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Related Experiment Videos

Hemodynamic response to induction and intubation. Propofol/fentanyl interaction

V Billard1, F Moulla, J L Bourgain

  • 1Département d'Anesthésie-Analgésie-Réanimation, Institut Gustave Roussy, Villejuif, France.

Anesthesiology
|December 1, 1994
PubMed
Summary

Increasing fentanyl doses with propofol anesthesia reduces post-intubation hypertension but may worsen pre-intubation hypotension. Propofol dose adjustments did not significantly alter hemodynamic changes during anesthesia induction.

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Area of Science:

  • Anesthesiology
  • Pharmacology
  • Cardiovascular Physiology

Background:

  • Propofol (intravenous anesthetic) can cause hypotension post-induction but reduce post-intubation hypertension.
  • Fentanyl (opioid analgesic) can attenuate post-intubation hypertension but exacerbate propofol-induced hypotension.

Purpose of the Study:

  • To investigate the relationship between propofol and fentanyl dosages and their impact on hemodynamic changes.
  • To analyze hemodynamic responses during pre-intubation and post-intubation phases following anesthesia induction.

Main Methods:

  • 120 patients (ASA I-II) were allocated into 12 groups, receiving varying doses of fentanyl (0, 2, 4 µg/kg) followed by propofol (2.0-3.5 mg/kg) intravenously.
  • Continuous arterial blood pressure monitoring was performed, with tracheal intubation occurring 4 minutes post-propofol administration.

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Main Results:

  • Fentanyl (2-4 µg/kg) significantly increased propofol-induced hypotension compared to no fentanyl (P<0.05).
  • Post-intubation hypertension was attenuated by fentanyl (2 µg/kg and 4 µg/kg) compared to no fentanyl (P<0.05).
  • Increasing propofol dose did not significantly alter hemodynamic responses, either pre- or post-intubation.

Conclusions:

  • Propofol dosage (2-3.5 mg/kg) does not significantly modify hemodynamic changes during anesthesia induction.
  • Maximal pre-intubation hypotension is associated with a 2 µg/kg fentanyl dose.
  • A fentanyl dose of 4 µg/kg effectively reduces post-intubation hypertension magnitude.