The S1 “Scotty Dog”: Report of a Technique for S1 Transforaminal Epidural Steroid Injection

Classic description of the S1 spinal nerve block uses an anteroposterior approach to the foramen. Looking for an S1 Scotty dog facilitates predictable visualization of the foramen, medial needle placement with epidural flow of contrast, and simultaneous visualization for needle placement to the L5 foramen.