What is the role of arthrography in the workup of developmental dysplasia of the hip (DDH)?

Updated: Feb 26, 2018
  • Author: Junichi Tamai, MD; Chief Editor: William L Jaffe, MD  more...
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Answer

Arthrography is a dynamic study, performed by injecting radiopaque dye into the hip joint and then carrying out a fluoroscopic examination, usually with the patient under anesthesia. Although it can be performed independently, it is routinely performed in conjunction with a closed reduction. Arthrography can be helpful in determining the underlying cartilaginous profile and dynamic stability of the hip. [36] It has also been used in conjunction with a hip MRI study to facilitate demonstration of labral tears.

When arthrography is performed in combination with a closed reduction, the adequacy of the reduction can be assessed. Increased medial joint space, as demonstrated by medial pooling of the dye and a rounded or interposing limbus, may be indicative of poor long-term results. After closed reduction and immobilization in a hip spica cast, a limited CT scan in the transverse plane is obtained to ensure the hip is not subluxated or dislocated posteriorly.


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