Bilateral Ultrasound Guided Quadratus Lumborum Versus Lumbar Epidural Block on Postoperative Analgesia, and Inflammatory Response in Abdominal Surgery

echogenic needle will be inserted in-plane with the ultrasound beam in a posterior-to-anterior direction through the quadratus lumborum muscle until the ventral fascia of the muscle penetrated. At this point, the needle directed toward the fascial plan between the quadratus lumborum and the Psoas muscle

lumbar epidural will be performed for patients in group II using a 16-gauge Touhy epidural needle by a median approach. The T12 - L1 or L1 - L2 interspaces will be chosen for the injection. The epidural space identified by the loss of resistance technique.