8 artigos cocaina Flashcards

Anesthesia in Cocaine addicters: the risks of chemical interactions ; A Positive Cocaine Urine Toxicology Test and the Effect on Intraoperative Hemodynamics Under General Anesthesia

1
Q

Como age a cocaina?

A
  • Estimulacao de receptores alfa e beta

Inibicao da recaptacao de monoaminas (bloqueio de transportadores):

  • Dopamina
  • Nora
  • Serotonina
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2
Q

Principais enzimas responsáveis pelo metabolismo da cocaína:

A
  • Butylrylcholinesterase
  • Carboxylesterase Hepatica
  • N-demethylase (5%)
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3
Q

Efeitos antiarritmicos da Cocaina

A
  • Antiarritmico Classe I
  • Bloqueia canais de Na e K, interrompendo potencial de acao
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4
Q

Que drogas devem ser evitadas junto a Cocaina, por prolongarem o intervalo QT?

A
  • Metadona
  • Ondansetron
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5
Q

É preferivel anestesia geral ou local no paciente em uso de cocaína?

A

Anestesia geral

  • hipovolemia relativa com baixa resposta a vasopressores
  • comportamento combativo
  • percepcao dolorosa alterada
  • trombocitopenia induzida por cocaina
  • possivel risco de toxicidade com anestesicos locais (dose segura imprevisível)
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6
Q

Quais efeitos do uso cronico e agudo de cocaína com Succinilcolina?

A

Succinylcolina:

  • resposta prolongada em usuarios cronicos, devido a reducao de pseudocolinesterase
  • Intox aguda: competido de cocaina com succinyl no metabolismo (aumenta concentracao de ambos)
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7
Q

Sobre risco perioperatorio em pacientes usuários de cocaina (sem toxicidade aguda), o risco é maior ou menor do que em nao usuários?

A

Asymptomatic cocaine-positive patients undergoing elective noncardiac surgery under general anesthesia have similar percentages of intraoperative hemodynamic events compared to cocaine-negative patients. (Anesth Analg 2021;132:308–16)

Evidence shows that there are important interactions that can complicate the perioperative period, however these patients do not present higher risks of complications than the general population as a more recent study (Moon et al., 2020) has shown, corroborating the possibility of performing non-cardiac elective surgeries in these patients, if they do not show signs of intoxication, avoiding unnecessary postponement of surgical procedures (Ball and Westhorpe, 2003, Gazoni et al., 2006).

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8
Q

Drogas usadas na anestesia que devem ser evitadad

A

Lidocaina
Succinilcolina
Ketamina
Ondansetrona, metadona

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9
Q

Como calcular o Qt corrigido?

A

Qt / sqrt(R-R)

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