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Search Results: 1 - 10 of 94372 matches for " I. Velázquez "
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Aproximación a la obra científica del Comandante médico Fidel Pagés Miravé
Velázquez Rivera,I.;
Sanidad Militar , 2011, DOI: 10.4321/S1887-85712011000300003
Abstract: a. faulconer in his book "foundations of anesthesiology", referring to pagés says: "there are little data on the life of this important spanish surgeon". this conclusive statement attached to unforgivable omissions to the figure of pagés by historians of anesthesia or surgery, and to serious errors in facts about his life or work, led us to make an approximation as accurate as possible, to the scientific work of the medical commander fidel pagés miravé. few figures have been the spanish who have made some interesting news to the world of anesthesia. but none so wronged and forgotten like pagés, a true pioneer of epidural anesthesia, that he would call metameric anesthesia in his article published in the month of march, 1921, in the spanish journal of surgery, founded by him. years later, in 1931, dogliotti, professor of surgery in modena published his experiences on the epidural, which he called segmental epidural anesthesia, ignoring the work published ten years earlier by pagés. dogliotti's work was quickly recognized, assuming all the merits of the paternity of the epidural technique, being pagés relegated to an unfair oblivion that this work is trying to repair. feeling the need to locate pagés on the environment in which he developed his scientific work, we try to realize a vision of the main surgical and anesthetic contributions of surgeons who were contemporaries with pagés. with special sake, we delve into the historical precedents of spinal or caudal anesthesia techniques, as well as pagés later descriptions on the lumbar approach of the epidural route. at the same time, we conducted a comparative analysis of the work of pagés on metameric anesthesia in relation to the current force that may have their comments, descriptions, indications and contraindications. the central idea of the work will focus on the recognition of pagés as a true promoter of the epidural approach with surgical aims. and to evaluate a work which, though short, may well be included amo
Respuesta de los autores Response by the authors
I. Velázquez Riverra
Revista de la Sociedad Espa?ola del Dolor , 2010,
Abstract:
Aproximación a la obra científica del Comandante médico Fidel Pagés Miravé Approach to the scientific work of medical Commander Fidel Pagés Miravé
I. Velázquez Rivera
Sanidad Militar , 2011,
Abstract: A. Faulconer en su libro "Foundations of Anesthesiology" refiriéndose a Pagés afirma: "No se encuentran apenas datos sobre la vida de este importante cirujano espa ol". Esta concluyente afirmación unida a imperdonables omisiones de la figura de Pagés por historiógrafos de la anestesia o de la cirugía, y a graves errores en datos sobre su vida u obra, nos movió a realizar una aproximación, lo más exacta posible, a la obra científica del Comandante Médico Fidel Pagés Miravé. Escasas han sido las figuras espa olas que hayan aportado alguna interesante novedad al mundo de la anestesia. Pero ninguna tan injustamente tratada y olvidada como la de Pagés, verdadero pionero de la anestesia epidural, que él denominaría Anestesia Metamérica en su artículo publicado en el mes de marzo de 1921 en la Revista Espa ola de Cirugía, por él fundada. A os después, en 1931, Dogliotti, Profesor de Cirugía de Modena publicó sus experiencias sobre la anestesia epidural, a la que llamó Anestesia Peridural Segmentaria, ignorando el trabajo de Pagés publicado diez a os antes. El trabajo de Dogliotti fue rápidamente reconocido, asumiendo todos los méritos de la paternidad de la técnica epidural, quedando Pagés relegado a un olvido injusto que con este trabajo tratamos de reparar. En la necesidad de ubicar a Pagés en el entorno en el que desarrolló su obra científica, tratamos de realizar una visión de las principales aportaciones quirúrgicas y anestésicas de aquellos cirujanos que fueron coetáneos con nuestro personaje. Con especial abundamiento, profundizamos en los precedentes históricos de las técnicas de anestesia intradural o caudal, así como las descripciones posteriores a Pagés sobre el abordaje lumbar de la vía epidural. A su vez realizamos un análisis comparativo del trabajo de Pagés sobre la anestesia metamérica, en relación con la actual vigencia que puedan tener sus observaciones, descripciones, indicaciones y contraindicaciones. La idea central del trabajo versará sobre el reconocimiento de Pagés como verdadero promotor del abordaje epidural con fines quirúrgicos. Así como valorar una obra que, aunque corta, bien pudiera incluirse entre los mejores cirujanos espa oles de principio de siglo. Nos centramos, para la recopilación de datos, en sus expedientes académicos (Zaragoza y Madrid), en su hoja de servicios como Médico Militar y en las publicaciones sobre Historia de la Anestesia, Historia de la Cirugía y de la Sanidad Militar. Para mejor conocer al Personaje hemos localizado a su familia y revisamos los diarios oficiales del Ministerio de la Guerra las colecciones c
From Coping with Stress to Positive Coping with Life: Theoretical Review and Application  [PDF]
Elías A. Góngora-Coronado, Iris I. Vásquez-Velázquez
Psychology (PSYCH) , 2018, DOI: 10.4236/psych.2018.915169
Abstract: This paper is a review and analysis of the theoretical evolution of the concept of coping with stress to a more positive way of coping, as well as an example of application. The main results of an integrated research in three phases about the nature and practice of a more positive coping with life are presented (Góngora-Coronado, 2010). The first phase is to explore its nature in a qualitative manner. A second phase is to study the relationship of direct-reappraisal coping (Góngora-Coronado, 2000; Reyes-Lagunes, 2011), with happiness, mindfulness and spirituality, which are positive variables, to explore their nature more accurately, and a third phase, is for the exercise and practice of a more positive coping, with an intervention program. The participants for each phase were: phase 1:50; phase 2:306; and phase 3:32. Relevant instruments, psychometrically valid in the context of culture, were applied. The results in each of the phases provide information about the nature of a more positive coping, as well as the benefits of its systematized practice. It concludes with the importance of linking theory with practice for a more positive coping and a happier life.
Trastornos del sue?o e incidencia de ansiedad y depresión en pacientes con dolor crónico no maligno tratados con opioides potentes
Velázquez,I.; Mu?oz,M.; Sánchez,M.; Zenner,A.; Velázquez,L.;
Revista de la Sociedad Espa?ola del Dolor , 2012,
Abstract: introduction: accompanying pain, other biologically important functions are present which are not always well recognized and which are usually called "co morbidities". one of them is sleep, although it has also been shown some correlation between the state of mood and nociception, being both states the most studied and considered as relevant in relation to chronic pain, anxiety and depression. objective: the main objective is to evaluate the quality of sleep in patients with chronic nonmalignant pain (cnmp) treated with potent opioids. as secondary objectives: to analyze the incidence of anxiety and depression in these patients and to compare the quality of sleep and incidence of anxiety-depression with different variables: type of opioid, gender, sex and type of pain. material and methods: we considered the study universe cnmp patients treated with the same strong opioid for at least three months and were seen at the pain management unit between september 2009 and march 2010. excluded were patients younger than 18 years, those who would not cooperate, diagnosed with fibromyalgia and those who were in psychiatric treatment. as an assessment tool of sleep we used the oviedo sleep questionnaire (cos) and in measuring the degree of anxiety-depression we used the test hospital anxiety and depression (had) on its overall assessment. statistical analysis for qualitative variables was performed using the pearson χ2. quantitative variables were compared with a student test. values with a p-value less than 0.05 were accepted as significant (95% confidence interval). we used the statistical package for windows spss.15. results: in the assessment of sleep disorders there were significant differences according to the type of opioid consumed, being the group treated with hydromorphone the one with the best results made in the three subscales tested: cos's subjective assessment, objective subscale of insomnia and those who consumed fewer drugs to sleep. we also found differences
Premedicación en anestesia pediátrica: citrato de fentanilo oral transmucoso frente a midazolam oral
Velázquez,I.; Mu?oz-Garrido,J.C.;
Revista de la Sociedad Espa?ola del Dolor , 2010,
Abstract: introduction: the aim of anaesthetic premedication is to reduce anxiety and stress prior to surgery. paediatric patients suffer even more anxiety due to fear of the unknown and the separation from parents. the need to find out a suitable way of administering premedication to paediatric patients without causing any more trauma is a challenge for the anaesthesiologist. objectives: the objective of the current study was to evaluate the efficacy, level of sedation and a way of accepting two different types of premedication for children: oral transmucosal fentanyl citrate (otfc) and oral midazolam dissolved in fruit juice. methods: in this study, 40 children who were going to be subjected to various types of surgery were randomised to receive otfc 10 μg/kg and midazolam 0.3 mg/kg 30 minutes before venipuncture. variables taken into account were: haemoglobin saturation from the beginning of premedication and inside the recovery room, way of accepting, level of sedation, child behaviour after separation from parents, venous puncture and anaesthetic induction, delay in wakening, need of post-surgical analgesia and appearance of secondary effects. results: results were compared using student?s t (p < 0.05) and there were significant differences in favour of the otfc group as far as the way of accepting a venous puncture was concerned. no differences in behaviour were observed after separation from parents and anaesthetic induction. there were no significant differences in haemoglobin saturation or secondary effects between both groups. conclusions: we believe that the use of otfc is safe, effective and a convenient way to premedicate a paediatric population, who will be undergoing a surgical procedure, with a reasonable degree of sedation which makes separation from their parents, venous catheterisation and anaesthetic induction easier.
Premedicación en anestesia pediátrica: citrato de fentanilo oral transmucoso frente a midazolam oral Premedication in paediatric anaesthesia
I. Velázquez,J.C. Mu?oz-Garrido
Revista de la Sociedad Espa?ola del Dolor , 2010,
Abstract: Introducción: La premedicación anestésica está destinada a reducir la ansiedad y la respuesta al estrés que supone el período anterior a la intervención quirúrgica. El temor a lo desconocido, al dolor y la separación de los padres son elementos que se a aden a la ansiedad perioperatoria en la población pediátrica. La necesidad de encontrar una vía de administración idónea en ni os que no a ada más sufrimientos a los ya existentes, es un reto para los anestesiólogos. Objetivo: Los objetivos del presente estudio eran valorar la eficacia, el grado de sedación y el modo de aceptación de 2 modalidades de premedicación para ni os: citrato de fentanilo oral transmucoso (CFOT) y midazolam oral disuelto en zumo de fruta. Material y método: Se estudiaron 2 grupos aleatorizados de 40 ni os que iban a someterse a cirugía de diversas especialidades. Las dosis administradas fueron de 10 μg/kg de CFOT y 0,3 mg/kg de midazolam, administrados 30 minutos antes de la punciσn venosa. Las variables consideradas fueron: saturaciσn de hemoglobina desde el inicio de la premedicaciσn y en la sala de despertar, modo de aceptaciσn, grado de sedaciσn, actitud del niρo al separarlo de los padres, ante la punción venosa y ante la inducción anestésica, retraso en el despertar, requerimiento de analgesia postoperatoria, aparición de efectos secundarios. Resultados: Los resultados se compararon utilizando la t de Student (p < 0,05), y se obtuvieron diferencias significativas en el grado de aceptación favorable al grupo de CFOT, así como la actitud del ni o en la canalización venosa. No hubo diferencias en la separación de los padres y en la inducción anestésica. No se presentaron secundarismos significativos en ningún grupo, ni se apreció tampoco desaturación importante de hemoglobina tras la administración de la premedicación. Conclusiones: Creemos que el CFOT se nos plantea como una administración de premedicación segura, eficaz y cómoda para población pediátrica, que vaya a someterse a intervención quirúrgica, con un adecuado grado de sedación que facilita la separación de los padres, la canalización venosa y la inducción anestésica. Introduction: The aim of anaesthetic premedication is to reduce anxiety and stress prior to surgery. Paediatric patients suffer even more anxiety due to fear of the unknown and the separation from parents. The need to find out a suitable way of administering premedication to paediatric patients without causing any more trauma is a challenge for the anaesthesiologist. Objectives: The objective of the current study was to evaluate the efficacy, level of se
Design Of An Aerodynamic Measurement System For Unmanned Aerial Vehicle Airfoils
L. Velázquez-Araque,J. No?ička
Journal of Systemics, Cybernetics and Informatics , 2012,
Abstract: This paper presents the design and validation of a measurement system for aerodynamic characteristics of unmanned aerial vehicles. An aerodynamic balance was designed in order to measure the lift, drag forces and pitching moment for different airfoils. During the design process, several aspects were analyzed in order to produce an efficient design, for instance the range of changes of the angle of attack with and a small increment and the versatility of being adapted to different type of airfoils, since it is a wire balance it was aligned and calibrated as well. Wind tunnel tests of a two dimensional NACA four digits family airfoil and four different modifications of this airfoil were performed to validate the aerodynamic measurement system. The modification of this airfoil was made in order to create a blowing outlet with the shape of a step on the suction surface. Therefore, four different locations along the cord line for this blowing outlet were analyzed. This analysis involved the aerodynamic performance which meant obtaining lift, drag and pitching moment coefficients curves as a function of the angle of attack experimentally for the situation where the engine of the aerial vehicle is turned off, called the no blowing condition, by means of wind tunnel tests. The experiments were performed in a closed circuit wind tunnel with an open test section. Finally, results of the wind tunnel tests were compared with numerical results obtained by means of computational fluid dynamics as well as with other experimental references and found to be in good agreement.
Theoretical and Numerical Analysis of the Mechanical Erosion in Steam Turbine Blades. Part II  [PDF]
F. Rueda Martínez, M. Toledo Velázquez, J. Abugaber Francis, A. A. Rueda Martínez, I. Carvajal Mariscal, J. A. Ortega Herrera, G. Polupan
Energy and Power Engineering (EPE) , 2011, DOI: 10.4236/epe.2011.33030
Abstract: In the low pressure section of the steam turbines the damages are pronounced becoming remarkable in all the stages, since the generation of water liquid microparticles implies the impact on the blades having majors problems of erosion in the last stages by the increase of the humidity. In the first part of this work, the calculation presented of the transonic velocity field for the stream frictionless and the drops in the flow line, on the basis of the frictionless, two-dimensional, stationary, transonic and homogenous flow, give an approximate movement of the droplets and its accumulation on the stator blades, flowing through the steam. In order to understand the causes that originate the erosion on the blades of the last stages in low pressure section of steam turbines, the previous procedure is developed in a code in Fortran and the obtained results of velocity distribution in the output of blades that have flow conditions of wet steam are presented.
Use of Rosmarinus officinalis as Green Corrosion Inhibitor for Carbon Steel in Acid Medium  [PDF]
M. A. Velázquez-González, J. G. Gonzalez-Rodriguez, M. G. Valladares-Cisneros, I. A. Hermoso-Diaz
American Journal of Analytical Chemistry (AJAC) , 2014, DOI: 10.4236/ajac.2014.52009
Abstract:

The use of Rosmarinus officinalis as a corrosion inhibitor for 1018 carbon steel in 0.5 M H2SO4 has been evaluated by using weight loss, potentiodynamic polarization curves and electrochemical impedance spectroscopy techniques at 25°. Inhibitor concentrations were included within the range between 0 and 1000 ppm C using three extract solvents, namely acetone, hexane and methanol. Results have shown that Rosmarinus officinalis is a good corrosion inhibitor with its efficiency increasing with the concentration. The best efficiency was obtained with the hexanic extract. The passivating film properties of the steel were improved by the presence of flavonoids in the extract.

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