Postoperative Analgesia of Quadratus Lumborum Block Versus Epidural Block After Major Abdominal Surgeries

Patients who will be subjected to epidural block will be placed in the lateral position then, after sterilization of the skin, 21 G spinal needle will be inserted at T9-T11 intervertebral spaces. The epidural space will be located using the loss of resistance to air technique and a mixture of bupivacaine 0.25% + 50 μ fentanyl targeting T6 level will be injected following induction of general anaesthesia.

Patients who will be subjected to major abdominal surgeries will be placed in a supine position with a pillow under their side to obtain an appropriate view of quadratus lumborum muscle. After sterilization of the skin and ultrasound-guided identification of the quadratus lumborum muscle, 20 ml bupivacaine 0.25% + 25μ fentanyl will be injected on each side following induction of general anaesthesia

propofol: 1.5-2.5mg/Kg

Atracurium : 0.5mg/Kg.

Sevoflurane 0.7-1.5 MAC in 40% oxygen