Thorough assessment of the acetabulum (in the absence of CT) should include oblique internal and external pelvis views (Judet views). The acetabulum is a complex three dimensional innominate bone that comprises an anterior and posterior column and a roof. If one of the rings are disrupted, look for a second fracture Trace in the inner cortext of the two obturator foramina Pelvic ringsĬarefully trace the inner cortex of the pelvic ring Bony anatomy assessment frequently involves well known anatomical lines and boundaries for breaks in the cortex. The pelvis forms a ring structure, and depending on the mechanism of injury there may be more than one fracture. Much of the interpretation is down to regions, rings and lines alongside an understanding of traumatic fracture patterns of the pelvic ring.Īssess all soft tissue structures for any associated or incidental soft tissue signs. The pelvis radiograph is comprised of the innominate hip bones or os coxae (ischium, pubis and ilium), the sacrum and the proximal femur. Upon identifying an abnormality, do not cease the review, put it aside and ensure to complete the checklist. Review the entire radiograph, regardless of perceived difficulty. The order in which you interpret the radiograph is a personal preference. A recommended systematic checklist for reviewing musculoskeletal exams is soft tissue areas, cortical margins, trabecular patterns, bony alignment, joint congruency, and review areas. The artery in the round ligament (ligamentum teres) supplies the femoral head with blood, but the primary blood suppliers. The acetabulum is formed by three fused ossal structures: the illium, ischium and pubis (complete bony fusion is achieved at the age of 20-25 years). Choosing a search strategy and utilizing it consistently is a helpful method to overcome common errors seen in diagnostic radiology. The hip joint is a ball ( femoral head) and socket (acetabulum) joint.
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