Quadratus Lumborum Block Type 2 Versus Posterior Transversus Abdominus Plane Block

Twenty mL of bupivacaine 0.25% will be injected in the plane between the transverses abdominus muscle and the fascia deep to the internal oblique muscle on each side

Twenty mL of bupivacaine 0.25% will be injected on the posterior surface of quadrates lumborum muscle on each side