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Search Results: 1 - 10 of 322953 matches for " Alejandra Catalán B. "
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PóLIPOS ENDOMETRIALES: MANEJO CON HISTEROSCOPIA QUIRúRGICA Y CORRELACIóN HISTOLóGICA
Alejandra Catalán B,Jaime Corvalán A,Valeria Pantoja C,Karen García A
Revista Chilena de Obstetricia y Ginecología , 2007,
Abstract: Se presenta la experiencia quirúrgica en 160 pacientes con diagnóstico ecográfico de pólipo endometrial. Se evalúan las características epidemiológicas, clínicas y la correlación histológica. La edad promedio fue de 50 a os, se analizaron las variables diferenciándolas en premenopáusicas o post menopáusicas, y presencia de síntomas. En todos los subgrupos la incidencia fue igualmente alta para los pólipos endometriales, seguida en frecuencia por los leiomiomas, hiperplasia endometrial y endometrio proliferativo, entre otros. Se encontraron 3 casos de adenocarcinoma endometrial, todos en el subgrupo de las pacientes postmenopáusicas sintomáticas. El procedimiento fue bien tolerado, y sin complicaciones. Destacamos a la histeroscopia como el estándar dorado por su alta sensibilidad y especificidad en el diagnóstico de pólipo endometrial The surgical experience in 160 patients with echographic diagnostic of endometrial polyps, are analyzed. Clinical and pathological characteristics are evaluated. The patient average age was 50 years old; variables were analyzed differentiating them in pre menopausal or post menopausal, according to the presence of symptoms. In all sub-groups the incidence was equally high for the endometrial polyps, followed in frequency by leiomyomas, endometrial hyperplasia and endometria proliferative among others. Three cases of endometrial adenocarcinoma were found, all in the sub-group of the symptomatic post menopausal patients. The procedure was well tolerated, without complications. We emphasized the hysteroscopy procedure as the gold standard by its high sensitivity and specificity in the endometrial polyp diagnosis
MANEJO LAPAROSCóPICO DE MASAS ANEXIALES: EXPERIENCIA LOCAL
Alejandra Catalán B.,Domingo Laiz R.,Jaime Corvalán A.,Diego Masoli I.
Revista Chilena de Obstetricia y Ginecología , 2005,
Abstract: Se analizaron 132 pacientes evaluando características epidemiológicas y clínicas, la correlación entre ecografía y anatomía patológica, la evolución y el uso laparoscópico en el tratamiento de masas anexiales. El diagnóstico se basó en la identificación ecográfica de una masa anexial. El rango de edad fue 16-66 a os. El dolor abdominal y pélvico estuvo presente en 34% de los casos; en 45% se diagnosticó la masa anexial por examen ecográfico de rutina. En 53% de las pacientes se realizó quistectomía y en 16% ooforectomía completa. En 78% la masa correspondió a ovario y en 22% a trompa. Para las masas de origen ovárico la frecuencia mayor correspondió a tumores epiteliales (22%), seguido por quistes endometriósicos con 18%. Hubo 3 complicaciones vasculares y cambio a vía abierta en 5 casos. Solo hubo 1 tumor borderline y como hallazgo un cáncer de cuello uterino. El objetivo de este trabajo es presentar la experiencia quirúrgica en el manejo laparoscópico de los tumores anexiales 132 patients were analyzed evaluating epidemiological and clinical characteristics, the interrelation between ultrasound scan and pathological anatomy, the evolution and the laparoscopic use for the treatment of adnexal masses. The diagnosis was based on the ultrasonic identification of an adnexal mass. The age range was between 16-66 years. The abdominal and pelvic pain was present in 34% of the cases; in 45 % it was diagnosed an adnexal mass by routine ultrasound examination. In 53% it was realized cystectomy and complete ooforectomy in 16%. In 78% the mass corresponded to ovary and in 22 % to the Fallopian tube. For the masses of ovarian origin the biggest frequency corresponded to epithelial tumors (22%), followed by endometriosis cysts in 18%. 3 vascular complications are described and a change to laparotomy way in 5 cases. Only 1 tumor borderline was found and 1 cervix cancer. The objective of this work is to show our surgical experience in the laparoscopic handling of the adnexal tumors
GEMELAR MONOAMNIOTICO: UNA RAREZA
José Lattus O.,Alejandra Catalán B.,Hugo Salvo F.,Fancy Gaete V.
Revista Chilena de Obstetricia y Ginecología , 2003,
Abstract: Se presenta un caso clínico de gestación gemelar monocorial, monoamniótica, la resolución del parto y breve revisión bibliográfica A case of monochorionic monoamniotic twins is presented; the birth and a review report of bibliography
PóLIPOS ENDOMETRIALES: MANEJO CON HISTEROSCOPIA QUIRúRGICA Y CORRELACIóN HISTOLóGICA
Catalán B,Alejandra; Corvalán A,Jaime; Pantoja C,Valeria; García A,Karen; Godoy V,María;
Revista chilena de obstetricia y ginecología , 2007, DOI: 10.4067/S0717-75262007000200009
Abstract: the surgical experience in 160 patients with echographic diagnostic of endometrial polyps, are analyzed. clinical and pathological characteristics are evaluated. the patient average age was 50 years old; variables were analyzed differentiating them in pre menopausal or post menopausal, according to the presence of symptoms. in all sub-groups the incidence was equally high for the endometrial polyps, followed in frequency by leiomyomas, endometrial hyperplasia and endometria proliferative among others. three cases of endometrial adenocarcinoma were found, all in the sub-group of the symptomatic post menopausal patients. the procedure was well tolerated, without complications. we emphasized the hysteroscopy procedure as the gold standard by its high sensitivity and specificity in the endometrial polyp diagnosis
MANEJO LAPAROSCóPICO DE MASAS ANEXIALES: EXPERIENCIA LOCAL
Catalán B.,Alejandra; Laiz R.,Domingo; Corvalán A.,Jaime; Masoli I.,Diego; Vásquez C.,Wladimir;
Revista chilena de obstetricia y ginecología , 2005, DOI: 10.4067/S0717-75262005000400005
Abstract: 132 patients were analyzed evaluating epidemiological and clinical characteristics, the interrelation between ultrasound scan and pathological anatomy, the evolution and the laparoscopic use for the treatment of adnexal masses. the diagnosis was based on the ultrasonic identification of an adnexal mass. the age range was between 16-66 years. the abdominal and pelvic pain was present in 34% of the cases; in 45 % it was diagnosed an adnexal mass by routine ultrasound examination. in 53% it was realized cystectomy and complete ooforectomy in 16%. in 78% the mass corresponded to ovary and in 22 % to the fallopian tube. for the masses of ovarian origin the biggest frequency corresponded to epithelial tumors (22%), followed by endometriosis cysts in 18%. 3 vascular complications are described and a change to laparotomy way in 5 cases. only 1 tumor borderline was found and 1 cervix cancer. the objective of this work is to show our surgical experience in the laparoscopic handling of the adnexal tumors
Marginal discrepancy and microleakage in crown-copings fabricated by three CAD/CAM systems: An in vitro study  [PDF]
Marcela Herrera, Alfonso Catalán, Maritza Flores, Alejandra Martínez
Open Journal of Stomatology (OJST) , 2012, DOI: 10.4236/ojst.2012.23030
Abstract: The purpose of this study was to evaluate and compare the microleakage and marginal discrepancy of ceramic crown-copings fabricated by three different CAD/CAM systems. Material and methods: Thirty extracted premolars were prepared for complete all-ceramic crowns with: total convergence 10-degree, 2 mm occlusal reduction, 4.5 mm height, 1.3 mm circular reduction and chamfer marginal preparation. They were divided into three groups and each group (n = 10) received a ceramic crown-coping fabricated by one of three CAD/CAM systems: Procera, KaVo Everest and Cerec inLab. The copings were cemented with Panavia F 2.0. After thermal cycling, the teeth were immersed in 2% basic fuchsine dye for 24 hours. Microleakage was scored using a five-point scale and evaluated under a stereomicroscope at ×18. Marginal discrepancies were assessed with scanning electronic microscope at ×150, with measurements at 50 different points. Data were subjected to a chisquare test, Kolmogorov-Smirnov test and using Rho Spearman’s correlation test (P < 0.05). Results: Cerec inLab CAD/CAM crown-copings showed significant microleakage compared to Procera and KaVo Everest (P = 0.031). No significant differences were observed between Procera and the KaVo Everest system (P > 0.05). No significant differences were found in marginal discrepancies for the Procera (62.58 ± 8.98 μm) and KaVo Everest systems (65.54 ± 18.56 μm), (P = 0.941). Significant differences were found for Cerec inLab (132.18 ± 27.75 μm) compared with Procera and KaVo Everest (P = 0.0001). No correlation between the marginal discrepancies and microleakage for the three CAD/CAM crown-copings systems. Conclusions: Cerec inLab CAD/CAM crown-copings showed significantly higher values for microleakage and marginal discrepancy in comparison with Procera and KaVo Everest CAD/CAM crown-copings.
GEMELAR MONOAMNIOTICO: UNA RAREZA
Lattus O.,José; Catalán B.,Alejandra; Salvo F.,Hugo; Gaete V.,Fancy; Ibá?ez M.,Carmen Gloria; Rossel T.,Felipe;
Revista chilena de obstetricia y ginecología , 2003, DOI: 10.4067/S0717-75262003000600011
Abstract: a case of monochorionic monoamniotic twins is presented; the birth and a review report of bibliography
ESTUDIO DE LA COPOLIMERIZACIóN POR INJERTO DE ACRILONITRILO EN FIBRA CELULOSICA SECUNDARIA
Catalán,R.; Neira,A.; Rivas,B. L.;
Boletín de la Sociedad Chilena de Química , 2002, DOI: 10.4067/S0366-16442002000100008
Abstract: graft copolymers of acrylonitrile on secondary cellulosic fiber were synthesized in aqueous medium by the fe+2-hydrogen peroxide system as initiator. grafting cellulosic xanthogenate were also prepared. the graft copolymers were characterized by elemental analysis, ft-ir spectroscopy, thermogravimetric analysis and scanning electron microscopy. the following parameters of copolymerization were studied: cellulose: acrylonitrile ratio, concentration of fe+2-h2o2, ph, temperature and time of reaction. their effects were also discussed. grafting percentages higher than 85% were obtained in the best condition of the reaction. the obtained fibrous products were coloured or white, with a compact association of fibers. these products showed higher thermal stability than that of the secondary cellulosic fiber
ESTUDIO DE LA COPOLIMERIZACIóN POR INJERTO DE ACRILONITRILO EN FIBRA CELULOSICA SECUNDARIA STUDY OF GRAFT COPOLYMERIZATION ON SECONDARY CELLULOSIC FIBER WITH ACRYLONITRILE
R. Catalán,A. Neira,B. L. Rivas
Boletín de la Sociedad Chilena de Química , 2002,
Abstract: Se sintetizaron copolímeros por injerto de acrilonitrilo en fibra celulósica secundaria, usando como iniciador el sistema redox: ion ferroso-peróxido de hidrógeno, en medio acuoso. También, se prepararon copolímeros vía xantación de celulosa. Los copolímeros se caracterizaron por análisis elemental, espectroscopía infrarroja, microscopía electrónica de barrido y termogravimetría. Los parámetros de la reacción de copolimerización que fueron investigados son: relación en masa de celulosa y acrilonitrilo; concentración de Fe+2-H2O2, pH, temperatura y tiempo de reacción. Se discuten sus efectos en el sistema estudiado. Los porcentajes de injerto superiores a 85%, se alcanzaron en las condiciones óptimas de la reacción de copolimerización. Los productos fibrosos obtenido fueron coloreados, otros blancos y con agrupación compacta de fibras, generando materiales de mayor estabilidad térmica que la celulosa de fibra secundaria Graft copolymers of acrylonitrile on secondary cellulosic fiber were synthesized in aqueous medium by the Fe+2-hydrogen peroxide system as initiator. Grafting cellulosic xanthogenate were also prepared. The graft copolymers were characterized by elemental analysis, FT-IR spectroscopy, thermogravimetric analysis and scanning electron microscopy. The following parameters of copolymerization were studied: cellulose: acrylonitrile ratio, concentration of Fe+2-H2O2, pH, temperature and time of reaction. Their effects were also discussed. Grafting percentages higher than 85% were obtained in the best condition of the reaction. The obtained fibrous products were coloured or white, with a compact association of fibers. These products showed higher thermal stability than that of the secondary cellulosic fiber
EVOLUCIóN URBANA Y SU INFLUENCIA EN LA EROSIóN COSTERA EN EL BALNEARIO PARQUE MAR CHIQUITA, ARGENTINA
Alejandra Merlotto,Germán R. Bértola
Papeles de Geografía , 2008,
Abstract: La erosión costera constituye un problema ambiental de gran complejidad e importancia debido a las implicancias socio-económicas que genera sobre las áreas afectadas. Es un fenómeno muy dinámico y cambiante, por lo tanto sus causas pueden variar en el tiempo y en el espacio dificultándose su detección, ya que su origen puede ser local o regional. En zonas urbanizadas, la erosión de las costas es causada por la combinación de factores tanto sociales como naturales. El Balneario Parque Mar Chiquita -Provincia de Buenos Aires, Argentina- ha manifestado un intenso proceso erosivo debido, entre otros, a factores antrópicos regionales. El objetivo de este trabajo es analizar la evolución urbana y la dinámica medanosa del área costera del balneario con la finalidad de determinar su influencia en la erosión costera del mismo. A partir de fotografías aéreas, se constata que la ocupación y densificación urbana y la fijación de los médanos con vegetación han jugado un papel importante en el retroceso de la línea de costa. Se reconocen dos zonas en el área con un comportamiento diferencial de la dinámica medanosa, el cual puede relacionarse con las tasas medias de erosión registradas.
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