Analgesic Efficacy of Quadratus Lumborum vs. Transversalis Fascia Block in Laparoscopic Hernia Surgery

In the Transversalis Fascia Block group, the same procedure will be followed as in the Quadratus Lumborum block group, with the ultrasound probe being placed in the same location, and the same in-plane technique will be applied with a 22G 100 mm peripheral block needle. After hydrodissection, 20 mL of 0.5% bupivacaine will be injected slowly in the same manner.

In the Quadratus Lumborum block group, in the lateral decubitus position, a convex ultrasound probe will be sterilely placed in the subcostal area and above the iliac crest. The quadratus lumborum and psoas major muscles, as well as the L4 vertebra's transverse process, will be visualized. Using the in-plane technique and a 22G 100 mm peripheral block needle, the placement will first be identified through hydrodissection in the subfascial area between the quadratus lumborum and psoas major muscles. After localization, 20 mL of 0.5% bupivacaine will be injected slowly, aspirating every 5 cc, while visualizing the local anesthetic pushing the fascia in the ultrasound image.