Related Experiment Videos
Xenon does not reduce opioid requirement for orthopedic surgery
Martin Luginbühl1, Steen Petersen-Felix, Alex M Zbinden
1Department of Anesthesiology, University Hospital, CH-3010 Bern, Switzerland. martin.luginbuehl@dkf.unibe.ch
Canadian Journal of Anaesthesia = Journal Canadien D'Anesthesie
|December 31, 2004
Summary
Seventy percent xenon anesthesia did not significantly reduce opioid requirements during orthopedic surgery compared to nitrous oxide and desflurane. The study found no substantial opioid-sparing effect, suggesting xenon is not superior for reducing intraoperative opioid use.
Area of Science:
- Anesthesiology
- Pharmacology
Background:
- Opioid-sparing effects of anesthetic agents are crucial for optimizing patient recovery and reducing side effects.
- Xenon is an inhalational anesthetic with potential analgesic properties.
- Nitrous oxide (N2O) and desflurane are commonly used anesthetic agents, with N2O having known opioid-sparing effects.
Purpose of the Study:
- To test the hypothesis that 70% xenon provides a significant opioid-sparing effect compared to a minimum alveolar concentration (MAC)-equivalent combination of N2O and desflurane.
- To determine the plasma alfentanil concentration required to suppress response to skin incision in 50% of patients (Cp50) under xenon versus N2O/desflurane anesthesia.
Main Methods:
- A randomized, controlled study involving 30 patients undergoing major orthopedic surgery.
- Patients were anesthetized with either 70% xenon or a MAC-equivalent combination of 70% N2O and 2% desflurane.
- Alfentanil plasma concentration was adjusted to suppress patient responses to skin incision, with responses defined by movement, hemodynamic changes, or autonomic reactions.
Main Results:
- The Cp50 of alfentanil was 83 ± 48 ng/mL with xenon and 49 ± 26 ng/mL with N2O/desflurane (P = 0.451), indicating no significant difference in opioid requirement.
- Intraoperative plasma alfentanil concentrations were similar between groups (95 ± 80 ng/mL with xenon vs. 93 ± 60 ng/mL with N2O/desflurane).
- Patients receiving xenon experienced slightly more bradycardia, while blood pressure remained comparable between groups.
Conclusions:
- Xenon anesthesia, compared to a MAC-equivalent combination of N2O and desflurane, does not substantially reduce opioid requirements in major orthopedic surgery.
- A small, clinically irrelevant difference in opioid sparing cannot be entirely excluded.
- The findings suggest xenon does not offer a significant advantage over N2O/desflurane in terms of intraoperative opioid reduction for this patient population.