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

Figure 2

Ultrasound images of retrolaminar block and erector spinae plane block. The sagittal plane with a linear ultrasound probe allows for visualization of the laminae or transversus process. The insertion points for retrolaminar block (RLB) and erector spinae plane block (ESPB) are similar. The transversus process is more superficial than the lamina in the ultrasound image, and the injection point for ESPB is close to the pleura.