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An Experimental Paradigm for the Prediction of Post-Operative Pain PPOP
Published on: January 27, 2010
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Effects of Intraoperative Opioid Administration on Postoperative Pain and Pain Threshold: A Randomized Controlled
Ryoko Kawanaka1, Shoko Sakuma1, Hiroshi Kokubun1
1Department of Anesthesiology, Teikyo University Chiba Medical Center, Teikyo University, 3426-3 Anesaki, Ichihara City 299-0111, Chiba, Japan.
Journal of Clinical Medicine
|October 14, 2022
Summary
Intraoperative fentanyl and remifentanil co-administration caused postoperative hyperalgesia in gynecological surgery patients. Pain thresholds decreased significantly, regardless of fentanyl dosage, indicating a dose-independent effect.
Area of Science:
- Anesthesiology
- Pain Management
- Pharmacology
Background:
- Fentanyl and remifentanil are commonly used together during surgery.
- The impact of intraoperative opioid combinations on postoperative pain and pain thresholds requires further investigation.
Purpose of the Study:
- To evaluate the effect of intraoperative fentanyl and remifentanil co-administration on postoperative pain and pain thresholds.
- To compare pain outcomes between patients receiving sufficient versus minimum intraoperative fentanyl doses.
Main Methods:
- A randomized study involving 30 patients undergoing gynecological laparoscopic surgery.
- Patients were assigned to receive either sufficient (Group A) or minimum (Group B) fentanyl, with both groups receiving continuous remifentanil.
- Pressure pain threshold was measured using a pressure algometer 3 hours postoperatively.
Main Results:
- No significant difference in pressure pain threshold or numeric rating scale scores between groups at 3 hours postoperatively.
- A significant decrease in pain threshold was observed in both groups at 3 hours compared to preoperative values.
- Pain thresholds recovered by 24 hours postoperatively.
- Co-administration of fentanyl and remifentanil led to hyperalgesia, irrespective of fentanyl dose.
Conclusions:
- Intraoperative co-administration of fentanyl and remifentanil induces postoperative hyperalgesia in a dose-independent manner.
- While pain thresholds decreased postoperatively, they recovered within 24 hours.
- Further research is needed to understand the mechanisms of opioid-induced hyperalgesia in this context.
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