case_images: PMC2911615_01
case_images: Oblique view of the needle at the posterior cord.
case_images: ARP2010-208025.001.jpg
case_images: PMC2911615_01_ARP2010-208025.001.jpg
case_images: fig1
case_images: Arrow Tuohy needle (Arrow International; Reading, PA) connected to a nerve stimulator (standard for our institution set at pulse duration 0.3 ms, current 1.5 mA, frequency 2 Hz) was advanced in a saggittel plane toward the nerves with 3D US visualization (Figure 1). After correct positioning was corroborated by appropriate distal motor nerve response of the posterior cord, a 19-gauge stimulating catheter (Stimcath, Arrow International; Reading, PA) was advanced 5 cm past the needle tip under continuous stimulation.
case_images: Oblique view of the nerve catheter inferior to the posterior cord.
case_images: ARP2010-208025.002.jpg
case_images: PMC2911615_01_ARP2010-208025.002.jpg
case_images: fig2
case_images: After injection of 30 cc of local anesthetic (ropivacaine 0.5%), the catheter was visualized lying across the nerve bundle (Figure 2).