Comparison of Clinical Efficacy and Anatomical Investigation between Retrolaminar Block and Erector Spinae Plane Block

Figure 1

The injection point of the retrolaminar block and erector spinae plane block. The needle used for retrolaminar block (RLB) is inserted 1 cm lateral to the spinous process and local anesthetic is injected on the lamina. The needle used for erector spinae plane block (ESPB) is inserted 2-3 cm lateral to the spinous process and local anesthetic is injected on the transversus process. In both RLB and ESPB, the needle is not required to penetrate the superior costotransverse ligament.