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Sample records for aguda vaciamiento radical

  1. Vaciamiento gástrico y diabetes mellitus tipo 2

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    Camilo Andrés Quintero-Cadavid

    2015-04-01

    Full Text Available El adecuado control de la diabetes mellitus tiene una gran importancia desde muchos puntos de vista. En los últimos años, se ha destacado el impacto que tienen los niveles de la glucemia postprandial sobre el manejo y las complicaciones de esta enfermedad. Controlar la hiperglucemia postprandial y, por lo tanto, su participación en el deterioro clínico de los pacientes con diabetes puede conseguirse retardando el vaciamiento gástrico y estimulando el efecto incretina, los cuales se pueden promover utilizando los análogos del péptido similar al glucagón tipo 1 (GLP-1. En este artículo se revisa el concepto del efecto incretina y la utilidad de los análogos GLP-1 en el control de la glicemia en los pacientes con diabetes mellitus tipo 2.

  2. Apendicitis Aguda

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    Jorge Fallas González

    2012-03-01

    Full Text Available La apendicitis aguda, descrita desde 1886, es la emergencia quirúrgica más común. Tiene su mayor incidencia durante la adultez joven y su menor incidencia en niños y adultos mayores. Su diagnóstico se basa en una historia clínica completa, un examen físico bien orientado y en una adecuada interpretación de los exámenes de laboratorio y gabinete. A pesar de ser una entidad de resolución quirúrgica, su tratamiento engloba diferentes aspectos médicosAcute appendicitis, described since 1886, is the most common surgical emergency. It has its highest incidence during early adulthood, and its lowest incidence in infants and elders. The base of the diagnosis is a complete medical history, an oriented physical exam and an appropriate interpretation of the laboratory and complementary exams. Even though its resolution is a surgical procedure, its treatment involves different medical aspects

  3. Estandarización de valores de vaciamiento gástrico en sujetos normales por estudio gammagráfico en Cali.

    OpenAIRE

    Adriana Rengifo; Eduardo Lima; Gustavo Mariño; Alfredo Rengifo; José Humberto Arango; Alberto Alzate; Fernando Tuffi García; Martha Susana Forero; Matilde De Bernal; Gloria Gamboa

    2009-01-01

    Se presenta una serie de 30 personas normales donde se evaluaron los tiempos de vaciamiento gástrico, por estudio gammagráfico. El objetivo del estudio fue conocer el rango de normalidad, para el tiempo de vaciamiento gástrico en sujetos asintomáticos entre 18 y 55 años. Hasta el presente estudio los valores de normalidad considerados se basaban en criterios de poblaciones en otros países, con características antropométricas y étnicas distintas. Se administró una mezcla semisólida de alimento...

  4. Gingivitis ulceronecrosante aguda

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    Eduardo de la Teja-Ángeles

    2015-11-01

    Full Text Available La gingivitis ulcerativa necrosante, conocida por sus siglas en inglés como GUN (anteriormente se le conocía como enfermedad de Vincent o “boca de trinchera” por afectar a soldados en guerra, es una enfermedad poco frecuente.1-6 Se caracteriza por ser una infección aguda y dolorosa en la que las encías sangran, hay necrosis de las papilas interdentales y ataque al estado general.

  5. Insuficiencia renal aguda

    OpenAIRE

    Carlos Hernán Mejía

    1985-01-01

    La insuficiencia renal aguda se diagnostica aproximadamente en 5% de los pacientes hospitalizados. Sus principales causas se relacionan con la alteración del flujo sanguíneo renal, sea por depleción de volumen, baja perfusión renal o por distribución intrarrenal inadecuada y obstrucción del árbol urinario. El diagnóstico parte de la historia clínica y un buen examen físico que corrobore el estado de volemia del paciente y se complementa con el uso adecuado de los índices urinarios (excreción ...

  6. Insuficiencia renal aguda.

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    Carlos Hernán Mejía

    2009-10-01

    Full Text Available La insuficiencia renal aguda se diagnostica aproximadamente en 5% de los pacientes hospitalizados. Sus principales causas se relacionan con la alteración del flujo sanguíneo renal, sea por depleción de volumen, baja perfusión renal o por distribución intrarrenal inadecuada y obstrucción del árbol urinario. El diagnóstico parte de la historia clínica y un buen examen físico que corrobore el estado de volemia del paciente y se complementa con el uso adecuado de los índices urinarios (excreción de sodio y osmolaridad, el uroanálisis y la ecografía renal. Su tratamiento consiste en una adecuada recuperación del volumen, manejo de los diuréticos, soporte nutricional, conservación del equilibrio hidroelectrolítico y brindar terapia de diálisis si hay toxicidad urémica, hipercaliemia severa (>6.5 mEq/l, acidosis metabólica o sobrecarga severa de volumen.

  7. Ataxias agudas en la infancia

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    Yaline Betancourt Fursow

    2013-09-01

    Full Text Available La ataxia cerebelosa aguda infantil (ACAI es la forma más frecuente de complicación neurológica por el virus de la varicela.Descritas dentro del grupo de las cerebelitis agudas. Los objetivos de este estudio fueron: evaluar la presentación clínica, manejo y seguimiento de niños hospitalizados con ACAI en un hospital pediátrico terciario donde la inmunización para varicela no está disponible (parte I y describir los diagnósticos diferenciales de la cerebelitis aguda (parte II. Estudiamos 95 pacientes. Los criterios diagnósticos de ataxia aguda se basaron en: pérdida aguda de la coordinación o dificultad para la marcha con o sin nistagmo asociado y duración menor de 48 horas, en un niño previamente sano. Estos criterios se cumplían en todos los casos valorados, excepto en las ataxias secundarias a ingesta de tóxicos, en los que la duración debía ser menor de 24 horas para su inclusión en el estudio. Se registraron los datos en una historia clínica pediátrica y neurológica. Entre los pacientes inmunosuprimidos la incidencia mayor fue la complicación por varicela. La mayoría de los pacientes fueron varones. El rango de edad fue la preescolar, 5 años . El intervalo entre la presentación del rash y el ingreso fue de 1 a 3 días. El estudio de LCR se practicó en 59.5% de los casos. La TAC y la resonancia magnética cerebral (RM presentaron edema en el 33.3%. El aciclovir endovenoso fue utilizado en 23 pacientes; pero no hubo diferencias significativas en las manifestaciones clínicas y seguimiento entre tratados y no tratados. La ataxia fue la primera manifestación clínica. La estadía hospitalaria fue de 4 días (rango: 2-11 días.

  8. Fase aguda da esquistossomose mansoni

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    Edward Tonelli

    1972-10-01

    Full Text Available O A. faz um estudo panorâmico sobre a fase aguda da esquistossomose mansoni, abordando o quadro clínico e seu diagnóstico, os exames subsidiários, o diagnóstico diferencial, a terapêutica e os aspectos evolutivos. As manifestações clinicas dos períodos de incubação, de estado e de supressão são abordados. O diagnóstico da fase aguda é baseado em dado epidemiológico, 110 exame fisico e em exames subsidiários. O dado epidemiológico. em geral, é positivo, com menção a banho infectante, comumente 30 a 40 dias antes do início do quadro clínico e ao exame físico, encontramos hipertermia (38 - 4G°C, prostração, micropoliadenia hepatomegalia dolorosa em 95%, dos casos e esplenomegalia em 70% dos casos. Os exames prioritários para o diagnóstico são o exame parasiiológico de fezes seriado, que é positivo para ovos viáveis de S. mansoni e o leucograma seriado, que, geralmente, acusa leucocitose com eosinofilia. Em caso de dúvida ou para complementação diagnostica, podemos recorrer à endoscovia retal, ao oograma e á biópsia hepática. A endoscopia acusa, comumente, mucosa hiperêmica, edemaciada, friável, granulosa, com pontos hemorrágicos e o exame colhido por punção biópsia revela, entre outros achados, granulomas na fase necrótica-exsudativa. O diagnóstico diferencial deve ser feito com as seguintes entidades clínicas: gastroenterites. febre tifóide, disenteria bacilar, amebíase aguda, salmonelose septicêrnica prolongada, devendo, ainda, figurar a tuberculose miliar, abdome agudo, a G.N.D.A., a mononucleose infecciosa, a leptospirose, a hepatite e as poaneurites. A terapeutica é baseada nos cuidados gerais, na córticoterapia e na terapêutica específica. Observamos regressão dramática do quadro toxinfeccioso. nas primeiras 24 a 48 horas com a córticoterapia (prednisona que tem duração aproximada de 7 a 10 dias. A terapêutica específica (derivado nitrotiazolico = ambilhar e derivado hidroximet

  9. Biomarcadores da injúria renal aguda

    OpenAIRE

    Luis Alberto Batista Peres; Ademar Dantas da Cunha Júnior; Alex Júnior Schäfer; Aline Liene da Silva; Arianne Ditzel Gaspar; Deborah Francisca Scarpari; Julia Barazetti Ferrari Alves; Rodolfo Girelli Neto; Thaís Figueiredo Teodoro de Oliveira

    2013-01-01

    A creatinina continua a ser o padrão laboratorial para diagnóstico da injúria renal aguda (IRA). Esforços para prevenção da nefrotoxicidade foram prejudicados pelo atraso no diagnóstico da IRA por critérios utilizando somente a creatinina como marcador, havendo, por isso, grande interesse em identificar mais precocemente biomarcadores confiáveis. Além disso, o tratamento precoce da IRA pode ser correlacionado com um melhor prognóstico e a identificação de biomarcadores para um diagnóstico pre...

  10. INSUFICIENCIA RENAL AGUDA CON UREMIA NORMAL EN PACIENTE MONO-RENO SECUNDARIA A PIELONEFRITIS AGUDA

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    Musso CG

    2006-03-01

    Full Text Available RESUMEN:La insuficiencia renal aguda es un sindrome que característicamente cursa con niveles plasmáticos elevados de urea y creatinina. Sin embargo, hay situaciones clínicas en las cuales este sindrome puede cursar con un incremento de la creatininemia sin presentar elevación de la uremia.En este reporte presentamos un caso clínico de una insuficiencia renal aguda con uremia normal secundaria a una pielonefritis aguda en un paciente con riñón único. El paciente presentaba una elevada excreción fraccional de urea lo cual podía explicar su uremia normal pese a estar cursando una caída del filtrado gomerular. Dicha excreción de urea elevada fue interpretada como secundaria a una diabetes insipida nefrogénica y una alteración en el recirculado intra-renal de la urea ambos producto de la pielonefritis aguda. Concluimos que la pielonefritis aguda en un paciente mono-reno puede presentarse con un patrón de insuficiencia renal aguda con uremia normal. SUMMARYAcute renal failure is a syndrome that usually runs with an increase in creatinine and urea plasma levels. However, there are clinical situations in which this syndrome may run with an increase in plasma creatinine keeping normal the urea one.In this report we present a case of acute renal failure with normal plasma urea level secondary to an acute pyelonephritis in a single kidney patient. The patient had an increased fractional excretion of urea which could explain the normal plasma urea levels found despite of his reduced glomerular filtration. This increased urea excretion state was interpreted as a consequence of the nephrogenic diabetes insipidus and alteration of the intra-renal urea reciclying process that the acute pyelonephritis induced. In conclusion: Acute pyelonephritis in a single kidney patient can appear as a pattern of acute renal failure with normal plasma urea levels.

  11. Intoxicación aguda por plaguicidas

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    Durán-Nah Jaime Jesús

    2000-01-01

    Full Text Available OBJETIVO: Describir la epidemiología de la intoxicación aguda por plaguicidas (IAP en el Hospital General O'Horán de Mérida, Yucatán, México. MATERIAL Y MÉTODOS: Se revisaron los expedientes de 33 pacientes superscript three 13 años, tratados en una unidad de cuidados intensivos (UCI, entre 1994 y 1998. Se recopilaron variables demográficas y clínicas relevantes, y se aplicó estadística descriptiva. RESULTADOS: En la población estudiada predominó el sexo masculino (82% del medio rural (70%, y la edad media fue de 34 ± 15.8 años. El intento de suicidio fue causa frecuente de IAP (79%, y en 33% de los casos la intoxicación se produjo por la utilización de organofosforados. La mortalidad fue de 12%. CONCLUSIONES: La IAP fue baja entre los sujetos del medio rural, por lo que los resultados de este estudio parecen no reflejar la realidad del problema. Es importante añadir que los plaguicidas son utilizados con relativa frecuencia para el intento de suicidio.

  12. Esofagitis necrotizante aguda: Una entidad inusual

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    Silvana E. Pramparo

    2010-12-01

    Full Text Available La esofagitis necrotizante aguda (ENA, también denominada esófago negro, es una rara enfermedad poco descripta en la literatura médica. Describimos el caso de un hombre de 80 años, con hemorragia digestiva alta quien desarrolló un esófago negro luego de un episodio de hipotensión. La necrosis fue confirmada histológicamente. Los pacientes se presentan con hematemesis y melena en más del 70% de los casos. Los hallazgos endoscópicos muestran una coloración negruzca de la mucosa esofágica. El diagnóstico se realiza con endoscopia y confirmación histológica. La mortalidad es alta (más del 50% aunque relacionada a las enfermedades de base del paciente. Por último, podemos decir que la sospecha es muy importante en el diagnóstico de ENA, particularmente en pacientes ancianos con enfermedades asociadas y evidencia de hemorragia digestiva alta. En este trabajo describimos las características clínicas, endoscópicas e histopatológicas de un paciente con ENA.

  13. Dacriocistite aguda: relato de 2 casos

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    Silvia Helena Tavares Lorena

    2011-02-01

    Full Text Available A obstrução da via lacrimal no adulto pode ser congênita ou adquirida. No caso da forma adquirida, a etiologia se classifica em não específicas (o que envolve o epitélio de revestimento e/ou o plexo vascular submucoso do ducto lácrimo-nasal e específicas (infecções, inflamações, traumatismos, tumores e iatrogenias. O diagnóstico é estabelecido por meio da anamnese, seguida de avaliação clínica baseada na semiologia das vias lacrimais. Os pacientes acometidos pela obstrução da via lacrimal apresentam epífora, dores agudas e tumefação, principalmente na região do saco lacrimal, ocasionando ainda ectasia do mesmo em grau variável, podendo culminar com fistulização cutânea. Ao exame por imagem, utilizamos rotineiramente a dacriocistografia, que representa um ótimo meio de indicar a técnica cirúrgica mais viável. A dacriocistorrinostomia é indicada assim que for tratado o quadro clínico agudo inflamatório.

  14. Tratamiento paliativo de la obstrucción tumoral del vaciamiento gástrico con prótesis metálicas autoexpandibles insertadas endoscópicamente Palliative management of malignant gastric outlet obstruction with endoscopically inserted self-expanding metal stents

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    J. García-Cano

    2008-06-01

    Full Text Available Antecedentes y objetivo: la inserción de prótesis metálicas autoexpandibles para paliar la obstrucción tumoral del vaciamiento gástrico es un procedimiento mínimamente invasivo, que cada vez se utiliza con más frecuencia. Presentamos la experiencia de esta técnica en un hospital de nivel II del Sistema Nacional de Salud. Pacientes y métodos: estudio retrospectivo de un periodo de cinco años (2003-2007, en los que se trató de resolver la obstrucción tumoral del vaciamiento gástrico en 27 ocasiones a 23 pacientes (media de 0,45 procedimientos por mes, mediante la inserción endoscópica de prótesis no recubiertas (Wallstent® y Wallflex®. Resultados: la inserción fue técnicamente posible en el 100% de los 27 intentos. Se obtuvo un buen resultado clínico en 25 ocasiones (92,5%. Se utilizó sólo endoscopia 10 (37% veces y en las otras 17 (63% también fluoroscopia. Tras la inserción de la prótesis se intervino a un paciente con intención curativa y a otro, en el que la prótesis no funcionó, para realizar una derivación paliativa. Cuatro prótesis se obstruyeron por crecimiento tumoral, recanalizándose mediante la inserción de nuevas prótesis. En tres ocasiones se produjo ictericia obstructiva en prótesis que cubrían la papila de Vater. No hubo otras complicaciones. Tampoco mortalidad derivada del procedimiento. La media de supervivencia fue de 104 días (rango 28-400, DE ± 94. Conclusiones: en nuestra experiencia, la inserción endoscópica de prótesis metálicas autoexpandibles parece un método seguro y eficaz en el tratamiento paliativo de la obstrucción tumoral del vaciamiento gástrico y puede llevarse a cabo con éxito en un centro de nuestras características.Aim and background: the insertion of self-expanding metal stents to palliate malignant gastric outlet obstruction is a minimally invasive procedure that is being increasingly used. We discuss experience with this technique in a level-II hospital in the

  15. Pancreatite aguda : estratificação de risco

    OpenAIRE

    Condado, Daniana Alexandra Sirgado de Alpoim

    2012-01-01

    A pancreatite aguda é definida como uma condição inflamatória aguda do pâncreas, com acometimento variável das estruturas peripancreáticas e órgãos a distância, cuja génese depende da autodigestão do seu parênquima pelas próprias enzimas pancreáticas. Representa uma das principais causas de internamento em unidades de cuidados intensivos de gastroenterologia. A sua incidência varia nos diferentes países e depende da etiologia. A sua patogénese ainda não está completamente esclarecida, mas con...

  16. Toxicología aguda del D-004 en conejos

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    Ariadne Gutiérrez Martínez

    2007-01-01

    entre los grupos tratados y el control en ninguno de los sexos. El D-004 presentó una toxicidad intrínseca baja, al mostrar una DL50 superior a los 2 000 mg/kg de peso corporal, dosis con la que no se evidenciaron signos indicativos de toxicidad en ninguno de los sexos, por lo que su toxicidad se puede declarar como no clasificable según el método de las clases de toxicidad aguda.

  17. Radical Evil

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    Carlos Manrique

    2007-12-01

    Full Text Available There is an aporia in Kant’s analysis of evil: he defines radical evilas an invisible disposition of the will, but he also demands an inferential connection between visible evil actions and this invisible disposition. This inference,however, undermines the radical invisibility of radical evil according to Kant’s own definition of the latter. Noting how this invisibility of moral worth is a distinctive feature of Kant’s approach to the moral problem, the paper then asks why, in the Groundwork, he nonetheless forecloses a question about evil that seems to be consistent with this approach. It is argued that to account for this aporia and this foreclosure, one has to interrogate the way in which the category of religion orients Kant’s incipient philosophy of history in Die Religion.

  18. Radical prostatectomy

    DEFF Research Database (Denmark)

    Fode, Mikkel; Sønksen, Jens; Jakobsen, Henrik

    2014-01-01

    OBJECTIVE: The aim of this study was to compare oncological and functional outcomes between robot-assisted laparoscopic radical prostatectomy (RALP) and retropubic radical prostatectomy (RRP) during the initial phase with RALP at a large university hospital. MATERIAL AND METHODS: Patient and tumour...... surgery and at follow-up and they were asked to report their use of pads/diapers. Potency was defined as an IIEF-5 score of at least 17 with or without phosphodiesterase-5 inhibitors. Patients using up to one pad daily for security reasons only were considered continent. Positive surgical margins, blood...... loss and functional outcomes were compared between groups. RESULTS: Overall, 453 patients were treated with RRP and 585 with RALP. On multivariate logistic regression analyses, the type of surgery did not affect surgical margins (p = 0.96) or potency at 12 months (p = 0.7). Patients who had undergone...

  19. Classificação de gravidade na pancreatite aguda

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    Tercio De Campos

    2013-04-01

    Full Text Available De acordo com a Classificação de Atlanta a pancreatite aguda pode ser dividida, baseado em sua severidade, em uma forma leve ou grave. Uma série de aspectos têm sido discutidos nos últimos anos, tais como, quantas categorias de gravidade devem ser consideradas; se o doente com falência orgânica é igual ao doente com necrose infectada; qual o papel da falência orgânica transitória; e como avaliar a falência orgânica. A reunião de revista"Telemedicina Baseada em Evidência - Cirurgia do Trauma e Emergência" (TBE-CiTE realizou uma avaliação crítica de artigos relacionados a este tema, considerando três artigos recentes que delinearam duas grandes revisões publicadas nos últimos meses. Estes artigos sugerem a classificação de gravidade em três ou quatro categorias, ao invés de pancreatite aguda leve ou grave, além de discutir qual o melhor escore para avaliar a falência orgânica. As seguintes recomendações foram propostas: (1 A pancreatite aguda deve ser classificada em quatro categorias: leve, moderada, grave e crítica, o que permite uma melhor determinação das características dos doentes; (2 Avaliação de falência orgânica com um escore de gravidade, preferencialmente algum que avalie diretamente cada falência orgânica, tais como o SOFA e o MODS (Marshall. O SOFA parece ter maior acurácia, mas o MODS tem melhor aplicabilidade devido à facilidade de uso.

  20. Recomendaciones para el manejo de la faringoamigdalitis aguda del adulto

    OpenAIRE

    Cots, Josep M; Juan-Ignacio Alós; Mario Bárcena; Xavier Boleda; José L. Cañada; Niceto Gómez; Ana Mendoza; Isabel Vilaseca; Carles Llor

    2015-01-01

    La faringoamigdalitis aguda (FAA) en el adulto es una de las enfermedades infecciosas más comunes en la consulta del médico de familia. La etiología más frecuente es viral. Dentro de la etiología bacteriana, el principal agente responsable es Streptococcus pyogenes o estreptococo β-hemolítico del grupo A (EBHGA), causante del 5-30% de los casos. En el manejo diagnóstico, las escalas de valoración clínica para predecir la posible etiología bacteriana, son una buena ayuda para seleccionar a qué...

  1. Insuficiencia renal aguda asociada a picadura de abeja africanizada

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    Verny Huertas-Franco

    2008-03-01

    Full Text Available Se presenta el caso de un adulto mayor diabético tipo 2, que sufrió un ataque masivo de abejas africanizadas, y llegó a la sala de emergencias tres horas después del inicio del ataque. El paciente presentó insuficiencia renal aguda por combinación de factores, y se recuperó con tratamiento de diálisis temprana. Se discuten los problemas que refieren estos pacientes, y cuál sería el manejo ideal de tales casos.

  2. Pancreatite Aguda Necrosante — Caso Clínico

    OpenAIRE

    Soares, E.; Alves, R.; M. España; Vale, MC; Barata, D; J. Magalhães; C. Vasconcelos

    1998-01-01

    Os autores apresentam um caso clínico de Pancreatite Aguda Hemorrágica, de provável etiologia idiopática, numa criança de 10 meses, que se manifestou inicialmente por vómitos, e alteração do estado de consciência e posteriormente por abdómen agudo. O diagnóstico foi feito durante a laparotomia. Houve boa evolução clínica. Como complicações, refere-se o aparecimento de dois pseudoquistos pancreáticos que regrediram progressiva e espontaneamente.

  3. Tratamento de leucemia linfóide aguda e crescimento

    OpenAIRE

    Monteiro I.M.U.; Bedone A.J.; Pinto C.L.B.; Brandalise S.R.

    1998-01-01

    OBJETIVO: Determinar alterações no crescimento após o tratamento de leucemia linfóide aguda em meninas. PACIENTES E MÉTODO: Realizou-se estudo retrospectivo com 59 meninas que apresentavam medidas de estatura antes e com no mínimo um ano do tratamento, subdivididas de acordo com a dose de radioterapia cranial utilizada [18 ou 24 Grays (Gy)] e com a idade no início do tratamento (antes e após os cinco anos de idade). RESULTADOS: Observou-se deficiência do crescimento com um, dois e mais de doi...

  4. Bronquiolite aguda, uma revisão atualizada

    OpenAIRE

    Werther Brunow de Carvalho; Cíntia Johnston; Marcelo Cunio Fonseca

    2007-01-01

    A bronquiolite aguda (BA) é um diagnóstico freqüente de internação hospitalar em pediatria, ocasionada principalmente pelo vírus sincicial respiratório (VSR). Ocorre epidemicamente nos meses de outono e inverno. Algumas populações de crianças (recém-nascidos pré-termo, cardiopatia congênita, doença pulmonar crônica, imunocomprometidos, desnutridos, entre outros) apresentam maior risco de morbidade e mortalidade. Os vírus multiplicam-se nas células epiteliais ciliadas, e a inflamação e os debr...

  5. Roaming Radicals

    Science.gov (United States)

    Bowman, Joel M.; Shepler, Benjamin C.

    2011-05-01

    Roaming is a recently verified unusual pathway to molecular products from unimolecular dissociation of an energized molecule. Here we present the evidence for this pathway for H2CO and CH3CHO. Theoretical analysis shows that this path visits the plateau region of the potential energy surface near dissociation to radical products. It is not clear whether roaming is a distinct isolated pathway, in addition to the conventional one via the well-known molecular saddle-point transition state. Evidence is presented to suggest that the two pathways may originate from a single, but highly complicated, dividing surface. Other examples of unusual reaction dynamics are also reviewed.

  6. Oclusión arterial aguda asociada a hidatidosis diseminada

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    Jose Somocurcio

    2014-06-01

    Full Text Available Hidatidosis o equinococosis son términos usados para denominar a la infestación zoonótica causada por los estadios adulto y larvario (metacéstode del céstode del género Equinococcus (familia tenidae. El término hidatidosis debe ser aplicado a la infestación por el metacéstode mientras que el de equinococosis a los estadios larvario y adulto. En el Perú existe una alta prevalencia de esta infección siendo el hígado y pulmón los órganos más afectados. Existen factores tanto del agente infeccioso como del hospedero que contribuyen a esta infección, donde el componente inmunológico del hospedero es un punto importante tanto en la infección como en la diseminación. En el presente artículo se reporta un caso de oclusión arterial aguda asociada a hidatidosis diseminada en un paciente de 54 años de edad, natural y procedente de Huancavelica, de inicio súbito con un cuadro de obstrucción arterial aguda; que no mejoró luego de la cirugía con fallecimiento a las 48 horas de la presentación

  7. Oclusión arterial aguda asociada a hidatidosis diseminada

    Directory of Open Access Journals (Sweden)

    Jose Somocurcio

    2014-04-01

    Full Text Available Hidatidosis o equinococosis son términos usados para denominar a la infestación zoonótica causada por los estadios adulto y larvario (metacéstode del céstode del género Equinococcus (familia tenidae. El término hidatidosis debe ser aplicado a la infestación por el metacéstode mientras que el de equinococosis a los estadios larvario y adulto. En el Perú existe una alta prevalencia de esta infección siendo el hígado y pulmón los órganos más afectados. Existen factores tanto del agente infeccioso como del hospedero que contribuyen a esta infección, donde el componente inmunológico del hospedero es un punto importante tanto en la infección como en la diseminación. En el presente artículo se reporta un caso de oclusión arterial aguda asociada a hidatidosis diseminada en un paciente de 54 años de edad, natural y procedente de Huancavelica, de inicio súbito con un cuadro de obstrucción arterial aguda; que no mejoró luego de la cirugía con fallecimiento a las 48 horas de la presentación

  8. Terapia cognitivo-conductual en las psicosis agudas

    Directory of Open Access Journals (Sweden)

    María Isabel Gutiérrez López

    2012-01-01

    Full Text Available El tratamiento de las psicosis agudas era, hasta hace unos años, algo relegado al tratamiento farmacológico (a excepción del psicoanálisis. En los últimos tiempos esa tendencia ha ido cambiando y diversos estudios han puesto de manifiesto la ventaja de las intervenciones cognitivo conductuales en las fases agudas de las psicosis. A esta tendencia se ha unido un nuevo y prometedor paradigma de intervención temprana en psicosis. En el presente estudio se muestra una revisión bibliográfica de las investigaciones más relevantes publicadas hasta la fecha en torno a esta temática. Se incluyeron aquellos trabajos con un diseño controlado y aleatorio, que garantizaban requisitos de fiabilidad y validez. Los estudios muestran resultados esperanzadores, en cuanto que avalan la eficacia de la TCC como medida de tratamiento. Sin embargo, todavía se hace necesario un mayor número de investigaciones que avalen estos datos.

  9. Algunas observaciones sobre la apendicitis aguda en los niños

    OpenAIRE

    Piñeros Suárez, Luis

    2011-01-01

    La apendicitis aguda en los niños, presenta actitudes particulares que diferencian de la apendicitis aguda del adulto y que vienen a formar grupos clínicos casi exclusivamente de la infancia. De una manera general, las formas más graves, las formas fulminantes de la apendicitis aguda se encuentran especialmente en la infancia y en estas formas graves llama poderosamente la atención, la falta de relación entre los signos clínicos observados y la importancia de las lesiones encontradas en el ap...

  10. Papel del estrés oxidativo y del tejido adiposo en la pancreatitis aguda experimental

    OpenAIRE

    Pérez Garrido, Salvador

    2013-01-01

    La pancreatitis aguda es un proceso inflamatorio agudo del páncreas con afectación variable de otros tejidos y sistemas orgánicos alejados. La incidencia de la pancreatitis aguda en la Unión Europea y Estados Unidos varía de 5 a 30 casos/100.000/año (Ellis y cols., 2009). La mortalidad en pacientes con pancreatitis aguda es alrededor del 5%, pero este porcentaje aumenta al 17-20% en pacientes con pancreatitis necrotizante (Pandol y cols., 2007). La participación del estrés oxidativo en la ...

  11. Esofagitis necrosante aguda: análisis retrospectivo Acute esophageal necrosis: a retrospective case series

    OpenAIRE

    R Ramos; Mascarenhas, J.; P. Duarte; C. Vicente; Casteleiro, C.

    2008-01-01

    Introducción: la esofagitis necrosante aguda es una entidad rara. Se reconoce por el aspecto negro difuso del esófago a la endoscopia. Su incidencia e patogénesis se desconoce. Pacientes y métodos: se analizaron retrospectivamente 11 pacientes con esofagitis necrosante aguda desde el punto de vista de los datos clínicos, de laboratorio y endoscopicos en 2 años. Resultados: se analizaron las endoscopias realizadas a 3.976 pacientes, observándose esofagitis necrosante aguda en 11 pacientes. El ...

  12. Comportamiento de la enfermedad diarreica aguda en Guatemala

    Directory of Open Access Journals (Sweden)

    Mario Enrique Plá Acevedo

    2015-12-01

    Full Text Available Se realizó un estudio descriptivo de corte transversal, con el objetivo de conocer el comportamiento de la Enfermedad Diarreica Aguda (EDA en Tierra Blanca, Departamento Petén, Guatemala; en el período comprendido de enero a diciembre del año 2011. El universo de estudio lo formaron todos los individuos que fueron evaluados en el puesto de salud de Tierra Blanca con diagnóstico clínico de EDA. La muestra estuvo constituida por 529 pacientes. Se trabajó con el Sistema de Información Gerencial en Salud 18 (SIGSA, las fichas de salud individual de cada paciente, así como una entrevista estructurada que se le aplicó a los mismos, previo consentimiento informado; información con la cual se obtuvieron las variables relacionadas con los aspectos socio-demográficos, epidemiológicos y clínicos. Los meses donde más casos se reportaron fueron entre mayo y septiembre, coincidiendo esto con los meses de lluvias. Las edades más frecuentes fueron de uno a diez años y el sexo que predominó fue el masculino. El 40,3% consumían agua procedente de chorro intradomiciliario; las infecciones respiratorias agudas fueron las patologías que con más frecuencia se asociaron a las EDA y el 88,1% recibió tratamiento con sales de rehidratación oral.

  13. Ignorance Radicalized

    Directory of Open Access Journals (Sweden)

    Gergo Somodi

    2009-12-01

    Full Text Available The aim of this paper is twofold. I criticize Michael Devitt's linguistic---as opposed to Chomsky's psychological---conception of linguistics on the one hand, and I modify his related view on linguistic intuitions on the other. I argue that Devitt's argument for the linguistic conception is in conflict with one of the main theses of that very conception, according to which linguistics should be about physical sentence tokens of a given language rather than about the psychologically real competence of native speakers. The basis of this conflict is that Devitt's view on language, as I will show, inherits too much from the criticized Chomskian view. This is also the basis of Devitt's strange claim that it is the linguist, and not the ordinary speaker, whose linguistic intuition should have an evidential role in linguistics. I will argue for the opposite by sketching a view on language that is more appropriate to the linguistic conception. That is, in criticizing Devitt, I am not defending the Chomskian approach. My aim is to radicalize Devitt's claims.

  14. Recomendaciones para el manejo de la faringoamigdalitis aguda del adulto

    Directory of Open Access Journals (Sweden)

    Josep M. Cots

    2015-10-01

    Full Text Available La faringoamigdalitis aguda (FAA en el adulto es una de las enfermedades infecciosas más comunes en la consulta del médico de familia. La etiología más frecuente es viral. Dentro de la etiología bacteriana, el principal agente responsable es Streptococcus pyogenes o estreptococo β-hemolítico del grupo A (EBHGA, causante del 5-30% de los casos. En el manejo diagnóstico, las escalas de valoración clínica para predecir la posible etiología bacteriana, son una buena ayuda para seleccionar a qué pacientes se deben practicar las técnicas de detección rápida de antígeno estreptocócico. Es conocido que, en general, sin estas técnicas se tiende al sobrediagnóstico de FAA estreptocócica, con la consiguiente prescripción innecesaria de antibióticos, muchas veces de amplio espectro. Así, con el manejo de las escalas y la técnica de diagnóstico rápido, elaboramos los algoritmos de manejo de la FAA. Los objetivos del tratamiento son acelerar la resolución de los síntomas, reducir el tiempo de contagio y prevenir las complicaciones supurativas locales y no supurativas. Los antibióticos de elección para el tratamiento de la FAA estreptocócica son penicilina y amoxicilina. La asociación de amoxicilina y clavulánico no está indicada en el tratamiento inicial en la infección aguda. Los macrólidos tampoco son un tratamiento de primera elección; su uso debe reservarse para pacientes con alergia a la penicilina. Es importante en nuestro país adecuar tanto el diagnóstico de la FAA bacteriana y la prescripción de antibióticos a la evidencia científica disponible. La implantación de protocolos de actuación en las farmacias comunitarias puede ser de utilidad para identificar y cribar los casos que no requieran tratamiento antibiótico.

  15. Meningoencefalite na fase aguda do sarampo : relato de seis casos

    Directory of Open Access Journals (Sweden)

    EL-FAR FABIANE

    2000-01-01

    Full Text Available Apresentamos 6 casos de meningoencefalite aguda por sarampo, diagnosticados durante epidemia na cidade de São Paulo, em 1997. Os prontuários dos 6 pacientes foram analisados retrospectivamente. O diagnóstico de meningoencefalite baseou-se nas alterações clínicas e liquóricas, e foi confirmado por sorologia específica. Dos 467 pacientes com sarampo atendidos no Instituto de Infectologia Emílio Ribas nesse período, estes 6 evoluíram com alterações neurológicas e liquóricas durante a fase exantemática, sendo a sonolência e rigidez de nuca os achados mais frequentes. Os pacientes tinham entre 2 meses e 28 anos de idade. O exame do líquor mostrou pleocitose em todos. Não houve correlação entre a severidade do quadro clínico e liquórico com a evolução. Em 4 casos foi necessária internação na unidade de terapia intensiva; destes, 2 foram intubados. Apenas 2 pacientes apresentaram alterações na tomografia computadorizada de crânio. Todos tiveram boa evolução, sem sequelas.

  16. Pericarditis aguda: diagnóstico electrocardiográfico

    Directory of Open Access Journals (Sweden)

    Abraham enrique Katime Zúñiga

    2014-06-01

    Full Text Available La pericarditis es un proceso inflamatorio del pericardio, por lo general relacionado con procesos virales respiratorios o gastrointestinales; esta entidad es una de las principales causas de dolor torácico en el servicio de urgencias. El médico debe estar familiarizado con las manifestaciones clínicas y el flujograma diagnóstico. El diagnóstico de la pericarditis usualmente es clínico, los estudios paraclínicos evidencian inflamación sistémica (leucocitosis, aumento de la VSG y PCR. Las enzimas cardíacas (CPK MB – Troponinas se encuentran elevadas en casos de compromiso miocárdico asociado (Miopericarditis. El ecocardiograma revela derrame pericárdico, y el electrocardiograma se caracteriza por elevación difusa del segmento ST. En este artículo revisaremos los principales cambios electrocardiográficos relacionados a la pericarditis aguda y sus complicaciones. (Duazary 2009-II 159-164

  17. Formas agudas de periodontitis Acute conditions of periodontal disease

    Directory of Open Access Journals (Sweden)

    L. Pérez-Salcedo

    2008-04-01

    Full Text Available La clasificación de las Enfermedades Periodontales ha cambiado en las últimas décadas. En la clasificación la AAP de 1989 la periodontitis necrotizante ocupaba el cuarto lugar. En el Workshop Europeo de 1993 la periodontitis necrotizante aparece en el grupo de los descriptores primarios. Según el Internacional Workshop for a Classification of Periodontal Diseases and Conditions 1999 en el que se revisó y se modificó la clasificación de las patologías periodontales, las enfermedades periodontales necrotizantes ocupan el punto cinco, diferenciándose entre Gingivitis Necrotizante y Periodontitis Necrotizante. Y se añade en la clasificación el grupo de abscesos periodontales. En este artículo de revisión vamos a profundizar acerca de las formas agudas de periodontitis.The Periodontal Diseases classification had changed in the last decades. In AAP classification of 1989 the necrotize was in the 4th position. In the European Workshop was in the group of primary descriptors. According to the International Workshop for a Classification of Periodontal Diseases and Conditions 1999, review and modificated the classification of periodontal pathologies, the periodontal necrotize diseases are in the 5th position, distinguishing between Necrotize Gingivitis and Necrotize Periodontitis. And Peridontal Abscesses was add to the classification. In this paper we are going to review about the acute forms of Periodontal Diseases.

  18. Detección molecular de las translocaciones más comunes en leucemia aguda mediante rt-pcr

    OpenAIRE

    Guevara G.; García L.

    2011-01-01

    Evaluar la incidencia de las translocaciones t(4;11), t(1;19), t(9;22) y t(12;21) en leucemia linfoide aguda (LLA) y t(15;17), t(8;21) e Inv.(16) en leucemia mieloide aguda (LMA). Correlacionar los resultados obtenidos con el diagnóstico morfológico y citogenético.

  19. Ventilación mecánica en el paciente con lesión cerebral aguda

    OpenAIRE

    Tomicic, Vinko; Andresen, Max

    2011-01-01

    El objetivo de este trabajo es describir aspectos relacionados con el manejo de la vía aérea superior, de la ventilación mecánica y sus consecuencias, haciendo especial énfasis en aquellos casos en que la lesión cerebral aguda se encuentra acompañada de insuficiencia respiratoria aguda (IRA).

  20. Vasculite necrosante na glomerulonefrite difusa aguda pós-infecciosa

    Directory of Open Access Journals (Sweden)

    Riyuso Márcia C

    2004-01-01

    Full Text Available Os autores relatam dois casos de glomerulonefrite difusa aguda pós-infecciosa com evolução clinicomorfológica incomum. As biópsias renais mostraram alterações características de glomerulonefrite difusa aguda associada à extensa necrose fibrinóide e infiltrado inflamatório leucocitário na parede de arteríolas e artérias interlobulares. Foram também observadas crescentes. Ambos os pacientes cursaram com insuficiência renal aguda severa, sendo que um dos pacientes recuperou a função renal e outro evoluiu para insuficiência renal crônica e óbito.

  1. Nutrición en pancreatitis aguda Nutrition acute pancreatitis

    Directory of Open Access Journals (Sweden)

    F. J. García-Alonso

    2012-04-01

    Full Text Available La pancreatitis aguda es una patología frecuente y potencialmente grave en la que el manejo nutricional influye de manera importante en su desarrollo, de tal forma que se puede considerar un tratamiento específico en los casos graves. Éstos suponen aproximadamente el 20% de los pacientes y presentan una mortalidad entre el 8-39%. En los casos leves se suele proceder a un ingreso en dieta absoluta y posterior reintroducción progresiva de la dieta. Aunque se ha demostrado que una reintroducción temprana acorta la duración del ingreso, existe incertidumbre acerca del momento y del tipo de dieta idóneos. Las pancreatitis graves son estados hipercatabólicos que se presentan en pacientes que frecuentemente presentan déficits nutricionales basales. El soporte nutricional iniciado precozmente por vía enteral ha demostrado un beneficio significativo respecto a la vía parenteral en cuanto a tasa de infección, control de glucemia y mortalidad. Este beneficio puede relacionarse con una disminución de la traslocación bacteriana. Si bien tradicionalmente se ha empleado la vía nasoyeyunal, existen estudios que apoyan la vía nasogástrica, mucho más accesible. En el siguiente texto ofrecemos una revisión actualizada del manejo nutricional en la pancreatitis aguda, intentando responder de manera clara y con un enfoque práctico a las preguntas que más frecuentemente se presentan en el manejo de esta patología.Acute pancreatitis is a common and potentially severe disease where nutritional support does affect its development in a way it may be considered a treatment in severe cases. These include around 20% of patients and present mortality rates of 8%-39%. In mild acute pancreatitis patients are prescribed nil per os at admission and advance diet in a progressive manner the following days. Although early introduction of diet has proven to shorten the length of stay, it is still not clear when and how to introduce diet. Severe disease is a

  2. Plasmaférese como modalidade terapêutica na pancreatite aguda por hipertrigliceridemia

    OpenAIRE

    Felipe Soares Castelliano Lucena de Castro; Ana Maria Reis Nascimento; Igor Amorim Coutinho; Fernanda Ribeiro de Fernandez Y Alcazar; Jorge Mugayar Filho

    2012-01-01

    Pancreatite aguda é uma condição inflamatória manifestada clinicamente por dor abdominal e níveis séricos elevados das enzimas pancreáticas. A hipertrigliceridemia é sua terceira causa mais comum. O presente relato teve por objetivo descrever um caso de pancreatite aguda por hipertrigliceridemia, cuja modalidade terapêutica utilizada foi a plasmaférese. Paciente, gênero feminino, 48 anos, apresentou-se ao hospital com queixa de "dor muito forte na barriga". Relatou início do quadro com náusea...

  3. Bronquiolite aguda, uma revisão atualizada

    Directory of Open Access Journals (Sweden)

    Werther Brunow de Carvalho

    2007-04-01

    Full Text Available A bronquiolite aguda (BA é um diagnóstico freqüente de internação hospitalar em pediatria, ocasionada principalmente pelo vírus sincicial respiratório (VSR. Ocorre epidemicamente nos meses de outono e inverno. Algumas populações de crianças (recém-nascidos pré-termo, cardiopatia congênita, doença pulmonar crônica, imunocomprometidos, desnutridos, entre outros apresentam maior risco de morbidade e mortalidade. Os vírus multiplicam-se nas células epiteliais ciliadas, e a inflamação e os debris celulares ocasionam obstrução da via aérea, hiperinsuflação, atelectasia localizada, chiado e alterações das trocas gasosas. Não existem evidências definitivas em relação aos tratamentos utilizados para esta doença. O tratamento inclui a utilização de oxigênio, hidratação, beta-2 agonistas por via inalatória, epinefrina racêmica, DNase recombinante, fisioterapia respiratória, entre outros. Medidas profiláticas: administração de anticorpos monoclonais (palivizumab. A maioria das crianças com BA, independentemente da gravidade da doença, recuperam-se sem seqüelas. O curso natural desta doença, habitualmente, varia entre sete a dez dias, mas algumas crianças permanecem doentes por semanas.

  4. Injúria renal aguda: um alerta global

    Directory of Open Access Journals (Sweden)

    Philip Kam Tao Li

    2013-03-01

    Full Text Available A Injúria Renal Aguda (IRA é cada vez mais prevalente nos países desenvolvidos e nos em desenvolvimento, e está associada com morbidade e mortalidade severas. A maioria das causas da IRA pode ser evitada por meio de intervenções em nível individual, comunitário, regional e intra-hospitalar. Medidas efetivas devem incluir, em toda a comunidade, os esforços para aumentar a consciência dos efeitos devastadores do IRA e fornecer orientações sobre as estratégias de prevenção, bem como o reconhecimento e tratamento precoces. Os esforços devem ser focados em minimizar as causas de IRA, aumentando a consciência da importância de medidas seriadas de creatinina sérica em pacientes de alto risco para IRA, e documentar o volume de urina em pessoas gravemente doentes para obtenção de diagnóstico precoce; até o momento, não há ainda um papel definitivo para outros biomarcadores. Há a necessidade de protocolos para sistematizar a conduta em condições de IRA pré-renal e em infecções específicas. Dados mais precisos sobre a verdadeira incidência e o impacto clínico da IRA ajudarão a melhor conhecer a importância desta doença, a aumentar o conhecimento de IRA por parte dos governantes, dos médicos em geral e de outros profissionais de saúde para ajudar na prevenção da doença. A prevenção é a chave para evitar a pesado ônus de mortalidade e morbidade associada com IRA.

  5. Radical prostatectomy - discharge

    Science.gov (United States)

    ... prostatectomy - discharge; Laparoscopic radical prostatectomy - discharge; LRP - discharge; Robotic-assisted laparoscopic prostatectomy - discharge ; RALP - discharge; Pelvic lymphadenectomy - ...

  6. Radical theory of rings

    CERN Document Server

    Gardner, JW

    2003-01-01

    Radical Theory of Rings distills the most noteworthy present-day theoretical topics, gives a unified account of the classical structure theorems for rings, and deepens understanding of key aspects of ring theory via ring and radical constructions. Assimilating radical theory's evolution in the decades since the last major work on rings and radicals was published, the authors deal with some distinctive features of the radical theory of nonassociative rings, associative rings with involution, and near-rings. Written in clear algebraic terms by globally acknowledged authorities, the presentation

  7. [Lavoisier and radicals].

    Science.gov (United States)

    Lafont, Olivier

    2007-01-01

    Lavoisier and his co-workers (Guyton de Morveau, Bertholet, Fourcroy) considered that acids were constituted of oxygen and of something else that they called radicals. These radicals were known in some cases, i.e. nitrogen for nitrous acid, carbon for carbonic acid, phosphorus for phosphoric acid. In the case of sulfur, the sulfuric radical could be associated with different quantities of oxigen leading to sulfuric or sulfurous acids. In other cases radicals remained unknown at the time i.e. muriatic radical for muriatic acid, or benzoyl radical for benzoic acid. It is interesting to notice that Lavoisier evoked the case of compound radicals constituted of different substances such as carbon and hydrogen.

  8. Incidencia de la enfermedad diarreica aguda en menores de cinco años

    Directory of Open Access Journals (Sweden)

    Mayelín Ávila Labrada

    2015-05-01

    Full Text Available La enfermedad diarreica aguda es motivo frecuente de consulta pediátrica, representando un problema grave de salud pública. Los agentes infecciosos son causa frecuente de diarrea aguda. Se realizó un estudio descriptivo, retrospectivo sobre la prevalencia de la enfermedad diarreica aguda en menores de cinco años, atendidos en la clínica “Simón Bolívar” en la ciudad de Mariara del municipio Diego Ibarra, Carabobo, Venezuela; en el periodo comprendido entre enero de 2008 y diciembre de 2012, lo cual ofreció información de cinco años completos. La prevalencia de la enfermedad diarreica aguda disminuyó significativamente en el intervalo 2009-2011, sin embargo, se caracterizó por tener la mayor prevalencia en los años extremos, 2012 y 2008, por ese orden. Los varones y los del grupo de uno a cuatro años fueron los que más incidieron en cada uno de los años estudiados

  9. Efectividad de la magnetoterapia como tratamiento en pacientes con lumbalgia aguda

    Directory of Open Access Journals (Sweden)

    Raidel González Rodríguez

    2015-05-01

    Full Text Available Son numerosos los pacientes aquejados de algias vertebrales, tanto lumbares como dorsales y cervicales. Se realizó esta investigación con el objetivo de determinar la efectividad de la magnetoterapia como tratamiento en la lumbalgia aguda, en pacientes atendidos en el policlínico universitario “Raúl Sánchez” de la provincia de Pinar del Río, Cuba. Se realizó un estudio descriptivo, prospectivo, de corte transversal en pacientes con lumbalgia aguda, pertenecientes a dicha área de salud. La muestra quedó conformada por 68 pacientes de ambos sexos con lumbalgia aguda, diagnosticados clínicamente y mayores de 17 años de edad. En la investigación predominó el sexo femenino (67,6 % y el rango de edad estuvo entre 40 y 49 años. El esfuerzo físico fue el principal factor desencadenante (47,1 %. Con el tratamiento de la magnetoterapia aplicado a los pacientes se redujeron los estadios del dolor. La mayoría de los pacientes presentaron una respuesta clínica excelente y mejoraron los síntomas entre los siete y diez días (61,8 %. No se reportaron efectos adversos. La magnetoterapia resultó efectiva en el tratamiento de pacientes aquejados de lumbalgia aguda

  10. Síndrome de Guillain-Barré associada a pancreatite aguda: relato de caso

    Directory of Open Access Journals (Sweden)

    GRZESIUK ANDERSON KUNTZ

    1999-01-01

    Full Text Available Relatamos um caso clínico de síndrome de Guillain-Barré associada a pancreatite aguda, e realizamos revisão na literatura sobre complicações clínicas relacionadas à síndrome de Guillain- Barré. Sugerimos estarem os eventos clínicos relacionados imunologicamente.

  11. Síndrome de Guillain-Barré associada a pancreatite aguda: relato de caso

    OpenAIRE

    GRZESIUK ANDERSON KUNTZ; SANTOS LUIZ AUGUSTO DOS

    1999-01-01

    Relatamos um caso clínico de síndrome de Guillain-Barré associada a pancreatite aguda, e realizamos revisão na literatura sobre complicações clínicas relacionadas à síndrome de Guillain- Barré. Sugerimos estarem os eventos clínicos relacionados imunologicamente.

  12. Laparoscopic Radical Trachelectomy

    OpenAIRE

    Rendón, Gabriel J.; Ramirez, Pedro T.; Frumovitz, Michael; Schmeler, Kathleen M.; Pareja, Rene

    2012-01-01

    Introduction: The standard treatment for patients with early-stage cervical cancer has been radical hysterectomy. However, for women interested in future fertility, radical trachelectomy is now considered a safe and feasible option. The use of minimally invasive surgical techniques to perform this procedure has recently been reported. Case Description: We report the first case of a laparoscopic radical trachelectomy performed in a developing country. The patient is a nulligravid, 30-y-old fem...

  13. Laparoscopic radical cystectomy

    OpenAIRE

    Fergany, Amr

    2012-01-01

    Objective Laparoscopic radical cystectomy (LRC) has emerged as a minimally invasive alternative to open radical cystectomy (ORC). This review focuses on patient selection criteria, technical aspects and postoperative outcomes of LRC. Methods Material for the review was obtained by a PubMed search over the last 10 years, using the keywords ‘laparoscopic radical cystectomy’ and ‘laparoscopic bladder cancer’ in human subjects. Results Twenty-two publications selected for relevance and content we...

  14. RENDIMIENTO Y RECUPERACIÓN AGUDA EN CORREDORES DE RESISTENCIA

    Directory of Open Access Journals (Sweden)

    D. A. Boullosa

    2010-09-01

    Full Text Available

     

    RESUMEN

    Dieciséis corredores de fondo bien entrenados fueron evaluados en dos días diferentes mediante la prueba de carrera en pista de la Universidad de Montreal (UMTT y el tiempo límite a la velocidad aeróbica máxima (Tlim. Se examinó la respuesta de la frecuencia cardiaca y la lactatemia en la recuperación aguda (andando. La frecuencia cardiaca máxima fue diferente entre los dos días de valoración (p = 0,001, resultando superior en el UMTT respecto del Tlim. La recuperación de la frecuencia cardiaca en el primer minuto (RFC1 correlacionó con la velocidad aeróbica máxima (r = 0,611 y r = 0,615, p = 0,012; en el UMTT y el Tlim, respectivamente, correlacionando además los dos valores de RFC1 entre sí  (r = 0,824; p = 0,000. La diferencia en la lactatemia entre la finalización y el minuto diez de la recuperación fue estadísticamente significativa sólo después del UMTT (p = 0,013. Se concluye que: 1 fue hallada una relación moderada entre la recuperación cardiaca y la velocidad aeróbica máxima en corredores de resistencia; 2 la frecuencia cardiaca máxima obtenida en una prueba incremental en el campo es superior a la alcanzada en una prueba de tipo rectangular; 3 el descenso significativo de la lactatemia a los 10 min sólo se observó después del UMTT, lo que sugiere una influencia del protocolo de carrera en este parámetro.
    Palabras Clave: frecuencia cardiaca, lactato, recuperación, velocidad aeróbica máxima

     

    ABSTRACT

    Sixteen well-trained endurance runners were evaluated in two different days with the Université de Montréal Track Test (UMTT, and the time limit at maximum aerobic

  15. Detección molecular de las translocaciones más comunes en Leucemia aguda mediante RT-PCR

    Directory of Open Access Journals (Sweden)

    Guevara G.

    2001-06-01

    Full Text Available Evaluar la incidencia de las translocaciones t(4;11, t(1;19, t(9;22 y t(12;21 en leucemia linfoide aguda (LLA y t(15;17, t(8;21 e Inv.(16 en leucemia mieloide aguda (LMA. Correlacionar los resultados obtenidos con el diagnóstico morfológico y citogenético.

  16. Estado oxidante e antioxidante de crianças com bronquiolite aguda

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    Rusen Dundaroz

    2013-08-01

    Full Text Available OBJETIVO: O estresse oxidativo demonstrou contribuir para a patogênese de doenças pulmonares inflamatórias agudas e crônicas. Nosso objetivo foi avaliar o estado oxidante/antioxidante de crianças com bronquiolite aguda por meio de mensuração da capacidade antioxidante total do plasma, estado oxidante total e índice de estresse oxidativo. MÉTODOS: As crianças com bronquiolite aguda encaminhadas para o Departamento de Emergência Pediátrica do hospital universitário entre janeiro e abril 2012 foram comparadas a controles saudáveis de mesma idade. Os pacientes com bronquiolite aguda tiveram essa doença classificada como leve e moderada. O estado oxidante e antioxidante foi avaliado pela mensuração da capacidade antioxidante total do plasma, estado oxidante total e índice de estresse oxidativo. RESULTADOS: Foram incluídas 31 crianças com bronquiolite aguda com idade de três meses a dois anos e 37 crianças saudáveis. O estado oxidante total (EOT foi maior em pacientes com bronquiolite aguda do que no grupo de controle (5,16±1,99 µmol H2O2 em comparação a 3,78±1,78 µmol H2O2 [p = 0,004]. A capacidade antioxidante total (CAT foi significativamente menor em crianças com bronquiolite que no grupo de controle (2,51±0,37 µmol Trolox equivalente/L em comparação a 2,75±0,39 µmol Trolox Eqv/L (p = 0,013. Os pacientes com bronquiolite moderada apresentaram níveis de EOT mais elevados que os com bronquiolite leve e os do grupo de controle (p = 0,03, p < 0,001. Os pacientes com bronquiolite moderada apresentaram níveis de IEO mais elevados que os do grupo de controle (p = 0,015. O nível de saturação de oxigênio de pacientes com bronquiolite foi inversamente correlacionado ao nível de EOT (r = -0,476, p < 0,05. CONCLUSÃO: O equilíbrio entre os sistemas oxidante e antioxidante é interrompido em crianças com bronquiolite moderada, indicando que o fator de estresse poderá ter um papel na patogênese da doença.

  17. Esofagitis necrosante aguda: análisis retrospectivo Acute esophageal necrosis: a retrospective case series

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    R. Ramos

    2008-09-01

    Full Text Available Introducción: la esofagitis necrosante aguda es una entidad rara. Se reconoce por el aspecto negro difuso del esófago a la endoscopia. Su incidencia e patogénesis se desconoce. Pacientes y métodos: se analizaron retrospectivamente 11 pacientes con esofagitis necrosante aguda desde el punto de vista de los datos clínicos, de laboratorio y endoscopicos en 2 años. Resultados: se analizaron las endoscopias realizadas a 3.976 pacientes, observándose esofagitis necrosante aguda en 11 pacientes. El estado nutricional era malo en 6 pacientes. La resolución completa de la esofagitis se observó en cuatro pacientes. Durante el seguimiento se observó una estenosis en un paciente y un nuevo episodio de esofagitis necrosante aguda en otro paciente. Siete pacientes fallecieron, pero esta elevada mortalidad parece deberse a las enfermedades de base y no es atribuible a las lesiones de la esofagitis necrosante. Conclusiones: la incidencia de esofagitis necrosante aguda en nuestra serie fue 0,28%. La esofagitis necrosante aguda tiene una elevada mortalidad.Background: acute esophageal necrosis has been considered a rare event. It is defined as the presence of diffuse dark pigmentation of the esophagus on upper endoscopy. Its incidence has not yet been established. The pathogenesis remains unknown. Patients and methods: a retrospective analysis of clinical, laboratory, endoscopic, and histological data, and of the clinical course of 11 patients with acute necrotizing esophagitis was carried out over a 2-year period. Results: among 3,976 patients who underwent upper endoscopy, 11 (0.28% with acute esophageal necrosis were identified. Nutritional status was poor for 6 patients. Complete resolution of acute esophageal necrosis without further recurrence was observed in 4. One stricture appeared during follow-up and other patient developed new-onset acute esophageal necrosis. Seven patients died, but no death was directly related to acute esophageal necrosis

  18. Physiology of free radicals

    Directory of Open Access Journals (Sweden)

    Stevanović Jelka

    2011-01-01

    Full Text Available Free radicals imply that every atom, molecule, ion, group of atoms, or molecules with one or several non-paired electrons in outer orbital. Among these are: nitrogenoxide (NO•, superoxide-anion-radical (O2•-, hydroxyl radical (OH•, peroxyl radical (ROO•, alcoxyl radical (RO• and hydroperoxyl radical (HO2•. However, reactive oxygen species also include components without non-paired electrons in outer orbital (so-called reactive non-radical agents, such as: singlet oxygen (1O2, peroxynitrite (ONOO-, hydrogen-peroxide (H2O2, hypochloric acid (eg. HOCl and ozone (O3. High concentrations of free radicals lead to the development of oxidative stress which is a precondition for numerous pathological effects. However, low and moderate concentrations of these matter, which occur quite normally during cell metabolic activity, play multiple significant roles in many reactions. Some of these are: regulation of signal pathways within the cell and between cells, the role of chemoattractors and leukocyte activators, the role in phagocytosis, participation in maintaining, changes in the position and shape of the cell, assisting the cell during adaption and recovery from damage (e.g.caused by physical effort, the role in normal cell growth, programmed cell death (apoptosis and cell ageing, in the synthesis of essential biological compounds and energy production, as well as the contribution to the regulation of the vascular tone, actually, tissue vascularization.

  19. Orgasm after radical prostatectomy

    NARCIS (Netherlands)

    Koeman, M; VanDriel, MF; Schultz, WCMW; Mensink, HJA

    1996-01-01

    Objective To evaluate the ability to obtain and the quality of orgasm after radical prostatectomy, Patients and methods The orgasms experienced after undergoing radical prostatectomy were evaluated in 20 men (median age 65 years, range 56-76) using a semi-structured interview and a self-administered

  20. Sertralina e pancreatite aguda: relato de caso Sertraline and acute pancreatitis: a case-report

    Directory of Open Access Journals (Sweden)

    André Malbergier

    2004-03-01

    Full Text Available A pancreatite aguda é uma patologia grave e com considerável morbidade e mortalidade. Vários fatores são apontados como possíveis causas de pancreatite aguda. Neste relato, será apresentado um caso de pancreatite aguda com possível associação causal com um inibidor seletivo de recaptura de serotonina: sertralina. Após um mês de tratamento com sertralina, uma paciente do sexo feminino, 55 anos, desenvolveu forte dor abdominal e elevação da amilase sérica. Após internação e retirada da sertralina, seus sintomas remitiram e os níveis de amilase voltaram ao normal. Pela potencial gravidade do quadro e pelo amplo uso desta medicação, tal associação deve ser lembrada em investigações de casos de pancreatite aguda.Acute pancreatitis is a severe disease with considerable morbidity and mortality. Many risk factors are causally related to acute pancreatitis. In this report, a case of acute pancreatitis with possible causal relationship with the use of a selective serotonin reuptake inhibitor, sertraline, will be discussed. After one month of treatment with sertraline, a female patient, 55 years-old, developed a severe abdominal pain and showed a serum amylase elevation. She was admitted to the hospital and the use of sertraline was interrupted. After that, the symptoms remitted and the serum amylase level returned to normal. Because of the potential severity of this disease and the widespread use of sertraline, this association should be reminded when investigating possible causes for acute pancreatitis.

  1. Dor aguda no joelho do paciente idoso Acute knee pain in elderly patients

    Directory of Open Access Journals (Sweden)

    Gilberto Luís Camanho

    2008-09-01

    Full Text Available A dor aguda no joelho de pacientes idosos é freqüente, sendo caracterizada por seu aparecimento súbito, sem causa aparente, com exame radiográfico dentro dos padrões da normalidade, na maioria dos casos. A etiologia da dor aguda no joelho é decorrente de insuficiência das estruturas, e seu quadro clínico difere completamente daquele determinado pela osteoartrose, sendo sempre unilateral e ocorre na grande maioria em pacientes do sexo feminino, após a quinta década de vida, e na região medial do joelho (local de maior carga. Com o propósito de analisar as possíveis etiologias para a dor aguda do joelho de pacientes acima de 60 anos de idade, suas características e tratamento, os autores discutem as etiologias relacionadas à dor aguda: lesão meniscal, fratura por fadiga e osteonecrose idiopática.Acute knee pain in elderly patients is not uncommon, and is characterized by a sudden onset, no apparent cause, and by normal radiographic findings in most cases. The etiology of acute knee pain is the result of insufficient structures, and clinical symptoms are totally different from the symptoms seen in osteoarthrosis. This acute pain in the knee is always unilateral and in the medial region of the knee joint (site with the heaviest load, predominantly in females after the fifth decade of live. In order to consider the possible etiologies for acute knee joint pain in patients older than 60 years, its characteristics and treatment, the authors discuss etiologies related to acute pain: lesion of the meniscus, stress fracture, and idiopathic osteonecrosis.

  2. Necessidades básicas das esposas de pacientes infartados na fase aguda do tratamento

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    Edna Ikumi Umebayashi Takahashi

    1990-12-01

    Full Text Available Trata-se de um estudo exploratório que teve por finalidade as necessidades básicas das esposas de pacientes infartados, na fase aguda do tratamento. Foi utlizado como referencial para análise os conceitos de Nacessidades Básicas de MASLOW. Os resultados permitiram identificar como principais necessidades afetadas das esposas: segurança, amor e gregária, estima.

  3. Citarabina y reacciones cutáneas en leucemia aguda mieloide

    OpenAIRE

    Sofía Grille; Regina Guadagna; Matilde Boada; Victoria Irigoin; Mariana Stevenazzi; Cecilia Guillermo; Lilián Díaz

    2013-01-01

    La citarabina es un antimetabolito utilizado en el tratamiento de las leucemias agudas mieloides (LAM). Esta droga presenta numerosos efectos adversos (mielosupresión, toxicidad en sistema nervioso central, hepática, gastrointestinal, ocular y cutánea). La toxicidad dermatológica es habitualmente descrita como rara, sin embargo existen diferencias en la incidencia comunicada. Se realizó un estudio retrospectivo donde se incluyeron todas las LAM tratadas con quimioterapia que incluía citarabin...

  4. Porfiria aguda intermitente la importancia de ampliar la perspectiva del diagnóstico diferencial

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    Boris Espinoza Balderrama

    2012-12-01

    Full Text Available La porfiria aguda intermitente es un trastorno autosómico dominante, producido por deficiencia genética de porfobilinogeno desaminasa, enzima que participa en la biosíntesis del grupo hem, es una patología con elevada mortalidad, y poco observada en nuestro medio. En octubre del 2011, en el Hospital del Seguro Social Universitario se reportó un caso de porfiria aguda intermitente, paciente de 23 años, sexo femenino, ingresa con dolor abdominal agudo de gran intensidad a nivel de mesogastrio y síndrome miccional, durante su internación presento taquicardia, fiebre y leucocitosis sin focoinfeccioso aparente, llevando Insuficiencia renal aguda, acidosis metabólica y neuropatía periférica.Las sintomatología inespecífica plantea patologías quirúrgicas o médicas, que requieren análisis exhaustivo para la aproximación diagnostica, mediante prueba de fotosensibilidad en orina se sospecha el diagnóstico definitivo, la cual se confirmó con la determinación de porfirinas totales en sangre y en orina, de porfobilinógeno y de ácidodelta - aminolevulínico en orina realizada en Buenos Aires donde recibió tratamiento oportuno.

  5. Radical chemistry of artemisinin

    Energy Technology Data Exchange (ETDEWEB)

    Denisov, Evgenii T; Solodova, S L; Denisova, Taisa G [Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow Region (Russian Federation)

    2010-12-29

    The review summarizes physicochemical characteristics of the natural sesquiterpene peroxide artemisinin. The kinetic schemes of transformations of artemisinin radicals under anaerobic conditions are presented and analyzed. The sequence of radical reactions of artemisinin in the presence of oxygen is considered in detail. Special emphasis is given to the intramolecular chain oxidation resulting in the transformation of artemisinin into polyatomic hydroperoxide. The kinetic characteristics of elementary reaction steps involving alkyl, alkoxyl, and peroxyl radicals generated from artemisinin are discussed. The results of testing of artemisinin and its derivatives for the antimalarial activity and the scheme of the biochemical synthesis of artemisinin in nature are considered.

  6. Infarto esplénico secundario a pancreatitis aguda Splenic infarction secondary to acute pancreatitis

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    J. J. Arenal Vera

    2008-05-01

    Full Text Available Fundamento y objetivo: la estrecha relación anatómica del páncreas con los vasos esplénicos y el bazo es responsable de complicaciones esplénicas en el curso de la pancreatitis aguda. El objetivo es presentar dos casos clínicos de pancreatitis aguda grave que sufrieron infarto esplénico como complicación de la enfermedad pancreática. Pacientes, participantes: en un periodo de tres meses, dos pacientes fueron diagnosticados de infarto esplénico secundario a pancreatitis aguda. En ambos casos el diagnóstico y seguimiento evolutivo del infarto esplénico se hizo a través de tomografía axial computerizada. Resultados: en el primer paciente, las imágenes muestran de forma inequívoca la afectación de la arteria esplénica por el proceso inflamatorio pancreático. En el segundo, no se pudo demostrar afectación de los vasos esplénicos, por lo que la única posible explicación etiológica es un incremento de coagulabilidad intravascular. Conclusiones: sería recomendable añadir las complicaciones esplénicas al conjunto de complicaciones graves extrapancreáticas de la pancreatitis aguda. La tomografía axial computerizada es de gran utilidad para la detección y seguimiento de las complicaciones esplénicas de la pancreatitis aguda.Background and objective: the close anatomic relationship of the pancreas with the splenic vessels and the spleen is responsible for splenic complications in the course of acute pancreatitis. Our objective was to report two cases of severe acute pancreatitis complicated by splenic infarction. Patients: in a three-month period of time two patients were diagnosed with splenic infarction secondary to acute pancreatitis. In both cases splenic infarction diagnosis and follow-up were carried out using computed tomography. Results: in the first case images clearly showed a narrowing of the splenic artery due to the inflammatory pancreatic condition. In the second case no involvement of the splenic vessels could

  7. Radical cystectomy in eldery

    OpenAIRE

    Bančević Vladimir; Aleksić Predrag; Milović Novak; Spasić Aleksandar; Kovačević Božidar; Toševski Perica; Čampara Zoran; Milošević Radovan; Cerović Snežana

    2015-01-01

    Background/Aim. Radical cystectomy is the method of choice for the treatment of muscle invasive bladder cancer. This major surgery is associated with many complications, especially in older patients. The aim of this study was to analyze preoperative comorbidity, and intraoperative and postoperative complicatons in patients older than 75 years. Methods. This clinical, retrospective study included 46 patients over 75 years, who underwent radical cystectomy. I...

  8. Abdominal Radical Trachelectomy

    OpenAIRE

    Căpîlna, Mihai Emil; Ioanid, Nicolae; Scripcariu, Viorel; Gavrilescu, Madalina Mihaela; Szabo, Bela

    2014-01-01

    Objective Abdominal radical trachelectomy (ART) is one of the fertility-sparing procedures in women with early-stage cervical cancer. The published results of ART, in comparison with vaginal radical trachelectomy, so far are limited. Materials and Methods This retrospective study comprises all cases of female patients referred to ART with early-stage cervical cancer from 2 gynecologic oncology centers in Romania. Results A total of 29 women were referred for ART, but subsequently, fertility c...

  9. Effect of hyperthermia on experimental acute pancreatitis Efeito da hipertermia na pancreatite aguda experimental

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    José Luiz Jesus de Almeida

    2006-12-01

    Full Text Available BACKGROUD: Recent studies indicate that hyperthermia can change inflammatory mechanisms and protect experimental animals from deleterious effects of secretagogue-induced acute pancreatitis AIM: To evaluate the effects of hyperthermia post-treatment on cerulein-induced acute pancreatitis in rats METHODS: Twenty animals were divided in two groups: group I (n = 10, rats with cerulein-induced acute pancreatitis undergone hyperthermia, and group II (n = 10, animals with cerulein-induced acute pancreatitis that were kept normothermic. In all groups, amylase serum levels, histologic damage, vascular permeability and pancreatic water content were assessed. Acute pancreatitis was induced by administration of two cerulein injections (20 mcg/kg. A single dose of Evans' blue dye was administered along with the second dose of cerulein. All animals also received a subcutaneous injection of saline solution. After this process, animals undergone hyperthermia were heated in a cage with two 100 W lamps. Body temperature was increased to 39.5ºC and maintained at that level for 45 minutes. Normothermia rats were kept at room temperature in a second cage RESULTS: Control animals had typical edema, serum amylase activity and morphologic changes of this acute pancreatitis model. Hyperthermia post-treatment ameliorated the pancreatic edema, whereas the histologic damage and the serum amylase level remained unchanged CONCLUSIONS: The findings suggest a beneficial effect of the thermal stress on inflammatory edema in experimental acute pancreatitis.RACIONAL: Estudos recentes indicam que a hipertermia pode modificar mecanismos inflamatórios e proteger animais experimentais dos efeitos deletérios da pancreatite aguda induzida por secretagogos OBJETIVO: Avaliar a eficácia da hipertermia como tratamento da pancreatite aguda induzida por ceruleína em ratos MÉTODOS: Vinte animais foram divididos em dois grupos: grupo I (n = 10, ratos com pancreatite aguda induzida por

  10. Microcristais biliares na pancreatite aguda idiopática: indício para etiologia biliar oculta subjacente

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    CHEBLI Júlio Maria Fonseca

    2000-01-01

    Full Text Available As principais causas de inflamação pancreática no mundo são a litíase biliar e o alcoolismo crônico. Admite-se que 10 a 30% das pancreatites agudas sejam idiopáticas. Sugere-se que parte destas são causadas por microlitíase ou barro biliar, identificados pela presença de microcristais no sedimento biliar. Neste estudo, realizou-se análise microscópica da bile obtida por colangiopancreatografia endoscópica, em pacientes com pancreatite aguda idiopática, pancreatite aguda biliar e pancreatite crônica alcoólica - 20 em cada grupo. Pacientes com pancreatite aguda idiopática e microcristais na bile foram submetidos a colecistectomia. Naqueles inaptos à cirurgia efetuou-se esfincterotomia endoscópica ou tratamento com ácido ursodesoxicólico. Pacientes com pancreatite aguda idiopática sem cristais não receberam tratamento específico. A prevalência de microcristais biliares em pacientes com pancreatite aguda idiopática (75% e pancreatite aguda biliar (90% foi significativamente maior que naqueles com pancreatite crônica alcoólica (15%. A detecção de microcristais apresentou sensibilidade de 90%, especificidade de 85%, valor preditivo positivo de 85,7%, valor preditivo negativo de 89,4% e acurácia de 87,5% em identificar pancreatite de origem biliar. Nos pacientes com pancreatite aguda idiopática recurrente, cursando com microcristais, houve redução significante dos episódios de pancreatite após tratamento específico. No seguimento deste grupo durante 23,3 meses, recidiva ocorreu apenas naqueles que apresentavam "fator biliar persistente" (coledocolitíase ou microcristais. Todos os pacientes com pancreatite aguda idiopática submetidos a colecistectomia apresentavam colecistite crônica, e microlitíase foi observada em um paciente. No seguimento ultra-sonográfico, colelitíase foi detectada em um dos casos. No subgrupo de cinco pacientes com pancreatite aguda idiopática sem microcristais houve uma recidiva. Estudo

  11. Free Radical Reactions in Food.

    Science.gov (United States)

    Taub, Irwin A.

    1984-01-01

    Discusses reactions of free radicals that determine the chemistry of many fresh, processed, and stored foods. Focuses on reactions involving ascorbic acid, myoglobin, and palmitate radicals as representative radicals derived from a vitamin, metallo-protein, and saturated lipid. Basic concepts related to free radical structure, formation, and…

  12. Sexuality Following Radical Prostatectomy

    DEFF Research Database (Denmark)

    Fode, Mikkel; Serefoglu, Ege C; Albersen, Maarten;

    2016-01-01

    INTRODUCTION: Radical prostatectomies can result in urinary incontinence and sexual dysfunction. Traditionally, these issues have been studied separately, and the sexual problem that has received the most focus has been erectile dysfunction. AIM: To summarize the literature on sexually related side...... effects and their consequences after radical prostatectomy and focus on the occurrence and management of problems beyond erectile dysfunction. METHODS: The literature on sexuality after radical prostatectomy was reviewed through a Medline search. Original research using quantitative and qualitative...... methodologies was considered. Priority was given to studies exploring aspects of sexuality other than erectile function. MAIN OUTCOME MEASURES: The prevalence, predictive factors, and management of post-prostatectomy sexual problems beyond erectile dysfunction. RESULTS: Most patients will develop urinary...

  13. Gangs, Terrorism, and Radicalization

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    Scott Decker

    2011-01-01

    Full Text Available What can street gangs tell us about radicalization and extremist groups? At first glance, these two groups seem to push the boundaries of comparison. In this article, we examine the important similarities and differences across criminal, deviant, and extremist groups. Drawing from research on street gangs, this article explores issues such as levels of explanation,organizational structure, group process, and the increasingly important role of technology and the Internet in the context of radicalization. There are points of convergence across these groups, but it is important to understand the differences between these groups. This review finds little evidence to support the contention that American street gangs are becoming increasingly radicalized. This conclusion is based largely on organizational differences between gangs and terror groups.

  14. Comportamento da síndrome coronariana aguda: resultados de um registro brasileiro

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    Leopoldo Soares Piegas

    2013-06-01

    Full Text Available FUNDAMENTO: O Brasil carece de registros multicêntricos publicados de síndrome coronariana aguda. OBJETIVO: O Registro Brasileiro de Síndrome Coronariana Aguda é um estudo multicêntrico nacional com objetivo de apresentar dados representativos das características clínicas, e manejo e evolução hospitalares dessa síndrome. MÉTODOS: Participaram 23 hospitais de 14 cidades. Foram elegíveis pacientes que se apresentaram com suspeita de síndrome coronariana aguda nas primeiras 24 horas, com quadro clínico sugestivo, associado a alterações eletrocardiográficas compatíveis e/ou marcadores de necrose. O seguimento foi realizado até o óbito ou a alta hospitalar. RESULTADOS: Entre os anos de 2003 e 2008, foram incluídos 2.693 pacientes com diagnóstico de síndrome coronariana aguda, sendo 864 (32,1% mulheres. O diagnóstico final foi de angina instável para 1.141 (42,4% pacientes, com mortalidade de 3,06% deles; de infarto agudo do miocárdio sem supradesnível de ST para 529 (19,6% pacientes, com mortalidade de 6,8% deles; e de infarto agudo do miocárdio com supradesnível de ST para 950 (35,3% pacientes, com mortalidade de 8,1% deles; tiveram diagnóstico não confirmado 73 (2,7% pacientes, com mortalidade de 1,36% deles. A mortalidade global foi de 5,53%. O modelo de regressão logística múltipla identificou o gênero feminino (OR=1,45, o diabetes melito (OR=1,59, o índice de massa corporal (OR=1,27 e a intervenção coronariana percutânea (OR=0,70 como fatores de risco de óbito, para demografia e intervenções. Um modelo para óbito por complicações maiores identificou choque cardiogênico/Edema Agudo de Pulmão (OR=4,57, reinfarto (OR=3,48, acidente vascular cerebral (OR=21,56, sangramento grave (OR=3,33, parada cardiorrespiratória (OR=40,27 e classe funcional de Killip (OR=3,37. CONCLUSÃO: Os dados do Registro Brasileiro de Síndrome Coronariana Aguda não diferem de outros coletados fora do país. Seus achados poder

  15. Infección aguda por el VHB Acute infection by Hepatitis B Virus

    Directory of Open Access Journals (Sweden)

    F. Alegre

    2004-01-01

    Full Text Available El espectro clínico de la infección aguda por el virus de la hepatitis B es muy amplio, con cuadros que van desde una hepatitis anictérica y subclínica a una hepatitis ictérica aguda grave e incluso, en algunos casos, a una hepatitis fulminante. El diagnóstico depende en gran medida del grado de sospecha clínica de la hepatitis, estableciéndose el origen etiológico por el virus B mediante el estudio de marcadores serológicos y/o DNA en sangre. Aunque en la mayor parte de los casos la evolución de la hepatitis aguda por virus B es favorable, con resolución espontánea de la clínica en 4-8 semanas, no es infrecuente en ciertos casos, sobre todo en la infancia, la progresión a hepatitis crónica. No existe ningún tratamiento específico para la infección aguda por virus B que reduzca su gravedad o prevenga su evolución a hepatitis crónica. Se recomienda, no obstante, el reposo relativo, y la administración de una dieta hipercalórica. En las hepatitis agudas graves debe indicarse ingreso hospitalario; en casos de hepatitis fulminante ingreso en UCI para monitorización intensiva y valoración de trasplante hepático si no se produce mejoría espontánea. En el presente artículo se revisa, de forma breve y esquemática, la clínica, el diagnóstico, el pronóstico y el tratamiento de la infección aguda por el virus de la hepatitis B.The clinical spectrum of acute hepatitis B virus infection is very broad, with clinical manifestations that range from anicteric and sub-clinical hepatitis to severe acute icteric hepatitis and even, in some cases, to fulminant hepatitis. Diagnosis depends to a large extent on the degree of clinical suspicion of hepatitis, establishing the aetiological origin of the B virus through the study of serological markers and/or DNA in the blood. Although in the majority of cases there is a favourable evolution of acute hepatitis B virus infection, with spontaneous resolution of the clinical manifestations

  16. Apendicite aguda isquêmica em coelhos: novo modelo com estudo histopatológico

    Directory of Open Access Journals (Sweden)

    Nunes Fernando Costa

    2005-01-01

    Full Text Available OBJETIVOS: Avaliar a isquemia parcial ou total, através da ligadura com fio inabsorvível dos vasos do mesoapêndice do apêndice vermiforme de coelhos, bem como a obstrução mecânica, através da ligadura com fio inabsorvível da base do apêndice vermiforme, a 1 cm do ceco. Avaliar a histologia do apêndice ( normal e acometido . Estudar a flora bacteriana residente no apêndice vermiforme ( normal e acometido e do exsudato peritoneal. MÉTODOS: Foram utilizados 72 coelhos ( "Oryctogalus cuniculos" , machos da linhagem Nova Zelândia, com peso médio de 3,000 gramas. Foram divididos em grupos: piloto ( A , flora bacteriana ( B , controle ( H e experimento ( C, D, E, F e G com períodos de observação de 96 horas e 192 horas. Fez-se a ligadura dos vasos do mesoapêndice, com fio inabsorvível nos grupos ( D, E, F e G e da base do apêndice vermiforme a 1 cm do ceco, no grupo ( C . No grupo experimento (D,E,F e G foi praticado o modelo isquêmico. No grupo experimento ( C foi realizada a obstrução mecânica e no grupo controle ( H foi feita somente a simulação da cirurgia. RESULTADOS: No grupo controle ( H , não ocorreu apendicite aguda. No grupo experimento ( C,D,E,F, e G ocorreu apendicite aguda. CONCLUSÃO: O procedimento utilizado causa apendicite aguda com alterações anatomopatológicas distintas. A bactéria residente encontrada na flora fisiológica do suco entérico do apêndice vermiforme e no exsudato peritoneal foi a Escherichia coli.

  17. Estudio de la recurrencia de la pancreatitis aguda litiàsica

    OpenAIRE

    Romaguera Monzonís, Andreu

    2012-01-01

    OBJETIVOS La pancreatitis aguda litiásica (PAL) es una enfermedad con tendencia a recurrir. La colecistectomía precoz (durante el mismo ingreso o antes de las dos semanas) o en determinados casos la CREP están recomendadas en la mayoría de guías clínicas, para evitar la recurrencia. Pero, el porcentaje de recurrencia y el intervalo de aparición de la misma no se conocen con exactitud. Nuestros objetivos son: 1) Determinar el porcentaje de recurrencia en nuestro entorno tras un primer episodio...

  18. Classificação de gravidade na pancreatite aguda Classification of severity of acute pancreatitis

    OpenAIRE

    Tercio De Campos; José Gustavo Parreira; José Cesar Assef; Sandro Rizoli; Barto Nascimento; Gustavo Pereira Fraga

    2013-01-01

    De acordo com a Classificação de Atlanta a pancreatite aguda pode ser dividida, baseado em sua severidade, em uma forma leve ou grave. Uma série de aspectos têm sido discutidos nos últimos anos, tais como, quantas categorias de gravidade devem ser consideradas; se o doente com falência orgânica é igual ao doente com necrose infectada; qual o papel da falência orgânica transitória; e como avaliar a falência orgânica. A reunião de revista"Telemedicina Baseada em Evidência - Cirurgia do Trauma e...

  19. Hepatite aguda colestática pelo propiltiouracil: relato de caso

    OpenAIRE

    Mônica Beatriz PAROLIN; Lopes, Reginaldo Werneck; José Ederaldo Queiroz TELLES; Ioshii, Sergio Ossamu, 1960-; Nemer HAJAR

    2000-01-01

    Propiltiouracil é uma droga amplamente utilizada no tratamento do hipertiroidismo. A hepatotoxicidade é um dos efeitos colaterais mais raros e também mais graves associados a ela. Relata-se um caso de hepatite aguda colestática que acomete um jovem de 15 anos em uso de propiltiouracil para tratamento de hipertiroidismo. Causas virais, metabólicas e autoimunes foram excluídas e a biopsia hepática revelou achados histopatológicos sugestivos de hepatite colestática induzida por droga. Com a susp...

  20. Inmunofenotipos aberrantes en leucemias agudas en una población hospitalaria de Buenos Aires

    Directory of Open Access Journals (Sweden)

    Viviana Novoa

    2013-02-01

    Full Text Available La citometría de flujo multiparamétrica es el método de elección para la caracterización inmunofenotípica de las células hematopoyéticas clonales presentes en los distintos procesos leucémicos agudos. El objetivo fue analizar la expresión de antígenos de membrana y evaluar la presencia de fenotipos aberrantes en los blastos de pacientes con diagnóstico de leucemia aguda, que permiten el monitoreo de la respuesta al tratamiento. Se revisaron los inmunofenotipos de 364 muestras de pacientes adultos derivadas a nuestro laboratorio en un período de 7 años. El inmunofenotipo se realizó por citometría de flujo con un amplio panel de anticuerpos monoclonales con el que se evaluó la expresión de antígenos de linaje linfoide, mieloide y también antígenos de maduración. De las 364 muestras estudiadas, 60.2% presentaron un fenotipo compatible con leucemia mieloide aguda (LMA, 28.8% con leucemia linfoblástica B (LLA-B, 6.6% con leucemia linfoblástica T (LLA-T y 4.4% con leucemias agudas poco frecuentes. La presencia de fenotipos aberrantes se observó en 89% de los casos, los fenotipos aberrantes identificados fueron: 1 infidelidad de linaje: LMA (54%, LLA-B (40%, LLA-T (29%; 2 ausencia de expresión antigénica: LMA (21%, LLA-B (35%, LLA-T (70%; 3 alteración de la expresión antigénica: LMA (67%, LLA-B (66%, LLA-T (84%; 4 asincronismo madurativo: LMA (26%, LLA-B (37% y 5 fenotipo ectópico: LLA-T 96%. El análisis por citometría de flujo multiparamétrica de las leucemias agudas permitió la identificación de fenotipos aberrantes en la mayoría de nuestros pacientes, que son de utilidad para el monitoreo de la respuesta al tratamiento.

  1. Pruebas de funcionalismo hepático en pacientes con infección viral aguda

    OpenAIRE

    Yraima Lucia Larreal Espina; Edibel Lisett Andrade Zambrano; Yarenny Enmita Cuevas Ruiz; Andrea Shirley Mendoza Rico; Milagros del Valle Montiel Aguilar; Alegría Cecilia Levy Guiffrida; Nereida Josefina Valero Cedeño

    2012-01-01

    Las hepatitis víricas son producidas principalmente por virus de las hepatitis; sin embargo, otros virus han sido asociados a esta entidad clínica. Con el objeto de estudiar estas alteraciones hepáticas se estudiaron 130 pacientes con síntomas de infección viral aguda. Se les realizó una historia clínica y sus muestras de suero fueron procesadas por técnicas inmunoen-zimáticas y espectrofotométrícas para la determinación de anticuerpos específicos de los distintos virus y para pruebas de func...

  2. Bronquiolite aguda, uma revisão atualizada Acute bronchiolitis, an updated review

    OpenAIRE

    Werther Brunow de Carvalho; Cíntia Johnston; Marcelo Cunio Fonseca

    2007-01-01

    A bronquiolite aguda (BA) é um diagnóstico freqüente de internação hospitalar em pediatria, ocasionada principalmente pelo vírus sincicial respiratório (VSR). Ocorre epidemicamente nos meses de outono e inverno. Algumas populações de crianças (recém-nascidos pré-termo, cardiopatia congênita, doença pulmonar crônica, imunocomprometidos, desnutridos, entre outros) apresentam maior risco de morbidade e mortalidade. Os vírus multiplicam-se nas células epiteliais ciliadas, e a inflamação e os debr...

  3. Injúria Renal Aguda no paciente politraumatizado Acute Renal Injury in polytrauma patients

    OpenAIRE

    Thiago Gomes Romano; Paulo Fernando Guimarães Morando Marzocchi Tierno

    2013-01-01

    A Injúria Renal Aguda (IRA) no contexto do paciente politraumatizado ocorre, na maioria das vezes, por uma conjuntura de fatores que passam por eventos correlacionados à ressuscitação volêmica inicial, ao grau de resposta inflamatória sistêmica associada ao trauma, ao uso de contraste iodado para procedimentos diagnósticos, à rabdomiólise e à síndrome compartimental abdominal. Atualmente, passamos por uma fase de uniformização dos critérios diagnósticos da IRA com o Acute Kidney Injury Networ...

  4. Mielitis aguda necrotizante en un paciente con Sida Acute necrotizing myelitis in an AIDS patient

    OpenAIRE

    Corti, M.; I Soto; M. F. Villafañe; B. Bouzas; Duarte, J. M.; C. Yampolsky; R. Schtirbu

    2003-01-01

    Como consecuencia de la infección por el virus de la inmunodeficiencia humana tipo-1 (HIV-1), otros patógenos como citomegalovirus (CMV) y herpes simple tipo 1-2 (HSV 1-2) pueden comprometer tanto el sistema nervioso central como el periférico. Estos agentes pueden involucrar también a la médula espinal y causar una mielitis aguda necrotizante. Esta complicación ocurre por lo general en pacientes con enfermedad HIV/sida avanzada y marcada inmunodeficiencia, con recuentos de linfocitos T CD4+ ...

  5. Rinovirus: Frecuencia en niños con infección respiratoria aguda, no internados

    OpenAIRE

    Débora N. Marcone; Carmen Ricarte; Cristina Videla; Jorge Ekstrom; Guadalupe Carballal; Santiago Vidaurreta; Marcela Echavarría

    2012-01-01

    Los métodos moleculares para diagnosticar rinovirus humanos (RVH) han aumentado la sensibilidad de detección. Esto ha permitido documentar la asociación entre los RVH y las infecciones respiratorias agudas (IRA) altas y bajas. La infección por RVH durante la infancia se asoció con posterior desarrollo de asma. Se estudió la frecuencia de RVH en 186 niños menores de 6 años ambulatorios con IRA (alta o baja), durante 2 años consecutivos (1/6/2008 - 31/5/2010). Se correlacionó la presencia de RV...

  6. Tratamiento adaptado al riesgo de la leucemia promielocítica aguda con ATRA y quimioterapia

    OpenAIRE

    Montesinos Fernández, Pau

    2016-01-01

    El tratamiento actual de la leucemia promielocítica aguda (LPA) con la combinación de ácido trans-retinóico (ATRA) y quimioterapia proporciona una tasa muy elevada de curaciones. No obstante, aunque estrecho, hay un margen de mejora mediante la reducción de cada una de las diferentes causas de fracaso terapéutico. Dada la heterogeneidad de estas causas de fracaso, planteamos la hipótesis de que un análisis de dichas causas y la identificación de las variables ligadas al paciente, a su enferm...

  7. Inmunofenotipos aberrantes en leucemias agudas en una población hospitalaria de Buenos Aires

    OpenAIRE

    Viviana Novoa; Neri A. Núñez; Orlando G. Carballo; Carmen F. Lessa

    2013-01-01

    La citometría de flujo multiparamétrica es el método de elección para la caracterización inmunofenotípica de las células hematopoyéticas clonales presentes en los distintos procesos leucémicos agudos. El objetivo fue analizar la expresión de antígenos de membrana y evaluar la presencia de fenotipos aberrantes en los blastos de pacientes con diagnóstico de leucemia aguda, que permiten el monitoreo de la respuesta al tratamiento. Se revisaron los inmunofenotipos de 364 muestras de pacientes adu...

  8. Caracterización molecular de las leucemias mieloides agudas de novo

    OpenAIRE

    Ibáñez Company, María Amparo

    2013-01-01

    La secuenciación es la técnica de elección para identificar mutaciones. Sin embargo, tiene un coste elevado, es laboriosa y su sensibilidad es limitada. Recientemente, el nuevo método de análisis de alta resolución con curvas de fusión (High Resolution Melt, HRM) permite detectar de forma rápida y específica mutaciones, polimorfismos y cambios epigenéticos. La leucemia mieloide aguda (LMA) son enfermedades heterogéneas con distintos comportamientos clínicos. El 40-50% de los pacientes no p...

  9. Resultados del tratamiento de leucemia linfoblástica aguda en niños.

    OpenAIRE

    Margarita Quintero de Charry

    2009-01-01

    El objetivo general de este estudio fue evaluar los resultados de las fases de inducción, consolidación y reinducción del tratamiento de la leucemia linfoblástica aguda (LLA), utilizado en el Hospital Universitario del Valle (HUV), durante el período comprendido entre enero, 1993 y abril, 1999. Se estudiaron 2 grupos de niños con LLA: 52 de bajo riesgo y 57 de alto riesgo. Se asignaron a diferentes protocolos de quimioterapia, de acuerdo con los criterios de clasificación de riesgo establecid...

  10. Aspectos disautonômicos da porfiria aguda intermitente: a propósito de seis casos

    Directory of Open Access Journals (Sweden)

    Charles P. Tilbery

    1979-06-01

    Full Text Available Foram estudados seis casos de porfiria aguda intermitente, sendo enfocados os aspectos disautonômicos apresentados durante a longa permanência hospitalar dos doentes (média de 64 dias. Foram observados taquicardia sinusal e hipertensão arterial (4 casos, parada cardíaca (3 casos e depressão respiratória (5 casos. Os autores tecem comentários a propósito da fisiopatologia destas alterações e chamam a atenção sobre o prognóstico sombrio da porfiria aguda intermitente.

  11. Radically enhanced molecular recognition

    KAUST Repository

    Trabolsi, Ali

    2009-12-17

    The tendency for viologen radical cations to dimerize has been harnessed to establish a recognition motif based on their ability to form extremely strong inclusion complexes with cyclobis(paraquat-p-phenylene) in its diradical dicationic redox state. This previously unreported complex involving three bipyridinium cation radicals increases the versatility of host-guest chemistry, extending its practice beyond the traditional reliance on neutral and charged guests and hosts. In particular, transporting the concept of radical dimerization into the field of mechanically interlocked molecules introduces a higher level of control within molecular switches and machines. Herein, we report that bistable and tristable [2]rotaxanes can be switched by altering electrochemical potentials. In a tristable [2]rotaxane composed of a cyclobis(paraquat-p-phenylene) ring and a dumbbell with tetrathiafulvalene, dioxynaphthalene and bipyridinium recognition sites, the position of the ring can be switched. On oxidation, it moves from the tetrathiafulvalene to the dioxynaphthalene, and on reduction, to the bipyridinium radical cation, provided the ring is also reduced simultaneously to the diradical dication. © 2010 Macmillan Publishers Limited. All rights reserved.

  12. Violent Radicalization in Europe

    DEFF Research Database (Denmark)

    Dalgaard-Nielsen, Anja

    2010-01-01

    When, why, and how do people living in a democracy become radicalized to the point of being willing to use or directly support the use of terrorist violence against fellow citizens? This question has been at the center of academic and public debate over the past years as terrorist attacks...

  13. Homegrown religious radicalization

    DEFF Research Database (Denmark)

    Khawaja, Iram

    and their families. Existing literature and ways of thinking about the social psychological process of radicalization will be reviewed, such as social identity theory and transformative learning theory, and a theoretical framework based on a focus on belonging, recognition and the sense of community will be proposed...

  14. Radical School Reform.

    Science.gov (United States)

    Gross, Beatrice, Ed.; Gross, Ronald, Ed.

    This book provides a comprehensive examination of the nature of the school crisis and the ways in which radical thinkers and educators are dealing with it. Excerpts from the writings of Jonathan Kozol, John Holt, Kenneth Clark, and others are concerned with the realities of education in ghettos and suburbs. Paul Goodman, Marshall McLuhan, Sylvia…

  15. Radical Financial Innovation

    OpenAIRE

    Robert J. Shiller

    2004-01-01

    Radical financial innovation is the development of new institutions and methods that permit risk management to be extended far beyond its former realm, covering important new classes of risks. This paper compares past such innovation with potential future innovation, looking at the process that produced past success and the possibilities for future financial innovation.

  16. On Radical Feminism

    Institute of Scientific and Technical Information of China (English)

    翟良锴

    2015-01-01

    <正>All men are created equal.For centuries,human have been struggling for their rights.Women,as a special social force,are fighting vigorously for their equal rights with men.According to an introduction to feminism,there are three main types of feminism:socialist,reformist and radical(Feminism 101).In order

  17. Free radical transfer in polymers

    International Nuclear Information System (INIS)

    For the present study of free-radical transfer in polymers pulse radiolysis and product studies have been carried out in aqueous solutions using thus far only the water-soluble polymers polyacrylic acid, polymethacrylic acid and polyvinyl alcohol. When OH radicals, generated in the radiolysis of N2O-saturated aqueous solutions, react with polymers the lifetime of the polymer radical thus created very much depends on the number of radicals per polymer chain. When there are a large number of radicals per chain their bimolecular decay may be faster than the corresponding (diffusion controlled) decay of monomeric radicals, but when the macromolecule contains only few or even just one radical their lifetime is considerably prolonged. Highly charged polymers such as polyacrylic acid at high pH attain a rod-like conformation which again favors a long lifetime of the radicals. Under such conditions, radical transfer reactions can occur. For example, in polyacrylic acid OH radicals generate two kinds of radicals side by side. The radical in β-position to the carboxylate group converts into the thermodynamically more stable α-radicals by an H-transfer reaction as can be followed by spectrophotometry. Besides radical transfer reactions β-fragmentation reactions occur causing chain scission. Such reactions can be followed in a pulse radiolysis experiment by conductometry, because counter ions are released upon chain scission. Such a process is especially effective in the case of polymethacrylic acid, where it results in a chain depolymerization. An intramolecular H-abstraction is also observed in the γ-radiolysis of polyacrylic acid with the corresponding peroxyl radicals. This causes a chain reaction to occur. The resulting hydroperoxides are unstable and decarboxylate given rise to acetylacetone-like products. In polyvinyl alcohol the peroxyl radicals in α-position to the alcohol function undergo HO2-elimination. This prevents a scission of the polymer chain in the

  18. Mielopatia transversa em adulto portador de leucemia aguda linfoblástica: relato de caso

    Directory of Open Access Journals (Sweden)

    Brito José Correia de Farias

    2001-01-01

    Full Text Available Relatamos um caso de mielopatia transversa aguda em paciente masculino de 31 anos de idade, branco, portador de leucemia aguda linfoblástica, subtipo L3 (LLA-L3. Esta é uma forma grave de leucemia e compromete mais crianças em relação aos adultos. Menos de 1% dos pacientes leucêmicos apresentam complicações espinais. No paciente em estudo, a sintomatologia instalou-se de modo abrupto e com as seguintes características: dores nas costas, paraplegia crural flácida e perda das funções sensitivas e vegetativas abaixo do segmento afetado. O diagnóstico etiológico foi estabelecido após a realização dos seguintes exames: hemograma, mielograma, análise do líquido cefalorraqueano e ressonância magnética de coluna dorsal. Foi instituído tratamento específico, que não interferiu com a evolução fatal da doença.

  19. Intoxicación aguda por plaguicidas en edades pediátricas. Guatemala, 2011

    Directory of Open Access Journals (Sweden)

    Mario Enrique Pla Acevedo

    2015-11-01

    Full Text Available Se realizó un estudio descriptivo retrospectivo de la Intoxicación Aguda por plaguicidas en edades pediátricas en Guatemala, que abarcó el  período de enero hasta diciembre del 2011. La muestra estuvo comprendida por 457 pacientes en edades pediátricas. Se analizaron las variables: edad y sexo, actividad que realizaba en el momento de la intoxicación, tipo de plaguicida, severidad, utilización de equipos de protección y lugar de asistencia médica. Las variables para el análisis de los indicadores fueron obtenidas por el Centro Nacional de Epidemiología. Como resultados fundamentales se observó que la Intoxicación Aguda por plaguicidas afectó principalmente al grupo de edades entre 17 y 19 años. El sexo masculino fue el más perjudicado, el mayor porciento de afectados, según causa, fue accidente de trabajo, con un 68% del total de casos; el tipo de plaguicida más utilizado que provocó intoxicación fue el paraquat; predominó la forma severa en los que no usaron medios de protección y el  lugar de atención médica y de notificación correspondió al hospital.

  20. CONOCIMIENTOS Y PRÁCTICAS DE INFECCIONES RESPIRATORIAS Y ENFERMEDADES DIARREICAS AGUDAS EN MADRES DE UNA COMUNIDAD DE PIURA, PERÚ

    Directory of Open Access Journals (Sweden)

    Mario J. Valladares Garrido

    2016-07-01

    Full Text Available Objetivo: Determinar conocimientos y prácticas frente a enfermedades diarreicas agudas (IRAS y las infecciones respiratorias agudas (EDAS antes y después de una intervención educativa. Material y Métodos: Se realizó un estudio de intervención en un centro de salud de Piura aplicando un cuestionario a 60 madres, el cual estuvo constituido por 40 preguntas y dividido en 4 secciones: datos sociodemográficos maternos y del niño, signos de alarma y prácticas de IRAS y EDAS, y conocimiento sobre IRAS. Resultados: De 60 madres participantes del estudio, la mayoría presentó un deficiente conocimiento sobre IRAS (75%. Los signos de alarma menos reconocidos antes de la intervención fueron la presencia de sangre en deposiciones (11,7%, beber mal o no poder beber (13,3% y tiraje subcostal (8,3% y silbido de pecho (15%. Los signos más reconocidos post intervención fueron respiración rápida (86,7%, diarreas acuosas (88,3% y ojos hundidos (83,3%. Conclusión: Se presentó poco reconocimiento de los signos de alarma de IRAS y EDAS en las madres antes de la intervención educativa. Palabras clave: conocimientos, prácticas, infecciones respiratorias agudas, enfermedades diarreicas agudas. (DeCS

  1. Radical substitution with azide

    DEFF Research Database (Denmark)

    Pedersen, Christian Marcus; Marinescu, Lavinia Georgeta; Bols, Mikael

    2005-01-01

    and the substrate. A primary deuterium kinetic isotope effect was found for the azidonation of benzyl ethers both with TMSN3-PhI(OAc)2 and with IN3. Also a Hammett free energy relationship study of this reaction showed good correlation with sigma+ constants giving with rho-values of -0.47 for TMSN3-PhI(OAc)2 and -0.......39 for IN3. On this basis a radical mechanism of the reaction was proposed....

  2. THERMOCHEMISTRY OF HYDROCARBON RADICALS

    Energy Technology Data Exchange (ETDEWEB)

    Kent M. Ervin, Principal Investigator

    2004-08-17

    Gas phase negative ion chemistry methods are employed to determine enthalpies of formation of hydrocarbon radicals that are important in combustion processes and to investigate the dynamics of ion-molecule reactions. Using guided ion beam tandem mass spectrometry, we measure collisional threshold energies of endoergic proton transfer and hydrogen atom transfer reactions of hydrocarbon molecules with negative reagent ions. The measured reaction threshold energies for proton transfer yield the relative gas phase acidities. In an alternative methodology, competitive collision-induced dissociation of proton-bound ion-molecule complexes provides accurate gas phase acidities relative to a reference acid. Combined with the electron affinity of the R {center_dot} radical, the gas phase acidity yields the RH bond dissociation energy of the corresponding neutral molecule, or equivalently the enthalpy of formation of the R{center_dot} organic radical, using equation: D(R-H) = {Delta}{sub acid}H(RH) + EA(R) - IE(H). The threshold energy for hydrogen abstraction from a hydrocarbon molecule yields its hydrogen atom affinity relative to the reagent anion, providing the RH bond dissociation energy directly. Electronic structure calculations are used to evaluate the possibility of potential energy barriers or dynamical constrictions along the reaction path, and as input for RRKM and phase space theory calculations. In newer experiments, we have measured the product velocity distributions to obtain additional information on the energetics and dynamics of the reactions.

  3. [Radical prostatectomy - pro robotic].

    Science.gov (United States)

    Gillitzer, R

    2012-05-01

    Anatomical radical prostatectomy was introduced in the early 1980s by Walsh and Donker. Elucidation of key anatomical structures led to a significant reduction in the morbidity of this procedure. The strive to achieve similar oncological and functional results to this gold standard open procedure but with further reduction of morbidity through a minimally invasive access led to the establishment of laparoscopic prostatectomy. However, this procedure is complex and difficult and is associated with a long learning curve. The technical advantages of robotically assisted surgery coupled with the intuitive handling of the device led to increased precision and shortening of the learning curve. These main advantages, together with a massive internet presence and aggressive marketing, have resulted in a rapid dissemination of robotic radical prostatectomy and an increasing patient demand. However, superiority of robotic radical prostatectomy in comparison to the other surgical therapeutic options has not yet been proven on a scientific basis. Currently robotic-assisted surgery is an established technique and future technical improvements will certainly further define its role in urological surgery. In the end this technical innovation will have to be balanced against the very high purchase and running costs, which remain the main limitation of this technology.

  4. Importancia de la producción local de reactantes de fase aguda mayores en la patogenia de la enfermedad pulmonar obstructiva crónica

    OpenAIRE

    Rojano Broz, Belén

    2016-01-01

    Falta palabras clave Los reactantes de fase aguda (RFA) mayores, proteína C reactiva (PCR) y amiloide A sérico (AAS), tiene un papel relevante durante la reacción aguda del organismo ante diversos estímulos nocivos. La inducción de la expresión de estas moléculas (PCR y AAS), cuya concentración se multiplica por 1000 durante una agresión aguda, se realiza principalmente a nivel hepático a través de un complejo sistema de interacción mediado por diversas citoquinas entre las que tiene...

  5. Indicaciones y resultados de la colecistostomía percutánea como opción terapéutica en la colecistitis aguda

    OpenAIRE

    Molina Rodríguez, José Luis

    2013-01-01

    Introducción La colecistitis, una enfermedad resultante de las complicaciones de la colelitiasis, puede ocurrir en dos maneras: aguda o crónica. La colecistitis aguda requiere un tratamiento urgente, normalmente con antibióticos seguidos de colecistectomía. Si la colecistectomía urgente no puede realizarse, la operación puede diferirse hasta que esté resuelto el episodio agudo y realizarse entonces de manera electiva (1). La causa más frecuente de la colecistitis aguda es la impactación...

  6. Pancreatitis aguda secundaria a hipertrigliceridemia: presentación de dos casos clínicos Acute pancreatitis secondary to hypertriglyceridemia: A report of two cases

    OpenAIRE

    S. J. Jiménez Forero; D. X. Roa Saavedra; M. C. Villalba

    2008-01-01

    La pancreatitis aguda es un proceso inflamatorio reversible. La hipertrigliceridemia como etiología de la pancreatitis aguda varía entre un 1,3 y un 11%, de acuerdo a la literatura, cuando los niveles de triglicéridos alcanzan valores por encima de 1.000 mg/dl; sin embargo, la hipertrigliceridemia se observa en un 12 a un 39% de las pancreatitis agudas como factor asociado. El objetivo del tratamiento médico es aumentar la actividad de la lipoproteinlipasa y aumentar la degradación de los qui...

  7. Catalysis of Radical Reactions: A Radical Chemistry Perspective.

    Science.gov (United States)

    Studer, Armido; Curran, Dennis P

    2016-01-01

    The area of catalysis of radical reactions has recently flourished. Various reaction conditions have been discovered and explained in terms of catalytic cycles. These cycles rarely stand alone as unique paths from substrates to products. Instead, most radical reactions have innate chains which form products without any catalyst. How do we know if a species added in "catalytic amounts" is a catalyst, an initiator, or something else? Herein we critically address both catalyst-free and catalytic radical reactions through the lens of radical chemistry. Basic principles of kinetics and thermodynamics are used to address problems of initiation, propagation, and inhibition of radical chains. The catalysis of radical reactions differs from other areas of catalysis. Whereas efficient innate chain reactions are difficult to catalyze because individual steps are fast, both inefficient chain processes and non-chain processes afford diverse opportunities for catalysis, as illustrated with selected examples.

  8. Estudio preliminar de la toxicidad aguda del sulfato y del cloruro de berberina

    Directory of Open Access Journals (Sweden)

    Edward J. Acero M.

    2010-07-01

    Full Text Available Se realizaron ensayos para determinar la Toxicidad Aguda (LD50 del Sulfato de Berberina en Hámster dorado administrado tópicamente, y del Cloruro de Berberina administrado vía subcutánea. No se halló LD 50 para el Sulfato de Berberina, y la evaluación hemática de Colesterol, Urea y transaminasas ALAT y ASAT no presentó modificaciones. El Cloruro de Berberina manifestó una LD 50/24 horas de 640 mg/kg.; también acción hipoglicémica y a nivel de SNC hubo acción depresora. La evaluación histológica de hígado y piel para cada una de las presentaciones permitió establecer normalidad.

  9. Crisis aguda de Asma Bronquial. Diagnóstico y tratamiento estandarizado

    OpenAIRE

    Anelia de la Caridad Rojas-Pérez; Andrés Andrés-atos; Dalila Chacón-Bonet; Mariela Parra-Cruz

    2013-01-01

    Se realizó un estudio prospectivo de intervención en 150 pacientes con diagnóstico de Asma Bronquial que acudieron con crisis aguda al Servicio de Urgencias del Hospital Pediátrico de Holguín, de Enero del 2009 hasta Diciembre del 2010; para evaluar la evolución de los mismos después de la aplicación de Guías de Buenas Prácticas. Se aplicó tratamiento a los pacientes según lo establecido, observando su respuesta. Predominó el grupo de 4 a 8 años del sexo masculino, el 52 % de los pacientes pr...

  10. INSUFICIENCIA RENAL AGUDA EN EL ANCIANO. CONSIDERACIONES ACERCA DE SU VALORACIÓN Y TRATAMIENTO.

    OpenAIRE

    Musso CG

    2005-01-01

    RESUMEN:La insuficiencia renal aguda (IRA) es un trastorno frecuente en los ancianos a raíz de la senescencia renal, la menor metabolización de los fármacos y la mayor exposición a la polifarmacia y enfermedades sistémicas que ellos padecen. Las siguientes son las principales características de la IRA en el anciano: carácter multifactorial, presentación clínica atípica, fragilidad tubular, patrón de síndrome intermedio y poca fiabilidad del examen físico y de los índices urinarios en la inter...

  11. Variables asociadas a necrosis pancreática en pacientes con Pancreatitis Aguda Grave.

    OpenAIRE

    Durbán Serrano, Lucía; Vilaseca Momplet, Jaume; Benlloch Pérez, Salvador

    2012-01-01

    Hem fet un estudi retrospectiu de 73 adults amb pancreatitis aguda greu recollint variables analítiques i radiològiques a l'ingrés i a les 48h i relacionant-les amb l'existència de necrosi pancreàtica a la TC. Les variables relacionades amb la necrosi van ser: edat, leucòcits, VSG, TP, INR, glucèmia, urea, creatinina, proteïnes, albúmina, LDH, calci, PCR i presència de vessament pleural a la Rx. D'aquestes, el vessament pleural a l'ingrés i la hipoalbuminemia, les xifres altes de LDH i PCR a ...

  12. Diagnóstico laboratorial das leucemias linfóides agudas

    OpenAIRE

    Farias Mariela Granero; Castro Simone Martins de

    2004-01-01

    A leucemia linfóide aguda (LLA) é a forma mais comum de câncer na infância, compreendendo 70% dos casos; em adultos a incidência é de apenas 20%. A abordagem inicial do diagnóstico consiste no exame citomorfológico do sangue periférico e da medula óssea. O estudo imunofenotípico eleva para 99% o percentual de casos corretamente classificados, permitindo identificar a linhagem celular (T ou B) e os diferentes estágios de maturação da célula. Aproximadamente 20% dos casos são de origem de célul...

  13. Ataxia cerebelar aguda na criança Acute cerebellar ataxia in children

    Directory of Open Access Journals (Sweden)

    Valeriana Moura Ribeiro

    1968-03-01

    Full Text Available São relatados os casos de 6 crianças com ataxia cerebelar aguda. Admitem os autores a presença de um fator etiológico de caráter viral comum a todos êles, discutindo os mecanismos patogênicos com base nos casos da literatura. A evolução foi favorável em todos os pacientes, com regressão completa da sintomatologia, dentro do período de 6 a 60 dias.Clinical observations of 6 children with acute cerebellar ataxia and respective laboratorial data are reported. Considerations are made in order to support the hypothesis of involving virus. The evolution of the disorder was a nonfatal one and the patients regained normal cerebellar function within a period of 6 to 60 days.

  14. Crisis aguda de Asma Bronquial. Diagnóstico y tratamiento estandarizado

    Directory of Open Access Journals (Sweden)

    Anelia de la Caridad Rojas-Pérez

    2013-01-01

    Full Text Available Se realizó un estudio prospectivo de intervención en 150 pacientes con diagnóstico de Asma Bronquial que acudieron con crisis aguda al Servicio de Urgencias del Hospital Pediátrico de Holguín, de Enero del 2009 hasta Diciembre del 2010; para evaluar la evolución de los mismos después de la aplicación de Guías de Buenas Prácticas. Se aplicó tratamiento a los pacientes según lo establecido, observando su respuesta. Predominó el grupo de 4 a 8 años del sexo masculino, el 52 % de los pacientes presentaron crisis ligeras, buena respuesta al uso de broncodilatadores en aerosol, se aplicó la Prednisona por vía oral en la mayoría de los casos que lo requirieron, el 68,7 % realizó tratamiento domiciliario con respuestas controladas y solo en el 31,3 % se decidió ingreso hospitalario lo que permitió arribar a la siguiente conclusión: Con la aplicación de Guías de Buenas Prácticas Clínicas par a el manejo de la exacerbación aguda del Asma Bronquial se logró una clasificación adecuada de la severidad de la misma, buena respuesta a los tratamientos utilizados y disminución de los ingresos hospitalarios.

  15. Colecistite aguda não-complicada: colecistectomia laparoscópica precoce ou tardia?

    Directory of Open Access Journals (Sweden)

    Ajith Sankarankutty

    2012-10-01

    Full Text Available Metanálises recentes sugerem que a colecistectomia laparoscópica precoce (dentro de uma semana do início dos sintomas para a doença aguda, não complicada, da vesícula biliar é segura e viável. No entanto, enquetes sobre as práticas cirúrgicas indicam que a colecistectomia laparoscópica precoce é realizada por apenas uma minoria dos cirurgiões. Além disso, o melhor momento para realização deste procedimento, bem como sua relação custo-eficácia continuam sendo uma questão de debate. A reunião de revista TBE - CiTE realizou uma avaliação crítica dos artigos mais relevantes, publicados recentemente, sobre o momento da colecistectomia laparoscópica e sua relação custo-eficácia para o tratamento da colecistite aguda não complicada e fornece recomendações baseadas em evidências sobre o tema. A literatura engloba pequenos ensaios com alto risco para vieses. Ela sugere que colecistectomia laparoscópica precoce é segura e encurta o período de internação. Há uma escassez de estudos bem desenhados e de grandes séries analisando custo-utilidade. As seguintes recomendações foram geradas: (1 a colecistectomia laparoscópica precoce deve ser tentada como o tratamento de primeira linha dentro de uma semana do início dos sintomas, e (2 O custo-efetividade da colecistectomia laparoscópica precoce deve ser avaliada em cada local, levando-se em consideração os recursos, tais como a disponibilidade de pessoal treinado e de equipamentos laparoscópicos.

  16. Doença enxerto versus hospedeiro aguda A- GVHD Acute graft-versus-host disease

    Directory of Open Access Journals (Sweden)

    Wellington Azevedo

    2010-05-01

    Full Text Available A doença enxerto contra hospedeiro aguda (A-GVHD é síndrome sistêmica que acomete pacientes transplantados de medula óssea que recebem linfócitos imuno-competentes. A fisiopatologia do fenômeno é complexa e envolve uma série de respostas de diversos efetores imunológicos a estímulos antigênicos naturais ou que são expressos devido ao dano tecidual provocado pela doença ou pelo condicionamento. A ocorrência desta complicação é frequente em transplantes de medula óssea e determina, em grande parte, a evolução clínica do paciente. Neste capítulo são discutidos aspectos da biologia da doença do enxerto versus hospedeiro aguda, da sua evolução clínica e do manejo profilático e terapêutico deste problema, que pode ser devastador para pacientes submetidos a transplantes alogênicos de medula óssea.Graft versus host disease (A-GVHD is a systemic disease that affects bone marrow transplant patients receiving immunocompetent lymphocytes. The pathophysiology of this phenomenon is complex and involves a number of different effector immune responses to antigenic stimuli that are expressed due to tissue damage caused by disease or conditioning. This complication is frequent in bone marrow transplants and often determines the clinical outcome. In this chapter we discuss aspects of the biology of chronic graft versus host disease, its clinical evolution and the prophylactic and therapeutic management of this problem which can be devastating for patients undergoing allogeneic bone marrow transplantation.

  17. Intoxicaciones agudas en pacientes mayores de 65 años

    Directory of Open Access Journals (Sweden)

    P. Miranda Arto

    2014-04-01

    Full Text Available Fundamento. Los estudios sobre la intoxicación aguda en sujetos de edad avanzada en nuestro país son escasos, a pesar de los riesgos asociados que presenta este grupo de pacientes. Material y métodos. Estudio descriptivo retrospectivo de las intoxicaciones agudas atendidas en el servicio de Urgencias del Hospital Clínico Universitario de Zaragoza entre 1995 y 2009, en pacientes con edad igual o mayor a 65 años. Resultados. Se registraron 762 casos, el 4,74% del total de intoxicados, con una edad media de 74,16 (SD ± 6 años. La vía oral fue la más frecuente (85% y por tipo de intoxicación, la sobredosis de alcohol (28,7%. Junto a éste, las benzodiacepinas (14,3% y los productos cáusticos (11% fueron los principales tóxicos involucrados. El 21% de los pacientes recibieron tratamiento específico antitóxico, no precisando ingreso el 82,4%. Se observó en la evolución temporal una tendencia que apuntaba a la disminución del tratamiento emético y del lavado gástrico y un aumento del carbón activado. La mortalidad de la serie fue del 1,04%. Conclusiones. Las intoxicaciones en pacientes mayores presentan una mayor morbimortalidad, precisando más ingresos y más tentativas autolíticas con resultado de muerte.

  18. Mielitis aguda necrotizante en un paciente con Sida Acute necrotizing myelitis in an AIDS patient

    Directory of Open Access Journals (Sweden)

    M. Corti

    2003-04-01

    Full Text Available Como consecuencia de la infección por el virus de la inmunodeficiencia humana tipo-1 (HIV-1, otros patógenos como citomegalovirus (CMV y herpes simple tipo 1-2 (HSV 1-2 pueden comprometer tanto el sistema nervioso central como el periférico. Estos agentes pueden involucrar también a la médula espinal y causar una mielitis aguda necrotizante. Esta complicación ocurre por lo general en pacientes con enfermedad HIV/sida avanzada y marcada inmunodeficiencia, con recuentos de linfocitos T CD4+ de menos de 50 cél/µL. El cuadro clínico, los cambios en el LCR y las neuroimágenes generan una importante sospecha diagnóstica. Es fundamental el inicio precoz de la terapia antiviral específica. Se presenta un paciente con enfermedad avanzada debida al HIV-1 y mielitis aguda necrotizante por CMV y HSV bajo la forma clínica de síndrome de la cola de caballo.In the setting of HIV infection, cytomegalovirus (CMV and herpes simplex virus type 1-2 (HSV 1-2 can affect both the central and peripheral nervous systems. These agents can involve the spinal cord and produce a necrotizing transverse myelitis. This usually occurs in AIDS patients with severe immunodeficiency: CD4 + lymphocyte counts typically are less than 50 cell/µL. The clinical presentation, CSF and imaging studies can provide a high level of suspicion diagnosis. Prompt initiation of antiviral specific drugs is essential. We report a patient with an acute necrotizing myelitis (cauda equina syndrome secondary to CMV and HSV infections.

  19. Bursectomy at radical gastrectomy

    Institute of Scientific and Technical Information of China (English)

    Cuneyt; Kayaalp

    2015-01-01

    Radical gastrectomy with extended lymph node dissec tion and prophylactic resection of the omentum, peri toneum over the posterior lesser sac, pancreas and/o spleen was advocated at the beginning of the 1960 s in Japan. In time, prophylactic routine resections of the pancreas and/or spleen were abandoned because of the high incidence of postoperative complications. However omentectomy and bursectomy continued to be standard parts of traditional radical gastrectomy. The bursaomentalis was thought to be a natural barrier against invasion of cancer cells into the posterior part of the stomach. The theoretical rationale for bursectomy was to reduce the risk of peritoneal recurrences by eliminating the peritoneum over the lesser sac, which might include free cancer cells or micrometastases. Over time, the indication for bursectomy was gradually reduced to only patients with posterior gastric wall tumors penetrating the serosa. Despite its theoretical advantages, its benefit for recurrence or survival has not been proven yet. The possible reasons for this inconsistency are discussed in this review. In conclusion, the value of bursectomy in the treatment of gastric cancer is still under debate and large-scale randomized studies are necessary. Until clear evidence of patient benefit is obtained, its routine use cannot be recommended.

  20. A radical publishing collective: the Journal of Radical Librarianship

    Directory of Open Access Journals (Sweden)

    Simon Barron

    2015-03-01

    Full Text Available In Brief: the Journal of Radical Librarianship is a new open-access journal publishing scholarly work in the field of radical librarianship. The focus on critical approaches to librarianship and anti-marketisation of information is reflected not only in our subject matter but in our publishing model, our licensing model, and our organisational practices. We hope to […

  1. Radical cystectomy in eldery

    Directory of Open Access Journals (Sweden)

    Bančević Vladimir

    2015-01-01

    Full Text Available Background/Aim. Radical cystectomy is the method of choice for the treatment of muscle invasive bladder cancer. This major surgery is associated with many complications, especially in older patients. The aim of this study was to analyze preoperative comorbidity, and intraoperative and postoperative complicatons in patients older than 75 years. Methods. This clinical, retrospective study included 46 patients over 75 years, who underwent radical cystectomy. Indications for surgery, and complications during and after the surgery were followed up. Results. Preoperatively, anemia caused by hematuria was registered in 76% of the patients. In 52% of the patients urine derivation was performed by ileal conduit, in 35% by ureterocutaneostomy and in 13% orthotopic ileal neobladder was created. The average duration of surgery was 190 (120-300 min. A total of 76% of the patients were treated by blood supstitution intraoperatively, average 630 (310-1230 mL. Concerning pathological stage of transitional cell carcinoma of urinary bladder, 26% of the patients had T2, 4% T3a, 52% T3b, and 14% T4a stage. In one case, planocellular carcinoma was diagnosed by patohistological examination, and in 2 cases prostate carcinoma was incidentally found. The average duration of hospitalization was 16 (8-35 days. Conclusion. The main reason for cystectomy in patients over 70 and 80 years was gross hematuria caused by bladder cancer, with consecutive anemia which could not be solved using endoscopic treatment or blood supstitution. As expected, a prolonged stay in hospital after cystectomy, and a higher rate of complications were recorded in this population.

  2. O papel da fisioterapia respiratória na bronquiolite viral aguda = Role of chest physiotherapy in acute viral bronchiolitis

    Directory of Open Access Journals (Sweden)

    Luisi, Fernanda

    2008-01-01

    Conclusões: mesmo que não existem evidências diretas, a fisioterapia respiratória tem sido utilizada na bronquiolite aguda com objetivo de desobstrução, higiene brônquica, prevenção de atelectasias e recrutamento alveolar, podendo contribuir para diminuição da resistência das vias aéreas, promover melhor ventilação-perfusão e diminuir o trabalho ventilatório pela remoção do excesso de muco. São necessários estudos clínicos randomizados, controlados e cegados, que avaliem as técnicas mais modernas, para que se possa definir o papel da fisioterapia respiratória no tratamento da bronquiolite viral aguda

  3. Apendicitis aguda sin enfermedad de Crohn en un paciente con inflamación intestinal. Informe de un caso

    OpenAIRE

    Ernesto Sierra-Montenegro; Eduardo Villanueva-Sáenz; José Luis Rocha-Ramírez; Javier Pérez-Aguirre; José Manuel Fernández-Rivero; René Soto-Quirino

    2008-01-01

    Introducción: La enfermedad de Crohn fue descrita por primera ocasión en 1932; la asociación de apendicitis aguda con esta enfermedad es muy rara y ante afectación del ciego el riesgo de fístula es muy alto. El objetivo fue informar un caso de apendicitis aguda en un paciente con diagnóstico de enfermedad de Crohn. Caso clínico: Mujer de 48 años de edad, con diagnóstico reciente de enfermedad de Crohn quien presentó cuadro clínico de dolor abdominal intenso en fosa iliaca derecha con tratamie...

  4. Factores pronósticos en leucemia mieloide aguda: utilidad de los estudios inmunofenotípicos y moleculares

    OpenAIRE

    Perea Durán, Granada

    2011-01-01

    La leucemia mieloide aguda (LMA) es una proliferación neoplásica de células inmaduras de estirpe mieloide que se produce por una alteración en la regulación del crecimiento y la diferenciación de las células hematopoyéticas. Durante las décadas de los 80 y 90 se produjo un avance muy importante en el diagnóstico de la leucemia aguda que ha permitido un mayor refinamiento diagnóstico y por tanto un tratamiento más individualizado de los enfermos. Aproximadamente el 60-80% de los adultos c...

  5. A 56-year-old woman with ampullary adenocarcinoma and acute pancreatitis Mujer de 56 años con adenocarcinoma de la ampolla de Vater y pancreatitis aguda

    Directory of Open Access Journals (Sweden)

    V. M. Santos

    2012-12-01

    Full Text Available A 56-year-old woman was admitted with jaundice, and laboratory data were indicative of pancreatitis, which recurred in spite of adequate clinical and nutritional management. The patient was an overweight diabetic using metformin, who had antecedents of cholelithiasis and recent cholecystectomy. Clinical and laboratory features were not conclusive about the cause of this acute pancreatitis. However, imaging data contributed to diagnosis suspicion, and the histopathology study of the transpapillary biopsy confirmed the ampullary adenocarcinoma. Whipple´s surgery was the procedure of choice, associated with radical lymphadenectomy, followed by an uneventful outcome. Recrudescence of signs and symptoms of acute pancreatitis, with elevated serum levels of bilirrubins and of hepatic canalicular enzymes, should enhance the suspicion index about periampullary tumors. High levels of CA 19-9 can constitute a useful marker of this condition. Transpapillary biopsy can characterize the diagnosis of ampullary malignancies.Se presenta el caso de una mujer de 56 años, que presentaba ictericia y cuyos exámenes de laboratorio fueran indicativos de pancreatitis. Presentó recurrencia a pesar de las medidas clínicas y nutricionales adecuadas. La paciente era diabética, con sobrepeso, tomaba metformina y con antecedentes de colelitiasis y reciente colecistectomía. Los datos clínicos y del laboratorio no fueron concluyentes acerca del origen de esta pancreatitis aguda. Sin embargo, los estudios de imagen contribuyeron a la sospecha del diagnóstico; los estudios de citologia exfoliativa y de biopsia transpapilar confirmaron un adenocarcinoma ampular. La cirugía de Whipple fue el procedimiento de opción, asociado con linfadenectomía radical, con resultado favorable. El recrudecimiento de señales y síntomas de pancreatitis aguda, con niveles séricos elevados de bilirrubina y de enzimas hepáticos debe reforzar el índice de sospecha acerca de tumores

  6. Validade da amilasemia e da lipasemia no diagnóstico diferencial entre pancreatite aguda/crônica agudizada e outras causas de dor abdominal aguda Validity of serum amylase and lipase for the differential diagnosis between acute/acutized chronic pancreatitis and other causes of acute abdominal pain

    OpenAIRE

    Ricardo Custódio Pacheco; Sérgio de Andrade Nishioka; Luiz Carlos Marques de Oliveira

    2003-01-01

    RACIONAL: Várias doenças abdominais podem cursar com aumento de amilasemia e lipasemia. OBJETIVO: Avaliar a validade da amilasemia e lipasemia para os diagnósticos diferenciais entre pancreatite aguda/pancreatite crônica agudizada, doenças das vias biliares, úlcera gastroduodenal perfurada e apendicite aguda. PACIENTES E MÉTODOS: Foram avaliados, prospectivamente, 38 pacientes com pancreatite aguda/pancreatite crônica agudizada, 35 com doenças das vias biliares, 17 com úlcera gastroduodenal p...

  7. Muoniated acyl and thioacyl radicals

    Energy Technology Data Exchange (ETDEWEB)

    McKenzie, Iain [TRIUMF and Department of Chemistry, 8888 University Drive, Simon Fraser University, Burnaby B.C., V5A 1S6 (Canada); Brodovitch, Jean-Claude [TRIUMF and Department of Chemistry, 8888 University Drive, Simon Fraser University, Burnaby B.C., V5A 1S6 (Canada); Ghandi, Khashayar [TRIUMF and Department of Chemistry, 8888 University Drive, Simon Fraser University, Burnaby B.C., V5A 1S6 (Canada); Percival, Paul W. [TRIUMF and Department of Chemistry, 8888 University Drive, Simon Fraser University, Burnaby B.C., V5A 1S6 (Canada)]. E-mail: percival@sfu.ca

    2006-03-31

    The product of the reaction of muonium with tert-butylisocyanate was previously assigned as the muoniated tert-butylaminyl radical (I. McKenzie, J.-C. Brodovitch, K. Ghandi, S. Kecman, P. W. Percival, Physica B 326 (2003) 76). This assignment is incorrect since the muon and {sup 14}N hyperfine-coupling constants (hfcc) of this radical would have the opposite sign, which is in conflict with the experimental results. The radical is now reassigned as the muoniated N-tert-butylcarbamoyl radical, based on the similarities between the experimental muon and {sup 14}N hfcc and hfcc calculated at the UB3LYP/6-311G(d,p)//UB3LYP/EPR-III level. The large zero-point energy in the N-Mu bond results in the dissociation barrier of the muoniated N-tert-butylcarbamoyl radical being above the combined energy of the reactants, in contrast to the N-tert-butylcarbamoyl radical where the dissociation barrier lies below the combined energy of the reactants. The reaction of muonium with tert-butylisothiocyanate produced both conformers of the muoniated N-tert-butylthiocarbamoyl radical and their assignment was based on the similarities between the experimental and calculated muon hfcc. These are the first acyl and thioacyl radicals to be directly detected by muon spin spectroscopy.

  8. Asma aguda em adultos na sala de emergência: o manejo clínico na primeira hora

    Directory of Open Access Journals (Sweden)

    DALCIN PAULO DE TARSO ROTH

    2000-01-01

    Full Text Available Asma é doença com alta prevalência em nosso meio e ao redor do mundo. Embora novas opções terapêuticas tenham sido recentemente desenvolvidas, parece haver aumento mundial na sua morbidade e mortalidade. Em muitas instituições, as exacerbações asmáticas ainda constituem emergência médica muito comum. As evidências têm demonstrado que a primeira hora no manejo da asma aguda na sala de emergência concentra decisões cruciais que podem determinar o desfecho desta situação clínica. Nesta revisão não-sistemática, os autores enfocaram a primeira hora da avaliação e tratamento do paciente com asma aguda na sala de emergência, descrevendo uma estratégia apropriada para o seu manejo. São consideradas as seguintes etapas: diagnóstico, avaliação da gravidade, tratamento farmacológico, avaliação das complicações e decisão sobre onde se realizará o tratamento adicional. Espera-se que estas recomendações contribuam para que o médico clínico tome a decisão apropriada na primeira hora do manejo da asma aguda.

  9. Síndrome de Guillain-Barré como complicação de amigdalite aguda

    Directory of Open Access Journals (Sweden)

    Cecatto Suzana B.

    2003-01-01

    Full Text Available A Síndrome de Guillain-Barré é uma polirradiculoneuropatia aguda ou subaguda e geralmente ocorre após uma doença infecciosa ou algum procedimento cirúrgico. A patogênese não é bem conhecida, mas provavelmente apresenta uma base imunológica. O objetivo deste trabalho é relatar um caso de amigdalite aguda de má evolução complicada com a Síndrome de Guillain-Barré. Os autores salientam a raridade do caso, a concomitância do início da infecção aguda com a própria Síndrome e a evolução rápida para a falência respiratória que normalmente ocorre somente em 20% dos casos. O tratamento foi a imunoterapia com rápida recuperação do paciente.

  10. Classificação de gravidade na pancreatite aguda Classification of severity of acute pancreatitis

    Directory of Open Access Journals (Sweden)

    Tercio De Campos

    2013-04-01

    Full Text Available De acordo com a Classificação de Atlanta a pancreatite aguda pode ser dividida, baseado em sua severidade, em uma forma leve ou grave. Uma série de aspectos têm sido discutidos nos últimos anos, tais como, quantas categorias de gravidade devem ser consideradas; se o doente com falência orgânica é igual ao doente com necrose infectada; qual o papel da falência orgânica transitória; e como avaliar a falência orgânica. A reunião de revista"Telemedicina Baseada em Evidência - Cirurgia do Trauma e Emergência" (TBE-CiTE realizou uma avaliação crítica de artigos relacionados a este tema, considerando três artigos recentes que delinearam duas grandes revisões publicadas nos últimos meses. Estes artigos sugerem a classificação de gravidade em três ou quatro categorias, ao invés de pancreatite aguda leve ou grave, além de discutir qual o melhor escore para avaliar a falência orgânica. As seguintes recomendações foram propostas: (1 A pancreatite aguda deve ser classificada em quatro categorias: leve, moderada, grave e crítica, o que permite uma melhor determinação das características dos doentes; (2 Avaliação de falência orgânica com um escore de gravidade, preferencialmente algum que avalie diretamente cada falência orgânica, tais como o SOFA e o MODS (Marshall. O SOFA parece ter maior acurácia, mas o MODS tem melhor aplicabilidade devido à facilidade de uso.Based on the Atlanta Classification, acute pancreatitis is classified according to its severity in either mild or severe acute pancreatitis. In recent years, several issues regarding acute pancreatitis have been discussed in the literature. These issues include how many categories of severity should be considered; whether or not a patient with organ failure holds similar holds severity of disease and prognosis of a patient with infected necrosis; the role of transient organ failure; and how to evaluate organ failure. The"Evidence-based Telemedicine - Trauma

  11. Soporte nutricional en la pancreatitis aguda Artificial nutrition in acute pancreatitis

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    J. Garnacho Montero

    2005-06-01

    Full Text Available Los cambios metabólicos que tienen lugar en la pancreatitis aguda originan, como en otros pacientes graves, una situación de estrés metabólico que, en muchas ocasiones, requiere la aplicación de soporte nutricional especializado. Los pacientes que presentan mayores niveles de gravedad (definida como un índice de Ranson = 3 o un APACHE II = 10 son los candidatos a recibir apoyo nutricional. La nutrición enteral debe ser la primera vía de aporte de nutrientes a considerar y debe mantenerse salvo que los pacientes presenten intolerancia o desarrollen dolor, ascitis, o incremento de las cifras de amilasa sérica. La nutrición enteral transpilórica, a través de una sonda naso-yeyunal o mediante yeyunostomía por catéter, es una vía de acceso segura en la pancreatitis aguda grave e incluso puede acompañarse de ventajas evolutivas para los pacientes en comparación con la nutrición parenteral. La indicación de nutrición parenteral estaría condicionada por la imposibilidad de obtener un abordaje enteral adecuado (yeyunal, la intolerancia a la nutrición enteral o la reagudización del proceso tras el inicio del soporte nutricional enteral. Con los datos actuales, no pueden establecerse recomendaciones acerca de las características idóneas que debe reunir la composición de nutrientes que deben recibir los pacientes con pancreatitis aguda.Metabolic changes that occur in acute pancreatitis result, as with other critically ill patients, in a metabolic stress situation that many times requires the application of a specialized nutritional support. Patients presenting the highest severity indexes (defined as Ranson's index = 3 or an APACHE II = 10 are candidates to receive nutritional support. Enteral nutrition must be the first route to consider for nutrients supply and must be maintained except for patients that have intolerance or develop pain, ascites, or increased serum amylase levels. Transpyloric enteral nutrition, through a naso

  12. PROTEÍNAS DE FASE AGUDA EM CÃES - REVISÃO DE LITERATURA

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    VIEIRA , Manuela Cristina

    2014-05-01

    Full Text Available In animals with disorder homeostasis due to infection, inflammation, tissue injury, cancer or immune disorder, there is an acute phase response (APR nonspecific. The APR is an immediate innate immune response, that produces protein mediators, they stand out among the acute phase proteins (APP, which are essential for the restoration of body homeostasis. After the stimulus generated by proinflammatory cytokines, particularly interleukin-1 (IL-1, interleukin-6 (IL-6 and tumor necrosis factor alpha (TNF-α, released by immune cells, the liver synthesizes and releases the majority of APP, which results in an increase in their bloodstream. Recent research has shown that the qualification and quantification of these proteins may aid diagnosis and provide valuable prognostic information and monitoring of diseases. Therefore, we present this review of the literature in order to describe the main PFA in small animals, and also update the veterinarians regarding the evaluation of these proteins in addition to the diagnosis, prognosis and monitoring treatment in dogs. Em animais com distúrbios na homeostase devido à infecção, inflamação, injúria tecidual, neoplasia ou desordem imunológica, há uma resposta de fase aguda (RFA inespecífica. A RFA é uma resposta imune inata imediata que produz mediadores proteicos, e entre eles se destacam as proteínas de fase aguda (PFA, que são indispensáveis para o restabelecimento da homeostasia corporal. Após o estímulo gerado pelas citocinas pró-inflamatórias, principalmente a interleucina-1 (IL-1, interleucina-6 (IL-6 e fator alfa de necrose tumoral (TNF-α, liberadas por células de defesa, o fígado sintetiza e libera a maioria das PFA, o que resulta no seu aumento na corrente sanguínea. Pesquisas recentes têm evidenciado que a qualificação e a quantificação destas proteínas podem subsidiar o diagnóstico e trazer valiosas informações prognósticas e de monitoramento de doenças. Portanto

  13. Efeitos hemodinâmicos da sobrecarga ventricular direita aguda experimental

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    Flávio Brito Filho

    2011-04-01

    Full Text Available FUNDAMENTO: A sobrecarga ventricular direita aguda está associada a situações clínicas de elevada morbimortalidade, tais como: ressecções pulmonares extensas, tromboembolismo pulmonar, transplante pulmonar e edema pulmonar das altitudes. Alguns pontos de sua fisiopatologia permanecem obscuros. OBJETIVO: Avaliar os efeitos hemodinâmicos da sobrecarga ventricular direita aguda experimental em suínos. MÉTODOS: A sobrecarga ventricular direita foi induzida pela oclusão das artérias pulmonares através de ligaduras. Vinte porcos foram utilizados no estudo, sendo alocados em 04 grupos: um controle, não submetido à oclusão vascular pulmonar, e três de sobrecarga ventricular direita submetidos à oclusão das seguintes artérias pulmonares: SVD1 (artéria pulmonar esquerda; SVD2 (artéria pulmonar esquerda e do lobo inferior direito e SVD3 (artéria pulmonar esquerda, do lobo inferior direito e do lobo mediastinal, obstruindo a vasculatura pulmonar em 42, 76 e 82,0% respectivamente. Variáveis de hemodinâmica foram medidas a cada 15 minutos durante a uma hora do estudo. Na análise estatística, foram utilizados ajustes de modelos lineares mistos com estrutura de variâncias e covariâncias. RESULTADOS: Nas comparações intergrupais, houve aumento significativo da frequência cardíaca (p = 0,004, pressão arterial pulmonar média (p = 0,001 e pressão capilar pulmonar (p < 0,0001. Houve redução significativa da pressão arterial média (p = 0,01 e do índice sistólico (p = 0,002. Não houve diferença significativa no índice cardíaco (p = 0,94. CONCLUSÃO: Apesar da intensa sobrecarga ventricular direita promovida pela obstrução de 82,0% da vasculatura pulmonar e pelo aumento significativo da pressão arterial pulmonar não houve disfunção cardiovascular severa e/ou choque circulatório no período estudado.

  14. SINDROME INTERMEDIO: UN PATRÓN TÍPICO DE INSUFICIENCIA RENAL AGUDA EN EL ANCIANO

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    Algranati L

    2004-01-01

    Full Text Available Acute renal failure is a frequent entity in the elderly. This is due on one hand to the structural and physiological changes of the aged kidney, and on the other hand to the exposure of this population to polypharmacy and their reduced capability to metabolize drugs. In the present report we present a case of a seventy year-old woman who developed acute renal failure secondary to severe dehydration with a clinical and laboratory pattern of intermediate syndrome: laboratory results compatible with parenchymal renal insufficiency (elevated urinary sodium, plasma urea and creatinine, but with a positive response to hydration. The main characteristics of the aged kidney that predispose to the development of an intermediate syndrome are: the vascular dysautonomy and reduced capability of sodium and water reabsorption. The intermediate syndrome is a typical pattern of pre-renal insufficiency in the elderly. RESUMEN: La insuficiencia renal aguda es frecuente en el anciano. Esto se debe por un lado a los cambios estructurales y funcionales propios del riñón senil, y por otro a la gran exposición que esta población tiene a la polifarmacia, y su reducida capacidad para metabolizar los medicamentos. En este reporte presentamos el caso de una mujer de 70 años que desarrolló una insuficiencia renal aguda secundaria a severa deshidratación, mostrando un patrón clínico y de laboratorio propio de un sindrome intermedio: laboratorios compatibles con una insuficiencia renal parenquimatosa (sodio urinario, uremia y creatininemia elevadas, pero con una respuesta favorable a la hidratación. Las principales características del riñón senil que predisponen al desarrollo del sindrome intermedio: son la disautonomía vascular y la reducida capacidad en la recuperación de sodio y agua El sindrome intermedio es un patrón típico de insuficiencia prerrenal en el anciano.

  15. Plasmaférese como modalidade terapêutica na pancreatite aguda por hipertrigliceridemia

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    Felipe Soares Castelliano Lucena de Castro

    2012-09-01

    Full Text Available Pancreatite aguda é uma condição inflamatória manifestada clinicamente por dor abdominal e níveis séricos elevados das enzimas pancreáticas. A hipertrigliceridemia é sua terceira causa mais comum. O presente relato teve por objetivo descrever um caso de pancreatite aguda por hipertrigliceridemia, cuja modalidade terapêutica utilizada foi a plasmaférese. Paciente, gênero feminino, 48 anos, apresentou-se ao hospital com queixa de "dor muito forte na barriga". Relatou início do quadro com náuseas, vômitos e dor abdominal do tipo queimação, iniciada em região epigástrica. Negou febre. Ao exame: obesa, orientada, taquipneica, normotensa, taquicárdica, normocorada, desidratada, afebril, anictérica, acianótica; abdome: distendido, ruídos hidroaéreos presentes, timpânico, doloroso difusamente, porém, principalmente em andar supramesocólico. Aos exames de admissão: triglicerídeo 10.932 mg/dL, colesterol 1.548 mg/dL, amilase 226 mg/dL, lípase 899 mg/dL. A tomografia computadorizada de abdome evidenciou pâncreas aumentado de volume (Balthazar E. Evoluiu com piora do estado geral, sendo encaminhada para o centro de terapia intensiva. Foi realizada plasmaférese sem intercorrências. No 14º dia, teve alta do centro de terapia intensiva indo para enfermaria de gastrenterologia, onde foi reiniciada dieta oral, com boa aceitação. Evoluiu bem, com alta hospitalar no 25º de internação. São necessários níveis elevados de triglicerídeos para causar pancreatite, sendo importante excluir causas mais comuns. A abordagem terapêutica utilizada foi importante para reduzir, rapidamente, a hipertrigliceridemia elevada, evitando, assim, danos tissulares maiores.

  16. Guest Editorial: Processes of Radicalization and De-Radicalization

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    Donatella Della Porta

    2012-05-01

    Full Text Available The study of radicalization and de-radicalization, understood as processes leading towards the increased or decreased use of political violence, is central to the question of how political violence emerges, how it can be prevented, and how it can be contained. The focus section of this issue of the International Journal of Conflict and Violence addresses radicalization and de-radicalization, seeking to develop a more comprehensive understanding of the processes, dynamics, and mechanisms involved and taking an interdisciplinary approach to overcome the fragmentation into separate disciplines and focus areas. Contributions by Pénélope Larzillière, Felix Heiduk, Bill Kissane, Hank Johnston, Christian Davenport and Cyanne Loyle, Veronique Dudouet, and Lasse Lindekilde address repressive settings, legitimacy, institutional aspects, organizational outcomes, and dynamics in Europe, Asia, Africa, and North and South America.

  17. Insuficiência renal aguda em paciente tratada com ATRA e anfotericina B: relato de caso

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    Gelcimar Moresco

    2011-06-01

    Full Text Available O presente relato apresenta o caso clínico de uma paciente com leucemia promie-locítica aguda tratada com ácido todo-transretinoico (ATRA, que apresentou suspeita de síndrome do ácido transreti-noico (síndrome de ATRA. Com a ocor-rência de leucopenia febril inespecífica, foram associados ao tratamento antimi-crobianos e antifúngicos. A diminuição da função renal, observada inicialmente, contribuiu para a suspeita de síndrome de ATRA, que foi agravada pelos antifúngi-cos. Assim, o uso de ATRA foi suspenso, mas somente 8 dias depois foi caracteriza-da pneumonia e descartada a hipótese de síndrome de ATRA. Nesse contexto, foi discutida a nefrotoxicidade do ATRA e a potencialização desse efeito adverso pelo uso de antifúngicos nefrotóxicos, em par-ticular da anfotericina B, assim como a im-portância do diagnóstico diferencial entre síndrome de ATRA e doença infecciosa.

  18. Toxicidad aguda de las hojas de Xanthium spinosum en ratones BALB/C

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    Arturo Silvero-Isidre

    2016-01-01

    Full Text Available Las hojas de la planta Xanthium spinosum se utilizan culturalmente en Paraguay por sus propiedades medicinales. Se evaluó la toxicidad aguda del extracto de hojas maduras; para el estudio se seleccionaron 35 ratones BALB/C machos que fueron distribuidos en 7 grupos, 6 de ensayo y 1 de control. El extracto fue preparado en concentraciones de 6 y 9% (g/dL; se administró la solución 6% a tres grupos y la solución 9% a los otros tres grupos, con dosis entre 200 y 1000 mg/kg. Al final de 14 días de observación, se extrajeron muestras de sangre para estudios laboratoriales de urea y transaminasas, además de órganos para estudios anatomopatológicos. Se determinaron aumentos en los niveles de GOT y urea en comparación al grupo control. Se concluye que el consumo del extracto de hojas maduras de Xanthium spinosum puede causar daño hepático.

  19. Epidemia de esquistossomose aguda na praia de Porto de Galinhas, Pernambuco, Brasil

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    Constança Simões Barbosa

    2001-06-01

    Full Text Available Este trabalho notifica a ocorrência de um surto de esquistossomose aguda na praia de Porto de Galinhas, Pernambuco, Brasil, quando 662 pessoas tiveram diagnóstico positivo para Schistosoma mansoni. A infecção humana em massa ocorreu no feriado de 7 de setembro, quando chuvas pesadas provocaram a enchente do rio Ipojuca que invadiu as residências. A maioria dos casos agudos foi representada por famílias de residentes locais que tiveram exposição diária às cercárias durante três semanas, até que as águas baixassem. O inquérito malacológico aponta para a possibilidade dos caramujos vetores terem sido introduzidos na localidade com os aterros realizados em quintais, onde vieram a se reproduzir em criadouros peridomiciliares. A infecção dos moluscos se deu a partir de vazamentos de fossas. Os resultados da clínica e do laboratório apontam para cerca de 62% de casos agudos. Estudos complementares estão sendo realizados, para a melhor compreensão deste evento epidemiológico de significativa magnitude para os órgãos de saúde pública e impacto para a população afetada.

  20. Consumo alimentar e estresse em pacientes com síndrome coronariana aguda

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    Evelise Helena Fadini Reis Brunori

    2015-10-01

    Full Text Available RESUMOObjetivo:Avaliar se o consumo alimentar de pacientes com síndrome coronariana aguda (SCA segue as recomendações nacionais e internacionais e se existe relação com níveis de estresseMétodo:Estudo transversal com 150 pacientes com SCA que foram entrevistados utilizando-se os Questionários de Frequência Alimentar e Escala de Estresse Percebido-10.Resultados:Consumo diário acima das recomendações: colesterol (92%, fi bras (42,7% e proteínas (68%; consumo abaixo das recomendações: potássio (88% e carboidratos (68,7%; consumo conforme recomendações: sódio (53,3% e lípides (53,3%. A maioria (54% com consumo alimentar inadequado era estressada ou altamente estressada. Houve associação estatisticamente signifi cante entre menor nível de estresse e maior consumo de fibras.Conclusão:Em pacientes com SCA, o consumo alimentar esteve fora do recomendado pelas diretrizes e o menor consumo de fibras ocorre concomitantemente com maior estresse. Esforços educativos podem instrumentalizar os pacientes na adequação do consumo alimentar e no controle do estresse.

  1. Actuación de enfermería en la leucemia mieloide aguda.

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    Melchor Pino, Pilar

    2012-08-01

    Full Text Available La leucemia mieloide aguda (LMA es una proliferación neoplásica de células inmaduras de estirpe mieloide que se produce por una alteración en el crecimiento y diferenciación de las células hematopoyéticas.En este trabajo se presenta un caso clínico sobre un paciente de 37 años diagnosticado de LMA. Se hace una valoración de las necesidades básicas siguiendo el modelo de Virginia Henderson al ingreso del paciente, mediante una entrevista dirigida y la obtención de datos mediante la observación.El objetivo general es elaborar un plan individualizado de cuidados a dicho paciente, mediante la aplicación del Proceso Enfermero y la utilización de la taxonomía NANDA-NOC-NIC que nos permitirá aplicar unos cuidados de calidad a este paciente.Cuando el paciente abandone el hospital, la enfermera le entregará un informe de alta, que asegurará la continuidad de sus cuidados.

  2. FISIOPATOLOGÍA DE LA INSUFICIENCIA RENAL AGUDA.NUEVAS CLAVES PARA UN VIEJO DILEMA

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    Carlos G. Musso

    2008-01-01

    Full Text Available Insuficiencia renal aguda (IRA es el término con el cual se designa a la reducción abrupta y sostenida del filtrado glomerular, de la cual resulta la retención de productos de desecho del metabolismo corporal. Clásicamente se dividen los mecanismos de la IRA en pre-renal, parenquimatoso, y obstructivo.En el caso de la IRA parenquimatosa, ésta pareciera ser el resultado de la sumatoria de las múltiples variables: necrosis y apoptosis tubular, alteración de la barrera de filtración, retrodifusión del filtrado glomerular, vasoconstricción intra-renal, contracción del mesangio, obstrucción intratubular, inflamación intersticial, activación de enzimas proteolíticas, entre otros.Por este motivo se postula que sólo una mirada de perspectiva multicausal de este síndrome pareciera ser la estrategia adecuada para conseguir su entendimiento cabal y tendiente a la resolución del mismo.

  3. Pancreatitis aguda: revisión de las nuevas guías del 2013

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    Pablo Orellana Soto

    2014-03-01

    Full Text Available La pancreatitis aguda es una patología que se produce por una inflamación del tejido pancreático y la consecuente liberación de las enzimas producidas por este órgano. Afecta, además del tejido pancreático, tejidos cercanos, produciendo complicaciones locales, y sistemas más alejados, produciendo falla orgánica. Según la evidencia de falla orgánica persistente se define la severidad de la enfermedad. En el 2013 se publicaron las guías actualizadas sobre el diagnóstico y manejo de esta patología por el “American College of Gastroenterology”, donde se analizó más de 150 artículos y se buscó dar recomendaciones según evidencia o criterio de expertos, tomando en cuenta lo avanzado en los últimos años. El objetivo de este artículo es realizar una revisión bibliográfica de estas guías y de otras referencias de relevancia.

  4. Redox Properties of Free Radicals.

    Science.gov (United States)

    Neta, P.

    1981-01-01

    Describes pulse radiolysis as a useful means in studing one-electron redox potentials. This method allows the production of radicals and the determination of their concentration and rates of reaction. (CS)

  5. Ecoporn, Irrationalities and Radical Environmentalism

    OpenAIRE

    Măntescu, Liviu

    2016-01-01

    This study explores the ‘irrationalities’ of deep ecology activism in the context of radical environmentalism by using the empirical example of ecoporn. Fuck For Forest is an environmental Non-Governmental Organisation which undertakes fund-raising for re-forestation and forest protection by means of pornography. Following twelve months of ethnographic fieldwork, this study presents first research results on a radical environmental project which does not promote democratic and established pro...

  6. O desafio de diagnosticar tromboembolia pulmonar aguda em pacientes com doença pulmonar obstrutiva crônica The challenge of diagnosing acute pulmonary thromboembolism in patients with chronic obstructive pulmonary disease

    OpenAIRE

    Sérgio Saldanha Menna-Barreto

    2005-01-01

    Tromboembolia pulmonar aguda e exacerbação aguda de doença pulmonar obstrutiva crônica são doenças comuns. A doença pulmonar obstrutiva crônica é um fator clínico de risco para tromboembolia pulmonar aguda. As apresentações clínicas da tromboembolia pulmonar aguda e da exacerbação aguda da doença pulmonar obstrutiva crônica freqüentemente mimetizam-se tanto que pode ser difícil distingui-las. Anormalidades estruturais nos pulmões com doença pulmonar obstrutiva crônica tornam também difícil a ...

  7. The games radicals play : special issue on free radicals and radical ions

    OpenAIRE

    Walton, John C; Ffrancon Williams

    2015-01-01

    Chemistry and Physics have aptly been described as “most excellent children of Intellect and Art” [1]. Both these “children” engage with many playthings, and molecules rank as one of their first favorites, especially radicals, which are amongst the most lively and exciting. Checking out radicals dancing to the music of entropy round their potential energy ballrooms is surely both entertaining and enlightening. Radicals’ old favorite convolutions are noteworthy, but the new styles, modes and a...

  8. Crystalline bipyridinium radical complexes and uses thereof

    Science.gov (United States)

    Fahrenbach, Albert C.; Barnes, Jonathan C.; Li, Hao; Stoddart, J. Fraser; Basuray, Ashish Neil; Sampath, Srinivasan

    2015-09-01

    Described herein are methods of generating 4,4'-bipyridinium radical cations (BIPY.sup..cndot.+), and methods for utilizing the radical-radical interactions between two or more BIPY.sup..cndot.+ radical cations that ensue for the creation of novel materials for applications in nanotechnology. Synthetic methodologies, crystallographic engineering techniques, methods of physical characterization, and end uses are described.

  9. Estratégias de prevenção da lesão renal aguda em cirurgia cardíaca: revisão integrativa

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    Eduesley Santana-Santos

    2014-04-01

    Full Text Available A lesão renal aguda é uma complicação frequente após cirurgia cardíaca, estando associada ao aumento de morbidade e mortalidade, e ao maior tempo de permanência em unidade de terapia intensiva. Considerando a alta prevalência e a associação da lesão renal aguda com o pior prognóstico, o desenvolvimento de estratégias de proteção renal torna-se indispensável, especialmente em pacientes com alto risco para o desenvolvimento de lesão renal aguda, como aqueles submetidos à cirurgia cardíaca, com o intuito de minimizar a incidência da lesão renal aguda no âmbito hospitalar, reduzindo, dessa forma, a alta morbimortalidade. A presente revisão integrativa teve por objetivo avaliar as evidências disponíveis na literatura sobre as intervenções mais eficazes na prevenção da lesão renal aguda em pacientes submetidos à cirurgia cardíaca. Para seleção dos artigos, utilizaram-se as bases de dados CINAHL e MedLine. A amostra desta revisão constituiu-se de 16 artigos. Após a análise dos artigos incluídos na revisão, os resultados dos estudos apontaram que apenas a hidratação com solução salina apresenta resultados consideráveis na prevenção de lesão renal aguda. As demais estratégias são controversas e necessitam de mais pesquisas para comprovar eficácia.

  10. Injuria renal aguda en la sepsis grave Acute kidney injury in severe sepsis

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    Hernán Trimarchi

    2009-06-01

    Full Text Available La sepsis afecta al 40% de los pacientes críticos, siendo su mortalidad de aproximadamente un 30% en el caso de la sepsis grave, y de 75% con injuria renal aguda, la cual sucede en el 20-51% de los casos. Se realizó un estudio prospectivo, observacional, longitudinal, en 80 pacientes sépticos graves en el lapso de 1 año para determinar el desarrollo de injuria renal aguda y su relación con la mortalidad; correlacionar antecedentes clínicos y variaciones del laboratorio con la mortalidad; determinar la tasa de mortalidad de la sepsis grave; relacionar óbito y foco séptico primario; evaluar la predictibilidad de mortalidad según niveles de creatinina de ingreso y sus variaciones finales. Se definieron dos grupos: Obito (n = 25 y No-óbito (n = 55. Analizados según la creatinina de ingreso, 39 tenían valores normales de creatinina (10 óbitos y 41 la presentaban elevada (15 óbitos; según la creatinina de egreso, 48 presentaron creatinina normal y fallecieron 7, mientras que 32 tenían daño renal agudo, de los cuales 18 fallecieron. De los 25 pacientes fallecidos, el 72% presentaron daño renal. De éstos, 7 pacientes vivos y 2 fallecidos requirieron hemodiálisis. El foco primario más frecuente fue el respiratorio (26.4%. El desarrollo de daño renal es un alto predictor de mortalidad en la sepsis, independientemente de los valores iniciales de creatinina. Edad más avanzada, hipertensión arterial, score APACHE más elevado, anemia más grave, hipoalbuminemia, hiperfosfatemia e hiperkalemia se asociaron a mayor mortalidad. La mortalidad global fue 31.3%. La imposibilidad de identificar el foco séptico primario se asoció a mayor mortalidad. El foco respiratorio se relacionó a mayor riesgo de requerir hemodiálisis.Sepsis affects 40% of critically ill patients, with a reported mortality of approximately 30% in severe sepsis, raising to 75% when acute kidney injury ensues, which occurs in about 20-51% of cases. The present study

  11. Hepatite aguda colestática pelo propiltiouracil: relato de caso Acute cholestatic hepatitis induced by propylthiouracil: case report

    OpenAIRE

    Mônica Beatriz PAROLIN; Lopes, Reginaldo Werneck; José Ederaldo Queiroz TELLES; Ioshii, Sergio Ossamu, 1960-; Nemer HAJAR

    2000-01-01

    Propiltiouracil é uma droga amplamente utilizada no tratamento do hipertiroidismo. A hepatotoxicidade é um dos efeitos colaterais mais raros e também mais graves associados a ela. Relata-se um caso de hepatite aguda colestática que acomete um jovem de 15 anos em uso de propiltiouracil para tratamento de hipertiroidismo. Causas virais, metabólicas e autoimunes foram excluídas e a biopsia hepática revelou achados histopatológicos sugestivos de hepatite colestática induzida por droga. Com a susp...

  12. Consenso intersociedades para el manejo de infecciones respiratorias: bronquitis aguda y enfermedad pulmonar obstructiva crónica

    OpenAIRE

    Gustavo Lopardo; Claudia Pensotti; Pablo Scapellato; Oscar Caberlotto; Aníbal Calmaggi; Liliana Clara; Manuel Klein; Gabriel Levy Hara; María J. López Furst; Analía Mykietiuk; Daniel Pryluka; Maria J. Rial; Claudia Vujacich; Diego Yahni

    2013-01-01

    La Sociedad Argentina de Infectología convocó a otras sociedades científicas para elaborar una guía práctica y actualizada para el manejo del tratamiento antibiótico de las bronquitis agudas (BA) y los episodios de reagudización de enfermedad pulmonar obstructiva crónica (EPOC), con el objetivo de promover el uso racional de los recursos diagnósticos y terapéuticos. La BA se caracteriza por la inflamación del árbol bronquial que afecta tanto a adultos como a niños sin enfermedades pulmonares ...

  13. Adiponectina sérica e risco cardiometabólico em pacientes com síndromes coronarianas agudas

    OpenAIRE

    Gustavo Bernardes de Figueiredo Oliveira; João Ítalo Dias França; Leopoldo Soares Piegas

    2013-01-01

    FUNDAMENTO: O tecido adiposo representa não somente uma fonte de energia estocável, mas principalmente um órgão endócrino que secreta várias citoquinas. A adiponectina, uma nova proteína semelhante ao colágeno, foi descoberta como uma citoquina específica do adipócito e um promissor marcador de risco cardiovascular. OBJETIVO: Avaliar a associação entre os níveis séricos da adiponectina e o risco para a ocorrência de eventos cardiovasculares, em pacientes com síndromes coronarianas agudas (SCA...

  14. Estrategia de atención de niños hospitalizados por infecciones respiratorias agudas bajas

    OpenAIRE

    Ana M Ferrari; María C Pirez; Alicia Ferreira; Ivonne Rubio; Alicia Montano; Rosa Lojo; Graciela Palomino; Gustavo Giachetto; Alvaro Galiana; María J Sarachaga; Silvana Mercado; Osvaldo Martinez; Marta Alberti; Hector Chiparelli; Soledad Mateos

    2002-01-01

    OBJETIVO: Mejorar la calidad de la atención hospitalaria de los niños con infecciones respiratorias agudas bajas, aumentar los conocimientos sobre esa patología y mejorar la eficiencia en el uso de los recursos asistenciales, por medio de una estrategia que se denominó Plan de Invierno.MÉTODOS: La estrategia se basó en la utilización de protocolos de diagnóstico y tratamiento, internación por cuidados progresivos y por enfermedad, adecuación de los recursos asistenciales y creación de un sist...

  15. Insuficiência renal aguda em pacientes internados por insuficiência cardíaca descompensada - Reincade

    OpenAIRE

    Larissa Cristina Nascimento de Barros; Fábio Serra Silveira; Marcos Serra Silveira; Thamara Carvalho Morais; Marco Antônio Prado Nunes; Kleyton de Andrade Bastos

    2012-01-01

    INTRODUÇÃO: Insuficiência renal aguda (IRA) acontece com frequência em pacientes críticos, porém a significância clínica de sua ocorrência não tem sido determinada na insuficiência cardíaca descompensada (ICD). OBJETIVOS: Estudar a ocorrência e valor prognóstico da IRA em pacientes internados por ICD e avaliar comparativamente com aqueles sem a complicação o perfil clínico-laboratorial e a mortalidade intra-hospitalar. MÉTODOS: Estudo prospectivo em 85 pacientes internados em terapia intensiv...

  16. Intoxicaciones agudas en un Servicio de Urgencias. Estudio descriptivo en el Área Sanitaria III de Asturias

    Directory of Open Access Journals (Sweden)

    D González-Fernández

    2009-01-01

    Full Text Available En los últimos años ha aumentado el número de intoxicaciones agudas en nuestro país, constituyen el 1-2% de las atenciones en los servicios de urgencias. El objetivo de este estudio es conocer la incidencia de las intoxicaciones agudas atendidas en el Servicio de Urgencias del Hospital San Agustín, sus principales características clínicas y sociodemográficas. Para ello, se ha realizado un estudio retrospectivo de las intoxicaciones agudas atendidas, durante el año 2007, en el Servicio de Urgencias del Hospital San Agustín. Se realizó un análisis descriptivo de las variables clínicas y sociodemográficas incluidas en el protocolo. Se atendieron 515 casos (1,06% de las urgencias atendidas con una incidencia de 333 casos/105hab/año. La edad media de los pacientes fue de 42 años (±15 D.E. siendo un 66,8% varones. El 53,1% de las intoxicaciones se atendieron en fin de semana y el 50,4%se atendieron en el tramo horario entre las 22 y las 8 horas. En función de la intencionalidad: 73,2% Ingesta voluntaria de alcohol y drogas. 22,1 % Intentos de suicidio. 4,7% Intoxicaciones accidentales. Los tóxicos más utilizados fueron: el etanol (75%, en segundo lugar las benzodiacepinas (29,5% y en tercer lugar lacocaína (5,2%. Destino: Alta 42%, Box observación 51%, Ingreso en planta 5%, Ingreso en UCI: 2%. Solo falleció un paciente (0,19%. En conclusión, las intoxicaciones agudas son más frecuentes en varones y su incidencia aumenta durante el fin de semana y la noche. Lostóxicos mas empleados son el alcohol y las benzodiacepinas. La mayoría de las intoxicaciones fueron resueltas en el Servicio de Urgencias.

  17. Mecanismos del daño celular en la insuficiencia renal aguda Mechanisms of cell damage in acute renal failure

    OpenAIRE

    José Martínez

    1989-01-01

    Los mecanismos del da no celular en la insuficiencia renal aguda Incluyen alteraciones en la producción de energía, la permeabilidad celular y el transporte de calcio. Dichas alteraciones producen cambios progresivos en la estructura celular que pueden ser reversibles si desaparece la causa que llevó a la falla renal, excepto cuando se alcanza la fase final de la lesión de la membrana y se llega a necrosis celu...

  18. Intoxicaciones agudas por psicofármacos y drogas de abuso en Pontevedra durante el año 2001

    OpenAIRE

    Fernández, P.; R. Sertal; A.M. Bermejo; M.J. Tabernero

    2005-01-01

    Se presenta un estudio epidemiológico de las intoxicaciones agudas por psicofármacos y drogas de abuso (excluyendo el alcohol), atendidas en el Servicio de Urgencias de adultos del Complejo Hospitalario de Pontevedra (CHOP) durante el año 2001. Utilizando el test cualitativo de screening de drogas de abuso Triage TM8 (Biosite Diagnostics), se analizaron 554 orinas, de las cuales 318 resultaron positivas, lo que supone un 0,56% del total de urgencias atendidas en este Cent...

  19. Intoxicaciones agudas en Santiago de Compostela,en un período de cuatro años

    OpenAIRE

    Fernández, P.; M. Ortega; A.M. Bermejo; M.J. Tabernero; M. López Rivadulla; ME Concheiro

    2003-01-01

    El objetivo de este trabajo fue evaluar las caracterís-ticas de un grupo de pacientes intoxicados en el área sanitaria deSantiago de Compostela. Para ello, se estudiaron 1192 intoxica-ciones agudas atendidas en el Servicio de Urgencias y Unidadde Cuidados Intensivos del Hospital Clínico Universitario deesta ciudad, desde el 1 de enero de 1993 al 31 de diciembre de1996. Se han considerado solo aquellos casos en los que se soli-citó un análisis toxicológico a este Instituto de Medicina Legal,de...

  20. Infección respiratoria aguda en niños que acuden a un centro de desarrollo infantil

    Directory of Open Access Journals (Sweden)

    Nandí-Lozano Eugenia

    2002-01-01

    Full Text Available Objetivo. Establecer la incidencia de infección respiratoria y los patrones de colonización faríngea en niños que asisten a guarderías. Material y métodos. Se realizó un estudio de cohorte en niños menores de cuatro años de edad, de uno u otro sexo, asistentes a la guardería del Hospital Infantil de México Federico Gómez, de la Ciudad de México, durante abril a octubre de 1999. Se registró la presencia de infección de vías aéreas superiores cada semana, y de colonización cada tres meses, mediante un exudado nasofaríngeo. Se hizo estadística descriptiva de las variables analizadas. Se determinaron tasas de infección respiratoria aguda. Resultados. Se estudiaron 85 niños, 40 del sexo femenino (47% y 45 del sexo masculino (53% durante un total de 9 090 niños/día de seguimiento. Tres niños tenían antecedentes de atopia (3.52%, seis niños antecedentes de asma (7.05%, y 39 eran expuestos a tabaquismo pasivo (45.88%. Se diagnosticaron 246 rinofaringitis (95.3%, nueve otitis media aguda (3.48%, tres bronquiolitis (1.16%, para un total de 258 eventos de infección respiratoria aguda. La tasa de incidencia global fue de 10.35 infecciones por niño/año de observación (IC 95% 8.7-12.0. La incidencia de otitis y bronquiolitis fue de 0.36 y 0.12 eventos por niño/año de observación. Se tomaron cultivos nasofaríngeos con una prevalencia de colonización para S. pneumoniae de 20.4%, H. influenzae no tipificable 13.1% y Moraxella catarrhalis 8.1%. Conclusiones. Los resultados no sólo demuestran una alta prevalencia de colonización debido a cepas invasivas, sino que también revelan una tasa de incidencia de infección respiratoria aguda del doble de lo reportado en estudios de comunidad. Estos resultados ayudan a caracterizar un problema pobremente documentado en nuestro país.

  1. Etnografía de la infección respiratoria aguda en una zona rural del altiplano mexicano

    OpenAIRE

    MARTÍNEZ HOMERO; SURIANO KIMBERLY; RYAN GERY W.; PELTO GRETEL H.

    1997-01-01

    Objetivo. Identificar los términos utilizados por las madres para referirse a enfermedades, signos y síntomas relacionados con infecciones respiratorias agudas, así como los signos de alarma que las motivan a buscar atención médica; asimismo, describir prácticas comunes de manejo de la enfermedad en el hogar. Material y métodos. Se trata de un estudio etnográfico en seis comunidades rurales del altiplano mexicano. Se entrevistó a 12 informantes clave, a seis madres de niños fallecidos por inf...

  2. Tratamiento quirúrgico de la diverticulitis aguda en la Comunidad Valenciana. Estudio multicéntrico.

    OpenAIRE

    Salvador Martínez, Antonio

    2015-01-01

    Diverticulitis aguda. Estado actual y controversias Este término representa un espectro de los cambios inflamatorios que van desde una inflamación local subclínica hasta la peritonitis generalizada con perforación libre. Su mecanismo de aparición gira alrededor de una perforación de un divertículo. El antiguo concepto de obstrucción luminal probablemente represente un hecho raro. El aumento de la presión intraluminal o las partículas espesadas de alimentos pueden erosionar la pared d...

  3. Nefrotoxicidad glomerular tardía en niños con leucemia aguda linfoblástica

    OpenAIRE

    Fraga Rodriguez, Gloria Mª

    2015-01-01

    Introducción En el tratamiento de la leucemia aguda linfoblástica (LAL) infantil se utilizan habitualmente altas dosis de methotrexate (MTX), entre otros quimioterápicos. Este tratamiento puede ocasionar un deterioro transitorio de la función renal que es bien conocido, si bien los posibles cambios a largo plazo no están muy descritos. El objetivo general de este estudio es evaluar la posible toxicidad glomerular tardía de dos protocolos de tratamiento de LAL de la Sociedad Española de ...

  4. Impacto de las alteraciones moleculares en el pronóstico de la Leucemia Mieloide Aguda (LMA) "de novo"

    OpenAIRE

    Hoyos Colell, Montserrat

    2014-01-01

    [spa] La Leucemia Mieloide Aguda (LMA) es una enfermedad hematológica heterogénea, que se caracteriza por la acumulación de células inmaduras en médula ósea. Los pacientes diagnosticados de LMA tienen una supervivencia del 40%, aproximadamente. Existen factores que predicen el pronóstico de los pacientes, como la edad, la leucocitosis, las comorbilidades, la enfermedad residual mínima y la citogenética. Además y gracias a la aparición de las nuevas técnicas moleculares se han descrito un elev...

  5. Peroxy radical partitioning during the AMMA radical intercomparison exercise

    Directory of Open Access Journals (Sweden)

    M. D. Andrés-Hernández

    2010-04-01

    Full Text Available Peroxy radicals were measured onboard two scientific aircrafts during the AMMA (African Monsoon Multidisciplinary Analysis campaign in summer 2006. This paper reports results from the flight on 16 August 2006 during which measurements of HO2 by laser induced fluorescence spectroscopy at low pressure (LIF-FAGE and total peroxy radicals (RO2*=HO2+ΣRO2, R= organic chain by two similar instruments based on the peroxy radical chemical amplification (PerCA technique were subject of a blind intercomparison. The German DLR-Falcon and the British FAAM-BAe-146 flew wing tip to wing tip for about 30 min making concurrent measurements on 2 horizontal level runs at 697 and 485 hPa over the same geographical area in Burkina Faso. A full set of supporting measurements comprising photolysis frequencies, and relevant trace gases like CO, NO, NO2, NOy, O3 and a wider range of VOCs were collected simultaneously.

    Results are discussed on the basis of the characteristics and limitations of the different instruments used. Generally, no data bias are identified and the RO2* data available agree quite reasonably within the instrumental errors. The [RO2*]/[HO2] ratios, which vary between 1:1 and 3:1, as well as the peroxy radical variability, concur with variations in photolysis rates and in other potential radical precursors. Model results provide additional information about dominant radical formation and loss processes.

  6. Neutrophil gelatinase-associated lipocalin (NGAL) como biomarcador de disfunción renal aguda en pacientes postoperados de cirugía cardiaca

    OpenAIRE

    García Álvarez, Mercedes

    2015-01-01

    La disfunción renal aguda (DRA) es una complicación frecuente en el postoperatorio inmediato de cirugía cardiaca; la probabilidad de desarrollarla puede llegar a ser de un 40%. La disfunción renal aguda con necesidad de diálisis (DRA-D), la forma más grave de DRA, tiene una incidencia que alcanza un 5%. El desarrollo de DRA asociada a la cirugía cardiaca (DRA-ACC) tiene un impacto directo en el pronóstico de estos pacientes aumentando la morbi-mortalidad a corto y largo plazo; además se a...

  7. Neutrophil gelatinase-associated lipocalin (NGAL) como biomarcador de disfunción renal aguda en pacientes postoperados de cirugía cardiaca

    OpenAIRE

    García Álvarez, Mercedes; Betbesé Roig, Antoni-Jordi; Rius Cornadó, Xavier

    2015-01-01

    La disfunción renal aguda (DRA) es una complicación frecuente en el postoperatorio inmediato de cirugía cardiaca; la probabilidad de desarrollarla puede llegar a ser de un 40%. La disfunción renal aguda con necesidad de diálisis (DRA-D), la forma más grave de DRA, tiene una incidencia que alcanza un 5%. El desarrollo de DRA asociada a la cirugía cardiaca (DRA-ACC) tiene un impacto directo en el pronóstico de estos pacientes aumentando la morbi-mortalidad a corto y largo plazo; además se asoci...

  8. Supervivencia a largo plazo de los pacientes trasplantados por leucemia mieloblástica aguda. Análisis de los factores de riesgo

    OpenAIRE

    Montes Gaisán, Carmen

    2015-01-01

    RESUMEN: La leucemia mieloblástica aguda (LMA) es un grupo heterogéneo de leucemias con perfiles biológicos y clínicos singulares y diferente pronóstico, englobando desde la Leucemia Promielocítica Aguda que responde a ácido retinoico en combinación con quimioterapia, hasta casos que solo pueden curarse con un procedimiento tan agresivo como es el trasplante alogénico (Alo-TPH). El trasplante autólogo (Auto-TPH) tiene un papel intermedio, con resultados discretamente mejores que la quimiotera...

  9. INSUFICIENCIA RENAL AGUDA EN EL ANCIANO. CONSIDERACIONES ACERCA DE SU VALORACIÓN Y TRATAMIENTO.

    Directory of Open Access Journals (Sweden)

    Musso CG

    2005-02-01

    Full Text Available RESUMEN:La insuficiencia renal aguda (IRA es un trastorno frecuente en los ancianos a raíz de la senescencia renal, la menor metabolización de los fármacos y la mayor exposición a la polifarmacia y enfermedades sistémicas que ellos padecen. Las siguientes son las principales características de la IRA en el anciano: carácter multifactorial, presentación clínica atípica, fragilidad tubular, patrón de síndrome intermedio y poca fiabilidad del examen físico y de los índices urinarios en la interpretación de su etiología. Las medidas de profilaxis y rehidratación siguen siendo los mejores tratamientos de la IRA en el viejo. La biopsia renal y la diálisis tienen el mismo rol tanto en el grupo senil como en el joven.ABSTRACTACUTE RENAL FAILURE IN THE ELDERLY: PEARLS FOR ITS ASSESSMENT AND TREATMENT.Acute renal failure (ARF is a frequent disorder in the elderly, and this phenomenon is due to the senescence process, reduced metabolization of drugs, increased exposure to polypharmacy and systemic diseases of the aged group. The following are the main characteristics of the ARF in the elderly: mulfactorial, atypical presentation, tubular frailty, intermediate syndrome pattern, low reliable physical examination and urinary indeces. Profilaxis and rehydration are the best treatments for ARF in the old population. Renal biopsy and dialysis have the same role in young and old people.

  10. Enfermedad diarreica aguda por Escherichia coli patógenas en Colombia

    Science.gov (United States)

    Gómez-Duarte, Oscar G.

    2014-01-01

    Resumen Las cepas de E. coli patógenas intestinales son causas importantes de la enfermedad diarreica aguda (EDA) en niños menores de 5 años en América Latina, África y Asia y están asociadas a alta mortalidad en niños en las comunidades más pobres de África y el Sudeste Asiático. Estudios sobre el papel de las E. coli patógenas intestinales en la EDA infantil en Colombia y otros países de América Latina son limitados debido a la carencia de ensayos para detección de estos patógenos en los laboratorios clínicos de centros de salud. Estudios recientes han reportado la detección de E. coli patógenas intestinales en Colombia, siendo la E. coli enterotoxigénica la cepa más frecuentemente asociada a diarrea en niños menores de 5 años. Otros patógenos detectados en estos pacientes incluyen las E. coli enteroagregativa, enteropatógena, productora de toxina Shiga, y de adherencia difusa. Con base en estudios que reportan la presencia de E. coli productora de toxina Shiga y E. coli enteroagregativa en carnes y vegetales en supermercados, se cree que productos alimentarios contaminados contribuyen a la transmisión de estos patógenos y a la infección del huésped susceptible. Más estudios son necesarios para evaluar los mecanismos de transmisión, el impacto en la epidemiologia de la EDA, y las pautas de manejo y prevención de estos patógenos que afectan la población pediátrica en Colombia. PMID:25491457

  11. Injúria renal aguda: um alerta global Acute kidney injury: a global alert

    Directory of Open Access Journals (Sweden)

    Philip Kam Tao Li

    2013-03-01

    Full Text Available A Injúria Renal Aguda (IRA é cada vez mais prevalente nos países desenvolvidos e nos em desenvolvimento, e está associada com morbidade e mortalidade severas. A maioria das causas da IRA pode ser evitada por meio de intervenções em nível individual, comunitário, regional e intra-hospitalar. Medidas efetivas devem incluir, em toda a comunidade, os esforços para aumentar a consciência dos efeitos devastadores do IRA e fornecer orientações sobre as estratégias de prevenção, bem como o reconhecimento e tratamento precoces. Os esforços devem ser focados em minimizar as causas de IRA, aumentando a consciência da importância de medidas seriadas de creatinina sérica em pacientes de alto risco para IRA, e documentar o volume de urina em pessoas gravemente doentes para obtenção de diagnóstico precoce; até o momento, não há ainda um papel definitivo para outros biomarcadores. Há a necessidade de protocolos para sistematizar a conduta em condições de IRA pré-renal e em infecções específicas. Dados mais precisos sobre a verdadeira incidência e o impacto clínico da IRA ajudarão a melhor conhecer a importância desta doença, a aumentar o conhecimento de IRA por parte dos governantes, dos médicos em geral e de outros profissionais de saúde para ajudar na prevenção da doença. A prevenção é a chave para evitar a pesado ônus de mortalidade e morbidade associada com IRA.

  12. Citarabina y reacciones cutáneas en leucemia aguda mieloide

    Directory of Open Access Journals (Sweden)

    Sofía Grille

    2013-12-01

    Full Text Available La citarabina es un antimetabolito utilizado en el tratamiento de las leucemias agudas mieloides (LAM. Esta droga presenta numerosos efectos adversos (mielosupresión, toxicidad en sistema nervioso central, hepática, gastrointestinal, ocular y cutánea. La toxicidad dermatológica es habitualmente descrita como rara, sin embargo existen diferencias en la incidencia comunicada. Se realizó un estudio retrospectivo donde se incluyeron todas las LAM tratadas con quimioterapia que incluía citarabina, entre el 1º de julio 2006 y el 1° de julio 2012. Se incluyeron 46 pacientes con una mediana de edad de 55 años. La incidencia global de reacciones cutáneas fue de 39% (n = 18. La presencia de lesiones cutáneas no se asoció con sexo, edad, antecedentes de atopía, de reacciones medicamentosas, tipo de LAM ni dosis de citarabina utilizada. Las lesiones se observaron entre 2 a 8 días de iniciado el tratamiento. En cuanto al grado lesional, 27.8% presentaron grado 1, 38.9% grado 2 y 33.3% grado 3. No existieron lesiones grado 4 ni muerte vinculada a toxicidad cutánea. En cuanto al tipo de lesiones, 55.6% se presentaban con máculas, 22.2% con pápulas y 22.2% con eritema. Con respecto a la distribución de las lesiones, 52% de los pacientes presentaron una distribución difusa, 39.3% acral y 8.7% a nivel flexural. Las reacciones adversas cutáneas con la administración de citarabina son frecuentes en nuestro medio, en algunos casos con afectación grave. Si bien suelen resolverse espontáneamente, pueden determinar mayor riesgo de infección, así como comprometer la calidad de vida.

  13. A sepse como causa de lesão renal aguda: modelo experimental

    Directory of Open Access Journals (Sweden)

    Carolina Ferreira Pinto

    2012-10-01

    Full Text Available A sepse associada à falência de múltiplos órgãos como a lesão renal aguda (LRA demonstra alta taxa de mortalidade no paciente crítico. Este estudo investigou a LRA induzida pela sepse em modelo experimental. Foram utilizados ratos da raça Wistar, adultos e machos divididos nos seguintes grupos: Controle - controle cirúrgico e Sepse - indução da sepse pela ligadura e punção do cécon (LPC. Foram avaliados os parâmetros fisiológicos (temperatura retal, pressão arterial média - PAM, glicemia sérica e fluxo urinário; a função renal (clearance de creatinina; o estresse oxidativo (peróxidos urinários e substâncias reativas com ácido tiobarbitúrico - TBARS e realizada a análise histológica renal. O estudo conclui que a LRA induzida pela sepse caracteriza-se por lesão endotelial com disfunção hemodinâmica, liberação de mediadores inflamatórios e geração de espécies reativas de oxigênio (EROs por células tubulares, caracterizando-se como uma associação de vasoconstrição renal de origem hemodinâmica e inflamatória.

  14. Standard Electrode Potentials Involving Radicals in Aqueous Solution: Inorganic Radicals

    Energy Technology Data Exchange (ETDEWEB)

    Armstrong, David A.; Huie, Robert E.; Koppenol, Willem H.; Lymar, Sergei V.; Merenyi, Gabor; Neta, Pedatsur; Ruscic, Branko; Stanbury, David M.; Steenken, Steen; Wardman, Peter

    2015-12-01

    Recommendations are made for standard potentials involving select inorganic radicals in aqueous solution at 25 °C. These recommendations are based on a critical and thorough literature review and also by performing derivations from various literature reports. The recommended data are summarized in tables of standard potentials, Gibbs energies of formation, radical pKa’s, and hemicolligation equilibrium constants. In all cases, current best estimates of the uncertainties are provided. An extensive set of Data Sheets is appended that provide original literature references, summarize the experimental results, and describe the decisions and procedures leading to each of the recommendations

  15. Radical formation by heavy metals

    Energy Technology Data Exchange (ETDEWEB)

    Beuter, W.

    1982-09-01

    Certain reduced heavy metal ions can convert oxygen to a ''reactive oxygen species'' by donation of an electron. The reactive oxygen then attacks structures susceptible to oxidation, in particular unsaturated fatty acids, and peroxidizes them in a radical reaction. This process is inhibited by the presence of vitamin E and by other means. Peroxidized lipids decay forming free radicals in the process which themselves can peroxidise neighbouring lipids in a radical chain reaction. This decay is, moreover, catalysed by reduced heavy metal ions but on the other hand retarded by selenium-containing glutathione peroxidase. Radical formation by heavy metals is considerably involved in (i) the production of parenteral iron poisoning of the piglet (ii) haemolytic crisis occurring in ruminants through chronic copper poisoning (iii) the production of lead poisoning in ruminants and other animals. These types of poisonings are made worse by a deficiency of vitamin E and/or selenium. Factors which increase the bio-availability of the free heavy metal ion or reduce the redox potential thereof can aid radical formation as well as factors which lead to a reduction of the heavy metal ion e.g. cysteine, ascorbic acid or glucose.

  16. Experimental model of severe acute pancreatitis in rabbits Modelo experimental de pancreatite aguda grave em coelhos

    Directory of Open Access Journals (Sweden)

    Alberto Goldenberg

    2007-10-01

    Full Text Available PURPOSE: To develop an experimental model of severe acute pancreatitis in rabbits through a pancreatic ductal injection of sodium taurocholate. METHODS: Twenty-four albino rabbits of the New Zealand lineage were distributed into four groups of six animals (A, B, C and S. The rabbits of three experimental groups (A, B and C were submitted to a laparatomy and received a pancreatic ductal injection of 1ml/kg sodium taurocholate 5%. Also, they were submitted to further laparatomies after 4h, 8h and 12h, respectively. The control group (S was subdivided into two groups of three animals: in subgroup S1 only the pancreatic duct catheterization was performed whereas in subgroup S2 the pancreatic duct catheterization as well as an injection of 1ml/kg physiologic solution 0.9% were carried out. After 12 hours, the rabbits were evaluated. In the re-intervention, blood was collected to determine the amylasemia and a pancreatectomy was carried out to investigate interstitial infiltration, steatonecrosis and necrosis of the organ, using an optical microscope. RESULTS: There was an elevation of amylase in all groups thus proving the existence of acute pancreatitis. The size of the interlobular septum increased progressively with a greater variation between group S1 (0.13 and group C (0. 53 (p=0.035. While all the animals in group A exhibited focal cellular necrosis, it was more intense in the rabbits of group B and culminated with a high proportion of severe pancreatic necrosis in group C animals. The difference in the intensity of cellular necrosis showed statistic significance (p=0.001. CONCLUSION: The proposed experimental model demonstrated its reproducibility and effectiveness in producing severe acute pancreatitis in rabbits.OBJETIVO: Desenvolver modelo experimental de pancreatite aguda grave em coelhos por meio da injeção de taurocolato de sódio no ducto pancreático. MÉTODOS: Vinte e quatro coelhos albinos da linhagem Nova Zelândia foram distribu

  17. Epistemological barriers to radical behaviorism

    Science.gov (United States)

    O'Donohue, William T.; Callaghan, Glenn M.; Ruckstuhl, L. E.

    1998-01-01

    The historian and philosopher of science Gaston Bachelard proposed the concept of epistemological barriers to describe the intellectual challenges encountered by scientists in their work. In order to embrace novel ways of approaching a problem in science, scientists must overcome barriers or obstacles posed by their prior views. For example, Einsteinian physics presents scientists with claims that space is curved and that time and space are on the same continuum. We utilize Bachelard's concept of epistemological barriers to describe the differences between the intellectual journeys students pursuing advanced studies face when attempting to accept cognitive psychology or radical behaviorism. We contend that the folk psychological beliefs that students typically hold when entering these studies pose less challenge to cognitive psychology than to radical behaviorism. We also suggest that these barriers may also partly be involved in the problematic exegesis that has plagued radical behaviorism. In close, we offer some suggestions for dealing with these epistemological barriers. PMID:22478314

  18. Vaginal radical trachelectomy: an update.

    Science.gov (United States)

    Plante, Marie

    2008-11-01

    The vaginal radical trachelectomy has emerged as a valuable fertility-preserving treatment option for young women with early-stage disease. Cancer-related infertility is associated with feelings of depression, grief, stress, and sexual dysfunction. Data have shown that the overall oncological outcome is safe and that the obstetrical outcome is promising. In this article, we analyze the data on the vaginal radical trachelectomy published over the last 10 years in the context of what we have learned, what issues remain unclear, and what the future holds.

  19. Radical democratic politics and feminism

    Directory of Open Access Journals (Sweden)

    Martínez Labrin, Soledad

    2006-05-01

    Full Text Available In the article I present a reflection around the radical democratic project proposed by Chantal Mouffe and Ernesto Laclau. Specifically, I examine the application of the project in the context of the “new social movements” and especially, of feminist movement. I state the need of drawing attention to universalism and essentialism as the main obstacles to generate a collective proposal without margins. Nevertheless, doubts remind about the possibility of building up a feminism tailored by the radical democratic project, in a stage in which the political action of such a movement is characterized by categories that are closed and crystallized

  20. Abordaje transumbilical en pacientes pediátricos con sospecha de apendicitis aguda. Un serie de 424 pacientes

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    Luis Augusto Zárate Suárez

    2013-05-01

    Full Text Available Antecedentes: El tratamiento de la apendicitis aguda implica su extirpación; es frecuente la solicitud de cicatrices postquirúrgicas del mejor tamaño posible. Una de las estrategias disponibles es el abordaje transumbilical. Objetivos: Descubrir las características clínicas y los desenlaces operatorios de los pacientes pediátricos en quienes se realiza apendicectomía vía transumbilical. Metodología: Estudio prospectivo de 424 pacientes sucesivos en cuanto a los desenlaces operatorios a corto plazo. Resultados: El tiempo promedio de intervención quirúrgica fue de 22 minutos; 95,8% de los pacientes presentó evolución satisfactoria del postquirúrgico; 1,4% de los pacientes se reintervino para drenar un absceso intracavitario residual y 0,2% presentó infencción de sitio operatorio sin mas complicaciones. Conclusión: El abordaje transumbilical de la apendicitis es una alternativa minimamente invasiva para todos los estados de apendicitis aguda e implica disminución del tiempo de realización, menor estancia del postquirúrgico, menor incidencia de complicaciones y mayor conformidad con los resultados estéticos.

  1. Aspectos tomográficos da órbita aguda infecciosa: revisão de literatura

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    Ana Célia Baptista Koifman

    2014-04-01

    Full Text Available As doenças que acometem a órbita de forma aguda e não traumática por vezes não são conhecidas por médicos em centros de emergência. Essas condições são decorrentes de diversos fatores, como desordens imunológicas, congênitas, infecciosas, vasculares, entre outras. As causas infecciosas correspondem a mais de 50% de todos os casos e requer rápido diagnóstico e conduta para minimização de sequelas. A tomografia computadorizada (TC é o exame de imagem de primeira linha nesses casos, sendo geralmente disponível nos centros de emergência e capaz de fornecer auxílio diagnóstico de forma rápida, precisa e eficaz. Esse artigo de revisão visa descrever os principais aspectos tomográficos da órbita aguda infecciosa, correlacionando-os com os dados da literatura.

  2. Meningencefalites bacterianas agudas em crianças: complicações e sequelas neurológicas

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    NATALINO WLADIMIR

    1999-01-01

    Full Text Available Foram estudadas 271 crianças com idade inferior a 15 anos, com diagnóstico de meningencefalite bacteriana aguda (MBA, no período 1980 -- 1990. Os pacientes foram divididos em dois grupos, conforme não tivessem recebido tratamento prévio (STP, 153 casos, e os que receberam tratamento prévio (CTP, 118 casos. Ocorreram diferenças significativas em relação a identificação do agente etiológico, que foi maior no grupo STP, e em relação a ocorrência de ventriculite, maior no grupo CTP. Ocorreu óbito em 19,5% dos 271 casos, com predomínio em crianças de idade abaixo de 12 meses (29,7% e nos pacientes com MBA por Streptococcus pneumoniae. As manifestações epilépticas e as paresias na fase aguda da MBA predominaram em crianças de idade abaixo de 1 ano. Foram identificados e tratados do ponto de vista neurocirúrgico as ventriculites, higroma subdural, hidrocefalia, empiema subdural e abscesso cerebral.

  3. Detecting Social Polarization and Radicalization

    DEFF Research Database (Denmark)

    Qureshi, Pir Abdul Rasool; Memon, Nasrullah; Wiil, Uffe Kock;

    2011-01-01

    This paper proposes a novel system to detect social polarization and to estimate the chances of violent radicalization associated with it. The required processes for such a system are indicated; it is also analyzed how existing technologies can be integrated into the proposed system to fulfill the...

  4. Kinetics of nitroxyl radical reactions

    International Nuclear Information System (INIS)

    Absolute rate-constants for the reaction of the nitroxyl free radicals TAN and TMPN with radiation-chemically-formed radicals and ions have been determined. k(TAN + X) (in M-1 sec-1) = 4.0 x 109 (for X =OH), 2.9 x 1010(esub(aq)-), 8.0 x 109 (H), 7.2 x 108 (CH2OH), 4.0 x 108 (CH3CHOH), 4.3 x 108 ((CH3)2COH), 2.8 x 108 (CH2(CH3)2COH), 5.9 x 107 (glucose radical), 4.0 x 108 (c-C5H9), and k(TMPN + X) = 3.4 x 109 (OH), 7.8 x 109 (esub(aq)-), 4.9 x 109 (H), 4.4 x 108 (CH2OH), 4.9 x 108 (CH3CHOH), 3.6 x 108 ((CH3)2COH), 1.5 x 108 (CH2(CH3)2COH), 4.9 x 107 (glucose radical), 4.3 x 108 (c-C5H9). Direct measurements by means of a pulse-radiolysis conductivity technique were based on the formation and destruction of charged species in these reactions within certain pH ranges. It is indicated that the radiosensitizing nitroxyles undergo both redox and addition reactions. (author)

  5. Remembering Dutch-Moluccan radicalism

    DEFF Research Database (Denmark)

    Marselis, Randi Lorenz

    2016-01-01

    This article examines memory politics in relation to radical actions of young Dutch-Moluccans, more specifically a train hijacking in 1977 at the village of De Punt in the Netherlands. The article examines how these historical events were remembered in the drama-documentary television film, De Punt...

  6. Wild radical square zero algebras

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    It is shown that a radical square zero algebra is wild, if and only if it is of Corner's type, and it is strictly wild if and only if it is Endo-wild. This gives a negative answer to a problem posed by Simson.

  7. Exploring the Theories of Radicalization

    Directory of Open Access Journals (Sweden)

    Maskaliūnaitė Asta

    2015-12-01

    Full Text Available After the London bombings in July 2005, the concern of terrorism scholars and policy makers has turned to “home-grown” terrorism and potential for political violence from within the states. “Radicalization” became a new buzz word. This article follows a number of reviews of the literature on radicalization and offers another angle for looking at this research. First, it discusses the term “radicalization” and suggests the use of the following definition of radicalization as a process by which a person adopts belief systems which justify the use of violence to effect social change and comes to actively support as well as employ violent means for political purposes. Next, it proposes to see the theories of radicalization focusing on the individual and the two dimensions of his/her motivation: whether that motivation is internal or external and whether it is due to personal choice or either internal (due to some psychological traits or external compulsion. Though not all theories fall neatly within these categories, they make it possible to make comparisons of contributions from a variety of different areas thus reflecting on the interdisciplinary nature of the study of terrorism in general and radicalization as a part of it.

  8. Pericarditis aguda en Puesto Avanzado de Combate (Afganistán: cuando un diagnóstico sencillo se convierte en complicado

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    E. López Soberón

    2013-12-01

    Full Text Available Se presenta un caso de pericarditis aguda diagnosticado en el Puesto Avanzado de Combate «Ricketts» (Muqur, Afganistán, con las limitaciones logísticas y sanitarias presentes en Zona de Operaciones, que cursó con buena evolución hasta su curación.

  9. Efeito da hipertermia na pancreatite aguda grave experimental Effects of hyperthermia on experimental severe acute pancreatitis

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    Maurício Gustavo Ieri Yamanari

    2007-02-01

    Full Text Available OBJETIVO: O objetivo deste estudo é avaliar os efeitos da hipertermia na pancreatite aguda (PA grave experimental induzida por ácido taurocólico. MÉTODO: A PA grave foi induzida pela injeção retrógrada de ácido taurocólico a 2,5% ou 5% no ducto pancreático principal. Após a indução, os animais foram colocados numa gaiola contendo duas lâmpadas de 100 W. A temperatura corporal foi aumentada para 39,5ºC e mantida neste nível por 45 minutos. Foram estudados taxa de mortalidade em 72 horas, permeabilidade vascular no pâncreas, porcentagem de água no tecido pancreático, amilase sérica, histologia (edema, necrose acinar e infiltrado inflamatório e níveis séricos de IL-6 e IL-10. RESULTADOS: Não houve alteração em nenhum dos parâmetros avaliados. CONCLUSÃO: Não há benefício da hipertermia na PA grave experimental induzida por ácido taurocólico.OBJECTIVE: The aim of this study is to evaluate the effects of hyperthermia post-treatment on taurocholate-induced severe acute pancreatitis (AP in rats. METHOD: Severe AP was induced by retrograde injection of 2,5% or 5% taurocholate solution into the main pancreatic duct. After the AP induction, animals were heated in a cage with two 100 W lamps. Body temperature was increased to 39ºC and maintained at that level for 45 minutes. 72-hours mortality rate, amylase serum levels, histology (edema, acinar necrosis and inflammatory infiltrate, vascular permeability, pancreatic water content and serum levels of IL-6 and IL-1 were determinated. RESULTS: Hyperthermia post-treatment on severe AP showed no evidence of alteration in all evaluated parameters. CONCLUSION: The findings suggest no beneficial effect of the thermal stress on inflammatoy edema and mortality rate in taurocholate AP model.

  10. Injúria Renal Aguda no paciente politraumatizado Acute Renal Injury in polytrauma patients

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    Thiago Gomes Romano

    2013-03-01

    Full Text Available A Injúria Renal Aguda (IRA no contexto do paciente politraumatizado ocorre, na maioria das vezes, por uma conjuntura de fatores que passam por eventos correlacionados à ressuscitação volêmica inicial, ao grau de resposta inflamatória sistêmica associada ao trauma, ao uso de contraste iodado para procedimentos diagnósticos, à rabdomiólise e à síndrome compartimental abdominal. Atualmente, passamos por uma fase de uniformização dos critérios diagnósticos da IRA com o Acute Kidney Injury Network (AKIN, sendo a referência mais aceita. Consequentemente, o estudo da IRA no politraumatismo também passa por uma fase de reformulação. Esta revisão da literatura médica visa trazer dados epidemiológicos, fisiológicos e de implicação clínica para o manuseio destes pacientes, bem como expor os riscos do uso indiscriminado de expansores volêmicos e particularidades sobre a instituição de terapia renal substitutiva em indivíduos sob risco de hipertensão intracraniana.Acute Kidney Injury (AKI in trauma is, in most cases, multifactorial. Factors related to the initial ressuscitation protocol, degree of the systemic inflamatory response to trauma, contrast nephropathy in diagnostic procedures, rhabdomyolysis and abdominal compartment syndrome are some of those factors. Nowadays a uniformization in diagnostic criteria for AKI has been proposed by the Acute Kidney Injury Network (AKIN and as a result the incidence of AKI and its impact in outcomes in trauma patients also needs to be reconsider. In this review we aim to approach epidemiologic, physiologic and clinical relevant data in the critical care of patients victims of trauma and also to expose the risks of indiscriminate use of volume expanders and the interaction between renal replacement theraphy and intracranial hypertension.

  11. Conocimientos maternos sobre signos de peligro en diarrea aguda en el marco de la estrategia AIEPI

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    Mario Francisco Delgado

    2006-12-01

    Full Text Available Antecedentes: La Atención Integrada de las Enfermedades Prevalentes en la Infancia (AIEPI es una estrategia que busca disminuir la mortalidad por enfermedades prevalentes en menores de cinco años. En la enfermedad diarreica aguda (EDA, una de sus actividades es promocionar los conocimientos maternos sobre signos de peligro, la búsqueda oportuna de atención y las prácticas adecuadas de hidratación.Objetivo: Establecer los conocimientos maternos sobre signos de peligro en EDA en menores de 5 años y determinar prácticas de hidratación. Métodos: Estudio descriptivo por medio de una encuesta. Se aplicó un instrumento de investigaciones operativas de AIEPI, a 204 cuidadores elegidos consecutivamente que asistieron por primera vez a la consulta de crecimiento y desarrollo de un hospital de nivel I en Popayán, Colombia. Se midieron variables: edad materna, sexo, edad del niño, área (rural-urbana, estrato socioeconómico, vínculo al Sistema Nacional de Seguridad Social en Colombia, escolaridad, número de hijos, convivencia con compañero, convivencia con abuela del menor. La variable conocimientos se determinó de una manera dicotómica: la madre conocía si sabía por lo menos dos signos de peligro en EDA. Se establecieron proporciones y medias para caracterizar la población.Resultados: Del total de las madres, 54% conocen como mínimo dos signos de peligro en EDA. En caso de EDA se emplean líquidos caseros 49%, SRO 49%, suero casero 23%. El convivir con la abuela del niño se asoció significativamente con los conocimientos maternos (p <0.05.Conclusión: La mitad de las madres no conocen signos de peligro y esto hace necesario intervenciones educativas en EDA y difundir la estrategia AIEPI. En estas intervenciones es necesario incluir a las abuelas y a las madres que no conviven con ellas.

  12. Diarrea aguda en trasplantes renales y reno-pancreáticos

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    Alberto A Carena

    2015-02-01

    Full Text Available La diarrea es una complicación frecuente y potencialmente grave del trasplante renal. Se describen aquí, en un estudio de corte transversal, las características epidemiológicas y microbiológicas de la diarrea aguda y persistente en pacientes internados con trasplante renal o reno-páncreas. Se incluyeron 52 pacientes internados en un hospital de la Ciudad de Buenos Aires, 42 (80.8% habían recibido un trasplante renal y 10 (19.2% reno-páncreas. La diarrea fue el motivo de ingreso en 34 casos (65.4%. La etiología de la diarrea pudo estudiarse en 50 pacientes: en 25 (50% no se arribó a un diagnóstico etiológico y en 18 (36% se constató diarrea con causa microbiológica específica: 3 (6% enfermedad por citomegalovirus, 6 (12% diarrea atribuida a citomegalovirus, 5 (10% a rotavirus y 4 (8% a Clostridium difficile. En 7 (14% la diarrea fue atribuida a fármacos (mofetil micofenolato y sirolimus. Aquellos con diarrea con causa microbiológica habían recibido recientemente inmunosupresores a altas dosis con mayor frecuencia que el resto (p = 0.048. Los pacientes con diarrea atribuida a fármacos recibían más frecuentemente mofetil micofenolato (p = 0.039. En 16 (30.8% se realizaron modificaciones de los inmunosupresores como medida terapéutica, y a 47 (90.4% se les indicó antibioticoterapia empírica. La mediana de duración de internación fue de 6 días y 7 pacientes (14.6% persistieron con diarrea al quinto día. Todos tuvieron resolución de la diarrea al alta y un tercio persistió con insuficiencia renal. La información de este estudio puede servir para mejorar las medidas preventivas, diagnósticas y terapéuticas en estos pacientes.

  13. Porfiria aguda intermitente: valor do teste de Watson e Schwartz para o diagnóstico

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    José Lamartine de Assis

    1957-03-01

    Full Text Available É apresentado um caso de Porfiria aguda intermitente em uma jovem de 20 anos do sexo feminino. Os primeiros sintomas - cólicas abdominais periódicas - surgiram aos 15 anos de idade. As complicações neurológicas apareceram logo após um stress cirúrgico condicionado por uma laparotomia. Não havia casos de Porfiria com manifestações clínicas entre os familiares, porém o pai e quatro irmãos eram portadores de porfobilinogênio na urina. Ao exame clínico chamava a atenção o precário estado geral da enfêrma, estando normais os diversos órgãos e aparelhos. A paciente apresentava alterações do humor com depressão, chôro e irritabilidade, e fases de completa apatia. O exame neurológico mostrou tetraplegia flácida sensitivo-motora com desordens esfineterianas. Os exames subsidiários excluíram alterações funcionais hepáticas e renais, mostraram uma leucocitose sem causa infecciosa aparente e uma glicosúria muito discreta e transitória. Dois eletrencefalogramas feitos com intervalo de três meses e coincidindo com fases de piora e de remissão da doença, mostraram disrritmia paroxística difusa; é de notar que a paciente jamais tivera epilepsia ou eqüivalentes. O eletrodiagnóstico e a eletromiografia mostraram grave comprometimento do neurônio motor periférico em quase todos os territórios musculares dos membros. O exame dermatológico revelou lesões cutâneas sem qualquer relação com a Porfiria. O exame anátomo-patológico de peça muscular retirada por biopsia revelou atrofia de músculo esfriado. A eletroforese mostrou, em relação aos valores aceitos como normais, aumento percentual de globulinas com queda da relação albumina-globulina no soro sangüíneo e no liqüido cèfalorraquidiano; em ambos, o aumento das globulinas era devido à elevação dos percentuais das globulinas α2 e γ. Foi demonstrada a presença das co proporfirinas em grande quantidade na urina, e do porfobilinogênio também na urina

  14. Intoxicación aguda por plaguicidas Acute poisoning from pesticides

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    Jaime Jesús Durán-Nah

    2000-02-01

    Full Text Available OBJETIVO: Describir la epidemiología de la intoxicación aguda por plaguicidas (IAP en el Hospital General O'Horán de Mérida, Yucatán, México. MATERIAL Y MÉTODOS: Se revisaron los expedientes de 33 pacientes ³ 13 años, tratados en una unidad de cuidados intensivos (UCI, entre 1994 y 1998. Se recopilaron variables demográficas y clínicas relevantes, y se aplicó estadística descriptiva. RESULTADOS: En la población estudiada predominó el sexo masculino (82% del medio rural (70%, y la edad media fue de 34 ± 15.8 años. El intento de suicidio fue causa frecuente de IAP (79%, y en 33% de los casos la intoxicación se produjo por la utilización de organofosforados. La mortalidad fue de 12%. CONCLUSIONES: La IAP fue baja entre los sujetos del medio rural, por lo que los resultados de este estudio parecen no reflejar la realidad del problema. Es importante añadir que los plaguicidas son utilizados con relativa frecuencia para el intento de suicidio.OBJECTIVE: To describe the epidemiologic pattern of acute pesticide poisoning (APP in a general hospital in Merida, Yucatan, Mexico. MATERIAL AND METHODS: From 1994 to 1998, 33 patients 13 years of age or older with diagnosis of APP were studied. Descriptive statistics were used to analyze information. RESULTS: Males were frequently affected (82%, specially those coming from rural areas (60%. The mean age of the group was 34 ± 15.8 years. In 79% of the cases, pesticides were used to commit suicide and 33% of poisoning cases were due to organophospate pesticides. The mortality rate was 12%. CONCLUSIONS: In this small sample, acute poisoning from pesticides in the agricultural setting may be underestimated, since it was less frequent than in the general population. APP was more commonly used by indigent people to commit suicide.

  15. Hemometabolismo cerebral: variações na fase aguda do coma traumático

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    FALCÃO ANTONIO L. E.

    2000-01-01

    Full Text Available OBJETIVO: avaliar as interrelações entre as alterações hemometabólicas cerebrais e sistêmicas em pacientes com traumatismo craniencefálico (TCE grave submetidos a um protocolo terapêutico padronizado. DESENHO: estudo prospectivo, intervencionista em pacientes com coma traumático. LOCAL: uma UTI geral em hospital universitário. PACIENTES E MÉTODOS: vinte e sete pacientes (21M e 6F, idade 14-58 anos, com TCE grave, com três a oito pontos na escala de coma de Glasgow, foram avaliados prospectivamente segundo um protocolo cumulativo padronizado para tratamento da hipertensão intracraniana aguda, o qual incluía medidas rotineiras da pressão intracraniana (PIC e da extração cerebral de oxigênio (ECO2. Foram analisadas as interrelações hemometabólicas envolvendo: pressão arterial média (PAM, PIC, pressão parcial de gás carbônico arterial (PaCO2, ECO2, pressão de perfusão cerebral (PPC e extração sistêmica de oxigênio (ESO2. INTERVENÇÕES: apenas as padronizadas no protocolo terapêutico. RESULTADOS: não houve correlação entre a ECO2 e a PPC (r = -0,07; p = 0,41. Houve correlação inversa entre a PaCO2 e a ECO2 (r = -0,24; p = 0,005 e direta entre a ESO2 e a ECO2 (r = 0,24; p = 0,01. A mortalidade geral dos pacientes foi de 25,9% (7/27. CONCLUSÃO: 1 a PPC não se correlaciona com a ECO2 em quaisquer níveis de PIC; 2 a ECO2 está estreitamente relacionada aos diferentes níveis de PaCO2 ; e 3 durante a hiperventilação otimizada existe um acoplamento entre a ECO2 e a ESO2.

  16. Bronquiolite aguda, uma revisão atualizada Acute bronchiolitis, an updated review

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    Werther Brunow de Carvalho

    2007-04-01

    Full Text Available A bronquiolite aguda (BA é um diagnóstico freqüente de internação hospitalar em pediatria, ocasionada principalmente pelo vírus sincicial respiratório (VSR. Ocorre epidemicamente nos meses de outono e inverno. Algumas populações de crianças (recém-nascidos pré-termo, cardiopatia congênita, doença pulmonar crônica, imunocomprometidos, desnutridos, entre outros apresentam maior risco de morbidade e mortalidade. Os vírus multiplicam-se nas células epiteliais ciliadas, e a inflamação e os debris celulares ocasionam obstrução da via aérea, hiperinsuflação, atelectasia localizada, chiado e alterações das trocas gasosas. Não existem evidências definitivas em relação aos tratamentos utilizados para esta doença. O tratamento inclui a utilização de oxigênio, hidratação, beta-2 agonistas por via inalatória, epinefrina racêmica, DNase recombinante, fisioterapia respiratória, entre outros. Medidas profiláticas: administração de anticorpos monoclonais (palivizumab. A maioria das crianças com BA, independentemente da gravidade da doença, recuperam-se sem seqüelas. O curso natural desta doença, habitualmente, varia entre sete a dez dias, mas algumas crianças permanecem doentes por semanas.Acute bronchiolitis (AB is a frequent cause of hospitalization among children and its main etiological agent is respiratory syncytial virus (RSV. It occurs epidemically during autumn and winter. Some populations of children such as premature newborns, infants with congenital heart disease and those with chronic lung disease, immunocompromised, undernourished, among others, present increased morbidity and mortality risk. The virus multiplies in epithelial ciliated cells while inflammation and cellular debris cause obstruction of the airways, hyperinflation, atelectasis, and wheezing and gas exchange imbalance. Definitive evidence still does not exist about treatment of this disease, Treatment includes oxygen therapy, hydration

  17. Rinovirus: Frecuencia en niños con infección respiratoria aguda, no internados

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    Débora N. Marcone

    2012-02-01

    Full Text Available Los métodos moleculares para diagnosticar rinovirus humanos (RVH han aumentado la sensibilidad de detección. Esto ha permitido documentar la asociación entre los RVH y las infecciones respiratorias agudas (IRA altas y bajas. La infección por RVH durante la infancia se asoció con posterior desarrollo de asma. Se estudió la frecuencia de RVH en 186 niños menores de 6 años ambulatorios con IRA (alta o baja, durante 2 años consecutivos (1/6/2008 - 31/5/2010. Se correlacionó la presencia de RVH con los antecedentes y características clínico-epidemiológicas. La detección de RVH se realizó con una RT-PCR en tiempo real que amplifica parte de la región 5' no codificante del genoma. Los virus respiratorios clásicos se estudiaron por inmunofluorescencia. En el 61% de los niños se detectó etiología viral. Las frecuencias fueron: RVH 27%, virus sincicial respiratorio (VSR 16%, influenza A y B 9%, parainfluenza 8%, metapneumovirus 7% y adenovirus 0.5%. Se observaron coinfecciones duales en 8 casos, siendo RVH el más frecuente (en 4 de ellos. Los RVH circularon durante todo el período estudiado, con picos en invierno y primavera. No se observaron diferencias clínico-epidemiológicas significativas entre pacientes con o sin RVH, excepto un mayor porcentaje de niños afebriles con RVH. Los RVH fueron los virus más detectados en niños ambulatorios, principalmente en menores de 2 años, los segundos virus asociados a bronquiolitis, luego del VSR, y detectados tres veces más en los niños expuestos a tabaquismo pasivo (OR: 2,91; p = 0.012 que en el resto. Fueron identificados como único agente en el 28% de las bronquiolitis.

  18. Histoplasmose disseminada aguda em indivíduo imunocompetente Acute disseminated histoplasmosis in an immunocompetent patient

    Directory of Open Access Journals (Sweden)

    Simone Castelo Branco Fortaleza

    2004-06-01

    Full Text Available A histoplasmose é uma doença fúngica causada pela inalação de esporos de Histoplasma capsulatum. A maioria dos indivíduos normais não apresenta doença após pequena inalação, porém exposições mais prolongadas podem levar ao desenvolvimento de infecção pulmonar aguda, crônica ou disseminada. Nos pacientes imunocomprometidos a infecção é disseminada e grave. Relatamos o caso de um paciente de treze anos, imunocompetente, com febre, tosse seca e dispnéia progressiva havia dois meses. O radiograma e a tomografia computadorizada de tórax evidenciavam infiltrado intersticial com micronódulos difusos. O paciente relatava contato intenso com pássaros em sua residência. Foi submetido a biópsia pulmonar a céu aberto, que evidenciou Histoplasma capsulatum em tecido pulmonar. A cultura do fragmento da biópsia confirmou a presença de Histoplasma capsulatum sp. O paciente foi tratado com anfotericina-B por 28 dias, seguida de itraconazol por seis meses, com resolução do quadro.Histoplasmosis is a fungal disease caused by inhalation of Histoplasma capsulatum fungus. The disease does not normally affect immunocompetent individuals after a single, transient inhalation exposure. However, longer exposure may cause chronic or disseminated acute pulmonary infection. In immunocompromised patients, the infection is disseminated and severe. We report the case of a 13-year-old immunocompetent patient, presenting with fever, cough and dyspnea for one month. The chest X-ray and computed tomography scan revealed interstitial infiltrate and diffuse micronodules. The patient reported having had close and prolonged contact with birds. He was submitted to an open lung biopsy and the tissue culture was positive for Histoplasma capsulatum sp. He was treated with amphotericin B for 28 days, followed by treatment with itraconazole for 6 months, and there was complete resolution of the disease.

  19. Intoxicación aguda por inhalación de Acrilato de Etilo, Lima 2002

    Directory of Open Access Journals (Sweden)

    Jeannette Ávila VM

    2005-10-01

    Full Text Available Objetivos: Describir las características clínico-epidemiológicas de los casos de intoxicación aguda por inhalación de acrilato de etilo, ocasionado por el manejo clandestino de un envase con restos de ésta sustancia, en una urbanización del distrito Comas, en Lima, Perú en noviembre del año 2002. Materiales y métodos: Estudio transversal analítico realizado en residentes y población del centro educativo aledaño a la zona del accidente. Se realizó una encuesta a todas las personas expuestas, se consideró como caso la presencia de cefalea, irritación ocular, nauseas, dolor abdominal y prurito intenso en el cuerpo. Se caracterizó el accidente en tiempo, espacio y persona. En el centro educativo se exploraron factores de exposición que favorecieron la presencia de intoxicados. Los datos fueron ingresados en Epi Info v 6.0 y analizados en STATA v.8.0 Resultados: Se encuestó 456 residentes y 326 personas en la escuela. La tasa de ataque general fue 21,9%, 46,9% en la escuela y 4,2% en viviendas. Los síntomas predominantes fueron cefalea 56%, irritación ocular 47%, dolor abdominal 42%. El 23% requirió hospitalización. El permanecer en pisos superiores de la escuela fue un factor de riesgo OR 4,54 (IC95% 2,66-7,84 y en el pabellón A OR 3,82 (IC95% 2,33-6,25. Conclusiones: Los síntomas predominantes fueron cefalea, irritación ocular y dolor abdominal. La cercanía a la zona de exposición del cilindro y la dispersión de los vapores tóxicos influyeron para afectar mayormente a la escuela y a aquellos que ocupaban aulas en pisos superiores y el pabellón A. La legislación peruana debe contemplar el problema del manejo clandestino de residuos peligrosos.

  20. Sindrome confusional agudo por abstinencia aguda de nicotina Delirium due to acute nicotine withdrawal

    Directory of Open Access Journals (Sweden)

    Manuel Klein

    2002-08-01

    Full Text Available El síndrome confusional agudo (SCA o delirium en pacientes hospitalizados es un problema frecuente y grave. Se caracteriza por síntomas de comienzo agudo y curso fluctuante con inatención, pensamiento desorganizado, y con distintos niveles de alteración de la conciencia.En la bibliografía consultada, el SCA como manifestación de un síndrome de abstinencia aguda nicotínica fue descripto en solo ocho casos. Presentamos el caso de un tabaquista grave que, internado por una reagudización de su enfermedad pulmonar obstructiva crónica (EPOC, presentó un cuadro de SCA al tercer día de abstinencia tabacal, cediendo los síntomas tras la administración de un parche de nicotina. Lo descripto sugiere que en pacientes internados que presentan SCA y agitación, con fuertes antecedentes de tabaquismo, un simple ensayo con un parche de nicotina puede ofrecer en pocas horas una notable respuesta terapéutica y a su vez un test confirmatorio. El reconocimiento del SCA como forma de presentación de la abstinencia nicotínica permitirá identificar casos habitualmente complejos en los que se podrá implementar una sencilla y eficaz alternativa terapéutica.Delirium or acute confusional state among hospitalized patients is a frequent and serious problem. It is characterized by acute onset symptoms, fluctuating course, impaired attention, unorganized thinking, and altered level of conciousness. Delirium, as a manifestation of acute nicotine withdrawal syndrome has been reported in the reviewed literature only in eight cases. We report the case of a heavy smoker admitted because of a reagudization of his chronic obstructive pulmonary disease. At the third day of nicotine abstinence, he developed delirium with a rapid improvement of his symptoms after treatment with a transdermal nicotine patch. This description suggests that in hospitalized heavy smokers who develop delirium with agitation, a simple trial with a nicotine patch can offer a dramatic

  1. Aportación del análisis inmunofenotípico en la caracterización de la leucemia aguda y en la identificación de subgrupos moleculares

    OpenAIRE

    Muñoz Marín, Luz

    2006-01-01

    Consultable des del TDX Títol obtingut de la portada digitalitzada La leucemia aguda es una alterción clonal de los progenitores hematopoyéticos, con una gran heterogeneidad tando desde el punto de vista clínico como biológico. Actualmente el tratamiento de los pacientes con leucemia aguda se estratifica según factores pronósticos. Disponemos de diversas técnicas útiles en el diagnóstico, clasificación y seguimiento de los enfermos con leucemia aguda y es necesario integrar todas ellas ...

  2. From Radical Translation to Radical Interpretation and Back

    Directory of Open Access Journals (Sweden)

    António Zilhão

    2003-12-01

    Full Text Available Both Quine and Davidson put forth programs of empirical semantics satisfying the conditions that characterize the so-called “standpoint of interpretation.” Quine’s less ambitious program of radical translation rests upon two buttresses: causality and empathy. Davidson’s more ambitious program of radical interpretation replaces causality with truth and empathy with rationality. Although the replacement of causality with intersubjective truth seems to me to be a fully justified move, I nevertheless contend that it is more realistic to develop the work of interpretation drawing upon Quine’s less ambitious requirement of empathy than upon Davidson’s view of human agency as rational agency. In order to substantiate this contention, I present an argument to the effect that Davidson’s characterization of human agency as rational is not compatible with his other requirement that truth should pro-vide the essential link connecting speech with environment and action.

  3. Doenças respiratórias agudas em serviços de saúde entre 1996 e 2001, Fortaleza, CE

    Directory of Open Access Journals (Sweden)

    Façanha Mônica Cardoso

    2004-01-01

    Full Text Available OBJETIVO: As doenças respiratórias agudas, principalmente as pneumonias, são a causa mais importante de óbito em menores de cinco anos e são responsáveis por doença grave nos maiores de 60 anos. O estudo realizado tem como objetivo descrever as principais características epidemiológicas dos casos de doenças respiratórias agudas notificadas pelas unidades de saúde. MÉTODOS: Todos os registros de atendimentos de pacientes com doença respiratória aguda, no período entre 1996 e 2001, foram revistos semanalmente, em formulário específico, a partir dos boletins de atendimento médico preenchidos por 100 unidades públicas de saúde. Os dados foram classificados em não pneumonia e pneumonia por faixa etária. RESULTADOS: Foram informados 2.050.845 casos de doença respiratória aguda no período estudado. Os meses com maior número de casos foram maio e junho. A faixa etária mais acometida foi a de um a quatro anos, com cerca do dobro do número de casos das outras faixas etárias. Pneumonias representaram, aproximadamente, 7,7% dos casos. CONCLUSÕES: O acompanhamento das doenças respiratórias agudas serve para mostrar sua magnitude em termos numéricos, e estimular seu diagnóstico apropriado, tratamento precoce e prevenção, tanto das complicações, quanto de sua ocorrência.

  4. Reaction between protein radicals and other biomolecules

    DEFF Research Database (Denmark)

    Østdal, Henrik; Davies, Michael Jonathan; Andersen, Henrik J

    2002-01-01

    The present study investigates the reactivity of bovine serum albumin (BSA) radicals towards different biomolecules (urate, linoleic acid, and a polypeptide, poly(Glu-Ala-Tyr)). The BSA radical was formed at room temperature through a direct protein-to-protein radical transfer from H(2)O(2......)-activated immobilized horseradish peroxidase (im-HRP). Subsequently, each of the three different biomolecules was separately added to the BSA radicals, after removal of im-HRP by centrifugation. Electron spin resonance (ESR) spectroscopy showed that all three biomolecules quenched the BSA radicals....... Subsequent analysis showed a decrease in the concentration of urate upon reaction with the BSA radical, while the BSA radical in the presence of poly(Glu-Ala-Tyr) resulted in increased formation of the characteristic protein oxidation product, dityrosine. Reaction between the BSA radical and a linoleic acid...

  5. Suspected acute toxoplasmosis in pregnant women Suspeita de toxoplasmose aguda em gestantes

    Directory of Open Access Journals (Sweden)

    Marcela Peres Castilho-Pelloso

    2007-02-01

    Full Text Available OBJECTIVE: To determine the prevalence of reagent serology for suspected acute toxoplasmosis in pregnant women and to describe clinical, laboratory and therapeutic profiles of mothers and their children. METHODS: A retrospective study was conducted with IgM-anti-Toxoplasma gondii-reagent pregnant women and their children who attended the public health system in the state of Paraná, Southern Brazil, from January 2001 to December 2003. Information were obtained from clinical, laboratory (ELISA IgM/IgG and ultrasonographic data and from interviews with the mothers. To test the homogeneity of the IgM indices in relation to the treatment used, the Pearson's Chi-square test was applied. Comparisons were considered significant at a 5% level. RESULTS: Two hundred and ninety (1.0% cases of suspected IgM-reagent infection were documented, with a prevalence of 10.7 IgM-reagent women per 1,000 births. Prenatal care started within the first 12 weeks for 214/290; 146/204 were asymptomatic. Frequent complaints included headaches, visual disturbance and myalgia. Ultrasonography revealed abnormalities in 13 of 204 pregnancies. Chemoprophylaxis was administered to 112/227; a single ELISA test supported most decisions to begin treatment. Pregnant women with IgM indices =2.000 tended to be treated more often. Among exposed children, 44/208 were serologically followed up and all were IgG-reagent, and three IgM-reagent cases showed clinical symptoms. CONCLUSIONS: The existence of pregnant women with laboratorially suspected acute toxoplasmosis who were not properly followed up, and of fetuses that were not adequately monitored, shows that basic aspects of the prenatal care are not being systematically observed. There is need of implementing a surveillance system of pregnant women and their children exposed to T. gondii.OBJETIVO: Determinar a prevalência de gestantes com sorologia reagente suspeita de toxoplasmose aguda e descrever as variáveis maternas e do

  6. Utilidad de la Tomografía Computada helicoidal en la diverticulitis aguda

    Directory of Open Access Journals (Sweden)

    Sebastián Atilio Rossini

    2009-09-01

    Full Text Available Objetivo: Evaluar la utilidad de la tomografía computada helicoidal (TCH en el diagnóstico y manejo terapéutico de la diverticulitis aguda. Materiales y métodos: Estudio de cohorte retrospectivo realizado sobre un periodo de 6 meses que incluyó a 100 pacientes con sospecha clínica de diverticulitis. Se efectuó TCH con contraste oral y endovenoso, salvo contraindicación. Los estudios se correlacionaron con la respuesta terapéutica y el seguimiento clínico y con cirugía e histopatología cuando fue necesario tratamiento quirúrgico. Resultados: De 100 pacientes estudiados, 62 tuvieron diagnóstico tomográfico de diverticulitis; de ellas, 41 fueron diverticulitis simples y 21, complicadas (absceso, flemón, plastrón, perforación libre, fístula vésicocolónica y obstrucción intestinal; en 24 pacientes se realizó diagnóstico alternativo (apendicitis, apendagitis, colitis inespecífica, colitis isquémica, pielonefritis, litiasis ureteral, pancreatitis, salpingitis, quiste de uraco complicado, obstrucción colónica mecánica y perforación colónica por cuerpo extraño y en 14, diagnóstico de ausencia de diverticulitis aguda, sin diagnóstico alternativo, siendo dos de ellos falsos negativos por clínica y respuesta al tratamiento. La TCH para la diverticulitis demostró: sensibilidad: 96,87%; especificidad: 100%; valor predictivo positivo: 100%; valor predictivo negativo: 94,7%; certeza: 98%. De los 41 pacientes con diagnóstico tomográfico de diverticulitis no complicada, 37 recibieron tratamiento médico ambulatorio y 4, tratamiento médico con internación; de los 21 pacientes con diagnóstico de diverticulitis complicada, 18 realizaron un tratamiento médico con internación y en 3 se tomó una conducta quirúrgica; de los 14 pacientes con ausencia de hallazgos tomográficos de diverticulitis, en 12 se adoptó una conducta expectante ambulatoria y 2 recibieron tratamiento médico ambulatorio. Conclusión: La tomografía es

  7. Electron attachment to fluorocarbon radicals

    Science.gov (United States)

    Shuman, Nicholas

    2014-10-01

    Most plasma environments contain populations of short-lived species such as radicals, the chemistry of which can have significant effects on the overall chemistry of the system. However, few experimental measurements of the kinetics of electron attachment to radicals exist due to the inherent difficulties of working with transient species. Calculations from first principles have been attempted, but are arduous and, because electron attachment is so sensitive to the specifics of the potential surface, their accuracy has not been established. Electron attachment to small fluorocarbon radicals is particularly important, as the data are needed for predictive modeling of plasma etching of semiconductor materials, a key process in the industrial fabrication of microelectronics. We have recently developed a novel flowing afterglow technique to measure several types of otherwise difficult to study plasma processes, including thermal electron attachment to radicals. Variable Electron and Neutral Density Attachment Mass Spectrometry (VENDAMS) exploits dissociative electron attachment in a weakly ionized plasma as a radical source. Here, we apply VENDAMS to a series of halofluorocarbon precursors in order to measure the kinetics of thermal electron attachment to fluorocarbon radicals. Results are presented for CF2, CF3, C2F5,C2F3,1-C3F7, 2-C3F7, and C3F5 from 300 K to 900 K. Both the magnitude and the temperature dependences of rate coefficients as well as product branching between associative and dissociative attachment are highly system specific; however, thermal attachment to all species is inefficient, never exceeding 5% of the collision rate. The data are analyzed using a recently developed kinetic modeling approach, which uses extended Vogt-Wannier theory as a starting point, accounts for dynamic effects such as coupling between the electron and nuclear motions through empirically validated functional forms, and finally uses statistical theory to determine the fate of

  8. Radical carbonylations using a continuous microflow system

    Directory of Open Access Journals (Sweden)

    Takahide Fukuyama

    2009-07-01

    Full Text Available Radical-based carbonylation reactions of alkyl halides were conducted in a microflow reactor under pressurized carbon monoxide gas. Good to excellent yields of carbonylated products were obtained via radical formylation, carbonylative cyclization and three-component coupling reactions, using tributyltin hydride or TTMSS as a radical mediator.

  9. Oxygen free radicals in rheumatoid arthritis

    NARCIS (Netherlands)

    P. Biemond (Pieter)

    1986-01-01

    textabstractCurrent knowledge strongly suggests that oxygen free radicals are involved in the pathogenesis of RA. Additional information about the mechanism of free radical attack is necessary in order to find out if interaction with the mechanism of free radical damage can be used in the treatment

  10. Acute renal failure after massive honeybee stings Insuficiência renal aguda após numerosas picadas de abelhas

    Directory of Open Access Journals (Sweden)

    Elizabeth De Francesco Daher

    2003-01-01

    Full Text Available Two clinical cases of patients who survived after numerous attacks of Africanized bees (600 and 1500 bee stings, respectively are reported. Clinical manifestation was characterized by diffuse and widespread edema, a burning sensation in the skin, headache, weakness, dizziness, generalized paresthesia, somnolence and hypotension. Acute renal failure developed and was attributed to hypotension, intravascular hemolysis, myoglobinuria due to rhabdomyolysis and probably to direct toxic effect of the massive quantity of injected venom. They were treated with antihistaminic, corticosteroids and fluid infusion. One of them had severe acute renal failure and dialysis was required. No clinical complication was observed during hospital stay and complete renal function recovery was observed in both patients. In conclusion, acute renal failure after bee stings is probably due to pigment nephropathy associated with hypovolemia. Early recognition of this syndrome is crucial to the successful management of these patients.Foram relatados dois casos clínicos de pacientes que sobreviveram a ataques maciços de abelhas africanizadas (600 e 1500 picadas. As reações caracterizaram-se por edema difuso e generalizado, sensação de queimação na pele, cefaléia, fraqueza, parestesia generalizada, sonolência e hipotensão. A insuficiência renal aguda desenvolveu-se, tendo sido atribuída à hipotensão, hemólise intravascular, mioglobinúria devido à rabdomiólise e provavelmente ao efeito tóxico direto da grande quantidade de veneno injetada. Os pacientes foram tratados com agentes anti-histamínicos, corticosteróides e reposição hídrica. Um paciente apresentou quadro grave de insuficiência renal aguda necessitando de tratamento dialítico. Nenhuma complicação clínica foi observada durante a internação e ambos evoluíram bem com recuperação completa da função renal. Assim, a insuficiência renal aguda após picadas de abelhas ocorre provavelmente

  11. Estrategia de atención de niños hospitalizados por infecciones respiratorias agudas bajas

    Directory of Open Access Journals (Sweden)

    Ana M Ferrari

    2002-06-01

    Full Text Available OBJETIVO: Mejorar la calidad de la atención hospitalaria de los niños con infecciones respiratorias agudas bajas, aumentar los conocimientos sobre esa patología y mejorar la eficiencia en el uso de los recursos asistenciales, por medio de una estrategia que se denominó Plan de Invierno.MÉTODOS: La estrategia se basó en la utilización de protocolos de diagnóstico y tratamiento, internación por cuidados progresivos y por enfermedad, adecuación de los recursos asistenciales y creación de un sistema de registro permanente, informatizado. Se incorporó la investigación sistemática de la etiología viral para racionalizar el uso de la medicación y reducir las infecciones intrahospitalarias. RESULTADOS: Durante la aplicación del Plan (19/V-19/IX/99 ingresaron 3.317 niños; 1.347 (40.61% presentaban infecciones respiratorias agudas bajas. Se captaron 1.096 (81%, de los cuales 71% eran menores de un año. Predominaron las infecciones respiratorias virales (68%. Los criterios de ingreso fueron saturación de oxígeno <95%, polipnea, tiraje o derrame pleural en el 92.4% de los niños. La magnitud de la demanda impidió que las pautas de aislamiento individual o en grupo se cumplieran en todos los casos. El uso de la medicación se ajustó a lo recomendado en un elevado porcentaje: no recibieron antibióticos 73% de las bronquiolitis ni 72% de las neumonías virales, y 96% de las neumonias bacterianas los recibieron según pauta; se redujo el uso de broncodilatadores y de corticoides. El gasto en medicamentos disminuyó fundamentalmente en el grupo de los corticoides y tuvo el mayor impacto en el costo por día/cama de antibióticos. CONCLUSIONES: Disminuir la morbimortalidad por infecciones respiratorias agudas bajas requiere continuar mejorando la calidad de la atención hospitalaria y fortalecer los programas de promoción de salud y de control de las enfermedades prevalentes, en el primer nivel de atención.

  12. Estrategia de atención de niños hospitalizados por infecciones respiratorias agudas bajas

    Directory of Open Access Journals (Sweden)

    Ferrari Ana M

    2002-01-01

    Full Text Available OBJETIVO: Mejorar la calidad de la atención hospitalaria de los niños con infecciones respiratorias agudas bajas, aumentar los conocimientos sobre esa patología y mejorar la eficiencia en el uso de los recursos asistenciales, por medio de una estrategia que se denominó Plan de Invierno.MÉTODOS: La estrategia se basó en la utilización de protocolos de diagnóstico y tratamiento, internación por cuidados progresivos y por enfermedad, adecuación de los recursos asistenciales y creación de un sistema de registro permanente, informatizado. Se incorporó la investigación sistemática de la etiología viral para racionalizar el uso de la medicación y reducir las infecciones intrahospitalarias. RESULTADOS: Durante la aplicación del Plan (19/V-19/IX/99 ingresaron 3.317 niños; 1.347 (40.61% presentaban infecciones respiratorias agudas bajas. Se captaron 1.096 (81%, de los cuales 71% eran menores de un año. Predominaron las infecciones respiratorias virales (68%. Los criterios de ingreso fueron saturación de oxígeno <95%, polipnea, tiraje o derrame pleural en el 92.4% de los niños. La magnitud de la demanda impidió que las pautas de aislamiento individual o en grupo se cumplieran en todos los casos. El uso de la medicación se ajustó a lo recomendado en un elevado porcentaje: no recibieron antibióticos 73% de las bronquiolitis ni 72% de las neumonías virales, y 96% de las neumonias bacterianas los recibieron según pauta; se redujo el uso de broncodilatadores y de corticoides. El gasto en medicamentos disminuyó fundamentalmente en el grupo de los corticoides y tuvo el mayor impacto en el costo por día/cama de antibióticos. CONCLUSIONES: Disminuir la morbimortalidad por infecciones respiratorias agudas bajas requiere continuar mejorando la calidad de la atención hospitalaria y fortalecer los programas de promoción de salud y de control de las enfermedades prevalentes, en el primer nivel de atención.

  13. DNA binding hydroxyl radical probes

    Energy Technology Data Exchange (ETDEWEB)

    Tang, Vicky J.; Konigsfeld, Katie M.; Aguilera, Joe A. [Department of Radiology, University of California at San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0610 (United States); Milligan, Jamie R., E-mail: jmilligan@ucsd.edu [Department of Radiology, University of California at San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0610 (United States)

    2012-01-15

    The hydroxyl radical is the primary mediator of DNA damage by the indirect effect of ionizing radiation. It is a powerful oxidizing agent produced by the radiolysis of water and is responsible for a significant fraction of the DNA damage associated with ionizing radiation. There is therefore an interest in the development of sensitive assays for its detection. The hydroxylation of aromatic groups to produce fluorescent products has been used for this purpose. We have examined four different chromophores, which produce fluorescent products when hydroxylated. Of these, the coumarin system suffers from the fewest disadvantages. We have therefore examined its behavior when linked to a cationic peptide ligand designed to bind strongly to DNA. - Highlights: > Examined four aromatic groups as a means to detect hydroxyl radicals by fluorescence. > Coumarin system suffers from the fewest disadvantages. > Characterized its reactivity when linked to a hexa-arginine peptide.

  14. Osteomielite hematogênica aguda em Pediatria: análise de casos atendidos em hospital universitário Osteomielitis hematogénica aguda en Pediatría: análisis de casos atendidos en hospital universitario Pediatric acute hematogenous osteomyelitis: analysis of patients assisted in a university hospital

    OpenAIRE

    Pedro Fiorini Puccini; Maria Aparecida G Ferrarini; Antônio Vladir Iazzetti

    2012-01-01

    OBJETIVO: Descrever a ocorrência, a evolução e o desfecho de pacientes com osteomielite hematogênica aguda na faixa etária pediátrica. MÉTODOS: Estudo descritivo de 21 casos de pacientes de zero a 14 anos com diagnóstico de osteomielite hematogênica aguda, em acompanhamento no Ambulatório de Infectologia Pediátrica da Escola Paulista de Medicina entre 2005 e 2009. A coleta de dados ocorreu pelo levantamento de prontuários. Realizaram-se a análise descritiva e o teste de correlação de Spearman...

  15. Free radicals and Dupuytren's contracture.

    OpenAIRE

    Murrell, G. A.; Francis, M. J.; Bromley, L.

    1987-01-01

    The concentration of substrate expressed as hypoxanthine capable of reacting with xanthine oxidase to release superoxide free radicals (O2-) was measured in control and Dupuytren's contracture palmar fascia. In Dupuytren's contracture palmar fascia the concentration of hypoxanthine was six times that of control and was greatest in "nodular" areas. Xanthine oxidase activity was also detected in Dupuytren's contracture palmar fascia. These results suggest a greater potential for hypoxanthine-xa...

  16. Geoscientists and the Radical Middle

    Science.gov (United States)

    Tinker, S. W.

    2015-12-01

    Addressing the great challenges facing society requires industry, government, and academia to work together. I call this overlap space, where compromises are made and real solutions determined, the Radical Middle. Radical because it can appear at times as if the loudest and most publicly influential voices lie outside of the actual solution space, content to provoke but not problem-solve. One key area where geoscientists can play a lead role in the Radical Middle is in the overlap between energy, the environment, and the economy. Globally, fossil fuels still represent 85% of the aggregate energy mix. As existing conventional oil and natural-gas reservoir production continues to slowly decline, unconventional reservoirs, led today by shale and other more expensive resources, will represent a growing part of the oil and gas production mix. Many of these unconventional reservoirs require hydraulic fracturing. The positive economic impact of hydraulic fracturing and associated natural gas and oil production on the United States economy is well documented and undeniable. Yet there are environmental concerns about fracking, and some states and nations have imposed moratoria. This energy-environment-economy space is ideal for leadership from the geosciences. Another such overlap space is the potential for geoscience leadership in relations with China, whose economy and global presence continue to expand. Although China is building major hydropower and natural-gas power plants, as well as nuclear reactors, coal is still king—with the associated environmental impacts. Carbon sequestration—onshore in brine and to enhance oil recovery, as well as offshore—could prove viable. It is vital that educated and objective geoscientists from industry, government, and academia leave their corners and work together in the Radical Middle to educate the public and develop and deliver balanced, economically sensible energy and environmental strategies.

  17. Uncária tomentosa e a lesão renal aguda isquêmica em ratos

    Directory of Open Access Journals (Sweden)

    Maria de Fátima Fernandes Vattimo

    2011-03-01

    Full Text Available O objetivo deste estudo foi avaliar o efeito renoprotetor do fitoterápico Uncaria tomentosa sobre a lesão renal aguda isquêmica induzida pelo clampeamento dos pedículos renais de ratos. A hipóxia e a hipoperfusão geradas com a isquemia intensificam a produção de espécies reativas já presentes no processo inflamatório. Os resultados mostraram que a função renal avaliada pelo clearance de creatinina, a excreção de peróxidos urinários (FOX e a excreção urinária de malondealdeído (TBARS desses animais apresentou renoproteção induzida pela UT, provavelmente relacionada às suas atividades antioxidantes.

  18. Efecto del ejercicio físico basado en el juego en la leucemia linfocítica aguda

    OpenAIRE

    González García, Laura Ximena; Escobar Zabala, Paola Andrea

    2012-01-01

    Objetivo: Establecer el efecto de un programa de ejercicio físico (EF) basado en el juego sobre el Síndrome de Desacondicionamiento Físico (SDF) de niños con Leucemia Linfocítica Aguda (LLA) entre 5-12 años. Materiales y Métodos: Se realizó un estudio cuasi-experimental con la participación de siete niños tratados por LLA en el Instituto Nacional de Cancerología (INC). Se hizo una evaluación inicial de los determinantes de la condición física (capacidad aeróbica, fuerza muscular, flexibil...

  19. Toxicidad aguda oral y subcrónica en ratas de un extracto acuoso liofilizado de Ocimum tenuiflorum L

    OpenAIRE

    A. Lagarto; J Tillán; V. Bueno; I Chávez; Guerra, I; Vega, Y; Valdés, O.; T Gabilondo

    2005-01-01

    El potencial tóxico de un extracto acuoso liofilizado fue evaluado mediante el ensayo de toxicidad aguda oral y subcrónica a 90 días en ratas Wistar de ambos sexos. Los métodos empleados fueron los descritos por las normas OECD. En el ensayo agudo se administró por vía oral la dosis de 2000 mg/kg y en el ensayo subcrónico 250, 500 y 1000 mg/kg/día durante 13 semanas. Se evaluaron los signos tóxicos y peso corporal en ambos ensayos. En el estudio subcrónico además se evalu...

  20. Intercambio gaseoso en el síndrome de dificultad respiratoria aguda Gas exchange in acute respiratory distress syndrome

    OpenAIRE

    G. A. Raimondi

    2003-01-01

    El síndrome de dificultad respiratoria aguda (ARDS) se caracteriza por presentar alteraciones severas del intercambio gaseoso (IG) causadas por «shunt» e importante irregularidad de la ventilación perfusión (V A/Q). Esto es consecuencia del edema intersticial y el colapso y ocupación alveolar. Además de la fracción inspirada de oxígeno y la evolución de la patología pulmonar, hay distintas variables que son capaces de alterar la presión parcial de oxígeno arterial (PaO2). Es así que los cambi...

  1. Oclusão arterial aguda por derivados da ergotamina Acute arterial occlusion caused by ergotamine derivatives

    OpenAIRE

    Edison Barreto de Souza; Márcia Marinho Gomes de Araújo

    2009-01-01

    Os derivados da ergotamina compõem diversas drogas amplamente utilizadas no tratamento de ataques agudos de migrânea. A intoxicação por estas substâncias resulta geralmente de sua administração crônica, promovendo sintomas secundários ao espasmo arterial e à consequente isquemia distal. Neste artigo, é relatado o caso de uma paciente de 47 anos com diagnóstico de oclusão arterial aguda em membros inferiores secundária ao uso de derivados da ergotamina. Após a suspensão da droga e a prescrição...

  2. Resultados del tratamiento de leucemia linfoblástica aguda en niños.

    Directory of Open Access Journals (Sweden)

    Margarita Quintero de Charry

    2009-10-01

    Full Text Available El objetivo general de este estudio fue evaluar los resultados de las fases de inducción, consolidación y reinducción del tratamiento de la leucemia linfoblástica aguda (LLA, utilizado en el Hospital Universitario del Valle (HUV, durante el período comprendido entre enero, 1993 y abril, 1999. Se estudiaron 2 grupos de niños con LLA: 52 de bajo riesgo y 57 de alto riesgo. Se asignaron a diferentes protocolos de quimioterapia, de acuerdo con los criterios de clasificación de riesgo establecidos. Se utilizaron la prueba de chi cuadrado (c2 y la prueba exacta de Fisher para analizar las características de cada cohorte. Se obtuvieron riesgos relativos e intervalos de confianza del 95% para evaluar la asociación entre la edad, el recuento de leucocitos al momento del diagnóstico, la morfología Franco-Américo-Británica (FAB, y la presencia de remisión completa al final de la inducción, con el desarrollo de recaídas, remisión sostenida y muerte. El análisis de supervivencia libre de eventos se realizó con el método de Kaplan-Meier y se compararon las curvas utilizando la prueba de "log rank". No se encontraron diferencias estadísticamente significativas en las tasas de remisión completa entre el grupo de bajo riesgo (94.2% y el de alto riesgo (89.4% (p=0.36; 71% de los niños que lograron remisión completa, permanecieron en remisión sostenida (p=0.00. La incidencia acumulada de recaídas fue mayor en los niños de alto riesgo que en los de bajo riesgo (RR 2.2; IC 95% 1.10-4.70; 94.9% de los pacientes que no hicieron recaídas lograron permanecer en remisión sostenida hasta el final del período de observación (p=0.00. La supervivencia libre de eventos fue más pobre en el grupo de bajo riesgo (40% que en el de riesgo alto (50%, prueba de "log rank"=0.049. Desde el punto de vista biológico, los niños de bajo riesgo deberían tener una mejor supervivencia que los de alto riesgo, como se informa en la literatura. La pobre

  3. LETTING GO: DE-RADICALIZATION IN EGYPT

    Directory of Open Access Journals (Sweden)

    Zeynep Kaya

    2016-03-01

    Full Text Available The literature on the causes of how terrorist organizations are formed and how counter terrorism measures can be more effective is immense. What is novel in terrorism literature is de-radicalization in terrorist organizations. This paper hopes to shed light on the de-radicalization process in terrorist organizations based in Egypt. In order to achieve that goal, the first part of the paper will deal with the de-radicalization process. The second part will briefly describe the major radical terrorist organizations that are effective in Egypt. The last part will combine the two parts and bring in suggestions on the de-radicalization process itself. Terrorism and de-radicalization are complicated threats to nearly all societies. Therefore, it is important to go beyond security and intelligence approaches and take proactive measures. It is best to view what is de-radicalization and how it can be achieved.

  4. Oxidative stress, free radicals and protein peroxides.

    Science.gov (United States)

    Gebicki, Janusz M

    2016-04-01

    Primary free radicals generated under oxidative stress in cells and tissues produce a cascade of reactive secondary radicals, which attack biomolecules with efficiency determined by the reaction rate constants and target concentration. Proteins are prominent targets because they constitute the bulk of the organic content of cells and tissues and react readily with many of the secondary radicals. The reactions commonly lead to the formation of carbon-centered radicals, which generally convert in vivo to peroxyl radicals and finally to semistable hydroperoxides. All of these intermediates can initiate biological damage. This article outlines the advantages of the application of ionizing radiations to studies of radicals, with particular reference to the generation of desired radicals, studies of the kinetics of their reactions and correlating the results with events in biological systems. In one such application, formation of protein hydroperoxides in irradiated cells was inhibited by the intracellular ascorbate and glutathione.

  5. Acute myeloid leukaemia induced by mitoxantrone: case report Leucemia mielóide aguda induzida por mitoxantrone: relato de caso

    Directory of Open Access Journals (Sweden)

    Walter Oleschko Arruda

    2005-06-01

    Full Text Available Mitoxantrone (MX is an immunosupressant drug used in secondarily progressive multiple sclerosis (SPMS and in relapsing-remitting multiple sclerosis (RRMS. It has a leukemogenesis potential induced by cytogenetic abnormalities, though with a low incidence. Promyelocitic leukaemia (type M3 and other forms of acute myeloblastic leukaemias (M4 and M5 have been described in a few MS patients who received MX during their treatment. We describe a white female patient, 47 year-old, with SPMS (EDSS = 4 with 14 years of disease. She received MX during her disease and developed acute promyelocytic leukaemia (M3, with severe thrombocytopenia 30 months later. She ultimately died due to intracerebral hemorrhage. Other cases of treatment related to AML are reviewed and discussed.Mitoxantrone (MX é uma agente imunossupressor utilizado nas formas progressivas secundárias de esclerose múltipla (EM ou formas surto-remissão sem resposta com outras formas de tratamento (p.ex. beta-interferon, acetato de glatirâmer. Com o uso desta medicação, ocorre uma incidência maior, embora pequena, de desenvolvimento de leucemia mielóide aguda induzida por quimioterápicos. Descrevemos o caso de uma paciente com forma progressiva secundária de EM, submetida a uma dose única de MX de 15mg e que 30 meses após desenvolveu quadro fulminante de leucemia promieloblástica aguda (M3, com trombocitopenia grave. A paciente faleceu por hemorragia intracerebral maciça. É feita revisão de outros casos relatados na literatura e os possíveis mecanismos de desenvolvimento desta complicação grave secundária ao uso do MX.

  6. Cirurgia conservadora da endocardite bacteriana aguda da valva tricúspide Conservative operation for bacterial endocardites of the tricuspide valve

    Directory of Open Access Journals (Sweden)

    Iseu Affonso da Costa

    1988-08-01

    Full Text Available É relatado o caso de 1 paciente que apresentou endocardite aguda da valva tricúspide pós-aborto, cujo agente causal era o S. aureus. Como não houvesse resposta favorável ao tratamento antibiótico (gentamicina, vancomicina e oxacilina, optou-se pela intervenção, vinte dias após a internação. Foi praticada excisão de uma vegetação única e do tecido valvar adjacente, na comissura ântero-posterior e plicatura anular. O resultado foi favorável, com cura clínica. O exame ecocardiográfico confirmou a presença da vegetação no pré-operatório e o funcionamento conservado da valva, após a plastia. O tratamento cirúrgico, com retirada do tecido infectado e preservação da valva constitui uma alternativa aplicável a certos casos de endocardite aguda das valvas atrioventriculares.One case of acute bacterial endocarditis of the tricuspid valve caused by S. aureus and following a septic abortion is presented. Surgical treatment was indicated after failure of antibiotics. Operation consisted of excision of a large vegetation adherent to the anterior and posterior cusps at the commisure and of the affected valvar tissue. Annular plicature at the segment corresponding to the posterior cuspid was employed to maintain competence. Clinical result was very satisfactory with resolution of sepsis. Dopplerecocardiography revealed the presence of the vegetation before the operation and showed a small regurgitation after valvoplasty. Conservative operation upon the atrioventricular valves must be kept in mind as an alternative in the treatment of acute bacterial endocarditis.

  7. Daño pulmonar agudo relacionado con la transfusión (Trali y Bartonelosis aguda

    Directory of Open Access Journals (Sweden)

    Douglas López de Guimaraes

    2006-07-01

    Full Text Available Se presenta el caso de un varón de 22 años procedente de la periferia de la ciudad de Huaraz, Perú, que acude al Hospital "Victor Ramos Guardia" de Huaraz con un tiempo de enfermedad de 14 días, febril, pálido e ictérico, en el frotis de sangre periférica se encuentran formas bacilares de Bartonella bacilliformis en 99% de la lámina; se inicia tratamiento antibiótico con ceftriaxona y ciprofloxacino. Al día siguiente se le indica transfusión de dos paquetes globulares (puesto que tenía 6,2 g/dL de Hb, dos horas después presenta dolor toráxico, tos seca exigente, vómitos, dificultad respiratoria y cianosis, en la auscultación se encuentran roncantes y crepitantes, la radiografía de tórax muestra infiltrado alveolar difuso a predominio derecho. Es trasladado a la UCI donde recibe oxígeno con máscara de reservorio, dopamina, corticoides y se inicia el monitoreo hemodinámico; responde en forma satisfactoria, sale de alta con frotis negativo a Bartonella bacilliformis. Es el primer caso de daño pulmonar agudo relacionado con la transfusión (TRALI asociado con Bartonelosis aguda con cuadro clínico - radiológico y evolución compatible, es importante distinguir entre la complicación pulmonar debido a la sepsis grave por Bartonelosis aguda, que puede producir un cuadro clínico similar y el TRALI.

  8. Resposta de fase aguda, subnutrição e estado nutricional do ferro em adultos com AIDS

    Directory of Open Access Journals (Sweden)

    Monteiro Jacqueline Pontes

    2000-01-01

    Full Text Available Foram comparados o estado nutricional e parâmetros do metabolismo do ferro de adultos HIV-positivos, com ou sem resposta de fase aguda (RFA. Adultos HIV-positivos (n = 29 submeteram-se a antropometria, recordatório alimentar e determinação sérica de albumina, proteína C reativa (PCR, ferritina e capacidade total de ligação do ferro (CTLF, além de creatinina urinária. Infecção mais PCR > 7mg/dl foram critérios de positividade da RFA. Índice de massa corporal (IMC < 18,5kg/m2 e índice creatinina-altura (ICA < 70% definiram subnutrição. Subnutrição (77,8 vs 40% e tuberculose pulmonar (44,4 vs 9,5% foram mais freqüentes nos pacientes RFA-positivos, que também apresentaram menores níveis de albumina (3,7 ± 0,9 vs 4,3 ± 0,9g/dl, CTLF (165,8 ± 110,7 vs 265,9 ± 74,6mg/dl e hemoglobina (10,5± 1,8 vs 12,6 ± 2,3g/dl. A ingestão de ferro foi adequada e similar entre RFA-positivos e RFA-negativos, o mesmo ocorrendo, respectivamente, quanto à ferritina sérica (mediana; variação, 568; 45,3-1814 vs 246; 18,4-1577ng/ml. Pacientes HIV-positivos com resposta de fase aguda são nutricionalmente mais comprometidos e têm anemia que parece não depender da ingestão recente de ferro.

  9. Online radicalization: the net or the netizen?

    Directory of Open Access Journals (Sweden)

    Femi Richard Omotoyinbo

    2014-10-01

    Full Text Available Purpose - Radicalization has gained some unusual prominence in the academic circles; maintaining a generic existence not only in the political sector. And with the advent of the Information Communication Technology (ICT, radicalization has begun to have some virtual dimension even in the remotest of human communities. This study seeks to mobilize a universal awareness on the collective urgency to oppose Online Radicalization (a radicalization that happens through the internet due to its propensity to engendering conflicts. It also aims at identifying the principal cause of online radicalization and steer a clear course for a practical reversal in the systems of online radicalization.Design/methodology/approach - The study is divided into three primary parts. The general notion of radicalization is the focus of the first part; which is further analysed into the levels of online radicalization with its accompanying developments and segments. The second part utilizes analytic and historical method to pinpoint the principal cause of online radicalization amidst the suspected causal factors (the Net and the Netizen. The final part analytically focuses on the Netizen (a user/citizen of the internet as the primary cause of online radicalization, and how the global community can bring about a corresponding change in the Net by the application of some measures on the Netizen.Findings - By virtue of the analytic plus historical methods employed by this study; it was initially identified that radicalization is basically having two versions which are online and offline. Further emphasis on the online version reveals that its existence is only made possible by the availability of the internet (the Net. Since the Net is a global phenomenon online radicalization is considered to be worldwide: a menace of globalization. However, the study later indicated that the Net is a facilitator and a cause of online radicalization. A view was deduced that the Netizen is

  10. Radical conservatism and Danish imperialism

    DEFF Research Database (Denmark)

    2013-01-01

    on the basis of a close reading of their imperialist program in the pamphlet Danmark Udslettes! from 1918. Rige had been a vague term for the larger Danish polity that originated in a pre-national conceptualization of the polity as a realm. The article suggests that rige-as-realm was translated by the radical...... to signify the ambition of being a great power, the spiritual elevation of the nation through the transcendence of the decaying liberal modernity. The program addressed the tension between a conservative political attitude and modernity and thus signified a kind of reactionary modernism, which rejected...

  11. Aromatic-radical oxidation chemistry

    Energy Technology Data Exchange (ETDEWEB)

    Glassman, I.; Brezinsky, K. [Princeton Univ., NJ (United States)

    1993-12-01

    The research effort has focussed on discovering an explanation for the anomalously high CO{sub 2} concentrations observed early in the reaction sequence of the oxidation of cyclopentadiene. To explain this observation, a number of plausible mechanisms have been developed which now await experimental verification. One experimental technique for verifying mechanisms is to probe the reacting system by perturbing the radical concentrations. Two forms of chemical perturbation of the oxidation of cyclopentadiene were begun during this past year--the addition of NO{sub 2} and CO to the reacting mixture.

  12. Laser spectroscopy of hydrocarbon radicals

    Energy Technology Data Exchange (ETDEWEB)

    Chen, P. [Harvard Univ., Cambridge, MA (United States)

    1993-12-01

    The author reports the application of supersonic jet flash pyrolysis to the specific preparation of a range of organic radicals, biradicals, and carbenes in a skimmed molecular beam. Each species was produced cleanly and specifically, with little or no secondary reactions by the thermal dissociation of appropriately designed and synthesized organic precursors. Photoelectron spectra of the three isomeric C{sub 3}H{sub 2} carbenes, ortho-benzyne, and the {alpha},3-dehydrotoluene biradical, were used to establish adiabatic ionization potentials for use in thermochemical determinations.

  13. Free radical kinetics of irradiated durum wheat

    Science.gov (United States)

    Korkmaz, M.; Polat, M.

    2000-04-01

    In the present work, a detailed ESR investigation of characteristic features and kinetic behaviors at three different temperatures of free radicals produced in a species of durum wheat cultivated in Turkey and irradiated at doses of up to 5 kGy by a γ source, is reported. Unirradiated wheat samples exhibit a weak, single-line ESR signal originating from a radical of unknown structure called radical III in this work. Irradiation produces two more radicals identified as hydroxyalkyl (I) and aldehydalkyl (II) radicals beside radical III. The radicals (I, II and III) follow complicated kinetics. Species I and II initially decay very fast after the irradiation followed by slower decay. Radical half-life times depend on whether they were induced in the crystalline or amorphous fractions of the wheat starch. Activation energy values of the radicals were found to follow the order Ea(III)> Ea(II)> Ea(I). ESR parameters of the radical species were determined by simulating experimental spectra recorded following the irradiation. Room temperature dose-response curves and variations of different spectral parameters between 120 and 390 K were also studied.

  14. Radical constructivism: Between realism and solipsism

    Science.gov (United States)

    Martínez-Delgado, Alberto

    2002-11-01

    This paper criticizes radical constructivism of the Glasersfeld type, pointing out some contradictions between the declared radical principles and their theoretical and practical development. These contradictions manifest themselves in a frequent oscillation between solipsism and realism, despite constructivist claims to be an anti-realist theory. The paper also points out the contradiction between the relativism of the radical constructivist principles and the constructivist exclusion of other epistemological or educational paradigms. It also disputes the originality and importance of the radical constructivist paradigm, suggesting the idea of an isomorphism between radical constructivist theory and contemplative realism. In addition, some pedagogical and scientific methodological aspects of the radical constructivist model are examined. Although radical constructivism claims to be a rational theory and advocates deductive thinking, it is argued that there is no logical deductive connection between the radical principles of constructivism and the radical constructivist ideas about scientific research and learning. The paper suggests the possibility of an ideological substratum in the construction and hegemonic success of subjective constructivism and, finally, briefly advances an alternative realist model to epistemological and educational radical constructivism.

  15. Detection of a secondary muoniated radical

    Energy Technology Data Exchange (ETDEWEB)

    McCollum, Brett M.; Brodovitch, Jean-Claude [TRIUMF and Department of Chemistry, Simon Fraser University, Burnaby, BC, V5A 1S6 (Canada); Clyburne, Jason A.C. [Department of Chemistry, Saint Mary' s University, Halifax, NS, B3H 3C3 (Canada); Percival, Paul W., E-mail: percival@sfu.c [TRIUMF and Department of Chemistry, Simon Fraser University, Burnaby, BC, V5A 1S6 (Canada); West, Robert [Organosilicon Research Center, University of Wisconsin, Madison, WI 53706 (United States)

    2009-04-15

    Muoniated free radicals are formed by addition of muonium to unsaturated molecules. Successful detection by transverse-field muon spin rotation (muSR) usually requires pure or highly concentrated samples and a muonium reaction rate in excess of 10{sup 9} M{sup -1}s{sup -1} to ensure that the muon spin polarization is coherently transferred to the radical. For this reason muoniated radicals reported to date are all the primary radical products of Mu reaction. Thus, it was expected that Mu addition to a silylene would result in detection of a silyl radical. However, the muon hyperfine constant determined by experiment is much smaller than the value predicted by density functional calculations. Instead, it is consistent with a disilanyl radical, the secondary radical formed by reaction of the initially formed silyl radical with a second silylene molecule. From an analysis of the signal amplitude it was deduced that the second-order rate constant for reaction of the muoniated silyl radical with the parent silylene is 5.7x10{sup 8} M{sup -1}s{sup -1}. This work represents the first example of direct detection of a secondary radical product by transverse-field muSR.

  16. Insuficiência renal aguda em pacientes com sepse grave: fatores prognósticos = Acute renal injury in patients with severe sepsis: prognostic factors

    Directory of Open Access Journals (Sweden)

    Okamoto, Thábata Yaedu

    2012-01-01

    Conclusões: A insuficiência renal aguda foi ocorrência comum nos pacientes com sepse, fazendo parte de um quadro de disfunção de múltiplos órgãos e sistemas, particularmente nos pacientes com diagnóstico de choque séptico, estando associada a aumento da probabilidade de morte nesses pacientes graves. O uso de drogas vasoativas foi o único fator de risco para mortalidade em pacientes com sepse e insuficiência renal aguda que se manteve na análise multivariada. Estes resultados apontam para a importância do tratamento precoce dos quadros de sepse grave a tempo de prevenir a evolução para choque séptico e para insuficiência renal

  17. Clinical Practice Guidelines for Acute Pericarditis Treatment Guía de práctica clínica para el tratamiento de la pericarditis aguda

    Directory of Open Access Journals (Sweden)

    Francisco Riverón Mena

    2009-03-01

    Full Text Available Clinical Practice Guidelines for Acute Pericarditis Treatment. It has been defined as a syndrome caused by the inflammation of the pericardium for diverse aetiologies. The etiological agents, clinical presentation, diagnostic methods and steps that must be taken are described in this document. It includes assessment guidelines focused on the most important aspects to be accomplished.Guía de práctica clínica para el tratamiento de la pericarditis aguda. Definida como un síndrome originado por la inflamación del pericardio por diversas etiologías. Se describen sus agentes etiológicos, presentación clínica, métodos diagnósticos y la conducta ante una pericarditis aguda. Concluye con su guía de evaluación, enfocada en los aspectos más importantes a cumplir.

  18. Radical Reactions and Its Synthetic Application

    Institute of Scientific and Technical Information of China (English)

    Takeaki Naito

    2005-01-01

    @@ 1Introduction Strategies involving radical reactions have become preeminent tools in organic synthesis. Free radical-mediated cyclization has developed as a powerful method for preparing various types of cyclic compounds via carbon-carbon bond-forming processes. In order to develop effective and convenient methods for the synthesis of biologically active cyclic amines, we have focused our efforts on radical reactions using aldehydes, ketones,and C-C multiple bonds as a radical precursor and/or an oxime ether, hydrazone, and nitrone as a radical acceptor. In this lecture, I would like to talk on radical addition-cyclization of oxime ether and its application to the synthesis of martinellines.

  19. Implicación de rs924607 del gen CEP72 en la neurotoxicidad asociada a la vincristina en pacientes con leucemia linfoblastica aguda (LLA)

    OpenAIRE

    De Vicente Martínez, Beatriz

    2016-01-01

    Este trabajo se trata de un estudio estadístico de asociación entre el genotipo del SNP rs924607 presente en la región promotora del gen CEP72, y la neurotoxicidad asociada a la vincristina, en pacientes pediátricos de Leucemia Linfoblástica Aguda. El objetivo es determinar si el alelo presente en dicho SNP puede ser empleado como biomarcador para predecir la neurotoxicidad asociada a la vincristina.

  20. Radicalization In Pakistan And The Spread Of Radical Islam In Pakistan

    Directory of Open Access Journals (Sweden)

    Bahir ahmad

    2015-08-01

    Full Text Available ABSTRACT It is pertinent to mention that radicalism is not intrinsic to Islam and radical interpretations of the religion or for that matter may occur within any way of life and religion Saikal 2003 and yet the question remains as to why Muslims in certain geographical regions have more radical approaches towards their religion and also that what are the causes of such radicalization. Becoming a radical Muslim is not even a matter of a day nor is it a sudden process. There are several reasons behind making a person radical peaceful angry smiling or tolerant. For knowing the reason behind radicalization or radicals persons one has to understand the causes. Tracing these causes is one of the ways to eliminate such behavior. The first step in the elimination of the radical sentiments in a person is to develop peace in his personality Fair Malhotra amp Shapiro 2010. The chapter which has been addressed here is going to shed light on the roots and symptoms of the radicalism. There will be a brief discussion on how the roots of radicalism can be traced and can be eliminated. The assessment and discussion will be conducted on the parameters of the economy media politics and theology from social cultural point of view. According to the analysis of Ahrari 2000 political factor is one of the major and direct factors which have resulted in causing of the radicalism. These factors however intertwine with one another. Radical actions cannot take place only because of the political factors.

  1. Pancreatitis aguda: Análisis de 97 pacientes Acute pancreatitis: Analysis of 97 patients

    Directory of Open Access Journals (Sweden)

    Débora Pellegrini

    2009-04-01

    Full Text Available La pancreatitis aguda (PA es una patología con múltiples etiologías y de curso clínico diverso. En nuestro medio son escasas las comunicaciones acerca de esta entidad y en general abordan temas puntuales dentro del amplio espectro del cuadro. El objetivo de este trabajo es determinar las características clínicas, la etiología, el manejo y la evolución de los pacientes internados en nuestra institución con diagnóstico de PA. Se analizaron retrospectivamente los registros clínicos de los pacientes con diagnóstico de PA entre abril de 2004 y abril de 2007. Se evaluaron los datos poblacionales, etiología, tratamiento instaurado, gravedad y morbimortalidad. En el período analizado, 97 pacientes fueron internados con diagnóstico de PA. Cuarenta y nueve fueron de sexo masculino (50.5%. La edad promedio fue de 58.5 ± 1.6 años (rango 21-93. Noventa y dos pacientes presentaron un solo episodio de PA, y 5 pacientes dos o más episodios (pancreatitis recurrente. Según su etiología, 48 fueron de origen biliar, 23 idiopáticas, 11 post-procedimientos en la vía biliar, 2 de origen alcohólico y 13 de otras causas. La mediana de estadía hospitalaria fue 7 días. El 25% requirió internación en Unidad de Terapia Intensiva. Según la escala de Ranson la mayoría de los pacientes (n: 66; 72% presentaron cuadros leves. La mediana de inicio de alimentación oral fue de 3 días. Con respecto a las complicaciones, 13% presentaron falla multiorgánica, 8% necrosis pancreática (4 infectadas, sólo un paciente desarrolló un seudoquiste y otro un absceso pancreático. La mortalidad fue 7.2% (7 casos, todos con Ranson ≥ 3. La PA de origen biliar resultó ser la más común y si bien la presente es una serie pequeña, llama la atención el bajo número de PA de origen alcohólico. Aunque el número de complicaciones locales fue menor, la mortalidad fue similar a la descripta en la literatura. Nuestros datos también son coincidentes en cuanto al

  2. Involvement of free radicals in breast cancer

    OpenAIRE

    Ríos-Arrabal, Sandra; Artacho-Cordón, Francisco; León, Josefa; Román-Marinetto, Elisa; del Mar Salinas-Asensio, María; Calvente, Irene; Núñez, Maria Isabel

    2013-01-01

    Researchers have recently shown an increased interest in free radicals and their role in the tumor microenvironment. Free radicals are molecules with high instability and reactivity due to the presence of an odd number of electrons in the outermost orbit of their atoms. Free radicals include reactive oxygen and nitrogen species, which are key players in the initiation and progression of tumor cells and enhance their metastatic potential. In fact, they are now considered a hallmark of cancer. ...

  3. Quantitative determination of atmospheric hydroperoxyl radical

    Energy Technology Data Exchange (ETDEWEB)

    Springston, Stephen R. (Upton, NY); Lloyd, Judith (Westbury, NY); Zheng, Jun (Stony Brook, NY)

    2007-10-23

    A method for the quantitative determination of atmospheric hydroperoxyl radical comprising: (a) contacting a liquid phase atmospheric sample with a chemiluminescent compound which luminesces on contact with hydroperoxyl radical; (b) determining luminescence intensity from the liquid phase atmospheric sample; and (c) comparing said luminescence intensity from the liquid phase atmospheric sample to a standard luminescence intensity for hydroperoxyl radical. An apparatus for automating the method is also included.

  4. EPR spin trapping of protein radicals

    DEFF Research Database (Denmark)

    Davies, Michael Jonathan; Hawkins, Clare L

    2004-01-01

    Electron paramagnetic resonance (EPR) spin trapping was originally developed to aid the detection of low-molecular-mass radicals formed in chemical systems. It has subsequently found widespread use in biology and medicine for the direct detection of radical species formed during oxidative stress...... and via enzymatic reactions. Over the last 15 years this technique has also found increasing use in detecting and identifying radicals formed on biological macromolecules as a result of either radical reactions or enzymatic processes. Though the EPR signals that result from the trapping of large, slowly...

  5. Near-Ring Radicals and Class Pairs

    Institute of Scientific and Technical Information of China (English)

    L.Godloza; N.J.Groenewald; W.A.Olivier

    2005-01-01

    For near-ring ideal mappings p1 and p2, we investigate radical theoretical properties of and the relationship among the class pairs (p1: p2), (Sp2: Sp1) and (Rp2:Rp1). Conditions on p1 and p2 are given for a general class pair to form a radical class of various types. These types include the Plotkin and KA-radical varieties. A number of examples are shown to motivate the suitability of the theory of Hoehnke-radicals over KA-radicals when radical pairs of near-rings are studied. In particular, it is shown that (pc: P3) forms a KA-radical class, where Pc denotes the class of completely prime nearrings and P3 the class of 3-prime near-rings. This gives another near-ring generalization of the 2-primal ring concept. The theory of radical pairs are also used to show that in general the class of 3-semiprime near-rings is not the semisimple class of the 3-prime radical.

  6. The Games Radicals Play: Special Issue on Free Radicals and Radical Ions

    Directory of Open Access Journals (Sweden)

    John C. Walton

    2015-02-01

    Full Text Available Chemistry and Physics have aptly been described as “most excellent children of Intellect and Art” [1]. Both these “children” engage with many playthings, and molecules rank as one of their first favorites, especially radicals, which are amongst the most lively and exciting. Checking out radicals dancing to the music of entropy round their potential energy ballrooms is surely both entertaining and enlightening. Radicals’ old favorite convolutions are noteworthy, but the new styles, modes and arrangements appearing on the scene are even more interesting. Some of these are ephemeral and enjoy only a brief appearance, others are retro-types reappearing in new guises, still others are genuinely new and “go viral” in the scientific world. This Special Issue of Molecules contains the observations and reflections of a select group of chemists and physicists fascinated by this spectacle. It contains an eclectic mix reflecting on new modes and advances as well as on permutations and combinations that revive mature themes. [...

  7. Malondialdehyde in early phase of acute pancreatitis Malondialdehído en la fase inicial de la pancreatitis aguda

    Directory of Open Access Journals (Sweden)

    Vicent Hernández

    2011-11-01

    Full Text Available Aims: to assess oxidative stress in acute pancreatitis, its evolution over time and its relationship with the severity of the disease. Methods: during a two-year period, patients with acute pancreatitis with less than 24 hours of pain were evaluated. Serum was obtained the first, second and fourth day from admittance, if complications were detected, and after recovery. Malondialdehyde was determined by high performance liquid chromatography. Twenty healthy volunteers constituted the control group. Malondialdehyde between groups was compared with Mann-Whitney and Kruskal-Wallis tests; malondialdehyde evolution was studied with Wilcoxon test. Results: one hundred and sixty-nine patients were included (91 women, median age 67 years, range 20-95; 33 suffered a severe episode. Malondialdehyde decreased from first to fourth day (0.600 vs. 0.451 vs. 0.343 μM, respectively, p 0.05. In severe attacks malondialdehyde was higher than in control group at day 2 (severe: 0.514; mild: 0.440; control: 0.347 μM, p Objetivos: valorar el estrés oxidativo en la pancreatitis aguda, su evolución a lo largo del tiempo y su relación con la gravedad de la enfermedad. Métodos: durante un periodo de dos años, se estudiaron los pacientes ingresados por pancreatitis aguda con dolor abdominal de menos de 24 horas de evolución. Se obtuvo suero de los pacientes el primer, segundo y cuarto día de ingreso, en el momento en que se detectaban complicaciones y tras la recuperación. La concentración de malondialdehído fue determinada utilizando cromatografía líquida de alta resolución. Veinte voluntarios sanos conformaron el grupo control. La concentración de malondialdehído entre los diferentes grupos se comparó utilizando el test de Mann-Whitney y el test de Kruskal-Wallis; la evolución de malondialdehído se valoró mediante el test de Wilcoxon. Resultados: se incluyeron 169 pacientes (91 mujeres, edad mediana 67 años, rango 20-95; 33 sufrieron un episodio

  8. Etnografía de la infección respiratoria aguda en una zona rural del altiplano mexicano

    Directory of Open Access Journals (Sweden)

    MARTÍNEZ HOMERO

    1997-01-01

    Full Text Available Objetivo. Identificar los términos utilizados por las madres para referirse a enfermedades, signos y síntomas relacionados con infecciones respiratorias agudas, así como los signos de alarma que las motivan a buscar atención médica; asimismo, describir prácticas comunes de manejo de la enfermedad en el hogar. Material y métodos. Se trata de un estudio etnográfico en seis comunidades rurales del altiplano mexicano. Se entrevistó a 12 informantes clave, a seis madres de niños fallecidos por infección respiratoria aguda, y a 24 madres de niños menores de cinco años, con diversas técnicas etnográficas para complementar la información obtenida ("triangulación". Resultados. Las enfermedades comúnmente identificadas incluyeron gripa, anginas, tos, bronquitis, pulmonía, neumonía y "broncomonía". Los síntomas clave para el diagnóstico fueron escurrimiento de moco nasal, dolor de garganta, tos, dolor de cabeza o de cuerpo, calentura, "hervor" de pecho, y referencias a que el niño "está molesto o llorón", se pone morado o le hace falta el aire. La taquipnea fue referida como "respira fuerte", "respira mucho", "respira rápido" y "tiene sesido"; el tiraje, "se le hunde el pecho"; el estridor, como "quejido o ronquido de pecho"; la sibilancia, como "ronquido de pecho", y para la cianosis; "se pone morado". Entre los tratamientos ofrecidos en el hogar destacan el uso de tés, aplicación de limón, jitomate, tomate o papa en la garganta, y aplicación de sebo o pomada en pecho y espalda. No fue común la autoprescripción de antibióticos pero sí la de antipiréticos. La mayoría de las madres reconoció enfermedades leves y, en menor proporción, graves. Ante un caso grave de insuficiencia respiratoria aguda, la opción más frecuentemente elegida fue acudir a la clínica del proyecto; en segundo lugar al médico particular en la cabecera municipal, y al hospital de la Secretaría de Salud en la Jurisdicción. La cercanía y el

  9. Inhibitory effects of chitosan on superoxide anion radicals and lipid free radicals

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    With the electron spin resonance (ESR) technique, the inhibitory effects of chitosan on superoxide anion radicals and linoleic acid lipid radicals were found. The inhibitory ratio E for these two kinds of radicals is in proportion to the concentration of chitosan. It was also observed that E for linoleic acid lipid radicals increased with the increase of the degree of deacetylation and decreased with the increase of the molecular weight of chitosan.

  10. Is Radical Innovation Management Misunderstood?

    DEFF Research Database (Denmark)

    Kristiansen, Jimmi Normann; Gertsen, Frank

    2015-01-01

    This paper poses a critical view on radical innovation (RI) management research and practice. The study investigates how expected RI performance influences firms’ under- standing of their RI capability. RI performance is often based on output measures such as market shares or fiscal return....... On the contrary, RI capability building advocates for ex- ploration, learning, and accepting uncertainty. Hence, RI capability building often focuses on the processes of the firms, and not the outcome. Thus, it is argued that the RI capability- building and RI performance expectations are based on different...... managerial orientations. Coupling a discussion of the literature with case findings from four large international firms, this paper identifies a discrepancy between RI capability-building and RI perfor- mance within literature and practice. This is regarded to be a major contributing factor to RI program...

  11. Photoionisation of the tropyl radical

    Directory of Open Access Journals (Sweden)

    Kathrin H. Fischer

    2013-04-01

    Full Text Available We present a study on the photoionisation of the cycloheptatrienyl (tropyl radical, C7H7, using tunable vacuum ultraviolet synchrotron radiation. Tropyl is generated by flash pyrolysis from bitropyl. Ions and electrons are detected in coincidence, permitting us to record mass-selected photoelectron spectra. The threshold photoelectron spectrum of tropyl, corresponding to the X+ 1A1’ ← X 2E2” transition, reveals an ionisation energy of 6.23 ± 0.02 eV, in good agreement with Rydberg extrapolations, but slightly lower than the value derived from earlier photoelectron spectra. Several vibrations can be resolved and are reassigned to the C–C stretch mode ν16+ and to a combination of ν16+ with the ring breathing mode ν2+. Above 10.55 eV dissociative photoionisation of tropyl is observed, leading to the formation of C5H5+ and C2H2.

  12. Students' Ideas and Radical Constructivism

    Science.gov (United States)

    Sánchez Gómez, Pedro J.

    2016-08-01

    In this article, I study, from the point of view of the analytic philosophy of mind, the compatibility of students' ideas studies (SIS) with radical constructivism (RC). I demonstrate that RC is based on a psychology of narrow mental states; that is, the idea that the mental content of an individual can be fully characterised without any reference external to her or him. I show that this fact imposes some severe restrictions to SIS to be incorporated into RC. In particular, I argue that only qualitative studies can comply with the requirement of narrowness. Nevertheless, I propose that quantitative works can be employed as sources of types in order to study token actual students. I use this type-token dichotomy to put forward an outline of a theory of the relation between school contents and mental contents. In this view, token mental contents regarding a given topic can be defined, and probed, only by resorting to typical school contents.

  13. Iron and iron derived radicals

    Energy Technology Data Exchange (ETDEWEB)

    Borg, D.C.; Schaich, K.M.

    1987-04-01

    We have discussed some reactions of iron and iron-derived oxygen radicals that may be important in the production or treatment of tissue injury. Our conclusions challenge, to some extent, the usual lines of thought in this field of research. Insofar as they are born out by subsequent developments, the lessons they teach are two: Think fastexclamation Think smallexclamation In other words, think of the many fast reactions that can rapidly alter the production and fate of highly reactive intermediates, and when considering the impact of competitive reactions on such species, think how they affect the microenvironment (on the molecular scale) ''seen'' by each reactive molecule. 21 refs., 3 figs., 1 tab.

  14. Supporting radical front end innovation

    DEFF Research Database (Denmark)

    Aagaard, Annabeth; Gertsen, Frank

    2011-01-01

    ). Pharmaceutical innovation is unique, as it opposed to most other industries’ product development is science-driven and not customer-driven. In addition, the pharmaceutical FEI, as represented by research, lasts up to 5 years and the entire R&D process constitutes a period of 10-12 years, which is highly...... regulated by external authorities, e.g. The American Food and Drug Administration (FDA). The research aim of this paper is: to contribute to the field of FEI by studying how FEI can be actively supported within the industry specific context of the pharmaceutical industry, and through a conceptual discussion...... of FEI, pharmaceutical FEI and radical innovation. Based on this understanding, empirical research through exploratory and inductive case studies is analyzed. The value added and the contribution of this article to the existing FEI literature is in the study of the theoretical fields of research...

  15. Study of acute hepatotoxicity of Equisetum arvense L. in rats Estudo da hepatotoxicidade aguda da Equisetum arvense L. em ratos

    Directory of Open Access Journals (Sweden)

    Nilo César do Vale Baracho

    2009-12-01

    Full Text Available PURPOSE: To evaluate the acute hepatotoxicity of Equisentum arvense L. in rats. METHODS: Fifty Wistar rats were used, these being divided in four groups, one being the control (receiving only water and the other groups receiving graded doses of Equisentum arvense L. (30, 50, and 100mg/kg respectively for 14 days. Blood samples were obtained to determine TGO, TGP, FA, DHL and GT-gamma activities. After that, hepatic tissue samples were collected for the anatomopathologic analysis. RESULTS: The anatomopathologic exam of the hepatic tissue showed organ with preserved lobular structure. In the same way, there was no significant change in the seric activities of the hepatic enzymes when compared to control group. CONCLUSION: The oral treatment with graded doses of Equisentum arvense L. was not able to produce hepatic changes. Further studies are necessary to evaluate the chronic hepatotoxicity of Equisentum arvense L. in rats.OBJETIVO: Investigar a hepatotoxicidade aguda da Equisetum arvense L. em ratos. MÉTODOS: foram utilizados 50 ratos Wistar, os quais foram divididos em quatro grupos, sendo um controle (recebendo apenas água e os outros grupos recebendo doses crescentes de cavalinha (30, 50 e 100mg/Kg, respectivamente por 14 dias. Foram coletadas amostras de sangue para determinação da atividade sérica de TGO, TGP, FA, DHL e gama-GT. Em seguida, foram obtidas amostras de tecido hepático para análise anatomopatológica. RESULTADOS: O exame anatomopatológico de tecido hepático demonstrou órgão com estrutura lobular preservada. Da mesma forma, não houve alteração significativa na atividade sérica das enzimas hepáticas, quando comparado ao grupo controle. CONCLUSÃO: O tratamento com doses crescentes de Equisetum arvense L., não induziu hepatotoxicidade aguda em ratos. Novos estudos são necessários para avaliar a hepatoxicidade crônica de Equisetum arvense L. em ratos.

  16. Há evidências favorecendo o uso de betabloqueadores e dobutamina na insuficiência cardíaca aguda?

    Directory of Open Access Journals (Sweden)

    Luiz Carlos Santana Passos

    2013-02-01

    Full Text Available Diversos estudos relataram os benefícios dos betabloqueadores (BB para pacientes com insuficiência cardíaca sistólica. No entanto, muitos pacientes hospitalizados em decorrência de insuficiência cardíaca aguda já estão usando os BB e requerem dobutaminas para hipotensão arterial e baixo débito cardíaco. Portanto, deve-se tomar uma decisão a respeito de se o BB deve ser mantido ou até mesmo iniciado nesses casos. O objetivo deste estudo foi determinar se há provas que sustentem a segurança e a eficácia dos BB junto com a dobutamina para pacientes com insuficiência cardíaca aguda descompensada (ICAD. Foi realizada uma pesquisa na literatura de língua inglesa nas bases de dados MEDLINE, ISI Web of Science, Biblioteca Virtual em Saúde, Cochrane Library e o Portal de Revistas Científicas do Capes para identificar estudos relacionados. Literatura adicional foi obtida mediante a análise das respectivas referências encontradas nos artigos identificados. Os resultados esperados incluíram informações sobre o prognóstico (intra-hospitalar e na mortalidade no acompanhamento, número de dias de internação e reinternação, eficácia e segurança (agravamento dos sintomas, choque, intolerância do uso concomitante desses medicamentos em pacientes hospitalizados com ICAD e baixo débito cardíaco. Esta análise incluiu nove estudos. No entanto, não foram encontrados ensaios clínicos randomizados sobre o assunto. A maioria dos estudos inclui baixo número de pacientes, e não foram encontrados estudos que abordem a segurança do uso concomitante desses medicamentos. Os dados resultantes sugerem que uma cuidadosa revisão da literatura não forneceu evidências para o uso sistemático de BB em pacientes com síndrome de baixo débito cardíaco que necessitam de suporte inotrópico com dobutamina.

  17. Fatores de risco para lesão renal aguda em pacientes com trauma grave e seus efeitos na mortalidade

    Directory of Open Access Journals (Sweden)

    André Luciano Baitello

    2013-06-01

    Full Text Available Os estudos que relacionaram lesão renal aguda (LRA e trauma surgiram durante a Segunda Guerra Mundial e, desde então, tem havido progressiva evolução dos cuidados para a prevenção da LRA. Entretanto, a determinação dos fatores de risco para o desenvolvimento de LRA pós-trauma permanece crucial e pode ajudar a reduzir esta complicação. OBJETIVO: Este estudo tem como objetivo identificar os fatores de risco para o desenvolvimento de LRA em pacientes com trauma grave e sua influência na mortalidade. Trata-se de um estudo retrospectivo com 75 pacientes incluídos por apresentarem trauma grave; seis foram excluídos por terem chegado ao hospital sem condições de ressuscitação. MÉTODO: As variáveis estudadas foram: idade, sexo, gravidade do trauma de acordo com Injury Severity Score (ISS e Escala de Coma de Glasgow (ECG, mecanismo de trauma, pressão arterial média na admissão, reposição volêmica nas primeiras 24h, níveis séricos de creatinina, uso de antibióticos nefrotóxicos, tempo de internação, necessidade de internação em UTI e mortalidade. RESULTADOS: A prevalência de LRA em traumatizados graves foi de 17,3%, sendo que os fatores associados à IRA nessa amostra foram TCE, ECG < 10. A mortalidade, o tempo de internação e a necessidade de UTI foram significativamente maiores nos pacientes que desenvolveram LRA. CONCLUSÕES: A identificação desses fatores de risco é de suma importância para a formulação de estratégias de atendimento aos pacientes vítimas de trauma grave, visando à prevenção da lesão renal aguda e da elevada mortalidade.

  18. Efecto del calcio sobre la toxicidad aguda de aluminio en alevines de trucha arcoiris (Oncorhynchus mykiss expuestos en aguas de diferente pH

    Directory of Open Access Journals (Sweden)

    Rolando Vega

    2015-05-01

    Full Text Available En la producción de alevines de salmón de la región de la Araucanía (sur de Chile se presentan importantes eventos de mortalidad aguda sin rasgos patológicos aparentes. El problema se focaliza en ejemplares de 0,2 a 1 g y las causas apuntan a procesos de acidificación del pH del agua y a la presencia de ciertos metales pesados, entre los cuales destaca el aluminio, que alcanza concentraciones más allá de los rangos de tolerancia de los peces. La información científica indica que concentraciones de 5 mg Ca L-1 en el afluente son suficientes para mantener a salvo los peces del efectos tóxico del aluminio. Sin embargo, los problemas en la producción de alevines de salmón indican que se requiere un mayor conocimiento científico y evidencia experimental que soporte el desarrollo de procesos y tecnologías para el tratamiento de los afluentes de las pisciculturas chilenas. En este trabajo se evaluó el efecto de cuatro concentraciones de calcio (0, 5, 10 y 20 mg Ca L-1 sobre la toxicidad aguda de 500 μg Al L-1 en alevines de trucha arcoiris (Oncorhynchus mykiss de 0,1 g en agua de cultivo a pH 5, 6 y 7. El objetivo del trabajo fue determinar la dosis de calcio que reduce la toxicidad aguda de aluminio y los tiempos mínimos de reacción que podrían disponer los piscicultores para tomar medidas preventivas ante una concentración aguda de aluminio en el agua de cultivo. Los resultados indican que antes de 8 h de exposición a una concentración tóxica de aluminio los piscicultores deberían asegurar en el agua de cultivo una dosis superior a 10 mg Ca L-1 y un pH >6 como medida remedial para reducir el efecto de intoxicación aguda causada por aluminio.

  19. Efeitos hemodinâmicos da sobrecarga ventricular direita aguda experimental Efectos hemodinámicos de la sobrecarga ventricular derecha aguda experimental Hemodynamic effects of experimental acute right ventricular overload

    Directory of Open Access Journals (Sweden)

    Flávio Brito Filho

    2011-04-01

    Full Text Available FUNDAMENTO: A sobrecarga ventricular direita aguda está associada a situações clínicas de elevada morbimortalidade, tais como: ressecções pulmonares extensas, tromboembolismo pulmonar, transplante pulmonar e edema pulmonar das altitudes. Alguns pontos de sua fisiopatologia permanecem obscuros. OBJETIVO: Avaliar os efeitos hemodinâmicos da sobrecarga ventricular direita aguda experimental em suínos. MÉTODOS: A sobrecarga ventricular direita foi induzida pela oclusão das artérias pulmonares através de ligaduras. Vinte porcos foram utilizados no estudo, sendo alocados em 04 grupos: um controle, não submetido à oclusão vascular pulmonar, e três de sobrecarga ventricular direita submetidos à oclusão das seguintes artérias pulmonares: SVD1 (artéria pulmonar esquerda; SVD2 (artéria pulmonar esquerda e do lobo inferior direito e SVD3 (artéria pulmonar esquerda, do lobo inferior direito e do lobo mediastinal, obstruindo a vasculatura pulmonar em 42, 76 e 82,0% respectivamente. Variáveis de hemodinâmica foram medidas a cada 15 minutos durante a uma hora do estudo. Na análise estatística, foram utilizados ajustes de modelos lineares mistos com estrutura de variâncias e covariâncias. RESULTADOS: Nas comparações intergrupais, houve aumento significativo da frequência cardíaca (p = 0,004, pressão arterial pulmonar média (p = 0,001 e pressão capilar pulmonar (p FUNDAMENTO: La sobrecarga ventricular derecha aguda está asociada a situaciones clínicas de elevada morbimortalidad, tales como: resecciones pulmonares extensas, tromboembolismo pulmonar, transplante pulmonar y edema pulmonar de las alturas. Algunos puntos de su fisiopatología permanecen obscuros. OBJETIVO:Evaluar los efectos hemodinámicos de la sobrecarga ventricular derecha aguda experimental en porcinos. MÉTODOS:La sobrecarga ventricular derecha fue inducida por la oclusión de las arterias pulmonares a través de ligaduras. Veinte cerdos fueron utilizados en

  20. Victimology: A Consideration of the Radical Critique.

    Science.gov (United States)

    Friedrichs, David O.

    1983-01-01

    Discusses the emergence of a new radical model in criminology and a new subdisciplinary area of concern, victimology, with roots in Marx and Engels' original formulations. Argues that the radical understanding of victimization provides an important corrective to mainstream approaches and broadens the focus of the concept of victimization. (JAC)

  1. Localization versus delocalization in diamine radical cations

    DEFF Research Database (Denmark)

    Brouwer, A.M.; Wiering, P.G.; Zwier, J.M.;

    1997-01-01

    The optical absorption spectrum of the radical cation of 1,4-diphenylpiperazine 2a shows a strong transition in the near-IR, and only a weak band at 445 nm, in the region where aniline radical cations normally absorb strongly. This indicates that the charge and spin are delocalized over the two...

  2. What Is Radical in School Geography Today?

    Science.gov (United States)

    Morgan, John

    2011-01-01

    This article addresses the question of what "radical school geography" might look like in the present historical moment. It traces the history of a distinctive "radical" tradition in school geography, most prominently associated with the work of John Huckle, who argued for the importance of understanding the content and pedagogy of school…

  3. Radical Behaviorism and Buddhism: Complementarities and Conflicts

    Science.gov (United States)

    Diller, James W.; Lattal, Kennon A.

    2008-01-01

    Comparisons have been made between Buddhism and the philosophy of science in general, but there have been only a few attempts to draw comparisons directly with the philosophy of radical behaviorism. The present review therefore considers heretofore unconsidered points of comparison between Buddhism and radical behaviorism in terms of their…

  4. Resonance raman studies of phenylcyclopropane radical cations

    NARCIS (Netherlands)

    Godbout, J.T.; Zuilhof, H.; Heim, G.; Gould, I.R.; Goodman, J.L.; Dinnocenzo, J.P.; Myers Kelley, A.

    2000-01-01

    Resonance Raman spectra of the radical cations of phenylcyclopropane and trans-1-phenyl-2-methylcyclopropane are reported. A near-UV pump pulse excites a photosensitizer which oxidizes the species of interest, and a visible probe pulse delayed by 35 ns obtains the spectrum of the radical ion. The tr

  5. Free Radical Mechanisms in Autoxidation Processes.

    Science.gov (United States)

    Simic, Michael G.

    1981-01-01

    Discusses the use of steady-state radiation chemistry and pulse radiolysis for the generation of initial free radicals and formation of peroxy radicals in the autoxidation process. Provides information regarding the autoxidation process. Defines autoxidation reactions and antioxidant action. (CS)

  6. Sumário de atualização da II Diretriz Brasileira de Insuficiência Cardíaca Aguda 2009/2011

    Directory of Open Access Journals (Sweden)

    Marcelo Westerlund Montera

    2012-05-01

    Full Text Available Nos últimos dois anos, observamos diversas modificações na abordagem diagnóstica e terapêutica dos pacientes com Insuficiência Cardíaca aguda (IC aguda, o que nos motivou quanto à necessidade da realização de um sumário de atualização da II Diretriz Brasileira de Insuficiência Cardíaca Aguda de 2009. Na avaliação diagnóstica, o fluxograma diagnóstico foi simplificado e foi fortalecido o papel da avaliação clínica e ecocardiograma. Na avaliação clínico-hemodinâmica admissional, o ecocardiograma hemodinâmico ganhou destaque no auxilio da definição dessa condição no paciente com IC aguda na sala de emergência. Na avaliação prognóstica, os biomarcadores tiveram seu papel mais bem estabelecido, e a síndrome cardiorrenal teve seus critérios e valor prognóstico mais bem definidos. Os fluxogramas de abordagem terapêutica foram revistos, tornando-se mais simples e objetivos. Dentre os avanços na terapêutica medicamentosa destacam-se a segurança e a importância da manutenção ou introdução dos betabloqueadores na terapêutica admissional. A anticoagulação, de acordo com as novas evidências, ganha um espectro maior de indicações. O edema agudo de pulmão tem bem estabelecido os seus modelos hemodinâmicos de apresentação com suas distintas formas de abordagens terapêuticas, com novos níveis de indicação e evidência. No tratamento cirúrgico da IC aguda, a revascularização miocárdica, a abordagem das lesões mecânicas e o transplante cardíaco foram revistos e atualizados. Este sumário de atualização fortalece a II Diretriz Brasileira de Insuficiência Cardíaca Aguda por mantê-la atualizada e rejuvenescida. Todos os clínicos cardiologistas que lidam com pacientes com IC aguda encontrarão na diretriz e em seu sumário de atualização importantes instrumentos no auxílio da prática clínica para o melhor diagnóstico e tratamento de seus pacientes.

  7. Place of Schauta's radical vaginal hysterectomy.

    Science.gov (United States)

    Roy, Michel; Plante, Marie

    2011-04-01

    Women affected by early stage invasive cancer of the cervix are usually treated by surgery. Radical abdominal hysterectomy with pelvic lymphadenectomy is the most widely used technique. Because the morbidity of the abdominal approach can be important, the radical vaginal hysterectomy has gained acceptance in gynaecologic oncology. New instrumentation in laparoscopy also opens the possibility of treating cervical cancer by laparoscopically assisted vaginal radical hysterectomy and also total laparoscopic radical hysterectomy. Before these techniques become widely accepted, it has to be shown that safety and efficacy are comparable with the 'standard' abdominal approach. In this chapter, we review the technique of radical vaginal hysterectomy with pelvic lymphadenectomy and evaluate results of published studies, comparing the abdominal, vaginal and laparoscopic approaches.

  8. Pilot study of radical hysterectomy versus radical trachelectomy on sexual distress.

    Science.gov (United States)

    Brotto, Lori A; Smith, Kelly B; Breckon, Erin; Plante, Marie

    2013-01-01

    Radical trachelectomy, which leaves the uterus intact, has emerged as a desirable surgical option for eligible women with early-stage cervical cancer who wish to preserve fertility. The available data suggest excellent obstetrical outcomes with radical trachelectomy, and no differences in sexual responding between radical trachelectomy and radical hysterectomy. There is a need to examine the effect of radical hysterectomy on sexual distress given that it is distinct from sexual function. Participants were 34 women diagnosed with early-stage cervical cancer. The authors report 1-month postsurgery data for 29 women (radical hysterectomy group: n = 17, M age = 41.8 years; radical trachelectomy group: n = 12, M age = 31.8 years), and 6-month follow-up data on 26 women. Whereas both groups experienced an increase in sex-related distress immediately after surgery, distress continued to increase 6 months after surgery for the radical hysterectomy group but decreased in the radical trachelectomy group. There were no between-group differences in mood, anxiety, or general measures of health. The decrease in sex-related distress in the radical trachelectomy but not in the radical hysterectomy group suggests that the preservation of fertility may have attenuated sex-related distress. Care providers should counsel women exploring surgical options for cervical cancer about potential sex distress-related sequelae.

  9. Hepatite aguda colestática pelo propiltiouracil: relato de caso Acute cholestatic hepatitis induced by propylthiouracil: case report

    Directory of Open Access Journals (Sweden)

    Mônica Beatriz PAROLIN

    2000-04-01

    Full Text Available Propiltiouracil é uma droga amplamente utilizada no tratamento do hipertiroidismo. A hepatotoxicidade é um dos efeitos colaterais mais raros e também mais graves associados a ela. Relata-se um caso de hepatite aguda colestática que acomete um jovem de 15 anos em uso de propiltiouracil para tratamento de hipertiroidismo. Causas virais, metabólicas e autoimunes foram excluídas e a biopsia hepática revelou achados histopatológicos sugestivos de hepatite colestática induzida por droga. Com a suspensão da droga, houve remissão dos sintomas e normalização progressiva das provas de função hepática. Raramente, os pacientes em uso de propiltiouracil podem desenvolver injúria hepática grave.Propylthiouracil is widely used to treat patients with hyperthyroidism. However, propylthiouracil-induced hepatitis is an uncommon entity. The case of a 15-year-old boy treated with propylthiouracil for hyperthyroidism who developed a cholestatic acute hepatitis is reported. Viral, metabolic and autoimmune liver diseases were excluded and liver biopsy showed a pattern suggestive of drug-induced cholestatic hepatitis. After discontinuating the drug, there was a progressive resolution of symptoms and normalization of liver biochemical tests. Despite its rarity, patients receiving propylthiouracil are exposed to develop severe hepatotoxicity.

  10. Mecanismos del daño celular en la insuficiencia renal aguda Mechanisms of cell damage in acute renal failure

    Directory of Open Access Journals (Sweden)

    José Martínez

    1989-01-01

    Full Text Available

    Los mecanismos del da no celular en la insuficiencia renal aguda Incluyen alteraciones en la producción de energía, la permeabilidad celular y el transporte de calcio. Dichas alteraciones producen cambios progresivos en la estructura celular que pueden ser reversibles si desaparece la causa que llevó a la falla renal, excepto cuando se alcanza la fase final de la lesión de la membrana y se llega a necrosis celular. Este mismo fenómeno probablemente ocurre tambIén en situaciones clínicas.

    The mechanisms of cellular damage In acute renal failure Include alterations In energy production, cell membrane permeability and calcium transport. These changes lead to progressive damage of the whole cellular structure which In general can be reversible If the precipitating cause disappears, except when the final stages of cell membrane lesion take place and cellular necrosis has occurred. This phenomenon probably applies for the clinical settling as well.

  11. Oclusão arterial aguda por derivados da ergotamina Acute arterial occlusion caused by ergotamine derivatives

    Directory of Open Access Journals (Sweden)

    Edison Barreto de Souza

    2009-09-01

    Full Text Available Os derivados da ergotamina compõem diversas drogas amplamente utilizadas no tratamento de ataques agudos de migrânea. A intoxicação por estas substâncias resulta geralmente de sua administração crônica, promovendo sintomas secundários ao espasmo arterial e à consequente isquemia distal. Neste artigo, é relatado o caso de uma paciente de 47 anos com diagnóstico de oclusão arterial aguda em membros inferiores secundária ao uso de derivados da ergotamina. Após a suspensão da droga e a prescrição de anticoagulantes, vasodilatadores e antiagregante plaquetário, a paciente evoluiu com melhora da dor, da parestesia e com o retorno da coloração normal e dos pulsos distais em membros inferiores.Ergotamine derivatives include several drugs widely used in the treatment of acute migraine attacks. Intoxication by these substances generally results from chronic administration, promoting symptoms secondary to arterial spasm and the consequent distal ischemia. The authors report the case of a 47-year old patient with acute arterial occlusion in lower limbs secondary to the use of ergotamine derivatives. After drugs were suspended and anticoagulants, vasodilators and antiplatelet drugs were prescribed, the patient progressed with improvement of pain, paresthesia and return of normal skin color and distal pulses in lower limbs.

  12. Leucemia mieloide aguda versus ocupação profissional: perfil dos trabalhadores atendidos no Hospital de Hematologia de Recife

    Directory of Open Access Journals (Sweden)

    Queliane Gomes da Silva Carvalho

    2011-12-01

    Full Text Available O estudo objetivou conhecer o perfil dos trabalhadores em faixa etária economicamente ativa admitidos de 1997 a 2007 em hospital de hematologia com diagnóstico de leucemia mieloide aguda (LMA; verificar as profissões com maior prevalência entre os trabalhadores atendidos que foram a óbito e identificar os riscos ocupacionais compatíveis com o aparecimento da LMA nas profissões prevalentes. Estudo exploratório de natureza quantitativa. A maior parte dos perfis caracterizou-se por ser procedente do agreste e da região metropolitana do estado, do sexo masculino, pertencente à raça branca e com grau de escolaridade fundamental incompleto. As ocupações de maior destaque foram aquelas relacionadas à agricultura e ao trabalho doméstico, sendo as substâncias químicas utilizadas no processo de trabalho de ambas, de acordo com a literatura, possíveis fatores envolvidos no desencadeamento da patologia.

  13. Deleción terminal del brazo largo del cromosoma 9 en Leucemia promielocítica aguda

    Directory of Open Access Journals (Sweden)

    Herrera JC.

    2001-06-01

    Full Text Available La Leucemia Promielocítica Aguda (LPA, definida como M3 en la clasificación francesa-americana- británica (FAB(1, se caracteriza por presentar una translocación cromosómica al azar t(15;17(q22;q21. En esta translocación se fusionan los receptores del ácido retinoíco ?(? RAR gen localizado en el cromosoma 17 y el gen PML sobre el cromosoma 15(2. Por otra lado, la deleción del brazo largo del cromosoma 9(9q- es una alteración rara específica encontrada en (LMA como una anormalidad única del cariotipo o como un cambio secundario, particularmente junto con t(8;21(q22;q22(3,4. La mayoría de ellas son deleciones intersticiales, 9q12 y 9q22; constituyen el sitio más común de ruptura proximal y distal (5.

  14. Histoplasmose pulmonar aguda no Rio Grande do Sul Acute pulmonary histoplasmosis in the State of Rio Grande do Sul, Brazil

    Directory of Open Access Journals (Sweden)

    Gisela Unis

    2005-02-01

    Full Text Available INTRODUÇÃO: A histoplasmose pulmonar aguda depende da inalação de uma grande quantidade de propágulos fúngicos por um paciente hígido. O tempo de exposição determina a gravidade da doença. Uma epidemia é influenciada por fatores que afetam o crescimento e a transmissão do Histoplasma capsulatum var. capsulatum na natureza. OBJETIVO: Identificar os aspectos epidemiológicos e clínico-laboratoriais dos pacientes com histoplasmose pulmonar aguda no Rio Grande do Sul e compará-los com as microepidemias relatadas no Brasil. MÉTODO: Foram revisados 212 prontuários clínicos de pacientes com histoplasmose dos arquivos do Laboratório de Micologia do Complexo Hospitalar Santa Casa de Porto Alegre (RS num período de 25 anos (1977-2002. Foram identificados e incluídos no estudo os casos de histoplasmose pulmonar aguda com cultivo positivo e/ou achado histopatológico compatível. As microepidemias foram diagnosticadas com a comprovação de um caso ou evidência soromicológica com história clínica compatível. Foram revisadas as microepidemias publicadas no Brasil. RESULTADOS: Dezoito de um total de 212 pacientes (8,5% foram incluídos no trabalho. A idade variou de 8 a 63 anos (média de 35,4; mediana de 34,5, e 67% eram do sexo masculino. A história epidemiológica foi sugestiva em 11 pacientes (61%. O tipo primário de histoplasmose pulmonar aguda foi o mais freqüente (17; 95%. Houve predomínio de casos isolados. CONCLUSÃO: O reconhecimento de casos isolados e a presença de microepidemias demonstram a abundância do H. capsulatum no solo, e juntamente com a ocorrência de todas as formas da doença, confirmam o Rio Grande do Sul como hiperendêmico para histoplasmose.BACKGROUND: Acute pulmonary histoplasmosis is a respiratory infection occurring when an otherwise healthy individual inhales a large quantity of fungal propagules. Length of exposure determines disease severity. An epidemic is influenced by factors affecting the

  15. Alimentación sostenida durante diarrea aguda en niños menores de cinco años

    Directory of Open Access Journals (Sweden)

    MARTÍNEZ-SALGADO HOMERO

    1998-01-01

    Full Text Available Objetivo. Identificar alimentos locales con aceptabilidad cultural para nutrir a niños con diarrea aguda y probar su aceptación e impacto sobre el peso corporal en niños enfermos. Material y métodos. Se entrevistó a 142 madres de niños menores de cinco años en comunidades rurales, para conformar dietas culturalmente aceptables mediante sorteo de grupos, desplegado en un diagrama multidimensional. Se hizo un ensayo sobre el curso clíniño de 54 niños de 4-50 meses de edad cursando las primeras 48 horas de un episodio diarreico, quienes recibieron las dietas desarrolladas. Resultados. Se diseñaron dietas de acuerdo con la edad del niño y con el tiempo de evolución de la enfermedad. En las 47.6 ± 22.2 horas que permanecieron hospitalizados, los niños consumieron 44.8 ± 28.6 kcal/kg/día (además de la leche materna y ganaron 70.6 ± 179.7 g. Hubo una relación directa entre mayor edad y mayor consumo calórico, y entre éste y mayor ganancia de peso. Conclusiones. Los niños mostraron buena aceptabilidad a las dietas ofrecidas, de tal manera que se evitó la pérdida de peso.

  16. Sintomas de pacientes antes da primeira hospitalização por Síndrome Coronariana Aguda

    Directory of Open Access Journals (Sweden)

    Carina Aparecida Marosti Dessotte

    2011-10-01

    Full Text Available Este estudo objetivou caracterizar os pacientes quanto ao relato da presença de sintomas de dor torácica, dispneia e limitação das atividades diárias uma semana antes da primeira hospitalização por Síndrome Coronariana Aguda, segundo a forma de apresentação clínica, e compará-las. Estudo transversal, descritivo e correlacional. Utilizou-se um instrumento de avaliação clínica que investigou a presença e a gravidade dos sintomas de dispneia, precordialgia e restrição física decorrentes da isquemia do miocárdio. Com relação à limitação para realização de atividades físicas, pacientes com diagnóstico de angina instável mostraram maior comprometimento na semana que antecedeu a internação, assim como relataram a presença de dispneia e precordialgia com maior frequência do que os pacientes infartados em situações que vão desde realizarem grandes esforços como, por exemplo, caminhar na subida ou muito rápido no plano, até situações de repouso ou de pequenos esforços.

  17. Customers as Partners in Radical Service Innovation

    DEFF Research Database (Denmark)

    Scupola, Ada; Nicolajsen, Hanne Westh

    2009-01-01

      Purpose- The main purpose of this paper is to investigate customer involvement and related challenges in radical service innovations in engineering consulting services Design/methodology/approach - The paper uses a case study approach and so called rich descriptions to investigate customer...... involvement, roles and related challenges and conditions in radical service innovations.Findings- One main finding is that customers can engage in radical service innovations in engineering consultancy services and may play a decisive role. In doing this they most likely take on all the three user involvement...... in engineering consulting services on the base of an in depth case study of an engineering consultancy. Research paper...

  18. Radical pancreaticoduodenectomy for benign disease.

    LENUS (Irish Health Repository)

    Kavanagh, D O

    2008-01-01

    Whipple\\'s procedure is the treatment of choice for pancreatic and periampullary malignancies. Preoperative histological confirmation of malignancy is frequently unavailable and some patients will subsequently be found to have benign disease. Here, we review our experience with Whipple\\'s procedure for patients ultimately proven to have benign disease. The medical records of all patients who underwent Whipple\\'s procedure during a 15-year period (1987-2002) were reviewed; 112 patients underwent the procedure for suspected malignancy. In eight cases, the final histology was benign (7.1%). One additional patient was known to have benign disease at resection. The mean age was 50 years (range: 30-75). The major presenting features included jaundice (five), pain (two), gastric outlet obstruction (one), and recurrent gastrointestinal haemorrhage (one). Investigations included ultrasound (eight), computerised tomography (eight), endoscopic retrograde cholangiopancreatography (seven; of these, four patients had a stent inserted and three patients had sampling for cytology), and endoscopic ultrasound (two). The pathological diagnosis included benign biliary stricture (two), chronic pancreatitis (two), choledochal cyst (one), inflammatory pseudotumour (one), cystic duodenal wall dysplasia (one), duodenal angiodysplasia (one), and granular cell neoplasm (one). There was no operative mortality. Morbidity included intra-abdominal collection (one), anastomotic leak (one), liver abscess (one), and myocardial infarction (one). All patients remain alive and well at mean follow-up of 41 months. Despite recent advances in diagnostic imaging, 8% of the patients undergoing Whipple\\'s procedure had benign disease. A range of unusual pathological entities can mimic malignancy. Accurate preoperative histological diagnosis may have allowed a less radical operation to be performed. Endoscopic ultrasound-guided fine needle aspirate (EUS-FNA) may reduce the need for Whipple\\'s operation

  19. Radical Pancreaticoduodenectomy for Benign Disease

    Directory of Open Access Journals (Sweden)

    D. O. Kavanagh

    2008-01-01

    Full Text Available Whipple's procedure is the treatment of choice for pancreatic and periampullary malignancies. Preoperative histological confirmation of malignancy is frequently unavailable and some patients will subsequently be found to have benign disease. Here, we review our experience with Whipple's procedure for patients ultimately proven to have benign disease. The medical records of all patients who underwent Whipple's procedure during a 15-year period (1987–2002 were reviewed; 112 patients underwent the procedure for suspected malignancy. In eight cases, the final histology was benign (7.1%. One additional patient was known to have benign disease at resection. The mean age was 50 years (range: 30–75. The major presenting features included jaundice (five, pain (two, gastric outlet obstruction (one, and recurrent gastrointestinal haemorrhage (one. Investigations included ultrasound (eight, computerised tomography (eight, endoscopic retrograde cholangiopancreatography (seven; of these, four patients had a stent inserted and three patients had sampling for cytology, and endoscopic ultrasound (two. The pathological diagnosis included benign biliary stricture (two, chronic pancreatitis (two, choledochal cyst (one, inflammatory pseudotumour (one, cystic duodenal wall dysplasia (one, duodenal angiodysplasia (one, and granular cell neoplasm (one. There was no operative mortality. Morbidity included intra-abdominal collection (one, anastomotic leak (one, liver abscess (one, and myocardial infarction (one. All patients remain alive and well at mean follow-up of 41 months. Despite recent advances in diagnostic imaging, 8% of the patients undergoing Whipple'’s procedure had benign disease. A range of unusual pathological entities can mimic malignancy. Accurate preoperative histological diagnosis may have allowed a less radical operation to be performed. Endoscopic ultrasound–guided fine needle aspirate (EUS-FNA may reduce the need for Whipple's operation in

  20. Radicalization and the Use of Social Media

    Directory of Open Access Journals (Sweden)

    Robin Thompson

    2011-01-01

    Full Text Available The use of social media tools by individuals and organizations to radicalize individuals for political and social change has become increasingly popular as the Internet penetrates more of the world and mobile computing devices are more accessible. To establish a construct for radicalization,the power and reach of social media will be described so there is common understanding of what social media is and how it is utilized by various individuals and groups. The second section will answer the question of why social media applications are the perfect platform for the radical voice. Finally, the use of social media and its influence in radicalizing populations in Northern Africa and the Middle East during 2011 will be analyzed and recommendations proposed.

  1. Magnetic Trapping of Cold Methyl Radicals

    CERN Document Server

    Liu, Yang; Djuricanin, Pavle; Zhou, Sida; Zhong, Wei; Mittertreiner, Tony; Carty, David; Momose, Takamasa

    2016-01-01

    We have demonstrated that a supersonic beam of methyl radicals (CH3) in the ground rotational state of both para and ortho species has been slowed down to a standstill with a magnetic molecular decelerator, and successfully captured spatially in an anti-Helmholtz magnetic trap for > 1 s. The translational temperature of the trapped CH3 radicals was about 200 mK. The methyl radical is a non-polar polyatomic molecule, which is predicted to be an ideal system for further cooling below 1 mK via sympathetic cooling with ultracold atoms. In addition, it is a highly reactive intermediate that plays an important role in various processes in cold environments such as planetary atmospheres and the interstellar medium. The demonstrated trapping capability of methyl radicals opens up various possibilities for realizing ultracold ensembles of molecules towards Bose-Einstein condensation of polyatomic molecules and investigations of reactions governed by quantum statistics.

  2. Rigid Ideals and Radicals of Ore Extensions

    Institute of Scientific and Technical Information of China (English)

    Chan Yong Hong; Tai Keun Kwak; S. Tariq Rizvi

    2005-01-01

    For an endomorphism σ of a ring R, Krempa called σ a rigid endomorphism if aσ(a) = 0 implies a= 0 for a ∈ R. A ring R is called rigid if there exists a rigid endomorphism of R. In this paper, we extend the σ-rigid property of a ring R to an ideal of R. For a σ-ideal Ⅰ of a ring R, we call Ⅰ a σ-rigid ideal if aσ(a) ∈Ⅰ implies a ∈Ⅰ for a ∈ R. We characterize σ-rigid ideals and study related properties. The connections of the prime radical and the upper nil radical of R with the prime radical and the upper nil radical of the Ore extension R[x; σ, δ], respectively, are also investigated.

  3. Customers as Partners in Radical Service Innovation

    DEFF Research Database (Denmark)

    Scupola, Ada; Nicolajsen, Hanne Westh

    2009-01-01

    ongoing collaboration where creativity and trial and error are crucial. These needs require new ways of communicating and interacting between customer and consultants. Originality/value- This article is original because it generates new insights into conditions and challenges in radical innovations in......  Purpose- The main purpose of this paper is to investigate customer involvement and related challenges in radical service innovations in engineering consulting services Design/methodology/approach - The paper uses a case study approach and so called rich descriptions to investigate customer...... involvement, roles and related challenges and conditions in radical service innovations.Findings- One main finding is that customers can engage in radical service innovations in engineering consultancy services and may play a decisive role. In doing this they most likely take on all the three user involvement...

  4. Neo-liberal Governing of 'Radicals'

    DEFF Research Database (Denmark)

    Lindekilde, Lasse

    2012-01-01

    The Danish government’s counter-radicalization Action Plan of 2009 had intended and unintended effects. Primarily targeting Danish Muslims, it employs neoliberal governmentality approaches of governance through individual support and response, information and knowledge, empowerment, surveillance ...

  5. Innovation Type, Radicalness, and the Adoption Process.

    Science.gov (United States)

    Damanpour, Fariborz

    1988-01-01

    Reviews studies on the impact of organizational factors on the adoption of innovations along three dimensions (innovation type, innovation radicalness, and stages of adoption), finding considerable agreement. Proposes a research agenda for future studies. (SR)

  6. Optimal pain management for radical prostatectomy surgery

    DEFF Research Database (Denmark)

    Joshi, Grish P; Jaschinski, Thomas; Bonnet, Francis;

    2015-01-01

    BACKGROUND: Increase in the diagnosis of prostate cancer has increased the incidence of radical prostatectomy. However, the literature assessing pain therapy for this procedure has not been systematically evaluated. Thus, optimal pain therapy for patients undergoing radical prostatectomy remains ...... invasive surgical procedures. Finally, while we wait for appropriate procedure specific evidence from publication of adequate studies assessing optimal pain management after radical prostatectomy, we propose a basic analgesic guideline....... treatments studied improved pain relief and/or reduced opioid requirements. However, there were significant differences in the study designs and the variables evaluated, precluding quantitative analysis and consensus recommendations. CONCLUSIONS: This systematic review reveals that there is a lack...... of evidence to develop an optimal pain management protocol in patients undergoing radical prostatectomy. Most studies assessed unimodal analgesic approaches rather than a multimodal technique. There is a need for more procedure-specific studies comparing pain and analgesic requirements for open and minimally...

  7. Radical-Local Teaching and Learning

    DEFF Research Database (Denmark)

    Hedegaard, Mariane; Chaiklin, Seth

    , and Aidarova. The second half of the book addresses the central concern of radical-local teaching and learning - how to relate educational practices to children's specific historical and cultural conditions. The experiment was conducted for an academic year in an afterschool programme in the East Harlem......Radical-Local Teaching and Learning presents a theoretical perspective for analyzing and planning educational programmes for schoolchildren. To realize both general societal interests and worthwhile personal development, the content of educational programmes for children must be grounded...... radical-local teaching and learning approach. The first half of the book introduces the idea of radical-local teaching and learning and develops the theoretical background for this perspective, drawing on the cultural-historical research tradition, particularly from Vygotsky, El'konin, Davydov...

  8. Fast beam studies of free radical photodissociation

    Energy Technology Data Exchange (ETDEWEB)

    Neumark, D.M. [Lawrence Berkeley Laboratory, CA (United States)

    1993-12-01

    The authors have developed a novel technique for studying the photodissociation spectroscopy and dynamics of free radicals. In these experiments, radicals are generated by laser photodetachment of a fast (6-8 keV) mass-selected negative ion beam. The resulting radicals are photodissociated with a second laser, and the photofragments are collected and detected with high efficiency using a microchannel plate detector. The overall process is: ABC{sup -} {yields} ABC + e{sup -} {yields} A + BC, AB + C. Two types of fragment detection schemes are used. To map out the photodissociation cross-section of the radical, the photodissociation laser is scanned and the total photofragment yield is measured as a function of wavelength. In other experiments, the photodissociation frequency is fixed and the photofragment masses, kinetic energy release, and scattering angle is determined for each photodissociation event.

  9. Acute pancreatitis associated with hypercalcemia: A report of two cases Pancreatitis aguda asociada a hipercalcemia: Presentación de dos casos

    Directory of Open Access Journals (Sweden)

    J. Egea Valenzuela

    2009-01-01

    Full Text Available Hypercalcemia due to hyperparathyroidism is a rare etiology for acute pancreatitis, oscillating between 1.5 and 7% in the different series. Although the cause-effect relationship and the pathophysiology of the condition are not clear, it seems that the association among them is not incidental, and serum calcium could be a major risk factor, so that pancreatitis would come to occur during severe hypercalcemia attacks. Mutations in different genes have been proposed as well to justify why only some patients with primary hyperparathyroidism and hypercalcemia develop acute pancreatitis. References to cases like these ones are rare in the literature. We report two patients with acute pancreatitis associated with hyperparathyroidism and hypercalcemia, one of them with a fatal outcome.La hipercalcemia secundaria a hiperparatiroidismo es una causa rara de pancreatitis aguda, variando entre el 1,5-7% según las series consultadas. Aunque la relación causal y la fisiopatología del proceso no están totalmente aclaradas, parece claro que la asociación no es incidental y que los niveles de calcio sérico serían un factor de riesgo mayor, desencadenándose los cuadros de pancreatitis durante las crisis de hipercalcemia. También se han descrito alteraciones en diversos genes que podrían estar implicados, justificando por qué sólo unos pocos pacientes con hiperparatiroidismo primario e hipercalcemia sufren pancreatitis aguda. Existen muy pocas referencias en la literatura a casos como los que nos ocupan. Presentamos a continuación dos pacientes con cuadros de pancreatitis aguda asociados a hiperparatiroidismo e hipercalcemia, uno de ellos con desenlace fatal.

  10. Estudio de seguimiento a cinco años de la psicosis aguda: evolución diagnóstica y adaptación psicosocial

    Directory of Open Access Journals (Sweden)

    A Pedrós Roselló

    2012-01-01

    Full Text Available Introducción: existe un grupo de psicosis agudas que presenta un pronóstico más favorable. Sin embargo, algunas de estas psicosis pueden evolucionar hacia enfermedades crónicas psicóticas o afectivas. El objetivo de este trabajo es el estudio de la evolución diagnóstica y pronóstico en psicosis aguda. Método. Estudio observacional durante cinco años de una muestra poblacional de pacientes con psicosis aguda. Resultados: a los cinco años el 73,2% de los 41 pacientes analizados recibe un diagnóstico de enfermedad psicótica o afectiva crónica, presentando mayor deterioro en su adaptación y calidad de vida. Aproximadamente un 50% de los casos con psicosis breve al inicio del estudio continúa manteniendo dicho diagnóstico. Aunque no existan diferencias en la evolución diagnóstica en relación al género, las mujeres presentan un menor grado de deterioro con una mejor adaptación. Conclusiones. A los cinco años la mayoría de los pacientes han desarrollado una enfermedad psicótica o afectiva crónica. El único diagnóstico con mayor estabilidady mejor pronóstico es el de trastorno psicótico breve, sobre todo con acontecimientos vitales desencadenantes. Las mujeres presentan un menor deterioro y mejor adaptación y calidad de vida que los hombres.

  11. Evaluación del sistema de vigilancia epidemiológica para la enfermedad diarreica aguda en el área rectora de salud de Alajuela 2

    Directory of Open Access Journals (Sweden)

    Manrique Leal-Mateos

    2005-07-01

    Full Text Available Objetivo:El objetivo de este trabajo fue evaluar el sistema de vigilancia epidemiológica para la enfermedad diarreica aguda en el Área Rectora de Salud Alajuela 2 durante el mes de noviembre del año 2004,a .n de tener una apreciación detallada de su desempeño y utilidad. Métodos:Se utilizó la entrevista y observación como métodos directos de recolección de la información.Para esto,se aplicó al personal de salud del área rectora un cuestionario diseñado con base en los atributos cualitativos (simplicidad, flexibilidad,aceptabilidad y cuantitativos (sensibilidad,valor predictivo positivo,representatividad y oportunidad básicos que debe poseer un sistema de vigilancia epidemiológica. Es importante aclarar que durante las actividades realizadas se indagaron y comprobaron todos los aspectos necesarios para responder a las preguntas formuladas durante la evaluación. Resultados:Con base en los atributos evaluados se podría indicar que el sistema de vigilancia epidemiológica para la enfermedad diarreica aguda es relativamente sencillo y flexible.No obstante, existen problemas relacionados con los demás atributos que deben ser solucionados para obtener resultados más satisfactorios. Conclusiones:El presente trabajo demostró que el sistema de vigilancia epidemiológica para la enfermedad diarreica aguda necesita ciertos cambios en su planteamiento.Sin embargo,lejos de ser una debilidad,la identificación de ciertas deficiencias en el cumplimiento de algunos atributos como la sensibilidad,especificidad y oportunidad,debe servir como herramienta para perfeccionar el funcionamiento de éstos.

  12. Catalytic Radical Domino Reactions in Organic Synthesis

    Science.gov (United States)

    Sebren, Leanne J.; Devery, James J.; Stephenson, Corey R.J.

    2014-01-01

    Catalytic radical-based domino reactions represent important advances in synthetic organic chemistry. Their development benefits synthesis by providing atom- and step-economical methods to complex molecules. Intricate combinations of radical, cationic, anionic, oxidative/reductive, and transition metal mechanistic steps result in cyclizations, additions, fragmentations, ring-expansions, and rearrangements. This Perspective summarizes recent developments in the field of catalytic domino processes. PMID:24587964

  13. Project Radicalization: Why do "they" hate "us"?

    OpenAIRE

    Eggert, Lasse; Foged, Mathias; Jensen, Martin

    2014-01-01

    The phenomenon of global terrorism is still not fully understood by the international community whether within the contingents of public decision-makers, security agencies and researchers. Radicalization as explanation and analytical tool for understanding terrorism has relatively recently gained new prominence. In this project the question of which discourses can be found in the scientific material within the research field of terrorism and radicalization is addressed. A sample of scientifi...

  14. Radicalization and the Use of Social Media

    OpenAIRE

    Robin Thompson

    2011-01-01

    The use of social media tools by individuals and organizations to radicalize individuals for political and social change has become increasingly popular as the Internet penetrates more of the world and mobile computing devices are more accessible. To establish a construct for radicalization,the power and reach of social media will be described so there is common understanding of what social media is and how it is utilized by various individuals and groups. The second section will answer the q...

  15. Free Radicals, Antioxidants in Disease and Health

    OpenAIRE

    Pham-Huy, Lien Ai; He, Hua; Pham-Huy, Chuong

    2008-01-01

    Free radicals and oxidants play a dual role as both toxic and beneficial compounds, since they can be either harmful or helpful to the body. They are produced either from normal cell metabolisms in situ or from external sources (pollution, cigarette smoke, radiation, medication). When an overload of free radicals cannot gradually be destroyed, their accumulation in the body generates a phenomenon called oxidative stress. This process plays a major part in the development of chronic and degene...

  16. Composição química, atividade antibacteriana e avaliação da toxicidade aguda de vetiveria zizanoides L. Nash (Poaceae)

    OpenAIRE

    Barros, Gilvana C.; Tresvenzol, Leonice M.F.; Cunha, Luiz C.; Pedro H. Ferri; José R. Paula; Bara, María Teresa. F.

    2009-01-01

    O vetiver (Vetiveria zizanioides L. Nash) é uma planta aromática representante da família Poaceae e utilizada na terapia Ayurvédica. Nesse trabalho objetivou-se investigar a composição química do óleo essencial da raiz do vetiver cultivado no Hospital de Medicina Alternativa em Goiás-Brasil, avaliar seu potencial antimicrobiano e realizar ensaio de toxicidade aguda. A análise química do óleo essencial foi realizada por cromatografia gasosa acoplada a espectrometria de massas (CG/EM), e o khus...

  17. Nutrición artificial y pancreatitis aguda: revisión y actualización Artificial nutrition and acute pancreatitis: a review and update

    Directory of Open Access Journals (Sweden)

    E. Gento Peña

    2007-02-01

    Full Text Available La mayoría de los casos de pancreatitis aguda se presentan como formas leves, en las que no se recomienda el soporte nutricional, a no ser que los pacientes no puedan reanudar su alimentación oral normal después de 5-7 días. Por el contrario, la pancreatitis grave cursa con estrés metabólico, y precisa de soporte nutricional precoz. En estos casos, se recomienda nutrición enteral, que debe complementarse con nutrición parenteral si es preciso. Estudios recientes indican que la nutrición enteral puede mejorar la evolución de la pancreatitis aguda grave, reducir las complicaciones y favorecer una recuperación más rápida de la enfermedad. La mayoría de los pacientes toleran una nutrición enteral oligomérica administrada en infusión continua distalmente al ángulo de Treitz. Estudios recientes apuntan, sin embargo, que la perfusión intragástrica es segura y puede ser una buena opción terapéutica en determinados pacientes con pancreatitis aguda grave. Además, agentes específicos añadidos a la nutrición (inmunomoduladores y probióticos parecen reducir la estancia hospitalaria y las complicaciones infecciosas y no infecciosas de la pancreatitis aguda.Most of acute pancreatitis cases present as mild cases for which nutritional support is not recommended provided the patient is able to restart normal oral intake within 5- days. By contrast, severe pancreatitis associates metabolic stress and requires early nutritional support. In these cases, enteral nutrition is recommended, which should be supplemented with parenteral nutrition if needed. Recent studies indicate that enteral nutrition may improve the course of severe acute pancreatitis, reduce its complications and promote a quicker improvement from the disease. Most of the patients tolerate oligomeric nutrition administered as continuous infusion distally to the Treitz’s angle. Recent studies show, however, that intragastric perfusion is safe and may be an adequate

  18. Infecções agudas das vias aéreas superiores: diagnóstico e tratamento ambulatorial Acute upper respiratory tract infections: outpatient diagnosis and treatment

    Directory of Open Access Journals (Sweden)

    Paulo M.C. Pitrez

    2003-06-01

    Full Text Available OBJETIVO: apresentar uma revisão atualizada sobre as infecções das vias aéreas superiores (IVAS mais comuns na prática diária de consultório do pediatra, visando a uma adequada orientação de condutas diagnósticas e terapêuticas. FONTES DOS DADOS: foram revisadas referências obtidas na base de dados Medline. Foram selecionados os artigos mais relevantes sobre o tema. SÍNTESE DOS DADOS: rinofaringite aguda, sinusite aguda, faringoamigdalite aguda estreptocócica e laringite viral aguda são apresentadas de forma crítica e sucinta. As dificuldades observadas na prática clínica, em relação ao diagnóstico diferencial de determinadas IVAS, limitações na busca do agente etiológico e o uso, muitas vezes abusivo, de antimicrobianos são analisados e discutidos. CONCLUSÕES: as IVAS são um dos motivos mais comuns de visita ao consultório do pediatra. Por isso, conceitos e informações atualizados são essenciais para que o manejo dessa doença seja otimizado, reduzindo a indicação de exames diagnósticos dispensáveis, ou a implementação de tratamentos desnecessários ou prejudiciais ao paciente.OBJECTIVE: to present an updated review of the most common upper respiratory infections (URI in children seen by the pediatrician in outpatient clinics, for better diagnostic and therapeutic decisions. SOURCES OF DATA: references from Medline database were reviewed. The most relevant articles were selected. SUMMARY OF THE FINDINGS: acute rhinopharyngitis, sinusitis, streptococcal tonsillitis and viral croup are presented in a concise and critical view. Differential and etiological diagnosis limitations and the abusive use of antimicrobials in these illnesses are also discussed. CONCLUSIONS: URI are the most common cause of visits to pediatrician clinics. Therefore, update and critical concepts, as well as references are essential for a proper management of these illnesses, decreasing the indication of unnecessary diagnostic tests and

  19. Expresión diferencial de reactantes de fase aguda en distintos tipos celulares de pacientes con enfermedad pulmonar obstructiva crónica

    OpenAIRE

    Calero Acuña, Carmen

    2012-01-01

    La presente Tesis Doctoral se enmarca en el estudio de la enfermedad pulmonar obstructiva crónica (EPOC) como enfermedad pulmonar con repercusión sistémica y se basa en el estudio de la expresión celular diferencial de marcadores inflamatorios inespecíficos haciendo un especial hincapié en la importancia de los reactantes de fase aguda. Con objeto de centrar la exposición de la metodología y poder valorar adecuadamente los resultados, iniciaremos el presente trabajo realizando una revisión...

  20. Ventilación no invasiva mediante ventilador volumétrico convencional en la insuficiencia respiratoria aguda pediátrica.

    OpenAIRE

    Flor Macián, Eva Mª

    2009-01-01

    RESUMEN La Insuficiencia respiratoria aguda (IRA) constituye una de las principales causas de ingreso en las UCIPs. La ventilación no invasiva (VNI), es decir, sin intubación endotraqueal ni traqueostomía, supone una alternativa a considerar en el tratamiento de estos pacientes. Existen numerosos estudios publicados sobre su eficacia en pacientes adultos con IRA para evitar la intubación y reducir la mortalidad. Sin embargo, su papel en la IRA pediátrica todavía no está bien definido. ...

  1. Lactancia materna y diarrea aguda en los primeros tres meses de vida Breast feeding and the incidence of acute diarrhea during the first three months of life

    OpenAIRE

    Claudia Macías-Carrillo; Francisco Franco-Marina; Kurt Long-Dunlap; Sendy Isarel Hernández-Gaytán; Yolanda Martínez-López; Malaquías López-Cervantes

    2005-01-01

    OBJETIVO: Evaluar el efecto de la lactancia materna exclusiva y sus interacciones con algunos factores socioeconómicos, en relación con la incidencia de diarrea aguda durante los primeros tres meses de la vida. MATERIAL Y MÉTODOS: En la ciudad de Durango, México, en 1994 se llevó a cabo un estudio de cohorte con tres meses de seguimiento; la muestra estuvo compuesta por 327 parejas de madre y recién nacido, residentes de la ciudad de Durango, durante el periodo abril-junio de 1994. Para el an...

  2. Reflexões acerca da crioterapia na fase aguda da artrite reumatóide e suas correlações com a crioglobulinemia

    OpenAIRE

    Dahyan Wagner da Silva Silveira; Eduardo Nagib Boery; Rita Narriman Silva de Oliveira Boery

    2006-01-01

    Artrite Reumatóide é uma doença sistêmica, caracterizada por um quadro inflamatório crônico com sinovite poliarticular persistente, de etiologia desconhecida e com grande potencial deformante. A imunoglobulina alterada é encontrada na maioria dos portadores, o que aumenta a probabilidade do paciente produzir crioglobulinas e desenvolver vasculite crioglobulinêmica. O objetivo deste estudo é analisar a indicação e a utilização da crioterapia no tratamento da fase aguda da Artrite Reumatóide e ...

  3. Atividade antimicrobiana in vitro de produtos vegetais em otite externa aguda In vitro antimicrobial activity of plants in Acute Otitis Externa

    OpenAIRE

    Janaina Cândida Rodrigues Nogueira; Margareth de Fátima Melo Diniz; EDELTRUDES O. LIMA

    2008-01-01

    Otite externa aguda é a inflamação do conduto auditivo externo, e plantas medicinais podem ser utilizadas, na cultura popular, para seu tratamento. OBJETIVO: Avaliar atividade antimicrobiana in vitro de Aleolanthus suaveolens, Caryophyllus aromaticus, Cymbopogon citratus, Matricaria chamomila, Pithecellobium avaremotemo, Plectranthus amboinicus e Ruta graveolens sobre agentes etiológicos de otite externa. CASUÍSTICA E MÉTODOS: A concentração inibitória mínima de extratos e óleos destas planta...

  4. Pancreatitis aguda necrotizante en una intoxicación fatal por metadona Acute necrotizing pancreatitis in a fatal poisoning with methadone

    OpenAIRE

    A. Sibón; Ballesteros, S.; Martínez, M C

    2004-01-01

    La pancreatitis necrotizante es una causa infrecuente de muerte súbita. La metadona, un fármaco empleado en el tratamiento sustitutivo de adictos a opiáceos, ha sido responsable de muertes tras su ingestión accidental por niños cuando estaba a su alcance, en intentos autolíticos o después de un período de abstinencia en pacientes con tolerancia. La muerte se debe a depresión del sistema nervioso central y depresión respiratoria. Reportamos un caso de muerte súbita con pancreatitis aguda necro...

  5. Factores predictores de mediastinitis aguda en cirugía cardiovascular, protocolo de prevención y algoritmos diagnostico y terapéutico

    OpenAIRE

    Machín Rodríguez, Jorge Carlos

    2013-01-01

    Se efectuó una investigación con el objetivo de identificar los factores predictores de mediastinitis aguda posoperatoria y describir los resultados de la aplicación del protocolo de prevención y de los algoritmos para su diagnóstico y terapéutica en el Cardiocentro de Santiago de Cuba; esta incluyó tres diseños metodológicos: uno para caracterizar a los pacientes con infección mediastínica, una investigación de casos y controles para determinar los factores predictores de esta complicación y...

  6. Optimización de la mecánica respiratoria en el tratamiento de soporte ventilatorio de pacientes con insuficiencia respiratoria aguda grave

    OpenAIRE

    Morán Chorro, Indalecio

    2013-01-01

    Esta tesis se articula como compendio de publicaciones. En ella se incluyen tres estudios originales y una revisión que se enmarcan en una misma línea de investigación clínica enfocada a analizar la implementación de diferentes estrategias durante la ventilación mecánica invasiva de pacientes con insuficiencia respiratoria aguda grave. Las maniobras estudiadas se han dirigido a la optimización individual de los parámetros ventilatorios, a la mejora del intercambio de gases y a la minimización...

  7. Indicación de la fisioterapia respiratoria convencional en la bronquiolitis aguda Indications of conventional chest physiotherapy in acute bronchiolitis

    OpenAIRE

    Liliana Bohé; María Elisa Ferrero; Eduardo Cuestas; Laura Polliotto; Mariza Genoff

    2004-01-01

    Los objetivos de este trabajo fueron evaluar la utilidad de la fisioterapia respiratoria convencional en el tratamiento de la bronquiolitis aguda y determinar su influencia sobre los días de hospitalización. Se realizó un ensayo clínico controlado aleatorizado, donde se incluyeron dieciseis pacientes con bronquiolitis que fueron tratados dos veces al día con fisioterapia torácica y se compararon con dieciséis pacientes control, con la misma patología, quienes recibían sólo aspiración nasofarí...

  8. Anemia Megaloblástica Aguda por Inalação de Óxido Nitroso em Doente com Patologia Autoimune Múltipla

    OpenAIRE

    Barbosa, L; Leal, I.; Timóteo, AT; Matias, T

    2000-01-01

    As anemias megaloblásticas são habitualmente vistas como doenças crónicas de aparecimento insidioso. No entanto, um estado megaloblástico pode aparecer em apenas alguns dias devido à deficiência aguda de ácido fólico ou vitamina B12. Uma das causas mais comuns, embora pouco relatada, é acção tissular do óxido nitroso (NO2), substancia volátil utilizada comummente em anestesia. Efectivamente, o N02 inactiva a metilcobalamina, levando ao rápido desenvolvimento de uma hematopoies...

  9. Endoftalmitis aguda posterior a cirugía de catarata:resultados de un protocolo de diagnóstico y tratamiento

    OpenAIRE

    Ramos López, Meisy

    2011-01-01

    Se realizó un estudio observacional analítico de cohorte retrospectiva de individuos operados de catarata en el período de los años 2000 -2009 en el Instituto Cubano de Oftalmología “Ramón Pando Ferrer”. El propósito de este estudio fue describir la incidencia de Endoftalmitis aguda postoperatoria de catarata en dos períodos: 2000-2007, con tratamientos a criterios del oftalmólogo de asistencia y posterior al 2008 con aplicación de un protocolo de diagnóstico y tratamiento diseñado y validado...

  10. Insuficiência respiratória aguda durante anestesia pediátrica: atelectasia e pneumotórax hipertensivo: relato de caso

    OpenAIRE

    Joel Massari Rezende; Bruno Ricciardi Silveira

    2012-01-01

    JUSTIFICATIVA E OBJETIVOS: A tarefa primordial do anestesiologista é garantir a adequada oxigenação do paciente. O objetivo deste relato é des crever o diagnóstico e conduta em um caso de insuficiência respiratória aguda durante anestesia, com finalidade didática. RELATO DO CASO: Criança de três anos submetida à anestesia para cirurgia urológica apresentou insuficiência respiratória por obstruções de brônquios por secreção, evoluindo com atelectasia e pneumotórax hipertensivo. Apresentamos o ...

  11. Respuesta inflamatoria de la Célula Acinar a diferentes lípidos generados en grasa necrotica durante la pancreatitit aguda

    OpenAIRE

    Mateu Rico, Alberto

    2016-01-01

    [ES] La pancreatitis aguda (PA) es una enfermedad inflamatoria del páncreas en la que tiene lugar la secreción anormal al intersticio pancreático de enzimas digestivas como lipasas y fosfolipasas. Durante la PA se liberan grandes cantidades de ácidos grasos (AGs) y fosfolípidos (FLs) desde grasa peripancreática, habiéndose demostrado su capacidad para modular la respuesta inflamatoria. Como resultado del daño inicial del páncreas, se produce un reclutamiento masivo de leucocitos hacia la glán...

  12. Inmunofenotipos aberrantes en leucemias agudas en una población hospitalaria de Buenos Aires Aberrant immunophenotypes in acute leukemia in a Buenos Aires' hospital population

    OpenAIRE

    Viviana Novoa; Neri A. Núñez; Orlando G. Carballo; Carmen F. Lessa

    2013-01-01

    La citometría de flujo multiparamétrica es el método de elección para la caracterización inmunofenotípica de las células hematopoyéticas clonales presentes en los distintos procesos leucémicos agudos. El objetivo fue analizar la expresión de antígenos de membrana y evaluar la presencia de fenotipos aberrantes en los blastos de pacientes con diagnóstico de leucemia aguda, que permiten el monitoreo de la respuesta al tratamiento. Se revisaron los inmunofenotipos de 364 muestras de pacientes adu...

  13. Factores socioeconómicos que inciden en el abandono del tratamiento médico por pacientes pediátricos con leucemia aguda

    OpenAIRE

    Isaac Otero, Gabriela; Instituto Nacional de Pediatría; Méndez Venegas, José; Instituto Nacional de Pediatría; Mora Magaña, Ignacio; Instituto Nacional de Pediatría; Leal Leal, Carlos; Instituto Nacional de Pediatría

    2013-01-01

    El objetivo del presente estudio fue describir la frecuencia de abandono del tratamiento médico por leucemia aguda por pacientes pediátricos sobre la base de características psicosociales y estadio de la enfermedad. Para ello, se revisaron 134 expedientes clínicos de aquellos pacientes atendidos a lo largo de cinco años. Los resultados muestran un índice de abandono de casi una cuarta parte. El nivel socioeconómico resultó significativo para dicho abandono del tratamiento, siendo la pobreza e...

  14. Quimioterapia intensiva en niños con leucemia linfoblástica aguda. Análisis ínterin en un centro de referencia en Colombia

    OpenAIRE

    Trujillo Gaviria, Ángela María

    2015-01-01

    Antecedentes: La leucemia linfoide aguda es el cáncer más frecuente en los niños. La sobrevida está alrededor de 80% en países desarrollados. En países de bajos ingresos hay menor curación, probablemente por altas tasas de recaída, abandono de tratamiento y muerte relacionada con el tratamiento. Objetivo: Hacer una evaluación ínterin de muerte en inducción y relacionada con el tratamiento, recaídas, abandonos de tratamiento, describir la toxicidad más frecuentemente observada y evaluar la sob...

  15. Lesão renal aguda por glicerol: efeito antioxidante da Vitis vinifera L Acute kidney injury by glycerol: antioxidant effect of Vitis vinifera L

    OpenAIRE

    Elisabete Cristina de Oliveira Martim; Carolina Ferreira Pinto; Mirian Watanabe; Maria de Fátima Fernandes Vattimo

    2007-01-01

    JUSTIFICATIVA E OBJETIVOS: A lesão renal aguda (LRA) é a complicação mais grave da rabdomiólise. Nessa síndrome, a liberação do pigmento heme desencadeia uma lesão que se caracteriza por vasoconstrição glomerular e toxicidade celular direta com provável componente oxidante. A renoproteção com antioxidantes tem demonstrado efeito satisfatório. As proantocianidinas são antioxidantes naturais encontradas no extrato da semente da uva. O objetivo deste estudo foi avaliar o efeito antioxidante da V...

  16. Radioprotective thermally generated free-radical dextrins

    Institute of Scientific and Technical Information of China (English)

    Piotr TOMASIK; Oskar MICHALSKI; Ewa BIDZINSKA; Antonina CEBULSKA-WASILEWSKA; Krystyna DYREK; Maciej FIEDOROWICZ; Pawel OLKO

    2008-01-01

    Effect of doses of the X-ray radiation from 0 to 400 Gy upon granular cornstarch and dextrins (British gums, BG) thermally generated from it at 230-300℃ was recognized with quantitative EPR and IR ab-sorption spectroscopy, molecular mass distribution in the depolymerization products, Scanning Elec-tron Microscopy, and X-ray diffractometry. Fractal analysis of the profiles of molecular mass distribu-tion showed that the depolymerization involved debranching of amylopectin. Roasting of cornstarch produced BG which differed in concentration and EPR parameters of stable free radicals from BG generated by X-ray radiation. Two types of stable free radicals, with Gaussian and Lorentzian shapes of EPR signals, were recognized. The shapes of the signals and temperature dependence on free radical intensity indicated exchanging interactions of the antiferromagnetic type, causing partial quenching of the spins at -196℃ (77K). Upon X-ray irradiation, new radicals were generated, the number and stability of which strongly depended on the types of radicals present before irradiation. These radicals slowly ceased because of a repolymerization of BG on storage.

  17. Inactivation of Bacillus atrophaeus by OH radicals

    Science.gov (United States)

    Ono, Ryo; Yonetamari, Kenta; Tokumitsu, Yusuke; Yonemori, Seiya; Yasuda, Hachiro; Mizuno, Akira

    2016-08-01

    The inactivation of Bacillus atrophaeus by OH radicals is measured. This study aims to evaluate the bactericidal effects of OH radicals produced by atmospheric-pressure nonthermal plasma widely used for plasma medicine; however, in this study, OH radicals are produced by vacuum ultraviolet (VUV) photolysis of water vapor instead of plasma to allow the production of OH radicals with almost no other reactive species. A 172 nm VUV light from a Xe2 excimer lamp irradiates a He–H2O mixture flowing in a quartz tube to photodissociate H2O to produce OH, H, O, HO2, H2O2, and O3. The produced reactive oxygen species (ROS) flow out of the quartz tube nozzle to the bacteria on an agar plate and cause inactivation. The inactivation by OH radicals among the six ROS is observed by properly setting the experimental conditions with the help of simulations calculating the ROS densities. A 30 s treatment with approximately 0.1 ppm OH radicals causes visible inactivation.

  18. Injúria renal aguda em unidade de terapia intensiva: estudo prospectivo sobre a incidência, fatores de risco e mortalidade Acute kidney injury in intensive care unit patients: a prospective study on incidence, risk factors and

    OpenAIRE

    Daniela Ponce; Caroline de Pietro Franco Zorzenon; Nara Yamane dos Santos; Ubirajara Aparecido Teixeira; André Luís Balbi

    2011-01-01

    OBJETIVO: Comparar características clínicas e evolução de pacientes com e sem injúria renal aguda adquirida em unidade de terapia intensiva geral de um hospital universitário terciário e identificar fatores de risco associados ao desenvolvimento de injúria renal aguda e à mortalidade. MÉTODOS: Estudo prospectivo observacional com 564 pacientes acompanhados diariamente durante a internação em unidade de terapia intensiva geral do Hospital das Clínicas da Faculdade de Medicina de Botucatu por 2...

  19. Excesso de peso em crianças e adolescentes sobreviventes de leucemia linfoide aguda: estudo de coorte Excessive weight in children and adolescents surviving acute lymphoid leukemia: a cohort study

    OpenAIRE

    Alves, João Guilherme B; Clarissa M. A. Pontes; Mecneide M. Lins

    2009-01-01

    A leucemia linfoide aguda (LLA) é a neoplasia maligna mais comum na infância. A taxa de cura é hoje em torno de 80% e entre os sobreviventes tem sido descrito um aumento de risco de obesidade. Entretanto, não há estudos sobre esse risco em países em desenvolvimento, especialmente naqueles que atravessam um momento de transição nutricional, como o Brasil. O objetivo do estudo foi verificar a frequência de excesso de peso em crianças e adolescentes sobreviventes de leucemia linfoide aguda. Foi ...

  20. Estado nutricional de crianças e adolescentes sobreviventes de leucemia linfoide aguda tratados em um Centro de Referência da Região Nordeste do Brasil

    OpenAIRE

    Bianca Araújo de Oliveira; Mecneide Mendes Lins; Francisco Pedrosa; Poliana Coelho Cabral; Janine Maciel Barbosa

    2013-01-01

    OBJETIVO: Avaliar o estado nutricional e os fatores clínicos, laboratoriais e comportamentais associados ao excesso de peso em crianças e adolescentes sobreviventes de leucemia linfoide aguda, tratados em um centro de referência da Região Nordeste do Brasil. MÉTODOS: Estudo de série de casos com 30 sobreviventes de leucemia linfoide aguda. Entre os meses de março e setembro de 2011, foram coletados dados clínicos, comportamentais e laboratoriais. O diagnóstico antropométrico foi realizado em ...

  1. Presença de anticorpo anti-Lutheran B em paciente com leucemia linfóide aguda Anti-Lutheran B in a patient with acute lymphoblastic leukemia

    OpenAIRE

    Maria do Rosário F. Roberti; Cristiane A. Tuma; Janeslane F. Maciel

    2007-01-01

    Leucemias agudas necessitam de suporte hemoterápico para serem tratadas adequadamente. A presença do anticorpo anti-Lutheran B e a alta freqüência do antígeno em nossa população dificulta o tratamento de doenças hematológicas que necessitam de suporte transfusional, tais como a leucemia linfóide aguda (LLA). Alternativas de tratamento hemoterápico são abordadas neste artigo. Descreve-se o caso de uma paciente com LLA e anticorpo anti-Lutheran B. A dificuldade em encontrar sangue compatível le...

  2. Conducta de Infecciones Respiratorias Agudas con/sin Neumonías en menores de 5 años del Centro de Salud “San Benito”, Abril-Junio del 2010

    OpenAIRE

    Alfredo Chuca Tumiri; Jimena Choque Verduguez; Maria Julia Perez Terceros; Edson Escobar Melendres

    2011-01-01

    Se asume como Infección Respiratoria Aguda al conjunto de infecciones del aparato respiratorio causadas pormicroorganismos, con evolución menor a 15 días, donde la forma más común de presentación, es la RinofaringitisAguda Catarral; con la presencia de signos clínicos, los cuales pueden estar o no acompañados de fiebre y que enocasiones se complican con neumonía.El objetivo del presente trabajo es determinar cuál es la prevalencia y terapéutica de infecciones respiratoriasagudas con o sin neu...

  3. Tipo de lactancia y su relación con el patrón de crecimiento y frecuencia de infección respiratoria y enfermedad diarreica agudas

    OpenAIRE

    R. Espinoza Zavala; P. Ocampo-Barrio; J. Quiroz-Pérez

    2005-01-01

    Objetivo: Comparar el patrón de crecimiento ponderal, frecuencia de Infección respiratoria aguda (IRA) y enfermedad diarreica aguda (EDA) del lactante menor de acuerdo al tipo de lactancia. Diseño: Estudio descriptivo, transversal y comparativo. Material y Métodos: Muestra no probabilística por conveniencia que incluyó el total de niños atendidos por la Enfermera Materno Infantil en el primer semestre del año 2004. Se integraron a 116 lactantes menores de acuerdo al tipo de lactancia durante ...

  4. Características y resultado a largo plazo de pacientes mayores con leucemia promielocítica aguda tratados con esquemas terapéuticos basados en ATRA más antraciclinas

    OpenAIRE

    Martínez Cuadrón, David

    2015-01-01

    La leucemia promielocítica aguda (LPA) es un subtipo de leucemia mieloide aguda que se diferencia por una morfología característica y la presencia de la t(15;17) y su correspondiente reordenamiento molecular PML/RARa. Clínicamente, no es infrecuente que se presente con coagulopatía, pudiendo ser la responsable de la muerte del paciente incluso antes del diagnóstico. No obstante, su buena respuesta al tratamiento con ácido holo-trans retinoico (ATRA) se ha traducido en una importante mejoría d...

  5. Hemograma e proteínas de fase aguda de bezerros sadios do nascimento aos 30 dias de idade

    Directory of Open Access Journals (Sweden)

    Thaís G. Rocha

    2013-12-01

    Full Text Available O conhecimento da dinâmica das alterações nos parâmetros hematológicos e na cinética das proteínas de fase aguda em animais saudáveis nas primeiras semanas de vida é essencial para a interpretação correta dessas avaliações em situações de morbidez e para diferenciar animais sadios e enfermos de forma confiável. Com o intuito de avaliar a cinética desses parâmetros no primeiro mês de vida de bezerros de corte sadios, filhos de vacas primíparas ou pluríparas, amostras de sangue foram coletadas antes da ingestão de colostro e 1, 2, 7, 15 e 30 dias após o nascimento. Os parâmetros eritrocitários foram influenciados pelo número de partos das vacas e o leucograma mostrou alterações características de influência do cortisol fetal liberado por ocasião do nascimento. O teor sérico de proteína total aumentou significativamente após a ingestão do colostro. As concentrações de ceruloplasmina, haptoglobina e proteínas de pesos moleculares 33 kDa e 23 kDa aumentaram significativamente no primeiro dia de vida, seja pela resposta ao nascimento ou pela ingestão do colostro, enquanto os teores de transferrina, albumina e α1-glicoproteína ácida mantiveram-se relativamente estáveis nos primeiros dias de vida, aumentando gradualmente até os 30 dias de idade.

  6. Complicaciones agudas de la radioterapia externa convencional en el paciente con cáncer de próstata

    Directory of Open Access Journals (Sweden)

    Yandry Medina González

    2014-08-01

    Full Text Available Se realizó un estudio descriptivo y retrospectivo con la finalidad de identificar las toxicidades agudas más frecuentes, provocadas por el tratamiento de radioterapia externa convencional en dos dimensiones, en los pacientes diagnosticados con cáncer de próstata en el Instituto Nacional de Oncología y Radiobiología (INOR, en el período comprendido entre 2008 y 2012. Además se evaluaron otras variables de interés para una mejor descripción de la serie. El universo lo constituyeron los adultos con cáncer de próstata inscritos en el INOR (235 y la muestra fue de 138 individuos con cáncer de próstata confirmado y con criterio de recibir tratamiento radiante. Se obtuvo la información a través de la revisión de las historias clínicas que se encontraban en el archivo del Departamento, previa confección de un cuestionario, que se utilizó como instrumento para la recolección de los datos y que permitió evaluar las variables trazadas. Los resultados obtenidos fueron expresados en porcientos y se plasmaron en tablas. Se pudo llegar a la conclusión de que predominaron las edades comprendidas entre 60 y 79 años, los pacientes en etapa clínica III, así como la enfermedad de alto riesgo. Las toxicidades que prevalecieron fueron la disuria, la diarrea y la polaquiuria

  7. Modelo epidemiológico para el diagnóstico de intoxicación aguda por plaguicidas

    Directory of Open Access Journals (Sweden)

    J.E Altamirano

    2004-01-01

    Full Text Available Se ha investigado en San Salvador de Jujuy el impacto de plaguicidas sobre poblaciones expuestas y para ello se diseñó un modelo epidemiológico que permita diagnosticar Intoxicación Aguda por Plaguicida (IAP, identificar poblaciones en riesgo e investigar parámetros de intoxicaciones. El modelo epidemiológico propuesto se inicia con una capacitación a los agentes sanitarios del hospital en el cual se desarrolla el estudio a fin de introducirlos en la temática, actualizar sus conocimientos al respecto y entrenarlos para realizar la encuesta adjunta al modelo. En esta investigación se evalúan y clasifican los síntomas que los encuestados reconocen haber sufrido, definido previamente los criterios de especificidad (número de síntomas y se agrupa la población investigada según la especificidad de sus síntomas. Aquellos encuestados que registraron simultáneamente cinco o más síntomas especificados se diagnostican como IAP y de esa población la que no acudió durante el evento a un servicio de salud, es considerado subregistro. Este modelo fue probado en una población de trabajadores rurales del tabaco en el departamento El Carmen (Jujuy. Aplicado el modelo se concluye que el 25% de esta población tuvo al menos una IAP y aproximadamente la mitad (49,5% de ellos no acudieron a servicios de salud, lo que constituye el subregistro de IAP. Hay una problemática grave minimizada por la falta de registro y desconocida para acciones de prevención

  8. Siolmatra brasiliensis (Cogn. Baill., Cucurbitaceae, acute toxicity in mice Toxicidade aguda de Siolmatra brasiliensis (Cogn. Baill., Cucurbitaceae, em camundongos

    Directory of Open Access Journals (Sweden)

    Aliny P. Lima

    2010-12-01

    Full Text Available Siolmatra brasiliensis (Cogn. Baill., Cucurbitaceae, commonly known as "pluméria" or "taiuiá", is widely used in different ways in Brazilian popular medicine to treat several diseases. Acute toxicity of Siolmatra brasiliensis crude ethanolic extract (CEE was investigated in mice. No mortality or signs of CEE toxicity were observed at the doses of 10 and 100 mg/kg bw, but the administration of 1000 and 2000 mg/kg bw caused several adverse behavioral effects and mortality. Macroscopic inspection of the organs showed morphologic alterations in the heart of animals treated with doses of 1000 and 2000 mg/kg bw. According to our results, S. brasiliensis CEE has an LD50 of 1000 mg/kg bw. We conclude that S. brasiliensis CEE was safe at the doses of 10 and 100 mg/kg bw and presented toxicity at the doses of 1000 and 2000 mg/kg bw.Siolmatra brasiliensis (Cogn. Baill., Cucurbitaceae, popularmente conhecida como "pluméria" ou "taiuiá" é utilizada na medicina popular brasileira para diversos fins terapêuticos. O estudo de toxicidade aguda do extrato bruto etanólico (EBE de Siolmatra brasiliensis foi investigado em camundongos. Nenhuma mortalidade ou sinais de toxicidade foram observados nas doses de 10 e 100 mg/kg, entretanto em doses administradas de 1000 e 2000 mg/kg levou as diversas alterações comportamentais e mortalidade. A DL50 para o EBE foi de 1000 mg/kg. Análise macroscópica dos órgãos demonstrou alterações morfológicas no coração dos animais tratados com 1000 e 2000 mg/kg. Por meios destes resultados conclui-se que o EBE de Siolmatra brasiliensis é seguro em doses de 10 and 100 mg/kg e apresentou toxicidade nas doses de 1000 e 2000 mg/kg.

  9. Radicalization and Radical Catalysis of Biomass Sugars: Insights from First-principles Studies

    Science.gov (United States)

    Yang, Gang; Zhu, Chang; Zou, Xianli; Zhou, Lijun

    2016-01-01

    Ab initio and density functional calculations are conducted to investigate the radicalization processes and radical catalysis of biomass sugars. Structural alterations due to radicalization generally focus on the radicalized sites, and radicalization affects H-bonds in D-fructofuranose more than in D-glucopyranose, potentially with outcome of new H-bonds. Performances of different functionals and basis sets are evaluated for all radicalization processes, and enthalpy changes and Gibbs free energies for these processes are presented with high accuracy, which can be referenced for subsequent experimental and theoretical studies. It shows that radicalization can be utilized for direct transformation of biomass sugars, and for each sugar, C rather than O sites are always preferred for radicalization, thus suggesting the possibility to activate C-H bonds of biomass sugars. Radical catalysis is further combined with Brønsted acids, and it clearly states that functionalization fundamentally regulates the catalytic effects of biomass sugars. In presence of explicit water molecules, functionalization significantly affects the activation barriers and reaction energies of protonation rather than dehydration steps. Tertiary butyl and phenyl groups with large steric hindrances or hydroxyl and amino groups resulting in high stabilities for protonation products drive the protonation steps to occur facilely at ambient conditions. PMID:27405843

  10. Radicalization and Radical Catalysis of Biomass Sugars: Insights from First-principles Studies

    Science.gov (United States)

    Yang, Gang; Zhu, Chang; Zou, Xianli; Zhou, Lijun

    2016-07-01

    Ab initio and density functional calculations are conducted to investigate the radicalization processes and radical catalysis of biomass sugars. Structural alterations due to radicalization generally focus on the radicalized sites, and radicalization affects H-bonds in D-fructofuranose more than in D-glucopyranose, potentially with outcome of new H-bonds. Performances of different functionals and basis sets are evaluated for all radicalization processes, and enthalpy changes and Gibbs free energies for these processes are presented with high accuracy, which can be referenced for subsequent experimental and theoretical studies. It shows that radicalization can be utilized for direct transformation of biomass sugars, and for each sugar, C rather than O sites are always preferred for radicalization, thus suggesting the possibility to activate C-H bonds of biomass sugars. Radical catalysis is further combined with Brønsted acids, and it clearly states that functionalization fundamentally regulates the catalytic effects of biomass sugars. In presence of explicit water molecules, functionalization significantly affects the activation barriers and reaction energies of protonation rather than dehydration steps. Tertiary butyl and phenyl groups with large steric hindrances or hydroxyl and amino groups resulting in high stabilities for protonation products drive the protonation steps to occur facilely at ambient conditions.

  11. ESR study on carboxymethyl chitosan radicals in an aqueous solution

    Energy Technology Data Exchange (ETDEWEB)

    Saiki, Seiichi, E-mail: saiki.seiichi@jaea.go.j [Graduate School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656 (Japan); Quantum Beam Science Directorate, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292 (Japan); Nagasawa, Naotsugu; Hiroki, Akihiro; Morishita, Norio; Tamada, Masao [Quantum Beam Science Directorate, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292 (Japan); Muroya, Yusa; Kudo, Hisaaki [Graduate School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656 (Japan); Katsumura, Yosuke [Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656 (Japan); Advanced Science Research Center, Japan Atomic Energy Agency, 2-4 Shirakata-Shirane, Tokai, Naka, Ibaraki 319-1195 (Japan)

    2010-03-15

    Carboxymethyl chitosan (CMCTS) at a highly concentrated aqueous solution forms hydrogel by ionizing irradiation. To study on radiation-induced reaction mechanism of CMCTS in an aqueous solution, CMCTS radicals formed by reactions with OH radical were observed by ESR method. As a result of ESR spectral analysis, CMCTS radicals were identified as radicals on carboxymethyl groups.

  12. DFT and ENDOR Study of Bixin Radical Cations and Neutral Radicals on Silica-Alumina.

    Science.gov (United States)

    Tay-Agbozo, Sefadzi S; Krzyaniak, Matthew D; Bowman, Michael K; Street, Shane; Kispert, Lowell D

    2015-06-18

    Bixin, a carotenoid found in annatto (Bixa orellana), is unique among natural carotenoids by being water-soluble. We stabilized free radicals from bixin on the surface of silica-alumina (Si-Al) and characterized them by pulsed electron-nuclear double resonance (ENDOR). DFT calculations of unpaired electron spin distribution for various bixin radicals predict the EPR hyperfine couplings. Least-square fitting of experimental ENDOR spectra by spectra calculated from DFT hyperfine couplings characterized the radicals trapped on Si-Al. DFT predicts that the trans bixin radical cation is more stable than the cis bixin radical cation by 1.26 kcal/mol. This small energy difference is consistent with the 26% trans and 23% cis radical cations in the ENDOR spectrum. The remainder of the ENDOR spectrum is due to several neutral radicals formed by loss of a H(+) ion from the 9, 9', 13, or 13' methyl group, a common occurrence in all water-insoluble carotenoids previously studied. Although carboxyl groups of bixin strongly affect its solubility relative to other natural carotenoids, they do not alter properties of its free radicals based on DFT calculations and EPR measurements which remain similar to typical water-insoluble carotenoids. PMID:25333911

  13. How Radical is a Radical Innovation? An Outline for a Computational Approach

    NARCIS (Netherlands)

    Kasmire, J.; Korhonen, J.M.; Nikolic, I.

    2012-01-01

    Radical innovations prompt significant subsequent technological development and exhibit novelty and “architectural” innovation, i.e. rearranging the way design elements are put together in a system. Thus, radical innovations often serve as the foundation for new technological systems, industries or

  14. Trombosis de la vena yugular interna y mediastinitis aguda necrosante descendente debido a una faringoamigdalitis aguda Thrombosis of the internal jugular vein and descending necrotizing mediastinitis due to acute pharyngotonsilitis

    Directory of Open Access Journals (Sweden)

    Celia Sánchez Acedo

    2010-09-01

    Full Text Available El síndrome de Lemierre es una patología muy infrecuente en la época actual, pero muy grave, y siempre debe considerarse ante un cuadro de fiebre con antecedente de infección orofaríngea, tumefacción laterocervical a lo largo del músculo esternocleidomastoideo y signos de sepsis. El diagnóstico de este síndrome es fundamentalmente clínico, y las pruebas complementarias tan sólo ayudan a confirmar el cuadro. Presentamos el caso de un varón de 31 años que acudió a urgencias con clínica de faringoamigdalitis junto con tumefacción en la región submandibular izquierda e importante dolor cervical ipsilateral, que mostró un deterioro rápido y progresivo del estado general pese al tratamiento antibiótico intravenoso. Finalmente tuvo que ser intervenido debido al desarrollo de mediastinitis aguda necrosante descendente desde la región pretiroidea hasta el diafragma, con trombosis de la vena yugular interna izquierda. Se le realizó toracotomía urgente y cervicotomía izquierda con drenaje de abundante material purulento y ligadura de la vena yugular interna.Lemierre syndrome is a potentially fatal condition after an oropharyngeal infection. It is characterized by thrombophlebitis of head and neck veins with systemic dissemination of septic emboli. The diagnosis of this syndrome is mainly clinical and complementary test only serve as aid to confirm it. We report an unusual case of Lemierre syndrome in a 31-year-old man caused by Gemella spp. and Streptococcus pyogenes. It developed following a pharyngotonsillitis infection, which deteriorated rapidly and progressively despite intravenous antibiotic treatment. He finally had to be intervened due to developing acute descending necrotizing mediastinitis from the pre-thyroid region to the diaphragm, with thrombosis of the internal jugular vein. An urgent thoracotomy and left cervicotomy was performed, with drainage of abundant purulent material and ligature of the internal jugular vein

  15. Tuning the Reactivity of Radical through a Triplet Diradical Cu(II) Intermediate in Radical Oxidative Cross-Coupling

    Science.gov (United States)

    Zhou, Liangliang; Yi, Hong; Zhu, Lei; Qi, Xiaotian; Jiang, Hanpeng; Liu, Chao; Feng, Yuqi; Lan, Yu; Lei, Aiwen

    2015-11-01

    Highly selective radical/radical cross-coupling is paid more attention in bond formations. However, due to their intrinsic active properties, radical species are apt to achieve homo-coupling instead of cross-coupling, which makes the selective cross-coupling as a great challenge and almost untouched. Herein a notable strategy to accomplish direct radical/radical oxidative cross-coupling has been demonstrated, that is metal tuning a transient radical to a persistent radical intermediate followed by coupling with another transient radical. Here, a transient nitrogen-centered radical is tuned to a persistent radical complex by copper catalyst, followed by coupling with a transient allylic carbon-centered radical. Firstly, nitrogen-centered radical generated from N-methoxybenzamide stabilized by copper catalyst was successfully observed by EPR. Then DFT calculations revealed that a triplet diradical Cu(II) complex formed from the chelation N-methoxybenzamide nitrogen-centered radical to Cu(II) is a persistent radical species. Moreover, conceivable nitrogen-centered radical Cu(II) complex was observed by high-resolution electrospray ionization mass spectrometry (ESI-MS). Ultimately, various allylic amides derivatives were obtained in good yields by adopting this strategy, which might inspire a novel and promising landscape in radical chemistry.

  16. Acute pancreatitis as a postburn complication: report of two cases in children Pancreatitis aguda como complicación de quemadura en dos niños

    Directory of Open Access Journals (Sweden)

    Jairo Alberto Patarroyo Serrano

    2007-04-01

    Full Text Available Acute pancreatitis in burnt adults has been reported with some frequency; contrariwise, there has been only one report of this complication in a burnt child. We reviewed the medical records of two childrenwith acute pancreatitis as a postburn complication, who were treated at the Burns Unit of the San Vicente de Paúl Hospital, in Medellín, Colombia. As a result, we add two documented cases to the limited literature on this subject. La pancreatitis aguda ha sido reportada con alguna frecuencia en adultos quemados pero sólo se ha publicado un caso de esta complicación en un niño quemado. Se revisan las historias clínicas de dos niños con pancreatitis aguda como complicación de quemaduras, atendidos en la Unidad de Quemados del Hospital Universitario San Vicente de Paúl (Medellín. Como resultado de la revisión se añaden dos casos bien documentados a la escasa literatura al respecto.

  17. Modeling Radicalization Phenomena in Heterogeneous Populations.

    Science.gov (United States)

    Galam, Serge; Javarone, Marco Alberto

    2016-01-01

    The phenomenon of radicalization is investigated within a mixed population composed of core and sensitive subpopulations. The latest includes first to third generation immigrants. Respective ways of life may be partially incompatible. In case of a conflict core agents behave as inflexible about the issue. In contrast, sensitive agents can decide either to live peacefully adjusting their way of life to the core one, or to oppose it with eventually joining violent activities. The interplay dynamics between peaceful and opponent sensitive agents is driven by pairwise interactions. These interactions occur both within the sensitive population and by mixing with core agents. The update process is monitored using a Lotka-Volterra-like Ordinary Differential Equation. Given an initial tiny minority of opponents that coexist with both inflexible and peaceful agents, we investigate implications on the emergence of radicalization. Opponents try to turn peaceful agents to opponents driving radicalization. However, inflexible core agents may step in to bring back opponents to a peaceful choice thus weakening the phenomenon. The required minimum individual core involvement to actually curb radicalization is calculated. It is found to be a function of both the majority or minority status of the sensitive subpopulation with respect to the core subpopulation and the degree of activeness of opponents. The results highlight the instrumental role core agents can have to hinder radicalization within the sensitive subpopulation. Some hints are outlined to favor novel public policies towards social integration. PMID:27166677

  18. Analysis of radicals induced in irradiated foods

    International Nuclear Information System (INIS)

    By electron spin resonance (ESR) spectroscopy, we revealed free radicals in γ-ray irradiated foods; black pepper, green coffee bean and ginseng. We also analyzed the decay behavior of radiation induced free radicals during storage of irradiated foods. The ESR spectrum of experimental irradiated foods consists of a sextet signal centered at g=2.0 and a singlet signal at the same g-value position and a singlet signal at g=4.0. The singlet signal at g=2.0 is originated from organic free radicals and its peak intensity showed the dependence of γ-ray irradiation dose levels. The signal intensity was decreased during storage. Only after 3 hours of radiation treatment the peak intensity was decreased fast and after that the intensity was decreased slowly. The relaxation times, T1 and T2, of radiation induced free radicals showed the variations before and after irradiation. During long time storage period it was shown that T1 was increased and T2 was decreased. By analysis of decay process using the simulation methods based on the theory of reaction speed, it is considered that at least two kinds of radicals were induced in irradiated foods during long time storage. (author)

  19. Modeling Radicalization Phenomena in Heterogeneous Populations

    Science.gov (United States)

    2016-01-01

    The phenomenon of radicalization is investigated within a mixed population composed of core and sensitive subpopulations. The latest includes first to third generation immigrants. Respective ways of life may be partially incompatible. In case of a conflict core agents behave as inflexible about the issue. In contrast, sensitive agents can decide either to live peacefully adjusting their way of life to the core one, or to oppose it with eventually joining violent activities. The interplay dynamics between peaceful and opponent sensitive agents is driven by pairwise interactions. These interactions occur both within the sensitive population and by mixing with core agents. The update process is monitored using a Lotka-Volterra-like Ordinary Differential Equation. Given an initial tiny minority of opponents that coexist with both inflexible and peaceful agents, we investigate implications on the emergence of radicalization. Opponents try to turn peaceful agents to opponents driving radicalization. However, inflexible core agents may step in to bring back opponents to a peaceful choice thus weakening the phenomenon. The required minimum individual core involvement to actually curb radicalization is calculated. It is found to be a function of both the majority or minority status of the sensitive subpopulation with respect to the core subpopulation and the degree of activeness of opponents. The results highlight the instrumental role core agents can have to hinder radicalization within the sensitive subpopulation. Some hints are outlined to favor novel public policies towards social integration. PMID:27166677

  20. Modeling Radicalization Phenomena in Heterogeneous Populations.

    Directory of Open Access Journals (Sweden)

    Serge Galam

    Full Text Available The phenomenon of radicalization is investigated within a mixed population composed of core and sensitive subpopulations. The latest includes first to third generation immigrants. Respective ways of life may be partially incompatible. In case of a conflict core agents behave as inflexible about the issue. In contrast, sensitive agents can decide either to live peacefully adjusting their way of life to the core one, or to oppose it with eventually joining violent activities. The interplay dynamics between peaceful and opponent sensitive agents is driven by pairwise interactions. These interactions occur both within the sensitive population and by mixing with core agents. The update process is monitored using a Lotka-Volterra-like Ordinary Differential Equation. Given an initial tiny minority of opponents that coexist with both inflexible and peaceful agents, we investigate implications on the emergence of radicalization. Opponents try to turn peaceful agents to opponents driving radicalization. However, inflexible core agents may step in to bring back opponents to a peaceful choice thus weakening the phenomenon. The required minimum individual core involvement to actually curb radicalization is calculated. It is found to be a function of both the majority or minority status of the sensitive subpopulation with respect to the core subpopulation and the degree of activeness of opponents. The results highlight the instrumental role core agents can have to hinder radicalization within the sensitive subpopulation. Some hints are outlined to favor novel public policies towards social integration.

  1. Formation of semiquinone radical anion and free radical scavenging reactions of plumbagin. A pulse radiolysis study

    International Nuclear Information System (INIS)

    Kinetics and mechanism of scavenging of reducing free radicals by plumbagin (5-hydroxy-2-methyl-1,4-naphthoquinone) are studied using pulse radiolysis technique. It scavenged superoxide radical, hydroxyethyl radical and hydrated electron with bimolecular rate constants of 8.9 × 107, 2.3 × 109 and 1.6 × 1010 M-1 s-1, respectively in aqueous-alcohol medium. Plumbagin also scavenged linoleic acid peroxyl radical and tyrosyl radical with bimolecular rate constants of 1.0 × 108 and 7.0 × 106 M-1 s-1, respectively. Further, redox properties of plumbagin and its transients are studied using standard redox couples and cyclic voltammetry. (author)

  2. Resveratrol products resulting by free radical attack

    Energy Technology Data Exchange (ETDEWEB)

    Bader, Yvonne; Quint, R.M. [Section Radiation Biology, Department of Nutritional Sciences, Faculty of Life Sciences, University of Vienna, UZAII, Althanstrasse 14, A-1090 Vienna (Austria); Getoff, Nikola [Section Radiation Biology, Department of Nutritional Sciences, Faculty of Life Sciences, University of Vienna, UZAII, Althanstrasse 14, A-1090 Vienna (Austria)], E-mail: nikola.getoff@univie.ac.at

    2008-06-15

    Trans-resveratrol (trans-3,4',5-trihydroxystilbene; RES), which is contained in red wine and many plants, is one of the most relevant and extensively investigated stilbenes with a broad spectrum of biological activities. Among other duties, RES has been reported to have anti-carcinogenetic activities, which could be attributed to its antioxidant properties. The degradation of RES was studied under various conditions. The products (aldehydes, carboxylic acids, etc.) generated from RES by the attack of free radicals were registered as a function of the radical concentration (absorbed radiation dose). Based on the obtained data it appears that the OH radicals are initiating the rather complicated process, which involves of the numerous consecutive reactions. A possible starting reaction mechanism is presented.

  3. Resveratrol products resulting by free radical attack

    Science.gov (United States)

    Bader, Yvonne; Quint, R. M.; Getoff, Nikola

    2008-06-01

    Trans-resveratrol ( trans-3,4',5-trihydroxystilbene; RES), which is contained in red wine and many plants, is one of the most relevant and extensively investigated stilbenes with a broad spectrum of biological activities. Among other duties, RES has been reported to have anti-carcinogenetic activities, which could be attributed to its antioxidant properties. The degradation of RES was studied under various conditions. The products (aldehydes, carboxylic acids, etc.) generated from RES by the attack of free radicals were registered as a function of the radical concentration (absorbed radiation dose). Based on the obtained data it appears that the OH radicals are initiating the rather complicated process, which involves of the numerous consecutive reactions. A possible starting reaction mechanism is presented.

  4. Radiation chemistry of aromatic dimer radical cations

    International Nuclear Information System (INIS)

    π-π Interactions of aromatic molecules are paid attention much in many fields, especially biology, chemistry, and applied physics, represented as protein, DNA, electron donor-accepter complexes, charge transfers, and self assembly molecules. Aromatic molecules including benzene rings are the simplest case to study the π-π interactions. To interpret the charge resonance (CR) structure in the dimer radical cations, spectroscopic and ESR methods have been carried out. The spectroscopic study on the dimer radical ion of molecules with two chromophores would be profitable to identify the electronic and configurational properties. In this article, dynamics of the dimer radical cation of benzenes, polystyrenes, and resist polymers is described on the basis of direct observation of CR band by the nanosecond pulse radiolysis and low temperature γ-radiolysis methods. (author)

  5. Exploring how lead users develop radical innovation

    DEFF Research Database (Denmark)

    Lettl, Christopher; Gemuenden, Hans Georg; Hienerth, C.

    2008-01-01

    in order to transform their radically new solutions into functional prototypes and then to convince established manufacturers of the technological and market potential of their innovations. Using a comparative case study design in the high-tech field of medical equipment technology, we find that individual...... lead users as surgeons launch entrepreneurial activities and bridge periods in which established medical equipment manufacturers would not risk investing in radical innovations. By doing so, lead users create the conditions usually provided in manufacturer-initiated lead user projects, including...... the supply of diversified knowledge, the development and coordination of a network for further development of the innovation, and initial tests of technical or market feasibility. Our findings have implications for manufacturing firms that wish to design radical innovation projects with (individual) lead...

  6. Alteraciones cromosómicas en Leucemias mieloides agudas, un estudio de nueve años en 312 pacientes, implicaciones en el diagnóstico, pronóstico, tratamiento y seguimiento de la enfermedad

    Directory of Open Access Journals (Sweden)

    Cárdenas Y.

    2001-06-01

    Full Text Available Definir el tipo, frecuencia y distribución de las alteraciones cromosómicas presentes en una población colombiana con diagnóstico de leucemia mieloide aguda. Determinar su asociación con las características clinicopatológicas y analizar su impacto sobre la sobrevida de los pacientes.

  7. Alteraciones cromosómicas en leucemias mieloides agudas, un estudio de nueve años en 312 pacientes, implicaciones en el diagnóstico, pronóstico, tratamiento y seguimiento de la enfermedad

    OpenAIRE

    Cárdenas Y.; García L.; Guevara G.; Medina V.

    2011-01-01

    Definir el tipo, frecuencia y distribución de las alteraciones cromosómicas presentes en una población colombiana con diagnóstico de leucemia mieloide aguda. Determinar su asociación con las características clinicopatológicas y analizar su impacto sobre la sobrevida de los pacientes.

  8. Uso de iodóforo tópico em feridas agudas Uso del yodo tópico y/o compuestos en heridas agudas Use of topic iodine in acute wounds

    Directory of Open Access Journals (Sweden)

    Alcicléa dos Santos Oliveira

    2008-03-01

    Full Text Available Esta pesquisa objetivou realizar revisão sistemática da literatura relacionada ao uso de iodóforos tópicos no tratamento de feridas agudas. Os ensaios clínicos foram localizados por meio da Base de Dados Cochrane, utilizando-se os seguintes descritores: iodine, acute wound, treatment, healing, infection, surgery, surgical. Vinte (52,6%, dentre 38 artigos, enquadraramse nos critérios de inclusão, sendo analisados quanto às características dos periódicos e dos estudos e classificados em: iodóforo versus outros agentes tópicos (4/ 20%; iodóforo versus coberturas (1/ 5%; iodóforo versus soro fisiológico (5/ 25%; iodóforo versus sem iodóforo (8/ 40% e iodóforos em diferentes concentrações (2/ 10%. Resultados favoráveis para os iodóforos ocorreram em 45% dos artigos. Quanto às tendências dos resultados, três dentre cinco artigos mostraram-se favoráveis para a cicatrização de feridas e prevenção de infecção e nove dentre 15 artigos foram desfavoráveis ao uso de iodóforos tópicos quando somente a prevenção de infecção foi investigada.En esta investigación se tuvo como objetivo realizar una revisión sistemática de la literatura respecto a la utilización del yodo tópico y/o compuestos en el tratamiento de las heridas agudas. Los ensayos clínicos fueron localizados por medio de la Base de Datos Cochrane, utilizándose los siguientes descriptores: iodine, acute wound, treatment, healing, infection, surgery, surgical. Veinte (52,6%, de 38 artículos, se encuadraron en los criterios de inclusión, siendo analizados en cuanto a las características de los periódicos y de los estudios y clasificados en: yodo versus otros agentes tópicos (4/ 20%; yodo versus apósitos (1/ 5%; yodo versus solución fisiológica (5/ 25%; yodo versus sin yodo (8/ 40% y yodo en diferentes concentraciones (2/ 10%. Resultados favorables para el yodo se obtuvieron en el 45% de los artículos. En cuanto a las tendencias de los resultados

  9. Determinación de Proteína C Reactiva como predictor de severidad en Pancreatitis Aguda.

    Directory of Open Access Journals (Sweden)

    Pablo Betancour M.

    2009-12-01

    Full Text Available INTRODUCCION: La proteína C reactiva (PCR es un examen simple y de bajo costo que según la literatura tiene buena asociación para la evaluación pronóstica en Pancreatitis Aguda (PA. OBJETIVO: Determinar valor pronóstico de PCR para severidad, presencia de complicaciones y mortalidad intrahospitalaria de PA. MATERIAL Y METODO: Estudio de cohorte retrospectiva de pacientes adultos ingresados al Hospital Dr. Gustavo Fricke, Viña del Mar durante el año 2007. Se identificaron características generales, etiología, score de Balthazar, PCR, complicaciones y mortalidad. Se utilizó test de Mann Whitney para comparación de medianas y curvas ROC. RESULTADOS: Se incluyeron 59 pacientes, siendo el 54,23% hombres. La mediana de edad fue 51 años. La etiología biliar se observó en 57,62%. La mediana de hospitalización fueron 12 días. El 40,67% presentó complicaciones, siendo más frecuente la necrosis pancreática (20,33%. El nivel de PCR mostró diferencias significativas entre pacientes con y sin gravedad imagenológica (33,5mg/dL vs 15,9mg/dL, p=0,0009, complicaciones intrahospitalarias (40mg/dL vs 15,9mg/dL, p<0,0001 y mortalidad intrahospitalaria (66mg/dL vs 22mg/dL, p=0,0061. El área bajo la curva ROC fue de 0,75; 0,84 y 0,91 respectivamente, todos estadísticamente significativos. La sensibilidad, especificidad, likelihood ratio (LR positivo, LR negativo para gravedad imagenológica con un punto de corte de 13,14mg/dL fue 88%, 54%, 1,83 y 0,28 respectivamente. Para predecir mortalidad con un valor de 32,76mg/dL, estos fueron 100%, 71%, 3,43 y 0 respectivamente. DISCUSION. Un valor de PCR de 40mg/dL es buen marcador pronóstico de complicaciones intrahospitalarias. Niveles aumentados tienen alta sensibilidad para predecir gravedad imagenológica y mortalidad intrahospitalaria.

  10. O escore de risco de sangramento como preditor de mortalidade em pacientes com síndromes coronarianas agudas

    Directory of Open Access Journals (Sweden)

    José Carlos Nicolau

    2013-12-01

    Full Text Available FUNDAMENTO: A ocorrência de sangramento aumenta a mortalidade intra-hospitalar em pacientes com síndromes coronarianas agudas (SCAs, e há uma boa correlação entre os escores de risco de sangramento e a incidência de eventos hemorrágicos. No entanto, o papel dos escores de risco de sangramento como fatores preditivos de mortalidade é pouco estudado. OBJETIVO: Analisar o papel do escore de risco de sangramento como fator preditivo de mortalidade intra-hospitalar numa coorte de pacientes com SCA tratados num centro terciário de cardiologia. MÉTODOS: Dos 1.655 pacientes com SCA (547 com SCA com supra de ST e 1.118 com SCA sem supra de ST, calculou-se o escore de risco de sangramento ACUITY/HORIZONS prospectivamente em 249 pacientes e retrospectivamente nos demais 1.416. Informações sobre mortalidade e complicações hemorrágicas também foram obtidas. RESULTADOS: A idade média da população estudada foi 64,3 ± 12,6 anos e o escore de risco de sangramento médio foi 18 ± 7,7. A correlação entre sangramento e mortalidade foi altamente significativa (p < 0,001; OR = 5,29, assim como a correlação entre escore de sangramento e hemorragia intra-hospitalar (p < 0,001; OR = 1,058, e entre escore de sangramento e mortalidade intra-hospitalar (OR ajustado = 1,121, p < 0,001, área sob a curva ROC 0,753; p < 0,001. O OR ajustado e a área sob a curva ROC para a população com SCA com supra de ST foram 1,046 (p = 0,046 e 0,686 ± 0,040 (p < 0,001, respectivamente, e para SCA sem supra de ST foram 1,150 (p < 0,001 e 0,769 ± 0,036 (p < 0,001, respectivamente. CONCLUSÃO: O escore de risco de sangramento é um fator preditivo muito útil e altamente confiável para mortalidade intra-hospitalar em uma grande variedade de pacientes com SCAs, especialmente aqueles com angina instável ou infarto agudo do miocárdio sem supra de ST.

  11. Adiponectina sérica e risco cardiometabólico em pacientes com síndromes coronarianas agudas

    Directory of Open Access Journals (Sweden)

    Gustavo Bernardes de Figueiredo Oliveira

    2013-11-01

    Full Text Available FUNDAMENTO: O tecido adiposo representa não somente uma fonte de energia estocável, mas principalmente um órgão endócrino que secreta várias citoquinas. A adiponectina, uma nova proteína semelhante ao colágeno, foi descoberta como uma citoquina específica do adipócito e um promissor marcador de risco cardiovascular. OBJETIVO: Avaliar a associação entre os níveis séricos da adiponectina e o risco para a ocorrência de eventos cardiovasculares, em pacientes com síndromes coronarianas agudas (SCA, e as correlações entre adiponectina e os biomarcadores metabólicos, inflamatórios e miocárdicos. MÉTODOS: Foram recrutados 114 pacientes com SCA, com seguimento médio de 1,13 ano para avaliação de desfechos clínicos. Modelos de regressão de risco proporcional de Cox com penalização de Firth foram construídos para determinar a associação independente entre adiponectina e o risco subsequente dos desfechos primário (composto de óbito cardiovascular/IAM não fatal/AVE não fatal e coprimário (composto de óbito cardiovascular/ IAM não fatal/AVE não fatal/re-hospitalização requerendo revascularização. RESULTADOS: Houve correlações diretas e significantes entre adiponectina e idade, HDL-colesterol e BNP, e inversas e significantes entre adiponectina e circunferência abdominal, peso corporal, índice de massa corporal, índice HOMA, triglicerídeos e insulina. A adiponectina foi associada a maior risco para os desfechos primário e coprimário (HR ajustado 1,08 e 1,07/incremento de 1.000, respectivamente, p = 0,01 e p = 0,02. CONCLUSÃO: Em pacientes com SCA, a adiponectina sérica foi preditor de risco independente para eventos cardiovasculares. De modo adicional às correlações antropométricas e metabólicas, a adiponectina mostrou correlação significante com BNP.

  12. Intoxicaciones agudas en Santiago de Compostela,en un período de cuatro años

    Directory of Open Access Journals (Sweden)

    P. Fernández

    2003-01-01

    Full Text Available El objetivo de este trabajo fue evaluar las caracterís-ticas de un grupo de pacientes intoxicados en el área sanitaria deSantiago de Compostela. Para ello, se estudiaron 1192 intoxica-ciones agudas atendidas en el Servicio de Urgencias y Unidadde Cuidados Intensivos del Hospital Clínico Universitario deesta ciudad, desde el 1 de enero de 1993 al 31 de diciembre de1996. Se han considerado solo aquellos casos en los que se soli-citó un análisis toxicológico a este Instituto de Medicina Legal,desconociéndose el número de casos excluidos. Se diseñó unaficha clínica con todos los parámetros estudiados para su cum-plimentación por los médicos en el momento del ingreso. Seobservó un predominio del sexo masculino (61,4% y una edadmedia, en la población estudiada, de 32,3±12,5 años (rango: 15-93 años. Los tóxicos más frecuentemente implicados fueron lasdrogas de abuso (681 casos, seguidas de los fármacos (545casos y de “otros agentes” (88 casos. Las intoxicaciones vo-luntarias estaban asociadas mayoritariamente con mujeres y coningesta de fármacos, en contra de las accidentales, asociadas conhombres y con consumo de drogas de abuso. Existen anteceden-tes psiquiátricos en 332 casos, tratamiento farmacológico previoen 219 casos, alcoholismo en 189 casos y drogadicción por víaparenteral en 144 casos. Se ha constatado que un 76% de lospacientes presentaban alguna clínica al ingreso, con un predo-minio de las manifestaciones neurológicas (682 casos. Se utili-zó algún tipo de tratamiento específico en 574 sujetos, desta-cando la aplicación de lavado gástrico (444 casos y la adminis-tración de antídotos (358 casos. La mayoría de los pacientesevolucionó satisfactoriamente, con solo un 2% de mortalidad.Esta información permite conocer los patrones de abuso y la efi-cacia del tratamiento aplicado con el fin de mejorar el controldel paciente intoxicado

  13. Custo-efetividade de fondaparinux em pacientes com Síndrome Coronariana Aguda sem supradesnivelamento do ST

    Directory of Open Access Journals (Sweden)

    Camila Pepe

    2012-07-01

    Full Text Available FUNDAMENTO: O uso combinado de agentes antitrombínicos, antiplaquetários e estratégias invasivas na síndrome coronariana aguda sem supradesnivelamento do ST (SCAsSST reduz eventos cardiovasculares. O fondaparinux demonstrou equivalência à enoxaparina na redução de eventos cardiovasculares, porém com menor índice de sangramento nos pacientes que usaram fondaparinux. OBJETIVO: Avaliar o custo-efetividade de fondaparinux versus enoxaparina em pacientes com SCAsSST no Brasil a partir da perspectiva econômica do Sistema Único de Saúde (SUS. MÉTODOS: Um modelo de decisão analítico foi construído para calcular os custos e consequências resultantes dos tratamentos comparados. Os parâmetros do modelo foram obtidos do estudo OASIS-5 (N = 20.078 pacientes com SCAsSST randomizados para fondaparinux ou enoxaparina. O desfecho avaliado foi um composto de eventos cardiovasculares (isto é, morte, infarto agudo do miocárdio, isquemia refratária e sangramentos graves nos dias 9, 30 e 180 pós-SCAsSST. Foram avaliados todos os custos diretos de tratamento e eventos relacionados à SCAsSST. O ano da análise foi 2010 e os custos foram descritos em reais (R$. RESULTADOS: No dia 9, o custo de tratamento por paciente foi R$ 2.768 para fondaparinux e R$ 2.852 para enoxaparina. Aproximadamente 80% do custo total foram associados a tratamentos invasivos. Os custos com medicamentos representaram 10% do custo total. As taxas combinadas de eventos cardiovasculares e de sangramentos maiores foram 7,3% e 9,0% para fondaparinux e enoxaparina, respectivamente. Análises de sensibilidade confirmaram os resultados iniciais do modelo. CONCLUSÃO: O fondaparinux para tratamento de pacientes com SCAsSST é superior à enoxaparina em termos de prevenção de novos eventos cardiovasculares com menor custo. (Arq Bras Cardiol. 2012; [online].ahead print, PP.0-0

  14. ENFOQUE DEL PACIENTE CON INTOXICACIÓN AGUDA POR PLAGUICIDAS ORGANOS FOSFORADOS Organophosphorates: acute intoxication practical issues

    Directory of Open Access Journals (Sweden)

    Carlos Mauricio Hurtado Clavijo

    2005-10-01

    Full Text Available Un gran número de insecticidas organofosforados se usan en todo el mundo a diario. Las intoxicaciones ocurren generalmente de forma accidental por exposición laboral, o intencional, con fines suicidas. Los organofosforados producen sus efectos tóxicos a través de la inhibición de la acetilcolinesterasa, la enzima responsable de la hidrólisis del neurotransmisor acetilcolina, produciendo ácido acético y colina, productos químicamente inertes. La unión entre los organofosforados y la acetilcolina es una unión irreversible espontáneamente, sin embargo, puede ser reversible con el uso de antídotos específico llamados oximas. La administración temprana de pralidoxima es crucial y muy útil si se inicia en las primeras seis horas luego de la intoxicación aguda. La atropina produce un beneficio clínico dramático para los síntomas muscarínicos del síndrome colinérgico. Pueden ocurrir complicaciones importantes en los pacientes por intoxicación con organofosforados, como hipotensión, arritmias cardíacas fatales, síndrome intermedio, distres respiratorio, neumonía y aún disfunción cerebral severa.Every day more organic phosphorus insecticides, are used in the entire world. Intoxications happen generally accidentally for exhibition work, or intentional as suicides. Organic phosphorus compounds, produces toxic effects, through the inhibition of the acetylcholinesterase, the enzyme responsible for the hydrolisys of the acetylcholine, neurotransmisor producing acetic acid and colina, chemically inert products. The binding between the organic phosphorus compounds and the acetylcholine is spontaneously and irreversible, however, it can be reversible with the use of an antidote specific called oximas. The early administration of pralidoxima is crucial, great benefits are obtained if it begins in the first six hours after the acute intoxication. Atropine produces a dramatic clinical benefit for the symptoms muscarinic of the syndrome

  15. Consenso intersociedades para el manejo de infecciones respiratorias: bronquitis aguda y enfermedad pulmonar obstructiva crónica

    Directory of Open Access Journals (Sweden)

    Gustavo Lopardo

    2013-04-01

    Full Text Available La Sociedad Argentina de Infectología convocó a otras sociedades científicas para elaborar una guía práctica y actualizada para el manejo del tratamiento antibiótico de las bronquitis agudas (BA y los episodios de reagudización de enfermedad pulmonar obstructiva crónica (EPOC, con el objetivo de promover el uso racional de los recursos diagnósticos y terapéuticos. La BA se caracteriza por la inflamación del árbol bronquial que afecta tanto a adultos como a niños sin enfermedades pulmonares crónicas, siendo de origen viral en la mayoría de los casos. El diagnóstico es clínico, debiéndose diferenciar de los episodios de neumonía adquirida en la comunidad. El tratamiento de los episodios de BA es fundamentalmente sintomático. En huéspedes inmunocomprometidos, con enfermedades crónicas respiratorias o cardíacas y en adultos mayores con comorbilidades debe evaluarse el requerimiento de tratamiento antibiótico caso por caso. Se define como exacerbación de la EPOC al cambio agudo en la situación clínica basal del paciente más allá de la variabilidad diaria, que cursa con aumento de la disnea, aumento de la expectoración, expectoración purulenta, o cualquier combinación de estos tres síntomas, y que precisa un cambio terapéutico. La presencia de uno de estos síntomas se define como episodio leve, dos como moderado y tres como grave. En un 50 a 75% de las exacerbaciones de EPOC se aísla en el esputo un agente infeccioso. En los episodios moderados y graves debe iniciarse tratamiento antibiótico. Amoxicilina-inhibidor de betalactamasas, macrólidos y fluoroquinolonas se encuentran entre las opciones terapéuticas.

  16. Disección aórtica aguda: serie cronológica (1987-2007.

    Directory of Open Access Journals (Sweden)

    Ángel Julio Romero Cabrera

    2011-08-01

    Full Text Available Fundamento: La disección aórtica es una emergencia médica, no tan infrecuente como se acostumbra suponer, aunque sí a menudo no diagnosticada. Objetivo: Analizar las características clínico patológicas de los fallecidos por disección aórtica aguda. Métodos: Se realizó un estudio descriptivo, analítico, de serie de casos (61 pacientes durante los años 1987-2007 en el Hospital Universitario “Dr. Gustavo Aldereguía Lima” de Cienfuegos. Las variables del estudio fueron: edad, sexo, raza, antecedentes patológicos personales de hipertensión arterial, clasificación de la disección, presencia o no de hipertrofia ventricular izquierda, síntoma principal de presentación, diagnóstico clínico al ingreso, y la presencia o no de rotura de la disección. Asimismo, se determinó la tendencia de la mortalidad hospitalaria por dicha entidad. Resultados: Predominaron los pacientes ancianos, del sexo masculino y raza blanca con antecedentes de hipertensión arterial. Se comprobó una alta frecuencia de hipertrofia ventricular izquierda. Los síntomas de presentación más frecuentes fueron el dolor torácico, la toma de conciencia, la disnea y el dolor abdominal. La mortalidad aunque con oscilaciones presentó una tendencia al aumento en la serie cronológica estudiada. Conclusiones: El cuadro clínico, con síntomas de presentación disímiles, provoca que el diagnóstico inicial de disección no se tome en cuenta. El control de factores de riesgo cardiovascular en la comunidad debe ser la piedra angular para la prevención de este trastorno potencialmente mortal.

  17. Free Radicals in Adolescent Varicocele Testis

    OpenAIRE

    Carmelo Romeo; Giuseppe Santoro

    2014-01-01

    We examine the relationship between the structure and function of the testis and the oxidative and nitrosative stress, determined by an excessive production of free radicals and/or decreased availability of antioxidant defenses, which occur in the testis of adolescents affected by varicocele. Moreover, the effects of surgical treatment on oxidative stress were provided. We conducted a PubMed and Medline search between 1980 and 2014 using “adolescent,” “varicocele,” “free radicals,” “oxidative...

  18. Photodynamically generated bovine serum albumin radicals

    DEFF Research Database (Denmark)

    Silvester, J A; Timmins, G S; Davies, Michael Jonathan

    1998-01-01

    Porphyrin-sensitized photoxidation of bovine serum albumin (BSA) results in oxidation of the protein at (at least) two different, specific sites: the Cys-34 residue giving rise to a thiyl radical (RS.); and one or both of the tryptophan residues (Trp-134 and Trp-214) resulting in the formation...... of tertiary carbon-centred radicals and disruption of the tryptophan ring system. In the case of porphyrins such as hematoporphyrin, which bind at specific sites on BSA, these species appear to arise via long-range transfer of damage within the protein structure, as the binding site is some distance from...

  19. Resonance ionization detection of combustion radicals

    Energy Technology Data Exchange (ETDEWEB)

    Cool, T.A. [Cornell Univ., Ithaca, NY (United States)

    1993-12-01

    Fundamental research on the combustion of halogenated organic compounds with emphasis on reaction pathways leading to the formation of chlorinated aromatic compounds and the development of continuous emission monitoring methods will assist in DOE efforts in the management and disposal of hazardous chemical wastes. Selective laser ionization techniques are used in this laboratory for the measurement of concentration profiles of radical intermediates in the combustion of chlorinated hydrocarbon flames. A new ultrasensitive detection technique, made possible with the advent of tunable VUV laser sources, enables the selective near-threshold photoionization of all radical intermediates in premixed hydrocarbon and chlorinated hydrocarbon flames.

  20. Radical Islamism and Migrant Integration in Denmark

    DEFF Research Database (Denmark)

    Goli, Marco; Rezaei, Shahamak

    2011-01-01

    It has been suggested that alienation and failed integration may be causes of “Homegrown Radical Islamism” in Western societies. Western countries often expect that migrants and their descendants residing there as citizens will embrace or support common democratic ideals as a predicate for – or c......It has been suggested that alienation and failed integration may be causes of “Homegrown Radical Islamism” in Western societies. Western countries often expect that migrants and their descendants residing there as citizens will embrace or support common democratic ideals as a predicate...

  1. Elementary reaction allyl radical with oxygen

    Institute of Scientific and Technical Information of China (English)

    DONG Feng; KONG Fanao

    2003-01-01

    The elementary reaction between allyl radical with oxygen molecule wasexperimentally investigated. The allyl radical was produced via laser photolysis of C3H5Br in gaseous phase. Nascent vibrational excited products HCO, CO2, CH3CHO and HCOOH were recorded by the time- resolved Fourier transform infrared spectroscopy. The product channels of C2H5+CO2, CH3CHO+HCO, and HCOOH + C2H3 have been identified. The vibrational populations of product CO2 are obtained by spectral simulation. A mechanism forming a series of three-membered ring-struc- ture intermediates is suggested.

  2. Glutathione--hydroxyl radical interaction: a theoretical study on radical recognition process.

    Directory of Open Access Journals (Sweden)

    Béla Fiser

    Full Text Available Non-reactive, comparative (2 × 1.2 μs molecular dynamics simulations were carried out to characterize the interactions between glutathione (GSH, host molecule and hydroxyl radical (OH(•, guest molecule. From this analysis, two distinct steps were identified in the recognition process of hydroxyl radical by glutathione: catching and steering, based on the interactions between the host-guest molecules. Over 78% of all interactions are related to the catching mechanism via complex formation between anionic carboxyl groups and the OH radical, hence both terminal residues of GSH serve as recognition sites. The glycine residue has an additional role in the recognition of OH radical, namely the steering. The flexibility of the Gly residue enables the formation of further interactions of other parts of glutathione (e.g. thiol, α- and β-carbons with the lone electron pair of the hydroxyl radical. Moreover, quantum chemical calculations were carried out on selected GSH/OH(• complexes and on appropriate GSH conformers to describe the energy profile of the recognition process. The relative enthalpy and the free energy changes of the radical recognition of the strongest complexes varied from -42.4 to -27.8 kJ/mol and from -21.3 to 9.8 kJ/mol, respectively. These complexes, containing two or more intermolecular interactions, would be the starting configurations for the hydrogen atom migration to quench the hydroxyl radical via different reaction channels.

  3. Incidencia de insuficiencia renal aguda en niños hospitalizados por quemaduras en el Hospital Universitario San Vicente de Paúl de Medellín, 2007-2008

    Directory of Open Access Journals (Sweden)

    José William Cornejo Ochoa

    2008-11-01

    Full Text Available INTRODUCCIÓN: las quemaduras en niños se han identificado como causa principal de trauma y su asociación con insuficiencia renal aguda es una de las complicaciones más temidas debido a su alta tasa de mortalidad. OBJETIVO: establecer la incidencia de insuficiencia renal aguda y describir algunos de los factores asociados en niños quemados menores de 18 años atendidos en el Hospital Universitario San Vicente de Paúl de Medellín. MATERIALES Y MÉTODOS: estudio de cohorte prospectivo y descriptivo en pacientes menores de 18 años con quemaduras superiores al 30% de la superficie corporal total que ingresaron al Servicio de quemados del Hospital Universitario San Vicente de Paúl entre abril del 2007 y febrero 2008. RESULTADOS: en total se incluyeron 25 pacientes en el estudio y de acuerdo con los criterios utilizados el 64% desarrollaron insuficiencia renal aguda y presentaron una tasa de mortalidad del 12,5% mientras que en el grupo sin insuficiencia renal aguda no se presentaron muertes. No se encontraron diferencias significativas entre los dos grupos en ninguna de las variables, lo que podría deberse al tamaño de la muestra; sin embargo, la lesión por inhalación se vislumbra como un factor importante de riesgo. CONCLUSIONES: la insuficiencia renal aguda en pacientes quemados es una complicación muy frecuente y se la debe buscar activamente y hacerles un seguimiento estrecho a los pacientes. Hacen falta más estudios en Medellín para determinar los factores de riesgo asociados a esta complicación.

  4. Discourses of postmodern epistemology: Radical impetus lost?

    OpenAIRE

    Mueller, Martin

    2006-01-01

    Exhibiting a highly divisive agenda postmodernism has created profound chasms across scientific communities. In development studies its radical impetus has translated into the postdevelopment perspective which violently repudiates the modernist development project. This paper crystallises two distinct discourses of working upon the epistemological raw material of postmodernism: an exclusivist discourse, which reinforces the chasm by isolating postmodernism, and an inclusivist discourse, which...

  5. Identity and Islamic Radicalization in Western Europe

    NARCIS (Netherlands)

    S.M. Murshed (Syed); S. Pavan (Sara)

    2009-01-01

    textabstractThis paper argues that both socio-economic disadvantage and political factors, such as the West’s foreign policy with regard to the Muslim world, along with historical grievances, play a part in the development of Islamic radicalized collective action in Western Europe. We emphasise the

  6. Radical Negativity: Music Education for Social Justice

    Science.gov (United States)

    McLaren, Peter

    2011-01-01

    According to Hedges (2010), the real enemies of the liberal class are radical thinkers such as Noam Chomsky and Ralph Nader, iconoclastic intellectuals who possess the moral autonomy to defy the power elite. While this author agrees with Hedges, he would take this argument even further. In this article, the author argues that the real enemy of…

  7. Neglected Side Effects After Radical Prostatectomy

    DEFF Research Database (Denmark)

    Frey, Anders Ullmann; Sønksen, Jens; Fode, Mikkel

    2014-01-01

    INTRODUCTION: A series of previously neglected sexually related side effects to radical prostatectomy (RP) has been identified over the recent years. These include orgasm-associated incontinence (OAI), urinary incontinence in relation to sexual stimulation (UISS), altered perception of orgasm, or...

  8. Radical recombinations in acetylene-air flames

    NARCIS (Netherlands)

    Zeegers, P.J.Th.; Alkemade, C.T.J.

    1965-01-01

    In this paper an analysis is given of the behaviour of excess radical concentrations, H, OH and O as a function of height above the reaction zone in premixed acetylene-air flames at 2–200° to 2400°K and 1 atmosphere pressure. The intensity was measured of the Li resonance line which is related to th

  9. Designed metalloprotein stabilizes a semiquinone radical.

    Science.gov (United States)

    Ulas, Gözde; Lemmin, Thomas; Wu, Yibing; Gassner, George T; DeGrado, William F

    2016-04-01

    Enzymes use binding energy to stabilize their substrates in high-energy states that are otherwise inaccessible at ambient temperature. Here we show that a de novo designed Zn(II) metalloprotein stabilizes a chemically reactive organic radical that is otherwise unstable in aqueous media. The protein binds tightly to and stabilizes the radical semiquinone form of 3,5-di-tert-butylcatechol. Solution NMR spectroscopy in conjunction with molecular dynamics simulations show that the substrate binds in the active site pocket where it is stabilized by metal-ligand interactions as well as by burial of its hydrophobic groups. Spectrochemical redox titrations show that the protein stabilized the semiquinone by reducing the electrochemical midpoint potential for its formation via the one-electron oxidation of the catechol by approximately 400 mV (9 kcal mol(-1)). Therefore, the inherent chemical properties of the radical were changed drastically by harnessing its binding energy to the metalloprotein. This model sets the basis for designed enzymes with radical cofactors to tackle challenging chemistry. PMID:27001731

  10. Designed metalloprotein stabilizes a semiquinone radical

    Science.gov (United States)

    Ulas, Gözde; Lemmin, Thomas; Wu, Yibing; Gassner, George T.; Degrado, William F.

    2016-04-01

    Enzymes use binding energy to stabilize their substrates in high-energy states that are otherwise inaccessible at ambient temperature. Here we show that a de novo designed Zn(II) metalloprotein stabilizes a chemically reactive organic radical that is otherwise unstable in aqueous media. The protein binds tightly to and stabilizes the radical semiquinone form of 3,5-di-tert-butylcatechol. Solution NMR spectroscopy in conjunction with molecular dynamics simulations show that the substrate binds in the active site pocket where it is stabilized by metal-ligand interactions as well as by burial of its hydrophobic groups. Spectrochemical redox titrations show that the protein stabilized the semiquinone by reducing the electrochemical midpoint potential for its formation via the one-electron oxidation of the catechol by approximately 400 mV (9 kcal mol-1). Therefore, the inherent chemical properties of the radical were changed drastically by harnessing its binding energy to the metalloprotein. This model sets the basis for designed enzymes with radical cofactors to tackle challenging chemistry.

  11. Ultraviolet photodissociation dynamics of the phenyl radical

    International Nuclear Information System (INIS)

    Ultraviolet (UV) photodissociation dynamics of jet-cooled phenyl radicals (C6H5 and C6D5) are studied in the photolysis wavelength region of 215-268 nm using high-n Rydberg atom time-of-flight and resonance enhanced multiphoton ionization techniques. The phenyl radicals are produced from 193-nm photolysis of chlorobenzene and bromobenzene precursors. The H-atom photofragment yield spectra have a broad peak centered around 235 nm and are in good agreement with the UV absorption spectra of phenyl. The H + C6H4 product translational energy distributions, P(ET)'s, peak near ∼7 kcal/mol, and the fraction of average translational energy in the total excess energy, T>, is in the range of 0.20-0.35 from 215 to 268 nm. The H-atom product angular distribution is isotropic. The dissociation rates are in the range of 107-108 s-1 with internal energy from 30 to 46 kcal/mol above the threshold of the lowest energy channel H +o-C6H4 (ortho-benzyne), comparable with the rates from the Rice-Ramsperger-Kassel-Marcus theory. The results from the fully deuterated phenyl radical are identical. The dissociation mechanism is consistent with production of H +o-C6H4, as the main channel from unimolecular decomposition of the ground electronic state phenyl radical following internal conversion of the electronically excited state.

  12. Support for radical left ideologies in Europe

    NARCIS (Netherlands)

    Visser, Mark; Lubbers, Marcel; Kraaykamp, Gerbert; Jaspers, Eva

    2014-01-01

    This article examines support for radical left ideologies in 32 European countries. It thus extends the relatively scant empirical research available in this field. The hypotheses tested are derived mainly from group-interest theory. Data are deployed from the 2002-2010 European Social Surveys (N=17

  13. Radical Change: Digital Age Literature and Learning.

    Science.gov (United States)

    Dresang, Eliza T.; McClelland, Kathryn

    1999-01-01

    Describes the concept of radical change, a theoretical construct that identifies and explains books with characteristics reflecting the types of interactivity, connectivity, and access that permeate the emerging digital society. Highlights innovative ways that authors, illustrators, and designers incorporate these features into books for…

  14. User involvement competence for radical innovation

    DEFF Research Database (Denmark)

    Lettl, Christopher

    2007-01-01

    focuses on the involvement of such users that are in the position to play an active role as inventors and (co)-developers. A multiple case study analysis was conducted in the field of medical technology. Five radical innovation projects within four firms were selected including medical robots and computer...

  15. Radical Welfare State Retrenchment: A Comparative Analysis

    DEFF Research Database (Denmark)

    Starke, Peter

    as electoral suicide, but this changed in the 1980s when Margaret Thatcher's government began a series of cutbacks in the UK. During the 1990s, the New Zealand government announced the most radical social benefit cutbacks the country had ever seen. Examining these cases in detail, and contrasting them...

  16. Pancreatite aguda leve: avaliação pela ultra-sonografia. estudo prospectivo Mild acute pancreatitis: ultrasound evaluation: a prospective study

    Directory of Open Access Journals (Sweden)

    Márcio Martins Machado

    2002-07-01

    Full Text Available Resumo Neste estudo foram avaliados, por meio da ultra-sonografia, 21 pacientes com pancreatite aguda leve. Foram analisadas a presença ou ausência de hipoecogenicidade do pâncreas e a presença ou ausência de líquido peripancreático. Em 19 pacientes (90,5% foi identificada hipoecogenicidade pancreática, e em três (15,8% destes pacientes foi identificada a presença de pequena quantidade de líquido na pequena cavidade dos epíploons. Em dois pacientes (9,5% não se identificou qualquer alteração pancreática. Com relação à possível etiologia da pancreatite aguda, em 15 pacientes (71,5% pôde-se demonstrar a presença de colecistopatia calculosa, em quatro pacientes (19,0% havia história de alcoolismo crônico e não foram identificados cálculos na vesícula biliar, e em dois pacientes (9,5% não foi identificada qualquer causa aparente. Os autores concluem que a ultra-sonografia pode identificar alteração na maioria dos pacientes com pancreatite aguda leve e permite, ainda, o acompanhamento daqueles com pequenas coleções líquidas peripancreáticas.We analyzed the ultrasonographic findings of 21 patients with mild acute pancreatitis. The presence or absence of pancreatic hypoechogenicity and peripancreatic fluid collection was assessed. Pancreatic hypoechogenicity was identified in 19 patients (90.5% whereas small sac fluid collection was identified in 3 (15.8% of these patients. No abnormality was seen in 2 patients (9.5%. Regarding the etiology of acute pancreatitis, cholelithiasis was identified in 15 patients (71.5%, alcohol abuse was identified in 4 patients (19.0%, and in 2 patients (9.5% no probable etiology could be found. The authors conclude that ultrasonography may identify abnormalities in the majority of patients with mild acute pancreatitis and can be used to assess patients with peripancreatic fluid collections.

  17. Pancreatitis aguda secundaria a hipertrigliceridemia: presentación de dos casos clínicos Acute pancreatitis secondary to hypertriglyceridemia: A report of two cases

    Directory of Open Access Journals (Sweden)

    S. J. Jiménez Forero

    2008-06-01

    Full Text Available La pancreatitis aguda es un proceso inflamatorio reversible. La hipertrigliceridemia como etiología de la pancreatitis aguda varía entre un 1,3 y un 11%, de acuerdo a la literatura, cuando los niveles de triglicéridos alcanzan valores por encima de 1.000 mg/dl; sin embargo, la hipertrigliceridemia se observa en un 12 a un 39% de las pancreatitis agudas como factor asociado. El objetivo del tratamiento médico es aumentar la actividad de la lipoproteinlipasa y aumentar la degradación de los quilomicrones; disminuyendo así los valores plasmáticos de triglicéridos a niveles menores de 500 mg/dl, incluso a menos de 200 mg/dl si es posible con diferentes estrategias, entre ellas la insulina. En el presente artículo, presentamos dos casos clínicos de pancreatitis severas inducidas por hipertrigliceridemia, manejadas con terapia de infusión de insulina con adecuada respuesta clínica y paraclínica con disminución significativa de los niveles de triglicéridos, 48 horas postratamiento.Acute pancreatitis is a reversible inflammatory process. Hypertriglyceridemia as a cause of acute pancreatitis reaches frequencies of 1.3-11% according to the literature when triglyceride levels reach values over 1,000 mg/dl; nevertheless hypertriglyceridemia is observed in 12-39% of acute pancreatitis cases as an associated factor. The objective of medical treatment is to increase lipoprotein-lipase activity, and to increase chylomicron breakdown thus diminishing serum triglycerides to levels smaller than 500 or even 200 mg/dl (when possible using a variety of strategies including insulin administration. In the present article, we report two cases of severe pancreatitis induced by hypertriglyceridemia that were managed with insulin infusion; both responded adequately, as measured by a significant reduction of triglyceride levels at 48 hours post-treatment.

  18. Manejo da asma aguda em adultos na sala de emergência: evidências atuais Management of acute asthma in adults in the emergency room: current evidence

    Directory of Open Access Journals (Sweden)

    Paulo de Tarso Roth Dalcin

    2009-01-01

    Full Text Available Asma é uma doença com uma alta prevalência em nosso meio e ao redor do mundo. Embora novas opções terapêuticas tenham sido recentemente desenvolvidas, parece haver um aumento mundial na sua morbidade e mortalidade. Em muitas instituições, as exacerbações asmáticas ainda se constituem em uma emergência médica muito comum. As evidências têm demonstrado que o manejo da asma aguda na sala de emergência concentra decisões cruciais que podem determinar o desfecho desta situação clínica. Nesta revisão, enfocaremos a avaliação e o tratamento do paciente com asma aguda na sala de emergência, descrevendo uma estratégia apropriada para o seu manejo. Serão consideradas as seguintes etapas: diagnóstico, avaliação da gravidade, tratamento, avaliação das complicações, decisão sobre onde se realizará o tratamento adicional e orientações por ocasião da alta da emergência. Espera-se que estas recomendações contribuam para que o médico clínico tome as decisões apropriadas durante o manejo da asma aguda na sala de emergência.Asthma is a disease with high prevalence in our country and worldwide. Although new therapeutic approaches have been developed recently, there seems to be a global increase in morbidity and mortality from asthma. In many institutions, asthma exacerbation is still a common medical emergency. Clinical evidence demonstrates that management of acute asthma in the emergency room entails crucial decisions that could determine the clinical outcome. In this review, the authors focus on assessment and treatment of patients with acute asthma and outline an appropriate management strategy. Diagnosis, severity assessment, treatment, complications, decision about where additional treatment will take place and orientations on discharge from the emergency will be considered. It is expected that these recommendations will help physicians to make the appropriate decisions about care of acute asthma in the emergency

  19. Sarcoma granulocítico multicêntrico como recidiva de leucemia mieloide aguda Multicentric granulocytic sarcoma as relapse of acute myelogenous leukemia

    Directory of Open Access Journals (Sweden)

    Taciana G. S. Aguiar

    2009-01-01

    Full Text Available Sarcoma granulocítico (SG é um tumor sólido extramedular, constituído por células precursoras de granulócitos. É geralmente associado a leucemia mieloide aguda ou raramente a outras desordens mieloproliferativas. O tumor geralmente ocorre precedendo uma leucemia mieloide aguda, durante o seu curso ou após a remissão ter sido alcançada. O prognóstico é pobre e tem como principais modalidades terapêuticas a quimioterapia e a radioterapia. Relata- se um caso de SG multicêntrico, de evolução rápida, com acometimento difuso de pele, mamas, gânglios linfáticos, tecido celular subcutâneo e líquor, em mulher de 45 anos, fora de tratamento para leucemia mieloide aguda e em remissão hematológica há 18 meses. A paciente apresentava dor intensa em membro inferior direito há uma semana e estava em anticoagulação oral há seis meses por trombose venosa profunda neste membro. Diagnosticado o SG, a paciente foi tratada com radioterapia e quimioterapia com boa resposta. Após três meses de seguimento, em vigência do tratamento quimioterápico, evoluiu com recidiva do SG neste membro, associado ao acometimento das mamas e posteriormente do sistema nervoso central, evoluindo para óbito em aplasia e sepses.Granulocytic sarcoma is an extramedullary solid tumor consisting of immature granulocytic cells. It is often associated with acute myelogenous leukemia and more rarely with other myeloproliferative disorders. The tumor generally occurs before acute myeloid leukemia, during its course or after disease remission. It has a poor prognosis with the main therapeutic options being chemotherapy and radiotherapy. A multicentric accelerated case of granulocytic sarcoma of a 45- year- old woman with diffuse skin, breast, lymphatic ganglia and subcutaneous tissue presentations no longer undergoing treatment for acute myeloid leukemia and in hematologic remission for 18 months is reported. The patient presented with severe pain of right lower

  20. Incidencia de las leucemias agudas en niños de la ciudad de México, de 1982 a 1991

    Directory of Open Access Journals (Sweden)

    Mejía-Aranguré Juan Manuel

    2000-01-01

    Full Text Available OBJETIVO: Medir la tasa de incidencia de las leucemias agudas (LA en las diferentes delegaciones políticas del Distrito Federal y evaluar si existe una tendencia significativa en dichos padecimientos en tales delegaciones. MATERIAL Y MÉTODOS: Estudio longitudinal descriptivo realizado en seis hospitales de la ciudad de México, los que atienden a cerca de 97.5% de todos los niños con cáncer de esta ciudad. Los datos se capturaron de 1995 a 1996, y se analizaron en 1999, en el Hospital de Pediatría del Centro Médico Nacional Siglo XXI, del Instituto Mexicano del Seguro Social. Para cada delegación se calcularon la tasa de incidencia anual promedio, la tasa estandarizada y la razón estandarizada de morbilidad (REM con intervalos de confianza al 95% (IC 95%. La tendencia se evaluó con la tasa de cambio promedio. RESULTADOS: Se observó una tendencia al incremento en la incidencia de la leucemia aguda linfoblástica (LAL en cinco delegaciones: Alvaro Obregón, Cuauhtémoc, Gustavo A. Madero, Iztacalco y Venustiano Carranza. En la leucemia aguda mieloblástica (LAM no se notificaron cambios estadísticamente significativos en la incidencia en ninguna delegación política. Sólo con LAM se encontró una REM significativa y correspondió a la delegación Alvaro Obregón (REM= 2.91, IC 95% 1.63 - 4.80. Las REM más altas se encontraron en el sur y suroeste de la ciudad. CONCLUSIONES: Sólo se observó incremento en la incidencia de LAL en cinco delegaciones políticas. La incidencia más alta de LAM se encontró en la delegación Alvaro Obregón.

  1. Free Radicals in Superfluid Liquid Helium Nanodroplets: A Pyrolysis Source for the Production of Propargyl Radical

    CERN Document Server

    Küpper, J; Miller, R E; K\\"upper, Jochen; Merritt, Jeremy M.; Miller, Roger E.

    2002-01-01

    An effusive pyrolysis source is described for generating a continuous beam of radicals under conditions appropriate for the helium droplet pick-up method. Rotationally resolved spectra are reported for the $\

  2. THE RADICAL ONLINE: INDIVIDUAL RADICALIZATION PROCESSES AND THE ROLE OF THE INTERNET

    Directory of Open Access Journals (Sweden)

    Daniel Koehler

    2014-12-01

    Full Text Available This paper examines in detail the role of the Internet in individual radicalization processes of eight German former right-wing extremists. Applying Grounded Theory methodology the qualitative interviews were analyzed in several coding and re-coding phases. The findings are integrated into the existing literature afterwards. Besides well known factors, such as more effective communication, anonymity and better networking opportunities, this study found evidence that the Internet is a major driving factor to establish and foster the development of radical contrast societies (cf. Koehler, 2015 transmitting radical and violent ideologies and translating them into political activism. As a venue for information exchange, ideological development and training, the individual radicalization process was characteristically shaped or even made possible through the Internet. This paper also shows the high value of qualitative research regarding the topic in contrast to usually employed quantitative analysis of webpage content.

  3. Monolignol radical-radical coupling networks in western red cedar and Arabidopsis and their evolutionary implications

    Science.gov (United States)

    Kim, Myoung K.; Jeon, Jae-Heung; Davin, Laurence B.; Lewis, Norman G.

    2002-01-01

    The discovery of a nine-member multigene dirigent family involved in control of monolignol radical-radical coupling in the ancient gymnosperm, western red cedar, suggested that a complex multidimensional network had evolved to regulate such processes in vascular plants. Accordingly, in this study, the corresponding promoter regions for each dirigent multigene member were obtained by genome-walking, with Arabidopsis being subsequently transformed to express each promoter fused to the beta-glucuronidase (GUS) reporter gene. It was found that each component gene of the proposed network is apparently differentially expressed in individual tissues, organs and cells at all stages of plant growth and development. The data so obtained thus further support the hypothesis that a sophisticated monolignol radical-radical coupling network exists in plants which has been highly conserved throughout vascular plant evolution.

  4. Charge transfer from 2-aminopurine radical cation and radical anion to nucleobases: A pulse radiolysis study

    Energy Technology Data Exchange (ETDEWEB)

    Manoj, P. [School of Chemical Sciences, Mahatma Gandhi University, Kottayam 686 560, Kerala (India); Mohan, H. [Radiation Chemistry and Chemical Dynamics Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India); Mittal, J.P. [Radiation Chemistry and Chemical Dynamics Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India); Manoj, V.M. [School of Chemical Sciences, Mahatma Gandhi University, Kottayam 686 560, Kerala (India); Aravindakumar, C.T. [School of Chemical Sciences, Mahatma Gandhi University, Kottayam 686 560, Kerala (India)], E-mail: CT-Aravindakumar@rocketmail.com

    2007-01-08

    Pulse radiolysis study has been carried out to investigate the properties of the radical cation of 2-aminopurine (2AP) and the probable charge transfer from the radical cation and radical anion of 2AP to natural nucleobases in aqueous medium. The radical cation of 2AP was produced by the reaction of sulfate radical anion (SO{sub 4}{sup dot-}). The time resolved absorption spectra obtained by the reaction of SO{sub 4}{sup dot-} with 2AP at neutral pH have two distinct maxima at 380 and 470nm and is assigned to the formation of a neutral radical of the form 2AP-N{sup 2}(-H){sup dot} (k{sub 2}=4.7x10{sup 9}dm{sup 3}mol{sup -1}s{sup -1} at pH 7). This neutral radical is formed from the deprotonation reaction of a very short-lived radical cation of 2AP. The transient absorption spectra recorded at pH 10.2 have two distinct maxima at 400 and 480nm and is assigned to the formation of a nitrogen centered radical (2AP-N(9){sup dot}). As the hole transport from 2AP to guanine is a highly probable process, the reaction of SO{sub 4}{sup dot-} is carried out in the presence of guanosine, adenosine and inosine. The spectrum obtained in the presence of guanosine was significantly different from that in the absence and it showed prominent absorption maxima at 380 and 470nm, and a weak broad maximum centered around 625nm which match well with the reported spectrum of a neutral guanine radical (G(-H){sup dot}). The electron transfer reaction from the radical anion of 2AP to thymine (T), cytidine (Cyd) and uridine (Urd) was also investigated at neutral pH. Among the three pyrimidines, only the transient spectrum in the presence of T gave a significant difference from the spectral features of the electron adduct of 2AP, which showed a prominent absorption maximum at 340nm and this spectrum is similar to the electron adduct spectrum of T. The preferential reduction of thymine by 2AP{sup dot-} and the oxidation of guanosine by 2AP{sup dot+} clearly follow the oxidation

  5. Spectroscopy of free radicals and radical containing entrance-channel complexes in superfluid helium nanodroplets

    OpenAIRE

    Küpper, J.; Merritt, J.

    2007-01-01

    The spectroscopy of free radicals and radical containing entrance-channel complexes embedded in superfluid helium nano-droplets is reviewed. The collection of dopants inside individual droplets in the beam represents a micro-canonical ensemble, and as such each droplet may be considered an isolated cryo-reactor. The unique properties of the droplets, namely their low temperature (0.4 K) and fast cooling rates ( ~ 1016 K s-1)provides novel opportunities for the formation and high-resolution st...

  6. Environmentally Persistent Free Radicals (EPFRs) - 2. Are Free Hydroxyl Radicals Generated in Aqueous Solutions?

    OpenAIRE

    Khachatryan, Lavrent; Dellinger, Barry

    2011-01-01

    A chemical spin trap, 5,5-dimethyl-1-pyrroline-N-oxide (DMPO), in conjunction with electron paramagnetic resonance (EPR) spectroscopy was employed to measure the production of hydroxyl radical (.OH) in aqueous suspensions of 5% Cu(II)O/silica (3.9% Cu) particles containing environmentally persistent free radicals (EPFRs) of 2-monochlorophenol (2-MCP). The results indicate: 1) a significant differences in accumulated DMPO-OH adducts between EPFR containing particles and non-EPFR control sample...

  7. Role of oxygen free radicals in patients with acute pancreatitis

    OpenAIRE

    Park, Byung Kyu; Chung, Jae Bock; Lee, Jin Heon; Suh, Jeong Hun; Park, Seung Woo; Song, Si Young; Kim, Hyeyoung; Kim, Kyung Hwan; Kang, Jin Kyung

    2003-01-01

    AIM: The generation of oxygen free radicals has been implicated in the pathogenesis of experimental pancreatitis. The aim of this study was to determine the role of oxygen free radicals in patients with acute pancreatitis.

  8. Self-Assembled Monolayers of a Multifunctional Organic Radical

    NARCIS (Netherlands)

    Crivillers, Núria; Mas-Torrent, Marta; Perruchas, Sandrine; Roques, Nans; Vidal-Gancedo, José; Veciana, Jaume; Rovira, Concepció; Basabe-Desmonts, Lourdes; Ravoo, Bart Jan; Crego-Calama, Mercedes; Reinhoudt, David N.

    2007-01-01

    A radical switch: Covalent and noncovalent interactions have been used to functionalize silicon oxide surfaces with polychlorotriphenylmethyl radicals, which are electroactive and can be reversibly reduced or oxidized to nonmagnetic and nonfluorescent species. Thus, the self-assembled monolayers beh

  9. Impacto económico de la desnutrición crónica, aguda y global en el Perú

    OpenAIRE

    Lorena Alcázar; Diego Ocampo; Lucio Huamán-Espino; Juan Pablo Aparco

    2013-01-01

    Objetivos. Estimar el impacto económico de la desnutrición crónica, aguda y global en el Perú. Materiales y métodos. El presente estudio estimó el impacto económico de la desnutrición infantil en dos horizontes temporales (incidental retrospectiva y prospectiva) para el año 2011, considerando los costos asociados a la desnutrición en salud, educación y productividad para la economía peruana. Se combinó la información proveniente de la Encuesta Demográfica de Salud Familiar, la Encuesta Nacion...

  10. Estudo imunobiológico de estoques de Trypanosoma cruzi isolados de pacientes na fase aguda da doença de Chagas

    Directory of Open Access Journals (Sweden)

    T.L. Kipnis

    1983-12-01

    Full Text Available Estoques de tripanossomas isolados de pacientes na fase aguda da doença de Chagas foram injetados em grupos de camundongos albinos não isogênicos nas doses de 10³, 10(4 e 10(5 parasitas/camundongos. O curso da infecção foi seguido por três meses. A pctrasitemia foi em geral baixa, com picos recorrentes, na maioria das vezes os animais evoluiam para cronicidade. Somente um estoque induziu alto índice de mortalidade. Os parasitas e as lesões apesar de detectadas no pico da parasitemia e restritos ao coração estavam ausentes aos três meses. Nesta época os perfis de Igs apresentaram diferenças marcantes. Grupos de animais que foram inoculados com estes estoques foram desafiados com doses letais da cepa Y ou CL. Em alguns casos obteve-se uma parasitemia, mas patente.

  11. Inmunofenotipos aberrantes en leucemias agudas en una población hospitalaria de Buenos Aires Aberrant immunophenotypes in acute leukemia in a Buenos Aires' hospital population

    Directory of Open Access Journals (Sweden)

    Viviana Novoa

    2013-02-01

    Full Text Available La citometría de flujo multiparamétrica es el método de elección para la caracterización inmunofenotípica de las células hematopoyéticas clonales presentes en los distintos procesos leucémicos agudos. El objetivo fue analizar la expresión de antígenos de membrana y evaluar la presencia de fenotipos aberrantes en los blastos de pacientes con diagnóstico de leucemia aguda, que permiten el monitoreo de la respuesta al tratamiento. Se revisaron los inmunofenotipos de 364 muestras de pacientes adultos derivadas a nuestro laboratorio en un período de 7 años. El inmunofenotipo se realizó por citometría de flujo con un amplio panel de anticuerpos monoclonales con el que se evaluó la expresión de antígenos de linaje linfoide, mieloide y también antígenos de maduración. De las 364 muestras estudiadas, 60.2% presentaron un fenotipo compatible con leucemia mieloide aguda (LMA, 28.8% con leucemia linfoblástica B (LLA-B, 6.6% con leucemia linfoblástica T (LLA-T y 4.4% con leucemias agudas poco frecuentes. La presencia de fenotipos aberrantes se observó en 89% de los casos, los fenotipos aberrantes identificados fueron: 1 infidelidad de linaje: LMA (54%, LLA-B (40%, LLA-T (29%; 2 ausencia de expresión antigénica: LMA (21%, LLA-B (35%, LLA-T (70%; 3 alteración de la expresión antigénica: LMA (67%, LLA-B (66%, LLA-T (84%; 4 asincronismo madurativo: LMA (26%, LLA-B (37% y 5 fenotipo ectópico: LLA-T 96%. El análisis por citometría de flujo multiparamétrica de las leucemias agudas permitió la identificación de fenotipos aberrantes en la mayoría de nuestros pacientes, que son de utilidad para el monitoreo de la respuesta al tratamiento.Multiparameter flow cytometry (MFC has become the preferred method for the lineage assignment and maturational analysis of malignant cells in acute leukemias. Multiparametric immunophenotyping analysis allows the detection of aberrant antigen expression and the analysis of heterogeneity and

  12. Toxicidad aguda del cobre (Cu 2+ en postlarvas de camarón de río Cryphiops caementarius (Natantia, Palaemonidae

    Directory of Open Access Journals (Sweden)

    Raúl Mendoza-Rodríguez

    2013-04-01

    Full Text Available El presente trabajo evaluó la toxicidad del cobre sobre postlarvas de camarón de río Cryphiops caementarius mediante pruebas de toxicidad aguda, con el objetivo de determinar la concentración letal media (LC50-96. Los resultados refl ejaron que este estadío es muy sensible al cobre, en- contrando valores de LC50-96 de 0,546 mg.l-1. La sobrevivencia y la actividad natatoria fueron afectadas por el cobre, disminuyendo a medida que aumenta la concentración, encontrándose que las concentraciones nocivas fueron 1,0 y 2,0 mg.l-1 (63,3 y 100% mortalidad para 96 h; las concentraciones de 0,16 y 0,25 mg.l-1 fueron tolerables (0% de mortalidad para 48 h.

  13. Estudo da ação inflamatória aguda do tiopental intraperitoneal em ratos Acute inflammatory action of tiopental intraperitoneal in rats

    OpenAIRE

    A.B. Carregaro; M.B. Castro; F.S. Martins

    2005-01-01

    Determinou-se a ação inflamatória aguda do tiopental intraperitoneal (IP) utilizando-se 72 ratos, divididos em grupo-tratado (40mg/kg de tiopental a 2,5% IP) e grupo-controle (0,25ml de solução fisiológica IP). Para determinar o processo inflamatório, colheu-se o lavado peritoneal às 2, 6, 12, 24 e 48h após a inoculação. Os animais foram anestesiados com isoflurano e submetidos à eutanásia por secção dos vasos cervicais. Administraram-se 5ml de solução fisiológica heparinizada por via IP e, a...

  14. Avaliação da reprodutibilidade da tomografia computadorizada no estadiamento da pancreatite aguda Reproducibility in the assessment of acute pancreatitis with computed tomography

    Directory of Open Access Journals (Sweden)

    Edison de Oliveira Freire Filho

    2007-12-01

    Full Text Available OBJETIVO: Medir a reprodutibilidade da tomografia computadorizada sem e com contraste na avaliação da gravidade da pancreatite aguda. MATERIAIS E MÉTODOS: Cinqüenta e um exames de tomografia computadorizada abdominal sem e com contraste de pacientes com pancreatite aguda foram analisados por dois radiologistas (observadores 1 e 2. Calculamos o índice morfológico pela tomografia computadorizada sem e com contraste, separadamente, e o índice de gravidade da tomografia computadorizada para pancreatite aguda. Medimos a reprodutibilidade intra- e interobservador da tomografia computadorizada através do índice kappa (kapa. RESULTADOS: Para a concordância interobservador obtivemos kapa de 0,666, 0,705, 0,648, 0,547 e 0,631 para índice morfológico sem e com contraste, presença de necrose pancreática, extensão da necrose pancreática e índice de gravidade da tomografia computadorizada, respectivamente. Para a concordância intra-observador dos observadores 1 e 2 obtivemos, respectivamente, kapa de 0,796 e 0,732 para o índice morfológico sem contraste; 0,725 e 0,802 para o índice morfológico com contraste; 0,674 e 0,849 para a presença de necrose pancreática; 0,606 e 0,770 para a extensão da necrose pancreática; e 0,801 e 0,687 para o índice de gravidade da tomografia computadorizada. CONCLUSÃO: O estadiamento da pancreatite aguda pela tomografia computadorizada por meio do índice morfológico e do índice de gravidade da tomografia computadorizada é um método bastante reprodutível. O não-uso do contraste não afeta a reprodutibilidade da tomografia computadorizada para o cálculo do índice morfológico.OBJECTIVE: To evaluate the reproducibility of unenhanced and contrast-enhanced computed tomography in the assessment of patients with acute pancreatitis. MATERIALS AND METHODS: Fifty-one unenhanced and contrast-enhanced abdominal computed tomography studies of patients with acute pancreatitis were blindly reviewed by two

  15. Hemorragias multisistémicas por uremia aguda en un perro Dálmata, reporte de caso clínico

    OpenAIRE

    IA De la Rosa-Zarate; S Díaz González-Vieyra

    2011-01-01

    Uremia se define como el síndrome tóxico polisistémico que se produce como resultado de la función renal anormal y no sólo el incremento de urea, en esta etapa se producen diferentes signos clínicos derivados de alteraciones fisiológicas o metabólicas provocadas por la acumulación de múltiples toxinas urémicas que generan alteraciones en diferentes órganos o sistemas La uremia aguda progresa a través de tres fases clínicas: inicio, mantenimiento y recuperación. Las consecuencias clínicas de l...

  16. Características genéticas da leucemia promielocítica aguda de novo Genetics characteristics of de novo acute promyelocytic leukemia

    OpenAIRE

    Aline M. Leal; Cristina A. Kumeda; Elvira D. R. P. Velloso

    2009-01-01

    Geneticamente, a leucemia promielocítica aguda (LPA) caracteriza-se por alterações cromossômicas estruturais recorrentes, na grande maioria das vezes translocações, envolvendo sempre o lócus gênico para o receptor alfa do ácido retinoico (RARα) localizado no braço longo do cromossomo 17 (17q21), levando à formação de genes quiméricos e oncoproteínas de fusão. Em aproximadamente 98% dos casos, o gene RARα se encontra fusionado com o gene PML resultante da translocação cromossômica re...

  17. Mastoiditis aguda: estudio epidemiológico de una década Acute mastoiditis: one-decade long epidemiological study

    Directory of Open Access Journals (Sweden)

    C. Suárez Castañón

    2009-01-01

    Full Text Available

    Objetivos: Describir las características clínicas de los pacientes ingresados por mastoiditis aguda en nuestro hospital.
    Material y métodos: Estudio descriptivo retrospectivo de niños con mastoiditis aguda ingresados en el Hospital de Cabueñes (Gijón, entre enero de 1997 y diciembre de 2007.
    Resultados: Se incluyeron 28 pacientes (54% varones con edad media de 35,5 meses. Siete casos (25% ocurrieron en 2007. El 28% de pacientes refería antecedente de otitis recurrentes. El 61% de los niños recibía tratamiento antibiótico en el momento del diagnóstico. Los síntomas más frecuentes fueron tumefacción, eritema y/o despegamiento en la región retroauricular (96%, fiebre (86%, otalgia (64% y otorrea (36%. El recuento leucocitario fue superior a 15.000/mm3 en el 79% de los casos y el valor medio de la
    PCR fue 79,3 mg/L. Se realizó estudio microbiológico en 21 niños (75%. S. pneumoniae y P. aeruginosa (3 casos cada uno fueron los patógenos hallados con más frecuencia. La estancia media hospitalaria fue de 8 días. Se realizó miringotomía en 15 pacientes (53,6%. Siete pacientes precisaron cirugía. Las complicaciones registradas fueron: una cofosis (en un paciente con laberintitis por S. aureus, una parálisis facial transitoria, un absceso subperióstico temporal y un colesteatoma.
    Conclusiones: La mastoiditis aguda continúa siendo una complicación relativamente frecuente de la otitis media aguda, responsable de una considerable morbilidad, que requiere un adecuado manejo por parte de los diversos especialistas implicados, con el fin de realizar un diagnóstico y tratamiento tempranos que eviten complicaciones. Es necesaria una adecuada observación epidemiológica para determinar si existe realmente una incidencia creciente en nuestro medio.

    Objective: To describe clinical characteristics of children admitted to our hospital with a diagnosis of acute mastoiditis.
    Material and methods

  18. Necrose pancreática delimitada e outros conceitos atuais na avaliação radiológica da pancreatite aguda

    OpenAIRE

    Elen Freitas de Cerqueira Cunha; Manoel de Souza Rocha; Fábio Payão Pereira; Roberto Blasbalg; Ronaldo Hueb Baroni

    2014-01-01

    A pancreatite aguda é uma condição inflamatória causada por ativação intracelular e extravasamento inapropriado de enzimas proteolíticas que determinam destruição do parênquima pancreático e dos tecidos peripancreáticos. Consiste em uma condição clínica bastante frequente, identificando-se duas formas principais de apresentação: a forma edematosa, menos intensa, e a forma necrosante, a forma grave da doença que acomete uma proporção significativa dos pacientes. A avaliação radiológica, sobret...

  19. Comunicação e educação nas consultas de crianças com infecções respiratórias agudas

    Directory of Open Access Journals (Sweden)

    Ana Paula Alves de Carvalho

    2011-08-01

    Full Text Available Este estudo objetivou identificar as orientações de cuidado à criança com infecções respiratórias agudas (IRA e descrever o processo de comunicação entre profissionais e mães na consulta. Os dados foram coletados em Unidades Básicas de Saúde, em entrevistas e observação de consultas de enfermeiras e médicos a crianças com IRA. Os resultados mostram orientações variáveis e incompletas entre os profissionais, predominantemente prescritivas e centradas na doença, principalmente no tratamento medicamentoso. A comunicação é centrada no profissional, o que não favorece um processo educativo emancipatório. Conclui-se a necessidade de incluir esses conteúdos na formação inicial e permanente dos profissionais.

  20. Importancia pronóstica de la expresión de MDR-1 en la leucemia mieloblástica aguda

    OpenAIRE

    J. Arbelbide; H. Garcia Rivello; M. C. Tacchi; D. Fantl; M. P. Cardenas; D. Penchasky; S. Viñuales; A. Morandi; E. M. Nucifora

    2003-01-01

    Una proporción importante de pacientes con leucemia mieloblástica aguda (LMA) presentan recaída o resistencia con el tratamiento. Uno de los mecanismos involucrados en la resistencia a drogas, es la presencia de la glicoproteína P 170 (gp-P 170) resultante de la expresión del gen MDR-1 sobre las células leucémicas. El objetivo de este trabajo es valorar el impacto pronóstico de la expresión de MDR-1 en una población de pacientes tratados por LMA. Se evaluó retrospectivamente la expresión de M...

  1. Aplicación terapéutica de agentes inhibidores de CD44 frente a la leucemia linfoblástica aguda (ALL) humana

    OpenAIRE

    Toribio, María Luisa; García-Peydró, Marina; Sánchez Madrid, Francisco

    2012-01-01

    [ES] La presente invención describe la aplicación terapéutica de agentes inhibidores de CD44 frente a la leucemia linfoblástica aguda (ALL) humana. En concreto, la presente invención hace referencia a un agente inhibidor de la función de CD44 para su uso en medicina, preferentemente para la prevención y/o tratamiento de la T-ALL humana, así como a una composición farmacéutica y un kit. La presente invención también hace referencia aun método de prevención y/o tratamiento de la T-ALL humana, a...

  2. Aplicación terapéutica de agentes inhibidores de CD44 frente a la leucemia linfoblástica aguda (ALL) humana

    OpenAIRE

    Toribio, María Luisa; García-Peydró, Marina; Sánchez Madrid, Francisco

    2012-01-01

    La presente invención describe la aplicación terapéutica de agentes inhibidores de CD44 frente a la leucemia linfoblástica aguda (ALL) humana. En concreto, la presente invención hace referencia a un agente inhibidor de la función de CD44 para su uso en medicina, preferentemente para la prevención y/o tratamiento de la T-ALL humana, así como a una composición farmacéutica y un kit. La presente invención también hace referencia a un método de prevención y/o tratamient...

  3. Reação de fase aguda e parasitismo na veia central da supra-renal de chagásicos crônicos

    OpenAIRE

    Daniel Ferreira da Cunha; Cláudio de Oliveira Vieira; Gisele de Paula e Silva; Gislaine Rogéria Erédia; Vicente de Paula Antunes Teixeira

    1994-01-01

    A reação sistêmica aos traumatismos e infecções graves, reação de fase aguda, (RFA), pode determinar imunossupressão e reativação de infecções latentes. O objetivo do trabalho foi verificar, em 71 chagásicos crônicos com ousem RFÁ, a freqüência de parasitismo pelo T. cruzi na veia central da supra-renal (VCSR). Os critérios para RFA (+) foram observados em 30 chagásicos: l)morteporsepsis e/outrauma após evolução maior que umasemana e 2)presença de úlceras de stress sangrantes, ou 3) hiperplas...

  4. Terapia de reidratação oral para diarréia aguda em região do nordeste do Brasil, 1986-1989

    OpenAIRE

    Clóvis E. S. Galvão; da Silva, Antônio A.M.; Raimundo A. da Silva; Stelito A. dos Reis Filho; Maria A. da S. Novochadlo; Gilvana de J. do V. Campos

    1994-01-01

    Foi estudada a utilização da Terapia de Reidratação Oral (TRO) no tratamento da diarréia infantil aguda em menores de cinco anos de idade, através de inquérito domiciliar transversal nos anos de 1986 e 1989, em três localicadades da ilha de São Luís, MA, Brasil. A prevalência da doença diarréica foi alta (16,8% e 7,8%) e a utilização da TRO baixa (31% e 25,3%), em 1986 e 1989, havendo decréscimo estatisticamente significante desta taxa entre esses anos. A utilização da TRO foi maior entre 6 e...

  5. Registro multicéntrico de disección aórtica aguda. Estudio RADAR. Resultados preliminares

    Directory of Open Access Journals (Sweden)

    Mariano Benzadón

    2009-01-01

    Full Text Available RESUMENIntroducciónEl síndrome aórtico agudo (SAA representa aún hoy una de las más serias afeccionescardiovasculares debido a su alta morbilidad y mortalidad, por lo que el diagnóstico precozes de vital importancia.ObjetivosEl Registro de la Sociedad Argentina de Cardiología de Disecciones AóRticas Agudas (RADARtiene por objetivo analizar las modalidades de presentación, el diagnóstico, el tratamientoy la mortalidad del SAA a través de un registro continuo de esta enfermedad pocoprevaleciente.Material y métodosDesde febrero de 2007 hasta abril de 2009, 12 centros enrolaron 95 pacientes consecutivosadmitidos con diagnóstico de SAA, de los que se obtuvieron las características clínicas basales,los estudios complementarios, el tipo de tratamiento y la evolución clínica.ResultadosEl 68% fueron hombres, la edad media fue de 58,8 ± 13,9 años, el 78% fueron diseccionesaórticas de tipo A y el 22% de tipo B. El 84% de los pacientes eran hipertensos, el 28%tabaquistas y el 24% dislipidémicos. El dolor precordial o dorsal estuvo presente en el 85,1%.La mediana global del intervalo síntomas - inicio de la intervención fue de 18 horas (12-72.El 89% de las disecciones de tipo A y el 15% de las de tipo B recibieron tratamiento quirúrgico.Los betabloqueantes se utilizaron en el 64,7% de los casos, el nitroprusiato de sodio enel 47,4%, el ácido acetilsalicílico en el 15,8%, los anticoagulantes en el 3,2% y los trombolíticosen el 3,2%. La mortalidad global fue del 32,6%. La mortalidad en las disecciones de tipo Afue del 37,8% (31% en los operados versus 87,5% en los no operados; p = 0,01. La mortalidadde las disecciones de tipo B fue del 14% en los operados y del 12% en los no operados(p = ns. Se observó un patrón de variación horaria circadiana con respecto al horario delinicio de los síntomas, con un pico en las horas matinales. El análisis de regresión logísticamostró que las variables independientes asociadas con la

  6. Disección aórtica aguda: serie cronológica (1987-2007.

    Directory of Open Access Journals (Sweden)

    José Bermúdez López

    2011-08-01

    Full Text Available

    Fundamento: La disección aórtica es una emergencia médica, no tan infrecuente como se acostumbra suponer, aunque sí a menudo no diagnosticada.
    Objetivo: Analizar las características clínico patológicas de los fallecidos por disección aórtica aguda.
    Métodos: Se realizó un estudio descriptivo, analítico, de serie de casos (61 pacientes durante los años 1987-2007 en el Hospital Universitario “Dr. Gustavo Aldereguía Lima” de Cienfuegos. Las variables del estudio fueron: edad, sexo, raza, antecedentes patológicos personales de hipertensión arterial, clasificación de la disección, presencia o no de hipertrofia ventricular izquierda, síntoma principal de presentación, diagnóstico clínico al ingreso, y la presencia o no de rotura de la disección. Asimismo, se determinó la tendencia de la mortalidad hospitalaria por dicha entidad.
    Resultados: Predominaron los pacientes ancianos, del sexo masculino y raza blanca con antecedentes de hipertensión arterial. Se comprobó una alta frecuencia de hipertrofia ventricular izquierda. Los síntomas de presentación más frecuentes fueron el dolor torácico, la toma de conciencia, la disnea y el dolor abdominal. La mortalidad aunque con oscilaciones presentó una tendencia al aumento en la serie cronológica estudiada.
    Conclusiones
    : El cuadro clínico, con síntomas de presentación disímiles, provoca que el diagnóstico inicial de disección no se tome en cuenta. El control de factores de riesgo cardiovascular en la comunidad debe ser la piedra angular para la prevención de este trastorno potencialmente mortal.

     

    ACUTE AORTIC DISSECTION: TIME SERIES (1987-2007.

    Background: Aortic dissection is a medical emergency: This condition is not as rare as we usually assume it is and in many cases it is not diagnosed.

  7. Acute respiratory infections in children Infecções respiratórias agudas em crianças

    Directory of Open Access Journals (Sweden)

    Charles Anthony Hart

    2007-03-01

    Full Text Available Acute respiratory infections (ARI are the leading cause of mortality in children under five years of age worldwide and most of these deaths are due to bronchiolitis and pneumonia. Recent evidence from studies using genome detection systems such as polymerase chain reaction or micro-array technology show that, in most cases, these deaths are caused or precipitated by viruses. In this paper, the definitions of upper and lower respiratory tract infections are reviewed. The principal signs of disease severity and the burden of viruses as causes of ARI are described. The prominent role of Respiratory Syncytial Virus is stressed, with data from epidemiological and clinical studies. Other important viral pathogens, such as Human Metapneumovirus, Human coronaviruses and Influenza are examined. The role of newly described viruses, such as bocavirus, is also discussed. The impact of HIV/AIDS in ARI burden and presentation assessed and the weight of Pneumocystis jiroveci and Mycobacterium tuberculosis infections is recognized. It is concluded that there is an urgent need to improve diagnostics, therapeutics and vaccines, as well as macro and micronutrient intake of children of the world, particularly in developing countries.As infecções respiratórias agudas (IRA são as principais causas da40 mortalidade mundial em crianças menores de cinco anos de idade e a maioria dessas mortes são próprias da bronquiolite e pneumonia. Recentes evidências de estudos usando sistemas de detecção no genoma tais como reação em cadeia da polimerase ou tecnologia de microarrays mostram que, na maioria dos casos, essas mortes são causadas ou precipitadas por vírus. Neste artigo, as definições das infecções dos tratos respiratórios superior e inferior são revisadas. Os principais sinais da gravidade da doença e a carga viral como causas da IRA estão descritas. O papel proeminente do vírus sincicial respiratório é enfatizado, com dados de estudos cl

  8. Radical production from photosensitization of imidazoles

    Science.gov (United States)

    Corral Arroyo, P.; Gonzalez, L.; Steimer, S.; Aellig, R.; Volkamer, R. M.; George, C.; Bartels-Rausch, T.; Ammann, M.

    2015-12-01

    Reactions promoted by light are key in atmospheric chemistry. Some of them occur in the condensed phase of aerosols containing light absorbing organic compounds (George et al., 2015). This work explores the radical reactions initiated by near-UV light in mixtures of citric acid (CA) and imidazole-2-carboxaldehyde (IC) using NO as a probe molecule for HO2, by means of coated wall flow tube experiments. Citric acid may act as H atom or electron donor in condensed phase radical cycles. IC may act as a photosensitizer. The loss of NO was measured by a chemiluminescence detector. The dependence of the NO loss on the NO concentration, the IC/CA ratio in the film, relative humidity, light intensity, oxygen molar fraction were investigated as well as the HONO and NO2 yields. We also added halide salts to investigate the effect of a competing electron donor in the system and the output of halogens to the gas phase. We found a correlation between the loss of NO above the film and the molar ratio of IC/CA and the light intensity. The variation of the NO loss with oxygen corroborates a mechanism, in which the triplet excited state of IC is reduced by citric acid, to a reduced ketyl radical that transfers an electron to molecular oxygen, which in turn leads to production of HO2 radicals. Therefore, the NO loss in the gas phase is related to the production of HO2 radicals. Relative humidity had a strong impact on the HO2 output, which shows a maximum production rate at around 30%. The addition of halide ions (X- = Cl-, Br-, I-) increases the HO2 output at low concentration and decrease it at higher concentration when X2- radical ions likely scavenge HO2. We could preliminarily quantify for the first time the contribution of these processes to the oxidative capacity in the atmosphere and conclude that their role is significant for aerosol aging and potentially a significant source of halogen compounds to the gas phase.

  9. Inguinal hernia developed after radical retropubic surgery for prostate cancer

    OpenAIRE

    Chung, Choon Sik; Jeong, Gyu Young; Kim, Seung Han; Lee, Dong Keun

    2013-01-01

    Purpose In this retrospective study, we aimed to compare the clinical characteristics of inguinal hernia developed after radical retropubic surgery for prostate cancer to the hernia without previous radical prostatectomy. Methods Twenty-three patients (group A) who had radical retropubic surgery for prostate cancer underwent laparoscopic or open tension-free inguinal hernia repair from March 2007 to February 2011. Nine hundred and forty patients (group B) without previous radical retropubic s...

  10. The Serbian Radical movement 1881-1903: A historical aspect

    OpenAIRE

    Protić Milan St.

    2005-01-01

    Focusing on the initial stage (until 1903) of the Serbian Radical movement the paper attempts to delineate and explicate the main phases of its political maturation. In its initial stage Serbian Radicalism passed through several significant phases. The earliest phase (1869-80) may be named the period of rudimentary Radicalism. The movement was unorganized and oscillated between the ideas of socialism, anarchism and peasant democracy. The year 1881 saw the founding of the Radical Party as the ...

  11. Free radicals, antioxidants and functional foods: Impact on human health

    OpenAIRE

    Lobo, V.; Patil, A.; A Phatak; N Chandra

    2010-01-01

    In recent years, there has been a great deal of attention toward the field of free radical chemistry. Free radicals reactive oxygen species and reactive nitrogen species are generated by our body by various endogenous systems, exposure to different physiochemical conditions or pathological states. A balance between free radicals and antioxidants is necessary for proper physiological function. If free radicals overwhelm the body's ability to regulate them, a condition known as oxidative stress...

  12. Síndrome aguda do tórax como primeira manifestação de anemia falciforme em adulto

    Directory of Open Access Journals (Sweden)

    BOK YOO HUGO HYUNG

    2002-01-01

    Full Text Available A síndrome aguda do tórax (SAT acomete portadores de anemia falciforme e é responsável por cerca de 25% dos óbitos. Relata-se o caso de um homem pardo de 45 anos, alcoolista crônico, sem nenhum antecedente de falcização, com quadro de pneumonia-símile havia sete dias. A radiografia simples do tórax mostrou infiltrado heterogêneo bilateral, com áreas de consolidação e broncograma aéreo e derrame pleural à esquerda. Outros exames laboratoriais revelaram anemia, leucocitose com desvio à esquerda e hipoxemia. Tratado com cefoxitina e amicacina, o paciente evoluiu rapidamente para insuficiência respiratória aguda e morreu 14 horas após a internação. Na necropsia, no exame dos pulmões observaram-se intensa congestão, hemorragia intra-alveolar, dano alveolar difuso e hemácias com morfologia falciforme. O caráter rápido, progressivo e freqüentemente mimetizado por outras doenças torna a SAT um evento dramático e de diagnóstico precoce difícil, sendo, entretanto, obrigatória tê-la sempre em mente, especialmente em um país com grande população da raça negra como o Brasil.

  13. Reflexões acerca da crioterapia na fase aguda da artrite reumatóide e suas correlações com a crioglobulinemia

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    Dahyan Wagner da Silva Silveira

    2006-01-01

    Full Text Available Artrite Reumatóide é uma doença sistêmica, caracterizada por um quadro inflamatório crônico com sinovite poliarticular persistente, de etiologia desconhecida e com grande potencial deformante. A imunoglobulina alterada é encontrada na maioria dos portadores, o que aumenta a probabilidade do paciente produzir crioglobulinas e desenvolver vasculite crioglobulinêmica. O objetivo deste estudo é analisar a indicação e a utilização da crioterapia no tratamento da fase aguda da Artrite Reumatóide e suas implicações com a crioglobulinemia. A crioterapia é um excelente recurso terapêutico no combate a fase aguda da Artrite Reumatóide, por seu efeito antiinflamatório e analgésico, além de evitar a ação da enzima colagenase que atua na degeneração da articulação. Com fator reumatóide positivo e presença de crioglobulinas a crioterapia é contra-indicada, devido à acentuação do potencial deformante da doença. Trata-se de uma revisão de literatura de livros e periódicos da Biblioteca da Universidade Estadual do Sudoeste da Bahia (UESB – campus de Jequié, e de artigos científicos nos bancos de dados da Bireme e Scielo, através das fontes Lilacs e Medline, totalizando 15 trabalhos analisados.

  14. Acute and chronic mesenteric ischemia: MDCT findings Isquemia mesentérica aguda e crônica: achados tomográficos

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    Bruna Schmitz Serpa

    2010-09-01

    Full Text Available Mesenteric ischemia is caused by a reduction in mesenteric blood flow. It can be divided into acute and chronic, based upon the rapidity and the degree to which the blood flow is compromised. The authors retrospectively reviewed 22 cases of mesenteric ischemia, diagnosed by multidetector computed tomography (MDCT in our service, and confirmed by surgery or clinical follow-up. The frequency of the diagnostic findings of chronic and acute mesenteric ischemia was evaluated. The improvement of three-dimensional (3D MDCT allows accurate assessment of mesenteric vessels. Therefore, it demonstrates changes in ischemic bowel segments helpful in determining the primary cause of the disease, and can identify the complications in patients with acute and chronic mesenteric ischemia.A isquemia mesentérica é causada pela redução do fluxo sanguíneo mesentérico. Essa patologia pode ser dividida em aguda e crônica, baseada na rapidez e no grau em que o fluxo sanguíneo está sendo comprometido. Os autores retrospectivamente revisaram 22 casos de isquemia mesentérica, diagnosticados por tomografia computadorizada com mutidetectores (TCMD em nosso serviço, e confirmados por cirurgia ou seguimento clínico. Os achados diagnósticos de isquemia aguda e crônica e sua frequência foram avaliados. Os avanços na TCMD 3D (tridimensional permitiram o acesso detalhado aos vasos mesentéricos. Além disso, é possível demonstrar alterações nos segmentos intestinais, auxiliando na identificação da causa primária da doença e podendo identificar as complicações associadas a isquemia mesentérica e crônica.

  15. Detección de benzodiacepinas en sujetos fallecidos por Reacción Aguda a Drogas en Galicia (1997-2011

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    D Miguel-Arias

    2016-01-01

    Full Text Available La muerte por reacción aguda a drogas constituye la complicación más grave del consumo de sustancias y una de las principales causas de mortalidad entre la población drogodependiente. Los análisis toxicológicos llevados a cabo en fallecidos muestran la presencia de múltiples sustancias debido a la extensión del patrón de policonsumo. La combinación más habitual (y más peligrosa, es la de varias sustancias depresoras del sistema nervioso central, en particular la asociación de opiáceos con benzodiacepinas y/o alcohol. Este hecho, junto con la extensión del uso y abuso de estos psicofármacos, con o sin prescripción facultativa, determina que estas sustancias sean detectadas con mucha frecuencia entre los fallecidos por esta causa. Estudiamos todas las muertes por reacción aguda tras consumo de drogas (n=805 en la Comunidad Autónoma de Galicia entre los años 1997- 2011. La mayoría de ellos eran varones (91,2%, solteros (47,7%, con una edad media de 34,3 años y con larga trayectoria de consumo.La presencia de benzodiacepinas fue detectada en el 42,4 % de todos los fallecidos. A lo largo de los años de estudio se observan diferencias significativas en este porcentaje, pero sin una tendencia clara. La sustancia que se encuentra con más frecuencia es el alprazolam, seguido del nordiazepam, diazepam y lormetazepam.

  16. Comportamento da síndrome coronariana aguda: resultados de um registro brasileiro Acute coronary syndrome behavior: results of a Brazilian registry

    Directory of Open Access Journals (Sweden)

    Leopoldo Soares Piegas

    2013-01-01

    Full Text Available FUNDAMENTO: O Brasil carece de registros multicêntricos publicados de síndrome coronariana aguda. OBJETIVO: O Registro Brasileiro de Síndrome Coronariana Aguda é um estudo multicêntrico nacional com objetivo de apresentar dados representativos das características clínicas, e manejo e evolução hospitalares dessa síndrome. MÉTODOS: Participaram 23 hospitais de 14 cidades. Foram elegíveis pacientes que se apresentaram com suspeita de síndrome coronariana aguda nas primeiras 24 horas, com quadro clínico sugestivo, associado a alterações eletrocardiográficas compatíveis e/ou marcadores de necrose. O seguimento foi realizado até o óbito ou a alta hospitalar. RESULTADOS: Entre os anos de 2003 e 2008, foram incluídos 2.693 pacientes com diagnóstico de síndrome coronariana aguda, sendo 864 (32,1% mulheres. O diagnóstico final foi de angina instável para 1.141 (42,4% pacientes, com mortalidade de 3,06% deles; de infarto agudo do miocárdio sem supradesnível de ST para 529 (19,6% pacientes, com mortalidade de 6,8% deles; e de infarto agudo do miocárdio com supradesnível de ST para 950 (35,3% pacientes, com mortalidade de 8,1% deles; tiveram diagnóstico não confirmado 73 (2,7% pacientes, com mortalidade de 1,36% deles. A mortalidade global foi de 5,53%. O modelo de regressão logística múltipla identificou o gênero feminino (OR=1,45, o diabetes melito (OR=1,59, o índice de massa corporal (OR=1,27 e a intervenção coronariana percutânea (OR=0,70 como fatores de risco de óbito, para demografia e intervenções. Um modelo para óbito por complicações maiores identificou choque cardiogênico/Edema Agudo de Pulmão (OR=4,57, reinfarto (OR=3,48, acidente vascular cerebral (OR=21,56, sangramento grave (OR=3,33, parada cardiorrespiratória (OR=40,27 e classe funcional de Killip (OR=3,37. CONCLUSÃO: Os dados do Registro Brasileiro de Síndrome Coronariana Aguda não diferem de outros coletados fora do país. Seus achados poder

  17. Generation and propagation of radical reactions on proteins

    DEFF Research Database (Denmark)

    Hawkins, C L; Davies, Michael Jonathan

    2001-01-01

    The oxidation of proteins by free radicals is thought to play a major role in many oxidative processes within cells and is implicated in a number of human diseases as well as ageing. This review summarises information on the formation of radicals on peptides and proteins and how radical damage may...

  18. Hybrid radical energy storage device and method of making

    Energy Technology Data Exchange (ETDEWEB)

    Gennett, Thomas; Ginley, David S.; Braunecker, Wade; Ban, Chunmei; Owczarczyk, Zbyslaw

    2016-04-26

    Hybrid radical energy storage devices, such as batteries or electrochemical devices, and methods of use and making are disclosed. Also described herein are electrodes and electrolytes useful in energy storage devices, for example, radical polymer cathode materials and electrolytes for use in organic radical batteries.

  19. Biochemistry and pathology of radical-mediated protein oxidation

    DEFF Research Database (Denmark)

    Dean, R T; Fu, S; Stocker, R;

    1997-01-01

    Radical-mediated damage to proteins may be initiated by electron leakage, metal-ion-dependent reactions and autoxidation of lipids and sugars. The consequent protein oxidation is O2-dependent, and involves several propagating radicals, notably alkoxyl radicals. Its products include several catego...

  20. α-Carbonyl Radical Cyclizatio n in Organic Synthesis

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    @@ Intramolecular radical cyclization reactions are now used routinely to synthesize carbocyclic and heterocyclic structures. We have reported that α-carbonyl radicals 1, generated from the corresponding iodo ketones or enones, underwent intramolecular radical cyclization smoothly to afford products 2.1, 2,3

  1. Radical radiotherapy for carcinoma of the vulva

    International Nuclear Information System (INIS)

    A study was made of 58 patients with carcinoma of the vulva treated by radical radiotherapy between 1965 and 1982. The choice of treatment technique was influenced by site and extent of disease as well as the general condition of the patient. The crude 5-year survival was 26% (15/58). Local control was achieved in 40% of cases and was associated with tumour size of 4 cm or less. Radionecrosis occurred in nine cases but none of these required surgical intervention. Surgery remains the treatment of choice for carcinoma of the vulva. This report emphasizes that radical radiotherapy has a curative potential in those cases considered unsuitable for surgery and that the necrosis type and rate are within the limits of acceptable morbidity. (author)

  2. Freedom Now! Radical Jazz and Social Movements

    Directory of Open Access Journals (Sweden)

    Przemysław Pluciński

    2014-01-01

    Full Text Available Music is obviously not only an aesthetic phenomenon. It is embeddedin a dense network of social relations. However, its social involvementis rather ambiguous, particularly since the second half of the twentiethcentury. On the one hand, music is one of the main elements of culturalcapitalism and a part of the system of domination. On the other hand,music provokes, (coproduces or possibly strengthens and coexists witha number of counterdiscourses and social projects of counterhegemoniccharacter.The main objective of the paper is to examine relationships between both, revolutionary jazz and revolutionary social movements, namely the civil rights movement, but above all radical movements, especially black power movement. The crucial questions I am interested in are problems of selforganization, performative social practices, as well as alternatives elaborated by radical-oriented jazz circles in various social dimensions, for instance economic or symbolic.

  3. Regularities and Radicals in Near-rings

    Institute of Scientific and Technical Information of China (English)

    N.J. Groenewald

    2002-01-01

    Let F be a regularity for near-rings and F(R) the largest FR-regular ideal in R. In the first part of this paper, we introduce the concepts of maximal Fmodular ideals and F-primitive near-rings to characterize F(R) for any near-ring regularity F. Under certain conditions, F(R) is equal to the intersection of all the maximal F-modular ideals of R. As examples, we apply this to the different analogs of the Brown-McCoy radicals and also the Behrens radicals. In the last part of this paper, we show that for certain regularities, the class of F-primitive near-rings forms a special class.

  4. Radical radiotherapy for carcinoma of the vulva

    Energy Technology Data Exchange (ETDEWEB)

    Slevin, N.J.; Pointon, R.C.S.

    1989-02-01

    A study was made of 58 patients with carcinoma of the vulva treated by radical radiotherapy between 1965 and 1982. The choice of treatment technique was influenced by site and extent of disease as well as the general condition of the patient. The crude 5-year survival was 26% (15/58). Local control was achieved in 40% of cases and was associated with tumour size of 4 cm or less. Radionecrosis occurred in nine cases but none of these required surgical intervention. Surgery remains the treatment of choice for carcinoma of the vulva. This report emphasizes that radical radiotherapy has a curative potential in those cases considered unsuitable for surgery and that the necrosis type and rate are within the limits of acceptable morbidity.

  5. Anion photoelectron spectroscopy of radicals and clusters

    Energy Technology Data Exchange (ETDEWEB)

    Travis, Taylor R.

    1999-12-16

    Anion photoelectron spectroscopy is used to study free radicals and clusters. The low-lying {sup 2}{Sigma} and {sup 2}{Pi} states of C{sub 2n}H (n = 1--4) have been studied. The anion photoelectron spectra yielded electron affinities, term values, and vibrational frequencies for these combustion and astrophysically relevant species. Photoelectron angular distributions allowed the author to correctly assign the electronic symmetry of the ground and first excited states and to assess the degree of vibronic coupling in C{sub 2}H and C{sub 4}H. Other radicals studied include NCN and I{sub 3}. The author was able to observe the low-lying singlet and triplet states of NCN for the first time. Measurement of the electron affinity of I{sub 3} revealed that it has a bound ground state and attachment of an argon atom to this moiety enabled him to resolve the symmetric stretching progression.

  6. EPR study of free radicals in bread

    Science.gov (United States)

    Yordanov, Nicola D.; Mladenova, Ralitsa

    2004-05-01

    The features of the recorded EPR spectra of paramagnetic species formed in bread and rusk are reported. The appearance of free radicals in them is only connected with their thermal treatment since the starting materials (flour and grains) exhibit very weak EPR signal. The obtained EPR spectra are complex and indicate that: (i) the relative number of paramagnetic species depends on the temperature and treating time of the raw product; (ii) the g-values are strongly temperature dependent with a tendency to coincide at t≥220 °C. Because of the relatively low (150-220 °C) temperature of thermal treatment, the studied free radicals can be assumed to appear in the course of the browning (Maillard) reaction and not to the carbonization of the material.

  7. Editorial: RADICALISM AND POLITICS OF RELIGION

    Directory of Open Access Journals (Sweden)

    Editorial Al-Jami'ah: Journal of Islamic Studies

    2008-02-01

    Full Text Available Radical Islamism has become the “sexiest” issue in the international scholarship of religion since the September 11 tragedy in 2001. It has been associated with a number of terrorist attacks not only in the West but also in Muslim countries. Every single of radical Islamism has caught the interest of not only scholars and policy makers but also general public. Interestingly, the general assumption that religion is the source of peace has been seriously challenged, not by non-religious communities, but by the violent practices of particular religious groups, however small they are. Indeed, there are certain groups striving for Islam but by using acts which could give awful image on Islam itself and against humanity.

  8. Lipid modification processes induced by thiyl radicals

    Science.gov (United States)

    Mihaljević, Branka; Bujak, Ivana Tartaro

    2016-07-01

    Polyunsaturated fatty acid (PUFA) oxidation by thiyl radicals (RS•) is believed to be responsible for some of the biological radiation damage. At the same time, RS• can cause isomerization of PUFA double bonds with the formation of trans isomers. The aim of this study was to better understand the competition between lipid peroxidation and geometrical isomerization processes in biomimetic model system of linoleic acid in the presence of 2-mercaptoethanol using irradiation as a method for free radicals generation. In air-equilibrated conditions the propagation of lipid peroxidation was dominant up to the dose of 400 Gy, after which at higher doses up to 10 kGy the termination occurred with the predominance of geometrical isomerization. This study revealed that undesirable and permanent lipid modifications are possible at higher irradiation doses which should be considered in the planning of irradiation treatment of foods and feeds with high content of lipids and sulfur compounds.

  9. How Hume's Philosophy Informed Radical Behaviorism.

    Science.gov (United States)

    Nuzzolilli, Andrew E; Diller, James W

    2015-05-01

    The present paper analyzes consistencies between the philosophical systems of David Hume and B. F. Skinner, focusing on their conceptualization of causality and attitudes about scientific behavior. The ideas that Hume initially advanced were further developed in Skinner's writings and shaped the behavior-analytic approach to scientific behavior. Tracing Skinner's logical antecedents allows for additional historical and philosophical clarity when examining the development of radical behaviorism.

  10. The radical of a vertex operator algebra

    OpenAIRE

    Dong, C.; Li, H.; Mason, G.; Montague, P

    1996-01-01

    The radical $J(V)$ of a vertex operator algebra $V$ is defined to be the subspace of $V$ consisting of vectors $v$ such that the zero mode $o(v)=0$ on $V$ where $o(v)=v_{wt v-1}$ if $v$ is homogeneous. We establish various facts about $o(v),$ including the determination of $J(V)$ which is shown to be essentially equal to $(L(0)+L(-1))V.$

  11. EARLY POSTOPERATIVE COMPLICATIONS AFTER RADICAL CYSTECTOMY

    Directory of Open Access Journals (Sweden)

    V. O. Mager

    2014-08-01

    Full Text Available Radical cystectomy (RCE is associated with a considerable number of early postoperative complications as before. Based on 10 years’ experience, this paper demonstrates the frequency (33.9 % and types of early complications following RCE, as well as postoperative mortality (5.5 % and its resulting causes. Although postoperative mortality is relatively low today, the frequency of early postoperative complications remains high as before.

  12. EI igualitarismo radical de John Rawls

    OpenAIRE

    Rodríguez Zepeda, Jesús

    2004-01-01

    The main purpose of this paper is to offer an interpretation of the canonical statement of justice as fairness (A Theory of Justice) as a deeply egalitarian, even radical, argument. In order to do so, the categories of justice as fairness strongly related to the egalitarian and distributive meaning of the rawlsian liberal model and, specifically, those aimed to solve the problem of social justice, are accurately revised, namely, the fair equality of opportunity and the diff...

  13. The Electronic Dissertation: A less radical approach

    OpenAIRE

    Andre Costopoulos

    1999-01-01

    Cornelius Holtorf's article in Internet Archaeology, Issue 6 (1999) is a strident call for a radical application of hypermedia techniques to archaeological publishing. Like Holtorf, I recently produced and submitted a Ph.D. dissertation on electronic medium entitled Simulation and Modelling for Anthropological Archaeology (Costopoulos, 1999). My experience of the process, however, was quite different from Holtorf's. While his work concentrates on the hypertextuality of electronic media, mine ...

  14. AQUEOUS STABLE FREE RADICAL POLYMERIZATION PROCESSES

    Institute of Scientific and Technical Information of China (English)

    Andrea R. Szkurhan; Michael K. Georges

    2004-01-01

    An overview of aqueous polymerizations, which include emulsion, miniemulsion and suspension polymerizations,under stable free radical polymerization (SFRP) conditions is presented. The success of miniemulsion and suspension SFRP polymerizations is contrasted with the difficulties associated with obtaining a stable emulsion polymerization. A recently developed unique microprecipitation technique is referenced as a means of making submicron sized particles that can be used to achieve a stable emulsion SFRP process.

  15. Radical correction of Budd-Chiari syndrome

    Institute of Scientific and Technical Information of China (English)

    LI Xiao-qiang; WANG Zhong-gao; MENG Qing-you; SANG Hong-fei; QIAN Ai-min; DUAN Peng-fei; RONG Jian-jie

    2007-01-01

    Background Interventional therapy is widely accepted as the first choice for the treatment of the Budd-Chiari syndrome,but the use of radical correctional therapy should not be discarded. This study describes radical correction by controlling bleeding from distal end of pathological segment of the inferior vena cava (IVC) and discusses potential surgical errors and postoperative complications.Methods Of the 216 patients in the study, 78 were treated with simple membranectomy, 64 with dissection of the pathological segment of the IVC and vascular prosthesis or pericardial patch plasty, 60 with resection of the pathological segment of the IVC and orthotopic graft transplantation with vascular prosthesis, and 14 with resection of the occlusive main hepatic vein and its upper IVC, hepatic venous outflow plasty and vascular prosthesis orthotopic graft transplantation from the hepatic venous entrance to the IVC of right atrial ostium.Results Except 14 cases who were discharged after hepatic vein outflow plasty, four cases died postoperatively, and 198 patients were discharged without complications. The symptoms of 15 patients were relieved partially and 2 without any change. There were no deaths intraoperatively. Of the 112 cases who were followed up for 72 months, 13 suffered from a relapse.Conclusions Radical correction is a beneficial therapy in the treatment of Budd-Chiari syndrome.

  16. Radical induction theory of ulcerative colitis

    Institute of Scientific and Technical Information of China (English)

    Jay Pravda

    2005-01-01

    To propose a new pathogenesis called Radical Induction to explain the genesis and progression of ulcerative colitis (UC). UC is an inflammatory bowel disease. Colonic inflammation in UC is mediated by a buildup of white blood cells (WBCs) within the colonic mucosal lining; however,to date there is no answer for why WBCs initially enter the colonic mucosa to begin with. A new pathogenesis termed "Radical Induction Theory" is proposed to explain this and states that excess un-neutralized hydrogen peroxide, produced within colonic epithelial cells as a result of aberrant cellular metabolism, diffuses through cell membranes to the extracellular space where it is converted to the highly damaging hydroxyl radical resulting in oxidative damage to structures comprising the colonic epithelial barrier. Once damaged, the barrier is unable to exclude highly immunogenic fecal bacterial antigens from invading the normally sterile submucosa. This antigenic exposure provokes an initial immune response of WBC infiltration into the colonic mucosa. Once present in the mucosa,WBCs are stimulated to secrete toxins by direct exposure to fecal bacteria leading to mucosal ulceration and bloody diarrhea characteristic of this disease.

  17. Removal of NOx by radical injection

    Institute of Scientific and Technical Information of China (English)

    LIN He; GAO Xiang; LUO Zhongyang; CEN Kefa; PEI Meixiang; HUANG Zhen

    2004-01-01

    Removal of NOx ( DeNOx, NOx is the total of NO and NO2) from flue gas by radical injection has been investigated . The discharge characteristics were examined and the steady streamer corona was acquired by adjusting the nozzle gases properly. It was found that an increase in the voltage resulted in a decrease in the NO concentration and the concentration of the NO2 increased at low voltages but decreased as the voltage rose to a certain level. The DeNOx efficiency increased as the applied voltage rose and reached a maximum of 70% when the voltage approached the breakdown voltage. The hypothetical mechanism of NOx removal suggested that the radicals formed in the discharge process converted the NO and NO2 into acidic species. The Monte Carlo method was used to calculate the rate coefficients and the productivity of the radicals, and then the concentrations of both NO and NO2 and the DeNOx efficiencies were calculated with chemical kinetics. The calculated DeNOx efficiencies were comparable with the experimental DeNOx efficiencies at low voltages, but were lower at high voltages.

  18. [Free radicals and hepatic ischemia-reperfusion].

    Science.gov (United States)

    Szijártó, Attila

    2015-11-22

    The critical importance of the ischemic-reperfusive injury is well documented with regards to numerous organs and clinical conditions. Oxygen free radicals play a central role in the mediation of the injury, which dominantly influences the prevalence of postoperative complications, (long term) organ damage, and the potential manifestation of systemic reactions. The both anatomically and pathophysiologically unique ischemic-reperfusive injury of the liver, which is expressively vulnerable to free radicals, is of utmost importance in liver surgery. Several techniques (adaptive maneuvers, chemical agents) are known to ameliorate the reperfusive injury. Based on the prior research of the workgroup of the author, the aim of the current article is to overview the set of measures capable of attenuating ischemic-reperfusive injury (ischemic preconditioning, -perconditioning, administration of adenosine, -inosine, -levosimendan, and -poly-ADP-ribose-polymerase inhibitor), with special attention to the ischemic-reperfusive injury of the liver, as well as the special pathophysiological role of free radicals in mediating hepatic damage.

  19. Complications of Radical Cystectomy and Orthotopic Reconstruction

    Directory of Open Access Journals (Sweden)

    Wei Shen Tan

    2015-01-01

    Full Text Available Radical cystectomy and orthotopic reconstruction significant morbidity and mortality despite advances in minimal invasive and robotic technology. In this review, we will discuss early and late complications, as well as describe efforts to minimize morbidity and mortality, with a focus on ileal orthotopic bladder substitute (OBS. We summarise efforts to minimize morbidity and mortality including enhanced recovery as well as early and late complications seen after radical cystectomy and OBS. Centralisation of complex cancer services in the UK has led to a fall in mortality and high volume institutions have a significantly lower rate of 30-day mortality compared to low volume institutions. Enhanced recovery pathways have resulted in shorter length of hospital stay and potentially a reduction in morbidity. Early complications of radical cystectomy occur as a direct result of the surgery itself while late complications, which can occur even after 10 years after surgery, are due to urinary diversion. OBS represents the ideal urinary diversion for patients without contraindications. However, all patients with OBS should have regular long term follow-up for oncological surveillance and to identify complications should they arise.

  20. Growing up Radical: Investigation of Benzyl-Like Radicals with Increasing Chain Lengths

    Science.gov (United States)

    Korn, Joseph A.; Jawad, Khadija M.; Hewett, Daniel M.; Zwier, Timothy S.

    2015-06-01

    Combustion processes involve complex chemistry including pathways leading to polyaromatic hydrocarbons (PAHs) from small molecule precursors. Resonance stabilized radicals (RSRs) likely play an important role in the pathways to PAHs due to their unusual stability. Benzyl radical is a prototypical RSR that is stabilized by conjugation with the phenyl ring. Earlier work on α-methyl benzyl radical showed perturbations to the spectroscopy due to a hindered methyl rotor. If the alkyl chain is lengthened then multiple conformations become possible. This talk will discuss the jet-cooled spectroscopy of α-ethyl benzyl radical and α-propyl benzyl radical produced from the discharge of 1-phenyl propanol and 1-phenyl butanol respectively. Electronic spectra were obtained via resonant two-photon ionization, and IR spectra were obtained by resonant ion-dip infrared spectroscopy. Kidwell, N. M.; Reilly, N. J.; Nebgen, B.; Mehta-Hurt, D. N.; Hoehn, R. D.; Kokkin, D. L.; McCarthy, M. C.; Slipchenko, L. V.; Zwier, T. S. The Journal of Physical Chemistry A 2013, 117, 13465.

  1. Peroxy radical chemistry and OH radical production during the NO3-initiated oxidation of isoprene

    Directory of Open Access Journals (Sweden)

    P. O. Wennberg

    2012-01-01

    Full Text Available Peroxy radical reactions (RO2 + RO2 from the NO3-initiated oxidation of isoprene are studied with both gas chromatography and a chemical ionization mass spectrometry technique that allows for more specific speciation of products than in previous studies of this system. We find high nitrate yields (>~80%, consistent with other studies. We further see evidence of significant hydroxyl radical (OH formation in this system, which we propose comes from RO2 + HO2 reactions with a yield of ~42–62%. An additional OH source is the second generation oxidation of the nitrooxyhydroperoxide, which produces OH and a dinitrooxyepoxide with a yield of ~35%. The branching ratio of the radical propagating, carbonyl- and alcohol-forming, and dimer-forming channels of the RO2 + RO2 reaction are found to be ~18–38%, ~59–77%, and ~3–4%, respectively. HO2 formation in this system is lower than has been previously assumed. Addition of RO2 to isoprene is suggested as a possible route to the formation of several isoprene dimer compounds (ROOR. The nitrooxy, allylic, and C5 peroxy radicals present in this system exhibit different behavior than the limited suite of peroxy radicals that have been studied to date.

  2. Covalently Bound Nitroxyl Radicals in an Organic Framework

    Energy Technology Data Exchange (ETDEWEB)

    Hughes, Barbara K.; Braunecker, Wade A.; Bobela, David C.; Nanayakkara, Sanjini U.; Reid, Obadiah G.; Johnson, Justin C.

    2016-09-15

    A series of covalent organic framework (COF) structures is synthesized that possesses a tunable density of covalently bound nitroxyl radicals within the COF pores. The highest density of organic radicals produces an electron paramagnetic resonance (EPR) signal that suggests the majority of radicals strongly interact with other radicals, whereas for smaller loadings the EPR signals indicate the radicals are primarily isolated but with restricted motion. The dielectric loss as determined from microwave absorption of the framework structures compared with an amorphous control suggests that free motion of the radicals is inhibited when more than 25% of available sites are occupied. The ability to tune the mode of radical interactions and the subsequent effect on redox, electrical, and optical characteristics in a porous framework may lead to a class of structures with properties ideal for photoelectrochemistry or energy storage.

  3. Comportamento das doenças diarréicas agudas em serviços de saúde de Fortaleza, Ceará, Brasil, entre 1996 e 2001

    OpenAIRE

    Façanha Mônica Cardoso; Pinheiro Alicemaria Ciarlini

    2005-01-01

    Diarréias ainda são importantes causas de mortalidade e morbidade entre as crianças menores de cinco anos de idade. Não são doenças de notificação compulsória e seus números são pouco conhecidos. O objetivo deste estudo é descrever o comportamento das diarréias agudas em Fortaleza, Ceará, Brasil. Entre 1996 e 2001, cem unidades de saúde notificaram diarréias agudas por meio de um formulário padronizado, digitado e analisado por mês, faixa etária, plano de tratamento, local de atendimento e re...

  4. O desafio de diagnosticar tromboembolia pulmonar aguda em pacientes com doença pulmonar obstrutiva crônica The challenge of diagnosing acute pulmonary thromboembolism in patients with chronic obstructive pulmonary disease

    Directory of Open Access Journals (Sweden)

    Sérgio Saldanha Menna-Barreto

    2005-12-01

    Full Text Available Tromboembolia pulmonar aguda e exacerbação aguda de doença pulmonar obstrutiva crônica são doenças comuns. A doença pulmonar obstrutiva crônica é um fator clínico de risco para tromboembolia pulmonar aguda. As apresentações clínicas da tromboembolia pulmonar aguda e da exacerbação aguda da doença pulmonar obstrutiva crônica freqüentemente mimetizam-se tanto que pode ser difícil distingui-las. Anormalidades estruturais nos pulmões com doença pulmonar obstrutiva crônica tornam também difícil a interpretação de testes não invasivos de diagnóstico, como o mapeamento de ventilação e perfusão pulmonares. Assim, diagnosticar tromboembolia pulmonar aguda em pacientes com doença pulmonar obstrutiva crônica é uma tarefa desafiadora. Com o objetivo de atualizar o assunto e oferecer sugestões de conduta, nós avaliamos artigos abordando este tema, incluindo relatos e séries de casos, abordagens diagnósticas de tromboembolia pulmonar aguda e fizemos algumas reflexões. A probabilidade clínica de tromboembolia pulmonar aguda em cenários de doença pulmonar obstrutiva crônica é usualmente intermediária, o mapeamento de ventilação e perfusão pulmonares é predominantemente de probabilidade intermediária e os algoritmos de conduta os deveriam assim considerar.Pulmonary thromboembolism and exacerbation of chronic obstructive pulmonary disease are common conditions. Chronic obstructive pulmonary disease is a clinical risk factor for pulmonary thromboembolism. The presentation of acute pulmonary thromboembolism and acute exacerbation of chronic obstructive pulmonary disease often mimic each other so closely that they cannot be distinguished clinically. The structural abnormalities of the lungs in chronic obstructive pulmonary disease make also difficult to interpret the results of noninvasive tests like ventilation-perfusion lung scans. Therefore, diagnosing acute pulmonary thromboembolism in patients with underlying

  5. Insuficiência respiratória aguda causada por pneumonia em organização secundária à terapia antineoplásica para linfoma não Hodgkin

    OpenAIRE

    Adriell Ramalho Santana; Fábio Ferreira Amorim; Paulo Henrique Alves Soares; Edmilson Bastos de Moura; Marcelo Oliveira Maia

    2012-01-01

    Doenças difusas do parênquima pulmonar pertencem a um grupo de doenças de evolução geralmente subaguda ou crônica, mas que podem determinar insuficiência respiratória aguda. Paciente masculino, 37 anos, em terapia para linfoma não Hodgkin, admitido com tosse seca, febre, dispneia e insuficiência respiratória aguda hipoxêmica. Iniciadas ventilação mecânica e antibioticoterapia, porém houve evolução desfavorável. Tomografia computadorizada de tórax mostrava opacidades pulmonares em "vidro fosco...

  6. Even free radicals should follow some rules: a guide to free radical research terminology and methodology.

    Science.gov (United States)

    Forman, Henry Jay; Augusto, Ohara; Brigelius-Flohe, Regina; Dennery, Phyllis A; Kalyanaraman, Balaraman; Ischiropoulos, Harry; Mann, Giovanni E; Radi, Rafael; Roberts, L Jackson; Vina, Jose; Davies, Kelvin J A

    2015-01-01

    Free radicals and oxidants are now implicated in physiological responses and in several diseases. Given the wide range of expertise of free radical researchers, application of the greater understanding of chemistry has not been uniformly applied to biological studies. We suggest that some widely used methodologies and terminologies hamper progress and need to be addressed. We make the case for abandonment and judicious use of several methods and terms and suggest practical and viable alternatives. These changes are suggested in four areas: use of fluorescent dyes to identify and quantify reactive species, methods for measurement of lipid peroxidation in complex biological systems, claims of antioxidants as radical scavengers, and use of the terms for reactive species.

  7. Radical hysterectomy with adjuvant radiotherapy versus radical radiotherapy for FIGO stage IIB cervical cancer

    International Nuclear Information System (INIS)

    The goal of this study was to compare treatment outcomes for Federation of Gynecology and Obstetrics (FIGO) stage IIB cervical carcinoma patients receiving radical surgery followed by adjuvant postoperative radiotherapy versus radical radiotherapy. Medical records of FIGO stage IIB cervical cancer patients treated between July 2008 and December 2011 were retrospectively reviewed. A total of 148 patients underwent radical hysterectomy with pelvic lymph node dissection followed by adjuvant radiotherapy (surgery-based group). These patients were compared with 290 patients that received radical radiotherapy alone (RT-based group). Recurrence rates, progression-free survival (PFS), overall survival (OS), local control rates, and treatment-related complications were compared for these two groups. Similar rates of recurrence (16.89% vs. 12.41%, p = 0.200), PFS (log-rank, p = 0.211), OS (log-rank, p = 0.347), and local control rates (log-rank, p = 0.668) were observed for the surgery-based group and the RT-based group, respectively. Moreover, the incidence of acute grade 3–4 gastrointestinal reactions and late grade 3–4 lower limb lymphedema were significantly higher for the surgery-based group versus the RT-based group. Cox multivariate analyses found no significant difference in survival outcome between the two groups, and tumor diameter and histopathology were identified as significant prognostic factors for OS. Radical radiotherapy was associated with fewer treatment-related complications and achieved comparable survival outcomes for patients with FIGO stage IIB cervical cancer compared to radical hysterectomy followed by postoperative radiotherapy

  8. Racionalidade e métodos do registro ACCEPT - Registro Brasileiro da Prática Clínica nas Síndromes Coronarianas Agudas da Sociedade Brasileira de Cardiologia

    Directory of Open Access Journals (Sweden)

    Luiz Alberto Piva e Mattos

    2011-08-01

    Full Text Available FUNDAMENTO: Aferição da prática clínica brasileira em pacientes com síndrome coronariana aguda, em hospitais públicos e privados, permitirá identificar os hiatos na incorporação de intervenções clínicas com benefício comprovado. OBJETIVO: Elaborar um registro de pacientes portadores do diagnóstico de síndrome coronariana aguda para aferir dados demográficos, morbidade, mortalidade e prática padrão no atendimento desta afecção. Ademais, avaliar a prescrição de intervenções baseadas em evidências, como a aspirina, estatinas, betabloqueadores e reperfusão, dentre outras. MÉTODOS: Estudo observacional do tipo registro, prospectivo, visando documentar a prática clínica hospitalar da síndrome coronária aguda, efetivada em hospitais públicos e privados brasileiros. Adicionalmente, serão realizados seguimento longitudinal até a alta hospitalar e aferição da mortalidade e ocorrência de eventos graves aos 30 dias, 6 e 12 meses. RESULTADOS: Os resultados serão apresentados um ano após o início da coleta (setembro de 2011 e consolidados após a reunião da população e dos objetivos posteriormente almejados. CONCLUSÃO: A análise desse registro multicêntrico permitirá projetar uma perspectiva horizontal do tratamento dos pacientes acometidos da síndrome coronariana aguda no Brasil.

  9. Spectroscopy of free radicals and radical containing entrance-channel complexes in superfluid helium nano-droplets

    CERN Document Server

    K"upper, J; K\\"upper, Jochen; Merritt, Jeremy M.

    2006-01-01

    The spectroscopy of free radicals and radical containing entrance-channel complexes embedded in superfluid helium nano-droplets is reviewed. The collection of dopants inside individual droplets in the beam represents a micro-canonical ensemble, and as such each droplet may be considered an isolated cryo-reactor. The unique properties of the droplets, namely their low temperature (0.4 K) and fast cooling rates ($\\sim10^{16}$ K s$^{-1}$) provides novel opportunities for the formation and high-resolution studies of molecular complexes containing one or more free radicals. The production methods of radicals are discussed in light of their applicability for embedding the radicals in helium droplets. The spectroscopic studies performed to date on molecular radicals and on entrance / exit-channel complexes of radicals with stable molecules are detailed. The observed complexes provide new information on the potential energy surfaces of several fundamental chemical reactions and on the intermolecular interactions pres...

  10. Studies of radiation-produced radicals and radical ions. Progress report, September 1, 1982-August 31, 1983

    International Nuclear Information System (INIS)

    During the past year, radiation chemical and solid-state ESR techniques were combined to generate and characterize novel radical ions. Observations have been made on a variety of metastable organometallic radical cations derived from Group IV B metal alkyls. Matrix interactions have been discovered between radical cations and the Freon solvent. The radical cation formed from ethylene oxide is the ring-opened 2-oxa-trimethylene cation with a symmetrical C/sub 2v/ planar structure. The CF3CCl2 radical was formed after γ irradiation of the CF3CCl3 (Freon) matrix. Very large long-range proton hyperfine couplings were found in radical cations of carbonyl compounds. The C8F8- ion was studied in MTHF glass, using ESR. Two new inorganic radicals, SF4- and SF4O-, were discovered

  11. Intercambio gaseoso en el síndrome de dificultad respiratoria aguda Gas exchange in acute respiratory distress syndrome

    Directory of Open Access Journals (Sweden)

    G. A. Raimondi

    2003-04-01

    Full Text Available El síndrome de dificultad respiratoria aguda (ARDS se caracteriza por presentar alteraciones severas del intercambio gaseoso (IG causadas por «shunt» e importante irregularidad de la ventilación perfusión (V A/Q. Esto es consecuencia del edema intersticial y el colapso y ocupación alveolar. Además de la fracción inspirada de oxígeno y la evolución de la patología pulmonar, hay distintas variables que son capaces de alterar la presión parcial de oxígeno arterial (PaO2. Es así que los cambios del volumen minuto circulatorio, la concentración de hemoglobina, el consumo de oxígeno o la alcalosis pueden modificar la PaO2 a través de su influencia en la PO2 de sangre venosa mixta. A pesar de la influencia de estas diferentes variables, la anormalidad del IG se ha podido analizar adecuadamente por medio de la técnica de eliminación de múltiples gases inertes (MIGET. Asimismo, se han descripto diversas estrategias ventilatorias (presión positiva de fin de espiración, relaciones inspiratorias-espiratorias invertidas, volúmenes corrientes elevados, etc. que producen mejoría del IG principalmente a través del aumento de la presión media en la vía aérea al reclutar áreas pulmonares previamente colapsadas. También el cambio de decúbito a posición ventral, por modificaciones en la distribución de presión pleural regional, disminuye el colapso alveolar con mejoría de la PaO2. Asimismo hay distintas intervenciones farmacológicas capaces de mejorar el IG tales como la administración de óxido nítrico (ON o de prostaglandinas (PGI2 o PGE1 por vía inhalatoria. Estas producen vasodilatación de las áreas bien ventiladas aumentando el flujo cardíaco a ese nivel y disminuyendo relativamente el flujo por las áreas de «shunt». La almitrina endovenosa, droga vasoconstrictora pulmonar, mejora el IG al aumentar la vasoconstricción hipóxica. Se ha demostrado efecto aditivo de la almitrina con la inhalación de ON. A pesar del

  12. Spectroscopy of free-base N-confused tetraphenylporphyrin radical anion and radical cation.

    Science.gov (United States)

    Alemán, Elvin A; Manríquez Rocha, Juan; Wongwitwichote, Wongwit; Godínez Mora-Tovar, Luis Arturo; Modarelli, David A

    2011-06-23

    The radical anions and radical cations of the two tautomers (1e and 1i) of 5,10,15,20-tetraphenyl N-confused free-base porphyrin have been studied using a combination of cyclic voltammetry, steady state absorption spectroscopy, and computational chemistry. N-Confused porphyrins (NCPs), alternatively called 2-aza-21-carba-5,10,15,20-tetraphenylporphyrins or inverted porphyrins, are of great interest for their potential as building blocks in assemblies designed for artificial photosynthesis, and understanding the absorption spectra of the corresponding radical ions is paramount to future studies in multicomponent arrays where electron-transfer reactions are involved. NCP 1e was shown to oxidize at a potential of E(ox) 0.65 V vs Fc(+)|Fc in DMF and reduce at E(red) -1.42 V, while the corresponding values for 1i in toluene were E(ox) 0.60 V and E(red) -1.64 V. The geometries of these radical ions were computed at the B3LYP/6-31+G(d)//B3LYP/6-31G(d) level in the gas phase and in solution using the polarizable continuum model (PCM). From these structures and that of H(2)TPP and its corresponding radical ions, the computed redox potentials for 1e and 1i were calculated using the Born-Haber cycle. While the computed reduction potentials and electron affinities were in excellent agreement with the experimental reduction potentials, the calculated oxidation potentials displayed a somewhat less ideal relationship with experiment. The absorption spectra of the four radical ions were also measured experimentally, with radical cations 1e(•+) and 1i(•+) displaying significant changes in the Soret and Q-band regions as well as new low energy absorption bands in the near-IR region. The changes in the absorption spectra of radical anions 1e(•-) and 1i(•-) were not as dramatic, with the changes occurring only in the Soret and Q-band regions. These results were favorably modeled using time-dependent density functional calculations at the TD-B3LYP/6-31+G(d)//B3LYP/6-31G

  13. Intoxicação experimental aguda por Senecio brasiliensis em ovinos e indução de resistência à intoxicação

    Directory of Open Access Journals (Sweden)

    Fabiane B. Grecco

    2012-09-01

    Full Text Available Ovinos são mais resistentes à intoxicação por Senecio spp. que bovinos e equinos. Para determinar se essa resistência é induzida pela ingestão de pequenas e repetidas doses da planta e se essa resistência é duradoura, foram realizados três experimentos com folhas e talos verdes de Senecio brasilienses. Para determinar a dose mínima que causa intoxicação aguda (experimento 1, foram administradas doses únicas de 60, 80, 90, 100 e 100g/kg de peso corporal (pc a cinco ovinos, respectivamente. Os animais que receberam 60 e 80 g/kg de pc de S. brasiliensis não adoeceram, porém o ovino que recebeu 80g/kg de pc apresentava fibrose e megalocitose discretas nas biópsias realizadas aos 90, 120 e 150 dias do término da administração da planta. Os ovinos que receberam 90 e 100g/kg de pc apresentaram anorexia, prostração, movimentos de pedalagem, dor abdominal e morte 12-48 horas após o aparecimento dos sinais clínicos. Na necropsia havia ascite, petéquias disseminadas e acentuação do padrão lobular hepático. Histologicamente havia necrose hemorrágica centro-lobular. No Experimento 2 a dose capaz de causar a intoxicação aguda foi fracionada e administrada em duas, cinco e 10 doses diárias para 3 ovinos, respectivamente. A dose tóxica fracionada não provocou sinais clínicos de intoxicação em nenhum dos ovinos, porém havia fibrose periportal e megalocitose moderadas nas biopsias realizadas aos 60 dias do término da administração da planta, as quais não evoluíram. O ovino que recebeu a dose fracionada em 10 administrações não apresentou lesões histológicas nas biópsias. Para determinar se os ovinos tornam-se resistentes à forma aguda da intoxicação (experimento 3, foram administradas doses diárias de 15g/kg de pc por 30 dias e 30g/kg de pc por 10 dias a quatro ovinos. No dia seguinte à última administração dois ovinos receberam a dose única de 100g/kg de pc de S. brasiliensis, mas não adoeceram nem

  14. Caracterización de leucemias agudas en adultos por citogenética convencional y FISH (hibridización in situ por fluorescencia

    Directory of Open Access Journals (Sweden)

    Gabriel Bedoya Berrío

    2000-02-01

    Full Text Available

    Introducción: En la actualidad se ha establecido el componente genético de numerosas neoplasias y en varias de ellas las alteraciones cromosómicas se reconocen como un elemento crítico en su patogénesis, modificando el funcionamiento de algunos oncogenes. En relación con las leucemias, las alteraciones citogenéticas que sirven como marcadores de las mismas, pueden presentarse tanto en el número como en la estructura cromosómica . Para detectar los cambios cromosómicos asociados con cáncer, las células afectadas deben ser analizadas por cariotipo, mediante técnicas convencionales de bandeo las cuales permiten, en la mayoría de los casos, identificar las alteraciones presentes. Sin embargo, en algunas situaciones donde no es posible identificar dichas alteraciones, es necesario emplear técnicas moleculares. La hibridizacion in situ por fluorescencia (FISH, técnica que combina la citogenética y la genética molecular, utiliza sondas de DNA marcadas con fluorocromos y sirve tanto para el estudio de alteraciones cromosómicas numéricas y estructurales, como para identificar los genes involucrados en ellas. En conclusión, el aporte más significativo de la citogenética lo constituye el haber demostrado alteraciones cromosómicas específicas en las neoplasias, las cuales son de gran utilidad para establecer un diagnóstico y un posible curso y pronóstico de la enfermedad.

    Objetivo: Analizar las alteraciones cromosómicas encontradas en pacientes adultos con diagnóstico clínico de leucemia linfoide o mieloide aguda, utilizando técnicas de citogenética clásica y molecular (FISH. Población de estudio: se analizarán las muestras de médula ósea de

  15. Intoxicação experimental aguda por samambaia (Pteridium aquilinum em bovinos Experimental acute poisoning by bracken fern (Pteridium aquilinum in cattle

    Directory of Open Access Journals (Sweden)

    Bruno L. Anjos

    2009-09-01

    Full Text Available Este experimento foi delineado para investigar os seguintes pontos em relação à intoxicação aguda por samambaia (Pteridium aquilinum em bovinos: 1 a intensidade da trombocitopenia em diferentes momentos da intoxicação e sua relação com possíveis déficits na hemostasia secundária, 2 a relação da neutropenia com as manifestações morfológicas de septicemia ocasionalmente observadas na necropsia, e 3 o mecanismo da anemia e sua relação com a perda de sangue, a vida média eritróide e a evolução da doença. As hastes superiores mais verdes de P. aquilinum foram administradas a quatro bovinos sem raça definida, com idade média de 1,5 ano e pesos entre 190-215 kg. Um bovino de idade e peso semelhantes foi usado como controle e, exceto por não ter recebido P. aquilinum, foi mantido nas mesmas condições que os outros quatro. Os quatro bovinos que receberam a planta morreram com quadro característico da intoxicação aguda por samambaia após receberem durante 53-58 dias, doses diárias de 8,0, 8,6, 10,2 e 10,6g/kg de peso corporal, que totalizaram, ao final do experimento, respectivamente, 112,7, 107,6, 85,7, 90,15 kg da planta, o que corresponde, respectivamente, a 59,3%, 63,3%, 47,4%, 47,5% da planta em relação ao peso dos bovinos. A doença caracterizou-se por febre de até 42,5°C e diversos graus de hemorragias observadas clinicamente, na necropsia e na histopatologia. A morte ocorria 6-7 dias após o início do quadro febril. As alterações hematológicas revelaram trombocitopenia e neutropenia acentuadas. Em dois dos quatro bovinos havia anemia leve. Não houve variações significativas nos tempos de coagulação dos bovinos intoxicados, quando avaliados os fatores de coagulação (secundária, excluindo-se assim a possibilidade da participação de distúrbios da hemostasia secundária na patogênese das hemorragias nessa intoxicação. A determinação dos produtos da degradação da fibrina no soro revelou dados

  16. Mixed views about radical life extension

    Directory of Open Access Journals (Sweden)

    Allen Alvarez

    2015-05-01

    Full Text Available Background: Recent studies on public attitudes toward life extension technologies show a mix of ambivalence toward and support for extending the human lifespan (Partridge 2009; Dragojlovic 2013; Funk et al. 2013. Attitudes toward genetic modification of organisms and technological enhancements may be used to categorize individuals according to political or ideological orientation such as technoprogressive or conservative (Hughes 2010 and it could be easy to assume that these categories are related to more general categorizations related to culture, e.g. between Traditional and Secular-rational values in the World Values Survey (Ingelhart & Welzel 2010. This paper discusses how attitudes toward aspects of radical life extension may be related to cultural values as revealed in an online deliberative survey among university students conducted between January 2012 to January 2013. Survey results suggest that attitudes toward radical life extension tend to be mixed among groups categorized as Traditional, Secular-rational, Survivalist, and Self-expressionist. The study explored the relation between responses of 326 university students to 5 key questions on radical life extension (RLE and the cultural values they tend to favor as indicated by their response to 20 statements from the World Values Survey. Design and Method: The survey consisted of 3 stages: an online pre-discussion survey, face-to-face discussion, and post-discussion survey. After completing the 5 main survey questions in stage 1, participants were presented two additional questionnaires: one on cultural attitudes using 20 statements from the 2004-2008 World Values Survey (WVS and another on health attitudes with 12 statements from Dutta-Bergman’s 2004 study. In stage 2, participants were engaged in a face-to-face discussion in class focusing on their responses to the five key questions. After the discussion, they were invited to reconsider the choices and reasons they posted in stage

  17. RISE OF RADICALIZATION IN THE GLOBAL VILLAGE. ONLINE RADICALIZATION VS. IN-PERSON RADICALIZATION - IS THERE A DIFFERENCE?

    Directory of Open Access Journals (Sweden)

    Tanja Dramac Jiries

    2016-03-01

    Full Text Available In the vicinity of open space, some authors have called the “dark web” the perfect “breeding grounds” for generating conditions for seeds of extremism to thrive and grow. The perceived anonymity and vast information databases found here present a perfect incubator for terrorist activity. Academics and policymakers alike are as well convinced that such an open space filled with recruiter masterminds is perfectly adept at embracing the unadoptable, unconventional, or socially unfit into terrorist or jihadi organizations. Nevertheless, regardless of organizations, modernization and adoption of new technological methods in which one can obtain ideas and information, many individuals are still and to a great extent, influenced by face-to-face interactions. Intimate environments of a religious institution, somewhat of a home-like feeling in community gathering center, can equally impact a person, as can the internet and its vast informational influence. For the reason of contributing to understand the radicalization in the Global Village, this article will examine differences in online and in-person radicalization and illustrate it with some examples and attempt to make a comparison between two different exposures to information and its effects on young individuals.

  18. Isoprene, sulphoxy radical-anions and acidity

    Directory of Open Access Journals (Sweden)

    K. J. Rudziński

    2008-12-01

    Full Text Available Transformation of isoprene coupled with autoxidation of SIV in aqueous solutions was studied experimentally and by chemical-kinetic modelling over broad range of solution acidities (pH=3–9 to complement the research on aqueous-phase and heterogeneous transformation of isoprene reported recently by many laboratories. Isoprene significantly slowed down the autoxidation in acidic and basic solutions, and accelerated it slightly in neutral solutions. Simultaneously, production of sulphate ions and formation of solution acidity were significantly reduced. Formation of sulphite and sulphate derivatives of isoprene – sulphurous acid mono-(2-methyl-4-oxo-but-2-enyl ester (m/z=162.9, sulphurous acid mono-(4-hydroxy-2-methyl-but-2-enyl ester (m/z=164.9, sulphuric acid mono-(2-methyl-4-oxo-but-2-enyl ester (m/z=178.9, sulphuric acid mono-(4-hydroxy-2-methyl-but-2-enyl ester (m/z=180.9 – was indicated by mass spectroscopic analysis of post-reaction mixtures. The results of experiments were explained by changes in a subtle quantitative balance of three superimposed processes whose rates depended in different manner on the acidity of reacting solutions – the scavenging of sulphoxy radicals by isoprene, the formation of sulphoxy radicals during further reactions of isoprene radicals, and the autoxidation of SIV itself. A chemical mechanism based on this idea was explored numerically to show good agreement with experimental data. Interaction of isoprene with sulphur(IV species and oxygen can possibly result in formation of new organosulphate components of atmospheric aerosols and waters, and influence distribution of reactive sulphur and oxygen species in isoprene-emitting organisms exposed to SIV pollutants.

  19. Key contributors: Ernst von Glasersfeld's radical constructivism

    Science.gov (United States)

    Tobin, Kenneth

    2007-07-01

    This article reviews the significance of the contributions of Ernst von Glasersfeld to research in science education, especially through his theoretical contributions on radical constructivism. As a field shaper, Glasersfeld's subversive ideas catalyzed debate in the science education community and fuelled transformation of many facets including research methods, ways of thinking about teaching and learning, curriculum, and science teacher education. Perturbations emanating from the debates on constructivism forged new pathways that led to the development and use of many of the sociocultural frameworks employed by authors in Cultural Studies of Science Education.

  20. [URINARY DISCOMFORTS IN PATIENTS AFTER RADICAL PROSTATECTOMY].

    Science.gov (United States)

    Al'-Shukri, S Kh; Ananiĭ, I A; Amdiĭ, R E; Kuz'min, I V

    2015-01-01

    The authors showed the result of complication treatment of lower urinary tracts in 128 patients with localized prostate cancer. The patients underwent radical prostatectomy. Urinary discomforts included enuresis, urinary incontinence in postoperative period. Abnormalities of urine outflow due to urethral stricture were revealed in 6 (4,6%) patients by the 6 month after operation. These complications required surgical treatment. Urinary incontinence was noted in 20 (15,6%) patients in this period. It was stressful urinary incontinence in 16 (12,6%) and urgent - in 4 (3%). Patents with stressful urinary difficulty were advised to use the conservative treatment (pelvic floor muscle training and electrostimulation), but in case of inefficiency - surgical treatment.

  1. Autoethnographic Mother-Writing: Advocating Radical Specificity

    Directory of Open Access Journals (Sweden)

    Patty Sotirin

    2010-01-01

    Full Text Available In considering the similarities between "momoirs"--popular memoirs written by mothers about motherhood experiences--and evocative autoethnographic mother-writing, I argue that differentiating these two forms of intimate observation and personal narrative requires a rethinking of autoethnographic practice. Specifically, I draw on the work of Gilles Deleuze to advocate for a radical specificity in autoethnographic writing. Thinking the autoethnographic narrative in terms of specificities and differences encourages us to think creatively about personal experiences and cultural relations beyond what is shared and communicable.

  2. Radical Nature of C-Lignin

    Energy Technology Data Exchange (ETDEWEB)

    Berstis, Laura; Elder, Thomas; Crowley, Michael; Beckham, Gregg T.

    2016-10-03

    The recently discovered lignin composed of caffeoyl alcohol monolignols or C-lignin is particularly intriguing given its homogeneous, linear polymeric structure and exclusive benzodioxane linkage between monomers. By virtue of this simplified chemistry, the potential emerges for improved valorization strategies with C-lignin relative to other natural heterogeneous lignins. To better understand caffeoyl alcohol polymers, we characterize the thermodynamics of the radical recombination dimerization reactions forming the benzodioxane linkage and the bond dissociation into radical monolignol products. These properties are also predicted for the cross-coupling of caffeoyl alcohol with the natural monolignols, coniferyl alcohol, sinapyl alcohol, and p-coumaryl alcohol, in anticipation of polymers potentially enabled by genetic modification. The average BDEs for the C-lignin benzodioxane ..alpha..- and ..beta..-bonds are 56.5 and 63.4 kcal/mol, respectively, with similar enthalpies for heterodimers. The BDE of the ..alpha..-bond within the benzodioxane linkage is consistently greater than that of the ..beta..-bond in all dimers of each stereochemical arrangement, explained by the ability the ..alpha..-carbon radical generated to delocalize onto the adjacent phenyl ring. Relative thermodynamics of the heterodimers demonstrates that the substituents on the phenyl ring directly neighboring the bond coupling the monolignols more strongly impact the dimer bond strengths and product stability, compared to the substituents present on the terminal phenyl ring. Enthalpy comparisons furthermore demonstrate that the erythro stereochemical configurations of the benzodioxane bond are slightly less thermodynamically stable than the threo configurations. The overall differences in strength of bonds and reaction enthalpies between stereoisomers are generally found to be insignificant, supporting that postcoupling rearomatization is under kinetic control. Projecting the lowest

  3. Rehabilitation of erectile function following radical prostatectomy

    Institute of Scientific and Technical Information of China (English)

    Andrew R. McCullough

    2008-01-01

    The concept of muscle rehabilitation after nerve injury is not a novel idea and is practiced in many branches of medicine, including urology. Bladder rehabilitation after spinal cord injury is universally practiced. The erectile dysfunction (ED) experienced after radical prostatectomy (RP) is increasingly recognized as being primarily neurogenic followed by secondary penile smooth muscle (SM) changes. There is unfortunately no standard approach to penile rehabilitation after RP because controlled prospective human studies are not available. This article reviews the epidemiology, experimental pathophysiological models, rationale for penile rehabilitation, and currently published rehabilitation strategies.

  4. Superzoom. Italia y el compromiso radical

    OpenAIRE

    Parga Prado, Marcos

    2015-01-01

    Italy: the new domestic landscape, la ambiciosa exposición que en 1972 tuvo lugar en el MoMA, supone la consagración y a la vez escenifica la muerte de lo que algunos críticos acababan de catalogar como Arquitectura Radical, término con el que intentaban unificar el trabajo de un heterogéneo y atomizado grupo de arquitectos, principalmente italianos, comprometidos con el replanteamiento total de la definición y objetivos de la disciplina. Se ponía fin así a un corto pero intenso periodo d...

  5. Resonance Raman study of benzyl radical

    DEFF Research Database (Denmark)

    Langkilde, F.W.; Bajdor, K.; Wilbrandt, R.

    1992-01-01

    Time-resolved resonance Raman spectra are obtained of benzyl radicals created by laser flash photolysis of benzylchloride and diphenylacetone in solution. The spectra are obtained in resonance with the intense 2 2A2-1 B-2(2) transition of benzyl. The strong Raman bands are assigned to totally...... symmetric a1 modes. The remaining observed bands are tentatively assigned to fundamental modes of b1, a2, and b2 symmetry, and to overtones and combinations. The resonance Raman spectra are found to be quite different from previous fluorescence spectra of benzyl, and the origins of these differences are...

  6. Acetyl radical generation in cigarette smoke: Quantification and simulations

    Science.gov (United States)

    Hu, Na; Green, Sarah A.

    2014-10-01

    Free radicals are present in cigarette smoke and can have a negative effect on human health. However, little is known about their formation mechanisms. Acetyl radicals were quantified in tobacco smoke and mechanisms for their generation were investigated by computer simulations. Acetyl radicals were trapped from the gas phase using 3-amino-2, 2, 5, 5-tetramethyl-proxyl (3AP) on solid support to form stable 3AP adducts for later analysis by high-performance liquid chromatography (HPLC), mass spectrometry/tandem mass spectrometry (MS-MS/MS) and liquid chromatography-mass spectrometry (LC-MS). Simulations were performed using the Master Chemical Mechanism (MCM). A range of 10-150 nmol/cigarette of acetyl radical was measured from gas phase tobacco smoke of both commercial and research cigarettes under several different smoking conditions. More radicals were detected from the puff smoking method compared to continuous flow sampling. Approximately twice as many acetyl radicals were trapped when a glass fiber particle filter (GF/F specifications) was placed before the trapping zone. Simulations showed that NO/NO2 reacts with isoprene, initiating chain reactions to produce hydroxyl radical, which abstracts hydrogen from acetaldehyde to generate acetyl radical. These mechanisms can account for the full amount of acetyl radical detected experimentally from cigarette smoke. Similar mechanisms may generate radicals in second hand smoke.

  7. Lipid radicals: Properties and detection by spin trapping

    International Nuclear Information System (INIS)

    Unsaturated lipids are rapidly oxidized to toxic products such as lipid hydroperoxides, especially when transition metals such as iron or copper are present. In a Fenton-type reaction Fe2+ converts lipid hydroperoxides to the very short-lived lipid alkoxyl radicals. The reaction was started upon the addition of Fe2+ to an aqueous linoleic acid hydroperoxide (LOOH) emulsion and the spin trap in the absence of oxygen. Even when high concentrations of spin traps were added to the incubation mixture, only secondary radical adducts were detected, probably due to the rapid rearrangement of the primary alkoxyl radicals. With the commercially available nitroso spin trap MNP we observed a slightly immobilized ESR spectrum with only one hydrogen splitting, indicating the trapping of a methinyl fragment of a lipid radical. With DMPO or 5-diethoxyphosphoryl-5-methyl-1-pyrroline N-oxide (DEPMPO) adducts were detected with carbon-centered lipid radical, with acyl radical, and with the hydroxyl radical. We also synthesized lipophilic derivatives of the spin trap DEPMPO in order to detect lipid radical species generated in the lipid phase. With all spin traps studied a lipid-derived carbon-centered radical was obtained in the anaerobic incubation system Fe2+/LOOH indicating the trapping of a lipid radical, possibly generated as a secondary reaction product of the primary lipid alkoxyl radical formed. Under aerobic conditions an SOD-insensitive oxygen-centered radical adduct was formed with DEPMPO and its lipophilic derivatives. The observed ESR parameters were similar to those of alkoxyl radical adducts, which were independently synthesized in model experiments using Fe3+-catalyzed nucleophilic addition of methanol or t-butanol to the respective spin trap. (author)

  8. Utilização de terapêuticas comprovadamente úteis no tratamento da coronariopatia aguda: comparação entre diferentes regiões brasileiras. Análise do Registro Brasileiro de Síndromes Coronarianas Agudas (BRACE - Brazilian Registry on Acute Coronary Syndromes

    Directory of Open Access Journals (Sweden)

    José Carlos Nicolau

    2012-04-01

    Full Text Available FUNDAMENTO: Pouco se sabe, em nosso meio, sobre diferenças regionais no tratamento da coronariopatia aguda. OBJETIVO: Analisar o comportamento regional relativamente à utilização de terapêuticas comprovadamente úteis na coronariopatia aguda. MÉTODOS: Foram selecionados aleatoriamente 71 hospitais, respeitando-se a proporcionalidade do país em relação à localização geográfica, entre outros critérios. Na população global, foi analisada regionalmente a utilização de AAS, clopidogrel, inibidor da ECA/bloqueador de AT1, betabloqueador e estatina, isoladamente e agrupados por escore individual que variou de 0 (nenhum medicamento utilizado a 100 (todos utilizados. No infarto com supradesnivelamento de ST (IAMCSST foram analisadas diferenças regionais sobre utilização de terapêuticas de recanalização (fibrinolíticos e angioplastia primária. RESULTADOS: No global da população, nas primeiras 24 horas de hospitalização, a média de escore na região Norte-Nordeste (70,5 ± 22,1 foi menor (p < 0,05 do que nas regiões Sudeste (77,7 ± 29,5, Centro-Oeste (82 ± 22,1 e Sul (82,4 ± 21. Por ocasião da alta, o escore da região Norte-Nordeste (61,4 ± 32,9 foi menor (p < 0,05 do que nas regiões Sudeste (69,2 ± 31,6, Centro-Oeste (65,3 ± 33,6, e Sul (73,7 ± 28,1; adicionalmente, o escore do Centro-Oeste foi menor (p < 0,05 do que o do Sul. No IAMCSST, o uso de terapêuticas de recanalização foi maior no Sudeste (75,4%, p = 0,001 em relação ao restante do país, e menor no Norte-Nordeste (52,5%, p < 0,001 em relação ao restante do país. CONCLUSÃO: O uso de terapêuticas comprovadamente úteis no tratamento da coronariopatia aguda está aquém do desejável no país, com importantes diferenças regionais.

  9. Desfechos clínicos aos 30 dias do registro brasileiro das síndromes coronárias agudas (ACCEPT

    Directory of Open Access Journals (Sweden)

    Luiz A lberto Piva e Mattos

    2013-01-01

    Full Text Available FUNDAMENTO: São escassos os registros documentando a prática clínica brasileira na vigência de uma síndrome coronária aguda. OBJETIVOS: Descrição da demografia, ocorrência de desfechos graves e análise comparativa dentre aqueles que efetivaram ou não uma estratégia invasiva (cinecoronariografia e revascularização miocárdica em um registro brasileiro multicêntrico de portadores de uma síndrome coronária aguda. MÉTODOS: O registro ACCEPT/SBC coletou prospectivamente, em 47 centros hospitalares brasileiros, pacientes na vigência de uma síndrome coronária aguda. Apresentamos a ocorrência de desfechos clínicos graves, de modo integral, e de acordo com a submissão ou não a um procedimento de revascularização do miocárdio ao final dos primeiros 30 dias de seguimento. RESULTADOS: De agosto de 2010 até dezembro de 2011, 2.485 pacientes foram incluídos neste registro. Destes, 31,6% eram portadores de angina instável e 34,9% e 33,4%, com síndrome sem e com supradesnível do segmento ST. Aos 30 dias, a submissão a procedimento de revascularização do miocárdio foi progressivamente maior de acordo com a gravidade da apresentação clínica (38,7% versus 53,6% versus 77,7%; p < 0,001. A ocorrência de mortalidade cardíaca, dentre aqueles submetidos ou não à revascularização miocárdica, foi de 1,0% versus 2,3% (p = 0,268, 1,9% versus 4,2% (p = 0,070 e 2,0% versus 8,1% (p < 0,001, angina instável, síndrome sem e com supradesnível do segmento ST, respectivamente. CONCLUSÕES: A prescrição de revascularização do miocárdio foi progressivamente mais frequente de acordo com a gravidade da apresentação clínica; naqueles atendidos na vigência de síndrome coronária sem e com supradesnível do segmento ST, promoveu tendência e redução significativa da mortalidade, aos 30 dias, respectivamente.

  10. Neurocisticercose com quadro clínico inicial de meningite aguda Twenty seven cases of neurocysticercosis with clinical picture of acute meningitis

    Directory of Open Access Journals (Sweden)

    Ana Maria Bonametti

    1994-02-01

    Full Text Available São apresentados 27 casos de neurocisticercose, com quadro clínico inicial de meningite aguda, atendidos no Hospital Universitário Regional do Norte do Paraná (HURNP - Universidade Estadual de Londrina. Vinte (74,1% pacientes eram do sexo masculino; a idade variou de 4 a 52 anos (23,6 ± 11,7 anos; 11 tinham menos de 20 anos, 10 tinham entre 21 e 30 anos e 6, mais de 30 anos. O diagnóstico etiológico foi estabelecido pela reatividade no líquido cefalorraquidiano (LCR do teste de fixação do complemento (Weinberg em 17 pacientes e pelo imunoenzimático (ELISA para cisticercose em 10. Em 6 pacientes foi realizada tomografia computadorizada de crânio, todas com alterações sugestivas de neurocisticercose. No LCR colhido na admissão, em 21 (77,78% pacientes havia predomínio de linfócitos/monócitos e em 6 (22,2%, predomínio de neutrófilos. A presença de eosinófilos, possibilitando a suspeita de neurocisticercose, só ocorreu na primeira amostra de LCR em 7 casos; desses, 4 casos a pleocitose era linfomonocitária e 3 era neutrofilica. Hiperproteinorraquia e hipoglicorraquia no LCR colhido na admissão foram observadas em 18 (66,6% e 6 (22,2% pacientes, respectivamente. Nos doentes em que não havia eosinófilos no LCR colhido na admissão, o diagnóstico inicial foi de meningite linfomonocitária de etiología presumivelmente viral ou de meningite purulenta. O tratamento da meningite aguda por neurocisticercose foi realizado com dexametasona e houve desaparecimento dos sintomas e sinais. Não houve óbito em nenhum caso. Os autores ressaltam a importância de incluir a neurocisticercose no diagnóstico diferencial das meningites agudas, em áreas endêmicas para essa doença, assim como realizar rotineiramente em todas as amostras de LCR colhidas de pacientes atendidos o teste ELISA para cisticercose.Twenty seven cases of neurocysticercosis, with clinical picture of acute meningitis, are described. Twenty (74.1% patients are male

  11. Apendicite aguda isquêmica em coelhos: um novo modelo com estudo histopatológico Acute ischaemic appendicitis in rabbits: new model with histopathological study

    Directory of Open Access Journals (Sweden)

    Fernando Costa Nunes

    2004-06-01

    Full Text Available OBJETIVO: Avaliar a isquemia parcial ou total do apêndice vermiforme de coelhos, através da ligadura com fio inabsorvível dos vasos do meso apêndice bem como a obstrução mecânica, através da ligadura com fio inabsorvível da base do apêndice a 1 cm do ceco, na patogênese da apendicite aguda. Avaliar a histologia do apêndice (normal e acometido. Estudar a flora bacteriana residente no apêndice vermiforme (normal e acometido e do exsudato peritoneal. MÉTODO: Foram utilizados 72 coelhos (Oryctogalus cuniculos, machos, da linhagem Nova Zelândia, com peso médio de 3.000 gramas. Foram divididos em grupos: piloto (A, flora bacteriana (B, controle (H e experimento (C, D, E, F e G com períodos de observação de 96 horas e 192 horas. Fez-se a ligadura dos vasos do meso apêndice com fio inabsorvível nos grupos (D, E, F e G e da base do apêndice vermiforme a 1 cm do ceco, no grupo (C. No grupo experimento (D, E, F e G foi praticado o modelo isquêmico. No grupo experimento (C foi realizada a obstrução mec��nica e no grupo controle (H foi feita somente a simulação da cirurgia. RESULTADOS: Ocorreu apendicite aguda no grupo experimento (C,D,E,F, e G. CONCLUSÕES: O método utilizado causa apendicite aguda com alterações anatomopatológicas distintas. A bactéria residente encontrada na flora fisiológica do suco entérico do apêndice vermiforme e no exsudato peritoneal foi Escherichia coli.BACKGROUND: To evaluate partial or total ischemia, through ligature with an unabsorbed thread of vessels from the vermiform appendix of rabbits, as well as the mechanical obstruction, through ligature with an unabsorbed thread at the basis of the vermiform appendix, at 1 cm from the cecum, in the pathogenesis of acute appendicitis. To evaluate the histology of the appendix (normal and affected. To study the resident bacterium flora in the appendix (normal and affected and the peritonitis exudate. METHODS: Seventy- two male rabbits (Oryctogalus

  12. Inalação contínua com fenoterol na criança com asma aguda grave: efeitos clínicos imediatos

    Directory of Open Access Journals (Sweden)

    Zanoni Lourdes Z.

    2002-01-01

    Full Text Available Objetivos: avaliar as alterações da freqüência cardíaca, da pressão arterial, do psiquismo e da saturação arterial de oxigênio, após a inalação contínua com fenoterol, na criança com asma aguda grave. Casuística e Métodos: foram estudados 30 pacientes com asma aguda grave, atendidos no PAM-Pediatria do Hospital Universitário - UFMS. Os pacientes receberam inalação contínua durante uma hora, com 0,5 mg/kg (2 gotas/kg de fenoterol. O psiquismo, a saturação arterial de oxigênio, a freqüência cardíaca e a pressão arterial foram avaliados antes, imediatamente após, e uma hora após a inalação com fenoterol. Resultados: 17 crianças eram do sexo masculino (56,6%, e 13 do sexo feminino (43,4%. Foi observado sonolência em 16 (53,3%, agitação psicomotora em 1 (3,3%, náusea e vômito em 12 pacientes (40%. A média da saturação arterial de oxigênio aumentou de 90,9 2,8% para 92,7 2,5% (p<0,05 após a inalação. Houve um aumento estatisticamente significativo da média da freqüência cardíaca do início da inalação ao término da mesma (139,5 13,5 bpm, 166,5 11,1bpm, respectivamente p<0,05. A média da pressão arterial era de 117,56 10,3 / 74,6 7 mmHg antes da inalação, e ocorreu diminuição ao final da inalação, atingindo valores médios de 107,6 11 / 63,6 9,3 mmHg (p<0,05. Conclusões: a inalação contínua com fenoterol na dose de 0,5 mg/kg, na criança com asma aguda grave, desencadeou sonolência, náusea, vômitos, taquicardia e diminuição da pressão arterial. Os autores sugerem que esta modalidade de tratamento seja realizada com monitorização clínica, em ambiente hospitalar, merecendo atenção especial aquelas crianças com doenças concomitantes, nas quais os efeitos sistêmicos da terapia poderiam ser potencializados pelas doenças subjacentes.

  13. Comparação do corticoide inalatório e oral no tratamento da disfonia aguda Use of inhaled versus oral steroids for acute dysphonia

    Directory of Open Access Journals (Sweden)

    Andréa Moreira Veiga de Souza

    2013-04-01

    Full Text Available A disfonia aguda é um quadro comum na prática clínica. Seu tratamento, principalmente em adultos, não é bem definido na literatura. O corticoide é o tratamento medicamentoso mais recomendado. Os estudos existentes, entretanto, não são suficientes para a determinação da superioridade entre diferentes corticoides e a melhor forma de administração. OBJETIVO: Este estudo clínico prospectivo teve como objetivo comparar o efeito do corticoide inalatório na forma de pó seco com o efeito do corticoide oral, no tratamento da disfonia aguda. MÉTODO: Foram avaliados 32 pacientes adultos, divididos em dois grupos de 16 pacientes para cada um dos tratamentos, antes e após sete dias do uso da medicação. Os pacientes foram submetidos à videolaringosocpia e avaliação perceptiva e acústica da voz. RESULTADOS: O tratamento inalatório e oral reduziram significativamente a hiperemia, o edema e melhorou o movimento muco-ondulatório; entretanto, a redução do edema foi estatisticamente mais significativa (p = 0,012 nos pacientes tratados com a forma inalatória. A comparação dos valores da análise perceptiva auditiva e das medidas acústicas após tratamento entre os grupos, entretanto, não apresentou significância estatística. CONCLUSÃO: Houve melhora significativa da laringite aguda nas avaliações realizadas, em todos os pacientes estudados, com os dois tratamentos. O tratamento com corticoide inalatório foi significativamente mais efetivo na redução do edema.Acute dysphonia is a frequent condition in clinical practice. Its treatment, especially in adults, is not well established in the literature. Steroids are the most recommended drug treatment. However, the existing studies are not enough to establish superiority among the different steroids and the best route of administration. OBJECTIVE: This prospective clinical study aimed at comparing the effect of inhaling steroids as a dry powder with the effect of oral steroids to

  14. A contribution to the study of acute schistosomiasis (an experimental trial Contribuição ao estudo da esquistossomose aguda (uma tentativa experimental

    Directory of Open Access Journals (Sweden)

    Zilton A. Andrade

    1987-09-01

    Full Text Available In an attempt to establish an experimental model of acute schistosomiasis, sequential histological changes were investigated in the skin, lung, liver and spleen of mice infected with 30 or 100 cercariae of Schistosoma mansoni according to four sets of experiments: single infection, repeated infections, unisexual infection and infection in mice born from infected mothers. Animals were killed every other day from exposure up to 50 days after infection. Only mild, isolated, focal inflammatory changes were found before the appearance of mature eggs in the liver, even when repeated infections were made. Severe changes of reactive hepatitis and splenitis appeared suddenly when the first mature eggs were deposited, around the 37th to 42nd day after infection. The mature eggs induced lytic and coagulative necrosis of hepatocytes around them which was soon followed by dense infiltration of eosinophils. So, mature egg-induced lesions appeared as the major factors in the pathogenesis of acute schistosomiasis in mice. Mice born from infected mothers were apparently able to rapidly modulate the egg-lesions, forming early fibrotic granulomas. The murine model of acute schistosomiasis appeared adequate for the study of pathology and pathogenesis of acute schistosomiasis.Numa tentativa para se estabelecer um modelo experimental para o estudo da esquistossomose aguda foram estudadas as alterações presentes na pele, pulmões, fígado e baço de comundongos submetidos a infecção com 30 ou 100 cercarias do Schistosoma mansoni e divididos em quatro tipos de experimentos: infecção simples, infecções repetidas, infecção unissexuada e infecção em animais provenientes de mães infectadas. Os animais foram sacrificados em dias alternados a partir do momento da infecção até 50 dias depois. As lesões encontadas na fase pré-postural foram discretas e poucas, mesmo quando os animais foram submetidos a infecções repetidas. As alterações mais súbitas e

  15. Peroxyl radical reactions with carotenoids in microemulsions: Influence of microemulsion composition and the nature of peroxyl radical precursor.

    Science.gov (United States)

    El-Agamey, Ali; McGarvey, David J

    2016-01-01

    The reactions of acetylperoxyl radicals with different carotenoids (7,7'-dihydro-β-carotene and ζ-carotene) in SDS and CTAC microemulsions of different compositions were investigated using laser flash photolysis (LFP) coupled with kinetic absorption spectroscopy. The primary objective of this study was to explore the influence of microemulsion composition and the type of surfactant used on the yields and kinetics of various transients formed from the reaction of acetylperoxyl radicals with carotenoids. Also, the influence of the site (hydrocarbon phases or aqueous phase) of generation of the peroxyl radical precursor was examined by using 4-acetyl-4-phenylpiperidine hydrochloride (APPHCl) and 1,1-diphenylacetone (11DPA) as water-soluble and lipid-soluble peroxyl radical precursors, respectively. LFP of peroxyl radical precursors with 7,7'-dihydro-β-carotene (77DH) in different microemulsions gives rise to the formation of three distinct transients namely addition radical (λmax=460 nm), near infrared transient1 (NIR, λmax=700 nm) and 7,7'-dihydro-β-carotene radical cation (77DH(•+), λmax=770 nm). In addition, for ζ-carotene (ZETA) two transients (near infrared transient1 (NIR1, λmax=660 nm) and ζ-carotene radical cation (ZETA(•+), λmax=730-740 nm)) are generated following LFP of peroxyl radical precursors in the presence of ζ-carotene (ZETA) in different microemulsions. The results show that the composition of the microemulsion strongly influences the observed yield and kinetics of the transients formed from the reactions of peroxyl radicals (acetylperoxyl radicals) with carotenoids (77DH and ZETA). Also, the type of surfactant used in the microemulsions influences the yield of the transients formed. The dependence of the transient yields and kinetics on microemulsion composition (or the type of surfactant used in the microemulsion) can be attributed to the change of the polarity of the microenvironment of the carotenoid. Furthermore, the nature of

  16. Electronic paramagnetic resonance (EPR) for the study of ascorbyl radical and lipid radicals in marine organisms.

    Science.gov (United States)

    González, Paula Mariela; Aguiar, María Belén; Malanga, Gabriela; Puntarulo, Susana

    2013-08-01

    Electron paramagnetic resonance (EPR) spectroscopy detects the presence of radicals of biological interest, such as ascorbyl radical (A(•)) and lipid radicals. A(•) is easily detectable by EPR even in aqueous solution at room-temperature. Under oxidative conditions leading to changes in total ascorbate (AH(-)) content, the A(•)/AH(-) ratio could be used to estimate early oxidative stress in the hydrophilic milieu. This methodology was applied to a wide range of aquatic systems including algae, sea urchin, limpets, bivalves and fish, under physiological and oxidative stress conditions as well. The A(•)/AH(-) ratio reflected the state of one part of the oxidative defense system and provided an early and simple diagnosis of environmental stressing conditions. Oxidative damage to lipids was assessed by the EPR-sensitive adduct formation that correlates well with cell membrane damage with no interference from other biological compounds. Probe instability, tissue metabolism, and lack of spin specificity are drawback factors for employing EPR for in vivo determination of free radicals. However, the dependability of this technique, mostly by combining it with other biochemical strategies, enhances the value of these procedures as contributors to the knowledge of oxidative condition in aquatic organisms. PMID:23485428

  17. European radicals and the 'Third World’: imagined solidarities and radical networks, 1958-1973

    NARCIS (Netherlands)

    R. Gildea; J. Mark; N. Pas

    2011-01-01

    This article addresses the importance of Third Worldism/tiersmondisme as a source of inspiration for European radicals on both sides of the Iron Curtain 1958-73, focusing on the cases of France, the Netherlands and Hungary. Using both oral history and archival material, it considers the decline of d

  18. Radical Reform Within a Liberal and Democratic Framework? Rawls and the Radical Critique of Schooling.

    Science.gov (United States)

    Claus, John F.

    1981-01-01

    The radical critique of American education portrays the schools as perpetuators of ethnic, social, and racial inequalities because they do not alter existing class relations. John Rawls' theory of social justice is discussed as an alternative approach to this situation that remains firmly grounded in the liberal tradition. (PP)

  19. Fast beam studies of free radical photodissociation

    Energy Technology Data Exchange (ETDEWEB)

    Cyr, D R [Lawrence Berkeley Lab., CA (United States)

    1993-11-01

    The photodissociation of free radicals is studied in order to characterize the spectroscopy and dissociation dynamics of the dissociative electronic states in these species. To accomplish this, a novel method of radical production, based on the photodetachment of the corresponding negative ion, has been combined with a highly complementary form of photofragment translational spectroscopy. The optical spectroscopy of transitions to dissociative states is determined by monitoring the total photofragment yield as a function of dissociation photon energy. Branching ratios to various product channels, internal energy distributions of the fragments, bond dissociation energies, and the translational energy-dependent photofragment recoil angular distributions are then determined at selected excitation energies. A detailed picture of the dissociation dynamics can then be formulated, allowing insight concerning the interactions of potential energy surfaces involved in the dissociation. After an introduction to the concepts and techniques mentioned above, the experimental apparatus used in these experiments is described in detail. The basis and methods used in the treatment of data, especially in the dissociation dynamics experiments, are then put forward.

  20. Free radical facilitated damage of ungual keratin.

    Science.gov (United States)

    Khengar, Rajeshree H; Brown, Marc B; Turner, Rob B; Traynor, Matthew J; Holt, Katherine B; Jones, Stuart A

    2010-09-01

    Thioglycolic acid (TA) and urea hydrogen peroxide (urea H(2)O(2)) are thought to disrupt alpha-keratin disulfide links in the nail. However, optimal clinical use of these agents to improve the treatment of nail disorders is currently hindered by a lack of fundamental data to support their mechanism of action. The aim of this study was to investigate how the redox environment of ungual keratin, when manipulated by TA and urea H(2)O(2), influenced the properties of the nail barrier. Potentiometric and voltammetric measurements demonstrated that urea H(2)O(2) obeyed the Nernst equation for a proton coupled one-electron transfer redox process while TA underwent a series of redox reactions that was complicated by electrode adsorption and dimer formation. The functional studies demonstrated that nail permeability, measured through TBF penetration (38.51+/-10.94 microg/cm(2)/h) and nail swelling (244.10+/-14.99% weight increase), was greatest when relatively low concentrations of the thiolate ion were present in the applied solution. Limiting the thiolate ion to low levels in the solution retards thiolate dimerisation and generates thiyl free radicals. It appeared that this free radical generation was fundamental in facilitating the redox-mediated keratin disruption of the ungual membrane. PMID:20550963

  1. Radical cystectomy: Analysis of postoperative course

    Directory of Open Access Journals (Sweden)

    Jeremić Dimitrije

    2010-01-01

    Full Text Available Background/Aim. Radical cystectomy is a method of choice in the therapy of infiltrative bladder cancer. The aim of this research was to analyze postoperative course after radical cystectomy (length of hospitalization, most frequent complications and utilization of antibiotics and transfusions. Methods. We analyzed the records of 82 patients operated on in the Department of Urology, Clinical Center of Vojvodina, in a three-year period. In order to aquire data World Health Organization (WHO has developed Anatomical Therapeutic Chemical/Defined Daily Dose (ATC/DDD methodology. Defined daily dose (DDD is the assumed average maintenance dose per day for a drug use for its main indication. Results. Continent urinary derivation was preformed in 23.15% cases. Postoperative complications occurred in 18.29% of patients. Average blood utilization was 2.19 units. Blood utilization for continent derivations (n = 48 was 4.6 units, and incontinent ones 3.36 units. Totally 159.33 DDD/100 bed days were used. Conclusion. When preforming continent derivation there is a significant increase in blood utilization. Frequency of postoperative complications correlates to those reported in the literature.

  2. Free radical facilitated damage of ungual keratin.

    Science.gov (United States)

    Khengar, Rajeshree H; Brown, Marc B; Turner, Rob B; Traynor, Matthew J; Holt, Katherine B; Jones, Stuart A

    2010-09-01

    Thioglycolic acid (TA) and urea hydrogen peroxide (urea H(2)O(2)) are thought to disrupt alpha-keratin disulfide links in the nail. However, optimal clinical use of these agents to improve the treatment of nail disorders is currently hindered by a lack of fundamental data to support their mechanism of action. The aim of this study was to investigate how the redox environment of ungual keratin, when manipulated by TA and urea H(2)O(2), influenced the properties of the nail barrier. Potentiometric and voltammetric measurements demonstrated that urea H(2)O(2) obeyed the Nernst equation for a proton coupled one-electron transfer redox process while TA underwent a series of redox reactions that was complicated by electrode adsorption and dimer formation. The functional studies demonstrated that nail permeability, measured through TBF penetration (38.51+/-10.94 microg/cm(2)/h) and nail swelling (244.10+/-14.99% weight increase), was greatest when relatively low concentrations of the thiolate ion were present in the applied solution. Limiting the thiolate ion to low levels in the solution retards thiolate dimerisation and generates thiyl free radicals. It appeared that this free radical generation was fundamental in facilitating the redox-mediated keratin disruption of the ungual membrane.

  3. Modeling Radicalization Phenomena in Heterogeneous Populations

    CERN Document Server

    Galam, Serge

    2015-01-01

    The phenomenon of radicalization is investigated within an heterogeneous population composed of a core subpopulation, sharing a way of life locally rooted, and a recently immigrated subpopulation of different origins with ways of life which can be partly in conflict with the local one. While core agents are embedded in the country prominent culture and identity, they are not likely to modify their way of life, which make them naturally inflexible about it. On the opposite, the new comers can either decide to live peacefully with the core people adapting their way of life, or to keep strictly on their way and oppose the core population, leading eventually to criminal activities. To study the corresponding dynamics of radicalization we introduce a 3-state agent model with a proportion of inflexible agents and a proportion of flexible ones, which can be either peaceful or opponent. Assuming agents interact via weighted pairs within a Lotka-Volterra like Ordinary Differential Equation framework, the problem is an...

  4. Free Radicals and Extrinsic Skin Aging

    Directory of Open Access Journals (Sweden)

    Borut Poljšak

    2012-01-01

    Full Text Available Human skin is constantly directly exposed to the air, solar radiation, environmental pollutants, or other mechanical and chemical insults, which are capable of inducing the generation of free radicals as well as reactive oxygen species (ROS of our own metabolism. Extrinsic skin damage develops due to several factors: ionizing radiation, severe physical and psychological stress, alcohol intake, poor nutrition, overeating, environmental pollution, and exposure to UV radiation (UVR. It is estimated that among all these environmental factors, UVR contributes up to 80%. UV-induced generation of ROS in the skin develops oxidative stress, when their formation exceeds the antioxidant defence ability of the target cell. The primary mechanism by which UVR initiates molecular responses in human skin is via photochemical generation of ROS mainly formation of superoxide anion (O2−•, hydrogen peroxide (H2O2, hydroxyl radical (OH•, and singlet oxygen (1O2. The only protection of our skin is in its endogenous protection (melanin and enzymatic antioxidants and antioxidants we consume from the food (vitamin A, C, E, etc.. The most important strategy to reduce the risk of sun UVR damage is to avoid the sun exposure and the use of sunscreens. The next step is the use of exogenous antioxidants orally or by topical application and interventions in preventing oxidative stress and in enhanced DNA repair.

  5. Fast beam studies of free radical photodissociation

    International Nuclear Information System (INIS)

    The photodissociation of free radicals is studied in order to characterize the spectroscopy and dissociation dynamics of the dissociative electronic states in these species. To accomplish this, a novel method of radical production, based on the photodetachment of the corresponding negative ion, has been combined with a highly complementary form of photofragment translational spectroscopy. The optical spectroscopy of transitions to dissociative states is determined by monitoring the total photofragment yield as a function of dissociation photon energy. Branching ratios to various product channels, internal energy distributions of the fragments, bond dissociation energies, and the translational energy-dependent photofragment recoil angular distributions are then determined at selected excitation energies. A detailed picture of the dissociation dynamics can then be formulated, allowing insight concerning the interactions of potential energy surfaces involved in the dissociation. After an introduction to the concepts and techniques mentioned above, the experimental apparatus used in these experiments is described in detail. The basis and methods used in the treatment of data, especially in the dissociation dynamics experiments, are then put forward

  6. Hegel’s Gesture Towards Radical Cosmopolitanism

    Directory of Open Access Journals (Sweden)

    Shannon Brincat

    2009-09-01

    Full Text Available This is a preliminary argument of a much larger research project inquiring into the relation betweenHegel’s philosophical system and the project of emancipation in Critical International Relations Theory. Specifically, the paper examines how Hegel’s theory of recognition gestures towards a form of radical cosmopolitanism in world politics to ensure the conditions of rational freedom for all humankind. Much of the paper is a ground-clearing exercise defining what is ‘living’ in Hegel’s thought for emancipatory approaches in world politics, to borrow from Croce’s now famous question. It focuses on Hegel’s unique concept of freedom which places recognition as central in the formation of self-consciousness and therefore as a key determinant in the conditions necessary forhuman freedom to emerge in political community. While further research is needed to ascertain the precise relationship between Hegel’s recognition theoretic, emancipation and cosmopolitanism, it is contended that the intersubjective basis of Hegel’s concept of freedom through recognition necessitates some form of radical cosmopolitanism that ensures successful processes of recognition between all peoples, the precise institutional form of which remains unspecified.

  7. Threshold photoelectron spectroscopy of the imidogen radical

    Energy Technology Data Exchange (ETDEWEB)

    Garcia, Gustavo A., E-mail: gustavo.garcia@synchrotron-soleil.fr [Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, BP 48, 91192 Gif sur Yvette (France); Gans, Bérenger [Institut des Sciences Moléculaires d’Orsay, Univ Paris-Sud, CNRS, Bât 210, Univ Paris-Sud, 91405 Orsay Cedex (France); Tang, Xiaofeng [Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, BP 48, 91192 Gif sur Yvette (France); Ward, Michael; Batut, Sébastien [PC2A, Université de Lille 1, UMR CNRS-USTL 8522, Cité Scientifique Bât. C11, F-59655 Villeneuve d’Ascq (France); Nahon, Laurent [Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin, BP 48, 91192 Gif sur Yvette (France); Fittschen, Christa [PC2A, Université de Lille 1, UMR CNRS-USTL 8522, Cité Scientifique Bât. C11, F-59655 Villeneuve d’Ascq (France); Loison, Jean-Christophe [ISM, Université de Bordeaux, CNRS, 351 cours de la Libération, 33405 Talence Cedex (France)

    2015-08-15

    We present the threshold photoelectron spectroscopy of the imidogen radical (NH) recorded in the photon energy region up to 1 eV above its first ionization threshold. The radical was produced by reaction of NH{sub 3} and F in a microwave discharge flow-tube and photoionized using vacuum ultraviolet (VUV) synchrotron radiation. A double imaging coincidence spectrometer was used to record mass-selected spectra and avoid contributions from the byproducts present in the reactor and background gas. The energy region includes the ground X{sup +2}Π and first electronically excited a{sup +4}Σ{sup −} states of NH{sup +}. Strong adiabatic transitions and weak vibrational progressions up to v{sup +} = 2 are observed for both electronic states. The rotational profile seen in the origin band has been modeled using existing neutral and cationic spectroscopic constants leading to a precise determination of the adiabatic ionization energy at 13.480 ± 0.002 eV.

  8. Free radicals in synthetic and natural indigo

    Energy Technology Data Exchange (ETDEWEB)

    Troup, G.J.; Hutton, D.R. [Monash University, Clayton, VIC (Australia). Physics Department; Hewitt, D.J. [Monash University, Clayton, VIC (Australia). Chemistry Department; Picollo, M.; Casini, A. [Istituto di Ricerche sulle Onde Elettromagnetiche, Firenze (Italy)

    1998-12-31

    Full text: It has been suggested that ESR could be useful in identifying paint pigments in Medieval and Renaissance paintings, since most of the pigments are mineral. However, there are some plant pigments, such as indigo, which also give ESR signals. Indigo used to be made from two kinds of plants: the indigoferae, and isatis (woad): the indigo from the former was regarded as the more valuable. With the development of organic chemistry, it became possible to synthesise indigo in the late 19th century. Two samples, presumed synthesised, were obtained from two European suppliers, and a sample known to be prepared from a plant was kindly supplied by the National Gallery of Victoria. These were examined by ESR, using a Varian E-12 (X-band: {approx}9.1 GHz) spectrometer at room temperature. All samples showed a broad signal, and a very sharp (free radical) signal in the g=2 region. One of the presumed synthesised samples gave other signals as well, probably from transition metals. The highest free radical signal was from the plant sample. The stability of these signals is still under study, since `indigo` also contains unoxidised, pale yellow, leuco-indigo

  9. EI igualitarismo radical de John Rawls

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    Rodríguez Zepeda, Jesús

    2004-12-01

    Full Text Available The main purpose of this paper is to offer an interpretation of the canonical statement of justice as fairness (A Theory of Justice as a deeply egalitarian, even radical, argument. In order to do so, the categories of justice as fairness strongly related to the egalitarian and distributive meaning of the rawlsian liberal model and, specifically, those aimed to solve the problem of social justice, are accurately revised, namely, the fair equality of opportunity and the difference principle. The paper evaluates the relative weight of each of these categories in the rawlsian argument for social and economic equality.

    El objetivo central de este texto es interpretar la enunciación canónica de la justicia como imparcialidad (la de Una Teoría de la Justicia como un argumento profundamente igualitarista, incluso radical. Para ello concede especial atención a las categorías de la justicia como imparcialidad que proporcionan las señas de identidad igualitaria a su modelo liberal y, en particular, a aquellas que pretenden ofrecer una solución a los problemas de la llamada justicia social como la justa igualdad de oportunidades y el principio de diferencia. El artículo evalúa el peso relativo de cada una de estas categorías en la construcción del argumento rawlsiano a favor de la igualdad social y económica.

  10. Hydroxyl radical induced degradation of ibuprofen

    Energy Technology Data Exchange (ETDEWEB)

    Illés, Erzsébet, E-mail: erzsebet.illes@chem.u-szeged.hu [Institute of Chemistry, Research Group of Environmental Chemistry, University of Szeged, Szeged (Hungary); Institute of Isotopes, Centre for Energy Research, Hungarian Academy of Sciences, Budapest (Hungary); Takács, Erzsébet [Institute of Isotopes, Centre for Energy Research, Hungarian Academy of Sciences, Budapest (Hungary); Dombi, András [Institute of Chemistry, Research Group of Environmental Chemistry, University of Szeged, Szeged (Hungary); Gajda-Schrantz, Krisztina [Institute of Chemistry, Research Group of Environmental Chemistry, University of Szeged, Szeged (Hungary); Department of Inorganic and Analytical Chemistry, University of Szeged, Szeged (Hungary); EMPA, Laboratory for High Performance Ceramics, Duebendorf (Switzerland); Rácz, Gergely; Gonter, Katalin; Wojnárovits, László [Institute of Isotopes, Centre for Energy Research, Hungarian Academy of Sciences, Budapest (Hungary)

    2013-03-01

    Pulse radiolysis experiments were used to characterize the intermediates formed from ibuprofen during electron beam irradiation in a solution of 0.1 mmol dm{sup −3}. For end product characterization {sup 60}Co γ-irradiation was used and the samples were evaluated either by taking their UV–vis spectra or by HPLC with UV or MS detection. The reactions of {sup ·}OH resulted in hydroxycyclohexadienyl type radical intermediates. The intermediates produced in further reactions hydroxylated the derivatives of ibuprofen as final products. The hydrated electron attacked the carboxyl group. Ibuprofen degradation is more efficient under oxidative conditions than under reductive conditions. The ecotoxicity of the solution was monitored by Daphnia magna standard microbiotest and Vibrio fischeri luminescent bacteria test. The toxic effect of the aerated ibuprofen solution first increased upon irradiation indicating a higher toxicity of the first degradation products, then decreased with increasing absorbed dose. Highlights: ► In hydroxyl radical attack on the ring mainly hydroxylated products form ► The hydrated electron attacks the carboxyl group. ► Oxidative conditions are more effective in ibuprofen decomposition than reductive. ► Ecotoxicity of ibuprofen solution first increases then decreases with irradiation.

  11. Analysis of radicals, radical precursors and chemical transformations for Houston/Texas

    Science.gov (United States)

    Rappenglück, Bernhard; Czader, Beata; Li, Xiangshang

    2015-04-01

    Air quality simulations were performed for the Houston-Galveston-Brazoria area for springtime conditions in May and June of 2009. Meteorological parameters predicted by Weather Research and Forecasting (WRF) model, for which data assimilation with recursive objective analysis was performed, are well simulated most of the time. The Community Multiscale Air Quality (CMAQ) model driven by meteorology from WRF simulates ozone and many other trace species, including radical precursors such as HCHO and HONO, with a satisfactory agreement with observations. While CMAQ satisfactorily captures the daily variations of the OH radical, it sometimes underestimates its high daytime values. Concentrations of HO2 are often underpredicted in polluted air masses and persistently severely underpredicted at low NOx conditions, when the Houston air is affected bymarine air masses. In contrast, concentrations of H2O2 and CH3OOHare almost always overpredicted by the model, the overprediction occurs frequently in the polluted air and occurs always when marine air is encountered. Those mispredictions are consistent despite day-to-day variations in meteorological conditions and emissions and bring into question current representation of radical-related chemistry in the model as radical production and recirculation in the model is overtaken by termination processes and creation ofmore stable compounds, such asH2O2 and CH3OOH. Smaller model biases of H2O2 and peroxides are associated with lower humidity. The relative importance of various photolysis processes as radical sources in the Houston atmosphere was also elucidated. Morning HOx formation is dominated by HONO while ozone contributes the most during midday. HONO contribution to HOx formation is more pronounced at the surface layer where most of it is formed, radical production from ozone is more important at elevated levels where higher concentrations of ozone are observed. Formaldehyde contributes up to 40% and also peaks during midday

  12. Hiponatremia aguda grave en un paciente esquizofrénico potomano Severe and acute hyponatremia in a schizophrenic patient with potomania

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    M.D. Macías Robles

    2009-04-01

    Full Text Available La hiponatremia aguda grave ocasiona una encefalopatía metabólica, cuya fisiopatología es el edema cerebral, y los síntomas más severos son las convulsiones y el coma. Se presenta el caso de una hiponatremia extrema de origen multifactorial en un paciente esquizofrénico potomano. La potomanía no suele ocasionar hiponatremia, salvo coexistencia con otros mecanismos desencadenantes. El paciente descrito presentaba datos de secreción inadecuada de vasopresina (SIADH y una hipokaliemia intensa, secundaria a vómitos y al tratamiento con indapamida, que perpetúa el déficit extracelular de sodio. En el tratamiento del paciente, el único fármaco de introducción reciente fue el aripiprazol, neuroléptico con el que se han notificado casos de secreción inadecuada de vasopresina. La corrección de la hiponatremia aguda grave es una urgencia vital, independientemente de la causa, y consiste en la administración de suero salino al 3%. El sodio no debe aumentar en más de 25 mmol/L durante las primeras 24-48 horas para evitar un daño cerebral secundario.Acute and severe hyponatremia causes a metabolic encephalothy. It is physiopathologically based on the cerebral edema, and its fatal symptoms include seizures and coma. We present a case of an extreme hyponatremia of multifactorial etiology in a schizophrenic patient with potomania. Potomania does not usually cause hyponatremia, unless it coexists with other trigger factors. This patient had a syndrome of inappropriate antidiuretic hormone (SIADH, and a deep hypokaliemia, due to vomiting and a treatment with indapamida, which perpetuates the deficit of extracellular sodium. In the patient’s treatment, aripiprazole was the only recently introduced drug with which cases of inappropriate vasopressin secretion have been reported. Management of a severe hyponatremia must be considered a vital emergency, independent of the cause, and 3% hypertonic saline must be administered. The increase of the

  13. Tratamiento nutricional de los enfermos con pancreatitis aguda: cuando el pasado es presente Nutritional management of patients with acute pancreatitis: when the past is present

    Directory of Open Access Journals (Sweden)

    A. García Almansa

    2008-05-01

    Full Text Available Los pacientes con pancreatitis aguda sufren con frecuencia un acusado deterioro de su estado nutricional. En algunos éste es ya anterior a su ingreso hospitalario, como ocurre en muchos casos de etiología alcohólica. En otras ocasiones la desnutrición se manifiesta posteriormente en el seno de una pancreatitis de larga evolución o complicada, que impide una correcta alimentación por un tiempo prolongado. A todo ello hay que sumar el hipercatabolismo proteico y el estrés que presentan estos enfermos. Es norma habitual en el tratamiento de la pancreatitis aguda mantener al enfermo en ayuno absoluto. En las pancreatitis leves este estado solo es necesario durante muy pocos días, iniciándose la realimentación por vía oral progresivamente, y no se requieren especiales cuidados nutricionales, salvo que presenten una desnutrición previa. Ahora bien, en los pacientes con pancreatitis moderada y/o grave en los que se prevé un ayuno prolongado por más de una semana, debemos siempre recurrir a un soporte nutricional artificial, que preserve el estado nutricional de estos enfermos, ya que no es suficiente la habitual reposición hidroelectrolítica. En este capítulo realizaremos una revisión actualizada del tratamiento nutricional en estas situaciones, intentando responder a diferentes preguntas entre las que se incluyen el tipo de soporte nutricional indicado, cuándo hay que instaurarlo y hasta qué momento.Patients with acute pancreatitis usually present nutritional status impairment. In alcoholic pancreatitis this impairment is usually presented before hospital admission. In patients with long-term complicated pancreatitis, malnutrition develops during the course of the disease. Besides, these patients present an increased stress and protein hypercatabolism. Treatment of acute pancreatitis usually maintains patients in a short period of starvation. In mild pancreatitis, starvation is needed for a few days, beginning progressively oral

  14. Percepção de dor aguda em pacientes com transtorno de pânico Acute pain perception in panic disorder patients

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    Fernando Pereira Miranda

    2011-01-01

    Full Text Available O presente trabalho investigou experimentalmente os limiares nociceptivos e a percepção subjetiva de dor no transtorno de pânico (TP. Trinta e sete pacientes com TP foram voluntariamente submetidos a um Teste Pressor ao Frio (TPF, em que uma de suas mãos era mergulhada em um banho termostatizado de água fria (7ºC por um período máximo de três minutos. A latência de retirada da mão da água foi utilizada como um índice de dor aguda, enquanto a experiência subjetiva de dor foi avaliada por meio do Questionário McGill de Dor e de uma escala visual analógica. Os resultados indicaram latências similares de retirada da mão em comparação a 37 sujeitos-controle sadios, mas uma experiência subjetiva de dor significantemente maior nos pacientes com TP. Esse padrão de resultados não apenas confirma a utilidade do teste de pressor ao frio para a indução e estudo experimental da dor aguda em laboratório, mas também sugere uma importante associação entre dor e ansiedade.The present study experimentally investigated the nociceptive threshold and the subjective pain perception in panic disorder (PD. Thirty seven PD patients were voluntarily submitted to a cold pressor test (CPT in which one of their hands was dipped into a thermostatized cold water bath (7ºC for a maximum period of three minutes. Acute pain experience was assessed by measuring the hand retrieval latency, whereas the subjective pain experience was evaluated through McGill Pain Questionnaire and a pain visual analog scale. As compared to 37 healthy control-subjects, results indicated similar hand retrieval latencies but a significantly higher subjective pain experience in PD patients. Such pattern of results not only indicates the usefulness of the cold pressor test to induce and experimentally study pain in laboratory settings, but also suggests an important anxiety-pain association.

  15. Revisión de casos operados con diagnóstico clínico de apéndicitis aguda en pacientes

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    Gilberto Rodríguez-Herrera

    2003-06-01

    Full Text Available Justificación y objetivo: La apendicitis aguda es la urgencia quirúrgica abdominal más frecuente de la infancia. El objetivo del presente estudio fue realizar un análisis médico quirúrgico sobre el grupo de edad más común, género, grado de apendicitis y tratamientos previos de los pacientes apendicectomizados en el Servicio de Cirugía Pediátrica del Hospital de San Carlos. Método: Se incluyeron 120 pacientes de ambos sexos, apendicectomizados en el Servicio de Cirugía Pediátrica del Hospital de San Carlos, con edades comprendidas entre los 0 y 13 años, durante el período de enero de 1999 a agosto de 2001. La recolección de los datos fue llevada a cabo por el investigador, en una revisión exhaustiva de las historias clínicas y los expedientes. Resultados: Entre los 120 pacientes operados, el grupo de edad más frecuente es de 10 a 13 años, el género al que mayormente se le realizó apendicectomía fue el masculino, el grado clínico patológico que predominó fue el segundo. Entre los tratamientos previos más utilizados están los analgésicos no opioides y los antinflamatorios no esteroidales. Los pacientes que recibieron tratamiento médico previo presentaron mayor grado apendicular clínico patológico durante la apendicectomía. Conclusiones: El diagnóstico de apendicitis aguda es principalmente clínico. Su retraso y el inicio de tratamiento médico son factores importantes que repercuten en la evolución y en el incremento de la morbilidad y mortalidad del paciente pediátrico.

  16. Indicación de la fisioterapia respiratoria convencional en la bronquiolitis aguda Indications of conventional chest physiotherapy in acute bronchiolitis

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    Liliana Bohé

    2004-06-01

    Full Text Available Los objetivos de este trabajo fueron evaluar la utilidad de la fisioterapia respiratoria convencional en el tratamiento de la bronquiolitis aguda y determinar su influencia sobre los días de hospitalización. Se realizó un ensayo clínico controlado aleatorizado, donde se incluyeron dieciseis pacientes con bronquiolitis que fueron tratados dos veces al día con fisioterapia torácica y se compararon con dieciséis pacientes control, con la misma patología, quienes recibían sólo aspiración nasofaríngea. El grupo de tratamiento presentó un promedio en el score clínico de dificultad respiratoria al ingreso de 5.56 (± 1.96 y al alta 3.25 (± 1.27. El grupo control presentó un score de 5.75 (± 1.61 y 3.12 (± 1.30, p=0.77 y p=0.76 respectivamente. Respecto al promedio en los días de hospitalización fue de 4.00 (± 2.00 en el grupo de tratamiento y de 3.87 (± 1,30 para el grupo control, p=0.84. Concluimos que la fisioterapia respiratoria no aporta beneficio en su uso rutinario en el manejo de la broquiolitis aguda ni acorta los días de hospitalización.To evaluate the benefits of conventional chest physiotherapy in acute bronchiolitis, 32 patients were allocated in a randomized controlled trial, 16 were given twice daily chest physiotherapy compared with 16 controls who were not given chest physiotherapy. The treatment group showed a mean clinical score for respiratory disability at admission of 5.56 (± 1.96, and 3.25 (± 1.27 when discharged. The control group presented a score of 5.75 (± 1.61 and 3.12 (± 1.30, p=0.77 and p=0.76 respectively. The mean length of illness in hospital in the treatment group was 4.00 (± 2.00 vs 3.87 (± 1.30 in the control group, p=0.84. Chest physiotherapy does not produce clinically important benefits in the treatment of acute bronchiolitis.

  17. Transplante de células-tronco hematopoéticas e leucemia mieloide aguda: diretrizes brasileiras Hematopoietic stem cells transplantation and acute myeloid leukemia: Brazilian guidelines

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    Lucia Mariano R. Silla

    2010-05-01

    Full Text Available O objetivo deste trabalho foi definir diretrizes para a indicação do transplante de células-tronco hematopoéticas (TCTH no tratamento da leucemia mieloide aguda (LMA no Brasil. O papel do TCTH no tratamento da LMA foi discutido pelosautores e apresentado para a Sociedade Brasileira de Transplante de Medula Óssea na reunião sobre Diretrizes Brasileiras para o TCTH, que o ratificou. Este consenso foi baseado na revisão da literatura internacional e na experiência brasileira em TCTH para o tratamento da LMA. O tratamento ideal para leucemia mieloide aguda em primeira remissão completa (1RC ainda não está definido. Há consenso na indicação do TCTH alogênico, com condicionamento mieloablativo, para pacientes que apresentem alterações citogenéticas consideradas de alto risco. O TCTH alogênico não está indicado na 1RC para pacientes de baixo risco citogenético e, aparentemente, o TCTH alogênico, autólogo ou a quimioterapia de consolidação são equivalentes para os pacientes de risco intermediário.The objective of this work was to define guidelines for the indication of hematopoietic stem cells transplantation (HSCT in the treatment of acute myeloid leukemia (AML in Brazil. The role of HSCT in the treatment of AML was discussed by the authors and presented to the Brazilian Society of Bone Marrow Transplantation in a meeting to formulate and ratify the Brazilian Guidelines on HSCT. This consensus was based on a review of international publications and on the Brazilian experience in HSCT for the treatment of AML. The optimal treatment for AML in first complete remission (1CR has not been defined yet. There is consensus on the indication of allogeneic HSCT with myeloablative conditioning for patients who present high risk cytogenetic changes. Allogeneic HSCT is not indicated for low cytogenetic risk 1RC patients and, apparently, allogeneic and autologous HSCT and consolidation chemotherapy are similar for intermediate risk

  18. Otite externa difusa aguda: um estudo prospectivo no verão do Rio de Janeiro Acute diffuse external otitis: a prospective study in Rio de Janeiro's summer

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    Ricardo R. Figueiredo

    2004-04-01

    Full Text Available A Otite Externa Aguda é uma doença extremamente comum em países tropicais, especialmente no verão. Vários fatores predisponentes são identificáveis e o quadro clínico pode ser bastante variado, principalmente com relação à intensidade da otalgia. OBJETIVO: Avaliar, através de um estudo prospectivo no maior hospital de Emergências do Rio de Janeiro, a incidência e as características da otite externa no período de verão. FORMA DE ESTUDO: Estudo clínico com coorte transversal. MATERIAL E MÉTODO: 391 pacientes com otite externa atendidos no Serviço de ORL do Hospital Souza Aguiar foram avaliados em uma série de parâmetros clínicos e de tratamento, incluindo análise de possíveis fatores predisponentes. RESULTADOS: Os principais sintomas referidos foram otalgia, otorréia discreta e plenitude auricular. Os principais fatores predisponentes foram banho de mar e piscina e uso de cotonetes. CONCLUSÃO: A otite externa aguda é uma doença extremamente comum em países tropicais, especialmente no verão. A possível contaminação da água de praias e piscinas, embora descartada por vários autores como fatores predisponentes, pode ter alguma influência na sua patogênese.The acute external otitis is a very common disease in tropical countries, especially in summer. There are many predisposing factors and clinical features may vary, particularly the pain's severity. AIM: Evaluate, with a prospective study in Rio de Janeiro's largest Urgencies Hospital, the incidence and characteristics of the acute external otitis in summer. STUDY DESIGN: Clinical study with transversal cohort. MATERIAL AND METH: 391 patients with acute external otitis in Souza Aguiar Hospital were evaluated in several clinical and treatment parameters, including predisposing factors analysis. RESULTS Pain, moderate ear discharge and sensation of "full ear" were the most common complaints. Sea and pool baths and the use of ear sticks were the most common

  19. Traqueostomia precoce versus traqueostomia tardia em pacientes com lesão cerebral aguda grave Early versus late tracheostomy in patients with acute severe brain injury

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    Bruno do Valle Pinheiro

    2010-02-01

    Full Text Available OBJETIVO: Comparar os efeitos da traqueostomia precoce e da traqueostomia tardia em pacientes com lesão cerebral aguda grave. MÉTODOS: Estudo retrospectivo com 28 pacientes admitidos na UTI do Hospital Universitário da Universidade Federal de Juiz de Fora com diagnóstico de lesão cerebral aguda grave e apresentando escore na escala de coma de Glasgow (ECG OBJECTIVE: To compare the effects of early tracheostomy and of late tracheostomy in patients with acute severe brain injury. METHODS: A retrospective study involving 28 patients admitted to the ICU of the Federal University of Juiz de Fora University Hospital in Juiz de Fora, Brazil, diagnosed with acute severe brain injury and presenting with a Glasgow coma scale (GCS score < 8 within the first 48 h of hospitalization. The patients were divided into two groups: early tracheostomy (ET, performed within the first 8 days after admission; and late tracheostomy (LT, performed after postadmission day 8. At admission, we collected demographic data and determined the following scores: Acute Physiology and Chronic Health Evaluation (APACHE II, GCS and Sequential Organ Failure Assessment (SOFA. RESULTS: There were no significant differences between the groups (ET vs. LT regarding the demographic data or the scores: APACHE II (26 ± 6 vs. 28 ± 8; p = 0.37, SOFA (6.3 ± 2.7 vs. 7.2 ± 3.0; p = 0.43 and GCS (5.4 ± 1.7 vs. 5.5 ± 1.7; p = 0.87. The 28-day mortality rate was lower in the ET group (9% vs. 47%; p = 0.04. Nosocomial pneumonia occurring within the first 7 days was less common in the ET group, although the difference was not significant (0% vs. 23%; p = 0.13. There were no differences regarding the occurrence of late pneumonia or in the duration of mechanical ventilation between the groups. CONCLUSIONS: On the basis of these findings, early tracheostomy should be considered in patients with acute severe brain injury.

  20. Enfermedad injerto vs hospedero postransfusional en un paciente con leucemia linfoblástica aguda Graft vs host disease after transfusion in a patient with acute linfoblastic leukemia

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    TR Nijamin

    Full Text Available La enfermedad injerto vs hospedero (EICH es un proceso inmunológico, desencadenado por linfocitos T de un donante inmunocompetente, que reaccionan contra los tejidos de un receptor inmunocomprometido. Esto origina daño multiorgánico severo en el agente receptor. Las manifestaciones cutáneas son un signo clínico relevante en períodos tempranos. La EICH postranfusional (EICH-PT es una entidad poco frecuente y con alta tasa de mortalidad, que se observa en pacientes luego de transfusiones con hemoderivados no irradiados. Los corticoides son el pilar fundamental del tratamiento, una vez instalado el cuadro. La prevención con leucorreducción e irradiación de los componentes sanguíneos, constituye el sustento primordial para evitar su desarrollo. Presentamos un paciente de 5 años de edad, con un diagnóstico de leucemia linfoblástica aguda de alto riesgo, de múltiples transfusiones de glóbulos rojos sin tratamiento radiante previo, a quien se le realiza el diagnóstico dermatológico e histopatológico de EICH aguda postransfusional.Graft vs host disease (GVHD is a process triggered by immune T cells, that react immunocompetent donor tissue against a recipient immunocompromised. This causes severe multiorgan damage in the receiving agent. Cutaneous manifestations are an important clinical sign in early periods. Postranfusional GVHD (GVHD-PT is a rare entity with high mortality rate, observed in patients after transfusion with blood products not previously irradiated. Corticosteroids are the mainstay of treatment after installation of the box, however prevention with leukoreduction and irradiation of blood components remains the mainstay to prevent its development. We present a patient 5 years of age, diagnosed with acute lymphoblastic leukemia at high risk with a history of multiple transfusions of red blood cells without prior radiation treatment, who is performed dermatological and histopathological diagnosis posttransfusion acute GVHD.