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Intraoperative opioid and non-opioid administration patterns and early postoperative pain: A single-center retrospective longitudinal study

Gregory Smith, MD, Marcel E. Durieux, MD, PhD, Siny Tsang, PhD, Bhiken I. Naik, MBBCh

Abstract


Objective: Characterize changes in intraoperative opioid and non-opioid administration over time and to evaluate self-reported pain scores in the immediate postoperative period.

Design: Single-center retrospective longitudinal study.

Setting: Academic medical center.

Patients, participants: All patients presenting for surgery between 2011 and 2017 in both an inpatient and outpatient setting.

Main outcome measure(s): Determine total intraoperative opioid administration using intravenous oral morphine equivalents standardized to weight and intraoperative non-opioid use. Furthermore, postoperative self-reported pain scores within 2 hours of completion of surgery are reported.

Results: A total of 112,167 individual cases were identified from March 2011 to June 2017. There was a sustained and significant reduction in intraoperative mean and median opioid administration [2011: 0.16 ± 0.15 mg/kg and 0.13 (0-4.92) mg/kg vs 2017: 0.09 ± 0.09 mg/kg and 0.07 (0-4.17) mg/kg]. These effects are seen in emergent vs elective surgery, ambulatory vs inpatient, preoperative opioid use vs no preoperative opioid use, and those with and without intraoperative loco-regional procedures. Although median number of intraoperative non-opioid analgesic agents was unchanged over time, average difference in the number of intraoperative non-opioids increased over time. Finally, pain scores decreased over time [2011: mean (standard deviation) and median (range): 5.1 ± 2.62 and 5.4 (0-10) vs 2017: 3.29 ± 3.27 and 3 (0-10)].

Conclusion: This study confirms that intraoperative opioid use has decreased over time with increased utilization of non-opioid analgesic adjuncts and a commensurate decrease in immediate postoperative pain.


Keywords


opioids, non-opioids, postoperative pain

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References


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DOI: https://doi.org/10.5055/jom.2019.0528

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