Authors: David J. Krodel, MD, MS, FASA – Ann & Robert H. Lurie Children’s Hospital of Chicago, Northwestern Feinberg School of Medicine Michael A. Evans, MD – Ann & Robert H. Lurie Children’s Hospital of Chicago, Northwestern Feinberg School of Medicine


A three-month-old male infant is status post aortic coarctation repair. The following image was documented during a regional block performed for postoperative pain. Which of the following regional anesthetic techniques was MOST LIKELY performed based on the image?