12 Etomidato Flashcards

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1
Q

Caracteristicas farmacologicas do Etomidato

A
  • Derivado imidazolico
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2
Q

Qual a solubilidade do Etomidato

A

Altamente hidrofobico

*Condicionar em emulsão lipidica (lipuro) ou utilizar propilenoglicol (irritante para veia: dor e flebite, diminuídos com Lidocaina)

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3
Q

Mecanismo de acao do Etomidato (3)

A
  • Facilitador do estimulo GABA
  • Hiperpolariza o neuronio
  • Cardioestabilidade

(Miller ainda menciona pequena elevacao da PA secundaria aos receptores alfa-2b, na musculatura lisa vascular com vasoconstriccao)

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4
Q

Efeitos do Etomidato no SNC (5)

A
  • PPC preservada
  • Neuroexcitacao: mioclonias, soluços
  • Mapeamento intraoperatorio (bom para epilepsias)
  • Menor incidencia de Delirium
  • Altamente Emetogenico
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5
Q

por que o Etomidato ↓FSC mas preserva a perfusao cerebral?

A
  • ↓Taxa metabólica cerebral e consumo de O₂
  • ↓FSC

A taxa metabolica diminui mais do que o FSC: a perfusao tende a estar preservada, tenho mais fluxo do que antes

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6
Q

Vantagens do Etomidato na inducao anestesica (2)

A
  • VA dificil - nao deprime o drive respiratorio com muita intensidade
  • Cardioestabilidade
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7
Q

Efeito do Etomidato na Supra-Renal

A

Acao na 17a-OH e 11b-OH

  • Suprime a atividade dessas enzimas, inibindo a formacao de cortisol e aldosterona. Mesmo doses habituais de infusao podem suprimir.
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8
Q

Is etomidate’s adrenal suppression long lasting if a single dose for anesthesia induction used?

A

The adrenal suppression from a single dose of etomidate begins shortly after administration and can last for approximately 4 to 8 hours, though some studies report effects lasting up to 24 hours.
Clinical Impact: In most healthy patients undergoing surgery, this transient suppression is generally not clinically significant and does not lead to noticeable adverse effects.

While etomidate’s adrenal suppression after a single induction dose is not typically long-lasting or clinically significant in healthy individuals, it can be more consequential in critically ill patients.

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