Peripheral Nerve Blocks vs Periarticular Local Anesthetic Injection for Total Knee Arthroplasty (TKA)

Subjects received Bupivacaine 0.5% preoperatively, then Bupivacaine 0.2% upon post anesthesia care unit (PACU) arrival via femoral nerve block, then Bupivacaine 0.25% via single-injection sciatic nerve.

Subjects received an intra articular injection with Ropivacaine, a total volume of 120 milliliters (mL) injected in the periarticular structures by the surgeon. Ropivacaine dose depended upon body weight: 50-74.9 kg: 200 mg, 75-99.9 kg: 300 mg, 100-125 kg: 400 mg.

Subjects received an intra articular injection with liposomal bupivacaine, a total volume of 120 mL injected in the periarticular structures by the surgeon. Patients weighing 50-125 kg received 266mg of Liposomal Bupivacaine.