Multimodal analgesia based on ultrasound-guided regional block is widely used after total knee arthroplasty (TKA). The goal of this study was to investigate the analgesic efficiency and knee motor function of programmed intermittent infusion combined with adductor hiatus block in total knee arthroplasty. This prospective randomized controlled trial was approved by the Medical Ethics Committee of the First Affiliated Hospital of Chongqing Medical University (ethical approval number: 2024-302-01) ...