This study is designed to determine if one anaesthetic modality, either motor sparing nerve
block or peri-articular local infiltration anaesthesia with infusion, is superior in
providing postoperative analgesia following total knee joint arthroplasty and if the efficacy
of analgesia affects TKA outcomes. These outcomes include pain and function for a period of
up to 3 months, narcotic consumption, and specific non-pain complications, including cardiac,
respiratory, central nervous system, thromboembolism, infection, nausea and vomiting and
urinary retention.

Economic outcomes will also be examined, including length of hospital stay, direct health
care costs and patient satisfaction.