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

Figure 3

The distribution pathway of local anesthetics in retrolaminar block and erector spinae plane block. The paravertebral block (PVB) pathway involves both the ventral and the dorsal spinal rami and showed similar mechanism with PVB. The lateral pathway involves the lateral cutaneous branch and small branches of intercostal nerves. This pathway was similar to the mechanism underlying interfascial plane block.