Single-dose liposomal bupivacaine versus continuous ropivacaine infusion for adductor canal block analgesia after total knee arthroplasty

• Single-dose liposomal bupivacaine provides comparable analgesia to continuous ropivacaine infusion for 72 hours after total knee arthroplasty. • Single-dose liposomal bupivacaine significantly reduces procedure time (6.1 vs 20.3 minutes) and cost (saving 132 RMB per patient). • No significant differences in pain scores, morphine consumption, hospital stay, or patient satisfaction between the two techniques. • Single-dose liposomal bupivacaine avoids catheter-related complications and is a more efficient, cost-effective alternative.