Effect of the Erector Spinae Plane Block in on Robotic Colorectal Surgery

Erector spinae plane block is not a drug or a device. It is a regional method for anesthesia/analgesia. Before block application, patients were placed in a sitting position. A preliminary examination with a high-frequency linear probe was performed to identify the application site. Sterile conditions were then established. An ultrasound probe was longitudinally placed approximately 2 cm lateral to the T11 spinous process. The transverse process was visualized. 1 ml of 2% lidocaine was applied to the estimated needle entry site. The needle was then guided toward the transverse process using an out-of-plane method using a blocking needle (Stimuplex® Ultra 360® 22G 80 mm, Melsungen, Germany). After bone contact was achieved, facial hydrodissection was observed with 1-2 ml of saline solution to verify the correct injection site. 20 ml of 0.25% bupivacaine was injected into the plane. The distribution of the drug was visualised by USG.