The Impact of Different Regional Anesthesia Techniques on the Incidence of Chronic Post-surgical Pain in Patients Undergoing Video-Assisted Thoracoscopic Surgery: A Network Meta-analysis.

Introduction: Chronic post-surgical pain (CPSP) remains a prevalent issue following video-assisted thoracic surgery (VATS), despite advancements in surgical techniques. Various regional anesthesia techniques, including thoracic paravertebral block (PVB), intercostal nerve block (ICNB), serratus anterior plane block (SAPB), erector spinae plane block (ESPB), and thoracic epidural anesthesia (TEA), have been employed in VATS procedures to mitigate this issue. This study aims to compare the efficacy of these analgesia methods in reducing the incidence of CPSP in VATS patients through a network meta-analysis.

Methods: A systematic search was conducted in PubMed, the Cochrane Library, and EMBASE for randomized controlled trials (RCTs) comparing the incidence of CPSP associated with PVB, ICNB, SAPB, ESPB, and TEA. The occurrence of CPSP was evaluated at both 2-3 months and 6 months post-surgery.

Results: Six RCTs, involving 652 patients, were included in the analysis of CPSP incidence at 2-3 months, while seven RCTs, involving 715 patients, were included for 6 months analysis. PVB, ICNB, or TEA reduced CPSP incidence compared with control group (without regional anesthesia techniques) at both 2-3 months and 6 months post-surgery. However, SAPB was found less effective in reducing CPSP incidence at 2-3 months post-VATS compared to PVB, ICNB, or TEA.

Conclusions: PVB, ICNB, and TEA exhibit significant effects on reducing CPSP incidence following VATS. Conversely, SAPB is not recommended for reducing CPSP incidence post-VATS. Nonetheless, considering the limitation of a small sample size in this network meta-analysis, additional RCTs are necessary to validate these conclusions and enhance the management of CPSP after VATS.