Diagnostic Injections for the Sacroiliac Joint
When the SI joint is suspected as the source of the patient’s low back pain, confirmation is provided by image-guided injection. This injection is the diagnostic “litmus test” for SI joint conditions.
SI Joint Diagnostic Injection
When a local anaesthetic is injected into the sacroiliac joint and symptoms temporarily resolve, this is confirmation of the SI joint as the source of the patient’s low back pain.
If, following the injection, the patient's pain is decreased a significant amount, then it can be concluded that the SI joint is either the source, or a major contributor, to the low back pain.121
The current standard is that an SI joint injection should be performed under fluoroscopic guidance, utilizing contrast to confirm needle placement, injecting no more than 2 ccs. of solution whether it's a diagnostic and/or a therapeutic injection.
- Posterior and inferior approach
- 22 gauge 5" styletted needle
- 0.25ml contrast medium
- 1.25ml local anesthtic
AP inferior SIJ target
AP needle in SIJ pre-contrast
AP needle in SIJ
Lateral needle in SIJ
Diagnostic Injection Worksheet
Patient Sacroiliac Joint Diagnostic Injection Worksheet for pre- and post-injection evaluation.Download
SI Joint Injection Demonstration
The current standard is that an SI joint injection should be performed under fluoroscopic guidance.View all videos