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portuguesObjetivou-se avaliar os efeitos de tres solucoes eletroliticas enterais de manutencao com diferentes fontes de energia administradas em bovinos adultos por via nasorruminal em fluxo continuo sobre parâmetros fisiologicos e hematologicos. Foram utilizadas seis novilhas holandesas em um delineamento crossover. Os animais foram submetidos a tres tratamentos: Solucao contendo Propionato de calcio - 4g de NaCl, 0,5g de KCl, 0,3g de MgCl2 e 10g de propionato de calcio para cada 1000mL (Osmolaridade mensurada: 299mOsm/L); Solucao contendo Glicerol - 4g de NaCl, 0,5g de KCl, 0,3g de MgCl2, 1g de acetato de calcio e 10mL de glicerol para cada 1000mL (Osmolaridade mensurada: 287mOsm/L); Solucao contendo Propilenoglicol - 4g de NaCl, 0,5g de KCl, 0,3g de MgCl2, 1g de acetato de calcio e 15mL de propilenoglicol para cada 1.000mL (Osmolaridade mensurada: 378mOsm/L). Foi realizado exame fisico e colheita de sangue para os hemogramas imediatamente antes do inicio da hidratacao e a cada tres horas durante 12h de tratamento e mais uma colheita 12h apos o final do periodo experimental, perfazendo seis colheitas ao total. Todas solucoes promoveram ao longo das 12 horas de tratamento hemodiluicao com reducao nos valores de hemacias, concentracao de hemoglobina e volume globular, sem, contudo, alterar o leucograma. A hidratacao enteral em fluxo continuo via nasorruminal, mostrou-se uma tecnica bem tolerada pelos animais, como minimos efeitos sobre o bem-estar, mesmo quando administrada por 12 horas, sendo, portanto, uma tecnica indicada como uma opcao a hidratacao parenteral na terapia de manutencao de fluidos. As tres solucoes eletroliticas aqui propostas sao capazes de expandir significativamente a volemia. Palavras-chave: ruminantes; solucoes polionicas; parâmetros fisiologicos; volemia; hemograma EnglishThe aim of this study was to evaluate the effects of three enteral electrolyte solutions, each with different energy sources, administrated as continuous flow on the physiological parameters and blood count of healthy Holstein heifers. Six Holstein heifers were used in a crossover design. All animals received all three treatments: solution with calcium propionate, 4g of NaCl, 0.5g of KCl, 0.3g of MgCl2, and 10g of calcium propionate diluted in 1000mL of water (measured osmolarity: 299mOsm/L); solution with glycerol, 4g of NaCl, 0.5g of KCl, 0.3g of MgCl2, 1g of calcium acetate, and 10mL of glycerol in 1000mL of water (measured osmolarity: 287mOsm/L); solution with propylene glycol, 4g of NaCl, 0.5g of KCl, 0.3g of MgCl2, 1g of calcium acetate, and 15mL of propylene glycol in 1000mL of water (measured osmolarity: 378mOsm/L). Physical evaluations and blood samples were collected immediately before the initiation of fluid therapy, at 3-hour intervals over the 12-hour period of fluid therapy, and 12 hours after the end of fluid therapy. Animals presented no signs of stress or discomfort. All solutions resulted in a significant decrease in erythrocyte concentration, hemoglobin concentration, and hematocrit, without affecting the leukogram. Enteral fluid therapy administered as continuous flow via the naso-ruminal route was well-tolerated by animals with minimal effects on animal welfare, even when administered for 12 hours. This technique is indicated as an alternative route for parenteral maintenance fluid therapy. Electrolyte solutions proposed here were able to significantly expand blood volume. Key words: ruminants; polyionic solutions; physiologic parameters; volemia; hemogram

ciência rural

Enteral fluid therapy administered in continuous flow by naso-ruminal route using three maintenance electrolyte solutions: effects on physiological biomarkers and the hemogram of bovines