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Anaesthetic interaction between thiopentone and ketamine
L Roytblat1, J Katz, V Rozentsveig
1Department of Anaesthesiology, Soroka Medical Centre, Ben-Gurion University of the Negev, Beer Sheva, Israel.
European Journal of Anaesthesiology
|July 11, 1992
Summary
This study investigated the anesthetic effects of thiopentone and ketamine in 150 patients. The combination of these anesthetics demonstrated an additive interaction for both measured endpoints.
Area of Science:
- Anesthesiology
- Pharmacology
Background:
- Thiopentone and ketamine are commonly used anesthetic agents.
- Understanding their combined effects is crucial for optimizing anesthetic protocols.
Purpose of the Study:
- To evaluate the anesthetic effects of thiopentone, ketamine, and their combinations.
- To determine the interaction between thiopentone and ketamine during anesthesia.
Main Methods:
- 150 patients of ASA Grades I and II were studied.
- Endpoints included eye opening on command and motor response to trapezius muscle pressure.
- Dose-response curves were analyzed using probit procedure and isobolographic analysis.
Main Results:
- The interaction between thiopentone and ketamine was additive for both endpoints.
- This suggests that the combined effect is predictable based on individual agent effects.
Conclusions:
- The combination of thiopentone and ketamine exhibits an additive interaction for anesthetic endpoints.
- This finding supports the use of these agents in combination with predictable dose adjustments.