Post-operative analgesia following hip surgery: A single injection of 0.25% bupivacaine through posterior lumbar plexus block using a neurostimulator

Objectives: The lumbar plexus is located between the quadrates lumborum and the psoas major muscles. The aim of this study was to evaluate the efficacy of a single 0.25% of enantiomeric excess levobupivacaine (S75:R25) injection through the psoas compartment blockage in postoperative analgesia of patients undergoing hip orthopedic surgery. As the second objective was evaluated the presence of analgesia of the feet was also evaluated to determine whether there was dissemination to the sciatic nerve, and length of pre-operative fasting, presence of thirst and hunger in the operating room entrance, and the ability to receive net carbohydrate (CHO) after recovery from spinal block in the PACU. Methods: One hundred patients received lumbar plexus blockage at the psoas compartment through nerve stimulator and a 0.25% enantiomeric excess levobupivacaine 40-ml injection. Analgesia and pain severity were evaluated at 4, 8, 12, 16, 20 and 24 hours after surgery, similarly to rescue opioids.