Recently, adductor canal block (ACB) has been reported as an effective means of providing post-operative analgesia for TKA. The ACB is not a new block, having been first described by van der Wal over 20 years ago. The adductor canal block, in the context of analgesia following TKA, is relatively recent, being first described by Tsai et al in 2010. Infiltration of local anesthetic into the adductor canal blocks primarily the saphenous nerve, a sensory nerve, which supplies the medial and anteromedial aspects of the knee via an infra patellar branch.