World's first revisional metabolic bariatric surgery under regional anesthesia:Laparoscopic conversion of sleeve gastrectomy to Roux-en-Y gastric bypass, acase report.

This case demonstrates the first documented successful performance of revisional RYGB (conversion from LSG) entirely under regional anesthesia (CTSEA with cervical blocks). It highlights the feasibility of this approach in a conversion procedure, resulting in enhanced recovery (early ambulation/oral intake, opioid avoidance, rapid discharge) and comparable surgical outcomes. This suggests regional anesthesia is a viable alternative to GA for selected patients undergoing complex bariatric surgery, warranting further comparative studies to evaluate its broader applicability, safety, and efficacy.