48 research outputs found

    Nuevos desarrollos y métodos para sistemas de navegación

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    Se reseñan los siguientes desarrollos recientes para sistemas de navegación integrada aplicados a vehículos espaciales, a) un método de generación de trayectorias sintéticas, actualmente usado por la CONAE, para evaluar sistemas de navegación previo al vuelo, b) un algoritmo de navegación inercial especialmente adaptado a vehículos de alta velocidad y c) un nuevo método de navegación integrada basado en la teoría de observadores no lineales que permite establecer a priori condiciones de convergencia en función de las incertidumbres del problema. Los métodos y algoritmos propuestos son demostrados en simulación para un inyector satelital similar a al que pondrá en órbita el satélite SAC-D y para la carga útil de un experimento de la CONAE de navegación y control realizado a bordo del cohete brasileño VS 30 lanzado en Diciembre de 2007.Facultad de Ingenierí

    Navegación integrada de un cohete suborbital

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    Partiendo de los datos almacenados durante un vuelo suborbital de un cohete sonda VS30 se analiza, en modo post-procesado, el desempeño del sistema de navegación integrada INS-GPS a bordo del mismo. Si bien la saturación del giróscopo axial durante el vuelo impidió parcialmente medir la velocidad de espinado del vehículo, dato crucial para el cálculo de su actitud, gracias a que los acelerómetros estaban separados del eje de rotación del vehículo, estos registraron la aceleración centrípeta. Con base en ésta información, el sistema de navegación integrada aquí propuesto permite estimar la actitud completa durante todo el período de tiempo bajo estudio. Se presentan las bases del método y se analizan los resultados.Facultad de Ingenierí

    Why Are Outcomes Different for Registry Patients Enrolled Prospectively and Retrospectively? Insights from the Global Anticoagulant Registry in the FIELD-Atrial Fibrillation (GARFIELD-AF).

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    Background: Retrospective and prospective observational studies are designed to reflect real-world evidence on clinical practice, but can yield conflicting results. The GARFIELD-AF Registry includes both methods of enrolment and allows analysis of differences in patient characteristics and outcomes that may result. Methods and Results: Patients with atrial fibrillation (AF) and ≥1 risk factor for stroke at diagnosis of AF were recruited either retrospectively (n = 5069) or prospectively (n = 5501) from 19 countries and then followed prospectively. The retrospectively enrolled cohort comprised patients with established AF (for a least 6, and up to 24 months before enrolment), who were identified retrospectively (and baseline and partial follow-up data were collected from the emedical records) and then followed prospectively between 0-18 months (such that the total time of follow-up was 24 months; data collection Dec-2009 and Oct-2010). In the prospectively enrolled cohort, patients with newly diagnosed AF (≤6 weeks after diagnosis) were recruited between Mar-2010 and Oct-2011 and were followed for 24 months after enrolment. Differences between the cohorts were observed in clinical characteristics, including type of AF, stroke prevention strategies, and event rates. More patients in the retrospectively identified cohort received vitamin K antagonists (62.1% vs. 53.2%) and fewer received non-vitamin K oral anticoagulants (1.8% vs . 4.2%). All-cause mortality rates per 100 person-years during the prospective follow-up (starting the first study visit up to 1 year) were significantly lower in the retrospective than prospectively identified cohort (3.04 [95% CI 2.51 to 3.67] vs . 4.05 [95% CI 3.53 to 4.63]; p = 0.016). Conclusions: Interpretations of data from registries that aim to evaluate the characteristics and outcomes of patients with AF must take account of differences in registry design and the impact of recall bias and survivorship bias that is incurred with retrospective enrolment. Clinical Trial Registration: - URL: http://www.clinicaltrials.gov . Unique identifier for GARFIELD-AF (NCT01090362)

    Risk profiles and one-year outcomes of patients with newly diagnosed atrial fibrillation in India: Insights from the GARFIELD-AF Registry.

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    BACKGROUND: The Global Anticoagulant Registry in the FIELD-Atrial Fibrillation (GARFIELD-AF) is an ongoing prospective noninterventional registry, which is providing important information on the baseline characteristics, treatment patterns, and 1-year outcomes in patients with newly diagnosed non-valvular atrial fibrillation (NVAF). This report describes data from Indian patients recruited in this registry. METHODS AND RESULTS: A total of 52,014 patients with newly diagnosed AF were enrolled globally; of these, 1388 patients were recruited from 26 sites within India (2012-2016). In India, the mean age was 65.8 years at diagnosis of NVAF. Hypertension was the most prevalent risk factor for AF, present in 68.5% of patients from India and in 76.3% of patients globally (P < 0.001). Diabetes and coronary artery disease (CAD) were prevalent in 36.2% and 28.1% of patients as compared with global prevalence of 22.2% and 21.6%, respectively (P < 0.001 for both). Antiplatelet therapy was the most common antithrombotic treatment in India. With increasing stroke risk, however, patients were more likely to receive oral anticoagulant therapy [mainly vitamin K antagonist (VKA)], but average international normalized ratio (INR) was lower among Indian patients [median INR value 1.6 (interquartile range {IQR}: 1.3-2.3) versus 2.3 (IQR 1.8-2.8) (P < 0.001)]. Compared with other countries, patients from India had markedly higher rates of all-cause mortality [7.68 per 100 person-years (95% confidence interval 6.32-9.35) vs 4.34 (4.16-4.53), P < 0.0001], while rates of stroke/systemic embolism and major bleeding were lower after 1 year of follow-up. CONCLUSION: Compared to previously published registries from India, the GARFIELD-AF registry describes clinical profiles and outcomes in Indian patients with AF of a different etiology. The registry data show that compared to the rest of the world, Indian AF patients are younger in age and have more diabetes and CAD. Patients with a higher stroke risk are more likely to receive anticoagulation therapy with VKA but are underdosed compared with the global average in the GARFIELD-AF. CLINICAL TRIAL REGISTRATION-URL: http://www.clinicaltrials.gov. Unique identifier: NCT01090362

    Modelos de intervención. Informática aplicada

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    Se presentan diferentes modelos de orientación escolar llevados a cabo por los Equipos Psicopedagógicos cuya finalidad es mejorar la calidad educativa y presentar una escuela integradora para todos. Consta de dos partes, la primera trata del modelo de intervención en el sector y en los centros educativos, en el cual se incluyen dos Anexos donde se desarrollan los programas realizados y se presenta un modelo de programación y temporalización de los programas en un centro de integración y en un centro ordinario con aula de educación especial. También trata del diseño de un modelo de intervención en la institución escolar y de la intervención de los equipos en el apoyo educativo a la familia. La segunda parte presenta un proyecto de trabajo sobre informática aplicada a equipos otro sobre el posible uso del ordenador en la realización de informes individuales y se incluyen además aplicaciones del ordenador a la orientación escolar.MadridBiblioteca de Educación del Ministerio de Educación, Cultura y Deporte; Calle San Agustín 5 -3 Planta; 28014 Madrid; Tel. +34917748000; [email protected]

    Outpatient parenteral antibiotic treatment for infective endocarditis: a prospective cohort study from the GAMES cohort

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    For the Spanish Collaboration on Endocarditis-Grupo de Apoyo al Manejo de la Endocarditis Infecciosa en España (GAMES) investigators: Hospital Costa del Sol, Marbella: Fernando Fernández Sánchez, Mariam Noureddine, Gabriel Rosas, Javier de la Torre Lima. Hospital Universitario de Cruces, (Bilbao): Roberto Blanco, María Victoria Boado, Marta Campaña Lázaro, Alejandro Crespo, Josune Goikoetxea, José Ramón Iruretagoyena, Josu Irurzun Zuazabal, Leire López-Soria, Miguel Montejo, Javier Nieto, David Rodrigo, Regino Rodríguez, Yolanda Vitoria, Roberto Voces. Hospital Universitario Virgen de la Victoria, Málaga: María (Mª) Victoria García López, Radka Ivanova Georgieva, Guillermo Ojeda, Isabel Rodríguez Bailón, Josefa Ruiz Morales. Hospital Universitario Donostia-Policlínica Gipuzkoa, San Sebastián: Ana María Cuende, Tomás Echeverría, Ana Fuerte, Eduardo Gaminde, Miguel Ángel Goenaga, Pedro Idígoras, José Antonio Iribarren, Alberto Izaguirre Yarza, Xabier Kortajarena Urkola, Carlos Reviejo. Hospital General Universitario de Alicante, Alicante: Rafael Carrasco, Vicente Climent, Patricio Llamas, Esperanza Merino, Joaquín Plazas, Sergio Reus. Complejo Hospitalario Universitario A Coruña, A Coruña: Nemesio Álvarez, José María Bravo-Ferrer, Laura Castelo, José Cuenca, Pedro Llinares, Enrique Miguez Rey, María Rodríguez Mayo, Efrén Sánchez, Dolores Sousa Regueiro. Complejo Hospitalario Universitario de Huelva, Huelva: Francisco Javier Martínez. Hospital Universitario de Canarias, Canarias: Mª del Mar Alonso, Beatriz Castro, Dácil García Rosado, Mª del Carmen Durán, Mª Antonia Miguel Gómez, Juan Lacalzada, Ibrahim Nassar. Hospital Regional Universitario de Málaga, Málaga: Antonio Plata Ciezar, José Mª Reguera Iglesias. Hospital Universitario Central Asturias, Oviedo: Víctor Asensi Álvarez, Carlos Costas, Jesús de la Hera, Jonnathan Fernández Suárez, Lisardo Iglesias Fraile, Víctor León Arguero, José López Menéndez, Pilar Mencia Bajo, Carlos Morales, Alfonso Moreno Torrico, Carmen Palomo, Begoña Paya Martínez, Ángeles Rodríguez Esteban, Raquel Rodríguez García, Mauricio Telenti Asensio. Hospital Clínic-IDIBAPS, Universidad de Barcelona, Barcelona: Manuel Almela, Juan Ambrosioni, Manuel Azqueta, Mercè Brunet, Marta Bodro, Ramón Cartañá, Carlos Falces, Guillermina Fita, David Fuster, Cristina García de la Mària, Laura García-Valls, Marta Hernández-Meneses, Jaume Llopis Pérez, Francesc Marco, José M. Miró, Asunción Moreno, David Nicolás, Salvador Ninot, Eduardo Quintana, Carlos Paré, Daniel Pereda, Juan M. Pericás, José L. Pomar, José Ramírez, Irene Rovira, Elena Sandoval, Marta Sala, Marta Sitges, Dolors Soy, Adrián Téllez, José M. Tolosana, Bárbara Vidal, Jordi Vila. Hospital General Universitario Gregorio Marañón, Madrid: Iván Adán, Javier Bermejo, Emilio Bouza, Daniel Celemín, Gregorio Cuerpo Caballero, Antonia Delgado Montero, Ana Fernández Cruz, Ana García Mansilla, Mª Eugenia García Leoni, Víctor González Ramallo, Martha Kestler Hernández, Amaia Mari Hualde, Mercedes Marín, Manuel Martínez-Sellés, Mª Cruz Menárguez, Patricia Muñoz, Cristina Rincón, Hugo Rodríguez-Abella, Marta Rodríguez-Créixems, Blanca Pinilla, Ángel Pinto, Maricela Valerio, Pilar Vázquez, Eduardo Verde Moreno. Hospital Universitario La Paz, Madrid: Isabel Antorrena, Belén Loeches, Alejandro Martín Quirós, Mar Moreno, Ulises Ramírez, Verónica Rial Bastón, María Romero, Araceli Saldaña. Hospital Universitario Marqués de Valdecilla, Santander: Jesús Agüero Balbín, Carlos Armiñanzas Castillo, Ana Arnaiz, Francisco Arnaiz de las Revillas, Manuel Cobo Belaustegui, María Carmen Fariñas, Concepción Fariñas-Álvarez, Rubén Gómez Izquierdo, Iván García, Claudia González Rico, Manuel Gutiérrez-Cuadra, José Gutiérrez Díez, Marcos Pajarón, José Antonio Parra, Ramón Teira, Jesús Zarauza. Hospital Universitario Puerta de Hierro, Madrid: Fernando Domínguez, Pablo García Pavía, Jesús González, Beatriz Orden, Antonio Ramos. Hospital Universitario Ramón y Cajal, (Madrid): Tomasa Centella, José Manuel Hermida, José Luis Moya, Pilar Martín-Dávila, Enrique Navas, Enrique Oliva, Alejandro del Río, Jorge Rodríguez-Roda Stuart, Soledad Ruiz Rodríguez. Hospital Universitario Virgen de las Nieves, Granada: Carmen Hidalgo Tenorio. Hospital Universitario Virgen Macarena, Sevilla: Manuel Almendro Delia, Omar Araji, José Miguel Barquero, Román Calvo Jambrina, Marina de Cueto, Juan Gálvez Acebal, Irene Méndez, Isabel Morales, Luis Eduardo López-Cortés. Hospital Universitario Virgen del Rocío, Sevilla: Arístides de Alarcón, Emilio García, Juan Luis Haro, José Antonio Lepe, Francisco López, Rafael Luque. Hospital San Pedro, Logroño: Luis Javier Alonso, Pedro Azcárate, José Manuel Azcona Gutiérrez, José Ramón Blanco, Lara García-Álvarez, José Antonio Oteo, Mercedes Sanz. Hospital de la Santa Creu i Sant Pau, Barcelona: Natividad de Benito, Mercé Gurguí, Cristina Pacho, Roser Pericas, Guillem Pons. Complejo Hospitalario Universitario de Santiago de Compostela, A Coruña: M. Álvarez, A. L. Fernández, Amparo Martínez, A. Prieto, Benito Regueiro, E. Tijeira, Marino Vega. Hospital Santiago Apóstol, Vitoria: Andrés Canut Blasco, José Cordo Mollar, Juan Carlos Gainzarain Arana, Oscar García Uriarte, Alejandro Martín López, Zuriñe Ortiz de Zárate, José Antonio Urturi Matos. Hospital SAS Línea de la Concepción, Cádiz: Gloria García Domínguez, Antonio Sánchez-Porto. Hospital Clínico Universitario Virgen de la Arrixaca, Murcia: José Mª Arribas Leal, Elisa García Vázquez, Alicia Hernández Torres, Ana Blázquez, Gonzalo de la Morena Valenzuela. Hospital de Txagorritxu, Vitoria: Ángel Alonso, Javier Aramburu, Felicitas Elena Calvo, Anai Moreno Rodríguez, Paola Tarabini-Castellani. Hospital Virgen de la Salud, Toledo: Eva Heredero Gálvez, Carolina Maicas Bellido, José Largo Pau, Mª Antonia Sepúlveda, Pilar Toledano Sierra, Sadaf Zafar Iqbal-Mirza. Hospital Rafael Méndez, Lorca-Murcia: Eva Cascales Alcolea, Pilar Egea Serrano, José Joaquín Hernández Roca, Ivan Keituqwa Yañez, Ana Peláez Ballesta, Víctor Soriano. Hospital Universitario San Cecilio, Granada: Eduardo Moreno Escobar, Alejandro Peña Monje, Valme Sánchez Cabrera, David Vinuesa García. Hospital Son Llátzer, Palma de Mallorca: María Arrizabalaga Asenjo, Carmen Cifuentes Luna, Juana Núñez Morcillo, Mª Cruz Pérez Seco, Aroa Villoslada Gelabert. Hospital Universitario Miguel Servet, Zaragoza: Carmen Aured Guallar, Nuria Fernández Abad, Pilar García Mangas, Marta Matamala Adell, Mª Pilar Palacián Ruiz, Juan Carlos Porres. Hospital General Universitario Santa Lucía, Cartagena: Begoña Alcaraz Vidal, Nazaret Cobos Trigueros, María Jesús Del Amor Espín, José Antonio Giner Caro, Roberto Jiménez Sánchez, Amaya Jimeno Almazán, Alejandro Ortín Freire, Monserrat Viqueira González. Hospital Universitario Son Espases, Palma de Mallorca: Pere Pericás Ramis, Mª Ángels Ribas Blanco, Enrique Ruiz de Gopegui Bordes, Laura Vidal Bonet. Complejo Hospitalario Universitario de Albacete, Albacete: Mª Carmen Bellón Munera, Elena Escribano Garaizabal, Antonia Tercero Martínez, Juan Carlos Segura Luque.[Background] Outpatient parenteral antibiotic treatment (OPAT) has proven efficacious for treating infective endocarditis (IE). However, the 2001 Infectious Diseases Society of America (IDSA) criteria for OPAT in IE are very restrictive. We aimed to compare the outcomes of OPAT with those of hospital-based antibiotic treatment (HBAT). [Methods] Retrospective analysis of data from a multicenter, prospective cohort study of 2000 consecutive IE patients in 25 Spanish hospitals (2008–2012) was performed. [Results] A total of 429 patients (21.5%) received OPAT, and only 21.7% fulfilled IDSA criteria. Males accounted for 70.5%, median age was 68 years (interquartile range [IQR], 56–76), and 57% had native-valve IE. The most frequent causal microorganisms were viridans group streptococci (18.6%), Staphylococcus aureus (15.6%), and coagulase-negative staphylococci (14.5%). Median length of antibiotic treatment was 42 days (IQR, 32–54), and 44% of patients underwent cardiac surgery. One-year mortality was 8% (42% for HBAT; P < .001), 1.4% of patients relapsed, and 10.9% were readmitted during the first 3 months after discharge (no significant differences compared with HBAT). Charlson score (odds ratio [OR], 1.21; 95% confidence interval [CI], 1.04–1.42; P = .01) and cardiac surgery (OR, 0.24; 95% CI, .09–.63; P = .04) were associated with 1-year mortality, whereas aortic valve involvement (OR, 0.47; 95% CI, .22–.98; P = .007) was the only predictor of 1-year readmission. Failing to fulfill IDSA criteria was not a risk factor for mortality or readmission. [Conclusions] OPAT provided excellent results despite the use of broader criteria than those recommended by IDSA. OPAT criteria should therefore be expanded.This work was supported by the Ministerio de Economia and Competitividad (Madrid, Spain) (FIS NCT00871104, Instituto de Salud Carlos III). J. M. P. received a “Rio Hortega” research grant from Instituto de Salud Carlos III and the Ministerio de Economia and Competitividad (Madrid, Spain) and the European Society for Clinical Microbiology and Infectious Diseases and Federation of European Microbiological Societies Research Fellowship 2016. Instituto de Salud Carlos III, Ministerio de Economía y Competitividad (Madrid, Spain) provided J. M. M. with a personal intensification research grant (INT15/00168) during 2016 and a personal 80:20 research grant from the Institut d’Investigacions Biomèdiques Pi i Sunyer for the period 2017–2019
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