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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.
1

Infusão contínua de propofol ou de etomidato em cães normocapneicos : efeitos intracranianos e hemodinâmicos /

Paula, Danielli Parrilha de. January 2006 (has links)
Orientador: Newton Nunes / Banca: Almir Pereira de Souza / Banca: Anderson Farias / Banca: Carlos Augusto Araújo Valadão / Banca: Paulo Sérgio Patto dos Santos / Resumo: Objetivou-se com este estudo avaliar os efeitos da infusao continua de propofol ou de etomidato, em caes anestesiados, sobre a pressao intracraniana (PIC), pressao de perfusao cerebral (PPC), temperatura intracraniana (TIC), frequencia cardiaca (FC), pressoes arteriais sistolica (PAS), diastolica (PAD) e media (PAM), debito e indice cardiaco (DC e IC, respectivamente), pressao venosa central (PVC), volume e indice sistolico (VS e IS, respectivamente), temperatura corporal (TC). Foram utilizados 20 caes adultos, machos ou femeas, higidos, sem raca definida. Os caes foram distribuidos equitativamente em dois grupos, denominados GP e GE. Os animais do GP foram induzidos a anestesia geral por meio de administracao intravenosa de propofol, na dose de 10 mg/kg. Os caes foram intubados com sonda de Magill acoplada ao aparelho de anestesia inalatoria e iniciou-se ventilacao controlada, com amplitude e frequencia suficientes para permitir leitura de capnometria constante em 35 mmHg. Ato continuo, iniciou-se a infusao continua de propofol, por meio de bomba de infusao, na dose de 0,8 mg/kg/min. Aos animais do GE, o procedimento foi o mesmo realizado no GP, substituindo-se o propofol pelo etomidato, que foi utilizado na dose de 5 mg/kg para inducao anestesica e 0,5 mg/kg/min para a manutencao, sendo que apos 10 minutos reduziu-se a dose para 0,2 mg/kg/min. Os parametros foram mensurados decorridos 30 minutos da implantacao do cateter de pressao intracraniana (M1) e se repetiu a cada 20 minutos (M2, M3 e M4) apos M1. A avaliacao estatistica das variaveis foi efetuada pela Analise de Perfil (p<0,05). Observou-se diferencas entre os grupos na PIC, TIC, FC, DC, IC e TC, onde as medias do GP foram superiores ao do GE, e na PPC, PVC, RVS e IRVS, onde as medias de GP foram inferiores as do GE...(Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Continuous rate infusion (CRI) of propofol or etomidate in the intracranial pressure (ICP), cerebral perfusion pressure (CPP), intracranial temperature (ICT), heart rate (HR), systolic (SAP), diastolic (DAP), and mean arterial pressures (MAP), cardiac output (CO) and index (CI), central venous pressure (CVP), stroke volume (SV) and index (SI), rectal temperature (RT) were analyzed, in twenty adult healthy males or females mongrel dogs allotted in GP and GE groups. In GP anesthesia was induced by administration of propofol (10 mg/kg IV) followed intracheal intubation to proceed controlled ventilation to mantain PaCO2 at 35 mmHg. Propofol CRI started subsequently at rate of 0.8mg/kg/min. For GE does etomidate (5 mg/kg IV) was used to induce and for maintenanceanesthesia, 0.5 mg/kg/min. After 10 minutes, the etomidato CRI was reduced to 0.2 mg/kg/min. Thirty minutes of intracranial catheter implantated (M1), and repeated at each 20 minutes (M2, M3, and M4). Statistical analysis was evaluated through ANOVA (P<0.05). Differences between groups were observed in ICP, ICT, HR, CO, CI, and RT when GP means were higher than GE. CPP and CVP were lower in GP when compared with GE. All parameters remained stable in each group during the study, except to ICT and RT that reduced gradually during the experimental period in GE animals. Continuous infusion of etomidate or propofol in dogs maintains cerebral perfusion, cerebral auto-regulation, and cardiovascular parameters in normal values. Dogs submitted to anesthesia with continuous infusion of etomidate demonstrated gradual reduction in rectal and intracranial temperature with severe hemolisys and myoclonus. / Doutor

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