Efficacy of transversus abdominis plane block in preventing chronic postsurgical pain: a systematic review and meta-analysis

Based on low to moderate certainty evidence, which is limited by significant heterogeneity, the TAP block for abdominal surgery may reduce the prevalence of CPSP. This potential benefit appears more pronounced with preoperative administration. However, these findings warrant cautious interpretation. Future large-scale, multicenter RCTs designating CPSP as a primary outcome are necessary to provide more definitive evidence.