Anestésicos intravenosos
Autor: Lígia Martins | Publicado: 2011-10-05T17:55:00-07:00

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; O tiopental é um barbitúrico que atravessa rapidamente a barreira hematoencefálica. Não é capaz de impedir as respostas involuntárias à dor. Possui janela terapêutica estreita e pode causar depressão cardiovascular, mas mesmo em doses normais causa sonolência e depressão respiratória em baixa intensidade, durante a recuperação.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; O etiomidato apesar de ser similar ao tipental possui uma janela terapêutica mais ampla, com isso o risco de depressão cardiovascular é menor. Não deve ser usado em pacientes com insuficiência supra-renal, pois existe o risco de suprimir esta glândula. Existe a possibilidade de que ocorram movimentos involuntários durante a indução.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; O propofol é usado em cirurgias simples por infusão contínua, isso porque não possui efeito acumulativo. Metabolizado rapidamente, não causa movimentos involuntários ou supressão da supra-renal.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A cetamina ainda é usada em procedimentos menores na pediatria, apesar de causar anestesia dissociativa, aumento da pressão intracraniana e efeitos alucinógenos.