Comparing the Effect of Classical and Modified Thoracolumbar Interfascial Plane Block on Postoperative Pain and IL-6 Level in Posterior Lumbar Decompression and Stabilization Surgery.

Background: Ultrasound (US)-guided classical and modified thoracolumbar interfascial plane (TLIP) blocks are often used to provide adequate analgesia after lumbar spinal surgery. Postoperative pro-inflammatory interleukin 6 (IL-6) blood concentrations after lumbar spine surgery are related to postoperative pain and inflammation.

Objectives: The purpose of this prospective randomized parallel controlled study was to assess postoperative pain and serum levels of pro-inflammatory IL-6 after posterior lumbar decompression and stabilization surgery with a classical and modified technique of TLIP block.