• Minerva anestesiologica · Jan 2023

    Meta Analysis

    Usefulness of Analgesia Nociception Index for guiding intraoperative opioid administration: a systematic review and meta-analysis.

    • Kuo-Chuan Hung, Po-Chih Chang, Chih-Wei Hsu, Kuo-Mao Lan, Shu-Wei Liao, Yao-Tsung Lin, Ping-Wen Huang, and Cheuk-Kwan Sun.
    • Department of Anesthesiology, Chi Mei Medical Center, Tainan, Taiwan.
    • Minerva Anestesiol. 2023 Jan 1; 89 (1-2): 748474-84.

    IntroductionThis study primarily aimed at investigating the efficacy of Analgesia Nociception Index (ANI) for guiding intraoperative opioid administration in patients receiving surgery under general anesthesia.Evidence AcquisitionThe Medline, Embase, Google scholar, and the Cochrane Library databases were searched from inception to April 2022 for randomized controlled trials. The primary outcome was intraoperative opioid administration, while the secondary outcomes included postoperative opioid consumption, pain score, emergency time, risk of nausea/vomiting (PONV), and Postanesthesia Care Unit (PACU) stay.Evidence SynthesisSix studies including 399 participants (published from 2015 to 2022) focused on non-cardiac surgery, including spine surgery (two trials), breast surgery (two trials), gynecologic surgery (one trial), and laparoscopic cholecystectomy (one trial) were included. Meta-analysis revealed no difference in intraoperative opioid administration with the use of ANI-guided analgesia compared to the control group that used conventional clinical measurements (e.g., heart rate) to guide opioid use [standardized mean difference (SMD)=-0.17, 95% CI: -0.56 to 0.22, P=0.39, I2=72%, six trials, 399 participants]. Gender-based subgroup analysis showed effectiveness of ANI for reducing opioid administration in female patients (SMD=-0.53, P=0.02). There were no differences in postoperative recovery characteristics including pain score [Mean difference (MD): -0.03, P=0.79], opioid consumption (SMD: -0.34, P=0.08), emergence time (MD=1.12, P=0.47), length of stay in the PACU (MD: -0.56, P=0.83), and risk of PONV [risk ratio(RR): 0.75, P=0.46] between the two groups.ConclusionsAnalgesia nociception index-guided analgesia was unable to reduce intraoperative opioid administration compared to monitoring using conventional clinical parameters. Further studies are required to support our findings.

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