“…Safety-related outcomes of local anesthetic techniques may include opioid-related side effects (ie, PONV, pruritus, sedation, respiratory depression, hypotension, and urinary retention), block-related complications (ie, hematoma, organ injury, local anesthetic systemic toxicity, and block failure), and effects on breastfeeding or motherinfant interaction. [84][85][86] Respiratory depression, 14,37,51,78 hypotension, 32,37,38,53 urinary retention, 31,37,68,72 effects on breastfeeding or mother-infant interaction, 43,65,77 and block-related complications 37,39,41,43,50,73,80 were rarely reported in the involved study. Therefore, we selected PONV, pruritus, and sedation as the safety outcomes of this NMA.…”