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Updated: Aug 5, 2026
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An Experimental Paradigm for the Prediction of Post-Operative Pain (PPOP)
Published on: January 27, 2010
Association Between Intraoperative Arterial Oxygen Tension and Postoperative Opioid Consumption: A Large-Scale Cohort
Moon Ok Lee1, Hanna Koh1, Sung-Ae Cho1
1Department of Anesthesiology and Pain Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, 158 Paryong-ro, Masanhoewon-gu, Changwon-si 51353, Gyeongsangnam-do, Republic of Korea.
Medicina (Kaunas, Lithuania)
|July 28, 2026
Summary
Higher intraoperative arterial oxygen tension (PaO2) reduced postoperative opioid use and rescue analgesic frequency in non-cardiac surgery patients. This occurred without increasing pulmonary complications, suggesting a potential role in pain management.
Area of Science:
- Anesthesiology
- Critical Care Medicine
- Pain Management
Background:
- The clinical impact of hyperoxia, including analgesic effects and pulmonary risks, is debated.
- Investigating higher intraoperative arterial oxygen tension (PaO2) for pain relief and safety is crucial.
Purpose of the Study:
- To determine if higher intraoperative PaO2 reduces postoperative analgesic requirements.
- To assess the association between higher intraoperative PaO2 and postoperative pulmonary complications (PPCs).
Main Methods:
- Retrospective cohort study of 1194 non-cardiac surgery patients.
- Patients divided into lower (PaO2 ≤ 200 mmHg) and higher (PaO2 > 200 mmHg) groups.
- Overlap weighting used to balance covariates; primary outcomes: postoperative opioid consumption (MME) at 0-24 and 24-48h.
Main Results:
- Higher PaO2 group had significantly lower strong opioid consumption (24-48h) and fewer rescue analgesics.
- No significant differences in pain intensity or 0-24h opioid use.
- No significant difference in total PPCs or adverse events between groups.
Conclusions:
- Higher intraoperative PaO2 is linked to decreased opioid needs and rescue analgesic frequency post-surgery.
- This association was observed without an increase in PPCs or adverse events.
- Further prospective studies are warranted to confirm PaO2's role in perioperative analgesia.