Ultrasound-Guided Quadratus Lumborum Block: An Updated Review of Anatomy and Techniques

Figure 10

Ultrasound images of intramuscular QLB. (a) Preinjection, (b) test injection, and (c) postinjection. EO: external oblique muscle, QL: quadratus lumborum, white arrow: needle trajectory, and white dotted line: spread of local anesthetic within (b) or in between (c).

(a)

(b)

(c)