Median effective plasma concentration of propofol inhibiting body movement when combined with butorphanol in patients undergoing hysteroscopic surgery / 中国临床药理学与治疗学
Chinese Journal of Clinical Pharmacology and Therapeutics
;
(12): 1033-1037, 2020.
Article
in Chinese
| WPRIM
| ID: wpr-855782
ABSTRACT
AIM:
To determine the median effective plasma concentration (Cp50) of propofol inhibiting body movement when combined with butorphanol in patients undergoing hysteroscopic surgery.METHODS:
Twenty-one patients scheduled for elective hysteroscopic surgery under non-intubated intravenous anesthesia, age 20-55 years old, ASA physical status or Ⅱ, were enrolled in this study, and anesthesia was induced by target-controlled infusion of propofol. Hysteroscopy was performed only when the plasma concentration and the concentration of the effector chamber were balanced. Butorphanol 20 μg/kg was injected intravenously at 5 min before surgery. The depth of anesthesia and adverse reactions during anesthesia was monitored. The plasma target concentration (Cp) of propofol was determined by up-and-down method, the first patient was 2.5 μg/mL, each time Cp increased/decreased by 10% in the next patient depending on whether or not body movement occurred. The patients were divided into positive and negative groups according to the results. The Cp50 and 95% confidence inlerval (CI) of propofol inhibiting body movement were calculated by up-and-down formula when combined with butorphanol in patients undergoing hysteroscopic surgery.RESULTS:
The Cp50(95%CI) of propofol required to inhibit body movement was 2.23(2.12-2.34) μg/mL when combined with butorphanol in patients undergoing hysteroscopic surgery. None of the patients had serious adverse reactions.CONCLUSION:
The Cp50 of propofol required to inhibit body movement is 2.23 μg/mL when combined with 20 μg/kg butorphanol in patients undergoing hysteroscopic surgery. It provides a reference for safe dosage of anesthesia in hysteroscopic surgery.
Full text:
Available
Index:
WPRIM (Western Pacific)
Language:
Chinese
Journal:
Chinese Journal of Clinical Pharmacology and Therapeutics
Year:
2020
Type:
Article
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