Dural-Puncture Epidural Shows No Significant Difference in Cesarean Conversion Failure

In a retrospective cohort study evaluating obstetric anesthesia techniques, dural-puncture epidural was not associated with a statistically significant reduction in the rate of conversion failure to cesarean delivery anesthesia compared with conventional epidural analgesia. The observational investigation, published in BMC Anesthesiology by Zhengbin Pan and colleagues, examined clinical outcomes among singleton parturients undergoing intrapartum cesarean delivery following established labor analgesia.

Extending labor epidural analgesia to provide surgical anesthesia for cesarean delivery can sometimes fail, compelling clinicians to perform a repeat neuraxial procedure or transition the patient to general anesthesia. While prior clinical trials conducted in elective cesarean delivery settings suggested that dural-puncture epidural techniques could accelerate epidural extension, comparative evidence regarding its effectiveness following established labor analgesia in real-world intrapartum conditions has remained limited.

To address this evidence gap, the authors conducted a single-center retrospective cohort study encompassing parturients who received labor analgesia and subsequently underwent intrapartum cesarean delivery between September 2023 and April 2026. The study cohort comprised a total of 521 singleton parturients categorized by the specific neuraxial method employed during labor: 133 patients received dural-puncture epidural analgesia, while 388 patients received conventional epidural analgesia.

To account for baseline confounding inherent in non-randomized observational data, the investigators applied inverse probability of treatment weighting based on propensity scores, successfully balancing baseline covariates between the two treatment groups. The primary clinical outcome was conversion failure, specifically defined as the requirement for a repeat neuraxial procedure or conversion to general anesthesia.

Analysis of the primary outcome demonstrated that conversion failure occurred in 3 patients, representing 2.3 percent, in the dural-puncture epidural group, compared with 22 patients, representing 5.7 percent, in the conventional epidural group. Following inverse probability of treatment weighting adjustment, the difference between the two techniques did not reach statistical significance, yielding a weighted odds ratio of 0.36 with a 95 percent confidence interval ranging from 0.11 to 1.22 and a p-value of 0.101. Additional sensitivity analyses conducted for conversion failure yielded similar point estimates, with all corresponding confidence intervals crossing unity.

In secondary analyses, the investigators identified a statistically significant difference in anesthesia onset time, which was shorter in the dural-puncture epidural cohort at 15.05 ± 1.47 minutes compared with 15.80 ± 1.55 minutes in the conventional epidural cohort. This corresponded to an inverse probability of treatment weighted beta coefficient of -0.77 minutes, with a 95 percent confidence interval of -1.07 to -0.47 minutes and a p-value below 0.001. However, statistical estimates for the remaining secondary perioperative outcomes, including intraoperative pain, block characteristics, hemodynamic events, and maternal satisfaction scores, were imprecise, with their respective confidence intervals encompassing the null.

The authors concluded that dural-puncture epidural did not demonstrate a statistically significant difference in preventing conversion failure compared with conventional epidural analgesia in this intrapartum cohort. Although secondary analysis indicated an approximately 0.8-minute reduction in surgical anesthesia onset time with the dural-puncture technique, the researchers emphasized that the clinical importance of this modest difference remains uncertain. The authors noted that these observational findings offer real-world evidence regarding epidural conversion performance after established labor analgesia, providing data that can help guide clinical practice and inform the design of future prospective clinical studies.

Subject of Research: Conversion of labor epidural analgesia to cesarean delivery anesthesia

Article Title: Association of dural-puncture epidural with conversion of labor analgesia to cesarean delivery anesthesia: a propensity score-weighted retrospective cohort study

Article References: Pan, Z., Chen, J., Feng, J., Lv, H., & Pan, Y. (2026). Association of dural-puncture epidural with conversion of labor analgesia to cesarean delivery anesthesia: a propensity score-weighted retrospective cohort study. BMC Anesthesiology. https://doi.org/10.1186/s12871-026-04341-6

Image Credits: AI Generated

DOI: 10.1186/s12871-026-04341-6

Keywords: dural-puncture epidural, conventional epidural, labor analgesia, cesarean delivery anesthesia, conversion failure, repeat neuraxial procedure, general anesthesia conversion, intrapartum cesarean delivery, propensity score weighting, inverse probability of treatment weighting, anesthesia onset time, obstetric anesthesia, intraoperative pain, hemodynamic events, maternal satisfaction scores, singleton parturients, retrospective cohort study