Ultrasonography of the proximal hind limb: pelvis and sacroiliac joint

The pelvis in horses is a complex anatomical structure formed by three large bones: ilium, pubis and ischium and by the coxofemoral, sacroiliac and pubic symphysis joints. The pelvis is also covered by an extensive musculature that, together with the size of the horses, is a challenge in radiological and ultrasound imaging. The ultrasound evaluation of the pelvic region is a very practical and precise technique, non-invasive, not so expensive in terms of both time for the veterinarian and economic for the owner and that presents a series of clinical advantages. The images can be obtained by percutaneous ultrasound from the dorsal area or by transrectal ultrasound. Ultrasound-guided injection of areas such as the sacroiliac, sacral, or coxofemoral joints allows the veterinarian to treat them accurately or to use local anesthetic to locate the source of pain.