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

<div>Ultrasound images of anterior QLB. (a) Preinjection and (b) postinjection. QL: quadratus lumborum, PM: psoas muscle, white arrow: needle trajectory, and white dotted line: spread of local anesthetic.</div>

BioMed Research International

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Figure 4

Figure 4: Ultrasound-Guided Quadratus Lumborum Block: An Updated Review of Anatomy and Techniques 