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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.
171

Inhibiting Survival of Salmonella During Desiccation Through the Use of Naturally Occurring Signals

Headrick, Joseph 01 May 2023 (has links) (PDF)
A rising problem in agriculture is the increase of antibiotic-resistant Salmonella cases associated with chicken eggs, which transmit infection to humans. To counter this, new approaches to combat Salmonella in chickens and desiccated on eggshells are vital in the prevention of human foodborne illness. Disrupting signaling pathways with naturally occurring compounds provides a potential novel avenue for prevention of Salmonella infections, as this would disrupt sensing of these environments and inhibit subsequent optimal gene expression. Starting with signals identified in previous studies, salicylic acid was found to inhibit Salmonella desiccation survival on both eggshells and plastic. To expand upon this, a desiccation inhibition screen of 285 signals resulted in 9 additional potential desiccation inhibitors, including deoxyribose and guanine. By using natural signals to disrupt bacterial communication pathways, novel therapeutics that serve as viable antibacterial alternatives could be developed to prevent Salmonella contamination at a major source.
172

Development of a Pediatric Model of Nafld in Neonatal Iberian Pigs

Hernandez, Gabriella Veronica, Smith, Victoria Alice, Coffin, Morgan, Columbus, Daniel, Burd, Matthew, Sprayberry, Kimberly, Edwards, Mark, Peterson, Daniel, Bennett, Darin, Fanter, Robert, Kitts, Christopher, La Frano, Michael, Rice, Margaret, Burrin, Douglas, Maj, Magdalena, Manjarin, Rodrigo 01 June 2019 (has links)
The prevalence of non-alcoholic fatty liver disease (NAFLD) in children has increased over the past decades, creating a need for animal models that recapitulate the features of the pediatric disease. Iberian pigs have a leptin-resistant phenotype characterized by hyperleptinemia, hyperphagia, and extreme adipogenesis. We hypothesized that neonatal Iberian pigs fed a high fat high-fructose (HFF) diet will develop a pattern of liver injury resembling pediatric NAFLD. In addition, we sought to determine if a mixture of probiotics would prevent the disease. Animals were fed 1 of 4 diets containing (g/kg body weight × d) 0 g fructose, 11 g fat and 199 kcal (CON-N; n=8), 22 g fructose, 16 g fat and 300 kcal (HFF2-N; n=8), CON + probiotic (CON-P; n=6), or HFF2 + probiotic (HFF2-P; n=6) every 6 h for 70 d. The probiotic mixture (6.2 × 104 cfu/mL) contained Pediococcus acidilactici, Pediococcus pentosaceus, Lactobacillus plantarum and Bacillus amyloliquefaciens. Body weight was recorded every 3 d. Serum markers of liver injury and dyslipidemia were measured on d 40 and 65 at 2 h post feeding. Fasting leptin, insulin, glucose and homeostatic model assessment (HOMA) values were assessed on d 70. Liver and skeletal muscle (longissimus dorsi) were collected on d 70 for histology, triacylglyceride (TAG) quantification, relative gene expression, and Western blot analysis. Metabolomic analysis was performed on liver tissue and plasma. Body weight was not significantly greater in HFF fed pigs compared to CON. Leptin, alanine and aspartate aminotransferases, alkaline phosphatase, lactate dehydrogenase and total bilirubin were increased (P ≤ 0.001), and high and low density lipoproteins decreased (P ≤ 0.05) in HFF2-N and HFF2-P. Livers in HFF2-P and HFF2-N had higher relative weight and TAG (P ≤ 0.001), micro and macrovesicular steatosis, ballooning degeneration, Mallory-denk bodies, inflammation and necrosis, increased gene expression of TNFα, TGFβ, IL1α and PPARγ (P ≤ 0.001), and decreased ChREBP (P ≤ 0.001). A probiotic affect was seen as pigs fed CON-P and HFF2-P had higher insulin and HOMA values were increased (P ≤ 0.05). Western blot analysis showed dysregulation of autophagy in liver of pigs fed CON-P and HFF2-P, and in skeletal muscle of pigs fed CON-N and HFF2-N. Metabolomic analysis demonstrated dysregulation of one-carbon metabolism, the tricarboxylic acid cycle (TCA), the urea cycle, and amino acid metabolism of pigs fed HFF2 diets compared to CON diets. In conclusion, Iberian pigs fed a HFF diet recapitulate many pediatric NAFLD-associated features, in the absence of obesity and independently of probiotic supplementation, suggesting a potentially suitable model for pediatric NAFLD research. Furthermore, probiotic supplementation did not ameliorate the onset of NAFLD when fed in conjunction with a HFF diet.
173

Próteses metálicas ou gastrojejunoanastomose no tratamento paliativo da obstrução gastroduodenal: revisão sistemática e metanálise / Stents or gastrojejunostomy in the palliation of gastric outlet obstruction: systematic review and meta-analysis

Minata, Mauricio Kazuyoshi 26 June 2018 (has links)
Introdução: obstrução gastroduodenal maligna é uma condição frequente em neoplasias gástricas e pancreáticas em estágio avançado. O tratamento paliativo visa a melhora dos sintomas e da qualidade de vida, sendo realizado pelas técnicas cirúrgicas ou endoscópicas. Embora a terapêutica cirúrgica seja consagrada, as complicações relacionadas ao procedimento e as condições clínicas desfavoráveis dos pacientes devem ser consideradas. Apesar dos avanços do tratamento endoscópico e da possibilidade de oferecer um tratamento menos invasivo, deve-se considerar as complicações e a taxa de reintervenção desta modalidade terapêutica. Novas tecnologias foram desenvolvidas para minimizar as complicações relacionadas ao uso de próteses e demandam uma análise pormenorizada. O objetivo desta revisão sistemática é comparar o tratamento endoscópico com próteses cobertas e não cobertas e o cirúrgico com gastrojejunoanastomose para obstrução gastroduodenal. Métodos: ensaios clínicos randomizados foram identificados nas bases de dados do MEDLINE, Embase, Cochrane, LILACS, SCOPUS e CINAHL. A comparação entre as próteses metálicas cobertas e não cobertas incluiu o sucesso técnico, sucesso clínico, complicações, obstrução, migração, sangramento, perfuração, fratura das próteses e reintervenção. Os desfechos usados na comparação da terapêutica cirúrgica com gastrojejunoanastomose e endoscópica com próteses foram o sucesso técnico, complicações e reintervenção. A avaliação da patência não pode ser incluída devido à falta de uniformidade dos dados extraídos. Resultados: oito artigos foram selecionados, três comparando gastrojejunostomia e próteses e cinco comparando próteses cobertas e não cobertas. A metanálise dos estudos sobre gastroenteroanastomose e próteses não demonstrou diferença significativa no sucesso técnico e número absoluto de complicações. O tratamento com próteses apresentou uma maior taxa de reintervenção que a terapêutica cirúrgica (DR = 0,26, IC 95% = 0,05 a 0,47, NNH = 4). A metanálise que comparou próteses metálicas cobertas e não cobertas não demonstrou diferença estatística significativa considerando o sucesso técnico, sucesso clínico, complicações, fratura das próteses, perfuração, sangramento e necessidade de reintervenção. Uma maior taxa de migração foi atribuída à terapêutica com próteses cobertas (DR = 0,09, IC 95% = 0,04 a 0,14, NNH = 11). Entretanto, o tratamento com próteses cobertas apresenta menor taxa de obstrução em relação às não cobertas (DR = -0,21, IC 95% = -0,27 a -0,15, NNT = 5). Uma análise de subgrupo de estudos com próteses metálicas que incluíram apenas pacientes com câncer gástrico demonstrou resultado semelhante à metanálise com todos os artigos. Conclusões: o tratamento endoscópico paliativo da obstrução gastroduodenal maligna com próteses cobertas apresenta maior taxa de migração e menor número de obstruções quando comparado com o uso de próteses não cobertas. A terapêutica cirúrgica com gastrojejunoanastomose associa-se a uma menor taxa de reintervenção em relação ao uso de próteses / Introduction: malignant gastric outlet obstruction is a frequent condition in advanced gastric and pancreatic neoplasms. Palliative treatment can be performed by endoscopic or surgical techniques. Palliation aims to relief symptoms and increase quality of life. Although surgical therapy is the established treatment, the complication rate of the procedure and the unfavorable clinical conditions must be considered. Despite the advances in the endoscopic treatment and the possibility to offer a minimally invasive therapy, complication rate and need of reintervention must be reminded. New technologies have been developed to minimize the complications related to the use of stents and require a detailed analysis. This systematic review aims to compare surgery and covered and uncovered stent treatments for gastric outlet obstruction. Methods: randomized clinical trials were identified in MEDLINE, Embase, Cochrane, LILACs, BVS, SCOPUS and CINAHL databases. Comparison of covered and uncovered stents included: technical success, clinical success, complications, obstruction, migration, bleeding, perforation, stent fracture and reintervention. The outcomes used to compare Gastrojejunostomy and stents were technical success, complications and reintervention. Patency rate could not be included because of lack of uniformity of the extracted data. Results: eight studies were selected, three comparing gastrojejunostomy and stents and five comparing covered and uncovered stents. The meta-analysis of surgical and endoscopic stent treatment showed no difference in the technical success and overall number of complications. Stents had higher reintervention rates than surgery (RD: 0.26, 95% CI [0.05, 0.47], NNH: 4). There is no significant difference in technical success, clinical success, complications, stent fractures, perforation, bleeding and the need for reintervention in the analyses of covered and uncovered stents. There is a higher migration rate in the covered stent therapy compared to uncovered self-expanding metallic stents in the palliation of malignant gastric outlet obstruction (RD: 0.09, 95% CI [0.04, 0.14], NNH: 11). Nevertheless, covered stents had lower obstruction rates (RD: -0.21, 95% CI [-0.27, - 0.15], NNT: 5). A subgroup analysis with studies that included only patients with gastric cancer showed similar results when compared with the analysis with all trials. Conclusions: in the palliation of malignant gastric outlet obstruction, covered stents had higher migration and lower obstruction rates when compared with uncovered stents. Gastrojejunostomy is associated with lower reintervention rates than stents
174

Abordagem endoscópica comparada à cirúrgica no tratamento do câncer gástrico precoce: revisão sistemática e metanálises / Endoscopic approach versus surgery in the treatment of early gastric cancer: a systematic review and meta-analyses

Kondo, André 18 November 2016 (has links)
Os desfechos clínicos e oncológicos dos pacientes submetidos à ressecção endoscópica do câncer gástrico precoce (CGP), considerando os critérios de indicação, comparados à cirurgia, não foram relatados em revisões sistemáticas. A pesquisa foi desenvolvida para estabelecer os desfechos de curto e longo prazos da ressecção endoscópica comparada à cirurgia no tratamento do CGP, elevando as informações para o nível de evidência 2a, melhor respaldando a prática clínica. A revisão sistemática com metanálises foi procedida utilizando-se as bases Medline, Embase, Cochrane, LILACS, Scopus e CINAHL. Onze coortes retrospectivas foram selecionadas para análise qualitativa e quantitativa. Todos os estudos incluem pacientes com CGP e comparam os desfechos nos dois braços. Os dados envolveram 2654 pacientes que preenchiam os critérios absolutos ou expandidos para ressecção endoscópica. Diferentes modalidades de tratamento endoscópico foram avaliadas, principalmente os procedimentos de ressecção, como endoscopic mucosal resection (EMR) e endoscopic submucosal dissection (ESD). As informações basearam-se nas características dos participantes, critérios de inclusão e exclusão, tipos de intervenções e desfechos (diferentes taxas de sobrevida, eventos adversos, ressecção completa, recorrência e mortalidade). As análises dos riscos absolutos dos desfechos foram feitas com o software RevMan, computando-se as diferenças de risco (DR) das variáveis dicotômicas. Dados de DR e intervalo de confiança de 95% (IC) foram calculados utilizando-se o teste de Mantel-Haenszel e a inconsistência foi qualificada e reportada em ?2 e método Higgins (I2). A análise de sensibilidade foi feita quando a heterogeneidade era maior que 50%. Todas as análises basearam-se inicialmente no modelo de efeito fixo. Dados de sobrevida de 3 anos estavam disponíveis em seis estudos (n = 1197). Não houve DR após os dois tratamentos (DR = 0,01, IC 95% = -0,02 a 0,05). A sobrevida de 5 anos (n = 2310) não demonstrou diferença significativa entre os grupos analisados (DR = 0,01, IC 95% = -0,01 a 0,03). A avaliação de 551 pacientes não evidenciou desigualdade na sobrevida de 10 anos entre as diferentes abordagens (DR = -0,02, IC 95% = -0,15 a 0,10). Dados de complicação estavam presentes em oito estudos (n = 2439), e diferença significativa foi detectada (DR = -0,08, IC 95% = -0,10 a -0,05), demonstrando melhores resultados com a endoscopia. As taxas de ressecção completa foram analisadas em 536 pacientes. Evidenciou-se diferença significativa entre o tratamento endoscópico e cirúrgico (DR = -0,13, IC 95% = -0,17 a -0,09), validando melhores resultados no último grupo. A recorrência foi avaliada em cinco pesquisas (n = 1331) e não houve diferença entre as duas formas de terapêutica (DR = 0,01, IC 95% = -0,00 a 0,02). As taxas de mortalidade foram obtidas de quatro estudos (n = 1107), e não se evidenciou diferença entre os grupos envolvidos (DR = -0,01, IC 95% = -0,02 a 0,00). Conclui-se que as taxas de sobrevida de 3, 5 e 10 anos, recorrência e mortalidade são semelhantes em ambos os grupos. Considerando-se as taxas de complicação, a abordagem endoscópica confere resultados mais apropriados e, analisando-se as taxas de ressecção completa, ela é inferior à cirurgia / Clinical and oncological outcomes of endoscopic resection of early gastric cancer (EGC), considering the indication criteria, compared to surgery, have not been reported in systematic reviews. To address the short- and long-term outcomes of endoscopic resection compared to surgery in the treatment of EGC, a systematic review was performed, establishing the available data to an unpublished 2a strength of evidence, better handling clinical practice. A systematic review and meta-analysis using Medline, Embase, Cochrane, LILACS, Scopus and CINAHL databases were done. Eleven retrospective cohort studies were selected to quantitative and qualitative synthesis. All studies included patients diagnosed with EGC that compared outcomes considering endoscopic treatment and surgery. The included records involved 2654 patients with EGC that filled the standard or expanded indications for endoscopic resection. Different endoscopic treatment modalities were analyzed, mainly mucosal resection procedures such as endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD), compared to surgery. Information of the selected studies was extracted on characteristics of trial participants, inclusion and exclusion criteria, types of interventions and outcomes (different survival rates, adverse events, complete resection, recurrence and mortality rates). The analysis of the absolute risks of the outcomes was performed using the software RevMan, by computing risk differences (RD) of dichotomous variables. Data on RD and 95% confidence interval (CI) for each outcome were calculated using the Mantel-Haenszel test and inconsistency was qualified and reported in X2 and the Higgins method (I2). Sensitivity analysis was performed when heterogeneity was higher than 50%. All pooled analyses were initially based on fixed-effects model. Three-year survival data were available for six studies (n = 1197). There were no RD in 3-year survival data after endoscopic and surgical treatment of EGC (RD = 0.01, 95% CI = -0.02 to 0.05). Five-year survival data (n = 2310) showed no evidence of a difference between the two groups (RD = 0.01, 95% CI = -0.01 to 0.03). The data analysis, in 551 patients, showed no difference in 10-year survival rates between the approaches (RD = -0.02 and 95% CI = -0.15 to 0.10). Complication data were identified in eight studies (n = 2439). A significant difference was detected (RD = -0.08, 95% CI = -0.10 to -0.05), demonstrating better results with endoscopic approach. Complete resection data was analyzed in 536 patients. It showed significant difference in complete resection rates between endoscopic and surgical treatment of EGC (RD = -0.13, 95% CI = -0.17 to -0.09), exhibiting improved results in the surgical group. Recurrence data were analyzed in five studies (n = 1331) and there was no difference between the approaches (RD = 0.01, 95% CI = -0.00 to 0.02). Mortality data were obtained in four studies (n = 1107), and there was no difference between treatment modalities (RD = -0.01, 95% CI = -0.02 to 0.00). This systematic review concludes that 3-, 5- and 10-year survival, recurrence and mortality rates are similar for both groups. Considering procedure-related complication rates, endoscopic approach achieves significantly better results and, analyzing complete resection data, it is considered worse than surgery
175

Estudo crítico da hernioplastia pela técnica de Bassini modificada quanto aos resultados mediatos / Critical study of hernioplasty thru the modified Bassinitechnique as to the mediate results

Neder, Joel 03 October 2003 (has links)
No presente estudo, 30 pacientes, do sexo masculino com idade mediana de 29 anos, portadores de hérnias inguinais / inguino-escrotais, unilaterais, indiretas e primárias, sem encarceramento ou estrangulamento, foram submetidos à hernioplastia inguinal, por meio de inguinotomia, sob raqui-anestesia em regime de internação hospitalar. A técnica de correção utilizada foi a de Bassini modificada, sendo que estas modificações repousam no tipo da incisão, abordagem da fáscia transversalis e no reforço da parede posterior do canal inguinal. Os objetivos foram os de avaliar os resultados do pós-operatório mediato quanto aos eventos: intensidade e duração da dor pós-operatória e o tempo de retorno às atividades normais, estabelecendo assim a duração maior ou menor do período de convalescença. Das hérnias operadas 33,33% e 66,67% foram classificadas no intra-operatório como tipos I e II de Nyhus, respectivamente. A duração da cirurgia variou entre 45 e 85 minutos, com média de 66,46 minutos e mediana de 66,5 minutos. A permanência hospitalar foi menor que 24 horas. O índice de mortalidade foi nulo e o seguimento foi feito no 10º e 30° dias de pós-operatório. A intensidade média da dor pós-operatória atingiu seu pico máximo no 1º dia, alcançando 2,93 na escala analógica decimal, sendo que a partir do 5° dia de pós-operatório se tornou insignificante. O retorno às atividades habituais e sociais se deu em um período médio de 5,34 dias. O tempo de retorno ao trabalho alcançou a média de 11,23 dias e mediana de 5 dias. Observou-se complicação leve em dois pacientes (6,67%), que apresentaram edema de bolsa escrotal de rápida resolução. Não se observou complicações infecciosas apesar do não uso de antimicrobianos. A análise dos dados obtidos permite concluir que o procedimento é exeqüível, com boa aceitação por parte dos pacientes, apresentando resultados comparáveis aos obtidos na literatura / In the present study, 30 patients, of the male sex, with an average age of 29, victims of inguinal hernias/ inguino-scrotum, unilateral, indirect and primaries, without confinement or strangulation, were submitted to inguinal hernioplasty, thru inguinotomy, under rachianesthesia on a regimen as hospital in--patients. The correction technique used was the modified- Bassini, since these modifications lie in the kind of incision, approaching of the fascia transversalis and in the reinforcement of the posterior wall of the inguinal duct. The purposes were of evaluating the mediate post-operative results as to the events: intensity and duration of the post-operative pain in the period of time of return to the normal activities, thus determining the longer or shorter duration of the recovery period. Among the operated hernias 33.33% and 66.67% they were classified in the intra-operative as types I and II of Nyhus, respectively. The duration of the surgery varied between 45 and 85 minutes, with an average of 66.46 minutes and median of 66.5 minutes. The in-patients stay in the hospital was less than 24 hours. The mortality rate was null and the follow up was made on the 10th and 30th days of the post operative. The average intensity of the post-operative pain reached its appex on the 1st day, reaching 2.93 in the decimal analogical scale, and as of the 5th day of the post-operative it became insignificant. The return both to the usual and social activities happened in an average period of time of 5.34 days. The period of time of returning to work reached an average of 11.23 days and a median of 5 days. A slight complication was observed in two patients (6.67%), who had edema in the scrotum pouch of fast solution. No infectious complications were detected in spite of not using any anti-microbians. The analysis of the data obtained allow to conclude that the procedure is feasible, with good approval on the part of the patients, presenting results comparable to the ones obtained in the literature
176

Próteses metálicas ou gastrojejunoanastomose no tratamento paliativo da obstrução gastroduodenal: revisão sistemática e metanálise / Stents or gastrojejunostomy in the palliation of gastric outlet obstruction: systematic review and meta-analysis

Mauricio Kazuyoshi Minata 26 June 2018 (has links)
Introdução: obstrução gastroduodenal maligna é uma condição frequente em neoplasias gástricas e pancreáticas em estágio avançado. O tratamento paliativo visa a melhora dos sintomas e da qualidade de vida, sendo realizado pelas técnicas cirúrgicas ou endoscópicas. Embora a terapêutica cirúrgica seja consagrada, as complicações relacionadas ao procedimento e as condições clínicas desfavoráveis dos pacientes devem ser consideradas. Apesar dos avanços do tratamento endoscópico e da possibilidade de oferecer um tratamento menos invasivo, deve-se considerar as complicações e a taxa de reintervenção desta modalidade terapêutica. Novas tecnologias foram desenvolvidas para minimizar as complicações relacionadas ao uso de próteses e demandam uma análise pormenorizada. O objetivo desta revisão sistemática é comparar o tratamento endoscópico com próteses cobertas e não cobertas e o cirúrgico com gastrojejunoanastomose para obstrução gastroduodenal. Métodos: ensaios clínicos randomizados foram identificados nas bases de dados do MEDLINE, Embase, Cochrane, LILACS, SCOPUS e CINAHL. A comparação entre as próteses metálicas cobertas e não cobertas incluiu o sucesso técnico, sucesso clínico, complicações, obstrução, migração, sangramento, perfuração, fratura das próteses e reintervenção. Os desfechos usados na comparação da terapêutica cirúrgica com gastrojejunoanastomose e endoscópica com próteses foram o sucesso técnico, complicações e reintervenção. A avaliação da patência não pode ser incluída devido à falta de uniformidade dos dados extraídos. Resultados: oito artigos foram selecionados, três comparando gastrojejunostomia e próteses e cinco comparando próteses cobertas e não cobertas. A metanálise dos estudos sobre gastroenteroanastomose e próteses não demonstrou diferença significativa no sucesso técnico e número absoluto de complicações. O tratamento com próteses apresentou uma maior taxa de reintervenção que a terapêutica cirúrgica (DR = 0,26, IC 95% = 0,05 a 0,47, NNH = 4). A metanálise que comparou próteses metálicas cobertas e não cobertas não demonstrou diferença estatística significativa considerando o sucesso técnico, sucesso clínico, complicações, fratura das próteses, perfuração, sangramento e necessidade de reintervenção. Uma maior taxa de migração foi atribuída à terapêutica com próteses cobertas (DR = 0,09, IC 95% = 0,04 a 0,14, NNH = 11). Entretanto, o tratamento com próteses cobertas apresenta menor taxa de obstrução em relação às não cobertas (DR = -0,21, IC 95% = -0,27 a -0,15, NNT = 5). Uma análise de subgrupo de estudos com próteses metálicas que incluíram apenas pacientes com câncer gástrico demonstrou resultado semelhante à metanálise com todos os artigos. Conclusões: o tratamento endoscópico paliativo da obstrução gastroduodenal maligna com próteses cobertas apresenta maior taxa de migração e menor número de obstruções quando comparado com o uso de próteses não cobertas. A terapêutica cirúrgica com gastrojejunoanastomose associa-se a uma menor taxa de reintervenção em relação ao uso de próteses / Introduction: malignant gastric outlet obstruction is a frequent condition in advanced gastric and pancreatic neoplasms. Palliative treatment can be performed by endoscopic or surgical techniques. Palliation aims to relief symptoms and increase quality of life. Although surgical therapy is the established treatment, the complication rate of the procedure and the unfavorable clinical conditions must be considered. Despite the advances in the endoscopic treatment and the possibility to offer a minimally invasive therapy, complication rate and need of reintervention must be reminded. New technologies have been developed to minimize the complications related to the use of stents and require a detailed analysis. This systematic review aims to compare surgery and covered and uncovered stent treatments for gastric outlet obstruction. Methods: randomized clinical trials were identified in MEDLINE, Embase, Cochrane, LILACs, BVS, SCOPUS and CINAHL databases. Comparison of covered and uncovered stents included: technical success, clinical success, complications, obstruction, migration, bleeding, perforation, stent fracture and reintervention. The outcomes used to compare Gastrojejunostomy and stents were technical success, complications and reintervention. Patency rate could not be included because of lack of uniformity of the extracted data. Results: eight studies were selected, three comparing gastrojejunostomy and stents and five comparing covered and uncovered stents. The meta-analysis of surgical and endoscopic stent treatment showed no difference in the technical success and overall number of complications. Stents had higher reintervention rates than surgery (RD: 0.26, 95% CI [0.05, 0.47], NNH: 4). There is no significant difference in technical success, clinical success, complications, stent fractures, perforation, bleeding and the need for reintervention in the analyses of covered and uncovered stents. There is a higher migration rate in the covered stent therapy compared to uncovered self-expanding metallic stents in the palliation of malignant gastric outlet obstruction (RD: 0.09, 95% CI [0.04, 0.14], NNH: 11). Nevertheless, covered stents had lower obstruction rates (RD: -0.21, 95% CI [-0.27, - 0.15], NNT: 5). A subgroup analysis with studies that included only patients with gastric cancer showed similar results when compared with the analysis with all trials. Conclusions: in the palliation of malignant gastric outlet obstruction, covered stents had higher migration and lower obstruction rates when compared with uncovered stents. Gastrojejunostomy is associated with lower reintervention rates than stents
177

Abordagem endoscópica comparada à cirúrgica no tratamento do câncer gástrico precoce: revisão sistemática e metanálises / Endoscopic approach versus surgery in the treatment of early gastric cancer: a systematic review and meta-analyses

André Kondo 18 November 2016 (has links)
Os desfechos clínicos e oncológicos dos pacientes submetidos à ressecção endoscópica do câncer gástrico precoce (CGP), considerando os critérios de indicação, comparados à cirurgia, não foram relatados em revisões sistemáticas. A pesquisa foi desenvolvida para estabelecer os desfechos de curto e longo prazos da ressecção endoscópica comparada à cirurgia no tratamento do CGP, elevando as informações para o nível de evidência 2a, melhor respaldando a prática clínica. A revisão sistemática com metanálises foi procedida utilizando-se as bases Medline, Embase, Cochrane, LILACS, Scopus e CINAHL. Onze coortes retrospectivas foram selecionadas para análise qualitativa e quantitativa. Todos os estudos incluem pacientes com CGP e comparam os desfechos nos dois braços. Os dados envolveram 2654 pacientes que preenchiam os critérios absolutos ou expandidos para ressecção endoscópica. Diferentes modalidades de tratamento endoscópico foram avaliadas, principalmente os procedimentos de ressecção, como endoscopic mucosal resection (EMR) e endoscopic submucosal dissection (ESD). As informações basearam-se nas características dos participantes, critérios de inclusão e exclusão, tipos de intervenções e desfechos (diferentes taxas de sobrevida, eventos adversos, ressecção completa, recorrência e mortalidade). As análises dos riscos absolutos dos desfechos foram feitas com o software RevMan, computando-se as diferenças de risco (DR) das variáveis dicotômicas. Dados de DR e intervalo de confiança de 95% (IC) foram calculados utilizando-se o teste de Mantel-Haenszel e a inconsistência foi qualificada e reportada em ?2 e método Higgins (I2). A análise de sensibilidade foi feita quando a heterogeneidade era maior que 50%. Todas as análises basearam-se inicialmente no modelo de efeito fixo. Dados de sobrevida de 3 anos estavam disponíveis em seis estudos (n = 1197). Não houve DR após os dois tratamentos (DR = 0,01, IC 95% = -0,02 a 0,05). A sobrevida de 5 anos (n = 2310) não demonstrou diferença significativa entre os grupos analisados (DR = 0,01, IC 95% = -0,01 a 0,03). A avaliação de 551 pacientes não evidenciou desigualdade na sobrevida de 10 anos entre as diferentes abordagens (DR = -0,02, IC 95% = -0,15 a 0,10). Dados de complicação estavam presentes em oito estudos (n = 2439), e diferença significativa foi detectada (DR = -0,08, IC 95% = -0,10 a -0,05), demonstrando melhores resultados com a endoscopia. As taxas de ressecção completa foram analisadas em 536 pacientes. Evidenciou-se diferença significativa entre o tratamento endoscópico e cirúrgico (DR = -0,13, IC 95% = -0,17 a -0,09), validando melhores resultados no último grupo. A recorrência foi avaliada em cinco pesquisas (n = 1331) e não houve diferença entre as duas formas de terapêutica (DR = 0,01, IC 95% = -0,00 a 0,02). As taxas de mortalidade foram obtidas de quatro estudos (n = 1107), e não se evidenciou diferença entre os grupos envolvidos (DR = -0,01, IC 95% = -0,02 a 0,00). Conclui-se que as taxas de sobrevida de 3, 5 e 10 anos, recorrência e mortalidade são semelhantes em ambos os grupos. Considerando-se as taxas de complicação, a abordagem endoscópica confere resultados mais apropriados e, analisando-se as taxas de ressecção completa, ela é inferior à cirurgia / Clinical and oncological outcomes of endoscopic resection of early gastric cancer (EGC), considering the indication criteria, compared to surgery, have not been reported in systematic reviews. To address the short- and long-term outcomes of endoscopic resection compared to surgery in the treatment of EGC, a systematic review was performed, establishing the available data to an unpublished 2a strength of evidence, better handling clinical practice. A systematic review and meta-analysis using Medline, Embase, Cochrane, LILACS, Scopus and CINAHL databases were done. Eleven retrospective cohort studies were selected to quantitative and qualitative synthesis. All studies included patients diagnosed with EGC that compared outcomes considering endoscopic treatment and surgery. The included records involved 2654 patients with EGC that filled the standard or expanded indications for endoscopic resection. Different endoscopic treatment modalities were analyzed, mainly mucosal resection procedures such as endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD), compared to surgery. Information of the selected studies was extracted on characteristics of trial participants, inclusion and exclusion criteria, types of interventions and outcomes (different survival rates, adverse events, complete resection, recurrence and mortality rates). The analysis of the absolute risks of the outcomes was performed using the software RevMan, by computing risk differences (RD) of dichotomous variables. Data on RD and 95% confidence interval (CI) for each outcome were calculated using the Mantel-Haenszel test and inconsistency was qualified and reported in X2 and the Higgins method (I2). Sensitivity analysis was performed when heterogeneity was higher than 50%. All pooled analyses were initially based on fixed-effects model. Three-year survival data were available for six studies (n = 1197). There were no RD in 3-year survival data after endoscopic and surgical treatment of EGC (RD = 0.01, 95% CI = -0.02 to 0.05). Five-year survival data (n = 2310) showed no evidence of a difference between the two groups (RD = 0.01, 95% CI = -0.01 to 0.03). The data analysis, in 551 patients, showed no difference in 10-year survival rates between the approaches (RD = -0.02 and 95% CI = -0.15 to 0.10). Complication data were identified in eight studies (n = 2439). A significant difference was detected (RD = -0.08, 95% CI = -0.10 to -0.05), demonstrating better results with endoscopic approach. Complete resection data was analyzed in 536 patients. It showed significant difference in complete resection rates between endoscopic and surgical treatment of EGC (RD = -0.13, 95% CI = -0.17 to -0.09), exhibiting improved results in the surgical group. Recurrence data were analyzed in five studies (n = 1331) and there was no difference between the approaches (RD = 0.01, 95% CI = -0.00 to 0.02). Mortality data were obtained in four studies (n = 1107), and there was no difference between treatment modalities (RD = -0.01, 95% CI = -0.02 to 0.00). This systematic review concludes that 3-, 5- and 10-year survival, recurrence and mortality rates are similar for both groups. Considering procedure-related complication rates, endoscopic approach achieves significantly better results and, analyzing complete resection data, it is considered worse than surgery
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Estudo crítico da hernioplastia pela técnica de Bassini modificada quanto aos resultados mediatos / Critical study of hernioplasty thru the modified Bassinitechnique as to the mediate results

Joel Neder 03 October 2003 (has links)
No presente estudo, 30 pacientes, do sexo masculino com idade mediana de 29 anos, portadores de hérnias inguinais / inguino-escrotais, unilaterais, indiretas e primárias, sem encarceramento ou estrangulamento, foram submetidos à hernioplastia inguinal, por meio de inguinotomia, sob raqui-anestesia em regime de internação hospitalar. A técnica de correção utilizada foi a de Bassini modificada, sendo que estas modificações repousam no tipo da incisão, abordagem da fáscia transversalis e no reforço da parede posterior do canal inguinal. Os objetivos foram os de avaliar os resultados do pós-operatório mediato quanto aos eventos: intensidade e duração da dor pós-operatória e o tempo de retorno às atividades normais, estabelecendo assim a duração maior ou menor do período de convalescença. Das hérnias operadas 33,33% e 66,67% foram classificadas no intra-operatório como tipos I e II de Nyhus, respectivamente. A duração da cirurgia variou entre 45 e 85 minutos, com média de 66,46 minutos e mediana de 66,5 minutos. A permanência hospitalar foi menor que 24 horas. O índice de mortalidade foi nulo e o seguimento foi feito no 10º e 30° dias de pós-operatório. A intensidade média da dor pós-operatória atingiu seu pico máximo no 1º dia, alcançando 2,93 na escala analógica decimal, sendo que a partir do 5° dia de pós-operatório se tornou insignificante. O retorno às atividades habituais e sociais se deu em um período médio de 5,34 dias. O tempo de retorno ao trabalho alcançou a média de 11,23 dias e mediana de 5 dias. Observou-se complicação leve em dois pacientes (6,67%), que apresentaram edema de bolsa escrotal de rápida resolução. Não se observou complicações infecciosas apesar do não uso de antimicrobianos. A análise dos dados obtidos permite concluir que o procedimento é exeqüível, com boa aceitação por parte dos pacientes, apresentando resultados comparáveis aos obtidos na literatura / In the present study, 30 patients, of the male sex, with an average age of 29, victims of inguinal hernias/ inguino-scrotum, unilateral, indirect and primaries, without confinement or strangulation, were submitted to inguinal hernioplasty, thru inguinotomy, under rachianesthesia on a regimen as hospital in--patients. The correction technique used was the modified- Bassini, since these modifications lie in the kind of incision, approaching of the fascia transversalis and in the reinforcement of the posterior wall of the inguinal duct. The purposes were of evaluating the mediate post-operative results as to the events: intensity and duration of the post-operative pain in the period of time of return to the normal activities, thus determining the longer or shorter duration of the recovery period. Among the operated hernias 33.33% and 66.67% they were classified in the intra-operative as types I and II of Nyhus, respectively. The duration of the surgery varied between 45 and 85 minutes, with an average of 66.46 minutes and median of 66.5 minutes. The in-patients stay in the hospital was less than 24 hours. The mortality rate was null and the follow up was made on the 10th and 30th days of the post operative. The average intensity of the post-operative pain reached its appex on the 1st day, reaching 2.93 in the decimal analogical scale, and as of the 5th day of the post-operative it became insignificant. The return both to the usual and social activities happened in an average period of time of 5.34 days. The period of time of returning to work reached an average of 11.23 days and a median of 5 days. A slight complication was observed in two patients (6.67%), who had edema in the scrotum pouch of fast solution. No infectious complications were detected in spite of not using any anti-microbians. The analysis of the data obtained allow to conclude that the procedure is feasible, with good approval on the part of the patients, presenting results comparable to the ones obtained in the literature
179

Gut Microbiota Regulation of P-Glycoprotein in the Mammalian Intestinal Epithelium to Suppress Aberrant Inflammation and Maintain Homeostasis

Foley, Sage E. 22 March 2022 (has links)
P-glycoprotein (P-gp) protects the mammalian intestinal epithelium by effluxing toxins from the epithelial cells as well as release of human endocannabinoids that inhibit neutrophil infiltration. Diminished or dysfunctional P-gp is associated with intestinal inflammation including ulcerative colitis (UC). Due to the microbiome dysbiosis associated with UC, we hypothesize that the healthy microbiota promote colonic P-gp expression. Utilizing mouse models of antibiotic treatment, microbiota reconstitution, and metabolite perturbation, we have shown butyrate and secondary bile acids, dependent on vancomycin-sensitive bacteria, induce P-gp expression in vivo. We have shown these metabolites together potentiate induction of P-gp in intestinal epithelial cell lines in vitro, which is sufficient to inhibit primary human neutrophil transmigration. Furthermore, in UC patients we find diminished P-gp expression is coupled to reduction of anti-inflammatory endocannabinoids and luminal content with reduced capability to induce P-gp expression. Additionally, we have found butyrate contributes to P-gp expression via histone deacetylase inhibition, and secondary bile acids regulate P-gp expression via nuclear receptors pregnane X receptor and vitamin D receptor. Employing RNA sequencing (RNAseq) in IECs uncovered signaling networks that are uniquely triggered with the combination of butyrate and secondary bile acids, suggesting additional pathways required for maximal P-gp expression in the colon. Together we identify a mechanistic link between cooperative functional outputs of the complex microbial community and suppression of intestinal inflammation. These data emphasize the importance of the intestinal microbiome in driving the P-gp axis to suppress aberrant neutrophil infiltration and identify potential therapeutic targets for promoting P-gp expression in an inflamed colon to reset homeostasis.
180

Ultrazvučna dijagnostika upalnih oboljenja creva u komparaciji sa magnetnom rezonancom u dečjem i adolescentnom dobu / Ultrasound diagnosis of inflammatory bowel disease in comparison with magnetic resonance imaging in children and adolescence

Jecković Mihajlo 28 September 2016 (has links)
<p>UVOD: Hronične inflamatorne bolesti se ispoljavaju kao Kronova bolest i ulcerozni kolitis. Njihova značajnost ogleda se u hronicitetu kao i u stepenu u kom ograničavaju rast i razvoj dece i omladine. Brojne su posledice ovih oboljenja: dugotrajno izostajanje sa nastave, ograničavanje životnih aktivnosti i pojava komplikacija koje neretko zahvataju i druge organske sisteme. Etiologija je i dalje nerazja&scaron;njenja navodeći kao značajan hronični inflamatorni proces u genetski uslovljenih pojedinaca a provociranih nekim infektivnim agensom. Početkom 21. veka genetska istraživanja su otkrila osnovu nasleđivanja hroničnih inflamatornih oboljenja povezanih sa NOD2 genom. Kako je u pitanju organskim sistem koji je ograničeno pristupačan kliničkom pregledu, osnovu dijagnostike čine radiolo&scaron;ke metode. Kako je potrebno sprečiti kontinuirano izlaganje &scaron;tetnom dejstvu rendgenskog zračenja istraživanja se usmeravaju ka UZ i magnetnoj rezonanca. Na&scaron;e istraživanje se baziralo na mogućnostima ovih dveju metoda u svakodnevnom radu za dijagnostiku i dalje praćenje hroničnih inflamatornih bolesti creva. CILJEVI: Utvrditi senzitivnost i specifičnost ultrazvučne dijagnostike i magnetne resonance kod upalnih oboljenja creva u dečjem i adolescentnom uzrastu. Definisati i uporediti prednosti i ograničenja ultrazvučne dijagnostike sa dijagnostikom magnetne rezonace kod upalnih obolenja creva u dečjem i adolescentnom uzrastu. MATERIJAL I METODE: U istraživanje je uključeno 62. dece i adolescenata u toku prvog ataka bolesti ili ponovljenim fazama bolesti ili tokom redovnog praćenja u remisiji. Obuhvaćeni uzrast je od 4. do 18. godina. Potom su razvrstani u grupe na osnovu vrste pregleda i prisustva zadebljanja crevnog zida na A i B (pregled UZ), gde je A grupa imala zabeleženo zadebljanje crevnog zida preko 3 mm, a kod dece u grupi B debljina crevnog zida je bila između 2,5-3 mm. Sa druge strane na osnovu pregleda magnetnom rezonancom podeljeni su u A1 i B1 grupe, takođe po kriterijumu zadebljanja crevnog zida većeg od 3 mm (A1), odnosno između 2,5-3 mm (B1). Istraživanje je sprovedeno na Institutu za zdravstvenu za&scaron;titutu dece i omladine Vojvodine i Institutu za radiologiju Kliničkog centra Vojvodine. Prvi pregled načinjen je UZ a potom je načinjen pregled magnetnom rezonanacom. Podaci su obrađivani retrospektivno i prospektivno. Kriterijumi za uključivanje u studiju pored uzrasta bili su radiolo&scaron;ki: zadebljanje crevnog zida &gt;3mm, postojanje naru&scaron;ene arhitektonike crevnog zida, zadebljanje pojedinih crevnih segmenata-dužina segmenta, znaci fibroze, odsustvo peristaltike, izražena hiperemija na kolor Doppleru, transmuralni znaci upale, uvećani mezenterijalni limfni nodusi kao i kontrolni pregledi kod dece sa ranije ustanovljenom dijagnozom. Načinjena je endoskopija sa biopsijom radi postavljanja definitivne dijagnoze, potom se pristupilo statističkoj obradi dobijenih podataka. Izračunate su prosečne i standardne devijacije i frekvencije kao i pripadajući procenti. Određivane su maksimalne i minimalne vrednosti, medijane i interkvartalni raspon. Dobijeni podaci prikazani su u grafikonima i tabelama. Za parametrijske varijable upotrebljavan je Man &ndash; Vitni U test. Za kategoričke vrednosti upotrebljeni su &chi;2 i Fi&scaron;erov test. Nadalje su određivane senzitivnost, specifičnost kao i pozitivne i negativne prediktivne vrednosti. Veze između dva parametra uspostavljene su pomoću Pirsonove korelacione analize i linearnim regresionim modelom. Upotrebljen je program za obradu podataka SPSS 21 Statistics,a kao statistički značajne vrednosti uzete su vrednosti p&lt;0,05. REZULTATI: Nakon statističke obrade nije zabeležena signifikantnost u pogledu zastupljenosti hroničnih inflamatornih bolesti među polovima. Statistička značajnost pronađena je u pogledu uzrasta dece u akutnoj fazi kao i remisiji bolesti. Statistička značajnost je dobijena za posmatranu debljinu crevnog zida, hiperemiju creva, prisustvo fibroze u digestivnom traktu. Primećeno je da UZ bolje razgraničava decu sa akutnim oboljenjem po pitanju zahvaćenosti segmenata. Ostala posmatrana obeležja nisu nakon statističke obrade imala statistički značaju razliku kada se procenjuju ultrazvučno ili magnetnom rezonancom. ZAKLJUČAK: Inicijalne hipoteze ovog istraživanja su nakon obrade podataka i potvrđene. Određivanjem senzitivnosti i specifičnosti UZ i MR dobijene su sledeće vrednosti: senzitivnost UZ je 88,4% naspram 92,3% koliko ima pregled magnetnom rezonancom. U pogledu specifičnosti UZ ima 88% a magnetna rezonanca 91,6%. Verifikovano je da magnetna rezonanca bolje razvrstava decu u akutnoj fazi bolesti kao i decu u remisiji. Rezultati pozitivnih i negativnih verovatnoća odnosa ne predviđaju neuspeh nijednim od ova dva pregleda.</p> / <p>INTRODUCTION: Chronic inflammatory diseases are manifested through two clinical entities: Crohn&#39;s disease and ulcerative colitis. Their significance lies in the chronicity and the degree to which they restrict the growth and development of children and youth. There are many consenquences that come with the very nature of the disease, in addition to long-term absence from school, limiting life activities and the occurrence of complications that often affect other organ systems. The etiology of the disease has long been in favor of the theory that a chronic inflammatory process in genetically conditioned individual is provoking an inflammation due to a certain infectious agent. However, a step closer was made regarding the etiology of the disease - when the genetic basis of inheritance studies have revealed chronic inflammatory bowel diseases were associated with NOD2 gene. It is particularly important to prevent continuous exposure to the harmful effects of X-rays. Therefore, numerous studies have been made towards the validation of complementarity, accuracy and diagnostic capabilities of ultrasound and magnetic resonance imaging as noninvasive techniques. Our research was based on the capabilities of these two methods in their daily work for diagnosis and follow-up of chronic inflammatory bowel disease. OBJECTIVES: The objectives were to determine the sensitivity and specificity of ultrasound and magnetic resonance imaging in inflammatory bowel disease in children and adolescents. Furthermore, the aim was to define and compare the advantages and limitations between ultrasound diagnosis and magnetic resonance in inflammatory bowel disease in children and adolescents. MATERIAL AND METHODS: The study included 62 children and adolescents during the first attack of disease or recurrent stages of the disease, or during regular monitoring in remission. Patients included children of both sexes, aged 4-18. Then they were sorted into groups based on the type of the examination and the presence of a thickening of the intestinal wall into groups A and B - in these groups children were examined by ultrasound, A group had observed thickening of the intestinal wall &gt; 3 mm whereas children in group B had had thickening of the intestinal wall between 2,5-3 mm. Based on the review of MRI children were divided into groups A1 and B1, also according to the criterion of bowel wall thickening greater than 3mm (A1) and between 2,5-3mm (B1). The research was conducted at the Institute for Health Protection of Children and Youth and the Institute of Radiology, Clinical Center of Vojvodina. The first review was made by ultrasound, followed by the review of magnetic resonance. Data were analyzed retrospectively and prospectively. Criteria for inclusion in the study were: thickening of the intestinal wall greater than 3 mm, the existence of disturbed intestinal wall architectural structure, no clear distinction of layers, abnormal thickening of certain intestinal segments, signs of fibrosis, the absence of peristalsis, expressed hyperemia on color Doppler, transmural inflammation, increased mesenterial lymph nodes as well as check-ups for children with previously established diagnosis. Endosccopy with biopsy has made for the definitive diagnosis and then we approached statistical analysis of the data obtained. The data are presented in graphs and tables. For parametric variables we used Man - Whitney U test. For categorical values &chi;2 and Fisher&#39;s test were used. Further the sensitivity, specificity and positive and negative predictive values were determined. Relationship between these two parameters were established using Pearson correlation analysis and linear regression model. For data processing we used the program SPSS Statistics 21, statistically significant values were taken p values &lt;0.05. RESULTS: After statistical analysis there was no for the number of chronic inflammatory diseases between the sexes. Statistical significance was found in terms of age of the children during the acute phase as well as remission. Statistical significance was obtained for the observed thickness of the intestinal wall, intestinal hyperemia, the presence of fibrosis in the digestive tract. It was noted that US better demarcates children with acute disease in terms of involvement of segments. Other features are not observed as significant after the statistical analysis. CONCLUSION: The initial hypothesis of this study, after data processing were confirmed. By determining the sensitivity and specificity of ultrasound MRI results we came to the following results: sensitivity of ultrasound was 88,4% versus 92,3%, for magnetic resonance. In terms of specifics UZ has a 88% and 91,6% of magnetic resonance imaging. The classification of children in the acute phase of the disease as well as children in remission was better when MRI was used. The results of positive and negative predictions do not predict the probability of failure in neither of these methods.</p>

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