Periarticular Injection in Total Knee Arthroplasty.

Optimal pain management after total knee arthroplasty (TKA) can expedite postoperative recovery, improve perioperative outcomes, and increase patient satisfaction. Periarticular injections (PAIs) have become increasingly used to improve pain management after TKA. Similar to peripheral nerve blocks, the use of intraoperative PAIs can lower pain scores and expedite discharge from the hospital. However, there is notable variability in the ingredients and administration techniques of PAIs. Currently, no standard of care exists for PAIs, especially in the setting of adjuvant peripheral nerve blocks. This study seeks to evaluate the ingredients, administration techniques, and outcomes of PAIs used during TKA.