Rui de Barros - Academia.edu (original) (raw)
Papers by Rui de Barros
Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015)
Revista Da Associacao Medica Brasileira, 2023
Revista da Sociedade Brasileira de Clínica Médica, 2018
Jornal Vascular Brasileiro, Mar 1, 2017
Journal of Surgical Research, 2018
Journal of Reconstructive Microsurgery, Jul 21, 2011
An alternative method of magnification for microvascular anastomosis was analyzed using an ordina... more An alternative method of magnification for microvascular anastomosis was analyzed using an ordinary video camera and compared with the traditional method under microscope. For this study 20 rats were divided in two groups of 10 each: control group (microscope-assisted [M]) and experimental group (video-assisted [V]). Magnification was accomplished by a surgical microscope in group M, whereas a video system composed of low-cost camera, audiovisual cable, and analogue television in group V. In both groups, the right femoral artery was severed and sutured with interrupted simple stitches. The criteria examined were: patency, vessel diameter, amount of sutures, anastomosis time, and histologic features. There were no differences between both groups in patency rate and vessel diameter. The video-assisted microanastomosis is a time-consuming procedure as compared with the microscope-assisted anastomosis, to a certain extent due to lack of stereoscopic image and technical inability with the video system as well. There was a smaller quantity of sutures in group V. Higher foreign body tissue reaction was found in group M, consequent to greater amount of suture material. In conclusion, video-assisted microanastomosis is possible with the present video system but is not as safe as conventional microanastomosis.
Acta Cirurgica Brasileira, 2022
Acta Cirurgica Brasileira, 2022
Arquivos brasileiros de cirurgia digestiva : ABCD = Brazilian archives of digestive surgery
Food is a key factor both in prevention and in promoting human health. Among the functional food ... more Food is a key factor both in prevention and in promoting human health. Among the functional food are highlighted probiotics and prebiotics. Patent databases are the main source of technological information about innovation worldwide, providing extensive library for research sector. Perform mapping in the main patent databases about pre and probiotics, seeking relevant information regarding the use of biotechnology, nanotechnology and genetic engineering in the production of these foods. Electronic consultation was conducted (online) in the main public databases of patents in Brazil (INPI), United States (USPTO) and the European Patent Bank (EPO). The research involved the period from January 2014 to July 2015, being used in the title fields and summary of patents, the following descriptors in INPI "prebiotic", "prebiotic" "probiotics", "probiotic" and the USPTO and EPO: "prebiotic", "prebiotics", "probiotic", &quo...
Acta Cirurgica Brasileira, Sep 1, 2017
Surgical Innovation, Apr 24, 2017
Background: Although all microsurgeries are based on the use of surgical microscopes, several alt... more Background: Although all microsurgeries are based on the use of surgical microscopes, several alternative magnification systems have shown promising results. Improvements in image quality facilitated the use of video systems in microsurgeries with safety and accuracy. The aim of this study was to evaluate the use of a low-cost, video-assisted magnification system in peripheral neurorrhaphy in rats. Methods: Twenty Wistar rats were randomly divided into 2 matched groups according to the magnification system used: the microscope group, with neurorrhaphy performed under a microscope with an image magnification of 40×; and the video system group, with the procedures performed under a video system composed of a high-definition Sony camcorder DCR-SR42 set to 52× magnification, macro lenses, 42-inch television, and a digital HDMI cable. We analyzed weight, nerve caliber, total surgery time, neurorrhaphy time, number of stitches, and number of axons in both ends (proximal and distal). Results: There were no significant differences between groups in weight, nerve caliber, or number of stitches. Neurorrhaphy under the video system took longer (video: 5.60 minutes; microscope: 3.20 minutes; P < .05). Number of axons was similar between groups, both in proximal and distal stumps. Conclusion: It is possible to perform a peripheral neurorrhaphy in rats through video system magnification, but with a longer surgical time.
Revista de Ciência Veterinária e Saúde Pública, 2018
O presente estudo tem como objetivo sistematizar e descrever os ramos do arco aórtico e suas prin... more O presente estudo tem como objetivo sistematizar e descrever os ramos do arco aórtico e suas principais ramificações em coelhos da raça Nova Zelândia, estabelecendo um modelo padrão e suas principais variações anatômicas. Foram usados 16 coelhos adultos (Oryctologus cuniculus) New Zeland, pesando 2-3 kg e com 10-12 meses. Os animais foram submetidos à associação de Cetamina (70 mg/kg) e Xilazina (10 mg/kg) por via subcutânea. Posteriormente, realizou-se a heparinização com 5000 UI por meio da artéria femoral. Foi aguardado 10 minutos e seguiu-se com a eutanásia do animal usando sobredose da associação anestésica. Após, seguiu-se com a abertura da cavidade torácica. A aorta dos coelhos iniciou a partir do ventrículo esquerdo com um diâmetro médio de 5,4 ±0,6mm em seu maior eixo. A aorta projetou-se dorso-crânio-lateralmente à esquerda, em todos os animais estudados, formando o arco aórtico. O tronco arterial braquiocefálico apresentou um diâmetro de 3,8 ±0,4mm em sua eminência. Fora...
Jornal Vascular Brasileiro
Resumo Contexto A produção científica brasileira cresce de forma quantitativa e qualitativa a cad... more Resumo Contexto A produção científica brasileira cresce de forma quantitativa e qualitativa a cada década. Entretanto, há uma desvalorização dos periódicos brasileiros demonstrada através da baixa quantidade de citações em comparação a textos de revistas internacionais, com justificativa subentendida de que há superioridade qualitativa de artigos estrangeiros. Objetivos Verificar a diferença entre o número de citações de periódicos nacionais e internacionais em três revistas brasileiras no período de 2016 a 2020. Métodos Foram analisados todos os artigos publicados na Revista do Colégio Brasileiro de Cirurgiões, no Jornal Vascular Brasileiro e na Acta Cirúrgica Brasileira no intervalo de 2016 a 2020. Os estudos selecionados tiveram suas referências avaliadas, sendo contabilizado o número total de citações e se eram provenientes de periódicos brasileiros ou de periódicos estrangeiros. Resultados Foram analisados 902 artigos, totalizando 23.394 referências, com média de 25,81 ± 8,59 p...
Revista Brasileira De Ortopedia, Nov 1, 2014
Objective: To evaluate whether there is any preference for citing journals from other countries t... more Objective: To evaluate whether there is any preference for citing journals from other countries to the detriment of Brazilian journals, in three Brazilian orthopedics journals. Methods: All the references of articles published in 2011 by the journals Acta Ortopédica Brasileira, Coluna/Columna and Revista Brasileira de Ortopedia were evaluated to as certain how many of these came from Brazilian journals and how many from foreign journals. Results: 3813 references distributed among 187 articles were analyzed. Out of this total, 306 (8.02%) were from Brazilian journals. There was no difference between the three journals analyzed. There were 76 articles (40.64%) without any citations of articles in Brazilian journals and only two articles (1%) cited more Brazilian articles than articles published elsewhere. Conclusion: There is a need for Brazilian researchers to cite articles from Brazilian journals more often.
Acta Cirurgica Brasileira, 2022
To study the anatomorphometry of the plexus brachialis (PB) of rats under a high-definition video... more To study the anatomorphometry of the plexus brachialis (PB) of rats under a high-definition video system. Methods: Ten male Wistar rats discarded from other research that did not interfere in the morphology of the animal, respecting the principle of reduction, were used. All animals were submitted to the same protocol. Initially, the cervical region was shaved. The animals were placed in a dorsal position. A single elbow-to-elbow incision was performed and dissection started at the deltopectoral sulcus. The procedures were performed under a video system. To measure the structures, the Image J software was used. Results: All the PB evaluated originated from the C5-T1 spinal nerves. C5 and C6 converged to form the truncus superior, the root of C7 originated the truncus medius, and the confluence of C8 and T1 originated the truncus inferior. It was found the union of C7, C8, and T1 to form truncus inferomedialis instead of separate medial and inferior truncus. C8 (1.31 mm) was the thickest root, the truncus inferior (1.80 mm) and the nerve radialis (1.02 mm), were the thickest. Conclusion: The anatomy of the PB is comparable to humans, admitting variations. The videomagnification system is useful to perform microsurgical dissection.
Jornal Vascular Brasileiro
Background The quantity and quality of Brazilian scientific output increases decade by decade. Ho... more Background The quantity and quality of Brazilian scientific output increases decade by decade. However, there is a tendency to undervalue Brazilian journals, illustrated by the low number of citations compared with texts in international journals, with the tacit justification that foreign articles are of superior quality. Objectives To investigate the differences in numbers of citations of Brazilian and international periodicals in three Brazilian journals from 2016 to 2020. Methods All articles published in the Journal of the Brazilian College of Surgeons, in the Jornal Vascular Brasileiro, and in Acta Cirúrgica Brasileira from 2016 to 2020 were analyzed. The references of these studies were analyzed, summing the total number of citations and classifying them as published in Brazilian or foreign journals. Results A total of 902 articles were analyzed, totaling 23,394 references, with a mean of 25.81 ± 8.59 references per article. Of these, 2,680 (11.45%) were Brazilian, equating to...
Surgical Innovation, 2020
Background. A literature review of the use of video systems for magnification has suggested that ... more Background. A literature review of the use of video systems for magnification has suggested that so far, this novel magnification system has only been used to perform arterial anastomoses. The aim of this study was to evaluate the use of 2 low-cost methods of video-assisted magnification in microvascular venous anastomosis in rats. Methods. Thirty rats were randomly divided into 3 matched groups according to the magnification system used: the microscope group, with venous anastomosis performed under a microscope; the camcorder system group, with the procedures performed under a high-definition Handycam HDR-XR160; and the Photographic camera group, for which procedures were performed with an EOS Rebel T3i photographic camera. In both video system groups, a magnification system was connected to a 42-in. television by an HDMI cable. We analyzed weight, venous caliber, total surgery and anastomosis time, patency immediately and 14 days postoperatively, number of stitches, and histologic...
Revista Brasileira de Ortopedia, Nov 1, 2014
Artigo de revista Fator de impacto Bibliografia como assunto r e s u m o Objetivo: Avaliar se há ... more Artigo de revista Fator de impacto Bibliografia como assunto r e s u m o Objetivo: Avaliar se há preferência pela citação de periódicos internacionais em detrimento dos nacionais em três revistas nacionais de ortopedia. Métodos: Foram avaliadas todas as referências dos artigos publicados em 2011 pelas revistas Acta Ortopédica Brasileira, Coluna/Columna e Revista Brasileira de Ortopedia, para verificar a quantidade de artigos provenientes de revistas nacionais e internacionais. Resultados: Foram analisadas 3.813 referências dispostas em 187 artigos. Desse total, 306 (8,02%) eram de periódicos nacionais. Não houve diferença entre as três revistas analisadas, 76 (40,64%) dos artigos não citaram artigo de periódico nacional e dois (1%) dos artigos citaram mais artigos nacionais do que internacionais. Conclusão: Há necessidade de o pesquisador nacional citar mais os artigos provenientes de periódicos nacionais.
OBJETIVO: Descrever um modelo de treinamento de baixo custo de disseccao e acesso vascular utiliz... more OBJETIVO: Descrever um modelo de treinamento de baixo custo de disseccao e acesso vascular utilizando lingua bovina. METODOS: Foram utilizadas dez linguas de boi para confeccao de simuladores. Inicialmente, o corpo da lingua foi dissecado, separando as camadas epitelial e muscular, e o pediculo vascular foi destacado da base da lingua. A arteria principal da lingua foi, entao, cateterizada e conectada a uma seringa, sendo, em seguida, fixada a porcao muscular. Apos, para simular o tecido celular subcutâneo, foi confeccionada uma pasta amarela gelatinosa, que foi posicionada de modo a cobrir a extensao do pediculo vascular por inteiro. Por fim, a camada epitelial da lingua foi reposicionada sob a camada muscular, por meio de sutura continua. Para avaliar o modelo, foram observados o tempo de confeccao do modelo, sua durabilidade, seu custo e o numero de vezes que pode ser usado. RESULTADOS: O tempo medio para confeccao do modelo foi de 15,82±2,45 minutos, com durabilidade de 20 dias ...
Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015)
Revista Da Associacao Medica Brasileira, 2023
Revista da Sociedade Brasileira de Clínica Médica, 2018
Jornal Vascular Brasileiro, Mar 1, 2017
Journal of Surgical Research, 2018
Journal of Reconstructive Microsurgery, Jul 21, 2011
An alternative method of magnification for microvascular anastomosis was analyzed using an ordina... more An alternative method of magnification for microvascular anastomosis was analyzed using an ordinary video camera and compared with the traditional method under microscope. For this study 20 rats were divided in two groups of 10 each: control group (microscope-assisted [M]) and experimental group (video-assisted [V]). Magnification was accomplished by a surgical microscope in group M, whereas a video system composed of low-cost camera, audiovisual cable, and analogue television in group V. In both groups, the right femoral artery was severed and sutured with interrupted simple stitches. The criteria examined were: patency, vessel diameter, amount of sutures, anastomosis time, and histologic features. There were no differences between both groups in patency rate and vessel diameter. The video-assisted microanastomosis is a time-consuming procedure as compared with the microscope-assisted anastomosis, to a certain extent due to lack of stereoscopic image and technical inability with the video system as well. There was a smaller quantity of sutures in group V. Higher foreign body tissue reaction was found in group M, consequent to greater amount of suture material. In conclusion, video-assisted microanastomosis is possible with the present video system but is not as safe as conventional microanastomosis.
Acta Cirurgica Brasileira, 2022
Acta Cirurgica Brasileira, 2022
Arquivos brasileiros de cirurgia digestiva : ABCD = Brazilian archives of digestive surgery
Food is a key factor both in prevention and in promoting human health. Among the functional food ... more Food is a key factor both in prevention and in promoting human health. Among the functional food are highlighted probiotics and prebiotics. Patent databases are the main source of technological information about innovation worldwide, providing extensive library for research sector. Perform mapping in the main patent databases about pre and probiotics, seeking relevant information regarding the use of biotechnology, nanotechnology and genetic engineering in the production of these foods. Electronic consultation was conducted (online) in the main public databases of patents in Brazil (INPI), United States (USPTO) and the European Patent Bank (EPO). The research involved the period from January 2014 to July 2015, being used in the title fields and summary of patents, the following descriptors in INPI "prebiotic", "prebiotic" "probiotics", "probiotic" and the USPTO and EPO: "prebiotic", "prebiotics", "probiotic", &quo...
Acta Cirurgica Brasileira, Sep 1, 2017
Surgical Innovation, Apr 24, 2017
Background: Although all microsurgeries are based on the use of surgical microscopes, several alt... more Background: Although all microsurgeries are based on the use of surgical microscopes, several alternative magnification systems have shown promising results. Improvements in image quality facilitated the use of video systems in microsurgeries with safety and accuracy. The aim of this study was to evaluate the use of a low-cost, video-assisted magnification system in peripheral neurorrhaphy in rats. Methods: Twenty Wistar rats were randomly divided into 2 matched groups according to the magnification system used: the microscope group, with neurorrhaphy performed under a microscope with an image magnification of 40×; and the video system group, with the procedures performed under a video system composed of a high-definition Sony camcorder DCR-SR42 set to 52× magnification, macro lenses, 42-inch television, and a digital HDMI cable. We analyzed weight, nerve caliber, total surgery time, neurorrhaphy time, number of stitches, and number of axons in both ends (proximal and distal). Results: There were no significant differences between groups in weight, nerve caliber, or number of stitches. Neurorrhaphy under the video system took longer (video: 5.60 minutes; microscope: 3.20 minutes; P < .05). Number of axons was similar between groups, both in proximal and distal stumps. Conclusion: It is possible to perform a peripheral neurorrhaphy in rats through video system magnification, but with a longer surgical time.
Revista de Ciência Veterinária e Saúde Pública, 2018
O presente estudo tem como objetivo sistematizar e descrever os ramos do arco aórtico e suas prin... more O presente estudo tem como objetivo sistematizar e descrever os ramos do arco aórtico e suas principais ramificações em coelhos da raça Nova Zelândia, estabelecendo um modelo padrão e suas principais variações anatômicas. Foram usados 16 coelhos adultos (Oryctologus cuniculus) New Zeland, pesando 2-3 kg e com 10-12 meses. Os animais foram submetidos à associação de Cetamina (70 mg/kg) e Xilazina (10 mg/kg) por via subcutânea. Posteriormente, realizou-se a heparinização com 5000 UI por meio da artéria femoral. Foi aguardado 10 minutos e seguiu-se com a eutanásia do animal usando sobredose da associação anestésica. Após, seguiu-se com a abertura da cavidade torácica. A aorta dos coelhos iniciou a partir do ventrículo esquerdo com um diâmetro médio de 5,4 ±0,6mm em seu maior eixo. A aorta projetou-se dorso-crânio-lateralmente à esquerda, em todos os animais estudados, formando o arco aórtico. O tronco arterial braquiocefálico apresentou um diâmetro de 3,8 ±0,4mm em sua eminência. Fora...
Jornal Vascular Brasileiro
Resumo Contexto A produção científica brasileira cresce de forma quantitativa e qualitativa a cad... more Resumo Contexto A produção científica brasileira cresce de forma quantitativa e qualitativa a cada década. Entretanto, há uma desvalorização dos periódicos brasileiros demonstrada através da baixa quantidade de citações em comparação a textos de revistas internacionais, com justificativa subentendida de que há superioridade qualitativa de artigos estrangeiros. Objetivos Verificar a diferença entre o número de citações de periódicos nacionais e internacionais em três revistas brasileiras no período de 2016 a 2020. Métodos Foram analisados todos os artigos publicados na Revista do Colégio Brasileiro de Cirurgiões, no Jornal Vascular Brasileiro e na Acta Cirúrgica Brasileira no intervalo de 2016 a 2020. Os estudos selecionados tiveram suas referências avaliadas, sendo contabilizado o número total de citações e se eram provenientes de periódicos brasileiros ou de periódicos estrangeiros. Resultados Foram analisados 902 artigos, totalizando 23.394 referências, com média de 25,81 ± 8,59 p...
Revista Brasileira De Ortopedia, Nov 1, 2014
Objective: To evaluate whether there is any preference for citing journals from other countries t... more Objective: To evaluate whether there is any preference for citing journals from other countries to the detriment of Brazilian journals, in three Brazilian orthopedics journals. Methods: All the references of articles published in 2011 by the journals Acta Ortopédica Brasileira, Coluna/Columna and Revista Brasileira de Ortopedia were evaluated to as certain how many of these came from Brazilian journals and how many from foreign journals. Results: 3813 references distributed among 187 articles were analyzed. Out of this total, 306 (8.02%) were from Brazilian journals. There was no difference between the three journals analyzed. There were 76 articles (40.64%) without any citations of articles in Brazilian journals and only two articles (1%) cited more Brazilian articles than articles published elsewhere. Conclusion: There is a need for Brazilian researchers to cite articles from Brazilian journals more often.
Acta Cirurgica Brasileira, 2022
To study the anatomorphometry of the plexus brachialis (PB) of rats under a high-definition video... more To study the anatomorphometry of the plexus brachialis (PB) of rats under a high-definition video system. Methods: Ten male Wistar rats discarded from other research that did not interfere in the morphology of the animal, respecting the principle of reduction, were used. All animals were submitted to the same protocol. Initially, the cervical region was shaved. The animals were placed in a dorsal position. A single elbow-to-elbow incision was performed and dissection started at the deltopectoral sulcus. The procedures were performed under a video system. To measure the structures, the Image J software was used. Results: All the PB evaluated originated from the C5-T1 spinal nerves. C5 and C6 converged to form the truncus superior, the root of C7 originated the truncus medius, and the confluence of C8 and T1 originated the truncus inferior. It was found the union of C7, C8, and T1 to form truncus inferomedialis instead of separate medial and inferior truncus. C8 (1.31 mm) was the thickest root, the truncus inferior (1.80 mm) and the nerve radialis (1.02 mm), were the thickest. Conclusion: The anatomy of the PB is comparable to humans, admitting variations. The videomagnification system is useful to perform microsurgical dissection.
Jornal Vascular Brasileiro
Background The quantity and quality of Brazilian scientific output increases decade by decade. Ho... more Background The quantity and quality of Brazilian scientific output increases decade by decade. However, there is a tendency to undervalue Brazilian journals, illustrated by the low number of citations compared with texts in international journals, with the tacit justification that foreign articles are of superior quality. Objectives To investigate the differences in numbers of citations of Brazilian and international periodicals in three Brazilian journals from 2016 to 2020. Methods All articles published in the Journal of the Brazilian College of Surgeons, in the Jornal Vascular Brasileiro, and in Acta Cirúrgica Brasileira from 2016 to 2020 were analyzed. The references of these studies were analyzed, summing the total number of citations and classifying them as published in Brazilian or foreign journals. Results A total of 902 articles were analyzed, totaling 23,394 references, with a mean of 25.81 ± 8.59 references per article. Of these, 2,680 (11.45%) were Brazilian, equating to...
Surgical Innovation, 2020
Background. A literature review of the use of video systems for magnification has suggested that ... more Background. A literature review of the use of video systems for magnification has suggested that so far, this novel magnification system has only been used to perform arterial anastomoses. The aim of this study was to evaluate the use of 2 low-cost methods of video-assisted magnification in microvascular venous anastomosis in rats. Methods. Thirty rats were randomly divided into 3 matched groups according to the magnification system used: the microscope group, with venous anastomosis performed under a microscope; the camcorder system group, with the procedures performed under a high-definition Handycam HDR-XR160; and the Photographic camera group, for which procedures were performed with an EOS Rebel T3i photographic camera. In both video system groups, a magnification system was connected to a 42-in. television by an HDMI cable. We analyzed weight, venous caliber, total surgery and anastomosis time, patency immediately and 14 days postoperatively, number of stitches, and histologic...
Revista Brasileira de Ortopedia, Nov 1, 2014
Artigo de revista Fator de impacto Bibliografia como assunto r e s u m o Objetivo: Avaliar se há ... more Artigo de revista Fator de impacto Bibliografia como assunto r e s u m o Objetivo: Avaliar se há preferência pela citação de periódicos internacionais em detrimento dos nacionais em três revistas nacionais de ortopedia. Métodos: Foram avaliadas todas as referências dos artigos publicados em 2011 pelas revistas Acta Ortopédica Brasileira, Coluna/Columna e Revista Brasileira de Ortopedia, para verificar a quantidade de artigos provenientes de revistas nacionais e internacionais. Resultados: Foram analisadas 3.813 referências dispostas em 187 artigos. Desse total, 306 (8,02%) eram de periódicos nacionais. Não houve diferença entre as três revistas analisadas, 76 (40,64%) dos artigos não citaram artigo de periódico nacional e dois (1%) dos artigos citaram mais artigos nacionais do que internacionais. Conclusão: Há necessidade de o pesquisador nacional citar mais os artigos provenientes de periódicos nacionais.
OBJETIVO: Descrever um modelo de treinamento de baixo custo de disseccao e acesso vascular utiliz... more OBJETIVO: Descrever um modelo de treinamento de baixo custo de disseccao e acesso vascular utilizando lingua bovina. METODOS: Foram utilizadas dez linguas de boi para confeccao de simuladores. Inicialmente, o corpo da lingua foi dissecado, separando as camadas epitelial e muscular, e o pediculo vascular foi destacado da base da lingua. A arteria principal da lingua foi, entao, cateterizada e conectada a uma seringa, sendo, em seguida, fixada a porcao muscular. Apos, para simular o tecido celular subcutâneo, foi confeccionada uma pasta amarela gelatinosa, que foi posicionada de modo a cobrir a extensao do pediculo vascular por inteiro. Por fim, a camada epitelial da lingua foi reposicionada sob a camada muscular, por meio de sutura continua. Para avaliar o modelo, foram observados o tempo de confeccao do modelo, sua durabilidade, seu custo e o numero de vezes que pode ser usado. RESULTADOS: O tempo medio para confeccao do modelo foi de 15,82±2,45 minutos, com durabilidade de 20 dias ...