Opioid-free Anesthesia as an Alternative to General Anesthesia in Patients Undergoing Duodenopancreatic Surgery by Laparotomy.

Inclusion Criteria: * Age 18-80 years * ASA II and III * Patient consent to the proposed regional anesthesia * Patient consent to participate in the study * Surgical procedure in the pancreaticoduodenal area by laparotomy Exclusion criterion * Patient refusal to participate in the study * Inability to operate the PCA pump * Lack of understanding of the NRS scale * Hypersensitivity to anesthetics * First- or second-degree heart block.