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- W2097014712 abstract "OBJETIVO Solucoes hipertonicas e hiperoncoticas podem reduzir as necessidades de fluidos e o edema tissular, melhorar a perfusao e reduzir a incidencia de paraplegia associada com pincamento aortico com reperfusao subsequente. Foram avaliados os potenciais beneficios de uma solucao de hipertonica de acetato de sodio mais dextrana sobre a reperfusao pos isquemica. Avaliamos o fluxo sanguineo e a capacidade antioxidante do plasma, a medula espinal e o musculo esqueletico acima e abaixo da oclusao aortica, bem como o figado, rim e pâncreas. METODO A aorta de porcos anestesiados (n = 5-6/grupo ) foi ocluida ao nivel de T9 durante 30 min; os animais receberam 4 ml/kg acetato de Sodio + dextrana (HAD) ou 8,4% de NaHCO3 ( Controle ). Os porcos foram sacrificados 1h mais tarde. RESULTADOS Ao reduzir-se o fluxo de sangue a zero na medula espinal e musculo distal, observou-se duplicacao do fluxo espinal e aumento de 6 vezes no musculo proximal. Durante a reperfusao, o fluxo de sangue em todas as regioes voltaram aos niveis basais, sem diferencas estatisticas entre HAD e Controles. A taxa de peroxidacao lipidica no plasma foi menor em HAD que nos controles. O musculo distal apresentou niveis de glutationa 41% mais baixa e atividades significativamente mais baixas dos enzimas antioxidantes glutationa-peroxidase e redutase, catalase, superoxido dismutase em comparacao com o musculo proximal. A medula espinal distal exibiu niveis 2,5 vezes mais elevados de malondialdeido e 50% maior de atividade catalase comparados com medula espinal proximal. Para qualquer tecido, diferencas significativas na capacidade antioxidante ou evidencia de peroxidacao lipidica favoreceram o grupo HAD em comparacao com os controles. CONCLUSAO HAD apresentou vantagens discretas sobre o bicarbonato em relacao ao fluxo de sangue e status antioxidante de medula espinal e muscular apos este periodo de oclusao aortica seguida de reperfusao." @default.
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- W2097014712 date "2014-01-01" @default.
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- W2097014712 title "Use of small volume hypertonic acetate dextran during aortic occlusion in pigs: assessment of blood flow and antioxidant status in tissues" @default.
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- W2097014712 doi "https://doi.org/10.5935/medicalexpress.2014.01.11" @default.
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