Erector spinae plane block provides comparable analgesic efficacy to paravertebral plane block in breast cancer surgeryComparing Two Different Nerve Blocks for Pain Relief During Breast Cancer Surgery

This meta-analysis evaluated the efficacy and safety of regional anesthesia techniques for patients undergoing breast cancer surgeries. The study included a total population of 1527 patients to compare the erector spinae plane block (ESPB) against the paravertebral plane block (PVB). The primary objective was to determine if these two regional techniques provided comparable levels of analgesia and impact on opioid consumption during and after surgery.

The study focused on several key clinical indicators for pain management. These included post-operative morphine consumption, duration of analgesia, and both resting and dynamic pain scores. Additionally, the analysis looked at secondary outcomes such as the incidence of postoperative nausea and vomiting (PONV), intraoperative fentanyl use, the number of patients requiring rescue analgesia, and total surgery duration.

Regarding primary outcomes, the meta-analysis found that post-operative morphine consumption was comparable in both groups. There were no significant differences reported between ESPB and PVB regarding analgesia duration or pain scores at rest and during movement. Furthermore, the number of patients requiring rescue analgesia showed similar results across both intervention groups. These findings suggest that both techniques provide a comparable level of baseline and dynamic pain relief for breast cancer surgery patients.

Secondary outcomes also demonstrated high levels of similarity between the two techniques. The incidence of PONV was comparable in both groups, and intraoperative fentanyl use did not differ significantly between those receiving ESPB and those receiving PVB. These results suggest that neither technique offers a distinct advantage over the other regarding common side effects or the need for supplemental opioids during the operative period.

One notable finding occurred in the secondary outcome of surgery duration. The analysis reported a shorter surgery duration for ESPB compared to PVB, with an effect size of -0.04 (95% CI; -0.07 to 0.00, P=0.023). However, the authors noted that this specific difference in surgical time was considered clinically negligible. This suggests that while a statistical difference exists, it may not translate into a meaningful practical advantage for surgical workflow.

Safety and tolerability data were not specifically reported as distinct adverse event rates or serious complications in the provided summary. The study highlights that both ESPB and PVB are viable options for regional anesthesia in breast cancer surgery. While ESPB might offer a slightly shorter duration, the clinical significance of this finding is limited.

Methodological limitations included the observation that the reduction in surgery time for ESPB was clinically negligible. Because these results are based on a meta-analysis of randomized controlled trials, clinicians should interpret the findings as an association between the technique and the outcomes rather than a definitive causal link. The evidence suggests that both techniques provide comparable analgesic efficacy.

Clinical implications suggest that providers can choose either ESPB or PVB based on institutional preference or clinician expertise, as neither shows superior performance in pain scores or morphine consumption. Future research may need to clarify if specific patient subsets benefit more from one technique over the other, though current data suggests parity in primary analgesic outcomes.