Evaluation of Dermatomal Distribution in the Erector Spinae Plane (ESP) Block

In patients with chest pain, ultrasound-guided Erector Spinae Plane Block block was performed at T5 transverse process in the cephalo-caudal direction with Tuohy 18 gauge needle in plane until the needle tip was located in the interfascial plane between the transverse process and the erector spinae muscles, 20 ml of bupivacaine 0.5% was administered and a catheter was inserted if indicated.