Sacroiliac Joint✤ Attachment of the hind legs to the spine✤ Non-mobile joint✤ Transfers hind limb propulsive forces to the vertebral column✤ Prominence of the tuber sacrale occurs when muscles/ligaments holding the SI in place are torn
Diagnosis of SI Subluxation✤ Musculoskeletal examination and gait analysis to determine if painful✤ Hunter’s Bump can be chronic or acute: ✤ If the luxation is chronic but stable, the horse may not be painful. ✤ If the luxation is acute and unstable, hind end lameness is usually evident✤ A Hunter’s Bump is evidence of SI disease.
Diagnosis of SI Subluxation✤ Subluxation and pain can occur prior to visible development of Hunter’s Bump ✤ lack of Bump does not rule out SI pain✤ Ideally we would like to identify SI strain prior to full luxation and visible changes to the pelvis✤ Nuclear Scintigraphy(Bone Scan) - intravenous injection of radioactive material and detection of "hot spots" by use of a gamma camera.
Treatment for SI Subluxation✤ Rest and controlled rehabilitation typical for any soft tissue injury✤ Ultrasound guided injection of Steroids into SI joint to reduce inﬂammation and pain