Sacro Iliac Injection

Where is the sacroiliac joint?
The sacroiliac joint is a firm, large C-shaped joint that that connects the pelvic bones to the lowest part of the spine (sacrum). They help absorb all of the damaging shock forces of the upper body before balancing and transmitting their weight to the hips and legs. They move constantly when the body is in motion. Additionally, they coordinate muscle firing patterns between the pelvis, low back and hips while walking, running and bending. Basic structural support is also provided while standing in place and sitting. Frequently, SI joint dysfunction co-exists with lumbar disc herniations and lumbar facet syndrome. This occurs because the low back and pelvis rely on many common structures to ensure normal stability and function. When these joints become inflamed or irritated, they may cause pain in the lower back, hips, groin or legs.

What is a sacroiliac (SI) joint injection?
Used as a diagnostic and therapeutic tool, this injection targets lower back and buttock pain. An anti-inflammatory steroid medication and local anesthetic is injected into the inflamed joint. The local anesthetic numbs the joint and also numbs and relaxes the muscles around the joint. To ensure proper placement of the medication the procedure is performed under x-ray – also known as fluoroscopy.