Opioid-sparing Anesthesia in Cardiac Surgery: A Meta-analysis

Area of Science:

• Anesthesiology
• Cardiothoracic Surgery
• Pharmacology

Background:

• Opioid-based anesthesia is standard for cardiac surgery but carries risks.
• Opioid-sparing strategies aim to mitigate these risks while ensuring adequate analgesia.
• Enhanced recovery after surgery (ERAS) protocols increasingly incorporate multimodal pain management.

Purpose of the Study:

• To systematically review and meta-analyze the impact of opioid-sparing versus opioid-based anesthesia in adult cardiac surgery.
• To compare key outcomes including opioid consumption, ICU length of stay, ventilation duration, pain, and mortality.

Main Methods:

• Systematic literature search of randomized controlled trials and observational studies (2015-2025).
• Meta-analysis of data from 27 studies including 58,998 patients.
• Outcomes assessed: opioid consumption (MME), ICU stay, ventilation duration, pain scores, mortality.

Main Results:

• Opioid-sparing anesthesia significantly reduced opioid consumption (-2.48 MME).
• Associated with shorter ICU stays (OR: 1.32) and reduced mechanical ventilation (OR: 1.46).
• Lower postoperative pain scores at 12 hours (OR: 1.18); no significant mortality difference.

Conclusions:

• Opioid-sparing strategies support enhanced recovery protocols in cardiac surgery.
• These strategies reduce opioid burden and improve key recovery metrics.
• Further research with standardized reporting is needed to confirm safety and efficacy.