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      Parametric evaluation of methotrimeprazine-midazolam-ketamine and methotrimeprazine-midazolam-ketamine-xylazine combination in dogs Translated title: Avaliação paramétrica das associações levomepromazinamidazolam-cetamina e levomepromazinamidazolamcetamina-xilazina em cães

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          Abstract

          PURPOSE: To evaluate the parameters of dogs anesthetized by different dissociative drugs protocols through continuous intravenous infusion. METHODS: Thirty healthy dogs of both sexes were assigned randomly to three groups (G1, G2, and G3). G1 was administered with methotrimeprazine as a pre-anesthetic medication, intravenously midazolam-ketamine as bolus for induction and midazolam-ketamine by continuous intravenous infusion for a 60 minute-period of maintenance. G2: the same as for G1. plus an increase in the midazolam dose during maintenance. G3: the same treatment as for G2, plus the addition of xylazine during maintenance. Immediately after induction the anesthetic maintenance started, and measures were taken 15 minutes after pre-medication, at 10 minutes intervals, during maintenance (M0 to M7). RESULTS: Bradycardia, atrioventricular blockage, bradypnea and hypoxemia were shown in G3. G1 and G2 showed a slight hypotension only. CONCLUSION: There were some advantages by using the continuous intravenous via: no parameters oscillation and reduction in the anesthetic recovery period. The increase in midazolam dose brought about little parametric variations which were greater when xylazine was used, with a consequent hypoxemia, bradyarrhytmia, and decrease in respiratory frequency and minute volume.

          Translated abstract

          OBJETIVO: Avaliar os parâmetros de cães anestesiados com diferentes protocolos de fármacos dissociativos por infusão intravenosa contínua. MÉTODOS: Foram utilizados 30 cães, machos e fêmeas, clinicamente sadios, distribuídos aleatoriamente em três grupos (G1,G2 e G3) (*)). Em G1 utilizou-se levomepromazina como medicação pré-anestésica (MPA), midazolam-cetamina pela via intravenosa em bolus para indução e midazolam-cetamina em infusão intravenosa contínua por 60 minutos para manutenção. Em G2 procedeu-se da mesma forma que em G1 elevando-se, porém, a dose de midazolam durante a manutenção. Em G3 repetiu-se o tratamento empregado em G2, acrescentando-se a xilazina à manutenção. Após a indução, iniciou-se imediatamente a manutenção anestésica, realizando-se aferições, 15 minutos depois da MPA, em intervalos de 10 minutos, durante a manutenção (M0 a M7). RESULTADOS: Em G3 ocorreu bradicardia, bloqueio átrio-ventricular, bradipnéia e hipoxemia e em G1 e G2, discreta hipotensão. CONCLUSÃO: A via intravenosa contínua apresentou vantagens quanto a: não oscilação dos parâmetros e redução no período de recuperação anestésica. A elevação da dose de midazolam resultou em discretas variações paramétricas, estas, acentuadas pelo uso da xilazina, que causou hipoxemia, bradiarritmia, diminuição da freqüência respiratória e volume minuto.

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          Most cited references20

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          Análise de medidas repetidas em experimentos biológicos

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            Pharmacologic effects of ketamine and its use in veterinary medicine.

            Nat Wright (1982)
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              A technique for approximately maintaining constant plasma level of intravenous drugs

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                acb
                Acta Cirurgica Brasileira
                Acta Cir. Bras.
                Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia (São Paulo )
                1678-2674
                October 2006
                : 21
                : 5
                : 304-309
                Affiliations
                [1 ] Regional University of Gurupi Brazil
                [2 ] Universidade Estadual Paulista Brazil
                [3 ] Faculty of Campo Mourão Brazil
                [4 ] Faculty of Veterinary Medicine and Zootechny Department of Surgery and Veterinary Anesthesiology of Botucatu Brazil
                Article
                S0102-86502006000500006
                10.1590/S0102-86502006000500006
                e49b8661-5836-4d55-b3a5-2b5453928c13

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0102-8650&lng=en
                Categories
                SURGERY

                Surgery
                Anestesia,Metotrimeprazina,Midazolan,Xilazina,Cães,Dogs,Anesthesia,Methotrimeprazine,Midazolam,Xylazine
                Surgery
                Anestesia, Metotrimeprazina, Midazolan, Xilazina, Cães, Dogs, Anesthesia, Methotrimeprazine, Midazolam, Xylazine

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