Figrue
(A) An erector spinae plane block is performed using an in-plane needle insertion from cephalad to caudal. The tip of the needle is located underneath the anterior aponeurotic fascia of the erector spinae muscle at the level of the T2 transverse process (TP2). Reprinted with permission from the Philip Peng Educational Series. (B) The catheter is inserted through an 18G Tuohy needle and is clearly visualized in the erector spinae plane. (C) The tip of the Tuohy needle is visualized at the T2 transverse process (TP2), and the catheter is clearly seen in the erector spinae plane following the trajectory from the T2 to the T3 transverse process (TP3). Reprint with permission from Philip Peng Educational Series