What are sacroiliac joint injections?
Sacroiliac joints are diarthrodial joints made up of synovial fluid. The bony wall of the sacrum is made up of hyaline cartilage, although the pelvic side is lined by fibrocartilage. These injections are relatively safe, so long as the needle does not advance beyond the anterior wall of the sacrum to hit viscera. Performing a thorough history and physical examination aids in the diagnosis of SI joint dysfunction. Confirmation of the source of a patient’s pain can be accomplished with a diagnostic sacroiliac joint injection. Often these injections are performed using fluoroscopy to assist in visualizing the inferior pole of the joint. This is often the site for a steroid injection.