SSSI Efficacy With iACB and PC-LIA in TKA Pain Management

20 mL ropivacaine or saline infiltrated lateral-to-medial subcutaneously above sartorius at femoral triangle apex using inject-as-you-advance technique, avoiding hyperechoic nerves.

An adductor canal catheter is inserted proximal-to-distally over a distance of 6-10 cm at femoral triangle apex, with an initial bolus of 10 mL of 0.3% ropivacaine administered in PACU. The following doses start at 9:00 PM on the day of surgery and are repeated every 12 hours,

PC-LIA consists of two 10 mL injections of 0.3% ropivacaine delivered intraoperatively to the posteromedial and posterolateral aspects of the posterior capsule before cementation. The target injection plane is the potential space between the posterior capsule and the popliteal artery.