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.” If lidocaine is injected into the 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.1

Click here to download a PDF of the Diagnostic Pad.

Diagnostic SI Joint Injection

  • Posterior & inferior approach
  • 22 gauge 5" styletted needle
  • 0.25ml contrast medium
  • 1.25ml Lidocaine

Sacroiliac Joint Injection Diagram

  1. Dreyfuss, Paul et al. "Sacroiliac Joint Pain." J Am Acad Orthop Surg 2004;12:255-265.

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