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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

Bases anatômicas e histomorfométricas para a compreensão das neuropatias dos nervos mediano e ulnar em crianças / Anatomical and histomorphometrical basis for the understanding of median and ulnar nerves neuropathies in children

Luz, Marcus Alexandre Mendes 05 October 2011 (has links)
Orientador: Humberto Santo Neto / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia / Made available in DSpace on 2018-08-18T14:45:14Z (GMT). No. of bitstreams: 1 Luz_MarcusAlexandreMendes_D.pdf: 10387090 bytes, checksum: fb422b3999d7ad8433ea938ee8b28b9f (MD5) Previous issue date: 2011 / Resumo: A região carpal anterior apresenta dois túneis delimitados por tecido fibroso: o túnel do carpo e o túnel ulnar. A importância clínica e cirúrgica dessa região está diretamente ligada às síndromes de compressão nos túneis do carpo e ulnar, comprometendo a função motora. Contudo, a abordagem clínica, tanto para diagnóstico como para o tratamento dessas lesões baseia-se em dados anatômicos de indivíduos adultos, sendo escassas as descrições em crianças. Assim sendo, o presente trabalho tem por objetivo descrever anatomicamente e histologicamente o túnel do carpo e o túnel ulnar em crianças. Foram analisadas 33 mãos de crianças de 2 a 11 anos de idade sem identificação de sexo, provenientes do Laboratório de Anatomia Humana do Departamento de Anatomia, Biologia Celular e Fisiologia e Biofísica do Instituto de Biologia da UNICAMP. Uma amostra de sete peças foi submetida à técnica de ressonância magnética e dissecadas, 14 foram dissecadas e 12 destinadas à histologia. A análise histomorfométrica das estruturas em secção transversal revelou que 58,1% da área do túnel do carpo é ocupada pelos tendões dos músculos flexores superficial e profundo dos dedos, tendão do músculo flexor radial do carpo e tendão do músculo flexor longo do polegar, sendo que 12,1% dessa área é ocupada pelo nervo mediano. Nos dados obtidos das imagens por ressonância magnética, observou-se que o nervo mediano pode assumir duas posições no túnel do carpo: lateral (71,4%) e mediana (28,5%). O túnel ulnar revelou localização palmar, e em 93,8% dos casos observou-se que o limite inferior desse túnel se constitui do retináculo dos músculos flexores e do hâmulo do hamato. Em 16% das amostras analisadas observou-se a artéria acompanhante do nervo mediano persistente, ocupando 1,1% da área do canal do carpo. Em 41,6% das amostras, a densidade de volume de tecido conjuntivo não variou na área de túneis do carpo com maior e menor dimensão, independente do espaço ocupado pelos componentes tendinosos nesse compartimento. De acordo com os dados obtidos, podemos concluir que a anatomia dos componentes neurovasculares dos túneis do carpo e ulnar em crianças apresentam particularidades em relação aos descritos em adultos e devem ser consideradas nas intervenções cirúrgicas / Abstract: The anterior carpal region has two tunnels limited by fibrous tissue: the carpal tunnel and the ulnar tunnel. The clinical and surgical importance of this region is related to the carpal and ulnar tunnel syndromes, both able to impair motor and sensitive functions. The diagnosis and clinical approach to treat these syndromes are mainly based on anatomical features of the tunnels in adults. In children, little is known about the anatomy of these tunnels. In the present study, we describe the anatomy and histology of the carpal and ulnar tunnels in children. Thirty-three hands from children between ages 2 and 11 were studied. Seven samples were submitted to magnetic resonance and dissected; 14 samples were dissected and 12 processed to histology. The histomorphometric analysis in transversal sections showed 58.1% of the areas of the carpal tunnel are occupied by tendons of both superficial and deep flexor muscles of the fingers, by the tendon of the carpal radial flexor muscle and the tendon of the long flexor muscle of the thumb. The median nerve occupied 12.1% of the tunnel area. Magnetic resonance analysis showed that the median nerve was positioned either lateral (71,4%) or median (28,5%) in the carpal tunnel. The ulnar tunnel revealed a palmar location and 93.8% of the samples the inferior limit of the ulnar tunnel was made by the retinaculum of flexor muscles and of the hook of the hamate. In 16% of the samples, an accompanying artery of the median nerve persisted, occupying 1.1% of the area of the carpal tunnel. In 41,6% of the samples the density of the volume of the conjunctive tissue did not change in relation to the dimensions of the carpal tunnel or in relation to the space occupied by the tendons. According to these data, we concluded that the anatomy of the neurovascular components of carpal tunnel and ulnar tunnel in children have individual in relation to those described in adults and these differences may be of relevance to perform safer surgical approaches to the treatment of carpal and ulnar tunnel syndromes / Doutorado / Anatomia / Doutor em Biologia Celular e Estrutural
2

Sensory nerve conduction studies in young adults for the expansion of a reference material

Eriksson, Annika January 2007 (has links)
<p>Neurography is the most objective and reliable measure of the peripheral nerve function, and it is used to diagnose both local and generalized neuropathies. Neurography can measure both motor and sensory nerve functions. The principle for sensory neurgraphy is to stimulate over the nerve and record proximal or distal from the stimulated electrode.</p><p>At the Department of Clinical Neurophysiology, University Hospital Uppsala, a problem has been identified, in that young adult patients tend to show unexpected abnormal neurography values in relation to the expected, indicated by the reference limits, without clinical correlates. This concerns foremost the sensory amplitudes in median and ulnar nerves. The hypothesis is that the requirement of young adults’ amplitudes is too high. A reference material better including more subjects in this age group may solve the problem.</p><p>Sensory nerve conduction studies were performed in 33 subjects, aged 15-30. The nerve functions were tested on median, ulnar and radial nerves. Surface electrodes were used for both recording and stimulation.</p><p>The result shows that the presently used reference material for some nerves indeed has too high requirement for young adults. After increasing the reference material for younger age groups, the new reference limits has been changed and this should cause fewer false positive findings.</p>
3

Sensory nerve conduction studies in young adults for the expansion of a reference material

Eriksson, Annika January 2007 (has links)
Neurography is the most objective and reliable measure of the peripheral nerve function, and it is used to diagnose both local and generalized neuropathies. Neurography can measure both motor and sensory nerve functions. The principle for sensory neurgraphy is to stimulate over the nerve and record proximal or distal from the stimulated electrode. At the Department of Clinical Neurophysiology, University Hospital Uppsala, a problem has been identified, in that young adult patients tend to show unexpected abnormal neurography values in relation to the expected, indicated by the reference limits, without clinical correlates. This concerns foremost the sensory amplitudes in median and ulnar nerves. The hypothesis is that the requirement of young adults’ amplitudes is too high. A reference material better including more subjects in this age group may solve the problem. Sensory nerve conduction studies were performed in 33 subjects, aged 15-30. The nerve functions were tested on median, ulnar and radial nerves. Surface electrodes were used for both recording and stimulation. The result shows that the presently used reference material for some nerves indeed has too high requirement for young adults. After increasing the reference material for younger age groups, the new reference limits has been changed and this should cause fewer false positive findings.
4

BRIDGING A 30 MM DEFECT IN THE CANINE ULNAR NERVE USING VESSEL-CONTAINING CONDUITS WITH IMPLANTATION OF BONE MARROW STROMAL CELLS / 骨髄間葉系細胞移植を行った血管含有神経導管によるイヌ尺骨神経30mm欠損の再建

Kaizawa, Yukitoshi 25 January 2016 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(医学) / 甲第19398号 / 医博第4049号 / 新制||医||1012(附属図書館) / 32423 / 京都大学大学院医学研究科医学専攻 / (主査)教授 戸口田 淳也, 教授 妻木 範行, 教授 井上 治久 / 学位規則第4条第1項該当 / Doctor of Medical Science / Kyoto University / DFAM
5

Towards the Prevention of Handlebar Palsy: The Contribution of Handlebar Shape and Road Grade on Localized Hand Pressures

Russ, Kyle 25 July 2011 (has links)
No description available.
6

Clinical electrophysiological studies of the ulnar and radial nerves in the dog Klinisch electrofysiologisch onderzoek aan de nervus ulnaris en radialis bij de hond (met een samenvatting in het nederlands) /

Nes, Jan Jules van, January 1900 (has links)
Thesis (doctoral)--Rijksuniversiteit te Utrecht, 1985. / "Stellingen": leaves inserted. Vita. Includes bibliographical references.
7

Utilização de plasma rico ou pobre em plaquetas, associado ou não a enxerto ósseo cortical alógeno, na reparação cirúrgica de falha ulnar em ovinos /

Silveira, Patrícia Rodrigues da. January 2009 (has links)
Resumo: A enxertia óssea alógena na ortopedia veterinária é meio seguro e de eleição na reposição de perdas e falhas ósseas em fraturas ou ressecções amplas. A glicerina a 98% é excelente meio de conservação de tecido ósseo, possui efeito bactericida, baixo custo e simplicidade operacional. O plasma rico em plaquetas (PRP) é produto orgânico, derivado do sangue autógeno, utilizado como fonte autógena de fatores de crescimento combinado aos diferentes enxertos e substitutos ósseos. O plasma pobre em plaquetas (PPP) associado ao protocolo de PRP promove melhor cicatrização dos tecidos moles incisados durante o procedimento cirúrgico. Com este estudo objetivou-se, avaliar os efeitos do uso de PRP e PPP associados ou não ao enxerto alógeno de osso cortical conservado em glicerina à 98%, em falhas ósseas ulnares. Foram utilizados 12 ovinos, fêmeas, entre um e dois anos de idade, mestiços da raça Santa Inês, entre 30 a 35 Kg. Os animais foram separados em três grupos de quatro animais cada. Induziu-se, em ambas as ulnas, defeito ósseo de 1,5 cm de comprimento em todo seu diâmetro. A ulna esquerda não recebeu enxertia (controle). No grupo GP implantou-se na ulna direita PRP e PPP. No grupo GO, implantou-se osso cortical alógeno triturado e no grupo GPO implantou-se osso cortical alógeno associado ao PRP e PPP. Comparam-se entre os grupos, a evolução clínica e formação de calo ósseo por exames radiográficos aos 15, 30, 45, 60, 75 e 90 dias de pós-operatório. Os grupos GO e o GPO, durante os períodos de observação, apresentaram melhores resultados na formação de ponte óssea, diminuição da linha de falha óssea e formação de calo ósseo, quando comparados ao grupo GP e a falha sem enxertia (controle), além disso, todos os grupos que receberam enxertia na falha ulnar apresentaram melhores resultados quando comparados à falha controle / Abstract: The allogeneic bone graft in veterinary orthopedics is secure and choice in the replacement of losses and failures in bone fractures or wide resections. A 98% glycerin is an excellent means of preservation of bone tissue, has a bactericidal effect, low cost and operational simplicity. The platelet-rich plasma (PRP) is an organic product derived from the blood was used as a source of autologous growth factors combined with the different grafts and bone substitutes. The platelet-poor plasma (PPP) protocol associated with the PRP promotes better healing of tissues incised during surgery. This study aimed to evaluate the effects of the use of PRP and PPP associated or not with allograft cortical bone preserved in glycerin to 98% in ulnar bone defects. We used 12 sheep, females, between one and two years old, crossbred Santa Inês, between 30 and 35 kg The animals were divided into three groups of four animals each. Was induced in both ulnar, bone defect of 1.5 cm in length across its diameter. The left ulna received no graft (control). In the GP group was implanted in the right ulna PRP and PPP. In the OG, it was implanted cortical bone allografts ground and the group GPO was implanted cortical bone allografts associated with the PRP and PPP. Are compared between the groups, the clinical and callus formation by X-ray examinations at 15, 30, 45, 60, 75 and 90 days postoperatively. The GO group and the GPO during the observation periods, showed better results in the formation of bone bridge, reduction of the fault line and bone callus formation, when compared to the GP and graft failure without (control), in addition, all the groups that received the graft failure ulnar showed better results when compared to control failure / Orientador: João Guilherme Padilha Filho / Coorientador: Julio Carlos Canola / Banca: Claudia Sampaio Fonseca Repetti / Banca: Celso Sanches Braccialli / Banca: Paola Castro Moraes / Banca: José Luiz Laus / Doutor
8

Utilização de plasma rico ou pobre em plaquetas, associado ou não a enxerto ósseo cortical alógeno, na reparação cirúrgica de falha ulnar em ovinos

Silveira, Patrícia Rodrigues da [UNESP] 27 November 2009 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:31:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-11-27Bitstream added on 2014-06-13T20:22:00Z : No. of bitstreams: 1 silveira_pr_dr_jabo.pdf: 1251184 bytes, checksum: c14c8c497ca5fcdc179d3dc025b5629c (MD5) / A enxertia óssea alógena na ortopedia veterinária é meio seguro e de eleição na reposição de perdas e falhas ósseas em fraturas ou ressecções amplas. A glicerina a 98% é excelente meio de conservação de tecido ósseo, possui efeito bactericida, baixo custo e simplicidade operacional. O plasma rico em plaquetas (PRP) é produto orgânico, derivado do sangue autógeno, utilizado como fonte autógena de fatores de crescimento combinado aos diferentes enxertos e substitutos ósseos. O plasma pobre em plaquetas (PPP) associado ao protocolo de PRP promove melhor cicatrização dos tecidos moles incisados durante o procedimento cirúrgico. Com este estudo objetivou-se, avaliar os efeitos do uso de PRP e PPP associados ou não ao enxerto alógeno de osso cortical conservado em glicerina à 98%, em falhas ósseas ulnares. Foram utilizados 12 ovinos, fêmeas, entre um e dois anos de idade, mestiços da raça Santa Inês, entre 30 a 35 Kg. Os animais foram separados em três grupos de quatro animais cada. Induziu-se, em ambas as ulnas, defeito ósseo de 1,5 cm de comprimento em todo seu diâmetro. A ulna esquerda não recebeu enxertia (controle). No grupo GP implantou-se na ulna direita PRP e PPP. No grupo GO, implantou-se osso cortical alógeno triturado e no grupo GPO implantou-se osso cortical alógeno associado ao PRP e PPP. Comparam-se entre os grupos, a evolução clínica e formação de calo ósseo por exames radiográficos aos 15, 30, 45, 60, 75 e 90 dias de pós-operatório. Os grupos GO e o GPO, durante os períodos de observação, apresentaram melhores resultados na formação de ponte óssea, diminuição da linha de falha óssea e formação de calo ósseo, quando comparados ao grupo GP e a falha sem enxertia (controle), além disso, todos os grupos que receberam enxertia na falha ulnar apresentaram melhores resultados quando comparados à falha controle / The allogeneic bone graft in veterinary orthopedics is secure and choice in the replacement of losses and failures in bone fractures or wide resections. A 98% glycerin is an excellent means of preservation of bone tissue, has a bactericidal effect, low cost and operational simplicity. The platelet-rich plasma (PRP) is an organic product derived from the blood was used as a source of autologous growth factors combined with the different grafts and bone substitutes. The platelet-poor plasma (PPP) protocol associated with the PRP promotes better healing of tissues incised during surgery. This study aimed to evaluate the effects of the use of PRP and PPP associated or not with allograft cortical bone preserved in glycerin to 98% in ulnar bone defects. We used 12 sheep, females, between one and two years old, crossbred Santa Inês, between 30 and 35 kg The animals were divided into three groups of four animals each. Was induced in both ulnar, bone defect of 1.5 cm in length across its diameter. The left ulna received no graft (control). In the GP group was implanted in the right ulna PRP and PPP. In the OG, it was implanted cortical bone allografts ground and the group GPO was implanted cortical bone allografts associated with the PRP and PPP. Are compared between the groups, the clinical and callus formation by X-ray examinations at 15, 30, 45, 60, 75 and 90 days postoperatively. The GO group and the GPO during the observation periods, showed better results in the formation of bone bridge, reduction of the fault line and bone callus formation, when compared to the GP and graft failure without (control), in addition, all the groups that received the graft failure ulnar showed better results when compared to control failure
9

Jämförelse av motorisk ledningshastighet och proximal latenstid i underarmen och över armbågen samt mellan höger och vänster arm i nervus ulnaris / Comparison of motor conduction velocity and proximal latency in the forearm and above the elbow and between the right and left arms of the ulnar nerve

Akash, Hala January 2023 (has links)
Introduktion: Det perifera nervsystemet består av det autonoma nervsystemet och de perifera nervtrådarna som förmedlar afferenta och efferenta impulser mellan det centrala nervsystemet och perifera delen av kroppen. Från plexus brachialis förgrenar nervus ulnaris sig och fortsätter längst armen till handens ulnara del. Den vanligaste perifera nervskadan i övre extremiteter är ulnarisnervskada. Syftet: Syftet med studien var att undersöka om det förekommer någon signifikant skillnad i motorisk ledningshastighet (MCV) mellan underarm och över armbåge på nervus ulnaris bilateralt. Även att jämföra MCV och proximal latenstid mellan höger och vänster underarm och över armbåge. Metod: För att besvara syftet utfördes en tvärsnittsstudie på 31 friska deltagare i åldrarna 20– 40 år. Nervus ulnaris undersöktes med elektroneurografi bilateralt. Resultat: Resultatet visade att det förekommer en signifikant skillnad i MCV mellan underarm och över armbågen bilateralt på nervus ulnaris. Det påvisades en signifikant skillnad i MCV mellan höger och vänster sida över armbågen, men inte på underarm. Ingen signifikant skillnad förekommer i proximala latenstiden mellan höger och vänster underarm och över armbågen. Slutsats: De signifikanta skillnaderna som erhölls i MCV mellan underarm och över armbåge samt mellan höger och vänster sida över armbågen kan bero på stimuleringstekniken. Såsom armspositionen vid stimuleringen och att överarmar är generellt svårare att undersöka. Detta medför större risk för felkällor som kan påverka resultatet. / Introduction: The peripheral nervous system consists of the autonomic nervous system and the peripheral nerve fibers that mediate afferent and efferent impulses between the central nervous system and the peripheral part of the body. From the brachial plexus, the ulnar nerve branches and continues along the arm to the ulnar part of the hand. The most common and largest peripheral nerve injury in the upper extremities is ulnar nerve injury. Aim: The aim of the study was to investigate whether there is any significant difference in motor conduction velocity (MCV) between the forearm and above the elbow on the ulnar nerve bilaterally. Also, to compare MCV and proximal latency between right and left forearm and above elbow. Method: To answer the purpose, a cross-sectional study was performed on 30 healthy participants aged 20–40 years. The ulnar nerve was examined with electroneurography bilaterally. Results: The result showed that there is a significant difference in MCV between the forearm and above the elbow bilaterally on the ulnar nerve. A significant difference in MCV was demonstrated between the right and left sides over the elbow, but not on the forearm. There was no significant difference in the proximal latency between the right and left forearm and above the elbow. Conclusion: The significant differences obtained in MCV between forearm and above elbow and between right and left side above elbow may be due to the simulation technique. Such as the arm position during the stimulation and that upper arms are generally more difficult to examine. This entails a greater risk of error sources that can affect the result.
10

Avaliação da sensibilidade cutânea em pacientes com lesões agudas de nervos periféricos de membros superiores / Assessment the cutaneous sensibility in acute peripheral upper limb nerve trauma

Aguilera, Nelio Watanabe 10 November 2010 (has links)
A mão humana desempenha a função de um órgão sensorial de percepção, localização e discriminação `a estimulação cutânea. A injúria de nervos periféricos em membros superiores é uma condição com repercurssões funcionais e sociais graves pois, uma mão sem sensibilidade é usualmente uma mão sem função. O objetivo deste estudo é descrever a utilização do PSSD (Pressure- specified sensory device ) como auxiliar ao seguimento dos índices de recuperação da sensibilidade cutânea em pacientes submetidos a reconstruções microcirúrgicas de lesões traumáticas de nervos periféricos de membros superiores. O PSSD consiste de um aparelho que incorpora um transdutor de pressão com duas extremidades rombas e com regulagem de distância entre elas, acoplado a um computador capaz de determinar os limiares cutâneos de pressão para os parâmetros de 1 ponto estático, 1 ponto dinâmico e respectivos 2 pontos. No estudo, os pacientes foram divididos em três grupos: pacientes com lesões de n. mediano e/ou n. ulnar em nível do antebraço, punho e dedos. O teste estatístico utilizado para análise das comparações, tanto entre os grupos quanto para os diferentes momentos considerados de 1, 3, 6 e 12 meses foi a Análise de Variância (ANOVA) com Medidas Repetidas. Os resultados demonstraram haver interação entre os grupos onde, em média, houve diferença estatística (p<0,05) para os parâmetros considerados, a medida que, se aumenta o tempo de avaliação. As lesões digitais, para todos os parâmetros avaliados, apresentaram menores valores dos limiares cutâneos de pressão seguidos do punho e antebraço e não se evidenciou diferença estatística (p>0,05) entre os resultados dos limiares cutâneos de pressão nos nervos mediano e ulnar / The 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

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