Fig. 2From: Analgesic effect of the ultrasound-guided thoracolumbar paravertebral block in patients undergoing robot-assisted laparoscopic nephrectomy: a randomized controlled trialL1 paravertebral block under ultrasound guidance. SP, spinous process; AP, articular process; ITL, intertransverse ligament; LPV space, lumbar paravertebral space; P, posterior; A, anterior; L, left; R, rightBack to article page