Comparison Between the Quadratus Lumborum Block ,Erector Spinae Plane Block in Lower Abdominal Surgery

20mg of Bupivacaine hydrochloride as local anesthetic will be used in (QL) group and (ESB) group

high-frequency linear probe covered with sterile sheath Active Array L12-4 (8-13MHz) of an ultrasound machine (Philips clear vue350, Philips Healthcare, Andover MA01810, USA) for performing the blocks .

injection of 4mg dexamethasone in each block

22- gauge, 50 mm echogenic needle (Stimuplex D; B Braun, Germany) for performing the blocks .