Study Question:

• Does a single injection at the anterior inferior psoas reach the LFCN, FN, and ON?

Model:

• 2 cadavers, three hips; methylene blue 0.1%, 30 mL.

Key Findings:

• An anterior approach using the single injection anterior inferior psoas injection technique can reproducibly provide coverage of the LFCN, FN, and ON.

Potential Clinical Applications:

• The anterior inferior psoas injection technique is a potentially safer alternative and can provide similar coverage to the lumbar plexus block using an anterior supine approach.

Next Steps:

• Prospective clinical trials evaluating analgesic efficacy, opioid use, and functional outcome in patients undergoing hip surgery.