SI Joint Injections

A SI (sacroiliac) joint injection is a minimally invasive procedure that delivers a local anesthetic and/or corticosteroid medication directly into the sacroiliac joint, which connects the lower spine (sacrum) to the pelvis (ilium). This procedure is used both diagnostically and for therapeutic relief.

Diagnostically, to confirm whether pain is coming from the SI joint. A local anesthetic temporarily numbs the joint; if pain drops significantly (often 75% or more) within 15 to 30 minutes, the SI joint is identified as the source.

Therapeutically, to relieve chronic lower back, buttock, groin, or hip pain caused by inflammation, injury, pregnancy, or conditions like sacroiliitis and osteoarthritis. The steroid reduces swelling, providing relief that can last from several weeks to months.