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Search Results: 1 - 10 of 2090 matches for " Viúdez-Berral "
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Current management of gastric cancer Situación actual en el tratamiento del cáncer gástrico
Antonio Viúdez-Berral,Coro Miranda-Murua,Fernando Arias-de-la-Vega,Irene Hernández-García
Revista Espa?ola de Enfermedades Digestivas , 2012,
Abstract: Gastric cancer is a disease with high incidence and mortality in our population. The prognosis of patients with this disease is closely related to the neoplasm stage at diagnosis, including the following characteristics of the tumor: extension into the gastric wall thickness, spread to locoregional lymph nodes and the ability to generate distant metastases, as described by the TNM classification. For localized tumors characterized only by invasion of mucosa or submucosa at diagnosis, survival at 5 years is between 70 and 95% with exclusive surgical management; however, when extension into the gastric wall is higher and/or there is locoregional nodal involvement, survival decreases to 20-30% at 5 years. Currently, at high-volume centers, the extent of gastrectomy is individualized based on several parameters, which in an increasing number of cases allows a total gastrectomy with D2 lymphadenectomy and preservation of the spleen and pancreas. This improved procedure increases the chance of R0 surgery and improves the relationship between resected and affected lymph nodes, resulting in a decreased risk of the long-term locoregional recurrence. To improve these results, different therapeutic strategies combining chemotherapy or chemoradiotherapy with surgery have been tested. Previously, the Intergroup 0116 clinical trial, published in 2001, which changed clinical practice in the United States, showed that adjuvant chemoradiotherapy improved survival (from 26 to 37 months overall survival) of these patients. In Europe, perioperative chemotherapy has been considered the standard treatment, since the publication of two randomized phase III trials showed an increase at 5 years survival in the group treated with chemotherapy. El cáncer gástrico es un tumor de alta incidencia y mortalidad en nuestro medio, y su pronóstico está íntimamente relacionado con la situación neoplásica al diagnóstico, que incluye su extensión en el grosor de la pared gástrica, sobre los ganglios linfáticos locorregionales y su capacidad de generar metástasis a distancia, extensión basada en la clasificación TNM. En aquellos tumores localizados al diagnóstico, caracterizados por la invasión únicamente de mucosa-submucosa, la supervivencia a 5 a os se establece entre el 70 y el 95% con manejo quirúrgico exclusivo, sin embargo, cuando la extensión en la pared es mayor y/o existe afectación ganglionar locorregional, la supervivencia disminuye al 20-30% a 5 a os. Actualmente en centros con alto volumen de pacientes, la extensión de la gastrectomía se individualiza en función de varios parámet
Current management of gastric cancer
Viúdez-Berral,Antonio; Miranda-Murua,Coro; Arias-de-la-Vega,Fernando; Hernández-García,Irene; Artajona-Rosino,Alicia; Díaz-de-Lia?o,álvaro; Vera-García,Ruth;
Revista Espa?ola de Enfermedades Digestivas , 2012, DOI: 10.4321/S1130-01082012000300006
Abstract: gastric cancer is a disease with high incidence and mortality in our population. the prognosis of patients with this disease is closely related to the neoplasm stage at diagnosis, including the following characteristics of the tumor: extension into the gastric wall thickness, spread to locoregional lymph nodes and the ability to generate distant metastases, as described by the tnm classification. for localized tumors characterized only by invasion of mucosa or submucosa at diagnosis, survival at 5 years is between 70 and 95% with exclusive surgical management; however, when extension into the gastric wall is higher and/or there is locoregional nodal involvement, survival decreases to 20-30% at 5 years. currently, at high-volume centers, the extent of gastrectomy is individualized based on several parameters, which in an increasing number of cases allows a total gastrectomy with d2 lymphadenectomy and preservation of the spleen and pancreas. this improved procedure increases the chance of r0 surgery and improves the relationship between resected and affected lymph nodes, resulting in a decreased risk of the long-term locoregional recurrence. to improve these results, different therapeutic strategies combining chemotherapy or chemoradiotherapy with surgery have been tested. previously, the intergroup 0116 clinical trial, published in 2001, which changed clinical practice in the united states, showed that adjuvant chemoradiotherapy improved survival (from 26 to 37 months overall survival) of these patients. in europe, perioperative chemotherapy has been considered the standard treatment, since the publication of two randomized phase iii trials showed an increase at 5 years survival in the group treated with chemotherapy.
Composi??o corporal de pacientes acamados por fraturas do quadril
Berral, Francisco José;Moreno, Marcos;Berral, Carlos Javier;Contreras, Marcos Emilio Kuschnaroff;Carpintero, Pedro;
Acta Ortopédica Brasileira , 2008, DOI: 10.1590/S1413-78522008000300004
Abstract: hip fractures are a major cause of hospitalization among the elderly, and constitute a considerable social and economic burden. the current mortality rate one year after hip fracture is over 33%, the risk of death is greatest 4 to 6 months after fracture. the objective of this study was to use anthropometric methods and physiological energy-expenditure values to assess changes in body composition during hospitalization, in elderly patients admitted for fractures of the proximal femur. a prospective study was performed using a consecutive sequence of 45 patients with diagnosed hip fracture. in all cases, direct measurements and indirect estimate-based anthropometric evaluation were performed in the first 24 hours following admission, and again one week after admission. by one week after admission, there was a decrease in mean arm girth (0.73 cm, p=0.0052) and in triceps fold thickness (1.41 mm, p=0.0181), but not in the other variables tested. anthropometric evaluation as a means of charting body composition, in conjunction with the indirect estimates suggested here, may help to determine nutritional status and calorie requirements in elderly patients.
Total Nitrogen and Available Phosphorus Dynamics in Soils Regenerating from Degraded Abandoned Rubber Plantation in Orogun Area of the Rainforest Zone of Southern Nigeria
VI Ichikogu
Ethiopian Journal of Environmental Studies and Management , 2012,
Abstract: Total nitrogen and available phosphorus concentration of soils in three secondary forest fields aged 1, 5 and 10 years of age regenerating from degraded abandoned rubber plantation (Hevea brasiliensis) and a mature forest in the west African Rainforest belt in southern Nigeria were investigated in order to determine the trend of change in the properties of soil in secondary forest during the course of forest restoration from degraded deserted rubber plantation (Hevea brasiliensis). There was a continuous increase in the concentration of total nitrogen in the soil (both topsoil and subsoil). The concentrations of total nitrogen and available phosphorus in the topsoil are higher than the subsoil. The concentration of available phosphorus during the first five years of secondary forest regeneration increased, after which their values declined by the tenth year in both the topsoil and the subsoil. Should this trend of decline in the concentration of phosphorus continue phosphorus may become a limiting factor to plant growth the older the secondary forests become.
The Dynamics of Soil Physical Properties and Exchangeable Cations in Secondary Forests Regenerating from Degraded Abandoned Rubber Plantation (Hevea brasiliensis) in Orogun Area of Southern Nigeria
VI Ichikogu
Ethiopian Journal of Environmental Studies and Management , 2011,
Abstract: The regeneration of soil physicochemical properties in three secondary forest fields aged 1, 5 and 10 years of age following the abandonment of degraded rubber (Hevea brasiliensis) plantation in Orogun were investigated. In addition a mature forest was selected and investigated as the control. Values of important indices of soil physicochemical parameters were ascertained for the three secondary forests categories and the mature forest. The results obtained revealed that there was no significant improvement or changes in soil particle size composition during the course of secondary forest regeneration. The concentrations of the exchangeable cations were higher in the mature forest than the different secondary forest categories. Soil bulk density decreased while water holding capacity and total porosity of soil increased with increasing age of secondary forest. Exchangeable cations improved in the first five year of secondary forest regeneration, after which their values declined by the tenth year in the topsoil (0-10cm layer). Similarly, exchangeable potassium and sodium improved significantly in the subsoil (10-30cm layer) by the fifth year of secondary forest regeneration from degraded abandoned rubber plantation, after which their values declined by the tenth year. However, exchangeable magnesium and calcium declined in the subsoil throughout the course of forest recovery. Effective cation exchange capacity in the topsoil and the subsoil increased linearly with increasing age of secondary forest, while soil pH decreased with increasing age of secondary forest. These results demonstrate that fallowing exerts beneficial effects on soil fertility (i.e. soil fertility improved as fallow age increased).
Organic Matter Dynamics in Soils Regenerating from Degraded Abandoned Rubber Plantation in Orogun Area of the Rainforest Zone of Southern Nigeria
VI Ichikogu
Ethiopian Journal of Environmental Studies and Management , 2011,
Abstract: The area of secondary forest (SF) regenerating from degraded abandoned rubber (Hevea brasiliensis) plantation is increasing in the rainforest zone of south southern Nigeria; however, the build-up of soil organic matter following abandonment is not well understood. This study examined the build-up of soil organic matter in a mature forest and three secondary forest fields aged 1, 5 and 10 years of age following the abandonment of degraded rubber (Hevea brasiliensis) plantation in Orogun in a part of the rainforest zone of south southern Nigeria. This is in order to ascertain the rate of build-up of organic matter in the soil during the course of forest regeneration from degraded abandoned rubber plantation (Hevea brasiliensis). There was a progressive increase in organic matter content of the soil with increasing age of the secondary forest. Organic matter increase was more rapid in the topsoil (0-10cm) than the subsoil (10-30cm): the level of organic matter in the topsoil reached 92.94% of the level of organic matter in the mature forest topsoil by the tenth year and 84.62% of the level of organic matter in the mature forest subsoil by the tenth year. The concentration of organic matter in the topsoil is higher than the subsoil. Reviews of the reported trends in soil organic matter build up during forest establishment after agricultural use show no common trend. This study showed a great variation in soil organic matter build up even within the same locality.
Membranas de impermeabilización y láminas geotextiles filtrantes
Vié, George
Informes de la Construccion , 1979,
Abstract: Georges Vié, Mining engineer This article deals with the various uses of non-traditional products: — the bituminous membrane, used for solving water-proofing problems in tanks and ponds having a relatively low water load, — the geotextile coating of non-woven sinthetic fibers, used because of their filtering capacity in the construction of the runway In the Marignane (Marseille) airfield. Se exponen en este artículo varios usos de productos no tradicionales: — la membrana bituminosa, que sirve para resolver problemas de impermeabilización en depósitos y embalses, con carga de agua relativamente débil, y — la lámina geotextil, de fibras sintéticas no tejidas, utilizada por su poder filtrante en la construcción de la pista de despegue del aeródromo de Marignane (Marsella). Se explican también las principales características técnicas de estos materiales.
Los últimos progresos en perforación de minas, galerías y canteras
Vié, G.
Informes de la Construccion , 1978,
Abstract: Important progress has been achieved in recent years in the field of drilling and excavation. This article studies some of these improved methods, both in the area of machines and equipment and the explosives field. The potential areas of application of rotary drilling and hydraulic rotary-percussion drilling, the uses for the borehole bottom hammer, the properties of powder and liquid explosives and their possible applications, etc., are examined. Ha habido, durante estos últimos a os, notables progresos en el campo de la perforación. En este artículo se analizan algunos de ellos, tanto en el campo de maquinaria y herramientas, como en el de los explosivos. Se ven los posibles campos de la perforación rotativa y la roto-percusión hidráulica, los usos del martillo fondo del taladro , las características y posibles usos de los explosivos líquidos o pastosos, etc.
Hormigones ligeros y obras públicas. Francia
Vié, G.
Informes de la Construccion , 1982,
Abstract: Not available. Entre las causas del empleo, cada vez más amplio, del hormigón ligero frente al hormigón tradicional se encuentran: menor peso, menor contracción durante el fraguado, transporte menos costoso, colocación y manejo más fácil, etc. En este artículo se describe la realización de una pasarela en Grenoble (Francia), de 125,70 m de longitud, de los cuales 68,80 son de hormigón ligero. El tablero, de una anchura de 6,7 m de longitud y pretensado longitudinalmente, está formado por una viga-cajón de 1,5 m de altura e inercia constante. La cimentación se realizó sobre pilotes de 800 a 1.000 mm de diámetro prefabricados in situ. Los estribos son del tipo contrapeso. La pasarela se construyó en dos mitades, cada una de ellas sobre una orilla del río Isère, uniéndose posteriormente una vez colocadas en su emplazamiento final.
Construcción de túneles mediante máquinas que excavan a sección total (tuneladora) y normas para su utilización
Vié, G.
Informes de la Construccion , 1980,
Abstract: In this article an analysis is made of several interesting results obtained by the use of nonstop drilling machines in various recent w/orks, as well as different improvements carried out follow/ing a number od studies and tests. From this analysis it can be concluded that these machines are only profitable for extensive lengths, and that it is necessary to carry out prior geological studies before commencing drilling operations. Among the improvements are found: the use of activated teeth, whereby the static pressure forces are replaced by dynamic processes; the placement of high-pressure water blasts next to the drilling tools, thus increasing the cutting power; the use of hydraulic transport in small-diameter galleries; the use of aminoplast resin reinforced with fiberglass in order to enhance leakproofness and to improve the lining of the tunnels; etc. En este artículo se analizan algunos resultados interesantes obtenidos por el empleo de máquinas de perforación continua en varias obras de reciente ejecución, así como diversas mejoras realizadas después de diferentes estudios y ensayos. De este análisis se deduce que estas máquinas sólo son rentables para grandes longitudes y que es preciso realizar estudios geológicos previos antes de comenzar la perforación. Entre las mejoras producidas están: la utilización de muelas activadas, con las que se consigue sustituir las fuerzas de presión estática por procesos dinámicos; la colocación de chorros de agua a alta presión junto a las herramientas de perforación, con lo que se aumenta la potencia de corte; el uso del transporte hidráulico en galerías de peque o diámetro; el empleo de resina aminoplasta armada con fibras de vidrio para aumentar la estanquidad y mejorar el revestimiento de los túneles; etc.
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