Sacroiliac Joint Injections


Sacroiliac Joint Injections


  • A sacroiliac (SI) join injection, or a sacroiliac join block, is primarily used to either diagnose or treat low back pain or sciatica symptoms. This pain is more prevalent in females, particularly those that have given birth, due to the fact that during vaginal birth the bones at this joint move out of place to accommodate the baby, and do not always move back into the proper place.
  • A diagnostic SI joint injection is used to confirm a suspected diagnosis of sacroiliac joint dysfunction. This is done by numbing the sacroiliac join with local anesthetic. The injection is performed under a live X-ray guidance, or fluoroscopy, for accuracy. Once the needle has entered the SI join, contrast is injected into the joint to ensure proper needle placement and spread of medication. The numbing medication is then injected into the joint.
  • After the procedure, the patient is asked to do every day activities, including those that previously caused pain. If the patient experiences 75-80% pain relief for the duration of the anesthetic, a tentative diagnosis of SI joint dysfunction is made. A second SI injection is performed to confirm the diagnosis.


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