Sacroiliac Joint Injection

Targeted Treatment for SI Joint Dysfunction

Who Benefits from SI Joint Injections?

• Patients with chronic lower back or buttock pain where SI joint dysfunction is suspected based on examination (positive provocation tests)
• Individuals with pain that worsens when rising from sitting, climbing stairs, or rolling in bed
• Those with unilateral (one-sided) lower back/buttock pain radiating into the posterior thigh (not below the knee)
• Patients with history of prior lumbar fusion surgery, which alters pelvic biomechanics and increases SI joint stress
• Individuals with pregnancy-related or postpartum pelvic/SI joint pain from ligamentous laxity
• Those with inflammatory conditions like ankylosing spondylitis causing sacroiliitis
• Patients needing diagnostic confirmation before considering SI joint fusion or radiofrequency ablation

What Conditions does Sacroiliac Joint Injection Help Ease?

This procedure may help with:

The SI Joint Injection Procedure

1. Pre-Procedure Evaluation

   Following consultation and physical examination (provocative maneuvers like FABER, Gaenslen's, thigh thrust tests), imaging review may include X-rays or MRI to rule out other pathology. Complimentary MRI reviews help differentiate SI joint pain from disc or facet sources.

2. Patient Positioning

   This outpatient procedure is performed with the patient lying prone (face down). The sacroiliac joint is identified using fluoroscopic (X-ray) guidance. The skin over the SI joint is thoroughly cleaned and numbed with local anesthetic.

3. Fluoroscopic Needle Guidance

   Using continuous fluoroscopy in multiple planes (AP and oblique views), a thin spinal needle is advanced through the posterior iliac bone into the SI joint space. The joint is relatively narrow and requires precise image-guided placement to ensure intra-articular (inside the joint) medication delivery.

4. Contrast Confirmation

   Contrast dye is injected to confirm proper needle placement within the SI joint and visualize the joint's arthrogram (outline). Proper intra-articular spread is essential for both diagnostic validity and therapeutic efficacy. If contrast spreads outside the joint, needle repositioning is required.

5. Diagnostic and Therapeutic Medication

   A combination of local anesthetic (lidocaine or bupivacaine) and corticosteroid is injected into the SI joint. The anesthetic provides immediate pain relief (diagnostic component), while the steroid reduces inflammation for longer-term therapeutic benefit (weeks to months).

6. Post-Injection Assessment

   After brief monitoring, you're asked to perform movements that typically provoke your SI joint pain. Significant immediate pain reduction (50-75%+ improvement for 4-6 hours) confirms the SI joint as the pain source and predicts good response to more definitive treatments like SI joint fusion or denervation if needed.

Benefits of Sacroiliac Joint Injection

• Provides both diagnostic confirmation and therapeutic relief for SI joint dysfunction
• Offers significant reduction in lower back and buttock pain when SI joint is the pain source
• Helps differentiate SI joint pain from other lower back pain sources (discs, facets, hip)
• Is a minimally invasive outpatient procedure with low risk and minimal downtime
• Can lead to reduction in oral pain medication use
• Improves ability to perform previously painful movements (stairs, rising from sitting, rolling in bed)
• Guides treatment decisions for longer-term interventions if needed (fusion, denervation)

Recovery from SI Joint Injection

Same-Day Recovery: Patients typically go home within 30-60 minutes after the injection. Temporary soreness at the injection site is common but resolves within 24-48 hours. You should arrange for a driver as numbness in the buttock/leg from the anesthetic may temporarily affect mobility.

Diagnostic Phase (Hours 0-6): The local anesthetic provides immediate relief if the SI joint is the pain source. Significant pain reduction during this window (50-75%+ improvement with previously painful movements) confirms the diagnosis. Track your pain levels during this period and report back to your specialist. If relief is minimal, other pain sources should be investigated.

Days 1-3: As the anesthetic wears off, pain may temporarily return before the corticosteroid begins working. This is normal and does not indicate treatment failure or incorrect diagnosis.

Days 3-14: Steroid anti-inflammatory effects begin, with progressive reduction in lower back and buttock pain, improved tolerance for stairs/getting up from chairs, and decreased pain with rolling in bed. Many patients notice significant improvement during this period.

Weeks 2-12+: Maximum pain relief typically occurs during this period, lasting weeks to months depending on the underlying SI joint pathology and inflammation severity. Relief duration varies:

• Acute SI joint inflammation: 3-6+ months relief
• Chronic SI joint dysfunction: 1-3 months relief
• Post-fusion adjacent segment disease: Variable, 6-12 weeks typical

When to Consider Long-Term Solutions: If diagnostic injections provide excellent but temporary relief (confirming SI joint as pain source), you may be a candidate for SI joint fusion or radiofrequency denervation of SI joint nerves for longer-lasting relief (12+ months). If relief is minimal despite proper injection technique and intra-articular placement, other pain generators should be explored including facet joints, discs, or hip pathology.

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Locations Offering Evaluation

Our board-certified specialists offer sacroiliac joint injection evaluation and treatment at locations across Florida, New Jersey, New York, and Pennsylvania. Schedule a consultation at a clinic near you.