Ultrasound-guided transversus abdominis plane block for postoperative analgesia in living donor laparoscopic hepatectomy: a randomized, controlled, clinical study

INTERVENTION: Experimental group:Ultrasound‐guided transverse abdominal muscle block;Control group:local anesthetic wound infiltration; CONDITION: living donor laparoscopic hepatectomy PRIMARY OUTCOME: the cumulative opioid consumption within 24 hours post‐operatively; SECONDARY OUTCOME: VAS pain scores at rest and during movement;Quality of postoperative recovery;PCIA pump use;exhaust time, ambulation time, PACU time, and hospital stay;sleep in‐terruptions as a result of pain;use of rescue analgesics;time to first opioid use;ropivacaine plasma concentration; INCLUSION CRITERIA: 1. Aged 18 to 65 years, ASA I II; 2. Patients scheduled to undergo laparoscopic living donor hepatectomy with inflow occlusion (Pringle maneuver).