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Your doctor has recommended an SI (sacroiliac) injection. The sacroiliac joint is responsible for the articulation, or movement, between the sacrum and the main bone of the pelvis.

Under fluoroscopy (x-ray guidance machine), a small amount of material is injected to stretch or expand, the sacroiliac joint capsule. You will be asked to identify if this has reproduced discomfort similar to your own. Subsequently, an anesthetic agent is given to temporarily block the pain. If ordered by your doctor, a long-acting steroid pain reliever may also be administered.

Remember, it is important for you to come to the appointment with your typical pain in order to judge whether the injection is helpful. We ask that you do not take any pain medication after midnight the night before the injection.

You will need someone to drive you home after the injection; otherwise, you may resume your normal activities.