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Search Results: 1 - 10 of 251704 matches for " LUIS OSCAR; CáRDENAS CENTENO "
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índice quístico: Valor pronóstico y terapéutico
Marrero Riverón,Luis Oscar; Cárdenas Centeno,Orlando M. de; Fernández Carpio,Adrián A.; Castro Soto del Valle,Antonio; Rey Valdivia,Ninel;
Revista Cubana de Ortopedia y Traumatolog?-a , 1999,
Abstract: a retrospective study of 47 patients who underwent surgery at the international scientific orthopedic complex between january, 1990, and december, 1994, due to solitary bone cyst confirmed by means of the anatomopathological study was carried out. the cystic index was obtained in all patients by using kaelin and macewen’s formula. 31 patients were males and 95.75% were under 20. relapses after the curettage and bone filling were frequent. when the cystic index was over 3.5 in the femur and over 4 in the humerus, the number of pathological fractures and relapses was also high.
Gammagrafía ósea con pinhole en la enfermedad de Legg-Calvè-Perthes
Marrero Riverón,Luis Oscar; álvarez Cambras,Rodrigo; Cárdenas Centeno,Orlando M. de; Roché Egües,Hilda Elena; Martínez González,Miguel;
Revista Cubana de Ortopedia y Traumatolog?-a , 1999,
Abstract: bone scintigraphy with pinhole collimator and the classification derived from its utilization in the study of the legg-calvé-perthes disease is introduced in our environment. 227 patients with presuntive diagnosis of this disease underwent scintigraphy at the nuclear medicine department of the “frank país” international scientific orthopedic complex from september, 1996, to december, 1997 (including both). the diagnosis was confirmed in 28 cases (9 with normal x-rays) and other 31 affections were diagnosed. the relationship between radiography and scintigraphy was established, allowing to have a prognosis of the affection.
Hibernoma: Presentación de un caso
CáRDENAS CENTENO,ORLANDO M. DE; MARRERO RIVERóN,LUIS OSCAR; áLVAREZ CAMBRAS,RODRIGO; GONZáLEZ CABRERA,RUBéN DARíO; TAMAYO FIGUEROA,ALICIA; SáNCHEZ NODA,EDDY;
Revista Cubana de Ortopedia y Traumatolog?-a , 1998,
Abstract: a patient with a hibernoma of the left thigh, which is a rare benign tumor derived from the brown adipose tissue, is presented. the clinical picture and the therapeutics applied are explained. literature is reviewed, too.
Captación de 99mTc-MIBI en los tumores óseos: Estudio comparativo con el 99mTc-MDP
Marrero Riverón,Luis Oscar; álvarez Cambras,Rodrigo; Cárdenas Centeno,Orlando M. de; Tamayo Figueroa,Alicia; Perera Pintado,Alejandro; Quintana Rodríguez,Francisco José;
Revista Cubana de Ortopedia y Traumatolog?-a , 1999,
Abstract: a prospective study of 38 patients with tumorlike lesions of the skeleton (19 malignant tumors, 19 bening tumors and pseudotumorlike lesions) was conducted. these patients underwent tc-mdp and tc-mibi scintigraphy at the department of nuclear medicine of the “frank país” international scientific orthopedic complex between may, 1996, and april, 1997 (including both). the visibility of the lesions and the presence of intratumorlike necrosis and of metastasis were determined. the injured area/sound contralateral area (i/s) relation was calculated. by using 99mtc-mibi it was posssible to visualize all the malignant lesions and only 2 of the bening and pseudotumorlike lesions. 7 intratumorlike necrosis and 9 patients with metastasis were detected. a sensitivity of 100%, a specificity of 89.5% and a diagnostic accuracy of 94.7% were obtained. it was concluded that 99mtc-mibi is a radiopharmaceutical useful in the study of bone tumors.
Dermatofibrosarcoma protuberans: Presentación de un caso y revisión de la literatura
CáRDENAS CENTENO,ORLANDO M. DE; áLVAREZ CAMBRAS,RODRIGO; MARRERO RIVERóN,LUIS OSCAR; REY VALDIVIA,NINEL; SáNCHEZ NODA,EDDY; CASTRO SOTO DEL VALLE,ANTONIO; áLVAREZ PRIETO,RAFAEL;
Revista Cubana de Ortopedia y Traumatolog?-a , 1998,
Abstract: a patient with a dermatofibrosarcoma protuberans on the left thigh, a rare sarcoma of the soft parts, is presented. the clinical picture and the therapeutics used are exposed. literature is also reviewed.
Presentación atípica de un miofibroma aponeurótico calcificante
CáRDENAS CENTENO,ORLANDO M. DE; TAMAYO FIGUEROA,ALICIA; GONZáLEZ CABRERA,RUBéN DARíO; MARRERO RIVERóN,LUIS OSCAR; BERNAL GONZáLEZ,MARIO; SáNCHEZ NODA,EDDY; ESCANDóN LEóN,FRANK;
Revista Cubana de Ortopedia y Traumatolog?-a , 1998,
Abstract: a patient with a juvenile aponeurotic myofibroma of the left leg, an atypical localization of this tumor derived from the fibrous tissue, is presented. the clinical picture and the therapeutics used with these patients are exposed. a literature review is made.
Fascitis nodular proliferativa: A propósito de un caso
MARRERO RIVERóN,LUIS OSCAR; CáRDENAS CENTENO,ORLANDO M. DE; TAMAYO FIGUEROA,ALICIA; GONZáLEZ CABRERA,RUBéN DARíO; BERNAL GONZáLEZ,MARIO; SáNCHEZ NODA,EDDY;
Revista Cubana de Ortopedia y Traumatolog?-a , 1998,
Abstract: a patient with proliferative nodular fascitis of the pelvis, a bening tumor derived from the fibrous tissue, is presented. the clinical picture and the therapeutics applied to the patients are approached. literature is also reviewed.
Calcinosis tumoral: Reporte de cuatro casos
MARRERO RIVERóN,LUIS OSCAR; CáRDENAS CENTENO,ORLANDO M. DE; RONDóN GARCíA,VILMA; áLVAREZ CAMBRAS,RODRIGO; SáNCHEZ NODA,EDDY; CASTRO SOTO DEL VALLE,ANTONIO; BERNAL GONZáLEZ,MARIO; RODRíGUEZ VáZQUEZ,MATILDE;
Revista Cubana de Ortopedia y Traumatolog?-a , 1998,
Abstract: 4 patients auffering from tumoral calcinosis, a rare entity considered within the heterotopic calcifications, are presented. the clinical, imaging and pathological findings are illustrated and discussed. literature is reviewed.
Poder calorífico superior de bagazo, médula y sus mezclas, provenientes de la ca?a de azúcar de Tucumán, R. Argentina
Diez,Oscar A.; Cárdenas,Gerónimo J.; Mentz,Luis F.;
Revista industrial y agr?-cola de Tucum??n , 2010,
Abstract: bagasse, or the biomass remaining after sugarcane stalks are crushed to extract their juice, is the primary fuel source for steam generation to supply for all the needs of a typical sugar mill in tucumán, argentina. in factories equipped to separate bagasse from pith to supply fibre for paper producing plants, pith and its blends with bagasse at different proportions are also available as fuels. the value of bagasse as a fuel depends on a number of ecological, agronomic and industrial factors, and it affects steam generation efficiency. the aim of this report is to assess the value of bagasse as a fuel in sugar mills in tucumán. a total of 419 bagasse samples, collected from different sugar mills in tucumán, were processed and tested with a bomb calorimeter to measure their higher calorific value (pcs) and its correlation with ash contents. in order to identify the relationship between ash content in bagasse and its ignition delay, pcs was calculated one minute after ignition. bagasse pcs from three widely used sugarcane varieties was also determined. results showed that 17375 kj/kg is eligible as a mean higher calorific value for bagasse from sugar mills in tucumán, whereas pith mean higher calorific value can be set at 17.075 kj/kg. these values should be adjusted according to ash content level. although variability amongst mean pcs was low, it was possible to identify the relationship between ecosystem and sugarcane development, its final fibre content and, thereby, its calorific value.
Poder calorífico superior de bagazo, médula y sus mezclas, provenientes de la ca a de azúcar de Tucumán, R. Argentina Calorific value of sugarcane bagasse, pith and their blends (Tucumán, Argentine Republic)
Oscar A. Diez,Gerónimo J. Cárdenas,Luis F. Mentz
Revista Industrial y Agrícola de Tucumán , 2010,
Abstract: En Tucumán, el principal combustible empleado para generar el vapor necesario para la fabricación de azúcar a partir de ca a es el residuo fibroso (bagazo) resultante de la extracción del jugo. En algunas fábricas donde existe la posibilidad de desmedular bagazo para la entrega de fibra a la producción de papel, coexisten junto al bagazo, médula y mezclas de bagazo y médula en diferentes proporciones, como combustible disponible. La calidad del bagazo como combustible varía en función de factores ecológicos, agronómicos e industriales, y es determinante en la eficiencia del proceso de generación de vapor. El objetivo de este trabajo fue evaluar la calidad como combustible del bagazo que se utiliza industrialmente. Un total de 419 muestras de bagazo obtenidas en distintos ingenios de la provincia de Tucumán durante la zafra 2004, fueron procesadas y ensayadas en bomba calorimétrica para obtener el valor del poder calorífico superior (PCS) y la incidencia del contenido de cenizas sobre el valor final de PCS. A fin de identificar la influencia del contenido de cenizas en el retardo del encendido del combustible, se calcularon los valores de PCS al minuto de iniciado el encendido en la bomba calorimétrica. El espectro analítico se completa con determinaciones de PCS en bagazo de tres variedades de ca a de amplia difusión comercial. Los resultados obtenidos indicaron que es aconsejable utilizar 17.375 kJ/kg como valor promedio de PCS en el bagazo de ca a en base seca, que se industrializa en Tucumán. Para la médula como combustible, se puede utilizar 17.075 kJ/kg como tal valor. Estos valores son ajustables de acuerdo al contenido de cenizas. Si bien los valores promedio obtenidos muestran baja dispersión, resultó posible identificar la incidencia del ecosistema en el desarrollo de la ca a de azúcar, el cual condiciona el contenido final de fibra y, consecuentemente, su poder calorífico. Bagasse, or the biomass remaining after sugarcane stalks are crushed to extract their juice, is the primary fuel source for steam generation to supply for all the needs of a typical sugar mill in Tucumán, Argentina. In factories equipped to separate bagasse from pith to supply fibre for paper producing plants, pith and its blends with bagasse at different proportions are also available as fuels. The value of bagasse as a fuel depends on a number of ecological, agronomic and industrial factors, and it affects steam generation efficiency. The aim of this report is to assess the value of bagasse as a fuel in sugar mills in Tucumán. A total of 419 bagasse samples, collected from
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