Transient foot drop following motor-sparing regional anesthesia technique in total knee arthroplasty: a case report

Regional anesthesia provides excellent analgesia for total knee arthroplasty (TKA). Foot drop following motor-sparing regional anesthesia techniques is uncommon and typically transient, but it may obscure symptoms and potentially delay the diagnosis and treatment of peroneal nerve injury following TKA. We present a case of transient foot drop following an Infiltration between Popliteal Artery and Capsule of the Knee (iPACK) block in a 69-year-old female who underwent an elective TKA for her tricompartmental osteoarthritis. Although the iPACK block is generally considered motor-sparing, this case highlights a potential temporary neurological complication.