[Alternative techniques to labour epidural analgesia].

Area of Science:

• Obstetrics and Gynecology
• Anesthesiology
• Neonatal Medicine

Context:

• Epidural analgesia is the gold standard for labor pain relief.
• Alternative systemic techniques are often used when epidurals are contraindicated or unavailable.
• These alternatives present a range of maternal and neonatal risks and benefits.

Purpose:

• To review the efficacy and safety of various systemic analgesia techniques for labor.
• To compare different systemic opioids, nitrous oxide, and sevoflurane for pain management during childbirth.
• To guide clinical practice regarding the appropriate use of alternative labor analgesia.

Summary:

• Systemic opioids (fentanyl, sufentanil, remifentanil, nalbuphine) show variable effectiveness and potential for neonatal respiratory depression, necessitating careful monitoring and naloxone availability.
• Pethidine is discouraged due to prolonged neonatal effects; nalbuphine offers a better profile. Intravenous patient-controlled analgesia (PCA) with fentanyl or sufentanil is preferred in early labor, while remifentanil is most effective but requires continuous supervision.
• Nitrous oxide 50% provides minimal pain relief but has few side effects and good satisfaction, suitable for advanced labor. Sevoflurane shows promise but requires further safety guidelines.

Impact:

• Highlights the limitations and risks associated with non-epidural labor analgesia, emphasizing the need for vigilant maternal and neonatal monitoring.
• Provides evidence-based comparisons to aid clinicians in selecting the safest and most effective systemic pain relief options when epidurals are not feasible.
• Identifies areas for future research, particularly regarding the safe implementation of newer agents like sevoflurane in labor.