Lateral Versus Posterior Quadratus Lumborum Block in The Pediatric Patients Undergoing Orchiopexy

Local anesthetic may spread to the T6-L1 spinal nerves and paravertebral area by spreading through the lateral QLB to the transversus abdominis plane, and posteriorly via the anterior thoracolumbar fascia.

In posterior QLB, the local anesthetic can spread on the anterior and lateral cutaneous branches of T4-L1 spinal nerves by administration of the agent to the lateral interfascial triangle.