Sacroiliac Injection Technique
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The sacroiliac joint, which forms the articulation between the pelvis and the spine, is often considered a location of elusive pain in horses. However, its deep location and, thereby, limited accessibility make diagnosis (via nerve blocks) and injection-based treatment difficult. At the 2007 American Association of Equine Practitioners Convention, held Dec. 1-5 in Orlando, Fla., Florent David, DVM, DES, MSc, Dipl. ACVS, ECVS, a large animal surgeon at the University College Dublin in Ireland, presented the results of a study (performed when he was at the University of Montreal in Canada) that evaluated four different ultrasound-guided approaches to injecting this difficult joint.
After describing equine sacroiliac anatomy, David described the various techniques that were used (cranial, craniomedial, medial, and caudal–from the head direction, head/midline, from the midline outward, and from the tail direction, respectively). All approaches used a 20-cm, 18-gauge needle manually curved to a 40� angle, and all techniques were performed on 14 cadaver pelvises using different colors of latex (2 mL per injection) to distinguish them.
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Christy M. West
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