Fig. 2From: The analgesic efficacy of ultrasound-guided transversus abdominis plane block for retroperitoneoscopic renal surgery: a randomized controlled studySonography of the lateral TAP block, indicating the ultrasound anatomical structure (a) and the spread of local anaesthetic (b). The green arrow indicates the needle trajectory; EO: external oblique; IO: internal oblique; TA: transversus abdominis; LA: local anaestheticBack to article page