Parâmetros ventilométricos, cardiovasculares, hematológicos e índice biespectral, em cães anestesiados com infusão contínua de propofol, associado ou não ao tramadol
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2009-12-02
Autores
Costa, Paula Ferreira da [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Avaliaram-se os efeitos da anestesia total intravenosa com propofol associado ou não ao tramadol sobre os parâmetros ventilométricos, cardiovasculares, hematológicos e índice biespectral em cães. Utilizaram-se oito animais submetidos a duas anestesias com 15 dias de intervalo, formando-se dois grupos (n=8): grupo controle (GC) e grupo tramadol (GT). Os animais foram induzidos à anestesia geral com propofol (10mg/kg) por via intravenosa. Seguindose, iniciou-se a infusão do fármaco na taxa de 0,7 mg/kg/min. Os cães foram mantidos em ventilação controlada a pressão de maneira a obter-se normocapnia, com FiO2=0,6. No GT os animais receberam, por via intravenosa, tramadol (2 mg/kg), seguido de infusão contínua do fármaco na taxa de 0,5 mg/kg/h, enquanto no GC, foi administrada solução de NaCl a 0,9%, seguido de infusão contínua da mesma solução, em volume idêntico ao empregado no GT. As mensurações das variáveis, exceto as hematológicas, iniciaram-se 30 minutos após o bolus de propofol (M0), e então em intervalos de 15 minutos, durante um período de 60 minutos (M15, M30, M45 e M60). Para os parâmetros hematológicos, uma amostra de sangue foi coletada antes da indução anestésica (Mbasal), 30 minutos após a indução (M0) e em intervalos de 30 minutos durante 60 minutos (M30 e M60). O método estatístico utilizado foi a Análise de Perfil (P<0,05). A associação de propofol e tramadol não promoveu alterações nos parâmetros ventilométricos, cardiovasculares e eletrocardiográficos avaliados e no índice biespectral, mas promoveu diminuição da temperatura corpórea (TC), redução da contagem de hemácias (He), hemoglobina (Hb) e hematócrito (Ht). O sinergismo do tramadol com propofol também reduziu as contagens de leucócitos totais (Le) e linfócitos (Linf).
The effects of total intravenous anesthesia with propofol associated or not to tramadol on ventilometric, cardiovascular, hematologic and bispectral index parameters in dogs were evaluated. Eight adult mongrel dogs were anesthetized on 2 occasions, 15 d apart, in a randomized crossover fashion. Two groups were formed: control group (GC) and tramadol group (GT). Propofol was used for induction (10 mg/kg IV) followed by a continuous rate infusion at 0.7 mg/kg/min. The animals were kept in pressure controlled ventilation with FiO2=0.6 with the aim to produce normocapnia. In GT, the tramadol bolus (2 mg/kg) followed by a continuous rate infusion at 0.5 mg/kg/min was administered in dogs via intravenous route. While, in GC, the NaCl to 0.9% was administrated followed by its continuous rate infusion, in the same volume that was used in GT. The measurement of all variables, except the hematologic parameters, was performed 30 minutes after propofol bolus (M0), and then, in intervals of 15 minutes, during 60 minutes (M15, M30, M45 and M60). For hematologic parameters, a blood sample was collected before anesthesia induction (Mbasal), 30 minutes after induction (M0) and, then, in intervals of 30 minutes during 60 minutes (M30 and M60). Numeric data were submitted to Profile analysis (P<0,05). The association of propofol and tramadol did not promote changes in bispectral index, ventilometric, cardiovascular and electrocardiographic parameters, but it promoted corporal temperature (TC) decrease and reduction in counting of hemaceas (He), hemoglobin (Hb) and hematocrit (Ht). The synergism of tramadol with propofol reduced the counting of total leukocytes (Le) and lymphocytes (Lymph).
The effects of total intravenous anesthesia with propofol associated or not to tramadol on ventilometric, cardiovascular, hematologic and bispectral index parameters in dogs were evaluated. Eight adult mongrel dogs were anesthetized on 2 occasions, 15 d apart, in a randomized crossover fashion. Two groups were formed: control group (GC) and tramadol group (GT). Propofol was used for induction (10 mg/kg IV) followed by a continuous rate infusion at 0.7 mg/kg/min. The animals were kept in pressure controlled ventilation with FiO2=0.6 with the aim to produce normocapnia. In GT, the tramadol bolus (2 mg/kg) followed by a continuous rate infusion at 0.5 mg/kg/min was administered in dogs via intravenous route. While, in GC, the NaCl to 0.9% was administrated followed by its continuous rate infusion, in the same volume that was used in GT. The measurement of all variables, except the hematologic parameters, was performed 30 minutes after propofol bolus (M0), and then, in intervals of 15 minutes, during 60 minutes (M15, M30, M45 and M60). For hematologic parameters, a blood sample was collected before anesthesia induction (Mbasal), 30 minutes after induction (M0) and, then, in intervals of 30 minutes during 60 minutes (M30 and M60). Numeric data were submitted to Profile analysis (P<0,05). The association of propofol and tramadol did not promote changes in bispectral index, ventilometric, cardiovascular and electrocardiographic parameters, but it promoted corporal temperature (TC) decrease and reduction in counting of hemaceas (He), hemoglobin (Hb) and hematocrit (Ht). The synergism of tramadol with propofol reduced the counting of total leukocytes (Le) and lymphocytes (Lymph).
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Palavras-chave
Cão, Anestesia veterinaria, Hematologia, Ventilometria, Propofol, Tramadol, Total intravenous anesthesia, Tramadol, propofol, Hematology, Ventilometry
Como citar
COSTA, Paula Ferreira da. Parâmetros ventilométricos, cardiovasculares, hematológicos e índice biespectral, em cães anestesiados com infusão contínua de propofol, associado ou não ao tramadol. 2009. xxiv, 90 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, 2009.