335 Motor Sparing Peripheral Nerve Block: A Modern Approach to Total Knee Arthroplasty

Abstract Aim To maximise postoperative analgesia, whilst minimising opioid use, motor sparing peripheral nerve blocks have been described as an alternative to local infiltration analgesia (LIA) with adductor canal block (ACB) in total knee arthroplasty (TKA). At The Robert Jones and Agnes Hunt Orthopaedic Hospital, we developed a new technique, involving ten separate injections the four genicular nerves, saphenous nerve, vastus medialis, popliteal plexus medial, intermediate, lateral cutaneous nerves of thigh. aim was compare analgesic effect this type against LIA ACB TKA. Method Two groups were identified retrospectively. test group included fifty patients who received 5ml each 0.75% Levobupivacaine 40ml 0.25% plexus, nerves. A matched control standard treatment LIA. primary outcome consumption analgesics, measured morphine equivalent. Results For group, mean amount IV equivalent administered first 48-hours postoperatively 34mg vs 108mg. This equates 68% reduction compared group. Conclusions Motor provide significant results implications terms pain management, reduced opioid-induced side effects overall, enhanced patient recovery.