Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2022 Mar 23;47(6):380–383. doi: 10.1136/rapm-2021-103242

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© American Society of Regional Anesthesia & Pain Medicine 2022. Re-use permitted under CC BY-NC. No commercial re-use. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, an indication of whether changes were made, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

PMC Copyright notice

Ultrasound view. (A) Ultrasound view of needle trajectory. Curvilinear robe is oriented in an axial in-plane view to observe the introducer needle and its anticipated trajectory toward the spine. In this example, the needle trajectory extends just along the posterior border of the peritoneum toward the foramen. (B) Drawing of structures shown in A. Solid border on arrow shows the needle advanced to the depth shown in A. Dashed border on arrow shows the anticipated trajectory of the needle into the foramen. Image included with patient consent. EO, external oblique; IF, intervertebral foramen; IO, internal oblique; PC, peritoneal cavity; PM, psoas major; QL, quadratus lumborum; TA, transversus abdominis; TP, transverse process; VB, vertebral body.