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An Overview on the Installation of Obtaining Aluminum Powder Instalación experimental para la obtención de polvos de aluminio
Lázaro Suárez Lisca,Carlos René Gómez Pérez,Lázaro Pino Rivero
Revista Cubana de Ingeniería , 2011, DOI: 10.1234/rci.v2i2.50
Abstract: This paper discusses the instrumentation required for obtaining metallic powder by combining the thermal and mechanical impact between the liquid and other fluid. A brief review of existing methods for the production of aluminum powder is made, and then a calculation methodology for the design and dimensioning of an atomization tower is elaborated, which will be used to obtain the diameter of particles ranging from 100 to 300 micrometer in an argon atmosphere of a discontinuous process. In the designed atomization tower the liquid metal is broken up by the action of a flow of pressurized gas supplied from a blower to spray nozzles, and then the liquid metal enters the granulation chamber impelled by a piston. The total cost of the installation is determined and the general aspects on how to operate and maintain the facility expounded. El trabajo aborda el tema de la instrumentación necesaria para la obtención de polvos metálicos mediante la combinación del choque térmico y el impacto mecánico entre el líquido y otro fluido. Se hace una breve valoración sobre los métodos existentes para la obtención de polvos de aluminio, se elabora una metodología de cálculo para el dise o y dimensionamiento de una torre de atomización, la cual será utilizada para obtener diámetros de partículas desde 100 hasta 300 μm, en una atmósfera de argón, en un proceso discontinuo y para fines experimentales. En la torre de atomización dise ada el metal líquido es fragmentado por la acción de un flujo de gas a presión suministrado desde un soplador hasta las boquillas de atomización; el metal líquido entra a la cámara de granulación impulsado por un pistón. Se determina el costo total de la instalación y se exponen los aspectos generales sobre la operación y mantenimiento de la instalación.
Hemodilución normovolémica intencional alternativa práctica para la transfusión homóloga de sangre en cirugía general y especializada
Fernández Suárez,Lázaro Manuel; Leal Monjiotti,Zoraida;
Revista Cubana de Cirug?-a , 2000,
Abstract: intentional normovolemic hemodilution is a useful technique reducing the transfusion requirements by 15 to 40%. it represents a saving of homologous blood, creates a reserve of antigen blood, reduces the number of hematids lost in a surgical haemorrhage, improves blood flow and lower blood viscosity to increase hystic oxigenation and decrease the possibilities of pulmonar thromboembolism among other benefits. a retrospective study of 50 supposedly healthy patients with catetory i-ii of asa (american society of anesthesia) was made on the use of normovolemic dilution. according to a nomogram, blood extraction was made to take hematocrit to 0.25 before surgery, a value that was confirmed with microhematocrit technique and intraoperative controlled. no abnormal fluctuation of coagulation test values were observed. there was an unquestionable saving of homologous blood with the corresponding benefit for the patient
Hemodilución normovolémica intencional alternativa práctica para la transfusión homóloga de sangre en cirugía general y especializada
Lázaro Manuel Fernández Suárez,Zoraida Leal Monjiotti
Revista Cubana de Cirugía , 2000,
Abstract: La hemodilución normovolémica intencional es una técnica útil que reduce los requerimientos transfusionales entre el 15 y el 40 %. Representa un ahorro de sangre homóloga, crea una reserva de sangre autógena, reduce el número de hematíes perdidos en la hemorragia quirúrgica, además mejora el flujo sanguíneo y disminuye la viscosidad de la sangre, para aumentar la oxigenación hística y reducir la posibilidad de tromboembolismo pulmonar entre otros beneficios. Se realizó un estudio prospectivo con 50 pacientes supuestamente sanos con la categoría I-II de la A.S.A. (American Society of Anesthesia) sobre el uso de la hemodilución normovolémica. Se efectuó la extracción según nomograma para llevar el hematócrito a 0,25 preoperatoriamente, corroborado por la técnica de microhematócrito y controlado en el transoperatorio; no se apreció movimiento anormal en los valores del coagulograma. Se apreció un incuestionable ahorro de sangre homóloga con el consiguiente beneficio para el paciente Intentional normovolemic hemodilution is a useful technique reducing the transfusion requirements by 15 to 40%. It represents a saving of homologous blood, creates a reserve of antigen blood, reduces the number of hematids lost in a surgical haemorrhage, improves blood flow and lower blood viscosity to increase hystic oxigenation and decrease the possibilities of pulmonar thromboembolism among other benefits. A retrospective study of 50 supposedly healthy patients with catetory I-II of ASA (American Society of Anesthesia) was made on the use of normovolemic dilution. According to a nomogram, blood extraction was made to take hematocrit to 0.25 before surgery, a value that was confirmed with microhematocrit technique and intraoperative controlled. No abnormal fluctuation of coagulation test values were observed. There was an unquestionable saving of homologous blood with the corresponding benefit for the patient
Escleroplastia meridional: A propósito de un caso en 1999
Machado Fernández,Enrique J.; Vigoa Aranguren,Lázaro; Pérez Suárez,Raúl;
Revista Cubana de Oftalmolog?-a , 2000,
Abstract: in present paper, authors present a recent case of rejection to allograft used to meridional scleroplasty. festures of clinical picture and its treatment are related. furthermore, we express statistical data based on considerations and anatomic-pathologic findings supporting suspension of practice of this technique in center of microsurgery of eye.
Escleroplastia meridional: A propósito de un caso en 1999 Meridional scleroplasty: With regard to a case in 1999
Enrique J. Machado Fernández,Lázaro Vigoa Aranguren,Raúlrez Suárez
Revista Cubana de Oftalmolog?-a , 2000,
Abstract: En este artículo se presenta un caso reciente de rechazo al aloplante utilizado para escleroplastia meridional. Se refieren las características del cuadro clínico presentado y su tratamiento. Además, se expresan consideraciones basadas en datos estadísticos y hallazgos anatomopatológicos que fundamentan la suspensión de la práctica de esta técnica en el Centro de Microcirugía Ocular. In present paper, authors present a recent case of rejection to allograft used to meridional scleroplasty. Festures of clinical picture and its treatment are related. Furthermore, we express statistical data based on considerations and anatomic-pathologic findings supporting suspension of practice of this technique in Center of Microsurgery of Eye.
Sistema organizacional para la ense?anza de Tecnología de la Salud: Perfil de Optometría y óptica. Misión Barrio Adentro. Venezuela
Hernández García,Luis; Díaz Hernández,Lázaro; Morales Suárez,Ileana;
Educaci?3n M??dica Superior , 2007,
Abstract: objective: to make a proposal of an organizational system for the implementation of the program of health technology licentiate in the profile of optometry and optics, giving an answer to the need of the massive training of the health cooperators linked with this specialty in the mission into the neighbourhood in the bolivarian republic of venezuela, where they are distributed in 459 points in the 24 states of the countries. development: a bibliographical review on the topic was made. the setting where the training activity will take place was characterized by interviewing experts and by using an observation guide. the teaching figures responsible for the conduction of the program were defined and the main functions to be developed, as well as their interrelations during the formative process, were identified. tutors, professors and teaching activists were proposed as teaching figures, supported by the structure of the cuban brigade in the mission into the neighbourhood program and by the active participation of the youth leaders in every territory. conclusions: an organizational system proposal was made and the teaching figures guaranteeing the process were identified
Dacriocistorrinostomía externa: Análisis de los resultados en 5 a?os
Martínez Suárez,Nereyda; Rodríguez Méndez,Noelio; Vigoa Arangúren,Lázaro;
Revista Cubana de Oftalmolog?-a , 2002,
Abstract: a retrospective descriptive study of 355 patients carriers of chronic dacryocystitis that underwent surgery by the external dacryocystorhinostomy technique in a period of 5 years was conducted. . female white patients between 60 and 70 and with unspecific chronic ethiology prevailed. the complications were only present in 8 % of the cases and it was obtained 95 % of satisfactory results with a follow-up period of one year. the anatomopathological findings of fragments of bones, lacrimal sac and nasal pitituary obtained during surgery are shown
Asistencia respiratoria. Consideraciones a tener en cuenta
Gutiérrez Noyola,Anarelys; Druyet Castillo,Dalilis; Ruiz Suárez,Lázaro Oscar;
Revista Cubana de Medicina General Integral , 2003,
Abstract: a bibliographic review of the most important elements of acute respiratory failure was made. a synthesis of the principles on which the management of these patients is supported was carried out. reference was made to oxygen therapy, the humidification of the inhaled air, the administration of aerosol drugs and the aspiration of the airways. the ways and methods to perform these maneuvers are dealt with.
Sedación y analgesia en urgencias pediátricas
Druyet Castillo,Dalilis; Gutiérrez Noyola,Anarelis; Ruiz Suárez,Lázaro Oscar;
Revista Cubana de Medicina General Integral , 2003,
Abstract: pain is the most frequent symptom of a disease. roughly half of patients goes to the doctor basically because they suffer pain that generates a feeling of anguish both in the patient and the relatives. in emergency services, specially in pediatrics, the way of behaving in the face of pain has revolutionized in the course of the last 10 to 15 years. practice and mentality have changed and at present, child′s pain is taken into account and regularly treated in the right way. despite this, there are still a number of myths in relation to collateral responses. some people assure that younger infants have an immature nervous system and they do no feel pain in the same way as others; they consider that pain can not be measured by its subjective characteristics, and there are also people who think that children are at risk of becoming opioid addicts when prescribed. all these assertions are incorrect and complicated the management of the child suffering pain. this article describes the pharmacological and non-pharmacological methods of pain treatment and presents the behavioral strategies to face some of its specific aspects.
Dacriocistorrinostomía externa: Análisis de los resultados en 5 a os External dacryocystorhinostomy: Analysis of the results in 5 years
Nereyda Martínez Suárez,Noelio Rodríguez Méndez,Lázaro Vigoa Arangúren
Revista Cubana de Oftalmolog?-a , 2002,
Abstract: Se realizó un estudio retrospectivo descriptivo de 335 pacientes portadores de dacriocistitis crónica, que fueron intervenidos quirúrgicamente con la técnica de dacriocistorrinostomía externa en un período de 5 a os, predominaron los pacientes con edades correspondientes a la sexta década de la vida; del sexo femenino, raza blanca y la etiología crónica inespecífica; las complicaciones se presentaron solamente en el 8 % de los casos y se obtuvo un 95 % de resultados satisfactorios con un período de seguimiento de un a o. Se muestran los hallazgos anatomopatológicos de fragmentos de hueso, saco lagrimal y pituitaria nasal obtenidos durante la cirugía A retrospective descriptive study of 355 patients carriers of chronic dacryocystitis that underwent surgery by the external dacryocystorhinostomy technique in a period of 5 years was conducted. . Female white patients between 60 and 70 and with unspecific chronic ethiology prevailed. The complications were only present in 8 % of the cases and it was obtained 95 % of satisfactory results with a follow-up period of one year. The anatomopathological findings of fragments of bones, lacrimal sac and nasal pitituary obtained during surgery are shown
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