Effect of Oxalidine Combined with Reduced-opioid Anesthesia on Multimodal Analgesia in Morbidly Obese Patients Undergoing Bariatric Surgery

"Opioid anesthesia group (OBA group) Anesthesia was induced with propofol 2.5mg·kg-1, rocuronium 0.6mg·kg-1 and sufentanil 0.3μg·kg-1. When BIS value reached 40-60, tracheal intubation was performed through visual laryngeal mask airway. Anesthesia was maintained with propofol 4-12 mg·kg-1·h-1 and remifentanil 0.2-0.5 μg·kg-1·min-1. Sufentanil 10μg was bridaged 30min before the end of surgery. The PCA dosing regimen was sufentanil 2 µg/kg+ dexmedetomidine 2 µg/kg+ ondansetron 24mg.~Reduced-opioid anesthesia group (OFA group)~Anesthesia was induced with propofol 2.5mg·kg-1, rocuronium 0.6mg·kg-1 and esketamine 0.3mg·kg-1. When BIS value reached 40-60, tracheal intubation was performed through visual laryngeal mask airway. Propofol 4-12 mg·kg-1·h-1 and esketamine 0.3-0.5 mg·kg-1·h-1 were pumped to maintain anesthesia during operation. Oxalidine 1.5mg was given in two divided doses of 0.75mg each time with an interval of 10min 30min before the end of surgery. The PCA regimen was as follows:"