Adductor Canal Block With Bupivacaine Liposome Versus Ropivacaine Pain Ball for Pain Control in Total Knee Arthroplasty: A Retrospective Cohort Study.

Background: Appropriate postoperative pain control following total knee arthroplasty is important in patient recovery. Adductor canal block (ACB) is a novel method to deliver anesthesia. There are currently no studies using bupivacaine liposome with ACB while also taking into account cost.