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Ketorolac does not decrease the MAC of halothane or depress ventilation in rats.

G F Rich1, R Schacterle, J C Moscicki

  • 1Department of Anesthesiology, University of Virginia Health Sciences Center, Charlottesville 22908.

Anesthesia and Analgesia
|July 1, 1992
PubMed
Summary
This summary is machine-generated.

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Intravenous ketorolac did not alter the minimum alveolar anesthetic concentration (MAC) or ventilation in rats. Higher doses of ketorolac did not affect MAC, suggesting no central nervous system effects on anesthesia.

Area of Science:

  • Anesthesiology
  • Pharmacology
  • Neuroscience

Background:

  • Intravenous ketorolac is commonly used for pain management.
  • Its effects on anesthesia and underlying mechanisms require further investigation.

Purpose of the Study:

  • To evaluate the impact of intravenous ketorolac on the minimum alveolar anesthetic concentration (MAC) and ventilation.
  • To explore potential central nervous system mechanisms of ketorolac's action during anesthesia.

Main Methods:

  • Rats were anesthetized with halothane.
  • Intravenous ketorolac was administered in various clinical and large doses (0.2 to 40 mg/kg).
  • Effects on MAC, resting end-tidal CO2 tension, CO2 response curves, and mean arterial blood pressure were measured.

Related Experiment Videos

Main Results:

  • Ketorolac did not affect halothane MAC or resting ventilation across all tested doses.
  • Mean arterial blood pressure remained stable except at the highest dose (40 mg/kg).
  • No significant changes in CO2 response curves were observed.

Conclusions:

  • Clinical doses of intravenous ketorolac do not influence MAC or ventilation.
  • Larger doses of ketorolac also lack effects on MAC and ventilation, indicating no central nervous system mechanisms impacting anesthesia.
  • Ketorolac appears safe concerning anesthetic and ventilatory parameters at tested doses.