Academic literature on the topic 'NERVOS PERIFÉRICOS - LESÕES'
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Journal articles on the topic "NERVOS PERIFÉRICOS - LESÕES"
Guirro, Rinaldo R. J. "O uso do ultrassom terapêutico na regeneração de nervos periféricos após lesão por esmagamento." Fisioterapia Brasil 11, no. 5 (2017): 381. http://dx.doi.org/10.33233/fb.v11i5.1426.
Full textMartins, Roberto S., and Mario G. Siqueira. "Uso da nanotecnologia no reparo das lesões traumáticas de nervos." Arquivos Brasileiros de Neurocirurgia: Brazilian Neurosurgery 26, no. 03 (2007): 111–17. http://dx.doi.org/10.1055/s-0038-1625517.
Full textSilva Freitas, Thiago da, and Leandro Pretto Flores. "Uso da técnica de tubulização para o reparo de lesões do sistema nervoso periférico." Arquivos Brasileiros de Neurocirurgia: Brazilian Neurosurgery 26, no. 01 (2007): 16–23. http://dx.doi.org/10.1055/s-0038-1625504.
Full textMartins, Roberto S., Mario G. Siqueira, Osmar J. S. Moraes, João N. Stavale, and Nise Yamaguchi. "Tumor neuroectodérmico primitivo periférico originado em ramo do nervo ciático." Arquivos Brasileiros de Neurocirurgia: Brazilian Neurosurgery 21, no. 03/04 (2002): 116–19. http://dx.doi.org/10.1055/s-0038-1625086.
Full textYamasita, Alexandre Calura, Nilton Mazzer, and Cláudio Henrique Barbieri. "Desenvolvimento de um software flexível no estudo de regeneração nervosa periférica." Acta Ortopédica Brasileira 16, no. 3 (2008): 177–79. http://dx.doi.org/10.1590/s1413-78522008000300011.
Full textMello, Luis Renato, Yanara Feltrin, Rafael Selbach, Gilberto Macedo Junior, Cleverton Spautz, and Leandro José Haas. "Uso da celulose liofilizada em lesões de nervos periféricos com perda de substância." Arquivos de Neuro-Psiquiatria 59, no. 2B (2001): 372–79. http://dx.doi.org/10.1590/s0004-282x2001000300012.
Full textRibak, Samuel, Paulo Roberto Ferreira da Silva Filho, Alexandre Tietzmann, Helton Hiroshi Hirata, Carlos Augusto de Mattos, and Sérgio Augusto Machado da Gama. "Emprego do enxerto do nervo fibular superficial para tratamento de lesões de nervos periféricos." Revista Brasileira de Ortopedia 51, no. 1 (2016): 63–69. http://dx.doi.org/10.1016/j.rbo.2015.04.029.
Full textFlores, Leandro Pretto. "Neurorrafia término-lateral Uma evolução da técnica de reparo de lesões de nervos periféricos?" Arquivos Brasileiros de Neurocirurgia: Brazilian Neurosurgery 25, no. 02 (2006): 66–73. http://dx.doi.org/10.1055/s-0038-1625485.
Full textPêgo, Amanda Ferraz, Dayna Eleutério, João Paulo Martins Procópio, Victor Augusto Santos Condé, and Eduardo Gonçalves. "Hanseníase: correlação entre o número de lesões hansênicas, nervos afetados e o diagnóstico precoce no estado de Minas Gerais." Revista Eletrônica Acervo Saúde 12, no. 9 (2020): e2188. http://dx.doi.org/10.25248/reas.e2188.2020.
Full textFragelli, Thaís Branquinho Oliveira, Gustavo Azevedo Carvalho, and Diana Lúcia Moura Pinho. "Lesões em músicos: quando a dor supera a arte." Revista Neurociências 16, no. 4 (1999): 303–9. http://dx.doi.org/10.34024/rnc.2008.v16.8621.
Full textDissertations / Theses on the topic "NERVOS PERIFÉRICOS - LESÕES"
Aguilera, Nelio Watanabe. "Avaliação da sensibilidade cutânea em pacientes com lesões agudas de nervos periféricos de membros superiores." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/5/5158/tde-25112010-141859/.
Full textThe human hand has an important sensorial capacity to perceive, to localize and to distinguish simultaneously, in the act of touch. Peripheral nerve injury at upper limb have seriously functional and social disabilities: a hand without sensibility is usually a hand without function. This study has the purpose to use the PSSD (Pressure-specified sensory device) in patients submitted to microsurgical reconstructions of peripheral upper limb nerves to evaluate the cutaneous sensibility recovery. The PSSD is a tool that incorporates a pressure transducer with two prongs, linked to a computer capable of measuring the cutaneous pressure thresholds referred by the patient. In this study, the patients were divided in three groups: patients with median or ulnar nerve trauma at forearm, wrist or digital levels. The statistical analysis method used to compare the groups and considering different moments in the study of 1, 3, 6 and 12 months was the analysis of variance (ANOVA). The results demonstrate interaction between groups where the generalized mean showed statistical relevance for the parameters of the study as well as the time grows. The digital nerve injuries considering all parameters evaluated revealed the smaller values of cutaneous pressure thresholds followed by the results of the wrist and in the last the forearm cutaneous pressure thresholds values. There were no statistical significance between the median and the ulnar nerves considering the values of the cutaneous sensibility thresholds
Ferreira, Telma Leonel. "Elaboração de questionário para avaliação funcional das mãos nas lesões de nervos periféricos." reponame:Repositório Institucional da UnB, 2006. http://repositorio.unb.br/handle/10482/2326.
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A lesão dos nervos periféricos nos membros superiores pode provocar comprometimento da motricidade e da sensibilidade nas mãos, causando limitações nas atividades manuais, que alteram a realização das atividades de vida diária. Essas limitações podem ser avaliadas e quantificadas com o uso de questionários, verificando-se, na literatura, o uso crescente deste instrumento na avaliação funcional dos segmentos corporais. Observou-se que os questionários disponíveis na literatura mundial não avaliam, de forma adequada, a função das mãos nas lesões dos nervos ulnar, mediano e radial. O objetivo deste estudo foi identificar as principais dificuldades que os portadores de lesão isolada ou associada dos nervos ulnar, mediano e radial apresentam nas atividades de vida diária e elaborar um questionário de avaliação funcional capaz de detectar e quantificar estas limitações ou ncapacidades. A pesquisa foi dividida em três etapas. A primeira foi realizada com a entrevista de 50 pacientes adultos, portadores de lesão dos nervos ulnar, mediano e radial para identificar as principais dificuldades manuais apresentadas nas atividades de vida diária. Na segunda etapa, 6 cirurgiões de mão e 9 terapeutas de mão analisaram as atividades listadas pelos pacientes e classificaram essas atividades em ordem crescente de importância para uma avaliação funcional das mãos. Na terceira etapa, a pesquisadora analisou a classificação realizada pelos profissionais e elaborou o questionário de avaliação funcional das mãos. Durante a entrevista com os pacientes, constatou-se a dificuldade na realização de atividades como vestuário, alimentação, higiene pessoal, cuidados com a casa, profissão, lazer, escrita, uso de computador, entre outras. As dificuldades estavam relacionadas com a realização da preensão de precisão, para algumas atividades e, da preensão de força, para outras. O questionário elaborado contém 30 questões objetivas classificadas em 5 categorias. O escore final é obtido pela soma dos escores de cada questão, dividido pelo número de atividades aplicáveis. O instrumento foi respondido por 32 pessoas com seqüela de hanseníase. Com a determinação do coeficiente alfa de Cronbach observou-se que as atividades de número 18 e 19 do questionário apresentavam baixa magnitude e correlação com o total da escala. A exclusão dessas atividades aumentou a confiabilidade do questionário, verificada pelo coeficiente de consistência interna que passou para 0,90, valor considerado altamente satisfatório. __________________________________________________________________________________________ ABSTRACT
The peripheral nerves lesion of the upper limbs may impair the movement and sensation of the hands, causing limitation in the manual activities, which modify the performance of daily life activities. Questionnaires may aid evaluating and quantifying these limitations by checking in the literature, the increasing use of these instruments in the functional evaluation of body segments. We observed that the questionnaires available in the world literature a not suitable to evaluate the function of the hands in the lesions of the ulnar, median and radial nerves. The objective of this study is to identify the main difficulties that isolated or associated ulnar, median and radial nerve lesion patients have in their everyday life, as well as to create a questionnaire of functional evaluation capable of detecting and quantifying these limitations or impairment. The research was divided in three steps. The first step was an interview with 50 adult patients, with ulnar, median and radial nerves disabilities aiming at identifying the main manual difficulties they had in their daily life activities. In the second step, six hand surgeons and nine hand therapists analyzed the activities mentioned by the patients and classified them in an increasing order of importance regarding the functional evaluation of the hands. In the third step, the researcher analyzed the classification done by those professionals and developed a questionnaire to evaluate the function of the hands. During the interview with patients, the difficulties they faced in performing activities such as dressing up, eating, bathing and brushing the teeth, cleaning the house, doing their professional activities, writing, using computer or in their leisure time activities, among others were observed. The difficulties concerned the performance of the accurate grasping movement, for some activities and the strength grasping movement for others. The questionnaire developed contains 30 multiple choice questions classified in five categories. The final score is obtained by summing up the scores of each question and dividing them by the number of relevant activities. This instrument was answered by 32 patients with sequels of Hansen’ disease. By determining Cronbach alfa coefficient we observed that activities numbers 18 and 19 of the questionnaire presented a low importance and interconnection to the total scale. The removal of these activities resulted in a greater reliability of the questionnaire. This was confirmed by the internal consistency which was increased to 0,90, an amount considered highly satisfactory.
Yamasita, Alexandre Calura. "AFNP - Análise funcional dos nervos periféricos: desenvolvimento de um software flexível no estudo de regeneração nervosa periférica." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/82/82131/tde-30072007-150227/.
Full textThe study of the nervous recuperation of peripheral lesions of the sciatic, fibular and tibial, with base in the methods of (De Medinaceli; Freed; Wyatt, 1982), (De Medinaceli; Derenzo; Hunter, 1984), (Carlton; Goldberg, 1986) and (Bain; Mackinnon; Hunter, 1989), obtained through the motive analysis, is considered a good evaluation criterion for the quantification of the degree of nervous evaluation. They can be studied through a wide variety of techniques including the muscular electrophysiology and the morphology. However not even in controlled experimental conditions, a correlation of the regeneration of the peripheral nerves is complete, because they don\'t provide necessary information of the functional state of the nerve. The evaluation of the sensorial function is imprecise and usually indirect due to causes of overlap enervations. Being like this, the explanation for the different functional evaluation methods proposed with the technological progresses and the improvement of the reception methods, storage and processing of the obtained data. The system of functional analysis of the peripheral nerves - AFNP, name given to the software due to its functionality that is of functional analysis of outlying nerves, it presents an interface of easy interaction, work and of presentation of the information to the user, through help information of each context of the system of how to use it. Its precision and the uniformity of the evaluations provided reliable results. The use of graphic resources and reports they can make available the obtained results, through graphs of the averages and of deviations pattern. With the computerization of this process, besides supplying the user a larger agility in the evaluation, it provides the researcher the use of a larger number of animals in the experimental groups, facilitating not only the reception, as well as the storage and the processing of the data. The flexibility was a very important result to be stood out, therefore more than one user has the possibility to interact with the system.
Colomé, Lucas Marques. "Efeito do plasma rico em plaquetas e da eritropoietina na regeneração do nervo ciático de ratos wistar." Pontifícia Universidade Católica do Rio Grande do Sul, 2012. http://hdl.handle.net/10923/4385.
Full textInjuries to the peripheral nervous system present a challenge for regenerative medicine. The study investigated the effects of platelet-rich plasma (PRP) and erythropoietin (EPO), alone or in combination, in the regeneration of peripheral nerve in rats. The work was developed in three phases using 70 rats. The first phase, evaluated the platelet concentration and growth factors production/release (TGF-β, PDGF, VEGF and αβ) in three protocols for obtaining PRP (A, B and C) obtained by aortic or cardiac puncture. Cardiac puncture in association with A protocol showed the best results. In the second stage, using best results methods at the first stage, was produced two PRP concentrations (1,000,000 and 2,000,000 platelets. μl-1; PRP1 and PRP2, respectively) for applying in the rats sciatic nerve. Comparison of concentrations with autologous nerve graft (ANG) and saline solution (SS) groups showed benefits in the use of PRP2. In the third phase (same experimental model) were added PRP2 + EPO and EPO groups. The animals of phases 1 and 2 were evaluated by walking track test and histomorphometric analysis (toluidine blue) and showed benefits in autologous nerve graft (ANG) with respect to tubulization (independent of regenerative factor). For tubularized animals, the study showed advantages for PRP and EPO simultaneous use followed by EPO group. Finally, it was observed that PRP 2,000,000 platelets. μl-1 has beneficial effects when compared to PRP 1,000,000 platelets. μl-1 for peripheral neuroregeneration rats.
Lesões ao sistema nervoso periférico representam um desafio para a medicina regenerativa. O estudo objetivou conhecer os efeitos do plasma rico em plaquetas (PRP) e da eritropoietina (EPO), isolados ou combinados, na regeneração do nervo periférico de ratos. O trabalho desenvolveu-se em três etapas utilizando 70 ratos. A primeira fase avaliou a concentração plaquetária e produção/liberação de fatores de crescimento (TGF-β, PDGF-αβ e VEGF) em três protocolos de obtenção do PRP (A, B e C) obtidos por punção aórtica ou cardíaca. A punção cardíaca em associação com protocolo A gerou os melhores resultados. Na segunda fase, usando os métodos com melhores resultados na primeira etapa, produziram-se duas concentrações de PRP (1. 000. 000 e 2. 000. 000 plaquetas. μl-1; PRP1 e PRP2, respectivamente) para aplicação no nervo ciático tubulizado de ratos. Comparação das concentrações entre si e com grupos auto enxerto (AE) e solução fisiológica (SF) evidenciaram benefícios no uso de PRP2. Na terceira fase (mesmo modelo experimental), foram adicionados os grupos EPO e EPO+PRP2. Os animais das fases 1 e 2 foram avaliados por teste de marcha e histomorfometria (azul de toluidina) e demonstraram que o auto enxerto apresentou benefícios sobre a tubulização (independente do fator regenerativo utilizado). Para os animais tubulizados, o estudo demostrou melhores resultados para o uso simultâneo de PRP e EPO, seguido do grupo EPO. Finalizando, observou-se que a aplicação de PRP na concentração de 2. 000. 000 plaquetas. μl-1 em comparação com 1. 000. 000 platelets. μl- 1 apresentou vantagens para neuroregeneração periférica de ratos.
Selli, Marcelo Fernando. "Desenvolvimento de um método computadorizado para avaliação funcional das lesões de nervos periféricos através da análise da marcha: modelo experimental em ratos." Universidade de São Paulo, 1998. http://www.teses.usp.br/teses/disponiveis/82/82131/tde-26102017-090101/.
Full textHistologic and electrophysiological methods for evaluation of the regeneration of peripheral nerves do not provide data on the actual functional state of the involved limbs, even in controlled experimental conditions. Functional evaluation methods have been proposed, but the correlation between the results obtained and histologic and electromyographic data are not yet well established, what demands more investigations. On the other hand, these require improved methods of acquisition, storing and processing of data obtained either experimentally or clinically. In this work, a computer program was developed to allow for acquisition, storing and processing the images of footprints of rats submitted to different types of lesion to the sciatic, peroneal and tibial nerves, obtained on a walking track, based on the methods proposed by DE MEDINACELI, FREED & WYATT (1982), DE MEDINACELI, DERENZO & WYATT (1984), CARLTON & GOLDBERG (1986) and BAIN, MACKINNON & HUNTER (1989). The program developed is compatible with the Microsoft Windows(TM) NT/95/98 system, permitting the use of graphic resources and generation and printing of the resulting graphics, since it was tested with ongoing experimental studies on the regeneration of the sciatic nerve of rats submitted to different types of treatment. lt was demonstrated that by automatizing and providing evaluation with greater agility, the program permitted the use of a wider number of animais than usual in the experimental groups and the acquisition, storing and processing of a larger volume of informations, allowing for obtaining independent functional indexes for the sciatic, peroneal and tibial nerves, as well as the comparison between the indexes proposed by the above mentioned authors, by graphics of mean and standard deviation. The performance of the program, which is of quick learning and easy to use, was highly satisfactory and the precision and uniformity of the evaluations carried out made the results more reliable.
Goldani, Eduardo. "Efeito do tacrolimus (FK506) aplicado em minibombas de infusão osmótica na regeneração do nervo ciático de ratos wistar." Pontifícia Universidade Católica do Rio Grande do Sul, 2014. http://hdl.handle.net/10923/6974.
Full textIntroduction : Injuries in peripheral nerves are common in clinical practice being responsible for serious problems and often permanent as loss of motor, sensitive functions, acute and chronic pain. Although surgical, physiotherapy and diagnostic techniques have evolved in recent decades, the clinical outcomes of nerve recovery still unsatisfactory, which encourages many researchers to seek drugs and devices that may help regeneration (NOBLE et al, 1998; OLIVEIRA et al, 2004). Various trophic factors, also known as growth factors (GF) are used and tested in vitro and in vivo in an attempt to assist the regeneration of peripheral nerves. These proteins act directly on the proliferation and differentiation of various cell types, being able to promote tissue repair and functional recovery (BOYD AND GORDON, 2003). Among them, we highlight the FK506 (Tacrolimus), a ligand for immunophilins with strong immunosuppressive effect that has potential neurotrophic and neuroprotective actions. Studies have shown that FK506 increases the rate of axonal regeneration and also the level of necessary reinnervation after peripheral nerve injury, besides enhancing recovery from nerve damage. Objective : Evaluating in vivo the availability and effect of FK 506 on the repair of injury of rat sciatic nerve. Material and Methods : Thirty-six male adult Wistar rats were randomized into three groups (I - control, II - Systemic FK506 III - FK506 site;). To evaluate the effect of different treatments, the sciatic nerve of animals was transected, creating a defect of 10 mm and then tubulized with the silicone chamber. In the control group, no additional treatment was performed. In systemic group, FK506 (dose 0. 1 mg/kg/day) was administered systemically via osmotic minipump ALZET while in the local group the administration also occurred through the ALZET osmotic minipump, but adapted to release into the silicone chamber the same dose. The performed treatment lasted 90 days. Results : Data from the present study suggest that the immunosuppressive drug FK506 has a positive effect on the nervous functional improvement and the use of osmotic minipumps is effective in continuous dispensing of the drug. The most important finding of this research is that the degree of functional recovery, measured by the rate of sciatic function after injury with loss of substance and repair through tubing, it is better when FK506 is administered locally whether compared to systemic administration in animal models. No other studies have used local application of the drug with constant release rate for comparison were found.
Introdução : Lesões em nervos periféricos são frequentes na prática clínica sendo responsáveis por problemas graves e muitas vezes permanentes como perda de funções motoras, sensitivas, dor aguda e crônica. Embora as técnicas cirúrgicas, fisioterápicas e de diagnóstico tenham evoluído nas últimas décadas, os desfechos clínicos de recuperação nervosa continuam insatisfatórios, o que estimula diversos pesquisadores a buscarem drogas e dispositivos que possam auxiliar na regeneração (NOBLE et al, 1998; OLIVEIRA et al, 2004). Diversos fatores tróficos, também conhecidos como fatores de crescimento (FC), são utilizados e testados in vitro e in vivo como uma tentativa de auxiliar a regeneração de nervos periféricos. Essas proteínas atuam diretamente na proliferação e diferenciação de diversos tipos celulares, sendo capazes de promover reparo tecidual e recuperação funcional (BOYD E GORDON, 2003). Dentre eles, destaca-se o FK506 (Tacrolimus), um ligante de imunofilinas com forte efeito imunossupressor que apresenta potenciais ações neurotróficas e neuroprotetoras. Estudos têm mostrado que o FK506 aumenta a taxa de regeneração axonal e também o nível de reinervação necessária após lesão do nervo periférico, além de melhorar a recuperação após lesões no nervo. Objetivo : Avaliar in vivo a viabilidade e efeito do FK 506 sobre o reparo de lesão de nervo ciático de ratosMaterial e Métodos : Trinta e seis ratos Wistar, machos, adultos foram randomicamente distribuídos em três grupos (I – controle; II – FK506 sistêmico; III – FK506 local;). Para avaliar o efeito dos diferentes tratamentos, o nervo ciático dos animais foi transeccionado criando um defeito de 10mm e, em seguida, tubulizado com câmara de silicone. No grupo controle, nenhum tratamento adicional foi realizado. No grupo sistêmico, o FK506 (dose 0,1mg/kg/dia) foi administrado sistemicamente via minibomba osmótica ALZET enquanto que no grupo local a administração também ocorreu através da minibomba osmótica ALZET, mas adaptada para liberação dentro da câmara de silicone na mesma dose. O tratamento empregado teve duração de 90 dias. Resultados : Os dados do presente estudo sugerem que a droga imunossupressora FK506 possui efeito positivo na melhora funcional nervosa e o uso de minibombas osmóticas é eficaz na dispensação contínua da droga. O dado mais importante dessa pesquisa é que o grau de recuperação funcional, medido através do índice de função ciática após lesão com perda de substância e reparo através de tubulização, é melhor quando o FK506 é administrado localmente se comparado à administração sistêmica em modelos animais. Não foram encontrados outros trabalhos que tenham usado aplicação local da droga com taxa de liberação constante para efeitos de comparação.
Araújo, Amanda de Souza. "Dor miofascial nas lesões traumáticas do plexo braquial." Escola de Medicina e Saúde Pública, 2013. http://www7.bahiana.edu.br//jspui/handle/bahiana/57.
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A lesão do plexo braquial (LPB) é uma condição frequentemente associada a alterações sensitivas, motoras e a intenso quadro álgico. Pontos-gatilho geradores de dor miofascial podem ser a causa principal de dores musculoesqueléticas ou ocorrer em combinação com outros fatores, mas até o momento, a sua presença não foi investigada nesta população. Objetivo: Estimar a prevalência de dor miofascial em indivíduos com LPB. Método: Trata-se de um estudo transversal realizado com 31 voluntários que sofreram LPB traumática, atendidos no período de dois anos em três centros de referência para o tratamento da LPB. Todos os participantes foram avaliados quanto à presença de pontos-gatilho miofasciais (PGM) em músculos específicos e tiveram dados sociodemográficos e clínicos relacionados à lesão e à dor coletados por uma ficha de avaliação que incluía a Escala Visual Analógica, Brief Pain Inventory, Douleur Neuropathique 4 e McGill Pain Questionnaire. Resultados: A amostra foi composta predominantemente por indivíduos do sexo masculino (93,5%) com idade inferior a 30 anos (58%) e que tiveram como causa da lesão, acidentes motociclísticos (77,4%). A prevalência de dor miofascial foi de 38,7%. Os músculos do lado lesionado foram mais acometidos por PGM do que os contralaterais. Conclusão: Os resultados deste estudo sugerem que componentes miofasciais podem estar envolvidos na dor de indivíduos com lesão traumática do plexo braquial.
Schardosim, Mariane Giacomini. "Confecção de estruturas tubulares permeáveis de PLGA." Pontifícia Universidade Católica do Rio Grande do Sul, 2012. http://hdl.handle.net/10923/3335.
Full textPeripheral nerve injury accident is a common type of lesion that can cause loss of mobility and decrease the quality of life. Despite advances in the biomedical area, there are few cases where there is complete functional recovery of a damaged nerve. The application of biodegradable polymers such as poly(lactide-co-glycolide) (PLGA), shows a viable alternative of treatment in peripheral nerves injuries for presenting mechanical strength, biocompatibility and controlled degradation, being also an excellent material for drug delivery. A PLGA scaffold should be porous with pore sizes on the order of micro-and nanometer, which offers the possibility to insert growth factors, promoting a constant release of these biological structures. The aim of this research is to produce porous scaffolds of PLGA. This was achieved by dissolving the polymer in chloroform, adding a porogenic compound. A titanium rod with 2mm in diameter was deeped in the suspension obtained and dried in a hood, obtaining a layer of PLGA / porogen agent on the surface of the rod. In sequence, the rod was immersed in a solution of PLGA with chloroform. After dried for 2 hours in a hood, the titanium rods were submerged in deionized water for 48 hours, during which the water was changed every 8 hours in order to remove the porogenic agent. After this process, the tubular structures formed were easily removed from the rods. Finally, the prepared tubes were divided into groups and treated with different concentrations of sodium hydroxide, to create pores in the order of nanometers, and subsequently vacuum dried for 48 hours. The structures obtained were characterized by XRD, FTIR, SEM and the in vitro degradation was monitored by GPC.
Danos a nervos periféricos são formas comuns de lesões que podem causar perda de mobilidade e diminuir a qualidade de vida. Apesar dos avanços no campo biomédico, existem poucos casos em que há recuperação funcional completa de um nervo danificado. A aplicação de polímeros biodegradáveis tais como PLGA, apresenta uma alternativa viável no tratamento de lesões de nervos periféricos por possuir resistência mecânica, biocompatibilidade e degradação controlada. Uma matriz de PLGA deve apresentar poros na ordem de micrômetros e nanômetros, oferecendo a possibilidade de inclusão de fatores de crescimento e possivelmente promovendo uma libertação constante destas estruturas biológicas. O objetivo desta pesquisa é produzir matrizes porosas de PLGA. Isto foi realizado através da dissolução do polímero em clorofórmio, seguida da adição de um composto porogênico. Uma haste de titânio com 2mm de diâmetro foi imersa na suspensão obtida e quando retirada, foi seca em capela, obtendo uma camada de PLGA/agente porogênico na superfície da haste. Na sequência, a haste foi imersa em uma solução de PLGA com clorofórmio. Após seca durante 2h em capela, as hastes de titânio foram submersas em água deionizada durante 48h, durante as quais, a água foi trocada a cada 8h, para remoção do agente porogênico. Após este processo, as estruturas tubulares formadas são facilmente removidas das hastes. Finalmente, os tubos confeccionados foram divididos em grupos, e tratados com diferentes concentrações de hidróxido de sódio, para criação de poros na ordem de nanômetros, sendo, subsequentemente, secos em forno a vácuo durante 48h. As estruturas obtidas foram caracterizadas por XRD, FTIR, MEV e a degradação in vitro foi acompanhada por GPC.
Boos, Gisele Silva. "Tumores de bainha de nervo periférico na pele em cães: aspectos histológicos, imuno-histoquímicos e prognóstico." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/85402.
Full textRecently, it was verified that the classification of the peripheral nerve sheath tumours (PNST) is arbitrary, and thus, they have been called benign or malignant PNST. Other neoplasms should be taken into account when such tumours are diagnosed, since they display a similar morphological conformation to hemangiopericytomas and fibromas. Concerning the immunohistochemical (IHC) diagnosis, a variety of markers aiming the identification of cells with peripheral origin is widely used, such as the S-100 protein and the glial fibrillary acidic protein (GFAP). The markers are used in order to differentiate the PNSTs. The main objective of this thesis is to determine the frequency of PNST in dogs diagnosed in the Setor de Patologia Veterinária of the Universidade Federal do Rio Grande do Sul (SPV-UFRGS), but also to determine which breeds, sex, ages and parts of the body are more afflicted. Based on these data, we aimed to describe the histological features, IHC and prognostic of these neoplasms in the studied population. A retrospective study was carried out in the files of the SPV-UFRGS, comprising the period between January 2000 and December 2012. Records of all dogs diagnosed with PNST were revised, as well as the surveys describing what happened with the animals after the tumour diagnostic. New slides were stained with hematoxylin and eosin, Masson’s trichrome and toluidine for histological classification. For IHC, the antibodies anti-vimentin, anti-S-100 protein, anti-actin, anti-GFAP, anti-von Willebrand, anti-neurofilament and Ki-67 were used. Biotin-streptavidin peroxidase method was applied to all the samples. The variables type of tumour (benign or malignant), sex, anisocytosis and anisokariosis, mitotic index, cell proliferation (Ki-67), intratumoral necrosis, invasion into surrounding tissue and location of the tumor, were selected for univariate analysis, and related to tumor recurrence. We selected the variables whose values were of P<0.20 to the multivariate analysis. The variables that passed through the univariate model, were tested to confounding and multicollinearity control.Over the 12 years comprised in this survey, 2,984 skin tumours were diagnosed in dogs. Out of these, 70 (2.34%) corresponded to PNST. Among these, 49 (70%) were benign and 21 (30%) were malignant. The top two most affected breeds were German Shepherd and Poodle. Regarding sex, females represented 55.71% of the samples. The period of time that the animals remained with the tumor until its removal ranged from three weeks to three years. Concerning the distribution of the tumors, 40% were on the forelimbs, 28.57% were on the hind limbs and the remaining were distributed on the trunk, neck, head and tail of the animals. Recurrence was observed in 17 cases. Regarding histology, typical pattern of the PNSTs are more prominent in the benign tumors, in which patterns Antoni A and B are well established. Verocay bodies were observed in a small amount of samples. Low mitotic indexes were presented by both benign and malignant varieties. IHC showed that anti-vimentin and S-100 markers were positive in all samples, except in one of them (vimentin). Other markers were positive in a small number of samples, except actin, which was negative for all samples. Expression of Ki-67 revealed proliferative indexes with no significant statistical difference between malignant and benign tumors. However, multivariate analysis showed that the chances of an animal with malignant tumor develop recurrence was 4.61 times greater than an animal with benign tumor.
Cunha, Núbia Broetto. "Lesão nervosa periférica e envelhecimento : efeitos do treinamento em esteira." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/26063.
Full textBook chapters on the topic "NERVOS PERIFÉRICOS - LESÕES"
AMARAL JUNIOR, F. L., M. C. R. MARVÃO, Bruno Pinto de Oliveira, W. S. LIMA, Á. S. OLIVEIRA FILHO, and A. M. BASTOS. "LESÕES AGUDAS DE NERVOS PERIFÉRICOS." In MANUAL DE EMERGÊNCIAS NEUROCIRÚRGICAS. EDITORA CRV, 2020. http://dx.doi.org/10.24824/978655578646.0.321-328.
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