Erector Spinae Plane Block Versus Modified Thoracolumbar Interfascial Plane Block

The probe will be placed in the parasagittal plane at the level of the L3 vertebrae. The spinous process will be visualized, and the probe was moved 3 cm laterally from the midline. The erector spinae musclewill be visualized above the transverse process. The needle will be punctured in the craniocaudal direction using the in-plane technique. The needle will be directed superior to the transverse process . Then, 2 mL normal saline solution will be injected into the deep fascia of the erector spinae muscle to confirm the proper injection site. After ensuring the location of the needle, 20 mL of 0.25% bupivacaine will be administered. The same ESPB procedure will be performed on the other side. In total, 40 mL of 0.25% bupivacaine was administered

The probe will be placed vertically at the L3 vertebrae level. The spinous process and the interspinous muscles (i.e., multifidus, longissimus, and iliocostalis) will be visualized as the anatomic guide points. The probewill be moved laterally to identify the longissimus and iliocostalis muscles . The needlewill be inserted between the longissimus and iliocostalis in the medial-to-lateral direction using the in-plane technique. After confirming the location of the needle, 20 mL of 0.25% bupivacaine will be administered. The same mTLIP procedure will be performed on the opposite side. In total, 40 mL of 0.25% bupivacaine will be administered