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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Analyse des phénomènes de Raynaud sclérodermiques

Durant, Cécile Pistorius, Marc-Antoine. January 2007 (has links)
Thèse d'exercice : Médecine. Médecine interne : Nantes : 2007. / Bibliogr.
2

Andrenergic receptor agonists and antagonists in Raynaud's syndrome

Cleophas, Ton J. M. January 1982 (has links)
Thesis (doctoral)--Katholieke Universiteit te Nijmegen.
3

Etude de la fonction microvasculaire cutanée dans le syndrome de Raynaud : approches physiopathologique et pharmacologique

Roustit, Matthieu 30 September 2011 (has links) (PDF)
La microcirculation cutanée a été proposée comme modèle d'étude de la dysfonction microvasculaire globale dans les maladies cardiovasculaires. Par ailleurs, elle est spécifiquement atteinte dans le syndrome de Raynaud, qui est une ischémie paroxystique des extrémités déclenchée notamment par le froid. L'exploration de la fonction microvasculaire cutanée suscite donc un réel intérêt, mais les méthodes d'étude souffrent d'une hétérogénéité importante, et leur variabilité intra-individuelle est mal connue. La première partie de ce travail fait la synthèse des différentes méthodes d'étude la fonction microvasculaire cutanée, et rapporte les résultats de deux études consacrées à leur reproductibilité. Nous avons dans une seconde partie étudié grâce à ces tests la réactivité microvasculaire cutanée dans le syndrome de Raynaud, et mis en évidence des anomalies chez ces patients, notamment du contrôle neuro-vasculaire. La dernière partie de cette thèse est consacrée à l'étude d'approches pharmacologiques ciblées sur les anomalies de la microcirculation cutanée identifiées chez les patients. Nous avons évalué l'effet du sildenafil, un inhibiteur de la phosphodiesterase-5, sur le flux sanguin digital et montré son effet vasodilatateur lors d'un refroidissement local dans le syndrome de Raynaud. Enfin, nous avons étudiés chez l'animal et chez l'homme l'iontophorèse de vasodilatateurs, une approche innovante d'administration locale de médicaments pour augmenter le flux sanguin cutané.
4

The white cold hand physiologic, angiographic and pharmacologic study on the hand circulation with special reference to Raynaud's phenomenon /

Arneklo-Nobin, Birgitta. January 1983 (has links)
Thesis (doctoral)--Lund, 1983.
5

Immunological studies in Raynaud's phenomenon

Meulen, Jan van der. January 1979 (has links)
Proefschrift--Groningen.
6

Darstellung der Auswirkungen von kohlensäurehaltigen Handbädern bei Patienten mit systemischer Sklerose und Raynaud-Phänomen mittels Doppler und B-Flow Ultraschalltechnik

Müller-Eschner, Matthias January 2009 (has links)
Zugl.: Giessen, Univ., Diss., 2009
7

Estudo prospectivo de capilaroscopia periungueal em crianças e adolescentes com dermatomiosite e fenômeno de Raynaud / Prospective evaluation by nailfold capillaroscopy in children and adolescents with dermatomyositis and Raynaud’s phenomenon

Piotto, Daniela Gerent Petry [UNIFESP] 30 June 2010 (has links) (PDF)
Made available in DSpace on 2015-07-22T20:50:11Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-06-30 / A capilaroscopia periungueal (CPU) é um método diagnóstico simples, não invasivo e de baixo custo que permite o estudo in vivo do estado funcional e morfológico da rede capilar através da visualização direta da fileira distal de capilares da região periungueal dos dedos das mãos. Ela é usada para distinguir o fenômeno de Raynaud (FRy) primário do secundário, como preditor de prognóstico para as colagenoses e para diferenciar doença ativa de inativa (principalmente na dermatomiosite). Nossos objetivos foram avaliar o valor da CPU na evolução da atividade de doença na dermatomiosite juvenil (DMJ) e avaliar os achados clínicos e de CPU de uma coorte de crianças e adolescentes com FRy sem critérios para doenças reumáticas auto-imunes (DRAI). Foram avaliados prospectivamente 30 pacientes com DMJ (critérios de Bohan e Peter) e 40 crianças e adolescentes com FRy através do exame clínico (alterações cutâneas e força muscular) e laboratorial (enzimas musculares, provas de fase aguda e anticorpo antinuclear - AAN). A avaliação capilaroscópica foi realizada através de um microscópio óptico com aumentos de 10 e 16 vezes. O grupo de pacientes com DMJ compreendeu 20 pacientes do sexo feminino (66,6%), com média de idade de 10,4 anos e tempo médio de evolução da doença de 4 anos. Na primeira avaliação 22 das 26 capilaroscopias periungueais (84,6%) realizadas durante a fase ativa exibiram padrão escleroderma (padrão SD) e os 4 exames realizados durante a remissão foram normais. Portanto, em 26 dos 30 pacientes (86,6%) avaliados os dados clínicos e laboratoriais foram associados com os achados capilaroscópicos. Na avaliação prospectiva 15 dos 18 pacientes (83,3%) que mantinham atividade de doença persistiam com padrão SD na CPU e 10 dos 12 exames (83,3%) realizados durante a remissão foram normais ou apresentaram melhora do padrão SD. Portanto, em 25 dos 30 pacientes (83,3%) reavaliados a CPU também se associou com a presença ou ausência de atividade da doença. No grupo de crianças e adolescentes com FRy, 30 (75%) eram do sexo feminino, com média de idade de 14,6 anos e tempo médio de evolução de 4,2 anos. A média de idade do início dos sintomas foi de 10,4 anos e o tempo médio até o diagnóstico de 1,4 anos. Treze (32,5%) dos 40 pacientes apresentaram AAN positivo. Cinco pacientes (12,5%) apresentaram alterações na CPU inicial: 4 microangiopatia inespecífica e 1 padrão SD. Todos foram avaliados prospectivamente e 3 (7,5%) apresentaram alterações na CPU com tempo médio entre as avaliações de 1,6 anos (dos quais 2 sem alterações na 1ª avaliação). Dois pacientes com padrão SD na CPU apresentaram durante a evolução doença mista do tecido conjuntivo e hipotireoidismo respectivamente. Em um paciente com CPU normal e presença de auto-anticorpos foi diagnosticado lúpus eritematoso sistêmico após 1 ano da avaliação inicial. A CPU se associa com a atividade da DMJ e é útil para excluir doenças reumáticas ou outra doença auto-imune nas crianças e adolescentes com FRy. / Objective: To evaluate prospectively the clinical features and nailfold capillaroscopy findings of a cohort of children and adolescents who presented Raynaud´s phenomenon without criteria for auto-immune rheumatic diseases. Methods: We included 40 children and adolescents with Raynaud’s phenomenon. Each patient was clinically evaluated and laboratory exams were performed, including antinuclear antibodies. Concomitantly we also performed a nailfold capillaroscopy by using a optical microscope with a magnification of 10 and 16X. Results: Thirty (75%) out of 40 patients were girls with a mean age of 14.6 years and mean follow-up time of 4.2 years. The mean age at disease onset was 10.4 years and the mean time until diagnosis 1.4 years. Thirteen out of 40 patients (32,5%) presented antinuclear antibodies positivity. Five (12.5%) patients had altered nailfold capillaroscopy: 4 inespecific microangiopathy and 1 scleroderma pattern. All patients were prospectively evaluated within a mean interval time of 1.6 years and 3 (7.5%) patients presented nailfold capillaroscopy alterations. Two patients that showed scleroderma pattern at the nailfold capillaroscopy presented during the follow-up mixed connective tissue disease and hypothyroidism, respectively. In a patient with normal nailfold capillaroscopy and auto-antibodies positivity systemic lupus erythematosus was diagnosed after 1 year of initial evaluation. Conclusions: Raynaud´s phenomenon remains primary in most cases, however nailfold capillaroscopy is useful to help in exclusion of auto-immune rheumatic diseases or other auto-immune diseases. / TEDE / BV UNIFESP: Teses e dissertações
8

Modélisation de l'influence des sollicitations mécaniques dynamiques sur les phénomènes de remodelage et de croissance des vaisseaux sanguins des membres supérieurs / Modeling the influence of dynamic sollicitations on the growth and on the remodeling of the upper limb blood vessels

Hua, Yue 22 September 2017 (has links)
Le syndrome de vibration main-bras (HAVS) est généralement provoqué par l'utilisation d'outils électriques portatifs sur le long terme ; il se manifeste après une exposition au froid, en provoquant une forte et anormale vasoconstriction des vaisseaux sanguins. L'objectif de la thèse est d'établir un nouveau modèle prédictif des changements géométriques et structurels des parois des capillaires causés par l'exposition des membres supérieurs aux vibrations. Le contexte médical du HAVS est rappelé en premier lieu, en particulier les mécanismes pathologiques sous-jacents. Les modèles constitutifs des tissus mous de la pulpe de doigt et de la paroi du vaisseau en croissance issus de la littérature sont rappelés. Dans la troisième partie de la thèse, les paramètres élastiques et visqueux de la pulpe du doigt sont identifiés par le recalage des résultats de la simulation d'un modèle 2D d'une section transversale du bout du doigt avec des données expérimentales. La dernière partie de la thèse aborde la modélisation de la croissance des capillaires induite par la vibration de l'outil, en considérant des échelles spatiales et temporelles macroscopique et microscopique. Le problème spatial multi-échelles est résolu par une méthode de zoom structural, le champ de déformation calculé à l’échelle macroscopique définissant la condition limite appliquée ensuite à l’échelle microscopique. Le problème multi-échelle de temps est résolu en transformant le problème dynamique en un problème équivalent quasi-statique. Les résultats obtenus montrent que les vibrations induisent l'épaississement de la paroi du capillaire, l’effet étant maximum au voisinage de la fréquence de résonance. Des analyses paramétriques sont réalisées pour étudier la relation entre la croissance des capillaires en fonction de la localisation dans la pulpe du doigt, la fréquence de la vibration, l’amplitude de la pré-charge statique, et la dose de vibrations / Hand-Arm Vibration syndrome (HAVS) is usually caused by long-term use of hand-held power tools. It typically occurs after exposure to cold, causing an abnormally strong vasoconstriction of blood vessels. A model predicting the geometrical and structural changes of the arterial walls caused by vibration exposure is developed for the first time in this thesis. The medical context of HAVS is first recalled, especially the underlying pathological mechanisms. The constitutive models for the finger pulp and the growth of the vessel wall from the literature are used as a basis for the modeling of the arterial wall remodeling under exposure to vibration. The elastic and viscous parameters of the fingertip have been identified by adjusting the simulation results of a 2D model of fingertip cross-section to available experimental data. The last part of the thesis develops a first attempt to build the growth model of capillary induced by the tool vibration, considering multiscale spatial and temporal aspects. The two-scale spatial problem is solved by a structure focus, the deformation field computed at the macro level defining the boundary condition next applied at the microscopic level. The two-scale time problem is solved by transforming the dynamic problem into a quasi-static problem. The results obtained show that vibration induces an increase of the thickness of the capillary's wall. Parametric analyses were carried out to study the relationships between the capillary growth and their localization within finger’s pulp, the vibration frequency, the magnitude of the static preload and the vibration dose
9

USO DE DROGAS PSICOTRÓPICAS POR POLICIAIS MILITARES DE GOIÂNIA E APARECIDA DE GOIÂNIA, GOIÁS, BRASIL / PSYCHOTROPIC DRUG USE BY POLICE MILITARY Goiânia and Aparecida de Goiânia, Goiás, BRAZIL

COSTA, Sérgio Henrique Nascente 01 July 2009 (has links)
Made available in DSpace on 2014-07-29T15:25:22Z (GMT). No. of bitstreams: 1 tese sergio nascente costa ciencias saude.pdf: 3835674 bytes, checksum: 6034e0701fc67a4a611b07fa22a5df92 (MD5) Previous issue date: 2009-07-01 / Licit drugs like alcohol, and illicit drugs such as marijuana, cocaine, opioids and amphetamines, are used by millions of people worldwide. The damage to health occurring due to the acute or chronic, and also due to psychomotor and behavioral changes that these substances cause the users. A situation that deserves special attention is the use of drugs in the workplace, especially in enterprises and institutions in need of constant concentration and emotional balance in labor activities. Thus the objective of this study was to determine the survey of psychotropic drug use among Military Police members in the state of Goiás, Brazil, and correlate it with the frequency in society in general. This study was done by the application of a questionnaire and toxicological analysis of urine samples collected at the beginning of the work day, for the detection of cannabinoids, cocaine, amphetamines, methamphetamine, opiates and benzodiazepines. Study carried out from March to October 2008 in 12 Military Police units in the municipalities of Goiânia and Aparecida de Goiânia. Voluntary participants (n = 221) were interviewed about drug use employing a questionnaire especially designed by the Centro Brasileiro de Informações sobre Drogas Psicotrópicas (CEBRID). Data were analyzed by descriptive statistics to determine the frequency of licit and illicit drug use. The frequency of use was: lifetime tobacco 39.9%; alcohol 87.8%; cannabis 8.1%; cocaine 1.8%; stimulants 7.2%; solvents 10.0%; sedatives, anxiolytics, antidepressants 6.8%; LSD 0.5%; Bentyl® 0.5%; anabolic steroids 5.4%; last year use tobacco 15.4%; alcohol 72.9%; stimulants 6.3%; solvents 0.5%; sedatives, anxiolytics, antidepressants 3.7%; use in the past 30 days tobacco 14.5%; alcohol 57.5%; stimulants 5.0%; solvents 0.5; sedatives, Abstract xvii anxiolytics, antidepressants 3.7%. The prevalence of psychotropic drug use found for Military Police members in the state of Goiás, Brazil, is similar to the results of national and international surveys with civilians, showing that the former are at similar risk to become users of legal and illegal drugs. Moreover, 299 samples of urine was submitted to toxicological analysis by immunochromatographic screening tests; whose positive results for cannabinoids and amphetamines, were referred for confirmation by GC / MS. Thus, the results were as follows: 0.33% of samples positive for amphetamine, 0.67% of samples positive for cannabinoids, 1.34% for benzodiazepines and 97.66% negative. Thus the total percentage of positive samples were 2.34%. The research carried out by military police with voluntary form showed that military and civil community in general, are subject to similar risks of abuse of licit and illicit drugs and it is an alert to development of testing drugs in the workplace, to avoid the consequences arising from the consumption of psychoactive substances / Drogas lícitas, como o álcool, e ilícitas, como a maconha, a cocaína, os opióides e as anfetaminas são utilizadas por milhões de pessoas no mundo. Os prejuízos à saúde ocorrem em virtude da intoxicação aguda ou crônica, e também devido às alterações comportamentais e psicomotoras que essas substâncias provocam nos usuários. Uma das situações que merecem especial atenção é o uso de drogas no ambiente de trabalho, notadamente em empresas e/ou instituições que necessitam de constante concentração e equilíbrio emocional nas atividades laborais. Desta forma, o objetivo deste trabalho foi realizar um levantamento sobre o uso de drogas psicotrópicas em 12 unidades da Polícia Militar do Estado de Goiás, nos municípios de Goiânia e Aparecida de Goiânia. Este levantamento foi feito por meio da aplicação de um questionário e da realização de análise toxicológica, em amostras de urina coletadas no início da jornada de trabalho, para a pesquisa de canabinóides, cocaína, anfetaminas, metanfetaminas, opiáceos e benzodiazepínicos. Os resultados obtidos a partir da aplicação do questionário em 221 sujeitos foram os seguintes: uso na vida tabaco 39,9%; álcool 87,8%; maconha 8,1%; cocaína 1,8%; estimulantes 7,2%; solventes 10,0%; sedativos, ansiolíticos, antidepressivos 6,8%; LSD 0,5%; Bentyl® 0,5%; anabolic steroids 5,4%; uso no último ano tabaco 15,4%; álcool 72,9%; estimulantes 6,3%; solventes 0.5%; sedativos, ansiolíticos, antidepressivos 3,7%; uso no mês anterior tabaco 14,5%; álcool 57,5%; estimulantes 5,0%; solventes 0,5 %; sedativos, ansiolíticos, antidepressivos 3,7%. Por outro lado, as 299 amostras de urina obtidas para análise toxicológica foram submetidas aos testes de triagem imunocromatográficos, cujos resultados Resumo xv positivos para canabinóides e anfetaminas foram encaminhados para confirmação por GC/MS. Desta forma, os resultados foram os seguintes: 0,33% de amostras positivas para anfetaminas; 0,67% de amostras positivas para canabinóides; 1,34% para benzodiazepínicos; 97,66% foram de resultados negativos. Assim o percentual total de amostras positivas foi de 2,34%. Não foi encontrado nenhum caso de associação de drogas. Em relação aos casos positivos, 57,1% corresponderam ao uso de benzodiazepínicos; 28,6% ao uso de canabinóides e 14,3% ao uso de anfetaminas. A pesquisa realizada de forma inédita, voluntariamente, em policiais militares revela que estes profissionais, como a comunidade civil em geral, estão sujeitos a riscos semelhantes de se tornarem usuários de drogas lícitas e ilícitas, e alerta em relação à necessidade da implantação de testes de drogas no ambiente de trabalho, visando evitar as conseqüências decorrentes do consumo de substâncias psicoativas
10

Modèle local des schémas de Hilbert-Siegel de niveau Г₁(p) / Local model of Hilbert-Siegel moduli schemes in Г₁(p)-level

Liu, Shinan 28 September 2018 (has links)
Dans cette thèse, nous étudions la mauvaise réduction de variétés de Shimura. Plus précisément, nous construisons un modèle local des schémas de Hilbert-Siegel de niveau Г₁(p) sur Spec Zq lorsque p est non-ramifié dans le corps totalement réel, où q est le cardinal résiduel au-dessus de p. Notre outil principal est une variante sur le petit topos de Zariski du complexe de Lie anneau-équivariant Aℓv_G défini par Illusie dans sa thèse, où A est un anneau commutatif et G est un schéma en A-modules.Nous montrons aussi une compatibilité entre le complexe de Lie de G équivariant par l’anneau A, et celui équivariant par le monoïde multiplicatif sous-jacent de A.Ce complexe nous permet de calculer le complexe de Lie Fq-équivariant d’un schéma en groupes de Raynaud, donc de relier le modèle entier et le modèle local. / In this thesis, we study the bad reduction of Shimura varieties. More precisely, we construct a local model of Hilbert-Siegel moduli schemes in level Г₁(p) over Spec Zq when p is unramified in the totally real field, where q is the residue cardinality over p. Our main tool is a variant over the small Zariski topos of the ring-equivariant Lie complex Aℓv_G defined by Illusie in his thesis, where A is a commutative ringand G is a scheme of A-modules. We also prove a compatibility result between thering-equivariant Lie complex and the Lie complex equivariant by the multiplicative monoid underlying this ring. With this complex, we calculate the Fq-equivariant Lie complex of a Raynaud group scheme, then relate the integral model and the local model.

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