Fig. 1From: The ultrasound-guided proximal intercostal block: anatomical study and clinical correlation to analgesia for breast surgerya Fluoroscopic image of 2nd proximal intercostal space injection; b Fluoroscopic image after the subsequent 4th proximal intercostal space injection; c The final image illustrates the distal (lateral) spread to the left 2nd and 4th intercostal spaces (white arrows), the corresponding ipsilateral paravertebral spread from C6 to T6 (black arrows), contralateral epidural spread (red arrow) and endothoracic plane spread (green arrow)Back to article page