Fig. 2From: Unilateral neurostimulation-assisted cervical epidural anesthesia for upper limb surgeries—a case seriesA Catheter tip in the posterior epidural space (PES). The upper limit of contrast is at the C2 level. B Catheter tip is lateralized in the cervical epidural space with maximum contrast spread on the surgical side and minimal spread on the non-operative sideBack to article page