Continuous lumbar plexus block: Use of radiography to determine catheter tip location.

Background And Objectives: The purpose of this article is to document where a lumbar plexus catheter introduced by the posterior approach will track and to evaluate the benefit of using systematic radiographic verification of catheter placement.

Methods: A continuous lumbar plexus block (CLPB) by the posterior approach was performed on 169 consecutive adult patients scheduled for major hip, thigh, or knee surgery. Each catheter was verified by radiography using 10 mL contrast medium.