The present study compared the effects of pectoral nerve block II (PECS II) and erector spinae plane (ESP) block for postoperative analgesia in patients who underwent modified radical mastectomy by performing a network meta-analysis (NMA) using indirect comparison with systemic analgesia. Studies comparing the analgesic effects of PECS II and ESP block were searched on MEDLINE, PubMed, EMBASE and the Cochrane Library. The primary outcome of this study was cumulative opioid consumption for 24 h postoperatively. Pain score during this period was also assessed. NMA was performed to compare the postoperative analgesic effects of plane blocks and systemic analgesia. A search of databases identified 17 studies, with a total of 1069 patients, comparing the analgesic efficacies of PECS II block, ESP block, and systemic analgesia. Compared with systemic analgesia, mean difference of opioid consumption was − 10 mg (95% credible interval [CrI] − 15.0 to − 5.6 mg) with PECS II block and − 5.7 mg (95% CrI − 11.0 to − 0.7 mg) with ESP block. Relative to systemic analgesia, PECS II block showed lower pain scores over the first postoperative 24 h, whereas ESP block did not. PECS II block showed the highest surface under the cumulative ranking curves for both opioid consumption and pain score. Both PECS II and ESP blocks were shown to be more effective than systemic analgesia regarding postoperative analgesia following modified radical mastectomy, and between the two blocks, PECS II appeared to have favorable analgesic effects compared to ESP block.
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This research was supported by the National Research Foundation of Korea, NRF-2019R1G1A1099660.
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Hong, B., Bang, S., Oh, C. et al. Comparison of PECS II and erector spinae plane block for postoperative analgesia following modified radical mastectomy: Bayesian network meta-analysis using a control group. J Anesth (2021). https://doi.org/10.1007/s00540-021-02923-x
- Postoperative pain
- Nerve block
- Modified radical mastectomy
- Network meta-analysis