Intraoperative Autonomic Neural Blockade

Inclusion Criteria: All adult patients scheduled for Laparoscopic Sleeve Gastrectomy(LSG) at each participating institution will be eligible for screening for study inclusion and granting of consent to study participation. Exclusion Criteria: The exclusion criteria will be the inability to perform an ANB because of anatomical difficulties, the need for revisional surgery, the need for concomitant surgical procedures beyond hiatal hernia repair, conversion to open surgical procedures, allergies to local anesthetics, and intraoperative complications (e.g., visceral or vascular perforations, or anesthesia-related complications requiring admission to intensive care).