens implantation were received the fundus examina...

Dynamics of intraocular IFN-γ, IL-17 and IL-10-producing cell populations during relapsing and monophasic rat experimental autoimmune uveitis.

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Ulrike Kaufmann

Full Text Available A major limitation of most animal models of autoimmune diseases is that they do not reproduce the chronic or relapsing-remitting pattern characteristic of many human autoimmune diseases. This problem has been overcome in our rat models of experimentally induced monophasic or relapsing-remitting autoimmune uveitis (EAU, which depend on the inducing antigen peptides from retinal S-Antigen (monophasic EAU or interphotoreceptor retinoid-binding protein (relapsing EAU. These models enable us to compare autoreactive and regulatory T cell populations. Intraocular, but not peripheral T cells differ in their cytokine profiles (IFN-γ, IL-17 and IL-10 at distinct time points during monophasic or relapsing EAU. Only intraocular T cells concomitantly produced IFN-γ, IL-17 and/or IL-10. Monophasic EAU presented rising numbers of cells expressing IFN-γ and IL-17 (Th1/Th17 and cells expressing IL-10 or Foxp3. During relapsing uveitis an increase of intraocular IFN-γ+ cells and a concomitant decrease of IL-17+ cells was detected, while IL-10+ populations remained stable. Foxp3+ cells and cells expressing IL-10, even in combination with IFN-γ or IL-17, increased during the resolution of monophasic EAU, suggesting a regulatory role for these T cells. In general, cells producing multiple cytokines increased in monophasic and decreased in relapsing EAU. The distinct appearance of certain intraocular populations with characteristics of regulatory cells points to a differential influence of the ocular environment on T cells that induce acute and monophasic or relapsing disease. Here we provide evidence that different autoantigens can elicit distinct and differently regulated immune responses. IFN-γ, but not IL-17 seems to be the key player in relapsing-remitting uveitis, as shown by increased, synchronized relapses after intraocular application of IFN-γ. We demonstrated dynamic changes of the cytokine pattern during monophasic and relapsing-remitting disease

Cataract and keratoconus: minimizing complications in intraocular lens calculations.

Science.gov (United States)

Bozorg, Sara; Pineda, Roberto

2014-01-01

Patients with both cataract and keratoconus present unique challenges for the surgeon. Accurate keratometry (K) and axial length (AL) readings may be impossible, and uncertainty is introduced when estimating the corneal power for intraocular lens (IOL) selection. Different options on how to choose an IOL and how to manage irregular astigmatism of a keratoconic patient with cataract have been proposed and are reviewed. The stage of keratoconus and the history of the patient are both critical in determining the strategy used in treatment of cataracts.

Intraocular straylight and contrast sensitivity after contralateral wavefront-guided LASIK and wavefront-guided PRK for myopia.

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Barreto, Jackson; Barboni, Mirella T S; Feitosa-Santana, Claudia; Sato, João R; Bechara, Samir J; Ventura, Dora F; Alves, Milton Ruiz

2010-08-01

To compare intraocular straylight measurements and contrast sensitivity after wavefront-guided LASIK (WFG LASIK) in one eye and wavefront-guided photorefractive keratectomy (WFG PRK) in the fellow eye for myopia and myopic astigmatism correction. A prospective, randomized study of 22 eyes of 11 patients who underwent simultaneous WFG LASIK and WFG PRK (contralateral eye). Both groups were treated with the NIDEK Advanced Vision Excimer Laser System, and a microkeratome was used for flap creation in the WFG LASIK group. High and low contrast visual acuity, wavefront analysis, contrast sensitivity, and retinal straylight measurements were performed preoperatively and at 3, 6, and 12 months postoperatively. A third-generation straylight meter, C-Quant (Oculus Optikgeräte GmbH), was used for measuring intraocular straylight. Twelve months postoperatively, mean uncorrected distance visual acuity was -0.06 +/- 0.07 logMAR in the WFG LASIK group and -0.10 +/- 0.10 logMAR in the WFG PRK group. Mean preoperative intraocular straylight was 0.94 +/- 0.12 logs for the WFG LASIK group and 0.96 +/- 0.11 logs for the WFG PRK group. After 12 months, the mean straylight value was 1.01 +/- 0.1 log s for the WFG LASIK group and 0.97 +/- 0.12 log s for the WFG PRK group. No difference was found between techniques after 12 months (P = .306). No significant difference in photopic and mesopic contrast sensitivity between groups was noted. Intraocular straylight showed no statistically significant increase 1 year after WFG LASIK and WFG PRK. Higher order aberrations increased significantly after surgery for both groups. Nevertheless, WFG LASIK and WFG PRK yielded excellent visual acuity and contrast sensitivity performance without significant differences between techniques.

Combined ab interno trabeculotomy and lens extraction: a novel management option for combined uveitic and chronic narrow angle raised intraocular pressure.

Science.gov (United States)

Lin, Siying; Gupta, Bhaskar; Rossiter, Jonathan

2016-02-01

Minimally invasive glaucoma surgery is a developing area that has the potential to replace traditional glaucoma surgery, with its known risk profile, but at present there are no randomised controlled data to validate its use. We report on a case where sequential bilateral combined ab interno trabeculotomy and lens extraction surgery was performed on a 45-year-old woman with combined uveitic and chronic narrow angle raised intraocular pressure. Maximal medical management alone could not control the intraocular pressure. At 12-month follow-up, the patient had achieved stable intraocular pressure in both eyes on a combination of topical ocular antiglaucomatous and steroid therapies. This case demonstrates the effectiveness of trabecular meshwork ablation via ab interno trabeculotomy in a case of complex mixed mechanism glaucoma. 2016 BMJ Publishing Group Ltd.

Densiron® 68 as an intraocular tamponade for complex inferior retinal detachments

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Hussain RN

2011-05-01

Full Text Available Rumana N Hussain, Somnath BanerjeeLeicester Royal Infirmary, Leicester, UKIntroduction: Densiron® 68 is a high-density liquid used to tamponade inferior retinal detachments. We present a case series of 12 patients treated with Densiron as an intraocular tamponade agent.Methods: A retrospective analysis of 12 eyes in 12 patients was carried out. The primary endpoint was anatomic reattachment of the retina following removal of Densiron oil.Results: All patients had inferior detachments; 33% had associated proliferative vitreoretinopathy (PVR. Densiron was utilized as a primary agent in five patients (42%; the remaining patients had prior unsuccessful surgery for retinal reattachment, including pars plana vitrectomy, cryotherapy, laser, encirclement, gas (C3F8 or C2F6, or silicone oil. Eleven patients (91% had successful reattachment of the retina at 3 months following removal of Densiron; one patient had extensive PVR, total retinal detachment, preretinal macula fibrosis, and chronic hypotony, and surgical intervention was unsuccessful. Six patients (50% had raised intraocular pressure (IOP, resolving in the majority of cases following Densiron removal; two patients had long-term raised IOP requiring topical or surgical therapy. Of the six phakic patients, 50% developed significant cataract in the operated eye. Of those with successful retinal reattachment, visual outcome was variable, with 36% patients gaining two to four lines on Snellen, 27% remaining objectively the same, and 36% losing one to two lines.Conclusion: The anatomic success rate is high (91% in patients requiring Densiron tamponade for inferior retinal detachments with or without evidence of PVR either as a primary or secondary intervention. A common complication is raised IOP; however, this most often resolves following removal of the oil.Keywords: intraocular tamponade, silicone oil, retinal detachment, retinal reattachments

Effects of different levels of intraocular stray light on kinetic perimetry findings.

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Kazunori Hirasawa

Full Text Available To evaluate the effect of different levels of intraocular stray light on kinetic perimetry findings.Twenty-five eyes of 25 healthy young participants were examined by automated kinetic perimetry (Octopus 900 using Goldmann stimuli III4e, I4e, I3e, I2e, and I1e. Each stimulus was presented with a velocity of 3°/s at 24 meridians with 15° intervals. Four levels of intraocular stray light were induced using non-white opacity filter (WOF filters and WOFs applied to the clear plastic eye covers of the participants. The visual acuity, pupil diameter, isopter area, and kinetic sensitivity of each meridian were analyzed for each WOF density.Visual acuity deteriorated with increasing WOF densities (p < 0.01. With a visual acuity of 0.1 LogMAR units, the isopter areas for III4e, I4e, I3e, I2e, and I1e decreased by -32.7 degree2 (-0.2%, -255.7 degree2 (-2.6%, -381.2 degree2 (-6.2%, -314.8 degree2 (-12.8%, and -59.2 degree2 (-15.2%, respectively; kinetic sensitivity for those stimuli decreased by -0.1 degree (-0.1%, -0.8 degree (-1.4%, -1.6 degree (-3.7%, -2.7 degree (-9.7%, and -1.7 degree (-16.2%, respectively. The pupil diameter with each WOF density was not significantly different.Kinetic perimetry measurements with a high-intensity stimulus (i.e., III4e were unaffected by intraocular stray light. In contrast, measurements with the I4e, I3e, I2e, and I1e stimuli, especially I2e and I1e, were affected. Changes in the shape of the isopter resulting from opacity must be monitored, especially in cases of smaller and lower-intensity stimuli.

Intraocular methotrexate can induce extended remission in some patients in noninfectious uveitis.

Science.gov (United States)

Taylor, Simon R J; Banker, Alay; Schlaen, Ariel; Couto, Cristobal; Matthe, Egbert; Joshi, Lavnish; Menezo, Victor; Nguyen, Ethan; Tomkins-Netzer, Oren; Bar, Asaf; Morarji, Jiten; McCluskey, Peter; Lightman, Sue

2013-01-01

To assess the outcomes of the intravitreal administration of methotrexate in uveitis. Multicenter, retrospective interventional case series of patients with noninfectious uveitis. Thirty-eight eyes of 30 patients were enrolled, including a total of 54 intravitreal injections of methotrexate at a dose of 400 µg in 0.1 mL. The primary outcome measure was visual acuity. Secondary outcome measures included control of intraocular inflammation and cystoid macular edema, time to relapse, development of adverse events, and levels of systemic corticosteroid and immunosuppressive therapy. Methotrexate proved effective in controlling intraocular inflammation and improving vision in 30 of 38 eyes (79%). The side effect profile was good, with no reported serious ocular adverse events and only one patient having an intraocular pressure of >21 mmHg. Of the 30 eyes that responded to treatment, 8 relapsed, but 22 (73%) entered an extended period of remission, with the Kaplan-Meier estimate of median time to relapse for the whole group being 17 months. The eight eyes that relapsed were reinjected and all responded to treatment. One eye relapsed at 3 months, but 7 eyes again entered extended remission. Of the 14 patients on systemic therapy at the start of the study, 8 (57%) were able to significantly reduce this following intravitreal methotrexate injection. In patients with uveitis and uveitic cystoid macular edema, intravitreal MTX can effectively improve visual acuity and reduce cystoid macular edema and, in some patients, allows the reduction of immunosuppressive therapy. Some patients relapse at 3 to 4 months, but a large proportion (73%) enter an extended period of remission of up to 18 months. This larger study extends the results obtained from previous smaller studies suggesting the viability of intravitreal methotrexate as a treatment option in uveitis.

La población con discapacidad en los censos del siglo XX en Costa Rica

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Mariana Campos Vargas

2013-01-01

Full Text Available En este trabajo se logró conocer los criterios de clasificación empleados para definir a la población con discapacidad en los registros censales del siglo XX en Costa Rica y, por consiguiente, una aproximación a las formulaciones conceptuales para referirse al grupo en estudio. Además, se caracterizó a ese segmento poblacional a partir de diferentes variables: sexo, edad, estado civil y distribución geográfica. También se abordaron otros aspectos como fueron: alfabetismo, nivel de educación, ocupación, jefatura de hogar y vivienda. Entre los hallazgos más destacables se encuentra la permanencia, en los registros censales del siglo XX, de un concepto de discapacidad basado en la deficiencia, lo que definió los criterios de clasificación para esa población en esas fuentes. Asimismo se constató, por una parte, la asociación entre discapacidad e inequidad en esa centuria y, por la otra, la fragilidad de los vínculos de parentesco en ese grupo poblacional con respecto al conjunto de hogares de Costa Rica a fines de ese siglo. Las fuentes empleadas en esta investigación fueron los censos de población de Costa Rica del siglo XX. En el procedimiento con los datos, se llevó a cabo un análisis descriptivo de distribución de frecuencias.

Implantation of iris-claw Artisan intraocular lens for aphakia in Fuchs′ heterochromic iridocyclitis

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Ahmad Kheirkhah

2014-01-01

Full Text Available Implantation of iris-claw Artisan intraocular lens (IOL is a surgical option for correction of aphakia; however, these IOLs have not been used in eyes with uveitis including Fuchs′ heterochromic iridocyclitis (FHI due to possible risk of severe postoperative intraocular inflammation. In the case reported here, we secondarily implanted an Artisan IOL in a 28-year-old man with FHI who had aphakia with no capsular support due to a previous complicated cataract surgery. Enclavation was easily performed and no intraoperative complication was noted. Postoperative course was uneventful with no significant anterior chamber inflammation during 12 months of follow-up. Although there were few deposits on the IOL surface, the patient achieved a best-corrected visual acuity of 20/20 without developing glaucoma or other complications. Therefore, Artisan IOL may be considered for correction of aphakia in patients with FHI. However, studies on large number of patients are required to evaluate safety of the procedure.

Análisis de costos de las líneas de servicios de Phoenix English Institute”

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Rivarola, Natanael Kay

2015-01-01

PRESENTACION DEL PROYECTO - 1. Introducción - 2. Metodología - 3. Objetivos del trabajo - 4. Límites y alcance del trabajo - DESARROLLO DEL PROYECTO - Capítulo Nº 1: Marco Teórico del Trabajo. - 1. Contabilidad de Gestión y Contabilidad de Costos - 2. Costos - 2.1. Clasificación de costos - 3. Sistemas de Costeo - 4. Costeo Basado en Actividades - 4.1. Particularidades en PyMEs del sector servicios - 4.2. Pasos de aplicación - 5. Contribución Marginal - 6. Reportes por segmentos. - ...

Intraocular lens opacification after Descemet's stripping automated endothelial keratoplasty

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Meng-Sheng Lee

2017-01-01

Full Text Available Compared with conventional penetrating keratoplasty, Descemet's stripping automated endothelial keratoplasty (DSAEK more effectively maintain global integrity and rapid vision rehabilitation with less ocular surface disorders in patients with endothelial dysfunction. Here, we report a case of a 76-year-old woman who experienced opacification of a hydrophilic intraocular lens (IOL approximately 10 months after DSAEK. The patient with no history of systemic disease developed pseudophakic bullous keratopathy in the right eye 2 years after undergoing cataract surgery. The best-corrected visual acuity (BCVA of the right eye was Snellen 0.01 when presented to our hospital. DSAEK was arranged and performed smoothly. However, the graft detached over the upper part of the cornea on postoperative day 1. Thus, rebubbling was performed immediately. After the procedure, the graft was well attached, and the cornea became clear gradually. The BCVA returned to Snellen 0.6. However, progressive opacification over the anterior surface of the IOL was observed 10 months postoperatively. Vision deteriorated to 0.5 with various refractive errors during 2-year follow-up. IOL exchange may be considered if the vision is getting worse. IOL opacification may result from a direct contact between the IOL surface and exogenous air, particularly in a hydrophilic IOL, and can be a rare but significant complication after DSAEK. Clinicians planning to perform DSAEK should consider the composition of the IOL, the amount of intracameral air, duration of air filling, and high intraocular pressure.

Brachytherapy with cobalt plaques in the conservative treatment of intraocular tumors. The hospital A.C. camargo experience

International Nuclear Information System (INIS)

Trippe, N.; Novaes, P.E.R.S.; Ferrigno, R.; Pellizzon, A.C.; Fogarolli, R.C.; Maia, M.A.C.; Salvajoli, J.V.; Baraldi, H.E.; Chojniak, M.M.; Erwene, CM

1996-01-01

From December 1989 to December 1993, 76 cases of intraocular tumors, including 56 adult patients with uveal melanomas and 20 children with retinoblastoma, were treated with exclusive intraocular brachytherapy with Cobalt plaques. The goal was to keep the vision function and at same time not compromising the chance of cure. The dose prescribed was 40Gy, calculated at the apex of the lesion for retinoblastomas and 100 to 120Gy for uveal melanomas. With the minimum follow up of 24 months, of the 56 patients with uveal melanomas, 41 (73,3%) had their vision preserved and 15 (26,4%) had local failure and were underwent enucleation. With the medium follow up of 27 months, 17 (85,5%) of the patients with retinoblastoma had their vision preserved, while 3 (15%) had local failure and were treated by enucleation. The grade I and II complications occurred in 9 (42,8%) patients and 100% of them are with no evidence of systemic disease. When well indicated, the conservative treatment of intraocular tumors with brachytherapy is a good alternative to enucleation and must be done by a multidisciplinary and well trained medical professional group

CD5-Positive Primary Intraocular B-Cell Lymphoma Arising during Methotrexate and Tumor Necrosis Factor Inhibitor Treatment

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Kenji Nagata

2015-09-01

Full Text Available Purpose: To report a case of CD5+ primary intraocular B-cell lymphoma arising during methotrexate (MTX and tumor necrosis factor (TNF inhibitor treatment in a young patient with rheumatoid arthritis and uveitis. Case Presentation: A 39-year-old woman treated with MTX and a TNF inhibitor for rheumatoid arthritis and uveitis had steroid-resistant vitreous opacity. A vitreous sample was obtained by using diagnostic vitrectomy and was categorized as class V based on cytologic examination. Flow cytometric analysis of the vitreous sample revealed that abnormal cells were CD5+, CD10-, CD19+, CD20+ and immunoglobulin light-chain kappa+, suggesting the diagnosis of CD5+ primary intraocular B-cell lymphoma. Polymerase chain reaction (PCR detected immunoglobulin heavy-chain gene rearrangement. Epstein-Barr virus (EBV DNA was detected in the vitreous sample by using PCR, and immunohistochemistry revealed EBV latent membrane protein-1 expression in the abnormal cells infiltrating the vitreous. Optic nerve invasion was observed on magnetic resonance imaging. Conclusion: Primary intraocular lymphoma (PIOL may develop in patients receiving MTX and TNF inhibitor treatment. EBV infection may play an important role in the pathogenesis of PIOL arising during immunosuppressive therapy.

Genome-wide association study of intraocular pressure identifies the GLCCI1/ICA1 region as a glaucoma susceptibility locus

OpenAIRE

Strange, Amy; Bellenguez, Céline; Sim, Xueling; Luben, Robert; Hysi, Pirro G.; Ramdas, Wishal D.; van Koolwijk, Leonieke M.E.; Freeman, Colin; Pirinen, Matti; Su, Zhan; Band, Gavin; Pearson, Richard; Vukcevic, Damjan; Langford, Cordelia; Deloukas, Panos

2013-01-01

To discover quantitative trait loci for intraocular pressure, a major risk factor for glaucoma and the only modifiable one, we performed a genome-wide association study on a discovery cohort of 2175 individuals from Sydney, Australia. We found a novel association between intraocular pressure and a common variant at 7p21 near to GLCCI1 and ICA1. The findings in this region were confirmed through two UK replication cohorts totalling 4866 individuals (rs59072263, P(combined) = 1.10 × 10(-8)). A ...

Image-guided system versus manual marking for toric intraocular lens alignment in cataract surgery

NARCIS (Netherlands)

Webers, V.S.C.; Bauer, N.J.C.; Visser, N.; Berendschot, T.T.J.M.; van den Biggelaar, F.J.H.M.; Nuijts, R.M.M.A.

2017-01-01

Purpose To compare the accuracy of toric intraocular lens (IOL) alignment using the Verion Image-Guided System versus a conventional manual ink-marking procedure. Setting University Eye Clinic Maastricht, Maastricht, the Netherlands. Design Prospective randomized clinical trial. Methods Eyes with

Phacoemulsification with intraocular lens implantation in primary angle-closure suspect, primary angle-closure and primary angle-closure glaucoma with cataract

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Kun Zeng

2013-08-01

Full Text Available AIM: To evaluate the features and clinical outcomes of cataract extraction by phacoemulsification with intraocular lens implantation in primary angle-closure suspect(PACS, primary angle-closure(PACand primary angle-closure glaucoma(PACGwith cataract.METHODS:Phacoemulsification with intraocular lens implantation was performed on 86 cases(86 eyesdiagnosed as PACS, PAC and PACG co-existing cataract from January to December 2012. All cases were followed up for 3 months to 1 year. Pre-operative and post-operative visual acuity, intraocular pressure(IOP, gonioscopy, ultrasound biomicroscopy(UBM, visual field and usage of anti-glaucomaous eye drops were recorded.RESULTS:Zonular dialysis existed in 19 eyes(22%. The post-operative visual acuity improved in 84 eyes(98%. The post-operative visual acuity was CONCLUSION: PACS, PAC and PACG co-existing zonular dialysis is common. Phacoemulsification with IOL implantation can reduce IOP, deepen anterior chamber and open angle.

Implante intra-ocular de lentes dobráveis "piggyback" em paciente portador de catarata congênita no primeiro ano de vida: relato de caso Piggyback foldable intraocular lens implant in patient with congenital cataract in the first year of life: case report

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Leonardo Akaishi

2004-12-01

Full Text Available No presente relato os autores descrevem um caso de catarata congênita unilateral tratada cirurgicamente com implante intra-ocular de lentes dobráveis "piggyback", ainda não descrito na literatura nacional. São analisadas as diferenças e semelhanças com outros casos descritos na literatura.The authors report a case of congenital cataract, which was treated with piggyback foldable intraocular lens implant, not described in the Brazilian literature. The differences and similarities are analyzed with other reported cases in the literature.

Correlation of visual performance with quality of life and intraocular aberrometric profile in patients implanted with rotationally asymmetric multifocal IOLs.

Science.gov (United States)

Ramón, María L; Piñero, David P; Pérez-Cambrodí, Rafael J

2012-02-01

To examine the visual performance of a rotationally asymmetric multifocal intraocular lens (IOL) by correlating the defocus curve of the IOL-implanted eye with the intraocular aberrometric profile and impact on the quality of life. A prospective, consecutive, case series study including 26 eyes from 13 patients aged between 50 and 83 years (mean: 65.54±7.59 years) was conducted. All patients underwent bilateral cataract surgery with implantation of a rotationally asymmetric multifocal IOL (Lentis Mplus LS-312 MF30, Oculentis GmbH). Distance and near visual acuity outcomes, intraocular aberrations, defocus curve, and quality of life (assessed using the National Eye Institute Visual Functioning Questionnaire-25) were evaluated postoperatively (mean follow-up: 6.42±2.24 months). A significant improvement in distance visual acuity was found postoperatively (P<.01). Mean postoperative logMAR distance-corrected near visual acuity was 0.19±0.12 (∼20/30). Corrected distance visual acuity and near visual acuity of 20/20 or better were achieved by 30.8% and 7.7% of eyes, respectively. Of all eyes, 96.2% had a postoperative addition between 0 and 1.00 diopter (D). The defocus curve showed two peaks of maximum visual acuity (0 and 3.00 D of defocus), with an acceptable range of intermediate vision. LogMAR visual acuity corresponding to near defocus was directly correlated with some higher order intraocular aberrations (r⩾0.44, P⩽.04). Some difficulties evaluated with the quality of life test correlated directly with near and intermediate visual acuity (r⩾0.50, P⩽.01). The Lentis Mplus multifocal IOL provides good distance, intermediate, and near visual outcomes; however, the induced intraocular aberrometric profile may limit the potential visual benefit. Copyright 2012, SLACK Incorporated.

Evolución del mercado de la información electrónica: desde los orígenes hasta el auge del sector infomediario

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Hípola, Pedro

2015-06-01

Full Text Available Currently there is much talk about the so-called infomediary sector. This sector of the digital content industry has grown thanks to recent legal texts regulating the re-use of a portion of the information generated by the public sector. If we look at the list of firms in this sector, we see that many come from what has been known for decades as the electronic information industry. This paper describes the origin and development of this industry, both globally and within the Spanish context. It analyzes the processes and organizations that have helped to lay the foundations of this infomediary sector. When conducting this study we discovered very different trajectories and dynamics depending on which geographical areas are analyzed.En la actualidad se habla de la existencia del denominado sector infomediario, un segmento de la industria de los contenidos digitales cuyo crecimiento ha sido propiciado por los recientes textos legales que regulan la reutilización de una parte de la información generada por el sector público. Si se analiza el listado de empresas que componen este sector se observa que muchas de ellas proceden de lo que se ha conocido desde hace décadas con el nombre de industria de la información electrónica. En este artículo se analiza el nacimiento y desarrollo de esa industria, tanto a escala mundial como dentro del contexto español, para evaluar cuáles han sido los procesos y organizaciones que han servido para facilitar que se pongan las bases del llamado sector infomediario. Al realizar dicho estudio se observan trayectorias y dinámicas muy diferentes según cuál sea el ámbito geográfico que se considere.

[Possibility of 3D Printing in Ophthalmology - First Experiences by Stereotactic Radiosurgery Planning Scheme of Intraocular Tumor].

Science.gov (United States)

Furdová, A; Furdová, Ad; Thurzo, A; Šramka, M; Chorvát, M; Králik, G

Nowadays 3D printing allows us to create physical objects on the basis of digital data. Thanks to its rapid development the use enormously increased in medicine too. Its creations facilitate surgical planning processes, education and research in context of organ transplantation, individualization prostheses, breast forms, and others.Our article describes the wide range of applied 3D printing technology possibilities in ophthalmology. It is focusing on innovative implementation of eye tumors treatment planning in stereotactic radiosurgery irradiation.We analyze our first experience with 3D printing model of the eye in intraocular tumor planning stereotactic radiosurgery. 3D printing, model, Fused Deposition Modelling, stereotactic radiosurgery, prostheses, intraocular tumor.

Callus formation in vitro and internodal stem apices in savory = Calogênese in vitro de segmentos apicais caulinares e internodais em segurelha (Satureja hortensis L.

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Marcio Carlos Navroski

2012-12-01

Full Text Available We sought to evaluate with this work different growth regulators on callus formation in shoot apical and internodal stem segments of Satureja hortensis. The explants were isolated from in vitro seedlings and cultured on MS nutrient medium supplemented with NAA (0 and 1 μM and BAP (0, 5, 10, 15 and 20 μM. The presence of auxin NAA gave higher marks to the calluses at 30 days of evaluation, these notes also increased with the addition of BAP. There were significant interactions between factors in evaluating NAA and BAP for 60 days, both in apical stem segments as in internodal stem segments. To stemapices percentage of friable callus tends to decrease with increasing concentration of BAP. As for compact calluses increased BAP leads to an increase in the percentage of this type of callus. The presence of NAA increased callus formation in both friable and compact calluses on. This trend was also observed in internodal stem segments. The callus formation was highly rhizogenic observed in the presence of NAA, hardly occurs in the absence of auxin. The use of BAP is recommended in case of regeneration of plants through micropropagation, if the goal is the production of metabolites, the use of BAP can be harmful by reducing the production of friable callus.= Buscou-se com este trabalho avaliar diferentes reguladores de crescimento sobre a calogênese em segmentos caulinares apicais e internodais de Satureja hortensis L.. Os explantes foram isolados de plântulas germinadas in vitro e cultivados em meio nutritivo MS acrescido de ANA (0 e 1 μM e de BAP (0; 5; 10; 15 e 20 μM. A presença da auxina ANA proporcionou notas mais altas para os calos aos 30 dias de avaliação, estas notas também aumentaram com o acréscimo da citocinina BAP. Houve interações significativas entre os fatores ANA e BAP na avaliação aos 60 dias, nos dois tipos de segmentos caulinares(apicais e internodais. Nos segmentos apicais caulinares a porcentagem de calos fri

Variación de la posición del centro de gravedad en una bailaora profesional durante el zapateado flamenco

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Irene Baena-Chicón

2016-05-01

Full Text Available El centro de gravedad es el punto donde confluyen las fuerzas resultantes del peso de todos y cada uno de los segmentos corporales. El estudio de la trayectoria de este punto es de gran relevancia para determinar parámetros de carácter cinemáticos, dinámicos y el nivel de eficiencia en la ejecución del gesto técnico. El objetivo de este trabajo es estudiar con un sistema de captura del movimiento por cámaras de infrarrojo, la variación de posición del centro de gravedad de una bailaora profesional de baile flamenco durante un test de zapateado flamenco. Se trata de un estudio de caso único, una bailaora profesional de flamenco (33 años, 59 kg, 1.65m que ha ejecutado el test de zapateado ZAP-3, en el que se repiten secuencias de 6 zapateados con ambos pies durante 15 segundos. El test ha sido registrado con un sistema óptico de captura del movimiento Vicon (Oxford Metrics Ltd.; Oxford, UK compuesto por 5 vídeocámaras de infrarrojo. La participante portaba 35 marcadores colocados según una modificación del modelo de Golem. Entre los resultados obtenidos se encuentra el rango de movimiento de la trayectoria del centro de gravedad: 0.136 m en movimientos anteroposteriores, 0.105 m en laterales y 0.018 m en verticales. La trayectoria del centro de gravedad durante cualquier actividad guarda una estrecha relación con el gasto energético empleado y es especialmente importante en el baile flamenco. Los resultados obtenidos muestran oscilaciones suaves del centro de gravedad durante el zapateado en los tres planos. Esto refleja la estrategia del sujeto para optimizar el gasto energético gracias a una eficiente reequilibración corporal. El hecho de mantener una posición estable mientras se realizan zapateados a tan alta frecuencia, refleja una alta competencia de la bailaora que es profesional desde hace 17 años.

The effect of increased intra-abdominal pressure on orbital subarachnoid space width and intraocular pressure.

Science.gov (United States)

Liu, Su-Meng; Wang, Ning-Li; Zuo, Zhen-Tao; Chen, Wei-Wei; Yang, Di-Ya; Li, Zhen; Cao, Yi-Wen

2018-02-01

In accordance with the trans-lamina cribrosa pressure difference theory, decreasing the trans-lamina cribrosa pressure difference can relieve glaucomatous optic neuropathy. Increased intracranial pressure can also reduce optic nerve damage in glaucoma patients, and a safe, effective and noninvasive way to achieve this is by increasing the intra-abdominal pressure. The purpose of this study was to observe the changes in orbital subarachnoid space width and intraocular pressure at elevated intra-abdominal pressure. An inflatable abdominal belt was tied to each of 15 healthy volunteers, aged 22-30 years (12 females and 3 males), at the navel level, without applying pressure to the abdomen, before they laid in the magnetic resonance imaging machine. The baseline orbital subarachnoid space width around the optic nerve was measured by magnetic resonance imaging at 1, 3, 9, and 15 mm behind the globe. The abdominal belt was inflated to increase the pressure to 40 mmHg (1 mmHg = 0.133 kPa), then the orbital subarachnoid space width was measured every 10 minutes for 2 hours. After removal of the pressure, the measurement was repeated 10 and 20 minutes later. In a separate trial, the intraocular pressure was measured for all the subjects at the same time points, before, during and after elevated intra-abdominal pressure. Results showed that the baseline mean orbital subarachnoid space width was 0.88 ± 0.1 mm (range: 0.77-1.05 mm), 0.77 ± 0.11 mm (range: 0.60-0.94 mm), 0.70 ± 0.08 mm (range: 0.62-0.80 mm), and 0.68 ± 0.08 mm (range: 0.57-0.77 mm) at 1, 3, 9, and 15 mm behind the globe, respectively. During the elevated intra-abdominal pressure, the orbital subarachnoid space width increased from the baseline and dilation of the optic nerve sheath was significant at 1, 3 and 9 mm behind the globe. After decompression of the abdominal pressure, the orbital subarachnoid space width normalized and returned to the baseline value. There was no significant difference in the

UV laser ablation of intraocular lenses: SEM and AFM microscopy examination of the biomaterial surface

International Nuclear Information System (INIS)

Spyratou, E.; Asproudis, I.; Tsoutsi, D.; Bacharis, C.; Moutsouris, K.; Makropoulou, M.; Serafetinides, A.A.

2010-01-01

Several new materials and patterns are studied for the formation and etching of intraocular lenses (IOLs), in order to improve their optical properties, to reduce the diffractive aberrations and to decrease the incidence of posterior capsular opacification. The aim of this study is to investigate the use of UV (λ = 266 nm) laser pulses to ablate the intraocular lenses materials, and thus to provide an alternative to conventional surface shaping techniques for IOLs fabrication. Ablation experiments were conducted using various polymer substrates of hydrophobic acrylic IOLs and PMMA IOLs. We investigated the ablation efficiency and the morphology of the ablated area by imaging the surface modification with atomic force microscopy (AFM) and scanning electron microscopy (SEM). The morphological appearance of IOL samples reveals the effect of a photochemical and photothermal ablation mechanism.

UV laser ablation of intraocular lenses: SEM and AFM microscopy examination of the biomaterial surface

Energy Technology Data Exchange (ETDEWEB)

Spyratou, E., E-mail: ellas5@central.ntua.gr [National Technical University of Athens, School of Applied Mathematical and Physical Sciences, Department of Physics, Zografou Campus, Athens, 15780 (Greece); Asproudis, I. [Department of Ophthalmology, University Hospital of Ioannina, Ioannina, 45110 (Greece); Tsoutsi, D. [Department of Chemistry, University of Ioannina, Ioannina, 45110 (Greece); Bacharis, C.; Moutsouris, K.; Makropoulou, M.; Serafetinides, A.A. [National Technical University of Athens, School of Applied Mathematical and Physical Sciences, Department of Physics, Zografou Campus, Athens, 15780 (Greece)

2010-02-01

Several new materials and patterns are studied for the formation and etching of intraocular lenses (IOLs), in order to improve their optical properties, to reduce the diffractive aberrations and to decrease the incidence of posterior capsular opacification. The aim of this study is to investigate the use of UV ({lambda} = 266 nm) laser pulses to ablate the intraocular lenses materials, and thus to provide an alternative to conventional surface shaping techniques for IOLs fabrication. Ablation experiments were conducted using various polymer substrates of hydrophobic acrylic IOLs and PMMA IOLs. We investigated the ablation efficiency and the morphology of the ablated area by imaging the surface modification with atomic force microscopy (AFM) and scanning electron microscopy (SEM). The morphological appearance of IOL samples reveals the effect of a photochemical and photothermal ablation mechanism.

Iris-claw intraocular lenses to correct aphakia in the absence of capsule support.

Science.gov (United States)

De Silva, Samantha R; Arun, Kikkeri; Anandan, Maghizh; Glover, Nicholas; Patel, Chetan K; Rosen, Paul

2011-09-01

To evaluate the indications, postoperative visual efficacy, and complication rate after intraocular implantation of an iris-claw aphakic intraocular lens (IOL). Oxford Eye Hospital, Oxford, United Kingdom. Case series. This chart review comprised eyes with no capsule support that had anterior iris-fixation IOL implantation for aphakia between 2001 and 2009. The study comprised 116 eyes (104 patients). Iris-claw IOLs were inserted during primary lens surgery in 18 eyes (15.5%), during an IOL exchange procedure for dislocated posterior chamber IOLs in 19 eyes (16.4%), and as a secondary procedure in 79 eyes (68.1%). The mean follow-up was 22.4 months (range 3 to 79 months). The final corrected distance visual acuity (CDVA) was 6/12 or better in 68.9% of all eyes and in 47 of 53 eyes (88.7%) with no preoperative comorbidity. Complications included wound leak requiring resuturing in 2.6% of eyes, postoperative intraocular pressure rise in 9.5% of eyes (glaucoma escalation 0.8%), and cystoid macular edema in 7.7% of eyes (0.8% chronic). Iris-claw IOL subluxation occurred in 6.0% of eyes from 5 days to 60 months postoperatively; all the IOLs were repositioned. Corneal decompensation occurred in 1.7% of eyes; 0.8% had retinal detachments. Iris-claw IOL implantation for aphakia gave a good visual outcome and can be used for a wide range of indications. Postoperative complication rates were comparable to, if not better than, those with conventional anterior chamber IOLs. Correct implantation technique is critical in avoiding postoperative IOL subluxation. Copyright © 2011 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved.

Aderência bacteriana in vitro a lentes intra-oculares de polimetilmetacrilato e de silicone In vitro bacterial adherence to silicone and polymetylmethacrylate intraocular lenses

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Claudete Inês Locatelli

2004-04-01

Full Text Available OBJETIVOS: Verificar a aderência bacteriana a lentes intra-oculares de silicone e de polimetilmetacrilato como possível fator de risco no desenvolvimento de endoftalmite pós-operatória, utilizando-se um modelo in vitro com três microrganismos potencialmente patogênicos. MÉTODOS: As análises foram realizadas com cepas de Staphylococcus aureus ATCC 29213, Staphylococcus epidermidis (amostra clínica e Pseudomonas aeruginosa ATCC 27853 incluindo a determinação de curvas de crescimento, testes para verificação de produção de cápsula, avaliação da hidrofobicidade, testes de aderência a diferentes materiais, microscopia óptica, microscopia eletrônica de varredura e microscopia de força atômica. RESULTADOS: A produção de cápsula e a aderência das três diferentes cepas não mostraram qualquer relação com a quantidade de microrganismos; em relação às lentes intra-oculares de polimetilmetacrilato e de silicone, não houve diferença estatisticamente significativa na aderência de S. aureus e S. epidermidis; P. aeruginosa foi o microrganismo mais aderente a ambos os materiais. A microscopia eletrônica de varredura confirmou estes achados em relação à aderência, ao peso que a microscopia de força atômica evidenciou a produção de biofilme pelas cepas de S. aureus, S. epidermidis e P. aeruginosa. CONCLUSÕES: Constatou-se, in vitro, que os materiais analisados não diferiram com relação à taxa de aderência bacteriana, porém, P. aeruginosa apresentou maior eficiência de adesão entre as bactérias testadas. Todas as cepas produziram biofilme. Silicone foi o material mais hidrofóbico, quando comparado ao polimetilmetacrilato.PURPOSE: To evaluate bacterial adherence to silicone and polymetylmethacrylate (PMMA intraocular lenses as a risk factor for postsurgery endophthalmitis by using an in vitro model with three potentially pathogenic microorganisms. METHODS: In vitro experiments were carried out with the

Vitrectomía pars plana y reimplante de lente intraocular en surco Pars plana vitrectomy and intraocular lens repositioning in the sulcus

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Alejandro Guerra García

2010-01-01

Full Text Available Se presentó un caso de lente intraocular luxado a vítreo en paciente con conteo bajo de células endoteliales e intolerancia a lentes de contacto. Se practicó vitrectomía pars plana con reimplante de lente en surco ciliar con el objetivo de demostrar la fiabilidad de la técnica para casos que presenten condiciones adecuadas y situaciones especiales. Se revisó la bibliografía para conocer las tendencias actuales con respecto al manejo de esta patología. El paciente alcanzó una agudeza visual de 20/30. El lente permaneció estable en el surco 3 meses después de practicada la vitrectomía. El manejo de esta entidad debe ser personalizado. La técnica utilizada debe ser siempre la primera opción de tratamiento y parece ser segura en casos cuidadosamente escogidos.A case of dislocated intraocular lens moved to the vitreous cavity in a patient with low endothelial cell count and contact lens intolerance was reported. A pars plana vitrectomy with lens repositioning was performed to demonstrate the safety of this technique for some special cases under adequate conditions. The literature was reviewed to learn about the current management of this pathology. Finally, patient's best visual acuity was 20/30. The stability of the lens was confirmed three month l after the vitrectomy. Management of this disorder should be customized. This technique should be considered as the first option of treatment and seems to be safe in selected cases.

Procedimiento para elaborar una lente intraocular monofocal asférica isoplanática y lente obtenida empleando dicho procedimiento

OpenAIRE

Barbero, Sergio; Marcos, Susana; Dorronsoro, Carlos; Montejo, Javier; Salazar Salegui, Pedro

2010-01-01

Procedimiento para elaborar una lente intraocular monofocal asférica isoplanática y lente obtenida empleando dicho procedimiento. Permite obtener lentes oftálmicas monofocales asféricas isoplanáticas en un rango visual de hasta 25º (preferentemente hasta 10º) de amplitud. El procedimiento comprende las etapas de: 1.- Definición matemática de un modelo de ojo afáquico; 2.- Definición matemática de un modelo de lente intraocular; 3.- Definición matemática de la implantac...

Intra-Ocular Pressure Measurement in a Patient with a Thin, Thick or Abnormal Cornea.

Science.gov (United States)

Clement, Colin I; Parker, Douglas G A; Goldberg, Ivan

2016-01-01

Accurate measurement of intra-ocular pressure is a fundamental component of the ocular examination. The most common method of measuring IOP is by Goldmann applanation tonometry, the accuracy of which is influenced by the thickness and biomechanical properties of the cornea. Algorithms devised to correct for corneal thickness to estimate IOP oversimplify the effects of corneal biomechanics. The viscous and elastic properties of the cornea influence IOP measurements in unpredictable ways, a finding borne out in studies of patients with inherently abnormal and surgically altered corneal biomechanics. Dynamic contour tonometry, rebound tonometry and the ocular response analyzer provide useful alternatives to GAT in patients with abnormal corneas, such as those who have undergone laser vision correction or keratoplasty. This article reviews the various methods of intra-ocular pressure measurement available to the clinician and the ways in which their utility is influenced by variations in corneal thickness and biomechanics.

Trajetórias tecnológicas no segmento offshore: ambiente e oportunidades Technological trajectories in the offshore segment: enviroment and opportunities

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José Benedito Ortiz Neto

2008-08-01

Full Text Available Este artigo apresenta as diferentes trajetórias tecnológicas do segmento offshore na indústria petrolífera mundial considerando os seus principais aspectos e marcos constituintes. Mais especificamente, serão analisadas as trajetórias diferentes nas duas primeiras grandes províncias de petróleo do segmento offshore: o Golfo do México (EUA e o Mar do Norte (Europa. Junto com a Bacia de Campos (Brasil, são as mais produtivas e ricas do planeta e onde as três trajetórias tecnológicas foram desenvolvidas. Esse levantamento histórico é importante porque resgata os elementos que dão as bases do conhecimento tecnológico que permitiu à Petrobras, de forma inédita, iniciar as suas atividades offshore nas décadas de 1960-1970. Será visto aqui que a exploração offshore significou o surgimento de um novo paradigma tecnológico sustentado por três trajetórias.This article presents different technological trajectories concerning the offshore exploration segment in the world petroleum industry, considering their main aspects and components. More specifically, different trajectories will be analyzed in the first two largest crude oil territories: Gulf of Mexico (USA and Sea North (Europe. These, along with Bacia de Campos in Brazil, are the most productive and the richest regions in the planet and, therefore, where the three technological trajectories have been developed. This historic survey is important because it reveals the elements that provide the basis for technological knowledge, which allowed Petrobras to start its offshore activities in the 60s and 70s, via an original technology. The offshore exploration meant the emergence of a new technological paradigm supported by three trajectories.

Resultados del tratamiento quirúrgico en aneurismas intracraneales múltiples de la circulación anterior

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Armando Alemán Rivera

2001-09-01

Full Text Available Se realiza un análisis de 10 pacientes con aneurismas múltiples de la porción anterior del polígono de Willis, los cuales representan el 10 % de todos los pacientes con aneurismas operados en el Servicio de Neurocirugía del Hospital Universitario «Arnaldo Milián Castro» de Santa Clara, Villa Clara. En 2 pacientes, los sacos aneurismáticos se localizaban bilateralmente. En un enfermo, la operación fue unilateral, mientras que en el otro, donde los aneurismas se localizaban en ambas arterias cerebrales medias, segmento M2 (aneurismas en espejo, el abordaje se realizó en 2 tiempos quirúrgicos. Todos los sacos aneurismáticos se presillaron y se reportó una mortalidad del 10 %An analysis of 10 patients with multiple aneurysms of the anterior portion of the circle of Willis that accounted for 10 % of all patients with aneurysms operated on at the Neurosurgery Service of "Arnaldo Milián Castro" Teaching Hospital of Santa Clara, Villa Clara, was made. The aneurysmatic sacs were bilaterally located in 2 patients. In one patient, the operation was unilateral, whereas in the other one, in whom the aneurysms were located in both middle cerebral arteries, M2 segment (mirror aneurysms, the operation was performed in 2 surgical times. All the aneurysmatic sacs were stapled and a 10 % mortality was re

Phakic iris-fixated intraocular lens placement in the anterior chamber: effects on aqueous flow.

Science.gov (United States)

Repetto, Rodolfo; Pralits, Jan O; Siggers, Jennifer H; Soleri, Paolo

2015-05-01

Phakic intraocular lenses (pIOLs) are used for correcting vision; in this paper we investigate the fluid dynamical effects of an iris-fixated lens in the anterior chamber. In particular, we focus on changes in the wall shear stress (WSS) on the cornea and iris, which could be responsible for endothelial and pigment cell loss, respectively, and also on the possible increase of the intraocular pressure, which is known to correlate with the incidence of secondary glaucoma. We use a mathematical model to study fluid flow in the anterior chamber in the presence of a pIOL. The governing equations are solved numerically using the open source software OpenFOAM. We use an idealized standard geometry for the anterior chamber and a realistic geometric description of the pIOL. We consider separately the main mechanisms that produce fluid flow in the anterior chamber. The numerical simulations allow us to obtain a detailed description of the velocity and pressure distribution in the anterior chamber, and indicated that implantation of the pIOL significantly modifies the fluid dynamics in the anterior chamber. However, lens implantation has negligible influence on the intraocular pressure and does not produce a significant increase of the shear stress on the cornea, while the shear stress on the iris, although increased, is not enough to cause detachment of cells. We conclude that alterations in the fluid dynamics in the anterior chamber as a result of lens implantation are unlikely to be the cause of medical complications associated with its use.

Evaluación del potencial para el desarrollo de turismo sostenible en el corregimiento de Taganga, distrito de Santa Marta (Colombia

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Camilo Botero

2010-11-01

Full Text Available El turismo es la actividad económica más dinámica en Colombia. Dentro del Distrito de Santa Marta se encuentran dos de los tres mayores atractivos del país, según la guía Lonely Planet. Por su parte, el corregimiento de Taganga, que hace parte de Santa Marta, ha experimentado un importante crecimiento turístico en los últimos 15 años, pero desordenado y espontáneo. Este artículo busca evaluar la potencialidad que tiene Taganga, como pequeño destino turístico, de implementar un modelo de turismo sostenible. La metodología combinó una profunda recolección de información primaria, con diversos métodos para identificación y valoración del inventario turístico, descripción de las características actuales y tendencias del mercado turístico, evaluación de la imagen del destino turístico, identificación de impactos ambientales, evaluación de la sostenibilidad de la oferta turística, análisis de competitividad del destino y análisis del desarrollo turístico de acuerdo con el modelo TALC. Entre los principales resultados se destaca la baja sostenibilidad del modelo actual de turismo, acompañado de una irregular satisfacción de los turistas por los servicios y atractivos del corregimiento. Se identificaron cuatro segmentos turísticos en Taganga: a. mochileros (backpackers, b. turistas independientes, c. turistas nacionales y d. visitantes. Además, en el estudio se determinó que los turistas de naturaleza suave son los más deseables. Otro resultado para destacar es el mantenimiento constante de la imagen, a pesar de que Taganga haya cambiado sustancialmente en los últimos 15 años. Finalmente, se realizan recomendaciones para aprovechar las potencialidades de Taganga como destino sostenible, en especial siguiendo los requisitos de la norma técnica NTS-TS 001-1 del Viceministerio de Turismo de Colombia.

Effect of pegaptanib sodium 0.3 mg intravitreal injections (Macugen) in intraocular pressure

DEFF Research Database (Denmark)

Boyer, David S; Goldbaum, Mauro; Leys, Anita M

2014-01-01

OBJECTIVE: To assess the rate of pegaptanib-associated sustained intraocular pressure (IOP) elevation. METHODS: A posthoc analysis was conducted on all IOP measurements, except the immediate 30-min postinjection, from all subjects randomised to pegaptanib 0.3 mg or sham injections continuously in...

Efectividad de la lente intraocular ACRI. SMART 46-S en la cirugía de catarata por microincisiones Effectiveness of the intraocular lens ACRI SMART 46-S in micro-incision cataract surgery

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Juan Raúl Hernández Silva

2007-12-01

Full Text Available El perfeccionamiento y aplicación de una industria destinada a modernizar las lentes intraoculares y el instrumental quirúrgico ha impulsado un conjunto de adelantos que han permitido optimizar, corregir y refinar las técnicas quirúrgicas para la cirugía de la catarata y en especial la facoemulsificación. El punto más importante en esta cadena de adelantos está enmarcado y encaminado a disminuir el tamaño de la incisión quirúrgica que permita solucionar un número importante de complicaciones que con relativa frecuencia se presentan con la aplicación de las técnicas quirúrgicas convencionales extracapsular e intracapsular con incisiones mayores a los 10 mm. Actualmente se han desarrollado técnicas quirúrgicas conocidas como cirugía de la catarata por microincisiones .Se realizó un estudio descriptivo y retrospectivo, cuyo universo estuvo constituido por 27 pacientes (ojos con diagnóstico de catarata presenil y senil, que recibieron tratamiento quirúrgico con la técnica de facoemulsificación por microinsiciones e implante de lente intraocular de cámara posterior de una pieza, plegable de acrílico, de un tamaño de 11 x 6 mm de óptica, modelo Acri. Smart 46 S con inyector, en el Centro de Microcirugía Ocular del Instituto Cubano de Oftalmología “Ramón Pando Ferrer”, en el período comprendido desde enero 2004 hasta enero 2005. Se encontró que la mayoría de los casos tenían más de 50 años, se alcanzó una recuperación significativa de la mejor agudeza visual corregida en el posoperatorio, el astigmatismo inducido fue bajo. En cuanto a los parámetros facodinámicos utilizados, el poder de ultrasonido fue como promedio bajo. Las complicaciones presentadas fueron pocas, salida de vítreo secundaria a rotura de la cápsula posterior ocurrió más frecuentemente. Se concluye que la técnica quirúrgica MICS con implante de lente Acri.Smart 46 S constituye una opción válida, segura y eficaz en el tratamiento de la

Sutureless intrascleral intraocular lens fixation with lamellar dissection of scleral tunnel

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Kawaji T

2016-01-01

Full Text Available Takahiro Kawaji,1,2 Tomoki Sato,2 Hidenobu Tanihara11Department of Ophthalmology, Faculty of Life Sciences, Kumamoto University, Chuo-ku, 2Sato Eye & Internal Medicine Clinic, Kumamoto, JapanPurpose: To report the results of sutureless scleral fixation of a posterior chamber intraocular lens (IOL by using our developed simple technique.Methods: We retrospectively reviewed the medical records of 48 eyes of 47 patients who underwent sutureless intrascleral IOL fixation by using our modified technique. A 25-gauge microvitreoretinal knife was used to perform sclerotomies and create limbus-parallel scleral tunnels with lamellar dissection in which the haptics were fixed.Results: The IOLs were fixed and centered well. The mean follow-up period was 26.7 months. Postoperative complications included smooth vitreous hemorrhage in four eyes (8.3%, cystoid macular edema in two eyes (4.2%, and iris capture of the IOL in two eyes (4.2%. No other complications, such as breakage of the IOL, spontaneous IOL dislocation, or retinal detachment, were detected during the follow-up period.Conclusion: The lamellar dissection of the limbus-parallel scleral tunnel can simplify the forceps-assisted introduction of the haptics into the scleral tunnel, and this technique seemed to be safe.Keywords: intraocular lenses, ophthalmologic surgical procedures, intrascleral fixation, sutureless fixation

Opacification of hydrophilic intraocular lenses after Descemet stripping automated endothelial keratoplasty

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Morgan-Warren PJ

2015-02-01

Full Text Available Peter J Morgan-Warren, Walter Andreatta, Amit K Patel Department of Ophthalmology, Solihull Hospital, Heart of England NHS Foundation Trust, Birmingham, UK Purpose: Opacification of hydrophilic acrylic intraocular lenses (IOLs is an emerging complication following Descemet stripping automated endothelial keratoplasty (DSAEK. We report six cases and review the current literature.Methods: In this retrospective, noncomparative, observational case series, patients with IOL opacification after previous DSAEK surgery were identified from corneal clinic records. Case notes were reviewed for demographic details, indication for DSAEK, IOL model, incidence of rebubbling, and postoperative course.Results: Six patients developed IOL opacification after DSAEK. All patients had Fuchs’ endothelial dystrophy and had previously received hydrophilic acrylic IOL models. Central anterior IOL opacification was noted in all six cases. Five cases (83% had required rebubbling due to dislocated graft tissue, and one had an early postoperative intraocular pressure (IOP rise. Five cases (83% were managed conservatively, and one case with a failed graft underwent redo DSAEK and IOL exchange.Conclusion: Repeated exposure to intracameral air, raised IOP, and other patient influences may be major etiological factors for IOL opacification after DSAEK. We advise avoiding hydrophilic acrylic IOL models in patients who may require future endothelial keratoplasty. Keywords: IOL, DSAEK, lamellar keratoplasty, endothelial corneal transplantation

Prótese intra-ocular de resina acrílica em cães e gatos Acrylic resin intraocular prosthesis in dogs and cats

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S.C. Rahal

2000-08-01

Full Text Available Foram atendidos no Hospital Veterinário da Faculdade de Medicina Veterinária e Zootecnia da Unesp - Campus de Botucatu, 11 animais (oito cães e três gatos, com alterações oftálmicas unilaterais graves que levaram à perda total da função ocular (protrusão de globo com injúria nervosa e estrutural, perfurações de córnea com perda de conteúdo intra-ocular e endoftalmites, entre outras. Os animais, com idades entre dois meses e 10 anos, foram submetidos à evisceração e posterior inclusão de esfera de resina acrílica (metilmetacrilato na capa córneo-escleral ou escleral. As esferas foram previamente confeccionadas e esterilizadas por autoclavagem. No pós-operatório foram utilizados antiinflamatórios e antibioticoterapia tópica combinada ou não a sistêmica. O período de observação variou de 2 meses a 3 anos e os aspectos avaliados foram secreção ocular, blefarospasmo, sinais de desconforto e estética. Obtiveram-se resultados satisfatórios em oito casos. Concluiu-se que a resina acrílica pode ser uma alternativa para uso como inclusão em cavidade anoftálmica.Eleven animals (eight dogs and three cats, aged between two months and ten years were referred to the Veterinary Hospital of Faculty of Veterinary Medicine and Animal Science - Unesp, Botucatu, Brazil. These animals presented severe unilateral ophthalmic changes that lead to a total loss of ocular function, such as prolapsed eyes with nervous and structural injury, corneal damage with loss of intraocular contents or endophthalmitis among others. They were submitted to evisceration followed by the insertion of an acrylic resin prosthesis (methylmethacrylate in the corneoscleral or scleral shell. The spheres were previously made and sterilized by autoclave. The postoperative medical therapy included topical and systemic broad-spectrum antibiotics for seven days and anti-inflammatory drugs. The follow-up time varied from two months to three years. The evaluated

Reverse pupillary block associated with pigment dispersion syndrome after in-the-bag intraocular lens implantation.

Science.gov (United States)

Itagaki, Hideo; Kunikata, Toshio; Hiratsuka, Kentaro; Saito, Junichiro; Oshika, Tetsuro

2013-12-01

A 61-year-old man with high myopia who had received a systemic α1A-adrenoceptor antagonist had phacoemulsification and in-the-bag intraocular lens implantation in the right eye. One day postoperatively, marked pigment dispersion in the anterior chamber, posterior bowing of the iris, and iridodonesis were noted associated with a subsequent elevation in intraocular pressure (IOP). Pharmacological pupil dilation was effective in reducing pigment dispersion and IOP, and laser peripheral iridotomy was performed to alleviate posterior bowing of the iris. We hypothesize that dynamic changes in the aqueous humor flow by cataract surgery and latent flaccidity of the iris due to the systemic α1A-adrenoceptor antagonist caused reverse pupillary block. High myopia may be another risk factor for this complication. Copyright © 2013 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved.

DESEMPENHO IMPORTADOR DO SEGMENTO DE MODA PRAIA BRASILEIRO: UMA PROPOSTA DE ANÁLISE

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Ana Elizabeth Moiseichyk

2012-07-01

Full Text Available O vasto litoral brasileiro aliado a uma cultura de seu uso como meio de lazer propiciou ao país o surgimento de inúmeras empresas especializadas na produção e comercialização da moda praia. No entanto, existe um grupo de clientes que buscam produtos importados, mesmo neste segmento. Neste sentido, este estudo teve como objetivo caracterizar a importação brasileira de moda praia feminina, investigando qual é sua importância e participação no contexto internacional, pelos desafios propostos pela competição entre os diversos players e a necessidade de conhecimentos sobre inovação para se manter no mercado importador. Apoiado na análise de conteúdo da documentação temática com dados quantitativos e oficiais coletados no portal Aliceweb do Ministério do Desenvolvimento, Indústria e Comércio Exterior do Brasil obteve-se como resultado final do estudo a estruturação de uma tabela com os 10 principais países fornecedores e o comportamento de compra, onde, em 2011, o principal expoente foi a China com 90,9% da quantidade importada com 959.324 peças compradas, valor médio US$ 2,17 FOB, desempenho de compra em crescimento e tendência de preço em queda.

Implante de lente intraocular trifocal difractivo: análisis y resultado de la agudeza visual

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Miguel Ángel Ibáñez-Hernández

2017-09-01

Conclusiones: El implante de un lente intraocular trifocal difractivo es capaz de proporcionar una excelente visión lejana, intermedia y cercana, con escasas aberraciones ópticas, permitiendo una mejor calidad visual útil en actividades desarrolladas a diferentes distancias.

Facoemulsificação, vitrectomia via pars plana e implante de lente intra-ocular em olhos com retinopatia diabética proliferativa Phacoemulsification, pars plana vitrectomy and intraocular lens implant in eyes with proliferative diabetic retinopathy

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Armando Belfort Mattos

2004-06-01

Full Text Available OBJETIVO: Avaliar a viabilidade da técnica de facoemulsificação para a extração da catarata com implante de lente intra-ocular combinada à vitrectomia via pars plana em olhos com retinopatia diabética proliferativa, em um único procedimento cirúrgico. MÉTODOS: Foram revisados os prontuários de 47 pacientes (53 olhos com retinopatia diabética proliferativa e catarata que foram submetidos ao procedimento combinado de vitrectomia via pars plana, facoemulsificação e implante de lente intra-ocular no mesmo ato cirúrgico, entre janeiro de 1991 e setembro de 1998 no Bascom Palmer Eye Institute, hospital de olhos filiado à Universidade de Miami. O estudo foi realizado em conjunto com a Universidade Federal de São Paulo. Participaram do estudo 43 olhos de 40 pacientes. RESULTADOS: O tempo de seguimento variou de três a 60 meses com média de 20 meses. A idade dos pacientes variou de 37 a 77 anos com média de 59 anos. A acuidade visual melhorou duas linhas ou mais em relação ao pré-operatório em 26 (60,4% olhos, permaneceu a mesma em 9 (20,9% e piorou em 8 (18,6%. Em (23,2% 10 olhos a acuidade visual aumentou para 20/40. O teste estatístico chamado de "teste do sinal" mostrou-se estatisticamente significante na melhora da acuidade visual final. A complicação mais observada foi a hemorragia vítrea recorrente, ocorrendo em 12 (27,9% olhos, seguida pela inflamação transitória da câmara anterior em 9 olhos (20,9%. Complicações intra-operatórias relacionadas à extração do cristalino foram raras. No pós-operatório observaram-se captura da lente intra-ocular em 2 (4,6 % olhos e lente intra-ocular subluxada em 1 (2,3% olho. CONCLUSÕES: A cirurgia combinada de facoemulsificação, implante de lente intra-ocular e vitrectomia via pars plana em olhos com retinopatia diabética é procedimento bem tolerado e geralmente apresenta bons resultados com relação à acuidade visual. Um único procedimento para remover a catarata e

Clinical observation of Artisan iris-clip intraocular lens implantation at stage Ⅰ

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Qing Zhou

2014-09-01

Full Text Available AIM: To observe the clinical efficacy of Artisan iris-clip intraocular lens(IOLimplantation on cataract with a wide range of lens dislocation.METHODS: Twenty-four hospital patients(28 eyesof cataract with lens subluxation by trauma(20 patients, 20 eyesand Marfan's syndrome(4 patients, 8 eyesduring May 2007 to December 2011 were selected. All of them underwent phacoemulsification or an anterior vitrectomy and Artisan iris-clip IOL implantation at stage Ⅰ. Postoperative visual acuity, corneal endothelial cell count, intraocular lens position and postoperative complications were observed. Follow-up time was 6mo.RESULTS:Compared with the preoperative, postoperative best corrected visual acuity improved to varying degrees, visual acuity of 0.1-0.5 was in 20 eyes, 0.5-1.0 in 8 eyes. After followed up 1-6mo, no artificial lens shift, iris inflammation, iris atrophy and corneal decompensation and other complications were observed.CONCLUSION: Cataract surgery with a wide range of lens dislocation is difficult, but as long as surgeons who have a wealth of clinical experience and superb skills, still can carry out phacoemulsification surgery or anterior vitrectomy and Artisan iris-clip IOL implantation and obtain a better outcome.

Effect of gamma radiation on the optical properties of intraocular lenses

International Nuclear Information System (INIS)

Naguib, N.I.

2006-01-01

The effect of gamma rays in the range of doses up to 150 gray on optical and thermal properties of the intraocular lenses (IOL) made of polymethyl methacrylate (PMMA) was studied. Thermogravimetric analysis (TGA) and differential scanning colorimetry (DSC) have been performed to study the effect of gamma irradiation on the IOL. The results indicate that irradiation up to 150 Gy did not affect greatly the optical and thermal properties of the investigated IOL

Spiral CT versus conventional CT in the preoperative assessment of metallic intraocular foreign bodies

International Nuclear Information System (INIS)

Prokesch, R.; Bankier, A.; Ba-Ssalamah, A.; Imhof, H.; Lakits, A.; Scholda, C.

1998-01-01

Purpose: To compare the effectiveness of spiral CT versus conventional CT in the preoperative assessment of metallic intraocular foreign bodies. Results: All foreign bodies were detected by each scanning modality on the axial and on the reconstructed planes. The quality of the axial images was similar for spiral and conventional CT. The spiral technique provided high-quality reconstructed images which allowed accurate localization of the foreign bodies in all cases. Reconstructions by conventional technique were inadequate for preoperative assessment. The examination time for the total orbital volume was 18 s for spiral CT and 52 s for conventional CT. Radiation dose delivered to the lens was 35 mGy for spiral CT and 56 mGy for conventional CT axial scanning. Conclusion: Spiral CT multiplanar offers several significant advantages for the preoperative assessment of metallic intraocular foreign bodies compared to the conventional CT technique in clinical practice, including short examination time, minimized motion artifacts, reduced radiation exposure, and accurate localization. (orig.) [de

Análise de rentabilidade dos segmentos de mercado de empresa distribuidora de mercadorias

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Rodney Wernke

2004-08-01

Full Text Available O artigo apresenta possíveis aplicações do conceito de margem de contribuição para avaliação de desempenho de segmentos comerciais, voltando-se mais especificamente para empresas que operam no ramo de distribuição de mercadorias. São comentadas e exemplificadas situações em que a margem de contribuição pode servir como ferramenta de apoio aos gestores da área de vendas para averiguar a rentabilidade de produtos, linhas de mercadorias, territórios de venda, canais de distribuição, clientes e vendedores. Por último enfatiza-se o aspecto da projeção de resultados operacionais com base na contribuição total e seus benefícios.The article presents possible applications of the contribution margin concept for the performance evaluation of commercial segments, more specifically oriented towards goods distribution companies. We comment on and give examples of situations in which the contribution margin can serve as a tool to support managers from the sales area to verify the profitability of products, product lines, sales regions, distribution channels, clients and salespersons. Finally, we emphasize the aspect of operational result projection on the basis of the total contribution and its benefits.

Inflammatory and intraocular pressure outcomes after trabeculectomy in active uveitic glaucoma in Chinese

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Doris W.F. Yick

2015-06-01

Full Text Available AIM: To analyze the outcomes in uveitic activity and intraocular pressure(IOPcontrol after trabeculectomy for uveitis with uncontrolled IOP. METHODS: The medical records of consecutive uveitic glaucoma patients undergoing trabeculectomy between October 2006 to March 2011 were retrospectively reviewed. Uveitic activity, frequency of recurrence, steroid dependence, and intraocular pressure control were compared with paired t-test before and after trabeculectomy. RESULTS: In 29 eyes from 29 patients, 90% of eyes were on topical steroids at the time of trabeculectomy. The mean age was 58.3±14.0 years old with a pre-operative IOP of 35.7±8.9mmHg. The mean follow up time was 35.2±18.7mo. There was a reduction of anterior chamber activity grading of 0.4±0.6(PPCONCLUSION: Uveitic activity and IOP control improved after trabeculectomy with a lower success rate to primary glaucomas. Trabeculectomy may be considered as a possible early intervention of active uveitis with high IOP for pressure and uveitic activity control.

Effect of transscleral neodymium: YAG cyclophotocoagulation on intraocular lenses

Energy Technology Data Exchange (ETDEWEB)

Blomquist, P.H.; Gross, R.L.; Koch, D.D. (Baylor College of Medicine, Houston, TX (USA))

1990-03-01

A neodymium: YAG laser operating in the thermal mode was used to irradiate isolated intraocular lenses (IOLs) and to perform transscleral cyclophotocoagulation on pseudophakic autopsy eyes to investigate the potential damage to IOL haptics such irradiation may cause. In the isolated IOLs, 70 mJ of energy deformed and partially melted both polymethylmethacrylate (PMMA) and polypropylene haptics. One of the capsular-fixated PC-IOL haptics in an autopsy eye partially melted when irradiated with the maximum energy level (8.8 J), with the aiming beam focused 1 mm posterior to the limbus and maximal posterior focus offset.

Early aggressive intraocular pressure lowering, target intraocular pressure, and a novel concept for glaucoma care.

Science.gov (United States)

Singh, Kuldev; Shrivastava, Anurag

2008-11-01

Early diagnosis of glaucomatous optic nerve damage offers the potential for early treatment which may prevent vision loss from this neurodegenerative disease. Even in patients who do not begin early treatment, early diagnosis allows for better monitoring of disease at a stage where the stakes are lower relative to later stages of the disease. For these reasons, early diagnosis of glaucomatous optic nerve disease is desirable and opens the door for appropriately aggressive therapy. The target intraocular pressure (IOP) concept is widely employed by glaucoma practitioners. Although there have been no randomized clinical trials or other high-quality studies showing the benefits of setting a target IOP versus not using this approach, there is ample evidence that lowering IOP slows glaucoma progression and, in general, lower is better, regardless of disease stage and baseline IOP level. We propose an alternative approach to managing glaucoma without the use of the target IOP concept and suggest that this market IOP concept should be compared with the target IOP approach in an appropriately powered comparative clinical trial.

65. Tratamiento con células madre de médula ósea en cardiopatía isquémica fibrótica

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J.C. Trainini

2010-01-01

Conclusiones: Estos resultados demuestran la factibilidad del tratamiento. La recuperación de segmentos no viables sugiere la eficacia funcional durante el seguimiento. Estos resultados deben someterse a estudios rigurosos y controlados para su evaluación final.

Comparison between OPD-Scan results and visual outcomes of monofocal and multifocal intraocular lenses Comparação dos resultados do OPD-Scan e performance visual das lentes intraoculares monofocal e multifocal

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Wilson Takashi Hida

2009-08-01

Full Text Available PURPOSE: To compare the visual outcome, contrast sensitivity and wavefront analysis of patients that underwent cataract surgery and implantation of AcrySof SN60D3 multifocal intraocular lens with those who received the AcrySof SN60AT monofocal IOL. METHODS: This was a prospective clinical trial of forty eyes that received the multifocal IOL and thirty-two eyes that received the monofocal IOL after phacoemulsification. RESULTS: Values for total and spherical aberrations in the multifocal group were statistically lower than in the monofocal group. In the monofocal group, 75% achieved uncorrected intermediate visual acuities between Jaeger 1 and 6. In the multifocal group, 75% of the eyes achieved more than Jaeger 6. At least 87.5% of the multifocal group and 6.3% of the monofocal group achieved monocular uncorrected near acuity of 20/30 (J2, N5 or better. And 90.0% of the eyes in the multifocal group and 37.5% in the monofocal group achieved an uncorrected near acuity of 20/40 (J3, N6 or better. The mean spherical error was 0.11 D in the multifocal group and -0.18 D in the monofocal group (p=0.0379. The SN60D3 group compared to SN60AT group had low contrast sensitivity (log units with statistically significant differences in 6.0 cpd in photopic conditions (p=0.014 and the SN60D3 group compared to SN60AT group had higher contrast sensitivity (log units under mesopic conditions (p=0.044. CONCLUSION: The multifocal IOLs induced less spherical aberration than monofocal IOLs and predictably good uncorrected distance and uncorrected near acuities. However, contrast sensitivity was lower in the multifocal group.OBJETIVO: Comparar a performance visual, sensibilidade ao contraste e de wavefront com OPD-Scan em pacientes submetidos a cirurgia de facoemulsificação com implante de lente intraocular AcrySof SN60D3 multifocal e AcrySof SA60AT monofocal. MÉTODOS: Quarenta olhos com a lente intraocular multifocal e trinta e dois olhos com a lente intraocular

Aproximación a la diferenciación de especies del subgénero Helcocyrtomyia (Diptera:Psychodidae, mediante morfometría tradicional y secuenciamiento de DNA mitocondrial

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N. Jaramillo

2000-02-01

Full Text Available

Usualmente la genitalia de los machos se ha utilizado para definir las diferencias interespecies dentro del subgénero Helcocyrtomyia, ya que las hembras presentan gran similitud en las formas de sus genitalias, y por tanto la diferenciación morfológica de ellas se realiza por asociación geográfica con el macho y por algunos caracteres adicionales como el grado de pigmentación del mesonoto, la longitud de los palpos y la fórmula palpal, entre otros. Los estudios de confirmación taxonómica y biología evolutiva han implementado el uso de secuenciamiento de ADNmt y morfometría como técnicas asociadas a la taxonomía tradicional. El secuenciamiento de genes mitocondriales ha mostrado separaciones exitosas entre especies cercanas, por análisis estadístico de los cambios nucleotídicos (transiciones, transversiones, deleciones, etc. estimando las relaciones filogenéticas entre ellas. De manera similar las técnicas morfométricas han logrado discriminar especies de insectos, por el análisis de caracteres poligénicos que varían en tamaño y forma. Estos caracteres permiten estimar diferencias interespecíficas atribuibles principalmente a efectos ambientales y genéticos respectivamente.

Mediante el uso de morfometría, separando el componente genético del ambiental, y del secuenciamiento de un segmento del gen mitocondrial ND4, esta propuesta tiene por objetivo contribuir a la definición de las especies del subgénero Helcocyrtomyia utilizando machos y hembras.

La morfometría se basará en las mediciones de caracteres de las alas y genitalias. Para el análisis de las variables morfométricas se empleará Análisis Multigrupo de Componentes Principales, Análisis de Componentes Principales Comunes y Análisis de

Black diaphragm intraocular lens implantation and penetrating keratoplasty in aphakic eyes with traumatic aniridia

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Xiao-Guang Dong

2013-04-01

Full Text Available AIM: To evaluate the long-term outcome of implantation of black diaphragm intraocular (BDI lens combined with penetrating keratoplasty (PKP for managing aphakic eyes with traumatic aniridia and corneal damage. METHODS: Six aphakic eyes of six patients with traumatic aniridia and corneal damage had BDI lens implantation at Qingdao Eye Hospital, Shandong Eye Institute from June 2008 to November 2011. Medical records of the patients were reviewed. Three patients received PKP and after 12-18months were implanted with BDI lens. The other three patients completed PKP and BDI lens implantation at the same time. The corrected visual acuity, intraocular pressure and number of corneal endothelial cells were monitored. RESULTS: The patients were followed up for an average of 24.3±12.1months (range 14-48 months. All BDI lenses were located well. The best corrected visual acuity got improved in 5 patients (0.1-1.0 and decreased in 1 patient from 0.4 to 0.2. Three patients had normal intraocular pressure (IOP after implantation. Two patients required antiglaucoma medications to control IOP within the normal range and 1 patient implanted Ahmed glaucoma valve to control IOP. The corneal grafts kept transparent in all eyes and the corneal endothelial counting >1 000/mm2, although two patients experienced acute graft rejection and loss more than 30% corneal endothelial cells. CONCLUSION: Implantation of BDI lens combined with PKP is an effective option for managing aphakic eyes with traumatic aniridia and corneal damage. Although the results in our study are encouraging, additional studies of the long-term safety and efficacy are required. A larger study population and longer follow-up may be beneficial.

Caracterización de los hábitos de compra y consumo de vino en la ciudad de Chillán, Chile

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Nataly Guiñez Cabrera

2016-12-01

Full Text Available Continuamente la industria vitivinícola se preocupa de la alta competitividad del sector, creando productos más sofisticados y de mayor calidad. Sin embargo, dejan de lado un punto relevante que es la división o segmentación del mercado, generando estrategias comerciales generalizadas y no desarrollando productos y estrategias de marketing específicas diferenciadoras para mercados con características distintas. La industria de los vinos debe estudiar más en profundidad cuáles son las necesidades y deseos de cada uno de los segmentos de consumidores, para otorgar una mezcla comercial especializada y direccionada a cada segmento. Éste es un estudio exploratorio que muestra las diferencias en las preferencias de consumo y en el comportamiento de compra que presentaron los grupos etarios de una muestra de 488 consumidores de vino de la ciudad de Chillán, Chile. Los resultados indicaron que existen diferencias en las preferencias y en el comportamiento de compra de bebidas alcohólicas, según la edad del consumidor. También existe una correlación positiva entre la razón de consumo “me gusta el vino por su sabor y olor” y las ocasiones preferentes de consumo de vino cotidiana (almuerzo o cena, formal (almuerzo o cena, barbacoas, reuniones familiares y en restaurantes. Esto muestra la importancia de que el sector vitivinícola desarrolle estrategias de comercialización para cada uno de estos segmentos y también priorice que el sabor y olor del producto es fundamental en este mercado.

Research on antibodies anti toxoplasma gondii in intraocular fluids (Aqueous and vitreous humor) from patients with ocular toxoplasmosis, in the City of Belém, Pará State

OpenAIRE

Carmo, Ediclei Lima do; Almeida, Edmundo Frota; Bichara, Cléa Nazaré; Póvoa, Marinete Marins

2005-01-01

Foi realizada pesquisa de anticorpos IgG, IgM e IgA anti-Toxoplasma gondii no soro e fluidos intra-oculares (humor aquoso e vítreo) de pacientes com toxoplasmose ocular. A partir dos resultados obtidos verificou-se que anticorpos IgG e IgA intraocular anti-Toxoplasma gondii podem vir a ser importantes marcadores no diagnóstico de toxoplasmose ocular.Tests were performed for antibodies IgG, IgM and IgA anti-Toxoplasma gondii antibodies in serum and intraocular fluids (Aqueous and vitreous humo...

Identificación de los estilos de vida alimenticios en España

DEFF Research Database (Denmark)

Bredahl, Lone; Grunert, Klaus G.

1997-01-01

Este artículo presenta un instrumento teórico para analizar los estilos de vida alimenticios de los consumidores. El estilo de vida alimenticio es percibido como un esquema mental que enmarca el comportamiento del consumidor, pero que no es idénti las acciones de compartamiento indivual. Se...... presenta la aplicatión de este instrumento por primera vez a una muestra representativa de consumidores españoles (n=1000). En base a los datos de las encuestas, se determinan las características general los consumidores y se identifican diferentes segmentos en base al estilo de vida alimenticio......, utilizando un análisis cluster jerárquico. Los segmentos de consumidores obtenidos son: aventureros, conservadores, pasotas, racionales y entusiastas. Es segmentos y las características generales de los consumidores españoles son comparados y descritos....

Visual acuity after trans-scleral sutured posterior chamber intraocular lens

International Nuclear Information System (INIS)

Mahmood, S.A.; Zafar, S.

2014-01-01

To determine the changes in visual acuity in patients undergoing Trans-Scleral Sutured Posterior Chamber Intra-Ocular Lens (TSSPCIOL) implantation at a tertiary care hospital in Karachi, Pakistan. Study Design: Case series. Place and Duration of Study: LRBT Tertiary Eye Hospital, Karachi, from January 2006 to December 2010. Methodology: Records of all patients undergoing implantation of TSSPCIOL were reviewed. Patients with diagnosed glaucoma, diabetic retinopathy, macular degeneration, history of recurrent uveitis, corneal haze or central corneal scars were excluded. For the final analysis, 70 eyes out of a total of 75 were selected. Main outcomes of interest were pre and postoperative visual acuities and surgical complications. SPSS 21 was used for data analysis. Results: Pre-operatively, the average Best Spectacle-Corrected Visual Acuity (BSCVA) was 6/36 on the Snellen chart. This improved to 6/12 postoperatively. The mean improvement seen was 2.4 lines on the Snellen chart (p < 0.05). Complications include transient intraocular pressure elevation in 25 eyes (36%), IOL tilt in 4 eyes (7.1%), Cystoid Macular Edema (CME) in 4 eyes (5.7%), vitreous haemorrhage in 2 eyes (2.9%), hyphema in 2 eyes (2.9%), uveitis in 1 eye (1.4%), and retinal detachment 1 eye (1.4%). No IOL subluxation, suture erosion, iris capture, choroidal effusion or endophthalmitis was encountered and no re-operations were needed. Conclusion: TSSPCIOLs are a good management option for patients with aphakia in whom PC IOLs cannot be placed. (author)

Associação entre dois diferentes tipos de estrangulamento com a variação da pressão intraocular em atletas de jiu-jitsu

OpenAIRE

Scarpi,Marinho Jorge; Conte,Marcelo; Rossin,Reginaldo Alexandre; Skubs,Renato; Lenk,Rudolf Eberhard; Brant,Rodrigo

2009-01-01

OBJETIVO: Verificar a associação entre dois diferentes tipos de estrangulamento com a variação da pressão intraocular em atletas de jiu-jitsu. MÉTODO: Estudo observacional em grupo de 9 atletas de jiu-jitsu, com mínimo 6 meses de treinamento, sexo masculino, idades entre 20 e 30 anos, sem presença de lesões físicas e do bulbo ocular. Buscou-se associação entre a variação da pressão intraocular e os estrangulamentos Frontal da Guarda (E1) e Frontal da Montada (E2). A pressão intraocular foi de...

Follow up of intraocular lens subluxation with a combined topographer/aberrometer

OpenAIRE

Georgios A. Kontadakis; George D. Kymionis; Vardhaman P. Kankariya; Ioannis G. Pallikaris

2012-01-01

Purpose: To report a 36-year-old patient with intraocular lens (IOL) subluxation that was followed for IOL stability with evaluation of images captured with the iTrace combined aberrometer/topographer. Methods: The patient had undergone phacoemulsification with IOL implantation for congenital cataract 15 years before. He presented with bilateral IOL subluxation, more severe in his right eye. Right eye was operated for IOL exchange and left eye was followed with the iTrace images. The image...

Argumentos para la elección del centro educativo: un estudio de caso con padres portugueses [SPA

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Virgínio Sá

2013-01-01

Full Text Available Tomando como base empírica algunos de los datos del cuestionario aplicado a una muestra de cerca de ochocientos padres seleccionados en tres centros públicos de enseñanza secundaria, en este artículo analizamos el modo cómo diferentes categorías de padres organizan "jerarquías de excelencia", a través de los "argumentos de elección" a los que dan prioridad cuando escogen el centro educativo, al pasar a la enseñanza secundaria en 10º curso (4º de la ESO. Del análisis de los datos destaca que, en todos los segmentos de padres, encontramos una fracción que concede gran importancia a los indicadores de naturaleza académica; verificamos, además, una concentración desigual de estas fracciones en los tres establecimientos estudiados, lo que refleja un predominio de diferentes tipos de público en cada escuela. De este modo, aunque varíe la importancia atribuida a los "argumentos de elección", según el nivel de estudios de los padres, en los casos estudiados las "jerarquías de excelencia" se distinguen, sobre todo, de acuerdo con la variable centro.

Percepeções e anseios dos atores envolvidos no segmento de turismo rural: um estudo de caso no município de Foz do Iguaçu/PR

OpenAIRE

Sodré, Samantha Trentin

2015-01-01

Trabalho de Conclusão de Curso apresentado ao Instituto Latino-Americano de Economia, Sociedade e Política da Universidade Federal da Integração Latino-Americana, como requisito parcial à obtenção do título de Bacharel em Desenvolvimento Rural e Segurança Alimentar. Orientadora: Prof. Dra. Ana Alice Aguiar Eleuterio O segmento do turismo rural é desenvolvido em áreas rurais produtivas, nas quais o turista tem a possibilidade de participa...

Evaluation of the diurnal intraocular pressure fluctuations and blood pressure under dehydration due to fasting

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Gonen Baser

2016-12-01

Full Text Available Introduction: This study aimed to investigate the diurnal intraocular pressure fluctuations under dehydration conditions and the relationship between the intraocular pressure fluctuations and blood pressure. Methods: The intraocular pressures (IOP, body weights, as well as systolic and diastolic blood pressures (SBP, DBP of 36 fasting healthy volunteers were recorded at 8:00 a.m. and 5:00 p.m. in the Ramadan of 2014 and two weeks after it. The data were analyzed using paired Student’s t-test and Pearson correlation analysis. Results: As the results demonstrated, the mean diurnal IOP differences of IOP, SBP, DBP, and weight were 2.67±1.33 mmHg, 9.44±8.02 mmHg, 3.33±5.94 mmHg, and 0.90±0.46 kg during the fasting period, respectively. In addition, the mean diurnal IOP differences of IOP, SBP, DBP, and weight were -0.33±1.4 mmHg (P=0.001, 0.55±7.25mmHg (P=0.003, -3.33±5.94 mmHg (P=0.001, and 0.12±0.45 kg (P=0.001 during the control period, respectively. There was a moderate correlation between the diurnal IOP and SBP differences (r=0.517, P=0.028. Conclusion: Based on the findings of the current study, the total fluid volume might have a more dominant effect on IOP peaks than the sympathetic system activity. Furthermore, the SBP was found to correlate with the IOP.

Carbachol as miotic agent in intra-ocular lens implant surgery

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Agarwal Jitendra

1988-01-01

Full Text Available The intra cameral use of 0.025% carbachol as a miotic agent in anterior chamber intraocular lens im-plant surgery us reported in 15 cases. Carbachol produced prompt and effective moisis and was found to be harmless and non-irritating to the anterior chamber structures. A rebound dialatation of the pipit was noticed in the post operative period in 3 of our first 5 cases where only carbachol was used. For prolonged miosis instillation of a more powerful miotic like pilocarpine is recommended at the completion of surgery:

Calidad de la atención al adulto mayor en el consultorio del Médico de la Familia

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Maria Esther Alvarez Lauzarique

Full Text Available servicios y la satisfacción de la población y sus prestadores. Cuba posee el 18,3 % de su población con 60 años y más, y tendencia al aumento en los años futuros. De ahí que se vaticine un incremento en los servicios de salud, situación que afecta su calidad, por lo que evaluar la atención que se presta en el nivel primario constituye una necesidad. Objetivo: evaluar la calidad del proceso de atención que se brinda a los ancianos en consultorios del médico de la familia. Métodos: investigación evaluativa, descriptiva y transversal en el municipio 10 de Octubre. Como fuente de información se empleó la historia clínica de los 100 pacientes seleccionadas en 10 consultorios de los policlínicos Luis Pasteur y Luis de la Puente Uceda, cuya información se obtuvo mediante un formulario validado. Resultados : el 31,2 % de las variables fueron evaluadas en la categoría de bueno, las restantes no alcanzaron el estándar. Conclusiones: la calidad del proceso de atención en el consultorio mostró insuficiencias de acuerdo con los estándares establecidos, lo que debe tenerse en cuenta para la mejora continua de la atención a este segmento de la población.

Effect of Anterior Chamber Depth on Intraocular Pressure after Uneventful Phacoemulsification Surgery in Nonglaucomatous Eyes with CataractEffect of Anterior Chamber Depth on Intraocular Pressure after Uneventful Phacoemulsification Surgery in Nonglaucomatous Eyes with CataractEffect of Anterior Chamber Depth on Intraocular Pressure after Uneventful Phacoemulsification Surgery in Nonglaucomatous Eyes with Cataract

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Tansu Gönen

2011-08-01

Full Text Available Purpose: To evaluate the effect of preoperative anterior chamber depth (ACD on intraocular pressure (IOP after uneventful phacoemulsification and intraocular lens (IOL implantation in nonglaucomatous eyes. Material and Method: The medical records of fifty-five patients (30 male and 25 female were reviewed retrospectively. The patients who had undergone uneventful phacoemulsification and IOL implantation were divided into two groups according to the values of preoperative ACD: 30 eyes in group 1 (ACD≤3.27 mm and 25 eyes in group 2 (ACD>3.27 mm. IOP was measured using non-contact tonometer preoperatively and postoperatively (1 day, 1 week, 1 month, and 3 months. Results: Three months after phacoemulsification and IOL implantation, the mean IOP decreased 23.6% in group 1 and 13.7% in group 2. There was a statistically significant difference between the groups (p= 0.025. Discussion: The mean IOP decreases in eyes with shallow anterior chamber more than in normal eyes after uncomplicated phacoemulsification and IOL implantation. (Turk J Ophthalmol 2011; 41: 207-12

La Pubblica Amministrazione in uno scenario che cambia

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Renzo Carlucci

2009-03-01

Full Text Available Questo numero, mirato alle implicazioni dell'utilizzo del dato territoriale nel contesto delle PA, le Pubbliche Amministrazioni, si arricchisce di un contenuto ulteriore, particolarmente spaziale; GEOmedia esce infatti in coincidenza con una manifestazione che possiamo considerare la vetrina mediterranea privilegiata per la promozione culturale, scientifica e commerciale delle istituzioni e del segmento dell’industria aerospaziale europea ed italiana.

Combining zonal refractive and diffractive aspheric multifocal intraocular lenses.

Science.gov (United States)

Muñoz, Gonzalo; Albarrán-Diego, César; Javaloy, Jaime; Sakla, Hani F; Cerviño, Alejandro

2012-03-01

To assess visual performance with the combination of a zonal refractive aspheric multifocal intraocular lens (MIOL) (Lentis Mplus, Oculentis GmbH) and a diffractive aspheric MIOL (Acri.Lisa 366, Acri.Tech GmbH). This prospective interventional cohort study comprised 80 eyes from 40 cataract patients (mean age: 65.5±7.3 years) who underwent implantation of the Lentis Mplus MIOL in one eye and Acri.Lisa 366 MIOL in the fellow eye. The main outcome measures were refraction; monocular and binocular uncorrected and corrected distance, intermediate, and near visual acuities; monocular and binocular defocus curves; binocular photopic contrast sensitivity function compared to a monofocal intraocular lens (IOL) control group (40 age-matched pseudophakic patients implanted with the AR-40e [Abbott Medical Optics]); and quality of vision questionnaire. Binocular uncorrected visual acuities were 0.12 logMAR (0.76 decimal) or better at all distances measured between 6 m and 33 cm. The Lentis Mplus provided statistically significant better vision than the Acri.Lisa at distances between 2 m and 40 cm, and the Acri.Lisa provided statistically significant better vision than the Lentis Mplus at 33 cm. Binocular defocus curve showed little drop-off at intermediate distances. Photopic contrast sensitivity function for distance and near were similar to the monofocal IOL control group except for higher frequencies. Moderate glare (15%), night vision problems (12.5%), and halos (10%) were reported. Complete independence of spectacles was achieved by 92.5% of patients. The combination of zonal refractive aspheric and diffractive aspheric MIOLs resulted in excellent uncorrected binocular distance, intermediate, and near vision, with low incidence of significant photic phenomena and high patient satisfaction. Copyright 2012, SLACK Incorporated.

THE ROCK PROCESSING SECTOR: PART I: CUTTING TECHNOLOGY TOOLS, A NEW DIAMOND SEGMENT BAND SAW PART II: STUDY OF CUTTING FORCES

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ABRAHAM SEGADE ROBLEDA

2010-01-01

Full Text Available El artículo presenta el estado del arte de los procedimientos de corte empleados en la transformación de roca ornamental, principalmente, disco con segmentos de diamante, hilo diamantado y los telares. En todos ellos, una reducción en el espesor de corte, repercute de forma directa en la rentabilidad. Se presenta una herramienta novedosa, con un espesor de corte la mitad del mejor conseguido en herramientas convencionales: una sierra de cinta sobre la que se sueldan segmentos de diamante. Se construyen los primeros prototipos, se realizan pruebas de corte y se estudian las características del corte realizado. En una segunda parte se revisan los estudios que existen en la actualidad sobre la medición de fuerzas de corte en granito con herramientas convencionales, y se monitoriza una máquina prototipo de sierra de cinta. Se estudian las fuerzas de corte para este nuevo proceso de corte, se mide la fuerza tangencial, y la fuerza de avance, bajo diferentes condiciones de trabajo.

Efficacy on chopping with lens loop-pad in the small incision extracapsular cataract surgery with intraocular lens implantation

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Xiao-Ning Peng

2014-04-01

Full Text Available AIM: To study the clinical effects of chopping with lens loop-pad in the small incision extracapsular cataract surgery with intraocular lens implantation.METHODS:A total of 75 cases(80 eyes, in which loop-pad and chop knife were performed to chop nucleus before implanting intraocular lens. Visual acuity, postoperative astigmatism degree, intraoperative and postoperative complications were observed. The post-operative follow-up periods ranged from 3 to 12mo.RESULTS: The visual acuity was 0.3-0.5 in 37 eyes and 0.6 or better in 21 eyes at 1d, while was respectively in 43 eyes and in 26 eyes at 1mo. Compared with preoperative astigmatism(0.85±0.29D, there were significant difference at postoperative 1wk(1.75±0.55D(PP>0.05. Intraoperative posterior capsule rupture occurred in 4 eyes, which implantation was successful in 1 eye and 3 eyes was managed viaciliary sulcus. Two eyes had dermatoglyphic pattern edema in corneal endothelium which recovered after about 3d. Two eyes had local patchy opacities which recovered in 2wk. Two eyes had transient high intraocular pressure.CONCLUSION: The surgery is efficient, low cost, easy process and less complications, it is worth to be popularized.

Chiron Vision files FDA application to market intraocular implant for CMV retinitis. Food and Drug Administration.

Science.gov (United States)

1995-07-01

Chiron Corporation and Hoffman-LaRoche announced a filing of a New Drug Application with the Food and Drug Administration (FDA) to market Vitrasert, its intraocular implant which delivers ganciclovir directly to the eye for treatment of CMV retinitis. Clinical trials show that Vitrasert offers a clinical improvement versus intravenous ganciclovir in further delaying progression of CMV retinitis in the treated eye. One study reported that the median time to progression of CMV retinitis was 186 days for eyes receiving Vitrasert compared to 72 days for eyes receiving intravenous ganciclovir therapy. Chiron's intraocular implant contains ganciclovir embedded in a polymer-based system that slowly releases the drug into the eye for up to eight months. Two additional trials are underway. For further information contact the Professional Services Group at Chiron Corporation at (800) 244-7668, select 2.

Intraocular Surgery in Kyphosis: An Easier Approach

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Karanjit S. Kooner

2013-06-01

Full Text Available We describe a 49-year-old man with advanced kyphosis and dense cataract, who could only recline to about 40° from the vertical axis despite a maximal reverse Trendelenburg position and pillows under the head, neck, shoulders and knees. With a single corneal retraction suture at 6 o'clock, the eye could be rotated horizontally, which enabled the surgeon to perform a complex cataract surgery despite prior glaucoma shunt, posterior synechiae, a small pupil and the need to stain the capsule. As the eye can be brought into any desired position with a retraction suture, patients with kyphosis or other conditions that prevent them from assuming a supine position can still have safe intraocular procedures. This maneuver reduces the need to tilt patients to an uncomfortable position that may cause pain, increased breathing difficulty and elevated posterior vitreous pressure.

La calidad y el valor percibido en el transporte de mercancías en España y su importancia en la segmentación de clientes

OpenAIRE

Irene Gil Saura; Gloria Berenguer Contrí; María Eugenia Ruiz Molina; Santiago Ospina Pinzón

2015-01-01

En el estudio académico de las actividades logísticas y específicamente del transporte de mercancías, se ha señalado la influencia de la calidad del servicio en la generación y percepción de valor, así como la importancia de estos dos constructos en el proceso de evaluación del servicio en este entorno particular. En este trabajo se pretende identificar y caracterizar segmentos de empresas que prestan servicios de gestión del transporte internacional de mercancías (transitarias), con ba...

Álgebra vectorial y geometría euclidiana

OpenAIRE

Salazar Caicedo, José Alonso

1992-01-01

Las leyes del álgebra vectorial asociadas al conjunto de los segmentos dirigidos del plano (o del espacio), en conexión con un producto interior, permiten demostrar una gran variedad de proposiciones y teoremas de la geometría clásica euclidiana, utilizando procedimientos y técnicas relativamente simples. Desde un punto de vista didáctico y pedagógico, surge el problema de examinar hasta qué punto es posible recuperar gran parte del arsenal de ideas fructíferas que proporcionaban a otras g...

Study of the volleyball setter behaviour in through taped analysis of body angles Estudio del comportamiento de la colocadora en voleibol a través del análisis cinemático de ángulos corporales

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E. Hernández

2010-09-01

Full Text Available

This study analyses the setting in volleyball of two setters that play at the highest level of Spanish volleyball, in order to find opponent's movements pattern that may be predict where the ball will be set. A descriptive research design has been done by kinematical analysis through cinematographic techniques. The results indicate that relationships between the wide angle view of some body segments' and different setting tendencies can be established. Results show that analysis of wider angles of elbow, shoulder and hip segments can be useful to anticipate the setting of quick attack in volleyball.
KEY WORDS: Motor Behaviour, Volleyball, Kinematical Analysis, Anticipation, Setting

PALABRAS CLAVE: Comportamiento motor, voleibol, análisis cinemático, anticipación, colocación.

Sectioning a luxated intraocular lens inside the vitreous cavity.

Science.gov (United States)

Vilaplana, Daniel; Pazos, Marta

2013-07-01

We describe a new technique for sectioning an intraocular lens (IOL) inside the vitreous cavity. The IOL had a broken haptic and was accidentally luxated after a complicated cataract surgery with posterior capsule rupture. The primary indication to cut the IOL in half inside the vitreous cavity is to preserve the anterior capsule integrity, especially in a small-sized capsulotomy, allowing subsequent implantation of a new IOL in the sulcus with the optical zone captured in the capsulorhexis. Neither author has a financial or proprietary interest in any material or method mentioned. Copyright © 2013 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved.

[Scheimpflug photography for the examination of phakic intraocular lenses].

Science.gov (United States)

Baumeister, M

2014-10-01

High myopia phakic intraocular lenses (IOL) have become an established means of surgical correction for high ametropia. Scheimpflug photography is one of the methods which are frequently applied for postoperative examination of the implants. Results from published studies employing Scheimpflug photography for examination of anterior chamber angle-fixated, iris-fixated and sulcus-fixated phakic IOLs were evaluated. In several published studies Scheimpflug photography was used to examine the position of the implant and opacification of the crystalline lens. The results provided valuable evidence for the improvement of phakic IOL design. Scheimpflug photography offers an easy to use, rapid non-contact examination of phakic IOLs.

CLINICAL PRESENTATION OF LENS INDUCED GLAUCOMA: STUDY OF EPIDEMIOLOGY, DURATION OF SYMPTOMS, INTRAOCULAR PRESSURE AND VISUAL ACUITY

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Venkataratnam

2015-10-01

Full Text Available BACKGROUND: Lens Induced Glaucoma is a common cause of ocular morbidity. OBJECTIVES: Our study was to know the Epidemiological factors, Duration of Symptoms, Visual Acuity and Intraocular Pressure in the clinical Presentation of Lens Induced Glaucoma. MATERIALS AND METHODS : This w as a tertiary hospital based prospective study in the department of Glaucoma, Sarojini Devi Eye Hospital and Regional Institute of Ophthalmology (RIO, Osmania Medical College, Hyderabad over a period from March 2015 to August 2015. 50 Patients clinically diagnosed as Lens Induced Glaucoma (LIG were studied with the data of Age, Sex, literacy, Laterality and Rural / Urban status with the duration of symptoms, Intraocular pressure and Visual Acuity. The data was analyzed by simple statistical methods. RESULT S: 50 patients, clinically diagnosed as Lens Induced Glaucoma (LIG were studied. Age group distribution was 1(2.0% in 40 - 50yrs, 13 ( 26.0% in >50 - 60yrs, 26(52.0% in >60 - 70yrs and 10(20.0% in > 70 yrs. Sex distribution was 23(46.0% of Males and 27(54.0% of Females. Urban / Rural status was 15(30.0% of Urban and 35(70.0% of Rural. Literacy status was 7(14.0% of Literate and 43(86.0% of Illiterate. Laterality was RE in 24(48.0% and LE in 26(52.0%. Duration of the presenting symptoms before re porting to the Hospital was 12.0% in 2wks. Intraocular pressure (IOP in mm of Hg showed no case (0.0% in 20 – 40, 27(54.0% in >40 - 60 and 5(10.0% >60 wit h the Mean IOP of 42.12 mm of Hg. Visual Acuity (VA was PL +ve in 24(48.0 and HM - 3/60. CONCLUSIONS: Increasing age, female gender, rural, illiterate, and delayed reporting to the hospital after the pre senting symptoms were the common risk factors with increased Intraocular pressure and poor visual acuity in the clinical presentation of Lens induced Glaucoma.

MR imaging of intraocular hemorrhage

International Nuclear Information System (INIS)

Saint-Louis, L.A.; Weiss, R.; Ellsworth, R.; Chang, S.; Deck, M.D.F.

1987-01-01

The authors evaluated with MR imaging 11 globes (nine patients) with spontaneous or traumatic intraocular hemorrhage. Subretinal blood was present in eight. Intravitreal bleeding was associated in seven and three subchoroidal. The ages of the hemorrhages ranged from 1 day to 6 months. Six of the subretinal and two subchoroidal cases had clotted blood with different intensity on the short TE images but were markedly hypointense on long TR/long TE images. The intravitreal blood was hyperintense on all sequences except in one. All imaging was performed with .5 T, 256 matrix, and 4- and 7- mm section thickness. Because of the varied appearance of hemorrhages, the authors scanned and are scanning two rabbits with intravitreal blood in vivo. Parameters include: 3-mm sections, T1, PD, T2 scans in .3-T and 1.5-T imagers. Initial results for the first 2 days show no change in signal intensity (hyperintense on all sequences). The T1 images show a diminishing intensity up to 8 days, and T2 scans remained hyperintense. These results so far correlate with the patient findings. The authors present the clinical findings and experimental correlation

Spectral properties of common intraocular lens (IOL) types

Science.gov (United States)

Milne, Peter J.; Chapon, Pascal F.; Hamaoui, Marie; Parel, Jean-Marie A.; Clayman, H.; Rol, Pascal O.

1999-06-01

Currently over 50 kinds of intraocular lenses (IOLs) are approved for patient use in the treatment of cataracts and ametropia. These lenses are manufactured from at least 2 kinds of silicones as well as several kinds of acrylic polymers including polyHEMA, Poly HOXEMA, a range of polymethacrylate and polyacrylate formulations. We sought to measure spectral transmission curves of a range of IOLS in the UV-visible and near IR spectral regions in order to better characterize their optical properties and to provide a baseline from which to assess their alteration following implantation over time. Consideration of how this may best be achieved are discussed. The variable ability of both explained IOLs and some samples from a range of manufacturers to block UV wavelengths is commented upon.

MANAGEMENT OF RESIDUAL REFRACTIVE ERROR AFTER CATARACT PHACOEMULSIFICATION. PART 2. INTRAOCULAR APPROACHES

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K. B. Pershin

2017-01-01

Full Text Available The review presents an  analysis  of the  literature  data  on  the  methods of surgical  correction of residual  refractive  error after cataract phacoemulsification. Keratorefractive and intraocular approaches are  considered in details.  A comparison of the  efficacy and  safet y  of different groups   of methods on  the  example  of comparative studies is given.  Historically earlier  keratorefractive methods (laser  vision correction with LASIK and  PRK techniques on intact  eyes,  LASIK after  implantation  of multifocal  IOLs and arcuate keratotomy  after  phaco  are  indicated  for  the  correction of astigmatic refractive  error and  a small  spherical refractive error. Intraocular methods, including the  replacement of the  IOL  and  «piggyback» IOLs implantation  are  used  to  correct a large spherical refractive error. The introduction  of new  technology, the  implantation  of light-adjustable  IOLs, will  expand  the  existing evidence  and provide greater predictabilit y and efficiency of the  method  of correction of residual  refractive error.

Application of diffractive aspheric multifocal intraocular lens in the Uighur in phacoemulsification

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Nuersimanguli·Mijiti

2016-05-01

Full Text Available AIM:To research the efficacy and safety of diffractive aspheric multifocal intraocular lens(MIOLin the Uighur in phacoemulsification to provide guidance for the clinical treatment of cataracts patients in Xinjiang region. METHODS:Two hundred and twenty-eight Uygur patients(280 eyesreceived phacoemulsification from April 2012 to March 2013 were randomly divided into multifocal group(106 cases with 146 eyesand monofocal group(122 cases with 134 eyes. Patients were followed up for 3mo. The intraocular pressure(IOP, uncorrected distance visual acuity, uncorrected near vision, best-corrected distance visual acuity and best corrected near vision were measured. The delensed rate, visual quality, and satisfaction for lenses in the form of questionnaires were compared. RESULTS:Multifocal group was better on the uncorrected near vision than monofocal group(PP>0.05. The contrast sensitivity of multifocal group under scotopia at spatial frequency 3c/d was lower than that of monofocal group(PP>0.05. Delensed rate of multifocal group was higher than that of monofocal group(PP>0.05.CONCLUSION:MIOL with phacoemulsification can provide patient good full range vision, especially on good near vision. The patients with MIOL implanted have a higher delensed rate, less postoperative adverse symptoms, quicker recovery and satisfaction.

Tafluprost once daily for treatment of elevated intraocular pressure in patients with open-angle glaucoma

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Liu Y

2012-12-01

Full Text Available Yang Liu, Weiming MaoDepartment of Cell Biology and Anatomy, North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TXAbstract: Glaucoma is a leading cause of visual loss worldwide. Current antiglaucoma therapy focuses on lowering intraocular pressure to a safe level. In recent years, prostaglandin analogs have become the first-line agents for treating open angle glaucoma. Tafluprost, which was first reported in 2003, is a novel prostaglandin analog, and has been shown to be a potent ocular hypotensive agent in a number of preclinical and clinical studies. Also, its unique preservative-free formulation helps to decrease preservative-associated ocular disorders and improve patient compliance. In this review, studies from 2003 to 2012 focusing on the structure, metabolism, efficacy, and safety of tafluprost are summarized. These studies suggested that application of tafluprost once daily is a safe and effective treatment for patients with open angle glaucoma.Keywords: tafluprost, prostaglandin analog, glaucoma, intraocular pressure, preservative-free formulation

Customized toric intraocular lens implantation for correction of extreme corneal astigmatism due to corneal scarring

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R Bassily

2010-03-01

Full Text Available R Bassily, J LuckOphthalmology Department, Royal United Hospital, Combe Park, Bath, UKAbstract: A 76-year-old woman presented with decreased visual function due to cataract formation. Twenty-five years prior she developed right sided corneal ulceration that left her with 10.8 diopters (D of irregular astigmatism at 71.8° (steep axis. Her uncorrected visual acuity was 6/24 and could only ever wear a balanced lens due to the high cylindrical error. Cataract surgery was planned with a custom designed toric intraocular lens (IOL with +16.0 D sphere inserted via a wound at the steep axis of corneal astigmatism. Postoperative refraction was -0.75/+1.50 × 177° with a visual acuity of 6/9 that has remained unchanged at six-week follow-up with no IOL rotation. This case demonstrates the value of high power toric IOLs for the correction of pathological corneal astigmatism.Keywords: intraocular lens, corneal ulceration, visual acuity, scarring

Clinical observation of small-incision extracapsular cataract extraction with intraocular lens implantation for the treatment of cataract in the sight restoration project

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Xiao-Jian Cheng

2014-04-01

Full Text Available AIM: To analyze the clinical effects of small-incision extracapsular cataract extraction with intraocular lens implantation for the treatment of cataract.METHODS:Totally 642 cases 676 eyes of cataract were treated by small-incision extracapsular cataract extraction with intraocular lens implantation. Complication during and after operations and postoperative visual acuity was observed.RESULTS:Visual acuity of 670 eyes was ≥0.05 and off-blindness rate was 99.11%, and there was 627 eyes ≥0.3 and the off-disability rate was 92.75% after 1mo. Rupture of posterior capsule during surgery occurred in 24 eyes. Fifty-four eyes were corneal edema, and anterior chamber exudation were 26 eyes, and 23 eyes were hypertension after operation. CONCLUSION: There are a little complications during and after operation for cataract treated by small-incision extracapsular cataract extraction with intraocular lens implantation. Patients have good recovery after operation. This operation does not need high-standard equipments and is suitable in the sight restoration project.

Valoración del crecimiento físico por medio de la proporcionalidad corporal en escolares peruanos que viven a moderada altitude

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Rossana Anelice Gomez

2012-10-01

Full Text Available http://dx.doi.org/10.5007/1980-0037.2012v14n6p690 La estrategia del Phantom es un instrumento para medir la proporcionalidad corporal que permite comparar el crecimiento de los segmentos y dimensiones corporales. El objetivo del presente estudio radica en valorar el crecimiento físico por medio de la proporcionalidad corporal de escolares de 6 a 12 años que viven a moderada altitud. El estudio es de tipo descriptivo Transversal. Participaron de la investigación 482 damas y 473 varones de 6 a 12 años de condición socioeconómica media. Los escolares fueron seleccionados de forma probabilística estratificada de un total de 6659 alumnos. Se evaluó las medidas antropométricas de peso (kg, estatura (m, cinco pliegues cutáneos (mm, cuatro circunferencias corporales y cuatro diámetros óseos. El análisis de la proporciona­lidad se efectuó por medio del modelo teórico del Phantom propuesto por Ross y Wilson (1974. Los resultados del Z-escore del Phantom para ambos géneros muestran valores negativos de forma general para el peso corporal (-3,7 a -1,7, pliegues cutáneos (0,5 a -1,5 y circunferencias corporales (-0,9 a -1,3. A su vez, los diámetros óseos evidencian valores positivos en todas las edades y en ambos géneros (1,0 a 3,2. Los resultados sugieren que los escolares de moderada altitud se caracterizan por presentar un lento crecimiento respecto al peso corporal, pliegues cutáneos y circunferencias corporales y en relación a los diámetros óseos muestran una tendencia a la robustez.

Repressão e violência de Estado contra os segmentos populares durante os governos militares. Rivail Carvalho Rolim

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Rivail Carvalho Rolim

2015-11-01

Full Text Available Inúmeras pesquisas analisaram variados aspectos acerca do exercício do poder durante o regime militar, destacando inclusive a repressão e a violência levada a cabo pelas forças repressivas contra os grupos políticos que se opuseram a esse regime. Contudo, depois de anos de pesquisas novos olhares começam a ser lançados sobre a ditadura no Brasil. Como havia uma concepção bastante ampla relativa às tensões e aos antagonismos existentes no país e com os segmentos sociais que poderiam provocá-las, este trabalho tem como objetivo analisar a violência do Estado contra as classes populares, tendo em vista que foram consideradas como portadoras de um potencial desagregador e perigoso e despreparadas para viver em uma sociedade moderna, industrializada e de vida marcadamente urbana.

The case for intraocular delivery of PPAR agonists in the treatment of diabetic retinopathy.

LENUS (Irish Health Repository)

Treacy, Maxwell P

2012-09-01

Systemic therapeutics targeting the peroxisome proliferator-activated receptors have been found to be beneficial in the treatment of diabetic retinopathy. In this paper, we provide a rationale for the use of these therapeutics as intraocular agents. In addition, we introduce the peroxisome proliferator-activated receptors and describe their functions in response to the drugs.

[Intraocular lens implantation with one loop haptic amputated: a new propose to the subluxation lens surgical treatment].

Science.gov (United States)

Ventura, Marcelo; Endriss, Daniela

2010-01-01

To evaluate the postoperative results of congenital lens subluxation corrected by a new technique. Retrospective chart review of 21 eyes of 13 patients with no traumatic lens subluxation who underwent surgery in Altino Ventura Foundation from April, 1999 to April, 2004. The mean age was 8.7 +/- 5.4 years old, and the mean follow-up period was 21.5 +/- 19.3 months. Patients underwent phacoaspiration, endocapsular ring and intraocular lens (IOL) implantation. The implanted IOL had one loop haptic excised and was supported above the ring, inside the capsular bag promoting intraocular lens centralization. Visual acuity improvement was observed in all cases. There was a significant reduction of the spherical equivalent and spherical component comparing the pre and postoperative refraction (psubluxation surgical treatment, promoting lens centralization and postoperative visual acuity improvement.

Evaluación del estado trófico de la Laguna de Ayarza utilizando el modelo de simulacion WASP

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Andrea Eunice Rodas

2017-03-01

Full Text Available Los modelos de simulación de calidad de agua, son herramientas ambientales que permiten interpretar y predecir la respuesta de un cuerpo de agua a las cargas contaminantes externas. El programa de simulación de calidad de agua (WASP versión 7.41 se utilizó para simular y evaluar la relación entre los nutrientes externos y la calidad de agua, en la Laguna de Ayarza, Santa Rosa, Guatemala. El modelo toma en cuenta dos ciclos de nutrientes (N y P, por medio de variables de calidad de agua: temperatura, nitrato (NO 3 , amonio (NH 4 , nitrógeno total (TN,fosfato (PO 4 , fósforo total (TP, y oxígeno disuelto (OD. El modelo se construyó tomando en cuenta la morfología del lago y las condiciones climáticas. El lago se dividió en siete segmentos, tomando en cuenta los flujos y los parámetros fisicoquímicos para cada uno. Se determinó el coeficiente de dispersión del lago y se calibró utilizando los datos de octubre 2010 a febrero 2011. El post-procesamiento se realizó por medio del software GNUPLOT. Los resultados de la modelación muestran que los valores de fósforo en todo el lago, presentan niveles de eutrofización, los valores de nitrógeno presentan niveles oligotróficos e indican que el lago soporta carga contaminanterelativamente alta.

Angiografía del día siguiente tras fibrinólisis exitosa frente al tratamiento convencional, en el síndrome coronario agudo con elevación del segmento ST, fibrinolisado

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José D. Cascón-Pérez, MD

2012-01-01

Conclusiones: la angiografía del día siguiente se asocia con una reducción de la estancia media respecto al tratamiento convencional. Además, parece mostrar una tendencia (no significativa de reducción de mortalidad al año, sin que aumente el número de complicaciones hemorrágicas.

Implantation of a double iris-claw intraocular lens in an aphakic nanophthalmic eye

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Filiz Avsin Ozdemir Sarioglu

2017-01-01

Full Text Available A 55-year-old female with an aphakic nanophthalmic eye underwent a secondary intraocular lens implantation (IOL with double Artisan aphakia iris claw IOLs (ICIOLs and was evaluated in this research. The patient's preoperative best-corrected visual acuity (BCVA of the right eye was 0.4 (0.4 logMAR (with + 21.00 D, postoperative 1st and 3rd month, 1st year, and 3 years BCVAs were 0.4 (0.4 logMAR. The intraocular pressure was 15 mmHg preoperatively, and 14, 12, 12, and 15 mmHg postoperatively at 1st and 3rd month, 1st year, and 3 years, respectively. The preoperative endothelial cell density (ECD was 2372 cells/mm2, and postoperative ECDs were 2352, 2391, 2246, and 2240 cells/mm2 at 1st and 3rd months, at 1st year, and 3 years respectively. In aphakic nanophthalmic eyes with inadequate capsular support, which require high IOL dioptry, the implantation of double ICIOLs (one in front of the iris and the other behind the iris seems to be safe and provides good visual rehabilitation.