Objective:

To compare the analgesic efficacy of patient-controlled intravenous analgesia with and without background infusion for parturients receiving multimodal analgesia post cesarean delivery, specifically focusing on the implications for opioid consumption.

Approach:

Key Findings:

• No significant differences in patient-controlled analgesia demands during 0–24 h and 24–48 h between the two groups (p > 0.05).
• Background infusion group had significantly higher 48-h intravenous morphine equivalent doses postoperatively (p < 0.001).

Interpretation:

The addition of background infusion to patient-controlled intravenous analgesia did not enhance analgesic efficacy and resulted in increased opioid exposure, raising concerns about potential opioid-related side effects.

Limitations:

• Retrospective design may introduce selection bias, potentially affecting the generalizability of the findings.
• Lack of informed consent due to the nature of the study may limit ethical considerations.

Conclusion:

Patient-controlled intravenous analgesia without background infusion may be considered in parturients receiving multimodal analgesia, potentially reducing opioid exposure and associated risks.

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