Sacroiliac (SI) Joint Injections
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An image-guided injection that confirms and treats a common, often-overlooked cause of low back and buttock pain.
Overview:
The sacroiliac (SI) joints connect the base of the spine to the pelvis and are estimated to be responsible for a meaningful share of chronic low back pain cases, though they are frequently overlooked because standard imaging often appears normal. An SI joint injection delivers local anesthetic and a corticosteroid directly into the joint, both to confirm it as the source of pain and to reduce inflammation. It is often considered for one-sided low back and buttock pain that has not responded to conservative care.
How It Works:
The patient lies face down while the physician uses fluoroscopic or ultrasound guidance to advance a needle into the joint, often confirming correct placement with contrast dye before injecting the medication. The procedure typically takes 15-25 minutes with local anesthesia and usually does not require sedation.
Conditions It Treats:
SI Joint Pain & Sciatica • Back Pain
What to Expect:
Mild soreness at the injection site for a few days is common, and some patients notice a brief flare of pain before the steroid’s anti-inflammatory effect takes hold, typically within 3-7 days. Relief commonly lasts from several weeks up to a few months, and repeat injections or progression to radiofrequency ablation may be recommended if pain recurs.
