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Opioid-free anesthesia reduces postoperative nausea and vomiting but does not improve overall postoperative recovery in elderly patients undergoing laparoscopic abdominal surgery

In a randomized controlled trial of 195 elderly patients undergoing laparoscopic abdominal surgery, opioid-free anesthesia (OFA) resulted in higher QoR-15 scores at 24h (110 vs 106, mean difference 4 points, 95% CI 2-8, p=0.002), but this difference was below the prespecified threshold for clinical significance and disappeared by 48h. OFA reduced PONV during the first 72h and modestly accelerated gastrointestinal recovery, but was associated with longer extubation times, prolonged PACU stay, and more intraoperative hypertension.

Last updated: Aug 11, 2026•1 RCTs•📖 Read as article →

Evidence Score

Evidence Score44/100
Human RCT★★☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

Study Evidence

Study 1. Effect of opioid-free anesthesia on postoperative recovery in elderly patients undergoing laparoscopic abdominal surgery: a randomized controlled trial.

rct

Zhao Q, Wang Y, Huang F, Xiao Z, Xu X · Frontiers in medicine (2026)

Participants: 195
Duration: 3 months for chronic pain follow-up
Intervention: Opioid-free anesthesia (OFA) using dexmedetomidine, esketamine, and lidocaine compared to conventional opioid-based anesthesia (OA)
Outcome: Quality of recovery (QoR-15) at 24h, PONV, pain scores, opioid consumption, gastrointestinal recovery, sleep quality, chronic postsurgical pain, hemodynamic events, extubation time, PACU length of stay, hospital length of stay, postoperative delirium
Effect Size: Mean difference 4 points on QoR-15 (95% CI 2-8)
Population: Elderly patients (aged ≥60 years) undergoing elective laparoscopic abdominal surgery

Result: In a randomized controlled trial of 195 elderly patients undergoing laparoscopic abdominal surgery, opioid-free anesthesia (OFA) resulted in higher QoR-15 scores at 24h (110 vs 106, mean difference 4 points, 95% CI 2-8, p=0.002), but this difference was below the prespecified threshold for clinical significance and disappeared by 48h. OFA reduced PONV during the first 72h and modestly accelerated gastrointestinal recovery, but was associated with longer extubation times, prolonged PACU stay, and more intraoperative hypertension.

PubMed: 42559212DOI: 10.3389/fmed.2026.1862614

Mechanism Graph

OFA avoids intraoperative opioids, reducing opioid-related adverse effects like PONV and gastrointestinal dysfunction
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Dexmedetomidine, esketamine, and lidocaine provide analgesia and sedation without opioids
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Reduced PONV and earlier gastrointestinal recovery may contribute to improved early recovery scores
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However, the overall QoR-15 improvement was not clinically significant, and delayed emergence and hemodynamic instability offset benefits

Limitations

  • ⚠Single-center study, limiting generalizability
  • ⚠The primary outcome difference was below the minimal clinically important difference (MCID) for QoR-15
  • ⚠Chronic postsurgical pain finding at 3 months was exploratory and not prespecified
  • ⚠Open-label design (no blinding) may introduce bias

Frequently Asked Questions

What is opioid-free anesthesia (OFA)?▼

OFA is a technique that avoids intraoperative opioids, using alternative drugs like dexmedetomidine, esketamine, and lidocaine for pain management.

Does OFA improve recovery after surgery in elderly patients?▼

OFA did not produce a clinically meaningful improvement in overall recovery (QoR-15) at 24h, though it reduced PONV and accelerated gastrointestinal recovery.

What are the risks of OFA?▼

OFA was associated with longer extubation times, prolonged PACU stay, and a higher incidence of intraoperative hypertension.

Is OFA recommended for elderly patients undergoing laparoscopic surgery?▼

The study suggests that OFA's main benefit is reducing opioid-related side effects, but it does not substantially enhance global recovery, so its use should be weighed against potential drawbacks.

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References

  1. 1.Zhao Q, Wang Y, Huang F, Xiao Z, Xu X. "Effect of opioid-free anesthesia on postoperative recovery in elderly patients undergoing laparoscopic abdominal surgery: a randomized controlled trial.." Frontiers in medicine, 2026. PMID: 42559212 DOI: 10.3389/fmed.2026.1862614
Disclaimer: This content is for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.